Madd Essay - 887 Words

MADD Ronice Washington BSHS/355 6/5/2013 Carol Felcyn MADD Mothers Against Drunk Driving (MADD) is a nonprofit organization in the United States that seeks to stop drunk driving, support those affected by drunk driving, prevent underage drinking, and overall push for stricter alcohol policy. The Irving, Texas–based organization was founded in 1980 in California by Candice Lightner after her 13-year-old daughter Cari was killed by a drunk driver. On May 3, 1980 Lightner’s 13-year-old daughter, Cari, was killed by a drunken hit-and-run driver at Sunset and New York Avenues in Fair Oaks, California. The 46-year-old driver, who had recently been arrested for another DUI hit-and-run, left her body at the scene. MADDs original goal†¦show more content†¦(Hanson, 2002-2007). There were a lot of different policies put in place as a result of MADD’s persistence. The police force soon grew to include every recognized highway safety group in the state, along with legislators, insurance companies, law enforcement agencies, etc. The power of numbers was soon evident as the Coalition set legislative initiatives and used its power and influences to bring them to the public and to the forefront. Within two years, a graduated license law was passed that would require teens receive more driver training before hitting the highways alone. Other laws passed in that time included a secondary seat belt law, stiffer penalties for driving under the influence with children in the vehicle, the long-fought for Open Container law, and finally after 15 years, the .08 BAC law. Following are a couple of laws that MADD is spearheading in this state: Improve the enforcement of DUI/DWI laws with Sobriety Checkpoint Sobriety checkpoints are an effective, constitutional way to stop drunk driving that reduce alcohol-related fatalities by an average of 20%. However, some states still do not do sobriety checkpoints. Finally, there is a technology that has the potential to eliminate repeat drunk driving offenses the ignition interlock. These devices prevent a vehicle from being driven by a drunk driver and should be mandatoryShow MoreRelated A Guide to MADD Sites Essay2512 Words   |  11 PagesA Guide to MADD Sites â€Å"In 2001, more than half a million people were injured in crashes where police reported that alcohol was present — an average of one person injured approximately every 2 minutes† (Blincoe qtd. in MADD main). â€Å"In 2002, an estimated 17,419 people died in alcohol–related traffic crashes—an average of one every 30 minutes. These deaths constitute 41 percent of the 42,815 total traffic fatalities [in America]† (NHTSA qtd. in MADD main). From these statistics, itRead MoreEssay on MADD, A Driving Force for Change1257 Words   |  6 Pages’s mission statement was â€Å"to aid the victims of crimes performed by individuals driving under the influence of alcohol or drugs, to aid the families of such victims and to increase public awareness of the problem of drinking and drugged driving. (MADD,1) When M.A.D.D. came together in 1980, they were originally called the mothers against drunk drivers, however, as time moved on they cha nged their name to the mothers against drunk driving and stated that they were opposed to the crime of drunk drivingRead MoreMadd s Death Against Drunk Driving1297 Words   |  6 PagesMission Statement MADD was incorporated on September 5, 1980, the mission or purposes of MADD as stated in its Articles of Incorporation were â€Å"To aid the victims of crimes performed by individuals driving under the influence of alcohol or drugs, to aid the families of such victims and to increase public awareness of the problem of drinking and drugged driving. In 1984, MADD changed its name from Mothers Against Drunk Drivers to Mothers Against Drunk Driving. This carefully considered change wasRead More MADD: Mothers Against Drunk Driving Essay1939 Words   |  8 PagesMADD: Mothers Against Drunk Driving It is 2:20 in the morning when the phone rings. You are automatically startled and jump to pick it up after the second ring. That feeling in your stomach tells you that something is terribly wrong. It is the police on the other end of the line telling you that your daughter has been in a fatal accident. As the officer is talking, you seem to freeze and zone out. Your spouse is up now and takes the phone and talks to the officer to find out what is going onRead MoreMothers Against Drunk Driving Essay729 Words   |  3 Pageswas founded on September 5, 1980 by Candy Lightner. Lightner started the organization after her 13-year old daughter was killed by a drunk driver. The purpose of MADD is to make an effort in trying to stop drunk driving, help prevent underage drinking, seek for stricter driving policies, and help families affected by drunk driving. MADD has helped more than 330,000 lives and is still helping. In July, 1984 Mothers Against Drunk Drivers decided to change the name t o Mothers Against Drunk Driving becauseRead MoreEssay Titled Mothers against Drunk Driving,710 Words   |  3 Pagesï » ¿Mothers against Drunk Driving Introduction Mothers against drunk driving also known as MADD is an organization that was founded on September 5th 1980. This lobbying group was founded by a mother whose daughter was killed in an accident caused by a drunk driver. Its original mission or purposes as declared in its incorporation article were to assist the victims of crimes performed by individuals driving under the influence of drugs and/or alcohol, and the families of the victims, and also toRead MoreGovernment Esssay Essay715 Words   |  3 Pagesorganizations in the United States such as the MADD, LULAC, and NAACP can educate and help our fellow citizens of America change laws that might well need to be changed. As well as explaining the common interest these groups are concerned with. First you might ask what is the MADD and what do those letters stand for? Well I will tell you MADD is a lobby group for drinking and driving and they’re a huge organization throughout North America. MADD stands for Mothers Against Drunk Driving and they’reRead More Driving Under the Influence Essay1409 Words   |  6 PagesChildren see their parents, or other adults figures, have a beer or a cocktail and get in the car. Thus, making it seem like it is acceptable to drink and drive. â€Å"One in three people will be involved in an alcohol-related crash in their lifetime† (MADD). Driving under the influence is measured by a person’s blood alcohol level (BAC). BAC is determined by the concentration of alcohol in the bloodstream. Individual counties and states have their own legal level on blood alcohol percentages thatRead More Crusaders against the Wrong Choices Essay1489 Words   |  6 PagesAccording to http://www.madd.org, 41% of all traffic accidents in the country are alcohol-related. In 2002, this added up to a grand total of 17,419 deaths caused by somebody getting behind the wheel of a car while under the influence of alcohol (MADD). Naturally, statistics such as these, if the were presented effectively, would probably make quite a large number of people want to do something about the unnecessary deaths across the country. That’s where SADD comes in. SADD isRead MoreThe Theory Of Public Health1657 Words   |  7 Pagesshortcomings. Population based intervention : MADD (mothers against drunk driving) Howard County. Drinking alcohol is a part of many individuals life but for a significant proportion the amount and pattern causes harm both to themselves and others. Harms can include injuries, alcohol poisoning , chronic health problems, road trauma, offending and abuses of others. (health policy approach, 2016). MADD is a non profit organisation dedicated to eliminating

A Brief Note On Wrongful Conviction And Criminal Justice...

Vernon Randall Professor George Slone Effectiveness in Writing 102 Date due: March 8, 2015 The wrongly accused Introduction: Despite the growing consciousness of a flawed criminal justice system, many cannot identify with being wrongfully convicted, weakening public demand for change. Nevertheless, reforms designed to reduce miscarriages of justice take hold. The issue should not be viewed as a partisan issue but one of vital concern to all criminal justice stakeholders and the public. A leading wrongful conviction authority outlines the matter. Wrongful Conviction and Criminal Justice Reform Wrongful Conviction and Criminal Justice Reform, making justice is not a compendium of what has been learned about wrongful convictions since†¦show more content†¦They initially presented their findings in the mid-1980s. Less than a decade later, stories of wrongful conviction poured forth as DNA exonerations provided proof that the innocent had been imprisoned. Some of the investigations were done by journalists, including David Protess, his students at Northwestern University, as well as teams of reporters at papers like the Chicago Tribune. Other work was conducted by academics, including such luminaries as Sam Gross, Richard Leo, and Brandon Garrett. And, of course, the innocence project, led by law professors and advocates Barry Scheck and Barry Neufeld, has uncovered case after case of wrongful conviction. Certainly, the studies of wrongful conviction have been able to generate press coverage especially when the findings tell the story of an innocent defendant who narr owly escaped a death sentence. Due to the fact that much of the American public assumes that it is not at risk for a wrongful conviction, few of those stories have â€Å"legs† to breed sufficient interest in reform. In this assumption the public is correct. Notwithstanding the claims of some reformers that anyone of us could be subject to a wrongful conviction, the research actually suggests that most individuals have little to fear. Indeed, the most recent national study of wrongful convictions shows that individuals with a prior criminal record are at the greatest risk of being wrongful convicted (Gould et

Working Poor in America Free Essays

string(118) " the minimum wage is unlikely to be able to afford such a tuition bill for one child, let alone two or more children\." Working to be Poor in America A single mother of three works two jobs at minimum wage can survive only if she takes advantage of food stamps and lives with a roommate to help pays the bills. This is the case with most of the â€Å"working poor† in America. In 2006, a family of four with one minimum-wage earner had a total income (including food stamps and the Earned Income Tax Credit) of $18,950, some $1,550 below the poverty line. We will write a custom essay sample on Working Poor in America or any similar topic only for you Order Now America is one of the richest countries in the world and yet according to the US Census Bureau, in 2010 21 million of its population lived in working-poor families. This translates into nearly 9. 6 percent of all American families living below 100 percent of poverty have at least one family member working. How can this be? Some people believe that the workers are to blame; they believe that it is the workers’ lack of ambition and drive to better themselves that causes them to be in such dire conditions. While this might be true in very few cases, I don’t believe that it paints the entire picture as to why there could be a â€Å"working poor† class in America. Despite what society may think, the â€Å"working poor† exists because they are subjected to minimum wage, insufficient hours, layoffs, lack of skills, expensive health care and childcare, and inadequate housing. Society throws so many curve balls at low-wage workers that it has become very nearly impossible for them to transcend their situations. One common misconception is that the answer to poverty is to get a job. We assume that if someone is hungry, it is because they are unemployed and are living on the streets. The reality is that over 49 million Americans are affected by hunger. Does this mean that they all are jobless and homeless? As the article â€Å"25 million depend on emergency food assistance† reports, about one-third of the adults between the ages of 18 and 65 needing emergency food-aid are employed. Thirty-six percent of all families seeking assistance reported that at least one family member was working. As Michelle Conlin and Aaron Bernstein explain, today more than 28 million people, about a quarter of the workforce between the ages of 18 and 64, earn less than $9. 04 an hour, which translates into a full-time salary of $18,800 a year—the income that marks the federal poverty line for a family of four. â€Å"The Working Poor Are Not Getting By in America†) The Census Bureau lists that overall 63% of U. S. families below the federal poverty line have one or more workers. How is it that such a large percentage of the U. S. population can be considered as poor or hungry? Is it that all these people lack ambition or is it society that places the burden of poverty on these workers? The primary and main reason for the rut the â€Å"working poor† find themselves in is the minimum wage. While profits and productivity soar in today’s economy, the minimum wage hasn’t kept pace with inflation. Opponents of a raise in the minimum wage often make dire predictions about supposed adverse impacts on employment rates and the economy. But study after study shows that there is simply  no  evidence that raising the minimum wage has led to higher unemployment, and there is substantial evidence that a responsible minimum wage increase does not affect employment rates at all. According to the New York Times editorial Board, if the minimum wage had kept pace with the rise in executive salaries since 1990, America’s poorest paid workers would be making more than $23 an hour. In 1956, the federal minimum wage was a dollar an hour; that same dollar when adjusted for inflation would be $10. 55 an hour in today’s dollars, instead today the actual federal wage is $7. 25 and for tipped workers a dismal $2. 13. This amounts to about $1. 50 an hour less, in today’s money, than it did in 1968. In â€Å"Raising the minimum wage will reduce poverty† it states that even with a $7. 25-an-hour minimum wage, a family of five with a full-time, minimum-wage earner that receives food stamps and the refundable tax credits would fall $1,139 below the poverty line in 2009. In the past 30 years, Congress has passed legislation to increase the minimum wage exactly 3 times. With politicians and employers fighting furiously to keep this minimum wage down, low-wage workers are forced to work two, sometimes even three jobs in addition to depending on government handouts in order to barely get by. While their income is kept at a minimum, their expenses continue to soar: health care, child care, gas prices, housing, the list goes on. The cost of living has been constantly rising for years while the minimum wage lags behind. The number of people who lack health insurance is about 49. million. In 2010, the percentage of people who had health insurance through their employers fell to 55. 3% while 31% of Americans relied on the government for health insurance. (Les Christie) However, while most children in families with a full-time minimum-wage worker are eligible for free or low-cost health insurance through Medicaid or the State Children’s Health Insuranc e Program, their parents are not. In fact, according to the Census data, in 25 states a parent in a three-person family with a full-time, minimum-wage job earns too much to qualify for Medicaid. As a result, about 41 percent of all parents with incomes below the poverty line were uninsured in 2005. In addition to this, many working poor families face significant childcare costs. According to the National Association of Child Care Resource and Referral Agencies, in the median state in the 2004-2005 academic year, full-time infant care in a licensed child care center cost an average of $7,100 per year, while full-time care for preschoolers in a licensed child care center cost an average of $5,800. Without a child care subsidy, a family earning at or near the minimum wage is unlikely to be able to afford such a tuition bill for one child, let alone two or more children. You read "Working Poor in America" in category "Papers" Housing cost burdens for poor families are often severe. Expenditures on public housing have fallen since the 1980s, and expansion of public rental subsidies came to a halt in the mid-1990s. Actual rents have to be less than 30% of one’s income to be considered ‘affordable’. Ehrenreich 201) Housing analyst Peter Dreier reports that 59% of poor renters, amounting to a total of 4. 4 million households, spend more than 50% of their income on shelter. (38) Nationwide, the average cost of a modest two-bedroom apartment in 2006 was $821 per month, or $9,852 per year, according to the U. S. Department of Housing and Urban Development (HUD). At this cost, rent and utilities consume nearly half (48 percent) of the income of a family of four at th e poverty line. This calculation assumes that the family receives food stamps, the EITC and child tax credit. ) Rising rents are forcing the low-wage workers into motels with fluctuating prices for the winter season and tourist seasons. By relying on the minimum wage, basic necessities such as health care and home-ownership have now become a luxury to the â€Å"working poor† – a distant dream that can never be realized. We would assume that there is adequate support for the â€Å"working poor† through government handouts, but even this system is flawed. Throughout the nation soup kitchens and food pantries are stretched beyond capacity, struggling and failing to meet new need, much of it from working people whose wages simply haven’t kept up. Barbara Ehrenreich in her book Nickled and Dimed reveals through her own experience as a low-wage employee just how difficult it is to receive help from the government and charity organizations and how limited these options are. You would need to dedicate a significant amount of your time and energy to locate these options and even when you do manage to get in touch with the â€Å"right person† the help received can be useless. As a low-wage worker, where every hour of your time is money spent, devoting this amount of time to looking for government aid is a luxury as well. Therefore, they are prevented from receiving the little assistance available to them. Most of the time, they do not even qualify for welfare because of the low-wage paying job that they have, even though they desperately need the assistance. Therefore, who or what do we blame for the devastating conditions of the â€Å"working poor† in our society? If there was a clear cut answer to this question, then maybe this question would never need to be asked. We would just point a finger and work on getting the problem fixed. Society strips the â€Å"working poor† of their dignity, self-worth, self-respect and pride and leaves them naked to suffer these physically demanding, dead-end jobs where they are paid next to nothing and in the end, still condemned because they are thought of as lazy parasites that put a strain on society through their addictions and their insistence on reproducing in unfavorable circumstances. Society is quick to judge these individuals and disapprove of their actions when in reality it is society’s fault that these people must depend on such things as welfare in order to minimally survive. According to Furman and Parrot in â€Å"Raising the minimum wage will reduce poverty†, raising the minimum wage would be an important first step and a useful complement to public policies like the EITC, food stamps, and child care subsidies, which provide additional benefits and supports for low-income working families. They believe that a broader agenda is needed, however, to raise the prospects of low-wage workers and their families more significantly. Such an agenda would need to include additional income supports, help in obtaining the health care, child care, and housing that these families need but often cannot afford, and new opportunities to attend college or upgrade their skills so they can secure higher paying, more stable jobs. Works Cited â€Å"25 million depend on emergency food assistance. † Policy Practice June 2006: 7. Academic OneFile. Web. 22 June 2012. Bureau of Labor Statistics. United States Department of Labor. May 2012. Web. 21 June 2012. Christie, Les. â€Å"Number of people without health insurance climbs. † CNN Money. Cable News Network 2012. Web. 21 June 2012. Conlin, Michelle, and Aaron Bernstein. â€Å"The Working Poor Are Not Getting By in America. † Poverty. Ed. Viqi Wagner. Detroit: Greenhaven Press, 2007. Opposing Viewpoints. Rpt. from â€Å"Working †¦ And Poor. † Business Week (31 May 2004). Gale Opposing Viewpoints In Context. Web. 0 June 2012. Dreier, Peter. Why America’s Workers Can’t Pay the Rent. Dissent 47 (3). Summer 2000. Ehrenreich, Barbara. Nickel and Dimed: On (Not) Getting By in America. New York: Henry Holt and Co, 2001. Print. Furman, Jason, and Sharon Parrot. â€Å"Raising the Minimum Wage Will Reduce Poverty. † Poverty. Ed. Viqi Wagner. Detroit: Greenhaven Press, 2007. Opposing Viewpoints. Rpt. from â€Å"A $7. 25 Min imum Wage Would Be a Useful Step in Helping Working Families Escape Poverty. † www. cbpp. org. 2007. Gale Opposing Viewpoints In Context. Web. 22 June 2012. Jeff Chapman. â€Å"Employment and the Minimum Wage: Evidence from Recent State Labor Trends,† Economic Policy Institute, 2004. And in one of the most compelling studies, David Card and Alan B. Krueger find that the 1992 New Jersey state minimum wage increase had no negative effect on employment in New Jersey’s fast-food industry. David Card and Alan Krueger, â€Å"Minimum Wages and Employment: A case study of the fast-food industry in New Jersey and Pennsylvania,† American Economic Review, vol. 4 (4), 772-793, 2004. Pimpare, Stephen. â€Å"Welfare Reform Has Increased Poverty. † Poverty and Homelessness. Ed. Noel Merino. Detroit: Greenhaven Press, 2009. Current Controversies. Rpt. from â€Å"Why Welfare Reform Has Failed. † ZNet. 2004. Gale Opposing Viewpoints In Context. Web. 22 June 2012. RaisetheMinimumWage. com. National Employment Law Project. June 2012. Web. 21 June 21 2012. Rhoda Cohen, J. , Mabli, F. , Potter, Z. , Zhao. Hunger In America 2010. Feeding America. February 2010. How to cite Working Poor in America, Papers

Crude Distillation Unit free essay sample

We have kept discussion in this section brief to focus more on our Project ‘Heat exchange and integration in CDU ’. The main report is divided into 4 sections. To start with, the first Section is a basic introduction to Crude distillation unit, its process and products. Heat exchange is among the most important activity for crude distillation units. The 2nd part of the report focuses on this heat exchange process occurring in the crude distillation unit of Guwahati refinery. Necessary data regarding all the heat exchangers has been provided in a tabular manner to make understanding easier. The concept of critical heat exchanger is introduced subsequently in the 3rd section along with the case study of some important heat exchangers of the process. Heat duty other calculations presented in this section for heat exchangers are clearly explained in step by step manner along with formulas used. Through these calculations we have tried to analyze whether these exchangers are working efficiently. In the Last part of the report we have given an introduction to ‘heat integration’ one of the most important tool for increasing energy efficiency of a process. Points discussed about heat integration in this section are: Meaning, Importance, its need in CDU, Tools. We have concluded this part with an example of heat integration done in 2010 in pre-heat train of CDU, showing how it helped saving energy increasing efficiency. A final conclusion and glossary are provided to sum up the report. We hope you have a good time reading this report and find it informative and useful. Mudit, Amanpreet Rishu Birla Institute of Technology Science Pilani 333031 2 ACKOWLEDGEMENT A comprehensive report always requires the goodwill, encouragement, guidance and support of many people so we would like to start by thanking our college BITS pilani for initiating program like ps-1 thereby giving us the opportunities to visit real time industries and learn by working on hand in organizations as big as IOCL. Our sincere thanks to Mr. B K Das, CPNM and Mr. P S Sonowal for assigning us this important project on heat integration in refinery and getting us in contact with the required person in each unit. Without their help this whole program would not have been possible. We are indebted by the constant support and mentoring provided by Mr. Vijay Kumar, TS for the preparation of this report. Also, we take this opportunity to thank all the chief engineers, and workers we have met in different units who have received us with open hearts and helped us in learning the vast array of knowledge that a refinery holds. Mr. E Edmund of CDU, Mr. A. Bairagi of OMS are just the few of these names with whom we shared numerous informative talks which finally went into the preparation of this report. We also express our deep sense of gratitude to IOCL administration for providing us with necessary data nd making our stay a pleasant one. Thanks to our families friends for their constant support and encouragement throughout the period of preparation of this report. It goes without saying that we are sincerely grateful to our instructor, Mr. Prasantha G for coordinating this ps-1 program and giving us opportunity to present before him this report. Thank you all Birla I nstitute of Technology Science Pilani 333031 3 TABLE OF CONTENTS S No. Topic Page No. Preface Acknowledgement List of Illustrations Abstract 2 3 5 1. 1 1. 2 1. 3 Introduction IOCL Guwahati refinery Production Units of Guwahati refinery 6 7 8 9 2. 1 Crude Distillation Unit CDU : Process Description 11 3. 1 3. 2 3. 3 CDU Pre-heat Train (Heat exchange Process) Introduction Shell tube Heat exchanger Pre-heat train : Description 15 16 17 Heat Exchanger Performance Calculation Critical heat exchangers Performance analysis: Examples ? S-25A/B ? S-11C ? S-23A/B 22 23 23 25 27 Heat Integration Heat Integration : Introduction Heat Integration in CDU ? Need for heat integration in CDU ? Heat integration in Guwahati Refinery ? Example from pre-heat train 30 32 32 32 33 Conclusions References Bibliography Glossary 35 36 37 38 4. 1 4. 2 5. 1 5. 2 Birla Institute of Technology Science Pilani 333031 4 LIST OF ILLUSTRATIONS ILLUSTRATION NO. DESCRIPTION 1. 2. 1 1. 3. 1 IOCL Indian market share Table showing Production units 2. 1. 1 2. 1. 2 CDU flow diagram Table Showing CDU product properties 3. 2. 1 3. 3. 1 3. 3. 2 Types of Shell Tube heat exchanger Pre-heat train flow diagram Table Showing cold section heat exchangers Table Showing mid section heat exchangers Table Showing hot section heat exchangers 3. 3. 3 3. 3. 4 4. 2. 1 – 4. 2. 3 4. 2. 4 – 4. 2. 6 4. 2. 7 – 4. 2. 7 5. 1. 1 5. 2. 1 5. 2. 2 Properties, Design data, Practical data of S-25A/B Properties, Design data, Practical data of S-11C Properties, Design data, Practical data of S-23A/B Steps of Heat Integration Heat integration in Pre-heat train S-11/c before after heat integration Birla Institute of Technology Science Pilani 333031 5 ABSTRACT Title of the Project: CDU: HEAT EXCHANGE INTEGRATION Key Words: Crude distillation, Heat exchange, Heat integration, CDU-Pre heat train Project Areas: Heat exchange, Process design optimization, Energy Abstract: In this work is on Crude distillation unit in a refinery discusses the heat exchange process in it and introduction of the concept of heat integration which is of wide importance in CDU. CDU is used for crude fractionation and requires a temperature of 354 oC. To increase the temperature of crude 2 step process is used; heat exchange with product streams furnace. In the shell tube type heat exchangers of Guwahati refinery Low temperature crude exchanges heat with high temperature streams of SRGO, RCO etc. in 3 stages(cold , mid, hot). The performance of some of these heat exchangers have a major impact on production and are classified as Critical on the basis of different criteria like frequent fouling, Large surface area. Calculation of heat duty, LMTD of some of these heat exchangers(s/15, S/23a-b,s-24) is done using design practical data to check whether they are working efficiently as compared to design. Heat integration is an important concept to increase energy efficiency of process through heat recovery. Tools like pinch analysis are used in high energy demanding units like CDU to optimize the Heat Exchanger Network for maximum efficiency. Analysis of past heat integration done in Pre heat train of CDU is taken as an example for analysis. Signature(s) of Students(s) Date Signature of PS Faculty Date Birla Institute of Technology Science Pilani 333031 6 1. 1 INTRODUCTION This Report is an analysis of the one of the most key elements of any crude distillation unit i. e. ‘Heat Exchange’ ‘Heat integration’. The report is based on Work in CDU of Guwahati refinery. Crude distillation units are used for the fractionation of crude into more valuable products using their difference in boiling points. Increase in temp for distillation us achieved in 2 steps; first step is the heat exchange of crude with product streams at high temperatures. In the next step a furnace is used to further elevate the temperature. Our main point of discussion in this report is the first step of heat exchange called the Pre-heat train. The pre-heat train consists of 3 sections: Cold, Mid hot. The purpose of each section is to recover heat from hot product stream of RCO, SRGO etc and supply it to crude through a shell-tube type heat exchanger. The details about various heat exchanger used in process are presented in the report. Performance of some heat exchanger is more critical on overall heat exchange than others; these heat exchangers are classified as Critical heat exchangers. Constant monitoring of efficiency of these heat exchangers needs to be done. As Example calculations like heat duty, LMTD is done in this report for some of these critical heat exchangers (S-11C, S-23A/B) to check their efficiency. Crude distillation is an energy intensive process. With increasing oil costs, the focus is to maximize energy recovery. One way to do this is heat integration which is a technique to design a process to minimise energy consumption. Tools like pinch analysis are used for obtain an optimized heat exchanger network for heat integration in CDU. The retrofitting of the HEN in CDU is taken as case study in report to realize importance of heat integration. Meaning of all the key terms used in the report can be found in the Glossary. Necessary data used in the report has been obtained through manuals officials of Guwahati refinery. Birla Institute of Technology Science Pilani 333031 7 1. 2 IOCL GUWAHATI REFINERY ? IOCL Indian Oil Corporation limited is largest state owned company in terms of revenue having ‘Maharatna’ status. It is ranked 98th in the Fortune global 500 listing. It’s biggest player in Indian downstream oil Gas sector and operates10 of Indias 21 refineries with refining capacity of 65. 7 MMTPA. Major ones are Panipat, Mathura, Guwahati, Gujrat, Haldia etc. Its products are Petrol, Diesel, LPG (Indane), ATF, lubricants, Naphtha, Kerosene etc. (1. 2. 1) Sector (India) IOCL Share Petroleum products 49% Refining capacity 37% Downstream pipelines 67% ? Guwahati Refinery Guwahati refinery is the first public sector refinery of India commissioned in 1962. It had an initial capacity of 0. 75 MMTPA which was extended to 1 MMTPA in 1986. Guwahati Refinery receives the raw crude from Oil India Limited has a product line to Siliguri. Final products of Guwahati Refinery are Motor spirit (MS), ATF, Kerosene, LPG, Diesels, Petroleum Coke Elemental Sulphur. It’s an environmentally Conscious refinery with modern effluent treatment facilities, Stack gas monitoring, Products with strict environmental specifications like BS-3 BS-4. Birla Institute of Technology Science Pilani 333031 8 1. 3 PRODUCTION UNITS ? Shown below in the table are the various production units of Guwahati refine ry along with their use, feed products(1. 3. 1): Unit Purpose Feed Output CDU Separation of Crude into useful products by distillation. Raw Crude LPG , Naphtha, RCO, Kero-1 2 DCU Thermal Cracking to obtain useful products from higher ends RCO CK, CGO, CFO, RFO and RPC HGU Production of hydrogen Light Naphtha (LN) Hydrogen INDMAX FCC unit for maximizing LPG production from residual stocks. CFO, CK, RCO LPG Gasoline Quality improvement of Diesel, ATF by removing sulphur. SRGO, KERO 1 2 BS 3 Diesel, ATF, SKO HDT Improving Octane No. of MS by Hydrotreating Isomerization LN Isomerate (MS) HDT off gases Elemental Sulphur _ _ Waste water Effluent free water MSQU Recovering Sulphur SRU OMS ETP Crude product storage, Pumping blending Treatment of waste water to remove oil and suspended solids Birla Institute of Technology Science Pilani 333031 9 CRUDE DISTILLATION UNIT Birla Institute of Technology Science Pilani 333031 10 2 CDU: Process Description INTRODUCTION Crude distillation unit or CDU in short is first most important unit for any refinery. It’s called the ‘Mother unit’ as its products forms the feed of other units. CDU receives its crude from OMS (oil movement and supply section) where it is supplied by Oil India Ltd from upper Assam oil fields. Incoming crude has following properties (2. 1. 1): Property Density at 15 oC Water content Salt content(ppm) Sulphur content(ppm) Value 0. 8735 2. 05% 8. 7 0. 29 CDU then stripes the crude into various products like kero1, kero2, reduced crude oil, LPG, heavy gasoline and light gasoline using the distillation principle of difference in boiling points. KEY FACTS ? ? ? Installed in 1962. Revamped and modernized in 1986 2000. Capacity of 1MMTPA but currently processing 1. 3 MMTPA It’s an Atmospheric distillation unit (ATU) PROCESS DESCRIPTION A brief description of the different processes taking place in CDU is given on next page (2. 1. 2): 1. Pre heating train before Desalter: Crude is pumped by pumps P1/1A at a pressure of 15 kg/cm2 through a series of heat exchangers where its temperature is elevated to 130o C. Crude is gaining heat in these exchangers from pre fractionated overhead vapours(in s-26), RCO( in s-29), SR Kero1 etc. Birla Institute of Technology Science Pilani 333031 11 2. Desalter: Demulsifier mixed crude is fed at 130 o C to Desalter (v-101) where it is mixed with water through a mixing valve. The salt in crude dissolves in water and separated from the oil. Salt free crude on the other hand is pumped to Pre-topping column (CL-1) though 2 safety valves. 3. Pre-topping Column (CL-1): The average temperature of crude before entering pretopping column is 238 oC (achieved through heat exchange). The purpose of this column is to remove the straight run (SR) light gasoline and LPG from overhead and reduce the load on the main fractionating column. Shown below is the Flow diagram of CDU(2. 1. 1): 4. Atmospheric furnace (C 1 A): the crude coming from CL-1 bottom at 246 oC is fed to furnace. Furnace is fired by fuel oil (FO), Fuel gas (FG) or a mix of both supplied by DCU. The crude coming out of the furnace has a temperature of around 354 oC and goes to the flash zone of main fractionators’ column. 5. Main Fractionators column (CL-2): It’s the most important part of CDU. Cl-2 is where the actual distillation is taking place crude is separated into different products of different cut. Stripping stream enters at the bottom. The various subsystems of CL-1 are: Birla Institute of Technology Science Pilani 333031 12 a) Overhead system: The overhead of the column of the water and the Straight rum Heavy Gasoline (SRHG) are separated. b) Stripper column: A stripping column (CL-3) is attached to the main fractionating column . Its function is to strip apart (separate) kero1, kero 2 and straight run gas oil coming from main fractionating column. ) CL-2 Bottom Section: The remaining crude oil called as the reduced crude oil (RCO) comes out of the bottom of CL-2. RCO forms the feed of DCU 6. Light Gasoline /Heavy Gasoline Processing System: Un-stabilized light gasoline from CDU pre-toping column is stabilized in the stabilizer where LPG is recovered from it while heavy gasoline is spl it in the two naphtha splitter to separate LN (Light Naphtha), RN (Reformer Naphtha) and HN (Heavy Naphtha). The table below shows properties of the Products formed in the CDU(2. 1. 2): LN TBP cut HN Kero 1 Kero 2 SRGO RCO 65-135 135-165 165-190 190-300 300-370 370+ 11. 27 4. 90 8. 16 12. 11 22. 16 9. 7 0. 731 0. 786 0. 806 0. 866 0. 866 0. 9542 range Yield (% of crude) Density Birla Institute of Technology Science Pilani 333031 13 CDU PRE-HEAT TRAIN (HEAT EXCHANGE IN CDU) Birla Institute of Technology Science Pilani 333031 14 3. 1 INTRODUCTION As we have seen the temperature of the Crude oil needs to increase to 354 oC in CDU. This section is a discussion on how this is achieved. Why Crude needs to be heated in CDU? The various components of crude oil have different sizes, weights and boiling temperatures. Crude Distillation Unit is used to strip this crude into various products using the difference in their boiling points. Therefore for distillation to take place the temperature of the Crude has to be elevated to around 354 oC so that all the fractions of crude oil can vaporize and get separated. How Temperature of Crude is increased in CDU? The Temperature increase of Crude oil consists of 2 major steps: 1. A 3 Stage Heat exchange (called CDU pre-heat train) of crude with product streams at high temperatures using shell tube type heat exchangers. This step results in crude being supplied at 246 oC (elevated from ambient) to the next step ‘The atmospheric Furnace’. 2. The atmospheric furnace (C-1A) is then used to further elevate the temperature. Modes of heat transfer in furnace are both convective and radiative the crude coming out of the furnace has a temperature of around 354 oC and goes to the flash zone of main distillation column (CL-2). Furnace alone is not used because it would to too expensive and Energy consuming. By exchanging heat with products, the pre-heat train is serving twin purpose; The Crude is being heated at the same the temperatures of product streams of SRGO, RCO, KERO is brought down which was needed for their storage. This heat would have otherwise been wasted. Our point of discussion in this report is the First step i. e. The Heat exchanger Network’ which we will now study in detail. Birla Institute of Technology Science Pilani 333031 15 3. 2 SHELL TUBE HEAT EXCHANGER The Pre heat train uses shell tube type heat exchager for heat transfer. ? It consist of two main things as its name implies Shell Tubes ? The shell is a large vessel with a number of tubes inside it. ? The principle of oper ation: Two fluids of different temperatures are brought into close contact but they are not mixing with each other. One fluid runs through the tubes, and another fluid flows over the tubes (through the shell) to transfer heat between the two fluids. The temperature of the two fluids will tend to equalize. The heat is simply exchanged from one fluid to the other and vice versa. No energy is added or removed. Common types of shell and tube exchangers: Birla Institute of Technology Science Pilani 333031 16 3. 3 PRE-HEAT TRAIN: Description Our point of discussion in this report is first step of the 2 stages used for raising the temperature of crude i. e. the Heat exchanger network in which heat transfer occurs between crude and product streams of RCO, SRGO, and Kero 1. This network is also called the CDU pre-heat train. In this process the temperature of the crude is elevated form ambient conditions at which it is supplied from OMS to 246oC. The heat needed for this is coming from the product streams which are at high temperatures. Dual purpose is served in this way: heating of crude as well as the cooling of product streams (needed for their storage). The pre-heat train is divided into three sections on the basis of temperature of crude flowing through them: 1. COLD section 2. MID section 3. HOT Section Shown below is the flow diagram of the CDU pre heat train (3. 3. 1): Birla Institute of Technology Science Pilani 333031 17 1. Cold Section (before Desalter): The crude from battery limit is pumped by pumps P-1/1A at about 15. 8 Kg/cm2 through a preheat train where it is heated to a temperature of 130 ? C before entering the Desalter (V-101). The following table shows the shell side tube side streams of all exchanger in this section along with their inlet-outlet temperatures (3. 3. 2):Exchanger Service Shell Tube Total Surface area Heat Duty Temperature shell tube I O I O S-26 Gasoline Crude 300 x 1 2. 11 107 90 40 65 S-29 RCO Crude 171 x 1 0. 47 116 100 54 60. 3 S-12A Crude Kero 2 148 x 1 0. 92 60. 3 72. 6 130 82 S-27A/B Crude SRGO 183 x 2 1. 39 72. 5 0. 3 173 85 S-7 Kero 2 Crude 93 x1 1. 48 199 130 90. 3 109 S-11A/B RCO Crude 134 x 3 1. 49 165 115 109 122 2. Mid Section (Between Desalter and pre-topping column): The crude from the Desalter is pumped by pump P-21 A/B and divided equally into 2 streams (Train A B) for further heating before entering the Pre-topping column. P-21A/B? Train â€Å"A†: S -24, S-9A, S-23A/B, S-9B/C, S-22 CL-1 Train â€Å"B†: S-4A/B, S-12B, S-25A/B The crude in train A is preheated by hot-streams of SR Gas Oil (in S-24), RCO (in S-9A, S-23A/B), SR Gas Oil (in S-9B/C), RCO (in S-22) to about 236 ? C. While the crude in Birla Institute of Technology Science Pilani 333031 18 train B is preheated by SR kero circulating Reflux (CR) (in S-4A/B, S-12B) and RCO (in S-25A/B) to about 240 ? C. Desalted crude from both Train A and Train B streams are combined before entering the pre-topping column. Mixed preheat temperature achievable is around 238 ? C at which it is fed to pre-topping Column. Below is the table showing heat exchangers of mid section (3. 3. 3) Exchanger Shell Service Tube Total area Surface Heat Duty Temperature oC Shell Tube I S-9A Desalted Crude RCO S-23A/B RCO S-9B/C SRGO S-22 RCO S-4A/B Desalted Crude Desalted Crude RCO S-24 S-12B S-25A/B O I O SRGO 0. 0 122 138 214 173 Desalted Crude Desalted Crude Desalted Crude Desalted Crude Kero CR 149 x 1 0. 61 184 195 138 152 148 x 2 1. 93 241 184 153 195 82 x 2 0. 54 272 214 195 218 149 x 1 0. 91 320 296 218 236 148 x 2 1. 67 122 161 190 164 Kero CR 148 x 2 1. 8 161 198 216 190 Desalted Crude 113. 15 x 2 2. 0 297 283 228 223 3. Hot Section (At CL-1 Bottom): The topped crude from CL- 1 bottoms is pumped by pumps P-2/2A to exchangers S16/S-9D in series, where it is heated by SR Gas Oil Circulatory reflux. It then passes to exchanger number S-11C and further to S-21 where it is heated by Reduced Crude Oil (RCO) to about 246? C. At this Temperature pre topped crude enters Atmospheric furnace (C-1A). The table on next page gives details about every heat exchanger in this section (3. 3. 4). Birla Institute of Technology Science Pilani 333031 19 Exchanger Service Shell Total area Surface Heat Duty Tube Temperature oC Shell Tube I S-16/9D SRGO CR S-21 RCO S-11C RCO Skimmed crude Skimmed crude Skimmed crude O I O 186 x 2 2. 16 291 250 197 257 175 x 1 0. 61 336 320 239 246 134 x 3 1. 49 336 320 239 246 Birla Institute of Technology Science Pilani 333031 20 HEAT EXCHANGER PERFORMANCE CALCULATION Birla Institute of Technology Science Pilani 333031 21 4. 1 CRITICAL HEAT EXCHANGER The critical heat exchangers are identified as the ones whose performance has a major impact on heat exchange rate, Production rate, product quality or environmental and health issues. Problem or inefficiency in any of the critical exchanger has a severe effect on overall heat exchange process occurring in the crude distillation unit. The engineers need to see that these exchangers are working efficiently for smooth running of the process (Though efficiency monitoring is important for every exchanger but the most attention has to be paid for Critical heat exchangers). Criteria for Classification: 1. Fouling: is accumulation of unwanted material of heat exchanger surface is called fouling. Fouling is inevitable in heat exchanger but certain heat exchangers are more prone to fouling than others. These exchangers foul in short intervals and need to be cleaned frequently. Their regular maintenance is very necessary for the heat exchange process. E. g. is S-11/C in hot section is prone to frequent fouling. 2. Large surface area: Some heat exchanger have a very large heat transfer area which means they have a large contribution in total heat exchange taking place. Their inefficiency or by-passing them would have a vital effect of final crude temperature. For example S-23 A/B in the mid section of heat exchanger trains. 3. Single heat exchanger in line: If a heat exchanger is single heat exchanger in the line like the one used in circulating reflux then it cannot be stopped or by-passed. For any maintenance work on them the whole unit has to shut down. Example is S16/9D. In next section the basic performance measurement calculations like heat, Duty, LMTD, Heat transfer coefficient is done for some of these critical heat exchangers. Birla Institute of Technology Science Pilani 333031 22 4. 2 PERFORMANCE ANALYSIS: Examples This section analyzes the performances of some main heat exchangers of pre-heat train through calculation of simple performance measurement tools like Heat duty, LMTD Heat transfer coefficient. The definitions formulas for these tools can be found in glossary at the end of the report. 1) S-25 A/B ? Type: Shell tube ? Section: Mid ? Properties: Exchanger no. S-25A/B Service Shell No. of passes Shell Tube Tube RCO Desalted Crude 1 2 Total Surface area Heat Sq. M x no. of Duty element 113. 15 x 2 2. 0 (4. 2. 1) ? Design Data: Shell 54554 55454 296 241 (I) (O) 49. (uncorrected) Total flow (Kg/h) Operating temperature (? C) LMTD (? C) Tube 77586 77586 197. 7 240. 5 (I) (O) 47. 1 (corrected) (4. 2. 2) ? Practical data: Mass flow rate (RCO) = 59187. 5 Kg/hr S-25A/B Service Temperature,  °C Shell Tube Post MI Shell side I 297. 5 O 283. 7 Tube side I O 231. 9 245 Nov 11 Exchanger No. 263 253 198 RCO crude 203 (4. 2. 3) ? Calculations: 1. Heat Duty (design): M*Cp*(Ti –To) = 2002813. 7 Kcal/hr Birla Institute of Technology Science Pilani 333031 23 2. Heat Duty (practical): 559336 Kcal/hr 3. Correction factor for LMTD (practical): 1. 01 4. LMTD (practical): 52. 12 (uncorrected), 51. 7(corrected) ? Observation The practical heat transfer of 559336 Kcal/hr is much lower than the design heat duty of 2002813. 7 Kcal/hr. ? Conclusions 1. The exchanger is not working efficiently 2. Due to fouling the temperature difference across the crude side is low which is reducing the total heat exchange in the exchanger. Birla Institute of Technology Science Pilani 333031 24 2) S-11/C ? Type: Shell tube ? Section: Hot ? Properties: It’s a critical heat exchanger because of the frequent fouling Service Exchanger no. Shell Tube S-11C RCO PreDesalter No. of passes Shell Tube 1 2 Total Surface area Sq. m x no. of lement 134 x 3 Heat Duty 1. 49 (4. 2. 4) ? Design data: Shell Tube Total flow (Kg/h) 54554 55454 155171 Oper ating temperature (? C) 336 (I) 320 (O) 239 (I) LMTD (? C) _ 1551 71 246 (O) _ (4. 2. 5) ? Practical data: Mass flow rate: 59871. 5 Exchanger No. S-11C Service Shell Tube RCO Skimmed Crude Post MI Nov ‘11 Temperature,  °C Shell side Tube side I O I O 327 315 257. 8 263 330. 2 275 231 255 (4. 2. 6) Birla Institute of Technology Science Pilani 333031 25 ? Calculations: 1. Heat Duty (design): M*Cp*(Ti –To) = 6295320 Kcal/hr 2. Heat Duty (practical): 597382. 7 Kcal/hr 3. Correction factor for LMTD(practical) = 0. 75 4. LMTD (practical): 82. 84 (uncorrected), 80. 79(corrected) ? Observations: Heat transfer at present is 597382. 7 Kcal/hr which is satisfactory as compared to design heat transfer of 6295320. ? Conclusions: The present performance of the heat exchanger is satisfactory as compared to design. This little variation in the design heat duty and practical heat duty is due to variation in value of Cp of RCO with temperature. Birla Institute of Technology Science P ilani 333031 26 3) S-23A/B ? Type : Shell Tube ? Section: Mid (Train A) ? Properties: It is an critical heat exchager becase of its large heat transfer area Service Total Surface area No. of passes Shell Tube Shell Tube (Sq. m x no. of element) RCO Desalted Crude 1 2 148 x 2 Heat Duty 1. 93 (4. 2. 7) ? Design Data: Property Shell Tube Total Flow (Kg/h) Temperature (? C) I 54554 241. 0 O 54554 184. 0 I 77585 152. 70 O 77585 195. 0 Specific Heat (Kcal/kg-? C) 0. 646 0. 597 0. 566 0. 617 LMTD (? C) 38. 21 35. 6 (4. 2. 8) ? Practical data: Mass flow rate (RCO) = 59187. 5 Kg/hr Temperature  °C Service Shell RCO Tube crude Shell side Post MI Nov ‘11 Tube side I 260. 2 O 230 I 145. 7 O 178. 8 253 230 142 160 (4. 2. 9) Birla Institute of Technology Science Pilani 333031 27 Calculations: 1. Heat Duty (design): M*Cp*(Ti –To) = 1932602. 7 Kcal/hr 2. Heat Duty (practical): 1161000. 7 Kcal/hr 3. Correction factor: 4. LMTD (practical): (uncorrected), (corrected) ? Observations The practical heat transfer of 1161000. 7 Kcal/hr is much lower than the design heat duty of 1932602. 7. The value of LMTD on the other hand is actually higher i n case of practical situation ? Conclusions The heat exchanger is not working efficiently. Due to fouling the temperature difference across the crude side is low which is reducing the total heat exchange in the exchanger even after having a high LMTD value. Birla Institute of Technology Science Pilani 333031 28 HEAT INTEGRATION Birla Institute of Technology Science Pilani 333031 29 4. 1 HEAT INTEGRATION: Introduction In Today’s process industries like Guwahati refinery increasing energy efficiency is of prime importance. With the rising costs of input like crude, power the process has to be designed to have maximum energy recovery so as to reduce the costs. Heat integration is one of the ways to achieve this. 1. MEANING Heat integration is technique for designing a process to minimise energy consumption and maximise heat recovery. Its part of the broader term ‘Process integration’ which is a holistic approach to process design which emphasizes the unity of the process and considers the interactions between different unit operations from the outset, rather than optimising them separately. 2. NEED FOR HEAT INTEGRATION Heat integration can lead to substantial reduction in the energy requirements of a process thus saving costs. It’s the answer to following questions: ? Are the existing processes as energy efficient as they should be? ? What changes can be made to increase energy efficiency without incurring any costs? What is the most important utility mix for the process? What investments can be made to increase energy efficiency? ? How to put energy efficiency other targets like emission reduction, increasing plant capacity into one coherent strategic plan? 3. TOOLS FOR HEAT INTEGRATION ? Pinch Analysis The term pinch technology was introduced by Linnhoff to represent a set of thermodynamics based tools that that guarantee minimum energy levels in design of heat exchanger networks. Pinch Technology provides a systematic methodology for energy saving in processes total sites. Its prime objective is to provide energy saving by better process heat integration. Here are some of its key features: Birla Institute of Technology Science Pilani 333031 30 1. Based on the first and second law of thermodynamics. 2. Pinch analysis is applicable for both new design as well as the retrofit systems. 3. It was developed for crude distillation systems but is now applicable to large number of process industries. 4. In addition to energy conservation Pinch technology provides general improvements 5. Some famous Pinch softwares are Pinch ExpressTM, Aspen PinchTM SuperTargetTM ? Retrofit analysis Retrofit analysis is done to in old process processes to see what modifications suggested by pinch analysis are most suitable for the project. It looks into the optimization of the process through energy capital trade off. In oil refining, retrofit designs are far more common than grass root applications. The retrofit targets are preferably achieved by re-using existing equipment more efficiently rather than installing new equipments and incurring new costs. 4. STEPS IN HEAT INTEGRATION Shown below are the different steps of heat integration (5. 1. 1) Birla Institute of Technology Science Pilani 333031 31 5. 2 HEAT INTEGRATION IN CDU 1. IMPORTANCE OF HEAT INTEGRATION IN CDU Distillation is the largest single energy consumer in the Refinery. Large section of oil is spent in fuelling the CDU itself. It is energy intensive process as the temperature of the crude has to be elevated to a high temperature of 354 oC. This increase in temperature is achieved by exchanging heat in various heat exchangers between crude and streams of RCO, SR Gasoline, Kero 2 etc which are at high temperature. Heat integration focuses on achieving maximum energy recovery from these streams through an optimized HEN so that the crude can be supplied at highest possible temperature to the furnace, thus saving energy. A recent development in distillation technology has shown potential savings of up to 15-40 % through the heat? integrated exchanger network (pre-heat train) distillation column. 2. HEAT INTEGRATION AT CDU GUWAHTI REFINEY What has been done? 1. The basis of heat integration in heat exchange process is putting process hot streams in thermal contact with process cold streams. We have already seen how product hot streams of RCO, SRGO etc at high temperature are used to exchange heat with the crude oil at low temperature. 2. Designing of an Optimized Heat Exchanger Network in pre-heat train using heat integration tools like pinch analysis retrofit analysis in July 2010. This design allows maximum energy heat recovery. What can be done? 1. Using heat integrated distillation columns. HIDC can save energy by recovering excess heat from the rectifying section for usage in the stripping section. Birla Institute of Technology Science Pilani 333031 32 2. Seeing the interactions of HEN and distillation column and applying combined heat integration for whole unit.