Adjustable composite dynamic filtering device

Abstract

The invention discloses an adjustable composite dynamic filtering device. The device comprises a tank body, the middle part of the tank body is filled with a filter material layer, the upper part of the tank body is provided with a water inlet, the bottom of the tank body is provided with a water outlet, the filter material layer comprises a top fluidized bed layer and a lower fixed bed layer, andthe thickness and / or height of the fluidized bed layer is adjustable; a backwashing drain pipe is vertically mounted in the tank body, and a solid-liquid separator located in the tank body is mountedat the top of the backwashing drain pipe; a water inlet branch pipe is arranged at the water inlet, and the tail end of the water inlet branch pipe is connected to the middle part of the backwashingdrain pipe; and the water inlet corresponds to the fluidized bed layer, and is tangent to the tank body. According to the invention, large particles in inflow water can be adsorbed in the fluidized filter material layer, and fine particle pollutants in the inflow water can go deep into the lower filter bed, and in addition, the filter material with a large active catalyst medium specific surface area increases the dirt holding capacity of the filter material layer and prolongs the filtering period of the filter.

Description

technical field [0001] The invention relates to the field of filters, in particular to an adjustable composite dynamic filter device. Background technique [0002] Filtration is the most commonly used unit in the sewage treatment process. The most common filtration method is to let the sewage pass through the filter of the fixed bed filter material composed of quartz sand, anthracite and other granular materials. The filter layer is accumulated in the material bed layer, so the pores of the filter layer are gradually blocked by dirt, and a filter cake is formed on the surface of the filter layer, and the combined air-water backwash is used to regenerate the filter material. [0003] The suspended matter in the sewage contains a large amount of organic matter, which will lead to the enrichment and reproduction of microorganisms and anaerobic corruption in the filter layer for a long time, resulting in the adhesion and hardening of the filter material and the breakdown of the ...

AI Technical Summary

Problems solved by technology

[0003] The suspended matter in the sewage contains a large amount of organic matter, which will lead to the enrichment and reproduction of microorganisms and anaerobic corruption in the filter layer for a long time, resulting in the adhesion and compaction of the filter material and the breakdown of the filter bed, resulting in short flow of the filter and resulting in water discharge. quality deterioration

Although the air-water combined backwash regeneration is used, it is difficult to restore the filter material to its original state.

[0004] In addition, traditional filters have disadvantages such as low filtration accuracy and filtration speed, large depth of filter bed, large equipment footprint, high water volume for backwashing of filter materials and high energy consumption for equipment operation.

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