[Ten years of major development in chemical technology] 032-2021 The country’s first large-scale domestic sulfur-containing waste alkali wet oxidation device was successfully put into operation

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The country's first large-scale domestic sulfur-containing waste alkali wet oxidation device was successfully put into operation. On December 15, 2021, Sinopec's "Ten Dragons" scientific and technological research project "Million-ton ethylene supporting sulfur-containing waste alkali wet oxidation technology development and industrial testing" device was successfully put into operation, marking a new breakthrough in China's wastewater treatment technology. This device is the first waste alkali wet oxidation device supporting a large-scale ethylene device developed using localized independent technology in China. It is led by Zhenhai Refining and Chemical, and is jointly tackled by Dalian Petrochemical Research Institute, Sinopec Engineering Construction Co., Ltd., East China University of Science and Technology and other units. In December 2020, it was selected as one of Sinopec’s “Ten Dragons” scientific and technological projects. This device has three major features: First, it has greater capabilities, realizing the large-scale application of domestic waste alkali treatment technology for the first time. Second, the efficiency is higher, and the sulfide treatment effect of waste alkali solution is increased by more than 5 times. Third, investment is more economical. The investment cost of the same scale is more than 50% lower than that of imported technology. At present, domestic refining and chemical enterprises have large emissions of waste alkali liquid from ethylene production, high concentrations of sulfide and COD, and poor biodegradability. This has become the last hurdle to be overcome for the complete localization of million-ton ethylene projects. The successful commissioning of this device broke Siemens' long-term monopoly in this field in the country and truly achieved the goal of "Chinese technology to control China's wastewater". At this point, Sinopec has independently developed a large-scale domestic waste alkali wet oxidation treatment complete set of technologies.