Treatment method and device for fluidizing and stripping high ammonia and nitrogen waste water

Abstract

A treatment method for fluidizing and stripping high ammonia and nitrogen waste water, comprising the following processes of: respectively sending high ammonia and nitrogen waste water and alkali lye into a pipe mixer for mixing, regulating a pH value to be 9-13, and heating until 20-50 DEG C; introducing the heated waste water into a fluidizing and stripping tower to be contacted with air and particle fillers in a fluidization state for mass transfer, discharging the stripped waste water from a waste water outlet on the bottom of the fluidizing and stripping tower, and discharging air containing ammonia in free form from an exhaust gas outlet on the top of the fluidizing and stripping tower. The invention further discloses a device for implementing the method.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment method for fluidized blow-off of high ammonia nitrogen wastewater. [0002] The invention also relates to a device for implementing the above-mentioned processing method. Background technique [0003] High ammonia nitrogen wastewater mainly comes from chemical industry, metallurgy, animal and human excretion, and is one of the main causes of water pollution at present. The treatment methods for high ammonia nitrogen wastewater mainly include: biological treatment method, steam stripping method, ammonia distillation method, air stripping method, etc. [0004] Biological treatment method, such as CN102503042, is named as a high-efficiency treatment method for high-ammonia nitrogen wastewater. The method adopts the treatment method of aeration+contact oxidation+special ammonia-loving microorganisms to remove ammonia nitrogen, and its removal rat...

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Problems solved by technology

[0004] Biological treatment method, such as CN102503042, is named as a high-efficiency treatment method for high-ammonia nitrogen wastewater. The method adopts the treatment method of aeration+contact oxidation+special ammonia-loving microorganisms to remove ammonia nitrogen, and its removal rate reaches more than 98%, but there are technical Complexity, long hydraulic retention time (120h) and other issues

[0005] Although the ammonia nitrogen removal rate of the steam stripping method and the ammonia distillation method is lower than that of the biological treatment method, they can recover ammonia nitrogen resources in a relatively short period of time and are also used in industry. However, there are problems such as large energy consumption and high operating costs.

[0006] The air stripping method is currently widely used. This method has the advantages of simple process, easy operation, and stable treatment effect. However, the removal rate of ammonia nitrogen is low (generally 60% to 70%), and the packing in the tower is easy to stick and scale, resulting in the removal effect of ammonia nitrogen. Variation and other issues

The improved air blow-off method, such as CN101935080 A, is called a high-concentration ammonia-nitrogen blow-off treatment system. This system improves the removal effect of ammonia nitrogen by changing the upper and lower distribution of gas and liquid (the effluent ammonia nitrogen can meet the national "Sewage Comprehensive Discharge Standard" (GB8978- 1996) Class I standard), but the internal components of the device are complicated, and the construction and operation costs are high

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