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Method for controlling and treating alumina alkaline waste water from aluminum factory by using acidic smoker waste gas

A technology of acid waste gas and alumina, which is applied in the direction of chemical instruments and methods, separation methods, and the use of liquid separation agents, etc., can solve the problems of large water consumption, high cost, and hindrance to the use of small aluminum plants, and achieve high resource utilization. , reduce emissions, save money and energy

Active Publication Date: 2011-07-13
国家电投集团远大环保装备制造有限公司
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Problems solved by technology

However, the cost of the existing solutions for treating alumina alkaline wastewater is too high, that is, it needs to consume a lot of water resources and invest a lot of money, which hinders the use of many small aluminum plants

Method used

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  • Method for controlling and treating alumina alkaline waste water from aluminum factory by using acidic smoker waste gas
  • Method for controlling and treating alumina alkaline waste water from aluminum factory by using acidic smoker waste gas
  • Method for controlling and treating alumina alkaline waste water from aluminum factory by using acidic smoker waste gas

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Embodiment Construction

[0017] The equipment for treating alumina alkaline wastewater by using acidic oxides in flue gas includes an alumina alkaline wastewater collection box 11 , a spraying system 9 and a flue dust filtering device 18 .

[0018] The aluminum oxide alkaline waste water collection box 11 is made of stainless steel, with a volume of 15 cubic meters and a thickness of 5 millimeters.

[0019] The spray system 9 includes a filter screen 12, a booster pump 13, a solenoid valve 14, a nozzle 16 and a spray pipeline. The working process of the spray system 9 is as follows. After the booster pump 13 works, the alumina alkaline wastewater enters the booster pump 13 through the filter screen 12, and the booster pump 13 increases the pressure to about 1 MPa, and the spray pipeline passes through the solenoid valve 14, Finally, it is sprayed out by the nozzle 16.

[0020] The smoke and dust exhaust gas filtering device 18 includes a smoke and dust exhaust gas inlet 10, a smoke and dust exhaust g...

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Abstract

The invention relates to a method for controlling and treating alumina alkaline waste water from an aluminum factory by using acidic smoker waste gas. The method comprises the following steps: introducing the acidic smoker waste gas into a smoker waste gas filtration device, and spraying the alumina alkaline waste water by a spray system in the smoker waste gas filtration device so that acidic waste gas particles fully react with spray particles of alkaline waste water in the air, wherein the spray system comprises multiple nozzles which are used for repeatedly spraying descending smoker waste gas many times so as to gradually reduce the alkaline of the alumina alkaline waste water. Tests prove that the method has practicable application value, can effectively neutralize the alumina alkaline waste water, responds national laws and regulations related to environment protection, saves a large amount of funds and energy source, reduces the emission of waste water and waste gas and has the advantages of small investment and high resource utilization rate; in addition, sulfides and nitric oxides in the smoker waste gas are absorbed by the alumina alkaline waste water, thereby achieving the technical effects of smoke abatement, desulfuration and dust removal.

Description

technical field [0001] The invention relates to a method for alumina alkaline wastewater in an aluminum plant, in particular to a method for treating alumina alkaline wastewater by using soot acid waste gas. Background technique [0002] At present, the popularized and applied scheme to reduce alumina alkaline wastewater from aluminum plants is to carry out alumina alkaline industrial wastewater and domestic sewage treatment for the specific situation that alumina alkaline wastewater contains certain flocculation components and the requirements for alumina reuse water are not high. Two kinds of waste water with different properties interact with each other to purify sewage technical scheme. According to the pH value of alkaline wastewater, different mixing ratios are selected, and a sewage treatment method is developed. The treated water quality meets the requirements of alumina production and reuse. In this scheme, the flocculation components in alkaline industrial wastewa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66B01D53/78B01D53/48B01D53/56B01D47/06
Inventor 陈茂荣姜宜宽
Owner 国家电投集团远大环保装备制造有限公司
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