干法除尘蒸发冷积灰解决办法探索

Exploring the Solution of Dry Dust Removal Evaporation Cold Ash Accumulation

炼钢厂蒸发冷主要被用于高温烟气冷却,通过控制出口温度满足电除尘要求,以达到除尘、煤气回收效果,然而随着干法除尘系统的使用,蒸发冷内壁积灰、结垢问题逐渐暴露,且行业内未有效解决方案。本文主要对蒸发冷内壁积灰、结垢位置及特点进行探索、分析,并基于CFD流场模拟进行结垢清理方案设计,通过外设振打结构以及调整喷枪伸入量,并通过现场实际测试、验证得到有效解决蒸发冷积灰、结垢的方法。

Evaporative cooling in steel mills is mainly used for high-temperature flue gas cooling.By controlling the outlet temperature to meet the requirements of electric dust removal,dust removal and gas recovery can be achieved.However,with the use of dry dust removal systems,the problems of dust accumulation and scaling on the inner walls of evaporative cooling are gradually exposed,and there are no effective solutions in the industry.This article mainly explores and analyzes the location and characteristics of ash accumulation and scaling on the inner wall of evaporative cooling,and designs a scaling cleaning plan based on CFD flow field simulation.Through external vibration structures and adjusting the penetration of spray guns,effective methods for solving ash accumulation and scaling in evaporative cooling are obtained through on-site testing and verification.