Experimental Study on Lean Coal and Gas  Combined Combustion Boiler

YI Zheng ming; HU Xu man; ZHOU Zheng; TAO Qian; XIAO Hui; JIANG Zhi wei

doi:10.15938/j.jhust.2020.03.016

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Experimental Study on Lean Coal and Gas Combined Combustion Boiler

更新时间：2026-08-31

- Experimental Study on Lean Coal and Gas Combined Combustion Boiler
- Vol. 25, Issue 3, Pages: 102-108(2020)
- 作者机构：
  
  1. 武汉科技大学钢铁冶金新工艺湖北省重点实验室,武汉,430081
  2. 武汉科技大学钢铁冶金与资源利用省部共建教育部重点实验室,武汉,430081
  3. 武汉科技大学高温材料与炉衬技术国家地方联合工程研究中心,武汉,430081
- 作者简介：
- 基金信息：
- DOI：10.15938/j.jhust.2020.03.016
  CLC： TK22991
- Published：2020
- 稿件说明：
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YI Zheng ming, HU Xu man, ZHOU Zheng, et al. Experimental Study on Lean Coal and Gas Combined Combustion Boiler[J]. 2020, 25(3): 102-108.
DOI：

YI Zheng ming, HU Xu man, ZHOU Zheng, et al. Experimental Study on Lean Coal and Gas Combined Combustion Boiler[J]. 2020, 25(3): 102-108. DOI： 10.15938/j.jhust.2020.03.016.

摘要

为了研究掺烧对锅炉排烟温度、过热蒸汽温度、飞灰和灰渣含碳量以及锅炉热效率的影响，并提出相应的运行优化方式，对某钢厂75t/h混烧锅炉分别进行了焦炉煤气与煤粉混烧、全燃高炉煤气与焦炉煤气以及高、焦炉煤气和煤粉混烧的燃烧试验。结果表明：锅炉混烧焦炉煤气与煤粉时，锅炉热效率能够达到827%，但不利于企业煤气平衡；锅炉全燃高炉煤气与焦炉煤气时，锅炉热效率能够达到852%，但只能维持较低负荷运行；在燃用实际贫煤条件下，锅炉混烧高、焦炉煤气与煤粉，当三者热值比分别为35%、35%与30%时，排烟温度、飞灰含碳量和灰渣含碳量较改造前分别下降了45℃、106%和109%，热效率为7721%，优化后较优化前减少燃料消耗与节煤率分别为2261kg/h和33%。

Abstract

Abstract:In order to study the effects of blending ratio onexhaust temperature

superheated steam temperature

carbon content in fly ashand slag

and boiler thermal efficiency

and put forward the correspondingoperation optimization method

mixed combustion experiments of COG (coke ovengas) with coal

BFG (blast furnace gas) with COG

and coal

BFG with COG wereperformed in a 75t/hcombined combustion boiler

respectively The results show that the boilerthermal efficiency can reach 827% under the condition of mixed combustion ofCOG and coal

but the operating mode is not economical for the gas balance ofplant When burning BFG and COG in the boiler

the boiler thermal efficiency canreach 852% but low loading operation After the mode of 35% BFG heat value

35%COG heat value and 30% lean coal heat value is applied in the boiler

theexhaust temperature

carbon content in fly ash and slag decreases by 45℃

106% and 109%

respectively The boiler thermal efficiency is 7721% Moreover

the fuel consumption reduces by 2261kg/h and the coal saving ratio is 33%

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