乙炔加氢反应器全周期操作优化

doi:10.11949/j.issn.0438-1157.20170844

摘要/Abstract

摘要：

乙炔加氢反应器作为乙烯工业流程的重要环节，其运行会很大程度上影响到乙烯产品的产量和纯度。在一个运行周期内，乙炔加氢反应器内催化剂活性会随时间推移而缓慢降低，使操作点偏移，乙烯产量会随之降低。为了实现全周期操作优化，通过研究催化剂的失活机理，提出了考虑绿油累积效果的催化剂失活动力学模型，进而改进了乙炔加氢反应器二维非均相模型。通过在gPROMS平台模拟反应器全周期运行验证了改进模型的正确性，在上层运用Matlab优化器与gPROMS平台交互求解一个运行周期的操作优化问题。优化结果表明，与定值温度补偿方案相比，全周期操作优化在经济效益和反应器再生周期两方面都要优于定值温度补偿方案，且同时优化入口温度与入口加氢量的全周期操作优化方案具有更大的优势。

关键词: 过程系统, 操作优化, 过程控制, 乙炔加氢, 催化剂失活模型

Abstract:

Acetylene hydrogenation reactor is an important unit operation in ethylene process, whose operation deeply influences yield and purity of ethylene product. Within an operating cycle, the catalyst activity in reactor gradually declines with time, the operating point will slowly deviates from the initial steady-state design point such that the ethylene yield will drop. To implement the full-cycle operation optimization, the kinetics model of catalyst deactivation considering green oil accumulation is presented through deactivation mechanism research, then a two-dimensional heterogeneous dynamic model of acetylene hydrogenation reactor with modified catalyst deactivation equation is proposed. The full-cycle simulation on gPROMS software verifies the correctness of modified model, and the full-cycle operation optimization is solved by Matlab optimizer on upper layer interacting with gPROMS simulation. The optimization results show that, the full-cycle operation optimization is superior to the fixed value temperature compensation in regard to both the economic benefit and the regeneration cycle of reactor, and the full-cycle operation optimization simultaneously optimizing inlet temperature and hydrogen input is of greater advantage.

Key words: process systems, operation optimization, process control, acetylene hydrogenation, catalyst deactivation model

中图分类号:

TQ021.8

谢府命, 许锋, 梁志珊, 罗雄麟, 石凤勇. 乙炔加氢反应器全周期操作优化[J]. 化工学报, 2018, 69(3): 1081-1091.

XIE Fuming, XU Feng, LIANG Zhishan, LUO Xionglin, SHI Fengyong. Full-cycle operation optimization of acetylene hydrogenation reactor[J]. CIESC Journal, 2018, 69(3): 1081-1091.

参考文献 30

[1]	涂飞, 青红英, 罗雄麟, 等. 乙炔加氢反应器的先进控制(Ⅰ):动态机理模型的建立[J]. 化工自动化及仪表, 2003, 30(1):20-24. TU F, QING H Y, LUO X L, et al. Advanced process control of acetylene hydrogenation reactor (Ⅰ):Construct dynamic model[J]. Control and Instruments in Chemical Industry, 2003, 30(1):20-24.
[2]	WEISS G. Modeling and control of the acetylene converter[J]. Journal of Process Control, 1996, 6(1):7-15.
[3]	GOBBO R. SOARES R P, LANSARIN M A, et al. Modeling, simulation, and optimization of a front-end system for acetylene hydrogenation reactors[J]. Brazilian Journal of Chemical Engineering, 2004, 21(4):545-556.
[4]	HUANG W, MCCORMICK J R, LOBO R F, et al. Selective hydrogenation of acetylene in the presence of ethylene on zeolite-supported bimetallic catalysts[J]. Journal of Catalysis, 2007, 246(1):40-51.
[5]	PACHULSKI A, SCHODEL R, CLAUS P. Kinetics and reactor modeling of a Pd-Ag/Al2O3 catalyst during selective hydrogenation of ethyne[J]. Applied Catalysis A:General, 2012, 445/446(6):107-120.
[6]	SZUKIEWICZ M, KACZMARSKI K, PETRUS R. Modeling of fixed-bed reactor:two models of industrial reactor for selective hydrogenation of acetylene[J]. Chemical Engineering Science, 1998, 53(1):149-155.
[7]	罗雄麟, 刘建新, 许锋, 等. 乙炔加氢反应器二维非均相机理动态建模及分析[J]. 化工学报, 2008, 59(6):1454-1461. LUO X L, LIU J X, XU F, et al. Hydrogenation, two-dimensional dynamic modeling and analysis of acetylene hydrogenation reactor[J]. Journal of Chemical Industry and Engineering(China), 2008, 59(6):1454-1461.
[8]	BORODZINSKI A, CYBULSKI A. The kinetic model of hydrogenation of acetylene-ethylene mixtures over palladium surface covered by carbonaceous deposits[J]. Applied Catalysis A:General, 2000, 198(1):51-66.
[9]	BROWN M W, PENLIDIS A, SULLIVAN G R. Control policies for an industrial acetylene hydrogenation reactor[J]. Canadian Journal of Chemical Engineering, 2010, 69(1):56-59.
[10]	LESIEUR M, SHARMA S, NATH R. Advanced process control and optimization of acetylene hydrogenation reactors[C]//2003 AIChE Spring National Meeting 15th Annual Ethylene Producers' Conference Session T9a05-Ethylene Plant Process Control. 2003:T9a05-F.
[11]	田亮, 蒋达, 钱锋. 乙炔加氢反应系统操作优化策略[J]. 化工学报, 2015, 66(1):373-377. TIAN L, JIANG D, QIAN F. Reactor system switch strategy for acetylene hydrogenation process[J]. CIESC Journal, 2015, 66(1):373-377.
[12]	田亮, 蒋达, 钱锋. 催化剂失活条件下的碳二加氢反应器模拟与优化[J]. 化工学报, 2012, 63(1):185-192. TIAN L, JIANG D, QIAN F. Simulation and optimization of acetylene converter with decreasing catalyst activity[J]. CIESC Journal, 2012, 63(1):185-192.
[13]	张志良. 反应深度分析与控制[D]. 北京:中国石油大学, 2006. ZHANG Z L. Analysis and control of the reaction depth[D]. Beijing:China University of Petroleum, 2006.
[14]	戴伟, 朱警, 万文举. C2馏分选择加氢工艺和催化剂研究进展[J]. 石油化工, 2000, 29(7):535-540. DAI W, ZHU J, WAN W J. Research development of C2 selective hydrogenation technology and catalysis[J]. Petrochemical Technology, 2000, 29(7):535-540.
[15]	朱炳辰. 化学反应工程[M]. 北京:化学工业出版社, 2001:41-42. ZHU B C. Chemical Reaction Engineering[M]. Beijing:Chemical Industry Press, 2001:41-42.
[16]	涂飞. 乙炔加氢反应器先进控制及工程应用[D]. 北京:中国石油大学, 2002. TU F. Advanced process control and engineering application of acetylene hydrogenation reactor[D]. Beijing:China University of Petroleum, 2002.
[17]	罗雄麟, 涂飞, 杜殿林, 等. 乙炔加氢反应器的先进控制(Ⅲ):控制策略及工程应用[J]. 化工自动化及仪表, 2003, 30(3):10-15. LUO X L, TU F, DU D L, et al. Advanced process control of acetylene hydrogenation reactor (Ⅲ):Control strategy and engineering application[J]. Control and Instruments in Chemical Industry, 2003, 30(3):10-15.
[18]	刘建新. 乙炔加氢反应器动态模拟与操作优化[D]. 北京:中国石油大学, 2008. LIU J X. Dynamic modeling and operation optimization of acetylene hydrogenation reactor[D]. Beijing:China University of Petroleum, 2008.
[19]	XU F, LUO X L, WANG R. Design margin and control performance analysis of a fluid catalytic cracking unit regenerator under model predictive control[J]. Industrial & Engineering Chemistry Research, 2014, 53(37):14339-14350.
[20]	XU F, JIANG H R, WANG R, et al. Influence of design margin on operation optimization and control performance of chemical processes[J]. Chinese Journal of Chemical Engineering, 2014, 22(1):51-58.
[21]	许锋, 罗雄麟. 基于动态优化的催化裂化装置再生器裕量分析与控制设计(Ⅰ):动态优化的数学描述[J]. 化工学报, 2009, 60(3):675-682. XU F, LUO X L. Margin analysis and control design of FCCU regenerator based on dynamic optimization (Ⅰ):Mathematical description of dynamic optimization[J]. CIESC Journal, 2009, 60(3):675-682.
[22]	许锋, 罗雄麟. 基于动态优化的催化裂化装置再生器裕量分析与控制设计(Ⅱ):求解方法与结果分析[J]. 化工学报, 2009, 60(3):683-690. XU F, LUO X L. Margin analysis and control design of FCCU regenerator based on dynamic optimization (Ⅱ):Solution and result analysis[J]. CIESC Journal, 2009, 60(3):683-690.
[23]	许锋, 罗雄麟. 先进控制条件下化工过程操作裕量与控制性能分析[J]. 化工学报, 2012, 63(3):881-886. XU F, LUO X L. Manipulation margin and control performance analysis of chemical process under advanced process control[J]. CIESC Journal, 2012, 63(3):881-886.
[24]	许锋, 蒋慧蓉, 王锐, 等. 催化裂化装置裕量评价与瓶颈分析[J]. 化工学报, 2013, 64(6):2131-2144. XU F, JIANG H R, WANG R, et al. Margin evaluation and bottleneck analysis for FCCU[J]. CIESC Journal, 2013, 64(6):2131-2144.
[25]	蒋慧蓉. 化工过程裕量分析与控制设计及其在催化裂化装置的应用[D]. 北京:中国石油大学(北京), 2013. JIANG H R. Margin analysis and control design of chemical process in fluidized catalytic cracking unit[D]. Beijing:China University of Petroleum, 2013.
[26]	RAVANCHI M T, SAHEBDELFAR S. Pd-Ag/Al2O3 catalyst:stages of deactivation in tail-end acetylene selective hydrogenation[J]. Applied Catalysis A:General, 2016, 525:197-203.
[27]	KUHN M, LUCAS M, CLAUS P. Precise recognition of catalyst deactivation during acetylene hydrogenation studied with the advanced TEMKIN reactor catalysis[J]. Communications, 2015, 72(2):170-173.
[28]	MCCUE A J, MCRITCHIE C J, SHEPHERD A M, et al. Cu/Al2O3 catalysts modified with Pd for selective acetylene hydrogenation[J]. Journal of Catalysis, 2014, 319:127-135.
[29]	ALBERS P, PIETSCH J, PARKER S F. Poisoning and deactivation of palladium catalysts[J]. Journal of Molecular Catalysis A:Chemical, 2001, 173(1):275-286.
[30]	RAHIMPOUR M R, DEHGHANI O, GHOLIPOUR M R, et al. A novel configuration for Pd/Ag/a-Al2O3 catalyst regeneration in the acetylene hydrogenation reactor of a multi feed cracker[J]. Chemical Engineering Journal, 2012, 198/199:491-502.