doi:10.16597/j.cnki.issn.1002-154x.2026.01.008
基于焦炉煤气取热量计算的焦炉上升管余热回收技术研究
付 强∗ 张静波
（宝武集团鄂城钢铁有限公司，鄂州 436002）
摘 要以某厂2×70 孔JN55-90 型焦炉为研究对象,对其上升管余热回收技术进行了深入研究｡针对该焦炉构建了一套专为年产80 万t 焦炭生产设计的实验装置,该装置通过增设保温套筒与螺旋形热交换管,利用熔盐混合物与导热油作为热载体介质,有效回收焦炉上升管中高温荒煤气中的余热｡实验考虑焦炉上升管的传热特性及管内煤气传热机制,计算了焦炉煤气的取热量｡装置采用双层同轴套管结构,其中软化水吸收荒煤气热量转化为高温汽水混合物,分离出的蒸汽用于热能供应,饱和水则循环使用｡实验结果表明,随着焦炉煤气取热量的增加,烟气出口温度逐渐上升,余热回收效率也相应提高｡在设定的1 000 kW 取热量条件下,烟气出口温度稳定达到900 ℃,余热回收效率稳定在68%｡研究表明,焦炉上升管余热回收技术能够有效回收并利用高温荒煤气中的余热,提高能源利用效率,减少能源浪费｡
关键词焦炉荒煤气；CO₂；取热量计算；上升管；余热回收；炼焦周期
Research on Waste Heat Recovery Technology of Coke Oven Riser Based on Heat Extraction Calculation of Coke Oven Gas
FU Qiang∗ ZHANG Jingbo
(Echeng Iron and Steel Co., Ltd. of Baowu Group, Ezhou 436002, China)
Abstract Taking 2×70 hole JN55-90 coke oven as the research object, an in-depth research on its riser waste heat recovery technology was carried out. A set of experimental equipment specially designed for the annual output of 800 kt coke was constructed. By adding thermal insulation sleeves and spiral heat exchange tubes, and using molten salt mixture and heat conduction oil as heat carrier media, the waste heat of high-temperature raw gas in coke oven riser was effectively recovered. Considering the heat transfer characteristics of coke oven riser and the heat transfer mechanism of gas in the tube, the heat extraction of coke oven gas was calculated. The device adopts double-layer coaxial sleeve structure. The softened water absorbs heat from raw gas and turns into high-temperature steam-water mixture. The separated steam is used for heat energy supply, and the saturated water is recycled. The experimental results show that with the increase of heat extraction of coke oven gas, the flue gas outlet temperature rises gradually and the waste heat recovery efficiency increases accordingly. Under the set heat extraction condition of 1 000 kW, the flue gas outlet temperature stably reaches 900 ℃ and the waste heat recovery efficiency is stably maintained at 68%. The research proves that the waste heat recovery technology of coke oven riser can effectively recover and utilize the waste heat in high-temperature raw gas, improve energy utilization efficiency and reduce energy waste.
Keywords coke oven raw gas; CO₂; heat extraction calculation; ascending pipe; waste heat recovery; coking cycle