硫磺回收装置钠法烟气脱硫常见问题及优化方案

Common Problems and Optimization Scheme of Sodium Flue Gas Desulfurization in Sulfur Recovery Unit

随着环保要求不断升级,国家和地方政府对硫磺回收装置烟气SO2控制要求越来越严格。为了控制硫磺回收装置烟气SO2浓度,部分装置增设钠法脱硫设施。该工艺脱硫效果可靠,运行稳定,但也存在一些问题。主要有以下几点:(1)排放口SO2浓度检测不准。(2)烟气脱硫单元与硫磺回收装置负荷不匹配。(3)外排废水COD不达标。

With the continuous upgrading of environmental protection requirements,the national and local governments have more and more strict requirements on SO2 control in sulfur recovery unit.In order to control the SO2 concentration in flue gas of sulfur recovery unit,sodium desulfurization facilities are added in some units.The desulfurization effect of the process is reliable and stable,but there are some problems.The main points are as follows:(1)the detection of SO2 concentration at the outlet is not accurate.(2)The load of FGD unit and sulfur recovery unit does not match.(3)The COD of discharged wastewater is not up to standard.