Multilayer backwashing filter and method

Abstract

The invention discloses a multilayer backwashing filter, and a method. The multilayer backwashing filter comprises a tank body; an upper water chamber, a middle water chamber and a lower water chamberare arranged in the tank body from top to bottom; filter material layers are respectively arranged between the upper water chamber and the middle water chamber, and between the middle water chamber and the lower water chamber; the lower water chamber is communicated with a bottom cavity; the bottom cavity is communicated with a water inlet pipe; the upper water chamber is communicated with a filtered water outlet pipe, the filtered water outlet pipe is communicated with a drainage pipe below, and the bottom end of the drainage pipe is communicated with a backwash water outlet pipe which is communicated with the bottom cavity; a rotating motor is arranged at the top of the tank body and is fixedly connected with a hollow rotating shaft, and the hollow rotating shaft is communicated with awater sprayer; the bottom end of the hollow rotating shaft is located in a positioning sleeve which is fixedly connected with an elbow, and the elbow is communicated with a backwash water inlet pipe.The method comprises a sewage filtering method, a method for backwashing using clear water, and a backwashing method using sewage. According to the multilayer backwashing filter, layered and spaced arrangement of filter materials is adopted, so that the filtering effect is good, and at the same time, backwashing function is achieved, and the cleaning effect is better.

Description

technical field [0001] The invention relates to a filter and a method, in particular to a multi-layer recoil filter and a method. Background technique [0002] The filter material or filter screen of the existing filter has single or difficult-to-clean defects in design, which seriously affects the filtration quality and operating efficiency, causing the filter material or filter screen to be easily blocked and needs to be replaced frequently, which not only increases labor maintenance costs, but also affects The service life of the filter is shortened, and the replacement operation of the filter material layer is very inconvenient. For example, in the traditional mechanical filter, in order to ensure its filtering effect, various filter materials are laminated and combined together. The thickness of the filter layer is large, and backwashing has almost no effect; another example is the popular shallow sand filter in recent years. The filter material is single, Its filtrati...

AI Technical Summary

Problems solved by technology

[0002] The filter material or filter screen of the existing filter has single or difficult-to-clean defects in design, which seriously affects the filtration quality and operating efficiency, causing the filter material or filter screen to be easily blocked and needs to be replaced frequently, which not only increases labor maintenance costs, but also affects The service life of the filter is shortened, and the replacement operation of the filter material layer is very inconvenient

For example, in the traditional mechanical filter, in order to ensure its filtering effect, various filter materials are laminated and combined together. The thickness of the filter layer is large, and backwashing has almost no effect; another example is the popular shallow sand filter in recent years. The filter material is single, Its filtration accuracy and effect are not ideal. At the same time, because the entire section can only be washed slowly, the washing quality is poor, resulting in poor use of the filter layer. Therefore, in order to reduce the frequent replacement of the filter layer, a larger cross-section is often selected, resulting in filtration. The size and footprint of the filter become larger, which is not conducive to the use of filters

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