Recovery processing method of ammonia-nitrogen wastewater generated from nitric acid/ammonium nitrate production process

Abstract

The invention discloses a recovery processing method of ammonia-nitrogen wastewater generated from the nitric acid / ammonium nitrate production process. Nitric acid and ammonium nitrate in wastewater are respectively recovered by a distillation technology and an ion exchange technology, and water with acid and ammonium nitrate removed returns to a production line. separated water can be used as industrial make-up water. Up-to-standard emission also can be realized. By the new two-step technology of distillation and ion exchange, ammonium nitrate acidic wastewater is processed from the source, and the present conventional process for terminal sewage treatment is optimized. The recovery processing method can be applied and popularized in the whole fertilizer enterprise. Meanwhile, a whole plant effluent segregation technology, an ammonia-removal partial nitrification technology and a combined NH4-N removal technology which are developed form a complete set of new process which can be suitable for of nitrogenous fertilizer enterprises at various scales and concentrations. Thus, it becomes possible to meet pollution control requirements of nitrogenous fertilizer enterprises on low cost, good effect and profit. The pollution control measure of source comes first and terminal treatment follows and corresponding pollution control technology are undoubtedly a comprehensive new breakthrough of a wastewater zero discharge technology.

Description

technical field [0001] The invention belongs to the field of recovery and treatment of industrial waste water, and relates to a method for resourceful recovery and treatment of ammonia nitrogen waste water produced in the production process of nitric acid / ammonium nitrate, in particular to a method for recovering waste water from waste water by adopting a combination process of rectification and ion exchange Nitric acid and ammonium nitrate, and make the treated water meet the national first-level discharge standard, and can also be used as a wastewater treatment method for industrial supplementary water. technical background [0002] The chemical fertilizer industry is the pillar industry of our country and plays an important role in the national economy. However, ammonia nitrogen wastewater is unavoidable in the process of fertilizer production. Among them, the wastewater generated in the traditional production process of nitric acid and ammonium nitrate mainly uses aerat...

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Problems solved by technology

[0004] Aiming at defects such as large investment, high energy consumption and secondary pollution in the above-mentioned technology, the purpose of this invention is to provide a kind of nitric acid and ammonium nitrate reclaiming nitric acid and ammonium nitrate from the waste water containing nitric acid and ammonium nitrate produced in the production process of nitric acid and ammonium nitrate, The method that the treated water can be directly returned to the production device as industrial supplementary water, and can also be discharged directly to the outside, has the advantages of good energy saving effect, small floor space, low investment cost, good treatment effect and wide application range

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