Project description: 2*220t/h boiler ammonia desulphurization project of Weifang Special Steel Group is the total package by Jiangnan environmental protection EPC. In operation, due to the very serious problem of flue gas trailing, it was upgraded again by Jiangnan environmental protection in 2015, and the expected effect has not been achieved. Through technical analysis, performance investigation, and repeated demonstration, select our company finally, the project is for three furnaces and one tower of flue gas 1.5 million operating conditions, sulfur dioxide imports 4300 mg / Nm³.The final stage technology of purification and separation was used, and the project was successfully started at one time. The ultra-low emission of Weifang Special Steel Project is the patent technology of our company, which can ensure the ultra-low standard, and reduce the operating cost of the enterprise.