新型MTO反应器环隙下料管内的压力特性
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摘要
在高约12.7m的新型MTO耦合反应器冷态实验装置上,在不同操作气速下,研究了上部环隙下料管4个截面位置及出料口下1个截面位置上的压力特性和平均固含率。通过对上述5个截面上压力脉动曲线及其标准偏差分析,发现截面1处压力脉动在低气速条件下较平稳,在高气速条件下较强烈,截面2和截面3处压力脉动最平稳,而截面4和截面5处压力脉动最剧烈;当下部环流反应器环隙区操作气速(Uga)一定时,随着导流筒区操作气速(Ugd)的增大,各截面平均压力值均不断增加,由截面3至截面1,颗粒呈现顺重力场负压差流动;当环隙区操作气速Uga=0.3m/s时,随着导流筒区操作气速(Ugd)的增大,各截面平均固含率均不断增大,在相同操作条件下,各截面上平均固含率差别较小,颗粒流动较平稳。
In a MTO cold model experimental apparatus with 12.7 m in height,the pressure characteristics and average solid holdups on five cross-sections were studied under different operating conditions.Four measuring cross-sections located in the downward pipe of the ring space and the other one is below the pipe.Results show that the pressure fluctuations on cross-section 1 are stable under low gas velocities,while a little violent under high gas velocities.The pressure fluctuations on section 2 and section 3 are the most stable,while those are the most violent on section 4 and section 5.Under the same gas velocity of annulus region Uga,the average pressure on each section increases with increasing the gas velocity of draft tube region.From section 3 to section1,particles flow in the gravitational field with a negative pressure difference.When the gas velocity of annulus region Ugais 0.3 m/s,the average solid holdup also increases with increasing the gas velocity of draft tube region.Under the same operating conditions,there is little difference of solid holdups among all the cross-sections,and the particle flow stably in this region.
In a MTO cold model experimental apparatus with 12.7 m in height,the pressure characteristics and average solid holdups on five cross-sections were studied under different operating conditions.Four measuring cross-sections located in the downward pipe of the ring space and the other one is below the pipe.Results show that the pressure fluctuations on cross-section 1 are stable under low gas velocities,while a little violent under high gas velocities.The pressure fluctuations on section 2 and section 3 are the most stable,while those are the most violent on section 4 and section 5.Under the same gas velocity of annulus region Uga,the average pressure on each section increases with increasing the gas velocity of draft tube region.From section 3 to section1,particles flow in the gravitational field with a negative pressure difference.When the gas velocity of annulus region Ugais 0.3 m/s,the average solid holdup also increases with increasing the gas velocity of draft tube region.Under the same operating conditions,there is little difference of solid holdups among all the cross-sections,and the particle flow stably in this region.
引文
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[2]汪明利,李奕辰,腾晓旭,等.甲醇制低碳烯烃的工业技术进展概述[J].广州化工,2016,44(19):11-13.(WANG Mingli,LI Yichen,TENG Xiaoxu,et al.Recent researches on industrial technologies from methanol to olefins[J].Guangzhou Chemical Industry,2016,44(19):11-13.)
[3]石胜启,吴凤明.甲醇制烯烃技术工业化进展[J].现代化工,2016,36(4):38-41.(SHI Shengqi,WU Fengming.Progress of industrialization of MTO/MTP technologies[J].Modern Chemical Industry,2016,36(4):38-41.)
[4]陈香生,刘昱,陈俊武.煤基甲醇制烯烃(MTO)工艺生产低碳烯烃的工程技术及投资分析[J].煤化工,2005,(5):10-15.(CHEN Xiangsheng,LIU Yu,CHEN Junwu.Technology and investment analysis on low carbon olefin based on MTO process from coal-to methanol[J].Coal Chemical Industry,2005,(5):10-15.)
[5]齐国祯,谢在库,钟思青,等.甲醇制低碳烯烃(MTO)反应热力学研究[J].石油与天然气化工,2005,34(5):349-353.(QI Guozhen,XIE Zaiku,ZHONG Siqing,et al.Thermodynamics research of methanol to olefins(MTO)[J].Chemical Engineering of Oil&Gas,2005,34(5):349-353.)
[6]邢爱华,岳国,朱伟平,等.甲醇制烯烃典型技术最新研究进展(Ⅱ)—工艺开发进展[J].现代化工,2010,30(10):18-25.(XING Ai’hua,YUE Guo,ZHU Weiping,et al.Recent advances in typical technology for methanol conversion to olefinsⅡDevelopment of Chemical Process[J].Modern Chemical Industry,2010,30(10):18-25.)
[7]南海明,文尧顺,吴秀章,等.甲醇制烯烃技术最新进展[J].现代化工,2014,34(7):41-46.(NAN Haiming,WEN Yaoshun,WU Xiuzhang,et al.Recent development of methanol to olefins technology[J].Modern Chemical Industry,2014,34(7):41-46.)
[8]CHEN D,GRNVOLD A,MOLJORDK,et al.Methanol conversion to light olefins over SAPO-34:Reaction network and deactivation kinetics[J].Ind Eng Chem Res,2007,46(12):4116-4123.
[9]吴秀章.流态化技术在甲醇制低碳烯烃装置中的应用[J].化学反应工程与工艺,2016,32(1):89-96.(WU Xiuzhang.The application of fluidization in commercial methanol-to-olefin unit[J].Chemical Reaction Engineering and Technology,2016,32(1):89-96.)
[10]王垚,狄佐星,李玉新,等.用于甲醇制烯烃的非均相催化反应器评述[J].化工学报,2014,65(7):2474-2484.(WANG Yao,DI Zuoxing,LI Yuxin,et al.Multiphase catalytic reactors for methanol-to-olefins[J].Journal of Chemical Industry and Engineering(China),2014,65(7):2474-2484.)
[11]文尧顺,南海明,吴秀章,等.甲醇制烯烃反应动力学及反应器模型研究进展[J].化工进展,2014,33(10):2521-2527.(WEN Yaoshun,NAN Minghai,WU Xiuzhang,et al.Advances in reaction kinetics and reactor models for methanol to olefins reaction[J].Chemical Industry and Engineering Process,2014,33(10):2521-2527.)
[12]尹静.新一代甲醇制烯烃DMTO-Ⅱ技术通过鉴定[J].炼油技术与工程,2010,(9):53.(YI Jing.A new generation technology of methanol to olefins DMTO-Ⅱpassed identification[J].Petroleum Refinery Engineering,2010,(9):53.)
[13]中国科学院大连化学物理研究所.由甲醇或/和二甲醚生产低碳烯烃的方法:中国,101157593B[P].2010-09-22.
[14]MILLER L W.Fast-fluidized bed reactor for MTO process:US,6166282[P].2000-12-26.
[15]严枭.环隙下料式组合流化床反应器的优化研究[D].北京:中国石油大学,2017.
[16]王子健.新型MTO反应器流动特性研究[D].北京:中国石油大学,2016.
[17]王芬芬,鄂承林,赵爱红,等.提升管中颗粒局部流率和速度的改进的光纤测量方法[J].化工学报,2016,67(8):3209-3223.(WANG Fenfen,E Chenglin,ZHAO Ai’hong,et al.Method of optical fiber measurement for local particle flux and velocity in riser[J].Journal of Chemical Industry and Engineering(China),2016,67(8):3209-3223.)