A membrane filtration water purification device

Abstract

The invention discloses a membrane filtration method water purification device, which comprises a filter pool, including a filtration area and a mud collection area; a filter membrane, which is arranged in the filter area; and a filter material layer, which is arranged in the filter area. There are multiple cleaning parts in the material layer; the backwashing device includes a flushing assembly for allowing the filter membrane to discharge water from the inside to the outside and a gas source assembly for delivering gas to the filter area; the cleaning parts Under the action of air flow and / or water flow, the filter membrane can be tumbling and impacted in disorder, and then the filter membrane can be cleaned; the present invention can achieve better cleaning effect on the filter membrane through the arrangement of cleaning parts, high cleaning efficiency, and reduced It reduces the consumption of water resources and energy, avoids water quality and environmental pollution, and reduces the damage rate of the filter membrane; the filter material layer makes the water purification effect better, prolongs the service life of the filter membrane, and reduces the filter membrane. backwash frequency.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a membrane filtration water purification device. Background technique [0002] In the past membrane filtration water treatment technology, pre-dosing and mixing are usually used to flocculate the flocculant and the colloidal impurities in the water into tiny particles, and then use the filter membrane to intercept and filter. After the filter works to a certain degree of blockage of the membrane, the It is necessary to implement surface cleaning and chemical cleaning of the filter membrane to restore the filtration function of the filter membrane. [0003] Most of the traditional membrane cleaning methods use air flushing or water flushing of the pollutants on the membrane surface, but no matter whether it is air flushing or water flushing on the surface of the filter membrane, the pollution adhering to the membrane surface cannot be removed due to the lack of friction on...

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Problems solved by technology

[0003] Most of the traditional membrane cleaning methods use air flushing or water flushing of the pollutants on the membrane surface, but no matter whether it is air flushing or water flushing on the surface of the filter membrane, the pollution adhering to the membrane surface cannot be removed due to the lack of friction on the surface of the filter membrane. If the cleaning effect is poor, there will always be some dirt adhering to the surface of the filter membrane, so that the water purification filter membrane cannot restore the normal filtering function, resulting in shortened filtration work cycle and reduced filtration efficiency. Over time, the filter membrane gradually Weaken or even block the micropores on the surface of the filter membrane and lose the filtering effect; and in order to restore the filter function of the membrane, the membrane module must be hung in a strong acid and alkali chemical pool for soaking and cleaning every time it is used. Therefore, it will affect the water quality ( Especially drinking water) and the ecological environment have caused serious pollution

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