焦炉煤气ZL法脱硫脱氰的实践研究

PRACTICAL STUDY ON ZL PROCESS FOR DESULFURIZATION AND DECYANTION

通过对鞍钢焦炉煤气ZL(双核钛氰钴砜十磺酸,是一种脱硫催化剂)法脱硫脱氰6年的生产实践数据进行分析,摸索出脱硫液中最好的硫代硫酸铵、硫氰酸铵和游离氨浓度;确定合理的集合温度,预冷塔、蒸氨塔及循环水凉水架的操作参数.在优化工艺下,1#脱硫塔脱硫效率稳定在40%左右,2#脱硫塔脱硫效率稳定在80%左右,3#脱硫塔脱硫效率稳定在91%左右,ZL法脱硫脱氰三塔总效率达到了98%以上.

The optimization concentration of ammonium thiosulfate, ammonium thiocyanate and free ammonia in desulfurization solutions were selected, better temperature of mixing coke oven gas from preliminarily cool tower was chose and the opration parameters of precooling tower, ammonia distillation tower and circulation water were optimized by analyzing the data of ZL method to desulfuration and dehydrogenization in AG. Under these optimal condition, the desulfuration efficiency of the no. 1, no. 2 and no. 3 remove sulfuration tower achieved 40%, 80% and 91 % respectively, and the total efficiency of desulfuration and dehydrogenization of ZL method achieved 98%.