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Comprehensive utilization method for wastewater of ammonium phosphate production

A technology for producing wastewater and ammonium phosphate, applied in chemical instruments and methods, phosphates, phosphorus oxyacids, etc., can solve the problems of recycling ammonia nitrogen wastewater, failing to achieve recycling, etc., to achieve environmental protection and reduce process The effect of water intake

Active Publication Date: 2010-12-29
WENGFU (GRP) CO LTD
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Problems solved by technology

[0003] The applicant once applied for a patent No. 200910102979.2 "A Method for Treating Ammonia Nitrogen Wastewater from Phosphate Fertilizer Enterprises", but it introduced a treatment method that did not recycle the ammonia nitrogen wastewater. Minimize the impact on the environment as much as possible, and do not recycle

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  • Comprehensive utilization method for wastewater of ammonium phosphate production
  • Comprehensive utilization method for wastewater of ammonium phosphate production

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Embodiment

[0012] The Phosphate Fertilizer Plant of Wengfu Group Company implements the comprehensive recycling of ammonium phosphate production wastewater, and realizes the large-scale recycling of ammonium phosphate wastewater through the ammonium phosphate plant and phosphoric acid plant.

[0013] The monoammonium phosphate and diammonium phosphate plants are separated by waste water, and the process water intake point is cut off except for some domestic water in the plant area.

[0014] The condensed water produced by I effect evaporation is sent to the desalinated water workshop as make-up water for the boiler desalinated water; the ammonia nitrogen wastewater produced by the II effect evaporation is used for tail gas washing make-up water in the ammonium phosphate production process, transmission equipment sealing water, and partly used for phosphoric acid production filter cloth Rinse water. Through the water circulation between different product devices, the ammonium phosphate plant p...

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Abstract

The invention discloses a comprehensive utilization method for wastewater of ammonium phosphate production. By distributing the wastewater, the wastewater is blended in other production links for recycling according to different ammonia nitrogen contents so as to realize zero emission. Condensed water generated by I-effect evaporation is relatively clean, and is delivered to a desalted water workshop to serve as supply water for desalted water of a boiler; and secondary steam generated by the I-effect evaporation is used in II-effect evaporation, condensed water is wastewater containing ammonia nitrogen, by adopting a treatment method of breaking up the whole into parts, a part of the wastewater is delivered to a tail gas washing system of a ammonium phosphate device and is added to serve as tail gas washing water, another part of wastewater is delivered to a circulating system of the ammonium phosphate device to serve as transmission equipment sealing water or adding water, and the other part of wastewater is delivered to a filter of the ammonium phosphate device to serve as filter cloth washing water. The method has the advantages of realizing zero emission of ammonia nitrogen wastewater of a large ammonium phosphate device, contributing to environmental protection, reducing process water quantity, realizing liquid-phase circular production, meeting the requirement of circular economy, and being suitable for the large ammonium phosphate device.

Description

【Technical Field】 [0001] The present invention is related to the utilization of wastewater, specifically, to the recovery and comprehensive utilization of ammonia nitrogen wastewater in the ammonium phosphate production process. 【Background technique】 [0002] A large amount of wastewater in the production of ammonium phosphate is mainly ammonia nitrogen wastewater. The amount of ammonia nitrogen wastewater generated in the production of ammonium phosphate is large. If it is discharged without treatment, it will inevitably pollute the environment; however, the treatment technology is difficult and costly. For a long time, the treatment of ammonia nitrogen wastewater generated during the production of ammonium phosphate has become a bottleneck for the development of ammonium phosphate production enterprises. [0003] The applicant once applied for the patent No. 200910102979.2 "A Method for Treating Ammonia Nitrogen Wastewater from Phosphate Fertilizer Enterprises", but it introduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C01B25/28
Inventor 黄进邱祖军金先煜饶轶晟张瑞张晓迁陈清宪胡曾毅
Owner WENGFU (GRP) CO LTD
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