摘要
铜精矿闪速熔炼过程中会产生高温烟气,正常运行时高温烟气经余热锅炉回收余热后进入沉尘室及电收尘器进行净化,净化后的烟气由高温排风机送入制酸工序,锅炉或后续工艺设备故障时,闪速炉高温烟气需由事故烟道急冷后送入后续收尘脱硫系统。基于此工艺流程及特点,本文研制了一种闪速炉事故烟道用喷雾冷却箱,高温烟气从箱体底部进入,垂直向上流动,雾化后的液滴通过喷嘴垂直向下迎着烟气来流方向喷出,两者逆流全方位接触、混合、换热,微小液滴在烟气高温作用下中迅速蒸发、汽化,烟气的显热转化为水蒸汽潜热,使烟气温度急冷到要求温度后经顶部排气口流出。经某有色集团铜冶炼技术提升改造工程闪速炉生产实际验证,总体布置合理,工艺流程顺畅,冷却箱内无液态水,各种技术指标达到设计要求。
High-temperature flue gas will be generated in the flash smelting process of copper concentrate.During normal operation,the high-temperature flue gas is recovered by the waste heat boiler and enters the dust chamber and electric dust collector for purification.The purified flue gas is sent to the acid making process by the high-temperature exhaust fan.In the event of a boiler or subsequent process equipment failure,the high-temperature flue gas from the flash furnace needs to be rapidly cooled by theaccident flue and sent to the subsequent dust collection and desulfurization system.Based on the process flow and characteristics,the paper developed a spray cooling box for flash furnace emergency flue.High temperature flue gas enters from the bottom of the box and flows vertically upward.The atomized droplets are sprayed vertically downward through the nozzle and downward in the direction of flue gas flow.The two countercurrent contact,mix,and exchange heat in all directions.The tiny droplets quickly evaporate and vaporize under the effect of high temperature of flue gas.The sensible heat of flue gas is converted into latent heat of water vapor,which makes the flue gas temperature rapidly cool to the required temperature and then flow out through the top exhaust port.Through the practical verification of the flash furnace production in the copper smelting technology improvement and renovation project of a certain non-ferrous group,the overall layout is reasonable,the process flow is smooth,there is no liquid water in the cooling box,and various technical indicators meet the design requirements.
作者
汤晓勇
豆龙
TANG Xiaoyong;DOU Long(Changsha Institute of Mining Research Co.,Ltd.,Changsha 410012,China)
出处
《有色设备》
2025年第4期94-99,共6页
Nonferrous Metallurgical Equipment
关键词
铜冶炼
闪速炉
事故烟道
高温烟气
喷雾冷却箱
copper smelting
flash furnace
accident flue
high temperature flue gas
spray cooling box
