Electroosmotic dehydration method and device for material containing water

Abstract

The invention relates to an electroosmotic dehydration method and device for a material containing water. Through the interactive plural configuration of a cathode frame and an anode, a larger electrode area can be configured by virtue of a smaller floor area, and two sides of a cathode are not provided with a filter cloth, thus the electrodes are convenient to arrange and move, and simultaneously the material containing water with poor mobility similar to that of a pasty material, such as sewage mud after dehydration by virtue of a belt-type pressure filter can adapt; the moving power for the movement of the electrodes is not transferred by a material between the electrodes because of a tilt rod connecting mechanism between the electrodes, but the moving power is transferred to the tilt rod from oil pressure or a motor, and the tilt rod transfers the moving power to the electrodes for moving, thus the move of the electrodes and accurate control of the distance between the electrodes can be realized; and the material containing water storage tank and the compression of the material containing water based on air pressure enable the uniform loading of the material containing water to be possible. High dry dehydration of the compact, efficient and stable material containing water is realized by the electroosmotic dehydration device provided by the invention.

Description

technical field [0001] The invention relates to an electroosmotic dehydration method and device for water-containing materials, such as dehydration devices for food residues, sludge and coal slime produced in the process of wastewater treatment, especially for high-dryness dehydration of sludge, which belongs to water treatment and Dehydration technology in the field of solid waste treatment. Background technique [0002] Food residues in the production process of bean curd residue, shochu, and soy sauce, solid waste discharged from biological fermentation, and sludge and coal slime generated in the biological treatment of organic wastewater are often processed by vacuum filtration, pressure filtration, and centrifugal separation. For dehydration, because the sludge and other water-containing materials contain a large amount of organic matter and organisms, it is difficult for mechanical dehydration to achieve the desired moisture content. However, high water content causes...

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Problems solved by technology

[0003] However, in terms of electroosmotic dehydration of water-containing materials, although the principle is clear, there are various problems in terms of equipment, and it is difficult to operate well. Therefore, it has not yet become a popular technology in reality.

If a cylindrical anode is used, its effective area is limited compared to the space it occupies, which can only be small, and it is difficult to improve the processing capacity of the device

In the case of the filter-press type electro-osmosis dehydration machine, the thickness of the water-containing material becomes thinner as the dehydration progresses during the dehydration process, which requires that the distance between the cathode and the anode also need to be reduced, which makes engineering practice very difficult

In addition, the fluidity of sludge and other water-containing substances dewatered by belt filter press and screw press filter press is very poor, and the loading of raw material water-containing substances is a difficult operation problem.

For these reasons, the electroosmotic dehydration device is very large, and it is difficult to improve its dehydration efficiency.

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