Treatment process for high-concentration ammonium-nitrogen waste water

An ammonia nitrogen wastewater treatment technology, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of easy scaling and blockage of tower equipment, high operating costs, and high tower body. To solve the problem of fouling of tower equipment, improve the efficiency of mass transfer and heat transfer, and reduce the volume of tower equipment

Active Publication Date: 2015-09-23
CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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Problems solved by technology

[0005] However, there are many technical problems in the steam stripping method, which limit its wide application in industry: On the one hand, the traditional steam stripping ammonia removal technology, for the ammonia nitrogen wastewater with a concentration of 3000-8000mg/L, after one treatment, The concentration of ammonia nitrogen is usually reduced to 100-300mg/L, which cannot meet the requirements of national emission standards; Wastewater), the concentration of ammonia water after treatment is g

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  • Treatment process for high-concentration ammonium-nitrogen waste water
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  • Treatment process for high-concentration ammonium-nitrogen waste water

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[0036] Example 1

[0037] A treatment process for high-concentration ammonia-nitrogen wastewater of the present invention, wherein, in the high-concentration ammonia-nitrogen wastewater to be treated, the ammonia nitrogen concentration is 5000 mg / L, and Cl - The concentration is 330mg / L, HCO 3 - The concentration is 4250mg / L, the wastewater temperature is 22℃, the pH value is 7.9, and the treatment capacity is 10m 3 / h. The treatment process includes the following steps:

[0038] (1) Pre-treat the high-concentration ammonia nitrogen wastewater to be treated. The specific process is: first homogenize the high-concentration ammonia nitrogen wastewater, and then use sodium hydroxide (calcium hydroxide, sodium carbonate or sodium bicarbonate, etc.) Alkaline regulator) adjust the pH value to 11, and then perform precipitation and filtration to obtain the pretreated ammonia nitrogen wastewater.

[0039] (2) The pretreated ammonia-nitrogen wastewater is heated to 61°C by heat exchange tre...

Example Embodiment

[0059] Example 2

[0060] A treatment process for high-concentration ammonia-nitrogen wastewater of the present invention can adopt the treatment system of embodiment 1, wherein, in the high-concentration ammonia-nitrogen wastewater to be treated, the ammonia nitrogen concentration is 10000 mg / L, Cl - Concentration 120mg / L, SO 4 2- Concentration 8400 mg / L, temperature 26℃, pH value 6.2, processing capacity 10m 3 / h. The treatment process includes the following steps:

[0061] (1) Pre-treat the high-concentration ammonia-nitrogen wastewater to be treated. The specific process is: first homogenize the high-concentration ammonia-nitrogen wastewater, then adjust the pH value to 11.2 with sodium hydroxide, and then perform precipitation and filtration to obtain pretreatment After the ammonia nitrogen wastewater.

[0062] (2) The pretreated ammonia nitrogen wastewater is heated to 64℃ by heat exchange treatment first, and then the concentration is increased and the temperature is increas...

Example Embodiment

[0068] Example 3

[0069] A treatment process for high-concentration ammonia-nitrogen wastewater of the present invention can adopt the treatment system of embodiment 1, wherein, in the high-concentration ammonia-nitrogen wastewater to be treated, the concentration of ammonia nitrogen is 13500 mg / L, SO 4 2- The concentration is 4200 mg / L, the wastewater temperature is 28°C, the pH value is 6.7, and the treatment capacity is 10m 3 / h. The treatment process includes the following steps:

[0070] (1) Pre-treat the high-concentration ammonia-nitrogen wastewater to be treated. The specific process is: first homogenize the high-concentration ammonia-nitrogen wastewater, then adjust the pH value to 11 with sodium hydroxide, and then carry out precipitation and filtration to obtain pretreatment After the ammonia nitrogen wastewater.

[0071] (2) The pretreated ammonia-nitrogen wastewater is heated to 66°C by heat exchange treatment first, and then subjected to enrichment and heating treatm...

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Abstract

The invention discloses a treatment process for high-concentration ammonium-nitrogen waste water. The treatment process includes the following steps: (1), pre-treating the high-concentration ammonium-nitrogen waste water; (2), performing heat exchange treatment and densification heating treatment on the ammonium-nitrogen waste water after being pre-treated sequentially; (3), adopting stripping steam to perform steam stripping treatment on the ammonium-nitrogen waste water after densification heating to obtain ammonium-containing steam and deammoniated waste water; (4), subjecting part of the ammonium-containing steam to densification heating treatment of step (2), performing densification heating on the ammonium-nitrogen waste water after heat exchange treatment, condensing the other part of the ammonium-containing steam, enabling part of condensed liquid to flow back into steam stripping treatment of step (3), and taking the other part of the condensed liquid as a finished ammonia water product for storage. The treatment process is simple in step, small in equipment investment, high in ammonium-nitrogen removing efficiency and low in steam single consumption of ammonium-nitrogen waste water treatment, standard reaching emission can be realized through only one-time treatment by the treatment process, and the finished ammonia water product having economic value can be recycled.

Description

technical field [0001] The invention belongs to the technical field of ammonia-nitrogen wastewater treatment, and in particular relates to a treatment process for high-concentration ammonia-nitrogen wastewater. Background technique [0002] With the rapid development of my country's economy, the problem of water pollution is becoming more and more serious, and the pollution of ammonia nitrogen wastewater is becoming more and more serious. At present, chemical industry, metallurgy, petrochemical, pharmaceutical, food and other industries all produce a large amount of high-concentration ammonia nitrogen wastewater. The discharge of a large amount of ammonia nitrogen wastewater has led to intensified eutrophication of the water body, resulting in black and odorous water bodies and a large number of fish deaths. The resulting major water crises occur from time to time, seriously affecting people's normal life, and even endangering people's health, which has a huge social impact...

Claims

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Application Information

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IPC IPC(8): C02F9/10
Inventor 谭自强何劲松梁学武李鹏周才南陈辉任恒
Owner CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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