Operation Analysis And Control Optimizing For WSA Acid Gas Recovery Process

With the expanding of coal-chemical industry and the utilization of high-sulfur coal, the recovery of acid gas is becoming more and more pressing. Most domestic units used for acidic gas processing and recovery are of low capacity and can not fullfill the requirements of environmental protection. Technologies and principles of different units applied in coal-chemical industry are studied in order to draw a universal conclusion. The most important control targets are set up based on the analysis of the operation conditions of the WSA acid gas recovery unit in Shanghai Coking & Chemical Corporation. Suggestions for improving the producing process are made after data collection, principle analysis and operating optimization.The key factors that affect the operation of the WSA acid gas recovery unit are the componet of the feed gas, the emission and the control of the O2 and acid mist. The recovery rate of sulfur, the operation load of the unit and the safty and steady of the plant are all related to the factors mantioned above.Through camparing the parameters and digitals before and after optimizing, a fessible scheme can be made. It is shown that the operating load and period as well as the key control factors of the optimized plant are apparently improved.The conclusions drawed from this paper can be a guidance for the operation and domestication of similar units.