双流体喷雾冷却在铜冶炼阳极炉烟气降温中的应用

Application of Two Fluid Spray Cooling in Flue Gas Cooling of Copper Smelting Anode Furnace

铜冶炼阳极炉产出的烟气温度和烟气量波动较大,导致热容量变化剧烈,需要降温才能进入后续的收尘系统。基于此特点,本文介绍一种双流体压缩空气喷雾冷却技术,含尘的高温烟气从冷却塔顶部进入,与充分雾化的液滴顺流接触,液滴在塔内高温烟气行进过程中被迅速汽化,显热换为水蒸发潜热,烟气急冷后从底部经排气口流出。系统配置了自控泵站,为喷枪提供带有一定压力的水和压缩空气,根据冷却塔烟气进出口温度、喷水流量、压力等信号,实时计算与控制,保证烟气出口温度稳定在设置的目标范围内。经白银有色集团铜冶炼技术提升改造工程阳极炉生产实际验证,总体布置合理,工艺流程顺畅,温度调节范围大,冷却塔底部无漏水、各种技术指标达到设计要求。

The temperature and volume of flue gas produced by copper smelting anode furnace fluctuate greatly,resulting in drastic changes in heat capacity,which requires cooling before entering the subse-quent dust collection system.Based on this feature,this paper introduces a dual fluid compressed air spray cooling technology.The dusty high-temperature flue gas enters from the top of the cooling tower and contacts with the fully atomized droplets downstream.The droplets are vaporized rapidly during the travel of the high-temperature flue gas in the tower,and the sensible heat is replaced by the latent heat of water evaporation.After the flue gas is quenched,it flows out from the bottom through the exhaust port.The system is equipped with an automatic pump station to provide water and compressed air with a certain pressure for the spray gun.According to the flue gas inlet and outlet temperature of the cooling tower,water spray flow,pressure and other signals,real-time calculation and control are carried out to ensure that the flue gas outlet temperature is stable within the set target range.The actual production verification of anode furnace in the copper smelting technology upgrading and transformation project of Baiyin Nonfer-rous Metals Group shows that the overall layout is reasonable,the process flow is smooth,the temperature regulation range is large,there is no water leakage at the bottom of the cooling tower,and various techni-cal indicators meet the design requirements.