Treatment system for high-concentration ammonia-nitrogen wastewater

Abstract

The invention discloses a treatment system for high-concentration ammonia-nitrogen wastewater. The treatment system comprises a pretreatment system, a concentration-increasing and energy-saving device, a stripping tower, a condenser and an ammonia water storage tank which are connected sequentially. The treatment system has the advantages that the treatment system is simple to operate, equipment investment is low, ammonia-nitrogen removal efficiency is high, steam unit consumption in ammonia-nitrogen wastewater treatment is low, up-to-standard discharge can be achieved through one-step treatment, and finished ammonia water with high economic value can be recycled.

Description

technical field [0001] The invention belongs to the technical field of ammonia-nitrogen wastewater treatment, and in particular relates to a treatment system for high-concentration ammonia-nitrogen wastewater. Background technique [0002] With the rapid development of my country's economy, the problem of water pollution is becoming more and more serious, and the pollution of ammonia nitrogen wastewater is becoming more and more serious. At present, chemical industry, metallurgy, petrochemical, pharmaceutical, food and other industries all produce a large amount of high-concentration ammonia nitrogen wastewater. The discharge of a large amount of ammonia nitrogen wastewater has led to intensified eutrophication of the water body, resulting in black and odorous water bodies and a large number of fish deaths. The resulting major water crises occur from time to time, seriously affecting people's normal life, and even endangering people's health, which has a huge social impact....

AI Technical Summary

Problems solved by technology

[0005] However, there are many technical problems in the steam stripping method, which limit its wide application in industry: On the one hand, the traditional steam stripping ammonia removal technology, for the ammonia nitrogen wastewater with a concentration of 3000-8000mg / L, after one treatment, The concentration of ammonia nitrogen is usually reduced to 100-300mg / L, which cannot meet the requirements of national emission standards; Wastewater), the concentration of ammonia water after treatment is generally about 5%, which cannot meet the concentration requirements of finished ammonia water, and has no economic value

In addition, traditional steam stripping devices usually use plate towers or random packed towers, which have the problems of high tower body and easy fouling and blockage of tower equipment

These defects lead to large equipment investment and high operating costs when using the traditional steam stripping method, which makes enterprises unwilling or unable to bear the processing costs

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