Numerical simulation of water-slag elbow erosion-inhibiting by regulating the slag injection position with a novel preceding rotating sheet structure

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外文摘要：The elbow erosion seriously jeopardizes the safe and stable operation of water-slag discharge pipeline of the coal gasification system.This work simulated water-slag elbow characteristics with various slag injection positions by simulating five simplified and representative erosion categories,including A-type horizontal-vertical elbow with an upstream flow,B-type horizontal-vertical elbow with a downstream flow,C-type vertical-horizontal elbow with an upstream flow,D-type vertical-horizontal elbow with a downstream flow and E-type horizontal-horizontal elbow.Compared with the C/D-type elbow,where particles were injected uniformly,the A-type elbow and E-type elbow were found to increase erosion rate,while the B-type elbow decreases erosion rate.An interesting discovery is that the elbow erosion rate is relatively low for small particles when particles are injected from the middle and bottom positions of the inlet section of the elbow.Based on the observation,a novel preceding rotating sheet structure was developed to regulate the particle injection position.It shows an excellent anti-erosion performance by reducing the maximum erosion rate of particles with diameters of 50,100,and 200 μm by 23％,35％,and 43％,respectively.

外文关键词：

ErosionSlag-waterUneven particlesElbow pipeErosion inhibitionPreceding rotating sheet structure

作者：

Fopeng Wen、Liuyun Xu、Yixiang Chen、Zhaofu Deng、Shen Zhang、Wenming Song、Yuge Li、Liping Wei

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作者单位：

School of Chemical Engineering,Northwest University,Xi'an,710069,China

School of Chemistry and Chemical Engineering,Yan'an University,Yan'an,716000,China

Machinery Industry Shanghai Lanya Petrochemical Equipment Inspection Institute Co.,Ltd.,Shanghai,201518,China

The Research Center of Chemical Engineering Applying Technology for Resource of Shaanxi,Xi'an,710069,China

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基金：

National Natural Science Foundation of ChinaShaanxi Province's Key Research and Development PlanShaanxi Province's Key Research and Development PlanNatural Science Basic Research Program of ShaanxiNatural Science Foundation of Shaanxi Provincial Department of Education

项目编号：

222783322023-YBGY-3172023-YBGY-1752020JQ-59723JK0723

出版年：

2024

DOI：

10.1016/j.partic.2024.01.001

颗粒学报(英文版)

中国颗粒学会　中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCD

影响因子：0.632

ISSN：1674-2001

年,卷(期)：2024.90(7)