Roller screen filter device for sludge belt filter

Abstract

The invention relates to the field of sludge treatment, and discloses a roller screen filter device for a sludge belt filter, which is used to filter out sludge in sewage, which includes a roller screen (1) for filtering and a plurality of devices The first high-pressure nozzle (3) for cleaning the outside of the roller screen (1) outside the roller screen (1), the roller screen (1) is provided with a sludge outlet (4), and the roller The sieve filtering device also includes a high-pressure water pipe (6) and a compressed air pipe (7), and the high-pressure water pipe (6) and the compressed air pipe (7) communicate with the first high-pressure nozzle (3) at the same time, and the roller screen (1) There are multiple second high-pressure nozzles (8) for cleaning the inside of the roller screen (1) inside. The trommel filter device for the sludge belt filter of the present invention, while ensuring the pressure of the high-pressure nozzle, reduces the amount of clean water as much as possible, avoids the phenomenon of flowing out of the sludge outlet due to excessive cleaning water, thereby improving the Filtration ability improves the concentration effect.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to the field of sludge belt filters. Background technique [0002] As a supporting equipment for sewage treatment, the sludge belt filter can press filter and dehydrate the sludge produced in various sections of sewage treatment, and press it into mud cakes to achieve the purpose of preventing secondary pollution. It is a good solid-liquid separation equipment . Among them, filtering and dehydrating through roller sieve is an important part of the work of sludge belt filter. [0003] Existing roller screen filtration devices such as figure 1 , figure 2 As shown, when the roller screen is working, the sewage to be filtered is transported from the sewage pipe to the inside of the roller screen, and the water in the sewage is continuously filtered to the sewage collection and drainage pool below through the rotation of the roller screen. When the drum screen is filtering, the scree...

AI Technical Summary

Problems solved by technology

However, the existing technology has the following deficiencies: (1) Insufficient cleaning of the screen often occurs, resulting in blockage of the screen, and the water sprayed from the nozzle will flow out from the sludge outlet of the roller screen with the sludge, resulting in poor concentration effect , resulting in the distributing process of the belt extrusion filter, because the sludge is too thin and cannot be distributed normally, which greatly reduces the working efficiency of the sludge belt filter; When feeding, the water level at the bottom is too high and overflows the roller screen, and the material cannot achieve the concentration effect

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