Multi-medium filter and filtering method thereof

Abstract

The invention belongs to the technical field of water filtering, and particularly relates to a multi-medium filter and a filtering method thereof. The multi-medium filter comprises a filtering shell,rotating discs and filtering plates; the rotating discs are rotatably connected to the interior of the filtering shell; the two rotating discs are distributed up and down; the upper surfaces of the two rotating discs are fixedly connected with filtering plates; filter boxes are uniformly arranged on the upper surfaces of the two filtering plates; An adjusting plate is arranged in each filter box;automatic adjustment of the space where the filtering medium is located is achieved; by adjusting the space width of the filtering medium, the overall thickness of the filtering medium is controlled,automatic switching of filtering standards is achieved, washing resistance can be effectively reduced in the reverse washing process, and the filtering efficiency is improved. the water washing efficiency and the water washing effect are improved, and the phenomenon that in the traditional water washing process, water washing pressure is large, and part of filtering media are lost is avoided.

Description

technical field [0001] The invention belongs to the technical field of water filtration, and specifically relates to a multi-media filter and a filtering method thereof. Background technique [0002] Multi-media filter is a process of using one or several filter media to pass water with high turbidity through granular or non-granular materials of a certain thickness under a certain pressure, thereby effectively removing suspended impurities and clarifying the water. Commonly used The filter materials include quartz sand, anthracite, manganese sand, etc., which are mainly used for water treatment to remove turbidity, softened water, pre-treatment of pure water, etc. The turbidity of the effluent can reach below 3 degrees. [0003] According to CN109316788A a kind of multi-media filter and its filtration method, by installing multiple multi-media filters on the multi-media filter at the same time, the integrated design is carried out, the total floor space of the equipment is ...

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Problems solved by technology

[0004] However, the multi-media filter mainly uses the filter medium to filter and intercept suspended solids, sediment, organic matter and other impurities in the water, because after the multi-media filter works for a period of time, the sediment and other impurities intercepted in the filter shell will accumulate more and more, thus affecting The passability of the source water is reduced, the pressure of the outlet water is reduced, and the filtration flow rate is reduced, which not only wastes precious energy, but also the quality of the outlet water is not up to standard. Therefore, the multi-media filter must be backwashed after a period of use. The existing In the technology, by reversely introducing purified water into the filter shell, the accumulated impurities inside the filter are washed out. However, during the backwashing process, since the multi-media filter contains multiple filter media, the washing resistance is relatively large and the efficiency is low. Low, and because some impurities penetrate into the inside of the filter medium, it is difficult to wash out the impurities in the filter medium quickly and fully during the reverse washing process. Out, resulting in the loss of filter media and other problems

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