黑体材料在炼焦炉上升管余热回收增效中的应用研究

Study on efficiency enhancement of waste heat recovery of coke oven riser with blackbody material

焦炉荒煤气带出的热量占焦炉总热量支出的三分之一多,其回收利用具有重要的节能增效价值。介绍了黑体材料的特性及辐射传热的工作原理,通过利用Fluent模拟软件进行数值模拟计算和实施中试试验,从理论和试验两方面研究了黑体材料在炼焦炉上升管余热回收中的应用。结果表明,利用黑体材料对辐射热量的高吸收特点,在上升管换热器内壁涂覆高性能黑体材料,可以使上升管换热器相对常规换热器平均小时产汽量提高9.9%左右,从而达到高效节能的目的。

The heat from coke oven raw gas accounts for more than one third of the total heat generation of coke oven,and its recycling has important value in saving energy and increasing efficiency.The characteristics of blackbody material and the working principle of radiation heat transfer were introduced.By numerical simulation calculation with FLUENT simulation software and through pilot test,the application of blackbody material in the recovery of waste heat from coke oven riser was studied theoretically and experimentally.The results showed that based on the high radiation heat absorption of the blackbody material,when the blackbody material was coated to the inner wall of the riser heat exchanger,the average hourly steam production of the riser heat exchanger could be increased by around 9.9%compared with that of the conventional heat exchanger,so as to achieve the purpose of efficiency enhancement and energy saving.