Rotary immersed type filtering device

Abstract

The invention provides a rotary immersed type filtering device and relates to a thin-film filtering device. The rotary immersed type filtering device generally comprises a water storage tank, a film-component filtering unit, a washing unit and a rotary device, wherein an air valve is arranged at the top part of the water storage tank, and a waste releasing valve is arranged at the bottom part of the water storage tank. The filter-component filtering unit is rotatably arranged in the water storage tank, is connected with a water discharging pipeline and is used for separating solid particles inliquid. The washing unit is arranged in the water storage tank and is used for washing the film-component filtering unit. The rotary device is arranged at the top part or the bottom of the film-component filtering unit and is used for driving the film-component filtering unit to rotate. The rotary immersed type filtering device provided by the invention has the advantages that since the rotary device is arranged at the film-component filtering unit and is used for driving the film-component filtering unit to rotate, at least partial particles adsorbed at the film-component filtering unit areseparated from the film-component filtering unit due to the action of centrifugal force, so that the washing effect is improved, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to a membrane filter device, in particular to a rotatable submerged filter device. Background technique [0002] In the process of solid-liquid separation, filtration technology is one of the most commonly used technologies. The principle of filtration is to form a certain pressure difference on both sides of the filter medium, and the insoluble suspended matter is intercepted by the filter medium to form a filter cake, while the solvent, soluble substances and some particles smaller than the gap of the filter medium can pass through the filter cake and the filter medium to form a clear filter. Filtrate, and then achieve the effect of solid-liquid separation. [0003] When using the membrane filtration method, the membrane needs to be flushed regularly to ensure the quality of the water. The commonly used flushing method is to flush the film with air. The driving force for filtration is through suction or hydrostatic head inste...

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Problems solved by technology

[0005] Most of the above methods require the shear force generated by the high-speed pumping action to pass through the surface of the film, and there is still a large degree of energy loss in the process

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