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Technical method by using seawater to remove sulfur dioxide in smoke through membrane absorption method

A technology of sulfur dioxide and process methods, which is applied in the direction of chemical instruments and methods, separation methods, and separation of dispersed particles. It can solve the problems of large area occupied by packed towers, high operating costs, and inflexible installation, and achieves convenient operation and low space occupation. Small, flexible installation effect

Inactive Publication Date: 2007-12-26
DALIAN UNIV OF TECH
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Problems solved by technology

At present, seawater desulfurization technology using packed towers has been industrialized at home and abroad. However, due to the large area occupied by packed towers, high investment, high operating costs, and inflexible installation, some inherent shortcomings of tower absorbers are inevitable.

Method used

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  • Technical method by using seawater to remove sulfur dioxide in smoke through membrane absorption method

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Embodiment Construction

[0027] Embodiments of the process method of the present invention will be described in detail below in conjunction with the technical scheme and accompanying drawings.

[0028] As shown in Figure 2, the hydrophobic hollow fiber membrane absorber is composed of 64 hydrophobic polypropylene hollow fiber ultrafiltration membranes with an outer diameter of 600 μm and an inner diameter of about 500 μm filled in a glass tube with a diameter of 10 mm and an effective length of 220 mm. made by law. The micropore size on the surface of the membrane filament is 0.07-0.1 μm, and the wall thickness of the membrane filament is 50 μm.

[0029] The experimental gas consists of air and SO 2 Mixed to simulate flue gas, where the air is compressed by the air pump and dried by the drying tube, SO 2 Released from the steel cylinder, the two are mixed evenly by the mixer, and then enter the hollow fiber inner tube side of the membrane absorber; the absorption liquid enters the shell side of the ...

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Abstract

The invention relates to a technique method of sea removing the sulphur dioxide of gas in the film absorption method, which belongs to the air pollution control technology domain. Its characteristic lies in that the gas cools down through the dust removal and sea water cycle cooling system into the cavity of the hydrophobicity hollow-fibre membrane absorber. After the sea water filters thickly, enters the membrane absorber shell as desulphurization absorption liquid by the flow control part. This method controls the fluid two pressure differences, uses the pore on the sparse water film to cause the fluid and gas separately flow inside and outside the membrane without having the interaction mix, which avoides the shortcoming of traditional aqueous desulphurization method. This invention's effect and the profit are having high efficiency, flexible to install, small floor space, easy to adjust the size, and invariably current control. The membrane absorption method has the very good application prospect in the coast, the islands, and the ships and other place which has rich seawater resource.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and relates to a process method for separating sulfur dioxide in flue gas with a hydrophobic hollow fiber membrane absorber using seawater as a sulfur dioxide absorbing liquid. Background technique [0002] SO 2 It is a kind of acid gas device with long transmission distance and great harm among air pollutants. It mainly comes from the combustion of chemical tail gas and fossil fuels such as coal and petroleum. The wet desulfurization process is a flue gas desulfurization method with high desulfurization efficiency. The traditional SO 2 The wet removal process requires towers or columns to realize gas-liquid contact, which requires a large area of ​​equipment, high investment, high operating costs, and inflexible installation. In addition, due to the direct contact between the gas-liquid two-phase during the absorption process, the process is easily limited by the hydrodynamic con...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50B01D53/18
Inventor 杨凤林孙雪雁
Owner DALIAN UNIV OF TECH
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