催化裂化提升管末端旋流快分系统消涡板结构的数值模拟
|
摘要
在大型冷模实验基础上,采用RNG k-ε湍流模型对一套?572 mm×3000 mm的旋流快分系统(SVQS)装置上部气体引出空间加设消涡板前后的气相流场进行了模拟研究。结果表明:在旋流快分上部空间加设两种不同结构消涡板都可以有效缓解边壁处的高速旋涡区。通过对比发现:在沉降器内壁面加装消涡板可以有效降低压降,降低消涡板上方气流即螺旋程度。直型消涡板压降较小,优于加装弯型消涡板。
Gas phase flow fields in the exit space at upper section of a ?572 mm × 3000 mm super vortex quick separation system(SVQS) were simulated with and without vortex-eliminating plates by using RNG k-ε turbulent model on the basis of experimental data on large scale cold equipment. The simulation results show that plates of two different structures can efficiently alleviate high speed vortexes near the wall. By comparison, it was found that wall-mounted vortex-eliminating plate could effectively reduce pressure drop and spiral degree of airflow above the plate. Straight vortex-eliminating plate had smaller pressure drop and better outcomes than bent counterpart.
Gas phase flow fields in the exit space at upper section of a ?572 mm × 3000 mm super vortex quick separation system(SVQS) were simulated with and without vortex-eliminating plates by using RNG k-ε turbulent model on the basis of experimental data on large scale cold equipment. The simulation results show that plates of two different structures can efficiently alleviate high speed vortexes near the wall. By comparison, it was found that wall-mounted vortex-eliminating plate could effectively reduce pressure drop and spiral degree of airflow above the plate. Straight vortex-eliminating plate had smaller pressure drop and better outcomes than bent counterpart.
引文
[1]AMOS S,AVIDANT A.FCC close-cyclone system eliminates postriser cracking[J].Oil&Gas Journal,1990,67(3):57-58.
[2]GILBERT A T.Customized FCC Revamps[C]//UOP Refining Technology Conference.1995:28.
[3]GAUTHIER T,BAYLE J,LEROY P.FCC:fluidization phenomena and technologies.Oil&Gas Science and Technology[C]//Customized FCC Revamps.UOP Refining Technology Conference.2000:55.
[4]CHEN Y,BROSTEM D J.Standpipe inlet enhancing particulate solids circulation for petrochemical and other processes:US6228328[P].2001.
[5]卢春喜,徐文清,魏耀东,等.新型紧凑式催化裂化沉降系统的实验研究[J].石油学报(石油加工),2007,23(6):6-12.LU C X,XUN W Q,WEI Y D,et al.Experimental studies of a novel compact FCC disengage[J].Acta Petrolei Sinica(Petroleum Processing Section),2007,23(6):6-12.
[6]马艺.超短接触旋流反应器流动特征及反应行为研究[D].东营:中国石油大学(华东),2012.MA Y.Ultra short contact vortex flow reactor flow characteristic and reaction behavior research[D].Dongying:China University of Petroleum,2012.
[7]张永民,卢春喜,时铭显.催化裂化新型环流汽提器的大型冷模实验[J].高校化学工程学报,2004,18(3):377-380.ZHANG Y M,LU C X,SHI M X.Large-scale cold pilot experiment on a new annular catalyst stripper for FCC unit[J].Journal of Chemical Engineering of Chinese Universities,2004,18(3):377-380.
[8]刘显成,卢春喜,时铭显.两段气升式气固环流取热器导流筒壁与床层间的传热特性研究[J].过程工程学报,2004,4(z1):611-618.LIU X C,LU C X,SHI M X.Study on heat transfer between gas-solids suspension and the surfaces of two draft tubes in an airlift loop heat exchanger[J].Journal of Process Engineering,2004,4(z1):611-618.
[9]THIERRY G,REGIS A,JAN V,et al.Industrial development and operation of an efficient riser separation system for FCC units[J].International Journal of Chemical Reactor Engineering,2005,3(1):128-136.
[10]HADDAD J H,OWEN H,SCHATZ K W.Closed cyclone FCC catalyst separation method and apparatus:US4502947[P].1985.
[11]王婷,刘梦溪.不同出口结构卧式超短快分内部气相流场[J].化学反应工程与工艺,2016,32(4):297-306.WANG T,LIU M X.The flow field in horizontal short residence time separator with different outlet structures[J].Chemical Reaction Engineering and Technology,2016,32(24):297-306.
[12]孙凤侠,卢春喜,时铭显,等.催化裂化沉降器新型高效旋流快分器内气固两相流动[J].化工学报,2005,56(12):2280-2287.SUN F X,LU C X,SHI M X,et al.Numerical simulation of gas particles flow field in new vortex quick separation system for FCC disengager[J].Journal of Chemical Industry and Engineering(China),2005,56(12):2280-2287.
[13]李丽华.气升式环流反应器流体力学、混合、传质特性研究[D].大连:大连理工大学,2005.LI L H.Study on the hydrodynamic,mixing and mass transfer characteristics of airlift loop reactors[D].Dalian:Dalian University of Technology,2005.
[14]刘梦溪,谢建平,卢春喜,等.环隙气升式气固环流反应器内流体力学特性的理论分析[J].化工学报,2008,59(9):2198-2205.LIU M X,XIE J P,LU C X,et al.Theoretical analysis of hydrodynamics in novel gas-solids annulus-sparged airlift loop reactor[J].Journal of Chemical Industry and Engineering(China),2008,59(9):2198-2205.
[15]孙凤侠,卢春喜,时铭显.旋流快分器内气相流场的实验与数值模拟研究[J].石油大学学报(自然科学版),2005,29(3):106-111.SUN F X,LU C X,SHI M X.Experiment and numerical simulation of gas flow field in new vortex quick separation system[J].Journal of the University of Petroleum China,2005,29(3):106-111.
[16]孙凤侠,卢春喜,时铭显.催化裂化沉降器新型高效旋流快分器的结构优化与分析[J].中国石油大学学报(自然科学版),2007,31(5):109-113.SUN F X,LU C X,SHI M X.Configuration optimization and analysis of newly developed vortex quick separator for FCC disengage[J].Journal of China University of Petroleum,2007,31(5):109-113.
[17]胡艳华,王洋,卢春喜,等.催化裂化提升管出口旋流快分系统内隔流筒结构的优化改进[J].石油学报(石油加工),2008,24(2):177-183.HU Y H,WANG Y,LU C X,et al.Improvement of the isolate cylinder in vortex quick separation system at FCCU riser outlet[J].Acta Petrolei Sinica(Petroleum Processing Section),2008,24(2):177-183.
[18]程兆龙,鄂承林,卢春喜.提升管出口SVQS自然旋风长度的数值模拟[J].化工学报,2016,67(8):3347-3356.CHEN Z L,E C L,LU C X.Numerical simulation of natural vortex length in riser termination with SVQS system[J].CIESC Journal,2016,67(8):3347-3356.
[19]程兆龙,姚秀颖,鄂承林,等.带隔流筒旋流快分新型工业催化裂化沉降器内气相流场的数值模拟[J].过程工程学报,2016,16(1):86-95.CHEN Z L,YAO X Y,E C L,et al.Numerical simulation of gas phase flow field in a novel FCC disengager with flow partition cylinder quick separation system[J].The Chinese Journal of Process Engineering,2016,16(1):86-95.
[20]HOFFMANN A C,STEIN L E.Gas Cyclones and Swirl Tubes:Principles,Design and Operation[M].Berlin:Springer,2002.
[21]李智,李萌,张博峰,等.带有环流预汽提的旋流快分系统动态压力的小波分析[J].过程工程学报,2017,17(1):11-20.LI Z,LI M,ZHANG B F,et al.Wavelet analysis of dynamic pressure in vortex quick separation system with annular pre-stripper[J].The Chinese Journal of Process Engineering,2017,17(1):11-20.
[22]李建涛,李智,卢春喜.催化裂化密闭快分系统封闭罩内流场优化[J].中国粉体技术,2017,23(3):73-80.LI J T,LI Z,LU C X.Optimization of flow field in closing cylinder of circulation stripping vortex quick separator system[J].China Powder Science and Technology,2017,23(3):73-80.
[23]WEI Y D,SONG J F,SHI M X,et al.Numerical simulation of the asymmetry of gas-phase flow field in a volute cyclone separator[J].Progress in Natural Science,Special Issue,2005,15:99-105.
[24]BLEVINS R D.Applied Fluid Dynamics Handbook[M].New York:Van No strand Reinhold Company Inc.,1984:71-79.
[25]BI H T,GRACE J R,ZHU J X.Propagation of pressure waves and forced oscillation of fluidized beds and their effects on measurements of local hydrodynamics[J].Powder Technology,1995,82(3):239-253.
[26]SUN F X,LU C X,SHI M X.Experiment and numerical simulation of flow field in the multi-arm vortex quick separation system of FCC disengage[J].Advances in Multiphase Flows,2004:146-150.
[27]魏耀东,张静,宋健斐,等.旋风分离器自然旋风长的实验研究[J].热能动力工程,2010,25(2):206-210.WEI Y D,ZHANG J,SONG J F,et al.Experimental study of the natural cyclone length of a cyclone separator[J].Journal of Engineering for Thermal Energy and Power,2010,25(2):206-210.
[28]李智.带有环流预汽提的旋流快分系统动态压力特性研究[D].北京:中国石油大学(北京),2017.LI Z.Study of dynamic pressure in circulating stripping vortex quick separator[D].Beijing:China University of Petroleum,2017.
[29]王福军.计算流体动力学分析——CFD软件原理与应用[M].北京:清华大学出版社,2009:122-125.WANG F J.Computational Hydrodynamics Analysis—CFD Software Theory and Application[M].Beijing:Tsinghua University Press,2009:122-125.
[2]GILBERT A T.Customized FCC Revamps[C]//UOP Refining Technology Conference.1995:28.
[3]GAUTHIER T,BAYLE J,LEROY P.FCC:fluidization phenomena and technologies.Oil&Gas Science and Technology[C]//Customized FCC Revamps.UOP Refining Technology Conference.2000:55.
[4]CHEN Y,BROSTEM D J.Standpipe inlet enhancing particulate solids circulation for petrochemical and other processes:US6228328[P].2001.
[5]卢春喜,徐文清,魏耀东,等.新型紧凑式催化裂化沉降系统的实验研究[J].石油学报(石油加工),2007,23(6):6-12.LU C X,XUN W Q,WEI Y D,et al.Experimental studies of a novel compact FCC disengage[J].Acta Petrolei Sinica(Petroleum Processing Section),2007,23(6):6-12.
[6]马艺.超短接触旋流反应器流动特征及反应行为研究[D].东营:中国石油大学(华东),2012.MA Y.Ultra short contact vortex flow reactor flow characteristic and reaction behavior research[D].Dongying:China University of Petroleum,2012.
[7]张永民,卢春喜,时铭显.催化裂化新型环流汽提器的大型冷模实验[J].高校化学工程学报,2004,18(3):377-380.ZHANG Y M,LU C X,SHI M X.Large-scale cold pilot experiment on a new annular catalyst stripper for FCC unit[J].Journal of Chemical Engineering of Chinese Universities,2004,18(3):377-380.
[8]刘显成,卢春喜,时铭显.两段气升式气固环流取热器导流筒壁与床层间的传热特性研究[J].过程工程学报,2004,4(z1):611-618.LIU X C,LU C X,SHI M X.Study on heat transfer between gas-solids suspension and the surfaces of two draft tubes in an airlift loop heat exchanger[J].Journal of Process Engineering,2004,4(z1):611-618.
[9]THIERRY G,REGIS A,JAN V,et al.Industrial development and operation of an efficient riser separation system for FCC units[J].International Journal of Chemical Reactor Engineering,2005,3(1):128-136.
[10]HADDAD J H,OWEN H,SCHATZ K W.Closed cyclone FCC catalyst separation method and apparatus:US4502947[P].1985.
[11]王婷,刘梦溪.不同出口结构卧式超短快分内部气相流场[J].化学反应工程与工艺,2016,32(4):297-306.WANG T,LIU M X.The flow field in horizontal short residence time separator with different outlet structures[J].Chemical Reaction Engineering and Technology,2016,32(24):297-306.
[12]孙凤侠,卢春喜,时铭显,等.催化裂化沉降器新型高效旋流快分器内气固两相流动[J].化工学报,2005,56(12):2280-2287.SUN F X,LU C X,SHI M X,et al.Numerical simulation of gas particles flow field in new vortex quick separation system for FCC disengager[J].Journal of Chemical Industry and Engineering(China),2005,56(12):2280-2287.
[13]李丽华.气升式环流反应器流体力学、混合、传质特性研究[D].大连:大连理工大学,2005.LI L H.Study on the hydrodynamic,mixing and mass transfer characteristics of airlift loop reactors[D].Dalian:Dalian University of Technology,2005.
[14]刘梦溪,谢建平,卢春喜,等.环隙气升式气固环流反应器内流体力学特性的理论分析[J].化工学报,2008,59(9):2198-2205.LIU M X,XIE J P,LU C X,et al.Theoretical analysis of hydrodynamics in novel gas-solids annulus-sparged airlift loop reactor[J].Journal of Chemical Industry and Engineering(China),2008,59(9):2198-2205.
[15]孙凤侠,卢春喜,时铭显.旋流快分器内气相流场的实验与数值模拟研究[J].石油大学学报(自然科学版),2005,29(3):106-111.SUN F X,LU C X,SHI M X.Experiment and numerical simulation of gas flow field in new vortex quick separation system[J].Journal of the University of Petroleum China,2005,29(3):106-111.
[16]孙凤侠,卢春喜,时铭显.催化裂化沉降器新型高效旋流快分器的结构优化与分析[J].中国石油大学学报(自然科学版),2007,31(5):109-113.SUN F X,LU C X,SHI M X.Configuration optimization and analysis of newly developed vortex quick separator for FCC disengage[J].Journal of China University of Petroleum,2007,31(5):109-113.
[17]胡艳华,王洋,卢春喜,等.催化裂化提升管出口旋流快分系统内隔流筒结构的优化改进[J].石油学报(石油加工),2008,24(2):177-183.HU Y H,WANG Y,LU C X,et al.Improvement of the isolate cylinder in vortex quick separation system at FCCU riser outlet[J].Acta Petrolei Sinica(Petroleum Processing Section),2008,24(2):177-183.
[18]程兆龙,鄂承林,卢春喜.提升管出口SVQS自然旋风长度的数值模拟[J].化工学报,2016,67(8):3347-3356.CHEN Z L,E C L,LU C X.Numerical simulation of natural vortex length in riser termination with SVQS system[J].CIESC Journal,2016,67(8):3347-3356.
[19]程兆龙,姚秀颖,鄂承林,等.带隔流筒旋流快分新型工业催化裂化沉降器内气相流场的数值模拟[J].过程工程学报,2016,16(1):86-95.CHEN Z L,YAO X Y,E C L,et al.Numerical simulation of gas phase flow field in a novel FCC disengager with flow partition cylinder quick separation system[J].The Chinese Journal of Process Engineering,2016,16(1):86-95.
[20]HOFFMANN A C,STEIN L E.Gas Cyclones and Swirl Tubes:Principles,Design and Operation[M].Berlin:Springer,2002.
[21]李智,李萌,张博峰,等.带有环流预汽提的旋流快分系统动态压力的小波分析[J].过程工程学报,2017,17(1):11-20.LI Z,LI M,ZHANG B F,et al.Wavelet analysis of dynamic pressure in vortex quick separation system with annular pre-stripper[J].The Chinese Journal of Process Engineering,2017,17(1):11-20.
[22]李建涛,李智,卢春喜.催化裂化密闭快分系统封闭罩内流场优化[J].中国粉体技术,2017,23(3):73-80.LI J T,LI Z,LU C X.Optimization of flow field in closing cylinder of circulation stripping vortex quick separator system[J].China Powder Science and Technology,2017,23(3):73-80.
[23]WEI Y D,SONG J F,SHI M X,et al.Numerical simulation of the asymmetry of gas-phase flow field in a volute cyclone separator[J].Progress in Natural Science,Special Issue,2005,15:99-105.
[24]BLEVINS R D.Applied Fluid Dynamics Handbook[M].New York:Van No strand Reinhold Company Inc.,1984:71-79.
[25]BI H T,GRACE J R,ZHU J X.Propagation of pressure waves and forced oscillation of fluidized beds and their effects on measurements of local hydrodynamics[J].Powder Technology,1995,82(3):239-253.
[26]SUN F X,LU C X,SHI M X.Experiment and numerical simulation of flow field in the multi-arm vortex quick separation system of FCC disengage[J].Advances in Multiphase Flows,2004:146-150.
[27]魏耀东,张静,宋健斐,等.旋风分离器自然旋风长的实验研究[J].热能动力工程,2010,25(2):206-210.WEI Y D,ZHANG J,SONG J F,et al.Experimental study of the natural cyclone length of a cyclone separator[J].Journal of Engineering for Thermal Energy and Power,2010,25(2):206-210.
[28]李智.带有环流预汽提的旋流快分系统动态压力特性研究[D].北京:中国石油大学(北京),2017.LI Z.Study of dynamic pressure in circulating stripping vortex quick separator[D].Beijing:China University of Petroleum,2017.
[29]王福军.计算流体动力学分析——CFD软件原理与应用[M].北京:清华大学出版社,2009:122-125.WANG F J.Computational Hydrodynamics Analysis—CFD Software Theory and Application[M].Beijing:Tsinghua University Press,2009:122-125.