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

A treatment method, high ammonia nitrogen technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, degassed water/sewage treatment, etc., can solve high construction and operation costs, easy adhesion and scaling of packing in the tower, Ammonia nitrogen removal effect becomes poor, so as to achieve the effect of reducing equipment cleaning times, good gas-liquid mass transfer performance, and avoiding adhesion and scaling

Inactive Publication Date: 2014-03-26
BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
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  • Application Information

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

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Embodiment

[0033] Please combine figure 1 and figure 2 , High ammonia nitrogen wastewater comes from the fecal sewage of the train feces collection system, the composition and concentration are: ammonia nitrogen 1800-2200mg / L, pH value 8-9.

[0034] Fecal sewage and lye are respectively pumped into the pipeline mixer for mixing, and the pH value of the wastewater is adjusted to 11; the mixed wastewater is sent to the wastewater heater to be heated to a temperature of 40°C; the heated wastewater is sent to the fluidized stripping tower The waste water inlet 2 on the upper part of the tower body 1 enters the fluidized stripping tower, and is evenly distributed in the tower through the waste water distributor 6; The gas distribution supporting plate 8 is evenly distributed in the tower, and the particle packing 7 is used as an absorption system in the fluidized stripping tower. Fluidized stripping tower treatment water volume is 5m 3 / h, the height of the tower is 6.4m, and the diameter...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/20C02F101/16
Inventor 李安峰徐文江宁艳英潘涛郭行
Owner BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
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