焦炉上升管放散废气扩散规律分析及低能耗高效集气系统设计

赵晨豪; 党小庆; 晋海廷; 马帅; 黄家玉; 吉硕; 郑华春; 屈嘉鑫

doi:10.13205/j.hjgc.202512019

焦炉上升管放散废气扩散规律分析及低能耗高效集气系统设计

doi: 10.13205/j.hjgc.202512019

1. 西安建筑科技大学环境与市政工程学院陕西省环境工程重点实验室, 西安 710055;
2. 河北新兴能源科技股份有限公司, 河北邯郸 056300;
3. 中国环境科学研究院, 北京 100012

基金项目:

陕西省重点研发计划项目（2024SF-ZDCYL-05-06）

详细信息

作者简介:
赵晨豪（2000—），男，硕士研究生，主要研究方向为大气污染控制技术及设备。Zhaoch757699@163.com

通讯作者:
党小庆（1964—），男，博士，教授，主要研究方向为大气污染控制技术及设备。dangxq@163.com

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出版历程
- 收稿日期: 2024-11-29
- 录用日期: 2025-01-10
- 修回日期: 2024-12-20
- 网络出版日期: 2026-01-09

Analysis of dispersion patterns of waste gas emission from coke oven ascension pipes and design of a low-energy， high-efficiency gas collection system

1. Shaanxi Key Laboratory of Environmental Engineering, Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. Hebei Xinxing Energy Technology Co., Ltd., Handan 056300, China;
3. Chinese Research Academy of Environmental Sciences, Beijing 100012, China

摘要

摘要: 低能耗高效地控制焦炉推焦前晾炉过程所产生的高温含尘烟气的无组织排放，是焦化行业超低排放亟待解决的难题。针对某焦化厂现有上升管废气收集系统收集效率低、运行能耗高的问题，采用数值模拟方法对上升管放散废气扩散规律进行分析，优化废气收集系统提高烟尘收集效率，并提出基于PLC的自动化控制系统。结果表明：现有废气收集系统集气罩吸入速度衰减幅度较大，烟尘逸散严重，收集率为40%；增设屋顶集气仓室能够缓冲烟气流速，在设计风量下可实现对烟尘的100%收集；相较于单个集气罩运行，2个集气罩同时运行能够有效抑制烟尘向两侧逸散，集气罩所需排风量更小；PLC系统结合焦炉推焦串序可实现上升管废气收集系统全自动智能化控制，废气收集系统风量由8×10⁵ m³/h减少至1.6×10⁵ m³/h，系统能耗降低80%。该研究可为低能耗高效控制上升管废气逸散提供参考。
- 焦炉上升管 /
- 流场特性 /
- 废气收集系统 /
- 收集效率 /
- PLC /
- 节能减排
Abstract: The low-energy， high-efficiency control of fugitive emissions from high-temperature， dust-laden gas generated during the capping and airing processes before coke pushing into coke ovens， is a pressing challenge that needs to be addressed for achieving the ultra-low emissions in the coking industry. This study was focused on a specific coking plant equipped with a low-efficiency， waste gas collection system for ascension pipes， to address the issues of low collection efficiency and high energy consumption in its existing ascension pipe waste gas collection system. A numerical simulation-based method was employed to analyze the diffusion patterns of waste gas emissions from the ascension pipes and optimize the waste gas collection system to improve dust collection efficiency. Based on the results， an automated control system based on programmable logic controller （PLC） was developed. The results indicated that the currently operational waste gas collection hood was 4 meters from the ascension pipe's central axis. The velocity of the hood decreased dramatically， causing the dust to disperse after reaching the furnace hood， resulting in a collecting efficiency of only 40%. Adding a roof collection chamber ensured the emergency venting function while buffering gas flow velocity. Positioning the collection hood on one side of the roof collection chamber， and decreasing the distance between the hood and the central axis of the ascension pipe to 1.6 meters， enabled 100% dust collection from the ascension pipe at an airflow of 3.3×10⁴ m³/h. In Work Mode 1， dust collection effectiveness got improved with the growing of waste air volume of the collecting hood. Dust was effectively kept from spreading sideways in Work Mode 2 by positioning the collection hood on both ends of the ascension pipe. Dust was entirely collected at an exhaust rate of 4×10⁴ m³/h， except for ascension pipes 1-4. The PLC system associated with the coke oven pushing schedule provides entirely automated intelligent control of the gas collection system. The airflow rate of the system was reduced from 8×10⁵ m³/h to 1.6×10⁵ m³/h， resulting in an 80% reduction in energy consumption. This research provides insights for the efficient， low-energy control of waste gas dispersion from ascension pipes and offers a practical reference for addressing the ultra-low emissions challenge in the coke industry.
- coke oven ascension pipe /
- flow field characteristics /
- waste gas collection system /
- collection efficiency /
- PLC /
- energy conservation and emission reduction

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