Comprehensive treatment method for coking desulfurization waste liquid and flue gas desulfurization wastewater
A technology for coking desulfurization waste liquid and desulfurization wastewater, which is applied in the direction of gaseous effluent wastewater treatment, water/sewage treatment, chemical instruments and methods, etc., and can solve the difficulty of resource utilization and treatment cost of flue gas desulfurization wastewater and coking desulfurization waste liquid Advanced problems, to achieve the effect of broad industrial application prospects, low raw material cost, and simple process flow
Inactive Publication Date: 2021-10-01
宝武水务科技有限公司
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[0005] In view of the above problems, it is urgent to develop a low-cost multi-pollutant wastewater comprehensive treatment technology, and at the same time solve the problems of difficult resource utilization and high treatment costs of flue gas desulfurization wastewater and coking desulfurization waste liquid
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[0030] As mentioned in the background technology, heavy metal desulfurization wastewater with a high concentration is easily formed during the sintering flue gas desulfurization process. In this type of heavy metal desulfurization wastewater, the removal of thallium is the most important, and its toxicity is far higher than that of As, Hg, Cd, Pb, Cu, and has a certain degree of accumulation, the toxic effect can last for a long time, and the pollution of water bodies is extremely harmful to the health of the people. At the same time, the coking desulfurization waste liquid contains high concentrations of sulfide, rhodanide and highly toxic cyanide, so that the coking desulfurization waste liquid cannot be directly treated by biochemical methods, and must be detoxified before entering the biological system. At present, both coking desulfurization waste liquid and flue gas desulfurization waste water need to be equipped with a special sewage treatment system, and the constructio...
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The invention provides a comprehensive treatment method for coking desulfurization waste liquid and flue gas desulfurization waste water, the comprehensive treatment method comprises the following steps: aerating the flue gas desulfurization waste water, and simultaneously removing oil and impurities from the coking desulfurization waste liquid; preparing activated carbon, diatomite, caustic soda flakes and slaked lime into slurry according to a certain proportion; mixing the slurry with the aerated flue gas desulfurization wastewater, and fully reacting to form a first mixed solution; and adding the coking desulfurization waste liquid into the first mixed solution and fully reacting to form a second mixed solution. The coking desulfurization waste liquid and the flue gas desulfurization waste water are fully reacted after being pretreated, so that heavy metals in the flue gas desulfurization waste water as well as cyanides, thiocyanides and sulfides in the coking desulfurization waste liquid can be synchronously and effectively removed, and cooperative treatment of the coking desulfurization waste liquid and the flue gas desulfurization waste water is realized; the problem of high treatment cost of wastewater and waste liquid is solved, the problem of environmental pollution is also solved, and resource utilization of wastewater and waste liquid is realized.
Description
technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a comprehensive treatment method for coking desulfurization waste liquid and flue gas desulfurization waste water. Background technique [0002] In iron and steel metallurgical joint enterprises, sintering flue gas and coke oven gas are often used for desulfurization treatment. Sintering flue gas desulfurization generally adopts wet magnesia desulfurization. When iron ore is sintered at high temperature, various trace or trace heavy metal compounds (such as trace thallium, trace zinc, lead, copper, cadmium, mercury, etc.) associated with raw materials are gasified or sublimation, the wastewater entering the sintering flue gas desulfurization process is gradually enriched to form a heavy metal desulfurization wastewater with a high concentration. Pb, Cu, and have a certain degree of accumulation, the toxic effect can last for a long time, polluting the water body is...
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IPC IPC(8): C02F1/62C02F1/58C02F101/10C02F101/18C02F101/20C02F103/18
CPCC02F1/62C02F1/58C02F2103/18C02F2101/20C02F2101/18C02F2101/101
Inventor 朱忠文赵薇江承付谢美娟刘显清肖志伟李气远
Owner 宝武水务科技有限公司