Numerical simulation of vortex-eliminating plates in super vortex quick separation system at end of catalytic cracking riser

doi:10.11949/j.issn.0438-1157.20180030

Abstract

Abstract:

Gas phase flow fields in the exit space at upper section of a f572 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.

Key words: riser, separation, numerical simulation

摘要：

在大型冷模实验基础上，采用RNG k-ε湍流模型对一套φ572 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。

关键词: 提升管, 分离, 数值模拟

CLC Number:

WANG Yingqi, LU Chunxi, E Chenglin. Numerical simulation of vortex-eliminating plates in super vortex quick separation system at end of catalytic cracking riser[J]. CIESC Journal, 2018, 69(5): 1854-1866.

王瑛琦, 卢春喜, 鄂承林. 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[J]. 化工学报, 2018, 69(5): 1854-1866.

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