裂解急冷水PH值自动控制技术应用
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摘要
pH值在石油化工工业生产中是常见的过程控制对象,但由于其特殊的过程特征,在绝大多数的控制过程中只能处于开环控制或接点控制状态,无法实现连续、精细调节控制目标。这种控制状况,显然不能满足那些对于pH值要求较高的石化生产过程的需要。而由于pH值的波动,可能造成生产过程波动,产品质量不稳,产品产量降低,能耗物耗浪费严重,设备腐蚀和环境污染等情况。
本文简要介绍了采用复杂控制技术,对裂解急冷水的PH值进行自动控制,通过一些先进的技术手段,可以同时将急冷水和相关联的工艺水的PH值,稳定在一定的控制区间内。在避免急冷水PH值过高引起急冷水乳化的同时,减少因急冷水PH值过低对工艺水汽提塔和众多换热器等设备酸性腐蚀的可能性。同时对稀释蒸汽发生器也起到较好的保护作用,为急冷水装置、工艺水汽提装置及稀释蒸汽装置设备的平稳运行提供有效保证,有利于乙烯装置安全的长期稳定运行,并使相关设备的运行寿命延长,从而降低维护保养费用。
改造后的裂解装置急冷水系统PH值自动控制控制系统投产至今,整个控制过程运行连续稳定,控制系统具有较好的鲁棒性,快速性和稳定性,系统具有较强抗干扰能力和系统跟踪能力
pH value of production in the petrochemical industry is a common process control objects, but because of its special characteristics of the process, the control process in the vast majority only in the open-loop control or contact control condition, can not achieve continuous fine-tuning control objectives . This control situation, obviously does not meet those requirements for higher pH values the needs of the petrochemical production process. And because the pH fluctuations can cause fluctuations in the production process, product quality unstable, reduce product yield, a serious waste of energy and material consumption, equipment corrosion and environmental pollution and so on.
This paper describes the use of sophisticated control technology, the PH value of cold cracking emergency automatic control, through a number of advanced techniques, can be associated with acute cold water and process water, PH value, stability control in a certain range. PH value to avoid excessive cold water caused acute and acute cold water emulsion at the same time, reduce the PH value is too low acute cold vapor stripper and a number of process heat exchangers and other equipment, the possibility of acid corrosion. While the dilution steam generator also play a better protective effect for acute cold water installations, process equipment and dilution water vapor to mention the smooth operation of steam plant equipment to provide effective guarantees, will help secure the long-term stability of ethylene plant operations, and related equipment operational life extended, thereby reducing maintenance costs.
After transformation, the cracker PH value of the chilled water system emergency control system of automatic control of production so far, the entire control process continuous and stable operation, the control system has good robustness, speed and stability, the system has strong anti-interference ability and tracking system ability
本文简要介绍了采用复杂控制技术,对裂解急冷水的PH值进行自动控制,通过一些先进的技术手段,可以同时将急冷水和相关联的工艺水的PH值,稳定在一定的控制区间内。在避免急冷水PH值过高引起急冷水乳化的同时,减少因急冷水PH值过低对工艺水汽提塔和众多换热器等设备酸性腐蚀的可能性。同时对稀释蒸汽发生器也起到较好的保护作用,为急冷水装置、工艺水汽提装置及稀释蒸汽装置设备的平稳运行提供有效保证,有利于乙烯装置安全的长期稳定运行,并使相关设备的运行寿命延长,从而降低维护保养费用。
改造后的裂解装置急冷水系统PH值自动控制控制系统投产至今,整个控制过程运行连续稳定,控制系统具有较好的鲁棒性,快速性和稳定性,系统具有较强抗干扰能力和系统跟踪能力
pH value of production in the petrochemical industry is a common process control objects, but because of its special characteristics of the process, the control process in the vast majority only in the open-loop control or contact control condition, can not achieve continuous fine-tuning control objectives . This control situation, obviously does not meet those requirements for higher pH values the needs of the petrochemical production process. And because the pH fluctuations can cause fluctuations in the production process, product quality unstable, reduce product yield, a serious waste of energy and material consumption, equipment corrosion and environmental pollution and so on.
This paper describes the use of sophisticated control technology, the PH value of cold cracking emergency automatic control, through a number of advanced techniques, can be associated with acute cold water and process water, PH value, stability control in a certain range. PH value to avoid excessive cold water caused acute and acute cold water emulsion at the same time, reduce the PH value is too low acute cold vapor stripper and a number of process heat exchangers and other equipment, the possibility of acid corrosion. While the dilution steam generator also play a better protective effect for acute cold water installations, process equipment and dilution water vapor to mention the smooth operation of steam plant equipment to provide effective guarantees, will help secure the long-term stability of ethylene plant operations, and related equipment operational life extended, thereby reducing maintenance costs.
After transformation, the cracker PH value of the chilled water system emergency control system of automatic control of production so far, the entire control process continuous and stable operation, the control system has good robustness, speed and stability, the system has strong anti-interference ability and tracking system ability
引文
[1]于喜安.《乙烯装置急冷水pH值自动化控制改造》[J].中国化工信息网(www.cheminfo.gov.cn)
[2]梵斯.梵多仑博士.《无模型自适应控制》[J].《世界仪表与自动化》杂志2001,(6)
[3]姚伟清,郜维松,王立忠.《先进pH值控制系统在污水预处理单元上的应用》[J].中国自动化协会网站—中国工控网(www.gongkong.com)
[4]张晓军,刘刚.《无模型自适应技术在pH值过程控制中的应用》[J].《中国当代思想宝库》
[5]张秀斌.《裂解炉急冷水乳化问题初探》[J].齐鲁石油化工, Qilu Petrochemical Technology, 1990年03期
[6]高云忠;,袁琳.《急冷水乳化原因分析与预防措施》[J].乙烯工业, Ethylene Industry, 2004年01期
[7]李岩.《急冷水排放量大的分析及解决措施》[J].乙烯工业, Ethylene Industry, 2003年03期
[8]李才付.《控制污水排放推行清洁生产》[J].乙烯工业, Ethylene Industry, 2004年02期
[9]急冷水酸碱度的控制改进朱向东;中国石油抚顺石化分公司;辽宁抚顺;中外能源, China Foreign Energy, 2006年06期
[10]梁博,吴卓新,于喜安,白铁生.《乙烯装置急冷水pH值自动化控制应用》[J]辽宁化工, Liaoning Chemical Industry, 2008年07期
[11]李海周,姜涛.《浅析乙烯装置急冷水和稀释蒸汽发生系统的pH控制》[J].石油化工安全技术, Petrochemical Safety Technology, 2000年06期
[12].杨春生.《乙烯装置节能减排的重点是改造急冷油系统》[J].中外能源, 2009, (05) :101-106
[13]张春利,邹余敏,李强.《稀释蒸汽系统在线切出处理》[J].乙烯工业, Ethylene Industry, 1999年03期
[14]刘玉东,张殿波,安吉洪,魏哲如,严登超.《乙烯装置工艺水水质优化》[J].石化技术与应用, Petrochemical Technology & Application, 2008年03期
[15]孙殿博.《乙烯装置中稀释蒸汽发生器内漏原因及其防护的探讨》[J].乙烯工业, Ethylene Industry, 1994年01期
[16]鲁卫国,李强,章颖颀,王炯.《茂名乙烯装置长周期运转技术探索》[J].乙烯工业, Ethylene Industry, 2005年04期
[17]张延斌.《乙烯装置“节能节水减排”经验介绍》[J].内蒙古石油化工, Inner Mongolia Petrochemical Industry, 2008年09期
[18]张新伟.《加强水质控制减轻设备腐蚀》[J].乙烯工业, Ethylene Industry, 2001年04期
[19]郭英爽,胡海东,孙新民.《大庆乙烯装置稀释蒸汽发生系统存在的问题及处理措施》[J].乙烯工业, Ethylene Industry, 2008年04期
[20] CS1000/CS3000参考功能块编IM33S01B30-01 9版
[21] CS1000/CS300 Engineering Tutorial IM33S04H10-01E 15th Edition
[22] hxchenpengfei .《集散控制系统DCS简介》.海川在线
[23] CS300 FOUNDATION FIELDBUS REGERENCE IM33Y05P10-01E 11TH Edition
[24] CS1000/CS300 CENTUM DATA ACCESS LIBRARY IM33S02T10-01E 6th Edition
[25]张晓军,刘刚.《无模型自适应技术在pH值过程控制中的应用》.中国工控网
[2]梵斯.梵多仑博士.《无模型自适应控制》[J].《世界仪表与自动化》杂志2001,(6)
[3]姚伟清,郜维松,王立忠.《先进pH值控制系统在污水预处理单元上的应用》[J].中国自动化协会网站—中国工控网(www.gongkong.com)
[4]张晓军,刘刚.《无模型自适应技术在pH值过程控制中的应用》[J].《中国当代思想宝库》
[5]张秀斌.《裂解炉急冷水乳化问题初探》[J].齐鲁石油化工, Qilu Petrochemical Technology, 1990年03期
[6]高云忠;,袁琳.《急冷水乳化原因分析与预防措施》[J].乙烯工业, Ethylene Industry, 2004年01期
[7]李岩.《急冷水排放量大的分析及解决措施》[J].乙烯工业, Ethylene Industry, 2003年03期
[8]李才付.《控制污水排放推行清洁生产》[J].乙烯工业, Ethylene Industry, 2004年02期
[9]急冷水酸碱度的控制改进朱向东;中国石油抚顺石化分公司;辽宁抚顺;中外能源, China Foreign Energy, 2006年06期
[10]梁博,吴卓新,于喜安,白铁生.《乙烯装置急冷水pH值自动化控制应用》[J]辽宁化工, Liaoning Chemical Industry, 2008年07期
[11]李海周,姜涛.《浅析乙烯装置急冷水和稀释蒸汽发生系统的pH控制》[J].石油化工安全技术, Petrochemical Safety Technology, 2000年06期
[12].杨春生.《乙烯装置节能减排的重点是改造急冷油系统》[J].中外能源, 2009, (05) :101-106
[13]张春利,邹余敏,李强.《稀释蒸汽系统在线切出处理》[J].乙烯工业, Ethylene Industry, 1999年03期
[14]刘玉东,张殿波,安吉洪,魏哲如,严登超.《乙烯装置工艺水水质优化》[J].石化技术与应用, Petrochemical Technology & Application, 2008年03期
[15]孙殿博.《乙烯装置中稀释蒸汽发生器内漏原因及其防护的探讨》[J].乙烯工业, Ethylene Industry, 1994年01期
[16]鲁卫国,李强,章颖颀,王炯.《茂名乙烯装置长周期运转技术探索》[J].乙烯工业, Ethylene Industry, 2005年04期
[17]张延斌.《乙烯装置“节能节水减排”经验介绍》[J].内蒙古石油化工, Inner Mongolia Petrochemical Industry, 2008年09期
[18]张新伟.《加强水质控制减轻设备腐蚀》[J].乙烯工业, Ethylene Industry, 2001年04期
[19]郭英爽,胡海东,孙新民.《大庆乙烯装置稀释蒸汽发生系统存在的问题及处理措施》[J].乙烯工业, Ethylene Industry, 2008年04期
[20] CS1000/CS3000参考功能块编IM33S01B30-01 9版
[21] CS1000/CS300 Engineering Tutorial IM33S04H10-01E 15th Edition
[22] hxchenpengfei .《集散控制系统DCS简介》.海川在线
[23] CS300 FOUNDATION FIELDBUS REGERENCE IM33Y05P10-01E 11TH Edition
[24] CS1000/CS300 CENTUM DATA ACCESS LIBRARY IM33S02T10-01E 6th Edition
[25]张晓军,刘刚.《无模型自适应技术在pH值过程控制中的应用》.中国工控网
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