GAS-LIQUID DISPERSION PERFORMANCE IN AN UP-FLOW REACTOR

Abstract

Abstract: The effect of apparent gas velocity, axial height, diameter of riser and shape of solid particles on gas holdup distribution was investigated in cold mold test equipment with perforated plate gas - liquid distributor with cylindrical riser. The results showed that the initial bubble size generated by the gas-liquid distributor was large, mostly millimeter-scale bubbles. The uniformity of the gas holdup distribution became worse with the increase of gas velocity and the axial height. The gas dispersion performance of the gas-liquid distributor with a 26 mm riser is better than the gas-liquid distributor with a riser diameter of 48 mm. The ceramic ball, tooth spherical and clover-shaped particle all had a breakup effect on the bubble, and the breakup effect of the clover-shaped particle is better than ceramic ball and tooth spherical particle. The unevenness distribution of gas hold above the filler layer using clover-shaped solid particles is the smallest.

Key words: up-flow reactor, cold mold, gas-liquid distributor, solid particle, gas holdup distribution, riser

CLC Number:

References

[1] 李大东.加氢处理工艺与工程[M].北京：中国石化出版社，2004:6-25. [2] 方向晨.加氢裂化[M].北京：中国石化出版社，2008：171-175. [3] 韩崇仁.加氢裂化工艺与工程[M].北京：中国石化出版社，2001：391-434. [4] 刘凯祥,李浩,孙丽丽,等. 上流式加氢反应器内连续液相的控制方法[J]. 石油炼制与化工, 2012, 43(8):7-12. [5] 侯旭. 微膨胀床反应器气液分布器性能冷模实验和模拟研究[D].北京化工大学,2014. [6] 侯旭,李争,刘辉.微膨胀床反应器内气液分布设备性能数值模拟[J].北京化工大学学报(自然科学版),2014,41(06):29-34. [7] 王威杰. 上流式反应器内构件设计及流动和返混特性[D]. 中国科学院大学, 2018. [8] 颜攀,黄正梁,王靖岱,等.文丘里气泡发生器的气泡尺寸及分布[J].浙江大学学报(工学版),2017,51(10):2070-2076. [9] 吴美玲,帅云,黄正梁,等.固定床鼓泡反应器的混合特性[J].浙江大学学报(工学版),2018,52(04):754-760. [10] Reynolds Bruce E, Stangeland Bruce E, Parimi Krishniah, et al. Gas pocket distributor for hydroprocessing a hydrocarbon feed stream [P]. US 5885534, 1999-3-23. [11] Reynolds Bruce E, Lam Fred W, Chabot Julie, et al. Upflow reactor system with layered catalyst bed for hydrotreating heavy feedstocks [P]. US 6554994, 1999-4-13. [12] 唐晓津, 王少兵, 张占柱. 一种上流式反应器及其应用[P]. 中国：CN101632911, 2010-01-27. [13] 王喜彬, 贾丽. 一种上流式反应器气液分布器及应用[P]. 中国：CN103100352, 2013-05-15. [14] 程振民, 杨雨清, 吴思操, 等. 一种上流式反应器气液分配盘及其段间补氢装置[P]. 中国：CN104056579A, 2014-09-24. [15] 吉敏,杨钊,娄晓军,等.上流式反应器中流体流动及返混特性研究[J].化学工程,2015,43(11):41-46. [16] 郭天琪. 射流鼓泡反应器的流动行为与传质特性研究[D].浙江大学,2016.