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First of all, through the implementation of ion-exchange membrane caustic soda to replace the clean production of graphite anode caustic soda, sulfuric acid production system washing and purifying to change the closed pickling purification, titanium dioxide production system 20% waste acid utilization, sulfuric acid sewage treatment and sludge dewatering, calcium carbide slurry dewatering and The recovery of supernatant, sulfuric acid sewage treatment sludge slag yard and other projects can reduce waste acid emissions by 17,500 tons, 132 tons of fluorine, 25,000 tons of suspended materials, and 2,944 tons of COD per year, saving 5.885 million tons of water each year. , Comprehensive use of calcium carbide slag 180,000 tons. A total of 180 million yuan was invested in these projects.
Invested RMB 56.44 million to conduct mercury pollution treatment on the zinc roasting flue gas of 4 Daoer-type furnaces that have been directly sent to the plant-based acidification plant without mercury removal and purification. After the project is implemented, it can reduce 6.79 tons of mercury.
The smoke recovery technology of sulfur dioxide from the middle-alkali method is adopted to treat the smoke pollution in thermal power plants, recover high concentrations of SO2 and remove dust from the flue gas. After the project is completed, the boiler flue gas will be treated 900,000 cubic meters annually, with an annual output of 40,000 tons. SO2 gas (refined), annual by-product 11,000 tons of para-salt cake (sodium sulphate 70%, sodium sulfite 30%). The total investment of the project is 108.24 million yuan.
Invested 73.49 million yuan, using sodium formate process, use of SO2 recovered from thermal power station flue gas, and CO production insurance powder released from synthetic ammonia copper washing, the project will annually produce 60,000 tons of insurance powder and 14,000 tons of sodium metabisulphite.
It is understood that this comprehensive governance has received strong support from the National Development and Reform Commission. The state has allocated 104 million yuan in the special funds for the central budget.
Hunan's 400 Million Yuan to Clean Wastewater in Qingshuitang Industrial Zone
(Reporter Li Xiaolin) The reporter learned from the administrative office of the Hunan Petrochemical Industry that in order to further improve the comprehensive treatment of environmental pollution in the Qingshuitang Industrial Zone of Zhuzhou, Hunan Province decided to invest 420 million yuan in the construction of Zhuzhou Chemical Corporation. Zhicheng Chemical Co., Ltd., Zhongcheng Chemical Co., Ltd. and Zhuzhi Torch Metal Co., Ltd. and other four companies' "three wastes" treatment projects.