耦合显热回收过程的Shell气流床粉煤气化过程模拟研究

doi:10.12096/j.2096-4528.pgt.19165

发电技术 ›› 2021, Vol. 42 ›› Issue (2): 254-260.DOI: 10.12096/j.2096-4528.pgt.19165

耦合显热回收过程的Shell气流床粉煤气化过程模拟研究

吴阳(), 汪大千(), 赵创(), 杨海平(), 王贤华(), 张世红(), 陈汉平()

煤燃烧国家重点实验室(华中科技大学), 湖北省武汉市 430074

收稿日期:2020-03-20 出版日期:2021-04-30 发布日期:2021-04-29
通讯作者: 杨海平
作者简介:吴阳(1995), 男, 硕士研究生, 主要研究方向为加压气流床的模拟等, 18852854190@163.com
汪大千(1991), 男, 博士研究生, 主要从事生物质、煤的气化研究, dqxqsj@163com
赵创(1997), 男, 硕士研究生, 主要研究方向为高温高压煤气化技术, zhao_chuang@hust.edu.cn
王贤华(1978), 男, 博士, 副教授, 主要从事生物质热化学转化、生物质基产品开发等方面的研究, wangxianhua@hust.edu.cn
张世红(1966), 男, 教授, 博士生导师, 从事化石燃料、生物质、固废等高效、清洁热化学转化的研究工作, shzhang@hust.edu.cn
陈汉平(1962), 男, 教授, 博士生导师, 从事流化床燃烧理论与技术、煤及生物质(包括固废)的高效转化与资源化利用、热力设备与系统节能减排新工艺和新技术的研究, hp.chen@163.com
基金资助:
国家重点研发计划项目(2017YFB0602701-02)

Simulation of Shell Entrained-flow Pulverized Coal Gasification Progress in Coupling With Sensible Heat Recovery

Yang WU(), Daqian WANG(), Chuang ZHAO(), Haiping YANG(), Xianhua WANG(), Shihong ZHANG(), Hanping CHEN()

State Key Laboratory of Coal Combustion (Huazhong University of Science & Technology), Wuhan 430074, Hubei Province, China

Received:2020-03-20 Published:2021-04-30 Online:2021-04-29
Contact: Haiping YANG
Supported by:
National Key Research and Development Program of China(2017YFB0602701-02)

摘要/Abstract

摘要：

为优化Shell气化炉的气化性能，利用Aspen Plus软件建立了Shell气流床粉煤气化过程的平衡模型，包括热解、燃烧、气化、冷煤气激冷与废热锅炉显热回收4个模块，研究了氧煤比和水蒸气煤比对Shell气化炉气化性能的影响。结果表明：随着氧煤比的增加，H₂和CH₄含量降低，CO₂含量先缓慢增加后快速增加，CO含量和冷煤气效率呈现先增加后减小的趋势；随着水蒸气煤比的增加，H₂和CO₂含量增加，CO和CH₄含量下降，冷煤气效率先迅速增加而后缓慢下降；神府煤最佳的氧煤比和水蒸气煤比分别为0.86和0.05。

关键词: 煤气化, Shell气化炉, 气流床, 显热回收, 氧煤比, 水蒸气煤比

Abstract:

To optimize the gasification performance of Shell gasifier, the balance model of Shell entrained-flow pulverized coal gasification process was established by using Aspen Plus software. Four modules were mainly investigated, including pyrolysis, combustion, gasification, cold gas chilling and sensible heat recovery of waste heat boiler. The impacts of oxygen/coal ratio and steam/coal ratio on the gasification performance of Shell gasifier were investigated. The results show that with the increase of oxygen/coal ratio, the concentration of H₂ and CH₄ decreases, the concentration of CO₂ increases slowly and then increases rapidly. The concentration of CO and cold gas efficiency increase first and then decrease. With the increase of steam/coal ratio, the concentration of H₂ and CO₂ increases, the concentration of CO and CH₄ decreases, the efficiency of cold gas increases rapidly and then decreases slowly. The optimal ratio of oxygen/coal and steam/coal of Shenfu coal is 0.86 and 0.05 respectively.

Key words: coalgasification, Shell gasifier, entrained-flow bed, sensible heat recovery, oxygen/coal ratio, steam/coal ratio

中图分类号:

TK16

吴阳, 汪大千, 赵创, 杨海平, 王贤华, 张世红, 陈汉平. 耦合显热回收过程的Shell气流床粉煤气化过程模拟研究[J]. 发电技术, 2021, 42(2): 254-260.

Yang WU, Daqian WANG, Chuang ZHAO, Haiping YANG, Xianhua WANG, Shihong ZHANG, Hanping CHEN. Simulation of Shell Entrained-flow Pulverized Coal Gasification Progress in Coupling With Sensible Heat Recovery[J]. Power Generation Technology, 2021, 42(2): 254-260.

图/表 5

图1 Shell气化炉模拟计算流程图

Fig.1 The simulation flow diagram of Shell entrained-flow gasifier

表1 煤样的工业分析和元素分析

Tab. 1 Coal proximate analysis and ultimate analysis

煤样	工业分析/%				元素分析/%
煤样	M	V	A	FC	C	H	N	S	O
SF	10.19	31.62	5.84	52.35	68.84	5.06	0.91	0.28	8.88

表2 模拟值与文献值对比

Tab. 2 Comparison of simulated values and literature values

项目	H₂体积分数/%	CO体积分数/%	CO₂体积分数/%
文献值	28.72	64.23	1.20
模拟值	28.21	71.47	0.21

图2 氧煤比对气化性能的影响

Fig.2 Effect of oxygen/coal ratio on gasification performance

图3 水蒸气煤比对气化性能的影响

Fig.3 Effect of steam/coal ratio on gasification performance

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耦合显热回收过程的Shell气流床粉煤气化过程模拟研究

Simulation of Shell Entrained-flow Pulverized Coal Gasification Progress in Coupling With Sensible Heat Recovery

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