Ammonia-nitrogen wastewater treatment device and method for removing ammonia nitrogen in wastewater

Abstract

The invention provides an ammonia-nitrogen wastewater treatment device and a method for removing ammonia nitrogen in wastewater. The device comprises a containing cavity, a rotating device and at least two air injection pipes. Wastewater enters the rotating device in the containing cavity from a water inlet of the containing cavity, and small holes are formed in side faces of blades of the rotating device, so that the wastewater is sprayed out from the small holes under the action of differential pressure inside and outside the holes; the rotating device is rotated under the action of reactingforce, and in a rotating process, the wastewater sprayed from the small holes collides with the inner wall of the containing cavity; meanwhile, at least two air injection pipes which are arranged tangentially to the containing cavity are used for injecting air into the containing cavity, and then the air is rotated in the containing cavity, is in contact with the wastewater in the side wall of the containing cavity, carries out ammonia-nitrogen gas in the wastewater, and then is discharged from an air outlet channel of the containing cavity; and the wastewater is discharged from a lower wateroutlet. According to the device, ammonia nitrogen in the wastewater can be efficiently removed, and operation cost is low. The method is simple in implementation step and good in ammonia nitrogen removal effect.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a treatment device for waste water containing ammonia nitrogen and a method for removing ammonia nitrogen in waste water. Background technique [0002] With the development of modern industry, the waste water produced in the industrial process is gradually increasing. In particular, the amount of wastewater containing high-concentration pollutants is increasing year by year, from a wide range of sources, such as chemical fertilizers, smelting, pharmaceuticals, food, coking and other industries that generate a large amount of high-ammonia nitrogen wastewater. A large amount of high-ammonia-nitrogen wastewater causes serious eutrophication effects on soil and water, resulting in black and odorous water. [0003] Researchers and engineers at home and abroad have researched and promoted the ammonia nitrogen removal technology in wastewater, but there is currently no efficient an...

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Problems solved by technology

However, these methods are either inefficient in removing ammonia nitrogen or expensive in operation, thus limiting their application range.

[0005] Specifically, the biological denitrification method can only be applied to low-concentration ammonia-nitrogen wastewater, with a narrow scope of application and a long action time; the stripping method is the most common application, and can also adapt to high-concentration ammonia-nitrogen wastewater, but it consumes a large amount of gas and consumes High power, low denitrification efficiency, large floor area, and easy to cause secondary pollution; breakpoint chlorination method is prone to excessive chlorine in water; ion exchange method needs to be continuously regenerated during operation, resulting in high operating costs

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