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Efficient ammonia nitrogen blowoff and hexamethylenetetramine synthesis closed loop treatment system

An ammonia nitrogen stripping and urotropine technology, which is applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. pollution, etc.

Active Publication Date: 2016-01-13
ZHEJIANG NANHUA ANTICORROSION EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a closed-loop treatment system for high-efficiency ammonia nitrogen stripping and synthesis of urotropine, which mainly solves the problem in the prior art that the ammonia nitrogen content of treated wastewater is generally between 150-400mg / L, which is far below Emission standard, it is very easy to cause secondary pollution, and it must be treated in the next step before it can be discharged, which makes the treatment process very complicated and other technical problems

Method used

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  • Efficient ammonia nitrogen blowoff and hexamethylenetetramine synthesis closed loop treatment system

Examples

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Embodiment 1

[0029] Embodiment 1: A kind of high-efficiency ammonia nitrogen blow-off of this example and synthetic urotropine closed-loop treatment system, such as figure 1 , comprising a wastewater pH adjustment tank 1, the wastewater pH adjustment tank is connected to a blow-off tower 3 through a high-pressure blow-off pump 2, the upper part of the blow-off tower is provided with a demister 4, and a hydraulic cavitation device 5 is provided below the demister. The bottom of the cavitation device is provided with an air distribution device 6, the middle part of the blow-off tower is provided with a blow-off filler 7, the blow-off tower is connected with a blow-off blower 8, the bottom of the blow-off tower is provided with a honeycomb packing 9, and the top of the blow-off tower passes through a tube The road is connected with an absorption tower 10, the top of the absorption tower is provided with an atomization device 11, the bottom of the atomization device is provided with an absorpti...

Embodiment 2

[0035] Example 2: A closed-loop treatment system for high-efficiency ammonia nitrogen stripping and synthesis of urotropine in this example, the structure of which is as in Example 1.

[0036] Ammonia nitrogen wastewater from an electrolytic manganese slag filtrate, wastewater concentration and characteristics: NH 3 -N: 2000-4000mg / L; pH: 7-8. The processing steps are as follows:

[0037] a. Send the wastewater into the wastewater pH adjustment tank 1, aerate and add calcium hydroxide solution to adjust the pH to 11, and preheat to 25°C with steam;

[0038] b. The waste water after the pretreatment is pressurized by the high-pressure blow-off pump 2 to the hydraulic cavitation device 5, the inlet pressure is 0.5MPa, and the air is installed. After the blow-off 6, the waste water is evenly distributed on the blow-off packing 7. The proportion of polypropylene Pall ring is 1:7, and the gas-liquid ratio of stripping is 150:1. The blown-off tail gas enters the absorption towe...

Embodiment 3

[0041] Example 3: A closed-loop treatment system for high-efficiency ammonia nitrogen stripping and synthesis of urotropine in this example, the structure of which is as in Example 1.

[0042] Ammonia nitrogen wastewater is produced during the fermentation process of a biopharmaceutical, the concentration and characteristics of wastewater: NH 3 -N: 1500-3000mg / L; pH: 6-8. The processing steps are as follows:

[0043] a. Send the wastewater into the wastewater pH adjustment tank 1, aerate and add potassium hydroxide solution to adjust the pH to 10, and preheat to 20°C with steam;

[0044] b. The pre-treated wastewater is pressurized by the high-pressure blow-off pump 2 to the hydraulic cavitation device 5, and the inlet pressure is 0.55 MPa. The waste water is evenly distributed on the packing after the blow-off of the air distribution device 6, and the packing ceramsite and polypropylene ladder ring are blown off. The proportion is 1:8, and the gas-liquid ratio of strippin...

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Abstract

The present invention relates to a high concentration ammonia nitrogen wastewater treatment system, more particularly to an efficient ammonia nitrogen blowoff and hexamethylenetetramine synthesis closed loop treatment system. In the prior art, the ammonia nitrogen content in the treated wastewater is generally 150-400 mg / L, the emission standard can not be met so as to easily cause secondary pollution, and the next treatment must be performed so as to perform the emission, such that the treatment process is complex, and other technical problems exist. A purpose of the present invention is to mainly solve the technical problems in the prior art. According to the present invention, a wastewater pH value adjustment groove is arranged and is connected to a blowoff tower through a high pressure blowoff pump, the upper portion of the blowoff tower is provided with a demister, a hydrodynamic cavitation device is arranged below the demister, a gas distribution device is arranged below the hydrodynamic cavitation device, the middle portion of t he blowoff tower is provided with a blowoff filler, the blowoff tower is connected to a wind removing device, the lower portion of the blowoff tower is provided with a honeycomb filler, the top portion of the blowoff tower is connected to an absorption tower through a pipeline, the top portion of the absorption tower is provided with an atomization device, an absorption filler is arranged below the atomization device, and the atomization device is connected to a formaldehyde tank.

Description

technical field [0001] The invention relates to a high-concentration ammonia nitrogen wastewater treatment system, in particular to a high-efficiency ammonia nitrogen stripping and synthesis of urotropine closed-loop treatment system. Background technique [0002] With the development of economy and society, the degree of industrialization in our country is getting higher and higher, and the pace of industrialization construction is accelerating. Industrial production: chemical industry, metallurgy, pharmaceutical, chemical fertilizer, electronics, food, leather, landfill and some light industrial production processes are produced A large amount of high-concentration ammonia nitrogen wastewater. The content of ammonia nitrogen in high-concentration ammonia nitrogen wastewater is generally between 2000-4000mg / L, and the content of some ammonia nitrogen is even as high as 10000-50000mg / L. The discharge of a large amount of ammonia nitrogen wastewater into the water body will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04B01D53/78B01D53/58C02F103/36
Inventor 金可刚郑燕云沈泉飞吴晓鹏
Owner ZHEJIANG NANHUA ANTICORROSION EQUIP