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Electrolytic aluminium waste gas treatment integrated device

A technology for waste gas treatment and electrolysis of aluminum, which is applied in the field of air pollution control and can solve problems such as waste gas pollution from electrolysis aluminum

Active Publication Date: 2015-03-25
中国国际经济技术开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to control the pollution of electrolytic aluminum waste gas and overcome the problems in the above patents, provide an integrated device for electrolytic aluminum waste gas treatment, which can effectively treat complex waste gas containing dust, carbon dioxide, carbon monoxide and hydrogen fluoride

Method used

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  • Electrolytic aluminium waste gas treatment integrated device
  • Electrolytic aluminium waste gas treatment integrated device

Examples

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Embodiment 1

[0027] Such as figure 1 The shown integrated electrolytic aluminum waste gas treatment device of the present invention includes defluorination and dust removal area 1, alkalization absorption area 2, demister 3, drying area 4 and gas collection area 5 from the bottom of the device upwards.

[0028] The defluorination and dust removal area 1 is located at the bottom of the whole device; the defluorination and dust removal area 1 is provided with a defluorination and dust removal assembly, and the defluorination and dust removal assembly includes a defluorination and dust removal liquid located on the upper part of the defluorination and dust removal assembly Spray device 1-1, waste water collection conical tank 1-2 located at the lower part of the defluorination and dust removal assembly, waste water collection conical tank 1-2 is connected to the waste water treatment pool through the waste water discharge valve 1-3 and the pipeline, and the waste water treatment reaches the st...

Embodiment 2

[0043] Such as figure 2 The difference between the electrolytic aluminum waste gas treatment integrated device of the present invention and the embodiment 1 is that the structure of the integrated device is defluorination and dust removal area 1, demister 3, drying area 4, oxidation area from the bottom of the device upwards. Zone 6, alkalization absorption zone 2.

[0044] The oxidation zone 6 is provided with an oxidation component, and the oxidation component includes an electric heating tube and a copper oxide active bed located on the upper part of the electric heating tube, and copper oxide scraps and copper oxide powder are placed on the copper oxide active bed.

[0045] The exhaust gas first enters the defluorination and dust removal area 1, and the defluorination and dust removal liquid is sprayed 1-1 from the uniformly distributed defluorination and dust removal liquid spraying device, forming countless fine mist droplets. After fully mixing and contacting with the ...

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Abstract

An electrolytic aluminium waste gas treatment integrated device comprises a defluorinating and dusting area, an alkalization and absorption area, a defogger, a drying area, a gas collection area and an oxidation zone, wherein a defluorinating and dusting liquid sprinkling device, a wastewater collecting cone tank, a wastewater drain valve, a gas inlet pipe, a gas distribution pipe, a defluorinating and dusting liquid circulating pump and a defluorinating and dusting liquid addition metering system are arranged in the defluorinating and dusting area; an alkali liquor sprinkling device, an alkali liquor storage and discharge tank, a sediment discharging pipe, a sediment drain valve, a triphase separator, an alkali liquor return pipe and an alkali liquor circulating pump are arranged in the alkalization and absorption area; the defogger is a baffle defogger or a swirling plate defogger; a drying agent is arranged in the drying area; a gas collecting pipe, a gas discharge pump and a carbon monoxide gas storage tank are arranged in the gas collecting area; an electrothermal tube and a cupric oxide pulldown bed at the upper part of the electrothermal tube are arranged in the oxidation area.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to an integrated device for treating electrolytic aluminum waste gas. Background technique [0002] After years of development, the electrolytic aluminum industry has gradually become an important basic industry in China. The modern aluminum industry adopts the cryolite-alumina molten salt electrolysis method. The molten cryolite is the solvent, alumina is the solute, and the carbon body is the anode. As a cathode, after a strong direct current is applied, an electrochemical reaction is carried out on the two electrodes in the electrolytic cell at 950 ° C to 970 ° C. The anode products are mainly carbon dioxide and carbon monoxide gas, which contains a certain amount of harmful gases such as hydrogen fluoride and solids. dust. Carbon dioxide is a greenhouse gas, which is the main cause of global warming; the greenhouse effect of some fluorides is 6,500 to 10,000 times...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/68B01D53/62B01D47/06C01B31/18C01B32/40
CPCY02A50/20
Inventor 万玉山陈艳秋黄利王莉
Owner 中国国际经济技术开发有限公司
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