焦化厂上升管余热回收利用技术研究

Research on Waste Heat Recovery and Utilization Technology for Risers in Coking Plants

传统焦炉生产工艺荒煤气余热没有加以利用,造成能源浪费。针对120万t/a焦化项目5.5 m捣固焦炉的结构特点,提出了一种“上升管余热回收利用”的改造方案,安装余热回收设备重新回收余热用于生产低压饱及蒸汽及过热蒸汽,并利用蒸汽完全替代粗苯管式炉。研究结果表明:改造方案可以节省大量煤气,减少冷却水消耗,同时解决了燃烧排放问题和明火燃烧的安全隐患。用蒸汽替代粗苯管式炉后,不再向空气直接排放氮氧化物和粉尘颗粒物,既是节能项目,又是安全环保项目,可为同类焦化行业提供参考。

In traditional coke oven production processes,the waste heat from coke oven gas is not utilized,leading to energy wastage.For the structural characteristics of the 5.5 meter ramming coke oven in the 1.2 million t/a coke project,a retrofit scheme of"waste heat recovery and utilization for risers"is proposed.Waste heat recovery equipment is installed to reutilize the waste heat for producing low-pressure saturated steam and superheated steam,completely replacing the crude benzene tube furnace with steam.The research results indicate that the retrofit scheme can save a considerable amount of gas and reduce cooling water consumption.It also addresses combustion emission issues and safety hazards associated with open flame combustion.After replacing the crude benzene tube furnace with steam,nitrogen oxides and particulate matter are no longer directly emitted into the air.This project is not only an energy-saving project but also a safety and environmental protection project.It can serve as a reference for similar coking enterprises.