航天炉真空闪蒸汽余热供热利用技术改造实践

Technical Revamping on HT-L Furnace Vacuum Flash Steam Waste Heat Supply

航天炉在运行过程中,渣水闪蒸系统的真空闪蒸汽被循环水冷凝,热量没有利用,为利用这部分高品位热量,对真空闪蒸汽余热进行了利用改造。介绍了真空闪蒸汽余热供热系统的工艺改造方案及改造后的工艺流程,分析了航天炉余热供热改造的创新点。生产运行表明,某公司改造后的余热供热系统,供水温度在70℃~80℃,供暖季回收热量22.75GJ,节煤1.75万t,减排CO21.6万t、SO260t。

During the operation of HT-L furnace, the heat of vacuum flash steam in slag-water flash system was not utilized. In order to utilize this high-grade heat, the renovation was made for vacuum flash steam waste heat utilization. The process improvement scheme of vacuum flash steam waste heat supply and the subsequent process flow were introduced. Also, the innovation points of the HT-L furnace waste heat supply renovation were analyzed. The production operation showed that in a company, after the revamping, the water supply temperature was 70 ℃-80 ℃, heat recovery during the heating season was 22.75 GJ, and coal saving was 17 500 t, with emission reduction of 16 000 t CO2 and 60 t SO2.