铜冶炼多段余热三级叠加高效利用实践

Practice of Efficient Utilization of Multi-stage Waste Heat in Copper Smelting by Three-stage Superposition

本文以某公司为例,遵循匹配用能和能量梯级利用原则,详细介绍了铜冶炼各工序余热回收利用方式,获得的过热蒸汽进入余热发电系统发电将蒸汽热能转换为电能使用,为避免因冶炼系统工艺作业变化导致进入汽轮机发电的蒸汽品位变化,在汽轮机前增设了蓄热装置,通过以上余热的三级叠加利用发电,吨蒸汽发电量达到200 kW·h/t蒸汽。

Taking a company as an example,following the principles of matching energy utilization and energy cascade utilization,this paper introduces the recovery and utilization mode of waste heat in each procedure of copper smelting in details.The obtained superheated steam enters the waste heat power gen-eration system to generate electricity,thus the steam heat energy is converted into electric energy.In or-der to avoid the change of steam grade entering the steam turbine due to the change of process operation in smelting system,a heat storage device is added before the steam turbine.Through the three-stage su-perposition utilization of the above waste heat,the power generation can reach 200 kW·h/t steam.