The Reform And Optimization Of Wet Desulfurization Technology System

Sheng Long desulfurization project has been put into operation for 12 years,The wet FGD process has many advantages,and its operation is stable.Under the condition of new coking and methanol project,In order to protect the two phase methanol production gas,The first stage coke oven was carried out,Surplus part of gas used in methanol production,With the increase of gas production,many problems occurred in the original desulfurization system,The efficiency of hydrogen sulfide removal.High sulfur gas returns to coke oven for combustion heating,Lead to excessive flue gas sulfur dioxide emissions,pollution of the environment;It can also lead to deactivation of methanol catalyst and increase the cost of fine desulfurization,In addition,high sulfur gas and its combustion products can also corrode pipes and equipment.Therefore,the removal of hydrogen sulfide to reduce pollutionAnd protect the production significance,It is urgent to transform the original process.This paper focuses on the process of coke oven gas desulfurization at home and abroad,A brief description of the development of various removal processes is presented.According to the current situation of desulfurization system in our company,And combined with the operating conditions of similar systems around the brothers,It is concluded that the PDS desulfurization process is suitable for our unit.This paper focuses on the selection of equipment,process flow,process parameters,etc,Reforming and adjusting the original process and equipment,The adjustment of desulfurization sequence,Simplify the desulfurization process and increase the PDS catalyst tank,Sulfur foam treatment equipment;According to the test data,adjust the ratio of liquid to gas,Regeneration air volume and regeneration time,Find the best process parameters and fix them.In the system,there is a rapid increase in resistance and a large increase in resistance,Current status of desulfurization efficiency,Improvement of the technology of extracting salt from desulfurization solution,Project under construction,The operation effect needs to be further demonstrated in practice.The desulfurization process was optimized through the transformation,The desulfurization efficiency is improved and the sulfur content of flue gas is reduced,The quality of the gas for methanol production is ensured,and the waste liquid is discharged,Have the economic and social benefits,It can be used as a reference for the optimization of wet FGD in coking enterprises.