Recently, Jinneng Technology Co., Ltd.'s method for preparing sulfuric acid from sulfur-containing waste liquid produced by gas wet oxidation method, a coking wastewater advanced treatment process and its treatment system were authorized by the State Intellectual Property Office for invention patents, the device for reducing sulfur dioxide in the chimney of the ground dedusting system in dry quenching environment are authorized by the State Intellectual Property Office for utility model patents.
　　Method for preparing sulfuric acid by using sulfur-containing waste liquid produced by gas wet oxidation method which used sulfur-containing waste liquid produced in production, through pretreatment, incineration and other processes to produce sulfuric acid, and then to produce ammonium sulfate. The method completely solves the pollution problem of coking desulfurization waste liquid, meets the requirements of environmentally friendly clean production process, and has greater social and economic benefits.
　　A coking wastewater advanced treatment process and its treatment system, the coking wastewater is deeply treated, decomposed into distilled water and concentrated liquid, and respectively used for production to realize closed loop and zero discharge of coking wastewater.
　　The device for reducing the sulfur dioxide in the chimney of the ground dedusting system in the dry quenching environment can effectively remove the sulfur dioxide in the chimney, reduce the emission of pollutants, improve the atmospheric environment, and has better social benefits.