Pretreatment system and treatment method aiming at needle coke waste water
A pretreatment and needle coke technology, which is applied in the field of needle coke wastewater pretreatment system, can solve the problems of inability to directly carry out biochemical treatment, low pollutant concentration, poor biodegradability, etc., and achieve resource treatment, optimal combination, The effect of reducing the concentration of pollutants
Pending Publication Date: 2018-12-18
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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Problems solved by technology
He Lianyu et al.'s paper "Research on the Treatment of Wastewater from Coal-based Needle Coke Production" and Wang Xiong et al. The concentration of various pollutants in the diluted wastewater is very low, so only the biochemical treatment process or subsequent oxidation process is used to treat the wastewater, and the needle coke wastewater pretreatment is not mentioned
Therefore, undiluted needle coke wastewater contains high concentrations of organic and inorganic pollutants, has extremely poor biochemical properties, and cannot be directly biochemically treated. At present, there is no treatment process for this type of wastewater, which has become the first choice for the expansion and development of needle coke enterprises. big problem
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Embodiment
[0040] The embodiment uses the light oil separation wastewater produced by needle coke production, and the treatment capacity is 1m 3 / h.
[0041] 1) Oil removal process, the residence time of wastewater in the oil removal device 1 is 8 hours, the temperature is 55°C, heavy oil and light oil are removed and separated;
[0042] 2) Sulfur removal process, drain water from the middle position of oil removal device 1 and enter sulphide removal device 2, and add polyferric sulfate solution with a mass concentration of 30% at the same time, the addition amount is 2% of the waste water quality, and the gas-liquid volume ratio is 50% : 1, the residence time is 1.5h, and the sulfide in the catalytic oxidation wastewater is converted into vitriol;
[0043] 3) Ammonia distillation process, after the sulfide removal, the effluent is removed by the filter 7 to remove the slag, and the mass concentration is 30% lye, and the addition amount is 1.2% of the waste water quality, mixed evenly i...
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The invention relates to a pretreatment system and a treatment method aiming at needle coke waste water. The system comprises a deoiling device, a sulfide removal device, a storage tank for water discharged after sulfide removal, a filter, an ammonia distillation inflow water adjusting water tank, an ammonia distillation device, a heat exchanger, an ammonia distillation outflow water adjusting water tank, a dephenolizing device, a tank for water discharged after dephenolizing, a resin adsorption device and a pretreatment water discharge tank. The problem of difficulty in treating complicated needle coke waste water formed by high-concentration pollutants is solved. The mature and stable treatment process and equipment are combined optimally, the concentration of the pollutants in the wastewater is effectively reduced through targeting removal, and meanwhile, valuable industrial raw materials are recycled, so that the resourceful treatment of the needle coke waste water is realized.
Description
technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a needle coke wastewater pretreatment system and a treatment method. Background technique [0002] Most domestic and foreign smelting industries require high-power and ultra-high-power graphite electrodes, especially with the rapid development of electric furnace steelmaking technology, the demand for high-power and ultra-high-power graphite electrodes continues to increase. Needle coke has high conductivity and high durability. Thermal shock and oxidation resistance, while low sulfur, low nitrogen, is an ideal electrode material for electric furnaces. In addition, as a new type of carbon material, needle coke has become a high-quality negative electrode material for lithium-ion batteries due to its excellent properties such as easy graphitization, high electrical conductivity, and low ash content. With the vigorous development of the country's energy-saving and env...
Claims
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IPC IPC(8): C02F9/10C02F101/16C02F101/18C02F101/34
CPCC02F9/00C02F1/001C02F1/04C02F1/74C02F1/725C02F1/66C02F1/40C02F1/38C02F1/20C02F1/26C02F2301/08C02F2303/16C02F2101/101C02F2001/422C02F2101/345C02F2101/16C02F2101/18
Inventor 张立涛王宇楠安路阳刘睿董竟微陈亮
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD