Method for deep treatment on cyanogens, fluorine and ammonia nitrogen-containing waste water
A technology for advanced treatment of ammonia nitrogen wastewater, applied in the directions of water/sewage multi-stage treatment, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve direct discharge, no advanced treatment, no wastewater Effectively handle and utilize issues such as
Active Publication Date: 2013-12-25
BAOSHAN IRON & STEEL CO LTD +1
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Problems solved by technology
That is, at present, the wastewater containing cyanide, fluorine, and ammonia nitrogen in my country's iron and steel enterprises generally does not undergo advanced treatment, and most of them are diluted and discharged directly. Therefore, the wastewater containing cyanide, fluorine, and ammonia nitrogen cannot be effectively treated and utilized.
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Embodiment 1
[0070] see figure 1 , figure 1 It is a flow chart of advanced treatment process containing cyanide, fluorine and ammonia nitrogen.
[0071] Wastewater containing cyanide, fluorine, and ammonia nitrogen is preliminarily treated by precipitation and filtration, and enters the breakpoint chlorination pool (1). , the amount of chlorine added increases, and the amount of residual chlorine increases. However, due to the slow growth of the latter amount of residual chlorine, thus, within a period of time, the amount of chlorine added increases, but the amount of residual chlorine will decrease instead. And at a certain point after this period of time, with the increase of the amount of chlorine added, the amount of residual chlorine will rise again. A certain point after this period of time is the turning point. After this breaking point, free residual chlorine appears, and the disinfection effect of continuing to add chlorine is the best it is good.
[0072] Ammonia nitrogen is ...
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Abstract
The invention discloses a method for deep treatment on cyanogens, fluorine and ammonia nitrogen-containing waste water. The method comprises the following steps of feeding waste water into a break point chlorination tank, carrying out oxidation of ammonia nitrogen into nitrogen, orderly feeding the waste water into a double-filter material filter from a raw water tank, carrying out pre-treatment on the waste water, feeding the waste water into a reverse osmosis device from a cartridge filter, feeding product water obatined by the reverse osmosis device into a fresh water tank for recycle of the product water as industrial water, feeding thick water obtained by a membrane desalting device of the reverse osmosis device into a fluorine removal tank for fluorine removal treatment, orderly feeding product water obtained by the fluorine removal tank into a primary coagulation tank and an inclined-plate precipitator for fluoride removal, feeding product water obtained by the inclined-plate precipitator into a cyanide breaking tank for a cyanide removal reaction, orderly feeding product water into a secondary coagulation tank and a middle water tank, feeding the treated product water into a fully automatic filter, feeding the filtered product water into a drain tank, and carrying out discharge. The method for deep treatment on cyanogens, fluorine and ammonia nitrogen-containing waste water can realize deep treatment on cyanogens, fluorine and ammonia nitrogen-containing waste water produced by iron and steel enterprises, realize recycle of most treated waste water as industrial water, realize standardization of discharged waste water, and reduce environmental pollution.
Description
technical field [0001] The present invention relates to the field of waste water treatment in the metallurgical industry. Specifically, the present invention relates to a method for advanced treatment of waste water containing cyanide, fluorine, and ammonia nitrogen. Industrial water standards are reused, and the rest is discharged up to standard. Background technique [0002] In the field of metallurgy, the industrial wastewater of short-process metallurgical processes mainly includes gas washing water in ironworks, OG dedusting water in steelmaking plants, direct cooling water in continuous casting machines, slag washing water in rolling mills in heavy plate plants, and some other users. of drainage. Among them, pollutants such as cyanide, fluorine, and ammonia nitrogen mainly come from the gas washing water of ironworks. These three types of pollutants cannot be removed through conventional precipitation and filtration, and directly affect the utilization range of reuse...
Claims
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IPC IPC(8): C02F9/04C02F1/44
Inventor 曹小兵吉民胡利光王万俊
Owner BAOSHAN IRON & STEEL CO LTD