Study of EDC parameters for predicting entrained flow coal gasification

被引：0

作者：

Qiu P. ^{[1
]}

Han Y. ^{[1
]}

Xu J. ^{[1
]}

Wang F. ^{[1
]}

Dai Z. ^{[1
,2
]}

机构：

[1] Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai

[2] School of Chemical Engineering and Technology, Xinjiang University, Xinjiang, Urumqi

来源：

Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 01期

关键词：

entrained flow reactor; gasification; numerical simulation; opposed multi-burner; slurry;

D O I：

10.11949/0438-1157.20221131

中图分类号：

学科分类号：

摘要：

The entrained flow coal gasifier is a multi-phase turbulent reactor accompanied by homogeneous reaction processes such as combustion and transformation, which can be simulated by eddy dissipation concept (EDC) model for turbulence-chemical reaction interaction, but the model parameters need to be corrected. The effects of EDC model parameters on syngas temperature and composition were investigated by analyzing the parameter modification range of EDC model for gasifier under Realizable κ-ε condition with a 1500 t/d opposed multi-burner (OMB) coal-water slurry (CWS) gasifier. Four groups of EDC models with different parameters and (finite-rate/eddy-dissipation) ED model was numerically investigated and verified with the outlet industrial data. The results showed that when CD1=0.213,0.272≤CD2≤2.268. After modification of the model constants in this range, the relative errors of temperature, CO and H2 volume fraction at the outlet were lower than original value, and the minimum were -2.54%, -3.93%, and 0.74%, respectively, while those of the ED model were 7.95%, 5.52% and -2.74%, respectively. The temperature and composition results of the EDC simulation with default parameters are always within the range of the boundary parameter model, and the range becomes narrower closer to the gasifier outlet, and the simulation results of each model tend to be consistent. © 2023 Chemical Industry Press. All rights reserved.

引用

页码：428 / 437

页数：9

共 33 条

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