Modeling slag behavior in membrane wall gasifier

BI Dapeng; ZHAO Yong; GUAN Qingliang; XUAN Weiwei; ZHANG Jiansheng

doi:10.11949/j.issn.0438-1157.20141321

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Modeling slag behavior in membrane wall gasifier

更新时间：2025-12-10

- Modeling slag behavior in membrane wall gasifier
- CIESC Journal Issue 3, Pages: 888-895(2015)
- 作者机构：
  
  清华大学热能工程系, 热科学与动力工程教育部重点实验室,北京,100084
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141321
  CLC： Q54
- Online First：05 March 2015，
  
  Published：05 March 2015
- 稿件说明：
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BI Dapeng, ZHAO Yong, GUAN Qingliang, et al. Modeling slag behavior in membrane wall gasifier[J]. CIESC Journal, 2015, (3): 888-895.
DOI：

BI Dapeng, ZHAO Yong, GUAN Qingliang, et al. Modeling slag behavior in membrane wall gasifier[J]. CIESC Journal, 2015, (3): 888-895. DOI： 10.11949/j.issn.0438-1157.20141321.

摘要

通过将3D气化炉模型、熔渣一维流动传热模型和颗粒壁面捕捉模型耦合

对工业水煤浆水冷壁气化炉内的熔渣流动特性进行模型研究。重点分析了颗粒壁面行为对气化炉结渣的影响以及氧煤比变化对于渣层厚度的影响

并简要分析了水冷壁气化炉和耐火砖气化炉的差异。研究结果表明:大粒径颗粒易于被壁面捕捉

利于穹顶和直筒段渣层的形成

但不利于碳转化率的提高;小粒径颗粒具有高碳转化率

是下游细灰的主要来源

容易加剧下游受热面和灰黑水系统的负担;水冷壁气化炉内形成的固态渣层是气化炉热阻的主要组成部分

能够起到"以渣抗渣"的作用。

Abstract

A slag flow model was developed for the membrane wall gasifier by coupling the 3D gasifier model

the one-dimensional slag model and the particle trap model. The influence of particle behavior and O/C (ratio of oxygen to coal) on slagging of gasifier was demonstrated. Differences between membrane wall gasifier and refractory wall gasifier were shown. The larger particle benefited the capture efficiency and formation of slag layer

while the smaller one favored high carbon conversion. The thermal resistance of solid slag layer accounted for a large proportion in the membrane wall gasifier

thus it could protect silicon carbide layer and membrane wall from thermal corrosion.

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