卧轮式FCC催化剂分级机的分级性能研究
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摘要
针对流化催化裂化(FCC)催化剂生产中的细粉分级问题,设计了一种卧轮式气流分级机,系统研究了主、二次风量和分级轮转速等操作参数对其分级性能的影响,并依据流体力学理论计算了各实验条件下的分级粒径。结果表明:该卧轮式分级机能够获得较好的FCC催化剂分级效果,其牛顿分级效率可达到82.4%,分级精度指数可达1.54;理论计算的切割粒径与实验测量值吻合较好,最大相对误差不超过4%。研究结果可为该卧轮式分级机的设计与应用提供基础数据支持。
A horizontal turbo air classifier was designed for classifying the FCC particles.Effects of the operational parameters(including the primary,secondary air volume flowrate and the rotor cage rotation speed)on particle classification were investigated.Then the powder particle cut size was calculated according to the fluid hydrodynamic theory under different experimental conditions.The above results suggest that the horizontal turbo air classifier can obtain good classification performance with Newton classifying efficiency of 82.4% and classifying accuracy index of 1.54.The maximum relative error for the cut size between the theory calculation and experimental results is less than 4%,which indicates that the theoretical predicted cut size agrees well with the experimental data.Our research results can provide the fundamental support for the design and application of the horizontal turbo air classifier.
A horizontal turbo air classifier was designed for classifying the FCC particles.Effects of the operational parameters(including the primary,secondary air volume flowrate and the rotor cage rotation speed)on particle classification were investigated.Then the powder particle cut size was calculated according to the fluid hydrodynamic theory under different experimental conditions.The above results suggest that the horizontal turbo air classifier can obtain good classification performance with Newton classifying efficiency of 82.4% and classifying accuracy index of 1.54.The maximum relative error for the cut size between the theory calculation and experimental results is less than 4%,which indicates that the theoretical predicted cut size agrees well with the experimental data.Our research results can provide the fundamental support for the design and application of the horizontal turbo air classifier.
引文
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[9]周岩,孙国刚,蒋绍洋,等.分级装置:CN,201621164424.2[P].2017-06-13
[10]SHARAPOV R R,PROKOPENKO V S,SHARAPOVR R.Modeling of the separation process in dynamic separators[J].World Applied Sciences Journal,2013,25(3):536-542.
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[14]童希林.旋风式分级机的实验研究[D].北京:中国石油大学,2013.
[15]姜培正.叶轮机械[M].西安:西安交通大学出版社,1991.
[2]田志鸿,周岩,杨凌,等.催化裂化催化剂焙烧回收粉分级技术研究[J].石油炼制与化工,2013,44(12):6-10.(TIAN Zhihong,ZHOU Yan,YANG Ling,et al.Study on classification of FCC catalyst fine powder gathered from calciner exit gas[J].Petroleum Processing and Petrochemicals,2013,44(12):6-10.)
[3]田志鸿,宋炳阳,孙国刚,等.旋下催化剂分级实验与工业应用[J].化工装备技术,2000,21(2):8-11.(TIAN Zhihong,SONG Bingyang,SUN Guogang,et al.Classification experiments and industrial application of FCC catalyst fine powder from cyclones[J].Chemical Equipment Technology,2000,21(2):8-11.)
[4]周健,田志鸿,吕庐峰,等.裂化催化剂分级实验研究[J].现代化工,2002,22(S1):162-164,167.(ZHOUJian,TIAN Zhihong,LLufeng,et al.Experimental study on classifying FCC catalyst[J].Modern Chemical Industry,2002,22(S1):162-164,167.)
[5]邹德红,孙国刚,吴绍金.催化剂细粉分级系统的设计与工业应用[J].齐鲁石油化工,2006,34(3):264-266,239.(ZOU Dehong,SUN Guogang,WU Shaojin.Design and commercial application of fine catalyst powder classification system[J].Qilu Petrochemical Technology,2006,34(3):264-266,239.)
[6]金光辉,乔新,陈猛,等.O-sepa选粉机密封环磨损处理[J].水泥技术,2013,(6):106,110.(JINGuanghui,QIAO Xin,CHEN Meng,et al.Wear processing of O-sepa separator sealing[J].Cement Technology,2013,(6):106,110.)
[7]宁翠霞,乔新,边培育,等.组合式选粉机转子密封改进[J].中国水泥,2012,(4):83-84.(NING Cuixia,QIAO Xin,BIAN Peiyu,et al.Sealing improvement of the combined turbo air classifier rotor cage[J].China Cement,2012,(4):83-84.)
[8]郭红军.离心式选粉机转子以静代动平衡法[J].中国建材装备,1996,(4):10-11,23.(GUO Hongjun.The centrifugal rotor classifier with static generation of dynamic balance method[J].China Building Material Equipment,1996,(4):10-11,23.)
[9]周岩,孙国刚,蒋绍洋,等.分级装置:CN,201621164424.2[P].2017-06-13
[10]SHARAPOV R R,PROKOPENKO V S,SHARAPOVR R.Modeling of the separation process in dynamic separators[J].World Applied Sciences Journal,2013,25(3):536-542.
[11]WORTHEN R A.Centrifugal air classification of fine particles using rotating disks[D].Gainesville:University of Florida,2001.
[12]WANG Q,MELAAEN M C,DE SILVA S R.Investigation and simulation of a cross-flow air classifier[J].Powder Technology,2001,120(3):273-280.
[13]曾川,刘传慧,陈海焱,等.二次风量对LNJ-36A型气流分级机分级性能的影响[J].化工进展,2015,34(11):3859-3863.(ZENG Chuan,LIU Chuanhui,CHEN Haiyan,et al.Effects of secondary air on the classification performance of LNJ-36Aair classifier[J].Chemical Industry and Engineering Progress,2015,34(11):3859-3863.)
[14]童希林.旋风式分级机的实验研究[D].北京:中国石油大学,2013.
[15]姜培正.叶轮机械[M].西安:西安交通大学出版社,1991.