Experimental research on co-firing gasified ash and slag in coal-fired boiler

LIU Aohao; ZHANG Lei; ZHANG He; ZHU Peina; WANG Jiarui; LI Xiaojiang

doi:10.19666/j.rlfd.201911163

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Experimental research on co-firing gasified ash and slag in coal-fired boiler

更新时间：2025-09-28

- Experimental research on co-firing gasified ash and slag in coal-fired boiler
- Thermal Power Generation Vol. 49, Issue 4, Pages: 19-24(2020)
- 作者机构：
  
  1. 华电电力科学研究院有限公司
  2. 武汉锅炉股份有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201911163
  CLC： TQ546
- Published Online：27 March 2020，
  
  Published：2020
- 稿件说明：
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LIU Aohao, ZHANG Lei, ZHANG He, et al. Experimental research on co-firing gasified ash and slag in coal-fired boiler[J]. Thermal power generation, 2020, 49(4): 19-24.
DOI：

LIU Aohao, ZHANG Lei, ZHANG He, et al. Experimental research on co-firing gasified ash and slag in coal-fired boiler[J]. Thermal power generation, 2020, 49(4): 19-24. DOI： 10.19666/j.rlfd.201911163.

摘要

煤气化过程中产生的灰渣具有一定热值

燃煤发电企业对其进行合理利用不仅可以降低经营成本

同时避免了环境污染问题。为深化利用气化灰渣

本文选取气化灰渣和发电企业常用煤种

通过样品灰成分、灰熔融特性以及燃烧特性等分析

开展混烧特性及经济可行性研究。结果表明:气化灰渣经过干燥后

可以与发电企业常用煤种掺混使用;当气化灰渣掺混比例≤30%时

混合燃料软化温度高于机组设计软化温度

理论上可以满足机组安全运行要求;随着气化灰渣掺混比例的增加

混合燃料的着火温度、最大燃烧速率对应温度、燃尽温度均降低

有助于提高混合燃料在锅炉内的燃烧效率

但此时反应激烈程度和最大燃烧速率降低。

Abstract

The slag generated from coal gasification process contains a certain amount of heat value

reasonable utilization of the slag can not only reduce the operating cost of coal-fired power generation enterprises

but also effectively solve the environmental pollution problems. To deepen the utilization of gasified slag

the gasified slag and a coal commonly used in a thermal power generation enterprise were blended to investigate the co-combustion characteristics and economic feasibility

through ash composition analysis

ash fusibility characteristics analysis combustion characteristics analysis. The results show that

the gasified slag can be use after drying. When the blending ratio of the gasified slag was less than 30%

the spherical temperature of the mixed fuel was higher than that of the boiler design coal

the boiler could run safely theoretically. With the increase of the blending ratio of the gasified slag

the combustion characteristic parameters such as ignition temperature

temperature of the maximum combustion rate and burnout temperature all decreased

indicating that increasing the gasified slag proportion could enhance the combustion efficiency of the mixture fuel. However

the reaction intensity and the maximum combustion rate reduced.

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