Ammonia recovery system for high ammonia nitrogen wastewater treatment

Abstract

The invention discloses a high-ammonia-nitrogen wastewater treatment ammonia recycling system which comprises a wastewater inlet, a pipeline, absorbing towers, a coagulative precipitation tank, a sludge tank, a chamber type filter press and a mud cake discharge hole, wherein the wastewater inlet goes to a regulating reservoir; the regulating reservoir is connected with a high-efficiency composite denitrification tower through a pump; ammonia gas which is separated by the high-efficiency composite denitrification tower is fed into the absorbing tower through a pipeline at the upper part of the high-efficiency composite denitrification tower; the lower part of the high-efficiency composite denitrification tower is connected with the coagulative precipitation tank; the coagulative precipitation tank is divided into a reaction tank and a separation tank; a clean liquid separated from the upper layer of the separation tank is fed into a clean water tank; a turbid liquid separated from the lower layer of the separation tank is fed into the sludge tank through a lower outlet; the sludge tank is connected with the chamber type filter press; clean liquid subjected to filter pressing by the chamber type filter press is fed back to the regulating reservoir; the mud cakes obtained through filter pressing are discharged out for landfill from the mud cake discharge hole. The invention further discloses a high ammonia-nitrogen wastewater treatment ammonia recycling process. The high ammonia-nitrogen wastewater treatment ammonia recycling system disclosed by the invention is good in denitrification effect, efficient and environment-friendly, and also has the advantages that construction cost is of relatively reasonable, treatment cost is relatively low and the operation conditions are easily reached.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to an ammonia nitrogen wastewater treatment process, in particular to an ammonia recovery system for high ammonia nitrogen wastewater treatment. Background technique [0002] High-concentration ammonia-nitrogen wastewater is one of the more difficult types of industrial wastewater. It has a wide range of sources and a large amount of discharge. It is produced in metallurgy, chemical industry, fertilizer, petrochemical, coking, pharmaceutical, food and other production departments and landfills. In recent years, with the development of the economy, the resulting high-concentration ammonia nitrogen wastewater has also become one of the restrictive factors for the development of related industries. [0003] A large amount of high-concentration ammonia nitrogen wastewater is discharged into water bodies, especially lakes and bays with slow flow, which will easily cause al...

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Problems solved by technology

[0004] At present, a lot of research has been carried out on the treatment technology of ammonia nitrogen wastewater at home and abroad. In China, biological stabilization pond method, A / O method, catalytic wet oxidation method, air stripping method and stripping method are used to treat high concentration ammonia nitrogen wastewater. Or the reason why the denitrification efficiency of steam stripping method is low, there are three main reasons: one, because it has only pure physical action but no chemical action, thus it is impossible to convert all ionic ammonium into molecular ammonia, let alone convert Organic nitrogen is converted into ammonia nitrogen; second, it is impossible to destroy the strong binding force between ammonia molecules and water molecules, and break the hydrogen bond between combined ammonia molecules and water molecules; third, the traditional stripping or stripping method, Although the air-water ratio and energy consumption are surprisingly high, the contact reaction time of air and water cannot be controlled

Moreover, but often the construction cost is high, the treatment cost is high, the operating conditions are harsh, and the denitrification effect is not ideal

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