Waste water comprehensive treatment and recycling system and method adopting tungsten smelting ion-exchange method

Abstract

The invention discloses a waste water comprehensive treatment and recycling system and method adopting a tungsten smelting ion-exchange method. The system mainly comprises a crystallization mother liquor collection tank, a deamination pot, a post-exchange liquor collection tank, a pH regulating tank, a post-exchange liquor plate-and-frame filter press, a post-filter-press post-exchange liquor storage tank, a D318 macroporous resin recycling column, a heavy-metal-removal comprehensive treatment tank, a heavy-metal-removal plate-and-frame filter press, a mixed collection tank, an ammonia nitrogen treatment tank, a pH fine adjustment tank and a clarification tank which are sequentially arranged in a communicated mode, the system further comprises a sodium-washing water and chlorine-washing water collection tank, and the sodium-washing water and chlorine-washing water collection tank is connected with the mixed collection tank. The recycling method comprises the steps of deamination treatment of crystallization mother liquor, recycling of tungsten in post-exchange liquor and crystallization mother liquor waste water, comprehensive heavy-metal-removal treatment of the post-exchange liquor and the crystallization mother liquor waste water, recycling and treatment of sodium washing water and chlorine washing water, ammonia nitrogen and COD deep treatment, pH fine adjustment and clarification. By means of the method, a good recycling or treatment effect is achieved for multiple types of constituents in the waste water, and the waste water comprehensive treatment and recycling system and method have the advantages of being short in flow, low in investment cost and the like.

Description

technical field [0001] The invention relates to a waste water comprehensive treatment and recovery system and method, in particular to a waste water comprehensive treatment and recovery system and method for ion exchange smelting tungsten. Background technique [0002] With the dwindling of tungsten resources, the need for environmental protection and clean production, the goals of improving metal recovery rate, meeting wastewater discharge standards, saving energy and reducing emissions, and reducing production costs have become the fundamentals for manufacturers to improve their core competitiveness. During the production of ammonium paratungstate by ion exchange method, a large amount of waste water will be produced, mainly including post-handover liquid, washing water, ammonia washing water, and crystallization mother liquor. The waste water mainly contains tungsten, alkali, chloride ion, ammonia nitrogen, COD, and a small amount of arsenic. , fluoride ions and other ele...

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Problems solved by technology

Due to the complex components in wastewater and the single effect of traditional wastewater treatment methods, it is impossible to simultaneously treat m

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