燃煤链条炉掺烧半焦NO<sub>x</sub>生成特性及配风优化数值模拟研究

王长安; 侯育杰; 刘成昌; 王超伟; 高昕玥; 车得福

doi:10.7652/xjtuxb202204001

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燃煤链条炉掺烧半焦NO_x生成特性及配风优化数值模拟研究

专题清洁燃烧 | 更新时间：2025-07-09

- 燃煤链条炉掺烧半焦NO_x生成特性及配风优化数值模拟研究
- Numerical Simulation Study on NO_x Emission Characteristics and the Optimization of Air Induction of Coal-Fired Chain Boiler Blended with Semi-Coke
- 西安交通大学学报 2022年56卷第4期页码：1-12
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
  
  : 2021-08-27。作者简介: 王长安(1986—),男,副教授。基金项目: 国家重点研发计划资助项目(2017YFB 0602003)
- 基金信息：
  
  : 2021-08-27。作者简介: 王长安(1986—),男,副教授。基金项目: 国家重点研发计划资助项目(2017YFB 0602003);陕西省自然科学基础研究计划资助项目(2019JM-067)
- DOI：10.7652/xjtuxb202204001
  中图分类号： TK16
- 网络首发：2022-04-10，
  
  纸质出版：2022
- 稿件说明：
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王长安, 侯育杰, 刘成昌, 等. 燃煤链条炉掺烧半焦NO_x生成特性及配风优化数值模拟研究[J]. 西安交通大学学报, 2022,56(4):1-12. DOI: 10.7652/xjtuxb202204001.

WANG Chang'an, HOU Yujie, LIU Chengchang, et al. Numerical Simulation Study on NO_x Emission Characteristics and the Optimization of Air Induction of Coal-Fired Chain Boiler Blended with Semi-Coke[J]. 2022, 56(4): 1-12. DOI: 10.7652/xjtuxb202204001.
王长安, 侯育杰, 刘成昌, 等. 燃煤链条炉掺烧半焦NO_x生成特性及配风优化数值模拟研究[J]. 西安交通大学学报, 2022,56(4):1-12. DOI: 10.7652/xjtuxb202204001. DOI：

WANG Chang'an, HOU Yujie, LIU Chengchang, et al. Numerical Simulation Study on NO_x Emission Characteristics and the Optimization of Air Induction of Coal-Fired Chain Boiler Blended with Semi-Coke[J]. 2022, 56(4): 1-12. DOI: 10.7652/xjtuxb202204001. DOI：

摘要

针对煤炭分级分质转换过程中产生的过剩副产品热解半焦

为更加高效清洁的利用煤炭资源

本文提出在链条炉中掺烧热解半焦。使用Fluent软件对链条炉中烟煤与半焦的掺烧工况进行了数值模拟

研究了炉膛内流场、温度场和组分场的变化规律以及配风优化的影响

探讨了掺烧过程中NO

的生成特性以及配风优化对炉内燃烧性能的影响。结果表明

提高半焦的掺混比例

炉膛中NO的体积分数升高

炉膛出口平均烟温降低。推迟配风有助于炉内形成贫氧程度更深的局部还原性区域

从而抑制NO

原始生成

减少炉膛NO

最终排放。层燃室燃复合燃烧时

烟煤在炉排上燃烧的同时将半焦粉末喷入炉膛

半焦比例每增加5%

炉膛出口平均温度约增加30 ℃; 半焦粉末在炉中喉口位置喷入时

炉膛出口烟温最高。本文的研究结果能够为链条炉高效低污染掺烧利用热解半焦等低挥发分煤基固体燃料

提供一定的理论依据和科学指导。

Abstract

To utilize coal resources more efficiently and cleanly

this paper proposes the blending of pyrolysis semi-coke in the chain boiler for the excessive by-products

pyrolysis semicokes

produced in the process of coal classification in quality. Numerical simulations of the blending conditions of bituminous coal and semi-coke in a chain boiler were carried out by using Fluent software. The paper investigates the changing patterns of flow field

temperature field and component field in the boiler and the effect of a

ir distribution optimization

explores the NO

emission characteristics and the effect of air distribution optimization on the combustion performance of the boiler during the blending process. The results show that the concentration of NO in the boiler increases and the average gas temperature at the boiler outlet decreases by increasing the blending ratio of semi-coke. Delaying the air distribution helps to form a local reductive zone with deeper oxygen-deficient in the boiler

thus suppressing the original NO

generation and finally reducing the NO

emission of the boiler. When compound combustion of rate firing-chamber rating is organized

the bituminous coal is burned on the grate while the semi-coke powder is sprayed into the boiler. For each 5% increase in the semi-coke proportion

the average temperature at the boiler outlet increases by about 30 ℃; the highest gas temperature of the furnace outlet is when the semi-coke powder is sprayed in the throat of the boiler. The results of this paper can provide some theoretical basis and scientific guidance for the efficient and low-pollution blending of low volatile coal-based solid fuels such as pyrolysis semi-coke in chain boilers.

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燃煤链条炉掺烧半焦NOx生成特性及配风优化数值模拟研究

Numerical Simulation Study on NOx Emission Characteristics and the Optimization of Air Induction of Coal-Fired Chain Boiler Blended with Semi-Coke

DOI：10.7652/xjtuxb202204001

摘要

Abstract

关键词

Keywords

references

燃煤链条炉掺烧半焦NO_x生成特性及配风优化数值模拟研究

Numerical Simulation Study on NO_x Emission Characteristics and the Optimization of Air Induction of Coal-Fired Chain Boiler Blended with Semi-Coke