Filter device and filtering method

Abstract

The invention discloses a filter device and a filtering method, relates to the technical field of filtering separation, and is used for solving the problems that in the prior art, a filtering effect is poor and even a filter cannot work due to the fact that a filtering hole channel of a filter cake formed on a filter disc is blocked. The filter device comprises a hollow rotating main shaft, a hollow scraper shaft, and a hollow water jet cutter shaft; scrapers are arranged on the hollow scraper shaft, the scrapers and the porous material filtering disc are arranged at intervals, and each scraper is arranged in the radius direction of the porous material filtering disc; the hollow scraper shaft is used for removing a filter cake layer accumulated on the porous material filter disc when the porous material filter disc rotates horizontally; the hollow water jet cutter shaft is parallel to the hollow scraper shaft and the hollow rotating main shaft; and water jet cutters are arranged on the hollow water jet cutter shaft, the water jet cutters and the porous material filtering disc are arranged at intervals, and each scraper is arranged in the radius direction of the porous material filtering disc and used for removing filter cake particles in pore channels of the porous material filtering disc after a filter cake layer falls off from the porous material filtering disc.

Description

technical field [0001] The invention relates to the technical field of filtration and separation, and more specifically to a filtration device and a filtration method. Background technique [0002] The multi-layer disc filter is used in the field of solid-liquid filtration and separation. Its main structure is that there is a rotating main shaft in the closed casing. The main shaft is a hollow structure. There are multi-layered disc-shaped filter discs on the main shaft. rotate. The basic working principle is: the solid-liquid mixed liquid entering the filter enters the filter disc under pressure, the liquid filtered by the filter disc forms a filtrate, and the solid particles intercepted by the filter disc form a filter cake layer on the surface of the filter disc. The accumulation of time will gradually thicken the filter cake layer, which will block the surface of the filter disc and reduce the filtering capacity of the filter disc. Therefore, it needs to be scraped off ...

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a filter device, which is used to solve the problem in the prior art that the filter cake formed on the filter disc is blocked due to the filter channel, which leads to poor filtering effect or even causes the filter to fail to work.

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