调节入口气速优化焦炉立火道内燃烧过程

doi:10.16085/j.issn.1000-6613.2024-1510

化工进展 ›› 2025, Vol. 44 ›› Issue (11): 6153-6160.DOI: 10.16085/j.issn.1000-6613.2024-1510

• 化工过程与装备 • 上一篇

调节入口气速优化焦炉立火道内燃烧过程

张明钰¹(), 邱丽¹, 崔长青², 田辉², 刘宏钊², 杨景轩¹^,³(), 张忠林¹^,³, 郝晓刚¹^,³, 阿布里提null⁴

^1.太原理工大学化学与化工学院，山西太原 030024
^2.中化学赛鼎焦化（山西）工程科技有限公司，山西太原 030032
^3.山西科化技术服务有限公司，山西太原 030027
^4.日本国立弘前大学理工学部，青森弘前 036-8224

收稿日期:2024-09-14 修回日期:2024-10-29 出版日期:2025-11-25 发布日期:2025-12-08
通讯作者: 杨景轩
作者简介:张明钰（1996—），女，硕士研究生，研究方向为碳资源清洁转化工艺及装备、多相流动、传递和分离过程及装备。E-mail：zmy970972296@163.com。
基金资助:
国家自然科学基金(22378285);山西省基础研究计划(202203021211164);中化学赛鼎焦化(山西)工程科技有限公司项目(RH2300000743);山西科化技术服务有限公司项目(20210507);国家留学基金委2022年度西部地区人才培养特别项目;地方合作项目地方创新子项目

Optimizing the combustion process in the vertical fire passage of a coke oven by adjusting the inlet gas velocity

ZHANG Mingyu¹(), QIU Li¹, CUI Changqing², TIAN Hui², LIU Hongzhao², YANG Jingxuan¹^,³(), ZHANG Zhonglin¹^,³, HAO Xiaogang¹^,³, ABULITI ⁴

^1.School of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
^2.Sinochem Saiding Coking (Shanxi) Engineering Technology Co. , Ltd. , Taiyuan 030032, Shanxi, China
^3.Shanxi Chemical Technology Service Co. , Ltd. , Taiyuan 030027, Shanxi, China
^4.Faculty of Science and Technology, Hirosaki University, Hirosaki 036-8224, Aomori, Japan

Received:2024-09-14 Revised:2024-10-29 Online:2025-11-25 Published:2025-12-08
Contact: YANG Jingxuan

摘要/Abstract

摘要：

焦炉立火道内的燃烧过程包含流动、热质传递及反应，但现有研究多关注燃烧特性，较少涉及流动及传递对反应特性的调控。本文采用计算流体力学（CFD）方法研究高炉煤气和二段空气入口速度对某大型焦炉立火道内流动、传递和燃烧过程的影响。结果表明，适当提高煤气入口速度可以强化传质，促进空气与煤气的混合，降低局部最高温度，减少NO _x 产出的同时增强高向温度分布的均匀性。最佳的煤气入口速度约4.22m/s。在此条件下，二段空气入口速度约1.25m/s时高向各截面的平均温度最高。在此基础上适当提高二段空气入口速度能够降低NO _x 产出，且不会显著恶化燃烧情况，对高向温度分布均匀性影响较小。调节入口速度优化燃烧的主要机制在于：调节入口速度可以改变湍流状态，合理控制速度优化湍流结构，从而增强改善煤气和空气混合，最终优化燃烧效果。

关键词: 焦化, 氮氧化物, 气速, 传递过程, 计算流体力学, 燃烧模拟

Abstract:

The combustion process within the vertical fire passage of a coke oven encompasses flow, heat and mass transfer, as well as chemical reactions. However, existing research predominantly emphasizes combustion characteristics while neglecting the influence of flow and transfer on reaction dynamics. This study employs computational fluid dynamics (CFD) to investigate the effects of blast furnace gas and second-stage air inlet velocity on the flow, transfer, and combustion processes in a large coke oven’s vertical fire passage. The findings indicate that increasing gas inlet velocity enhances mass transfer, facilitates better mixing of air and gas, lowers local maximum temperatures, reduces NO _x emissions, and improves temperature uniformity across high-temperature regions. The optimal gas inlet speed is approximately 4.22m/s; under these conditions, the average temperature at each section in the upward direction peaks when the second-stage air inlet speed is around 1.25m/s. Furthermore, a judicious increase in second-stage air inlet speed can diminish NO _x emissions without significantly deteriorating combustion performance or adversely affecting temperature distribution uniformity. The primary mechanism for optimizing combustion through adjustments in inlet speed lies in its ability to alter turbulent states, effectively controll velocities and refine turbulent structures, which ultimately enhances mixing between gas and air thereby improving overall combustion efficiency.

Key words: coking, nitrogen oxides, gas velocity, transport processes, computational fluid dynamics, combustion simulation

中图分类号:

TQ522.16

张明钰, 邱丽, 崔长青, 田辉, 刘宏钊, 杨景轩, 张忠林, 郝晓刚, 阿布里提null. 调节入口气速优化焦炉立火道内燃烧过程[J]. 化工进展, 2025, 44(11): 6153-6160.

ZHANG Mingyu, QIU Li, CUI Changqing, TIAN Hui, LIU Hongzhao, YANG Jingxuan, ZHANG Zhonglin, HAO Xiaogang, ABULITI . Optimizing the combustion process in the vertical fire passage of a coke oven by adjusting the inlet gas velocity[J]. Chemical Industry and Engineering Progress, 2025, 44(11): 6153-6160.

图/表 15

参考文献 31

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结构	尺寸/mm
立火道长度	358
立火道高度	5945
二段空气入口长度	232
跨越孔高度	450（大），108（小）
立火道宽度	846
隔墙厚度	180
二段空气入口宽度	30
循环孔高度	120

结构	尺寸/mm
立火道长度	358
立火道高度	5945
二段空气入口长度	232
跨越孔高度	450（大），108（小）
立火道宽度	846
隔墙厚度	180
二段空气入口宽度	30
循环孔高度	120

成分	体积分数/%
CO	26.78
H₂	2.58
CH₄	0.19
O₂	0.29
CO₂	10.52
H₂O	4.36
N₂	55.28

成分	体积分数/%
CO	26.78
H₂	2.58
CH₄	0.19
O₂	0.29
CO₂	10.52
H₂O	4.36
N₂	55.28

高炉煤气	指前因子（PEF）	活化能（AE）
CH₄	5.012e¹¹	2e⁸
H₂	9.87e⁸	3.1e⁷
CO	2.239e¹²	1.7e⁸

调节入口气速优化焦炉立火道内燃烧过程

Optimizing the combustion process in the vertical fire passage of a coke oven by adjusting the inlet gas velocity

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参考文献 31

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项目	速度/m·s^-1	出口NO _x 浓度/mg·m^-3	高向温度平均值/K	高向温度标准差/K	k/m²·s^-2	ε/m²·s^-3
工况1	1.34	387.14	1579.80	55.84	0.13	0.38
工况2	2.11	330.69	1582.30	58.28	0.15	0.49
工况3	4.22	87.49	1599.42	49.42	0.29	1.65
工况4	8.48	22.94	1579.82	49.52	0.60	7.99

项目	速度/m·s^-1	出口NO _x 浓度/mg·m^-3	高向温度平均值/K	总体标准差/K	k/m²·s^-2	ε/m²·s^-3
工况3	1.25	87.49	1599.42	49.42	0.29	1.65
工况5	1.70	61.58	1588.04	48.81	0.25	1.60
工况6	1.14	82.16	1585.10	47.49	0.27	1.65
工况7	0.97	84.15	1586.61	50.55	0.28	1.68

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