Ammonia recovery system for wastewater with high content of ammonia and nitrogen

Abstract

The invention provides an ammonia recovery system for wastewater with high content of ammonia and nitrogen. The system comprises the following process steps the wastewater with high content of ammoniaand nitrogen is introduced into a stripping tower for stripping to generate high-concentration ammonia gas, the ammonia gas with moisture is introduced into a water washing tower, after water washingand impurity removal are conducted through the water washing tower, the moisture in the ammonia gas is removed through a mist eliminator, a pressure regulating tube and a filter in sequence, then theammonia gas is conveyed to an ammonia compressor for compression and pressurization, and finally the ammonia gas is condensed by a condenser to obtain liquid ammonia; liquid ammonia flows into an ammonia reflux tank serving as a transfer station and partially flows back into the water washing tower for secondary recycling, and other liquid ammonia is conveyed to an ammonia storage tank to obtainpure liquid ammonia. Through reasonable process improvement and parameter setting, the efficiency of recovering the high ammonia nitrogen wastewater is effectively improved, the purity of recovered liquid ammonia is high, the problems of secondary pollution and high energy consumption during ammonia recycling are solved, the ammonia recovery cost is reduced, and the environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to an ammonia recovery system for high ammonia nitrogen wastewater. Background technique [0002] Ammonia nitrogen wastewater mainly comes from chemical fertilizers, coking, petrochemicals, pharmaceuticals, food, landfills, etc. A large amount of ammonia nitrogen wastewater discharges into water bodies not only causes eutrophication of water bodies, causes water body black and smelly, but also increases the difficulty and cost of water supply treatment, and even affects People and organisms produce toxic effects, and the treatment processes for ammonia nitrogen wastewater include various treatment processes such as biological methods and physical and chemical methods. At present, with the rapid development and growth of chemical fertilizer, petrochemical and other industries, the resulting high ammonia nitrogen wastewater has also become one of the restrictiv...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above existing problems, the present invention proposes an ammonia recovery system for high ammonia nitrogen wastewater. Through reasonable process improvement and parameter setting, the efficiency of high ammonia nitrogen wastewater recovery is effectively improved, the recovered liquid ammonia has high purity, and it solves the problem of ammonia recovery and utilization. The problem of secondary pollution and high energy consumption in the process reduces the cost of ammonia recovery and reduces environmental pollution