Method for comprehensively utilizing water in ammonium sulfate production

Abstract

The invention relates to a method for comprehensively utilizing water in ammonium sulfate production, which is implemented in a way that: fresh water in which the sulfur/phosphorus content is 0mg/L is defined as primary water; water discharged out of a vacuum pump, in which the sulfur/phosphorus content is 0-10mg/L, is used as secondary water; mechanical sealing water for a cooler pump, in which the sulfur/phosphorus content is 10-30mg/L, is used as tertiary water; circulating water and waste water in a waste water pool, in which the sulfur/phosphorus content is higher than 30mg/L, are used as quarternary water; the primary water is used for an equipment vacuum pump with high water consumption; a scale inhibitor is added to the water discharged out of the vacuum pump, thereby serving as sealing water for the pump; the sealing water discharged out of the pump is used as compensation water of the circulating water; and the circulating water and other waste water in ammonium sulfate production are used as compensation water of washing water for a filtering machine. The method implements zero discharge of waste water of the ammonium sulfate device, thereby avoiding pollution sources; the method saves the consumption of fresh water, effectively recycles the elementary substance nitrogen in waste water, and enhances the utilization ratio of ammonia nitrogen, thereby lowering the cost; and the method satisfies the requirements for circular economy. The invention is applicable to ammonium sulfate production enterprises.

Description

technical field [0001] The invention relates to the treatment of water and waste water, and also to the scale prevention of water, in particular to the comprehensive utilization method of different water qualities in the production process of ammonium sulfate. Background technique [0002] We all know that water resources are becoming more and more precious. However, the production of ammonium sulfate consumes a lot of water and produces a lot of waste water. The main pollutants in these wastewaters are sulfur, phosphorus and nitrogen substances. If ammonia nitrogen wastewater is discharged directly into the environment, it will inevitably pollute rivers and soil, cause a wide range of pollution to the environment, and cause waste of water resources. At present, in the Chinese patent database, the technical solutions for the production of ammonium sulfate include No. ZL00111255.4 "A Method and Device for Treating Industrial Wastewater Containing Ammonium Sulfate", No. ZL002...

AI Technical Summary

Problems solved by technology

However, the water consumption in the production of ammonium sulfate is large, and the waste water produced is large.

The main pollutants in these wastewaters are sulfur, phosphorus and nitrogen substances. If ammonia nitrogen wastewater is discharged directly into the environment, it will inevitably pollute rivers and soil, cause a wide range of pollution to the environment, and cause waste of water resources.

At present, in the Chinese patent database, the technical solutions for the production of ammonium sulfate include No. ZL00111255.4 "A Method and Device for Treating Industrial Wastewater Containing Ammonium Sulfate", No. ZL00215757.8 "Preparation of Potassium Sulfate from Industrial Wastewater Containing Ammonium Sulfate" and Ammonium Potassium Chloride Device", ZL00215759.4 "A Device for Treating Industrial Wastewater Containing Ammonium Sulfate", etc. These technologies all have certain effects, but some are difficult and have high investment costs, and some only Can reduce wastewater pollution, but cannot achieve zero discharge of ammonium sulfate production wastewater

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