Drum-type hydraulic screen for sewage treatment

Abstract

A drum hydraulic screen for sewage treatment comprises a water inlet pipe, a drum and a water outlet pipe, the drum comprises a screen mesh and end plates arranged on the two sides of the screen mesh, the end plates arranged on the two sides of the screen mesh are fixed to the water inlet pipe and the water outlet pipe respectively, the screen mesh is rotationally installed on the fixed end plates, and the rotary installation positions of the screen mesh and the end plates are fixedly connected with the water inlet pipe and the water outlet pipe. A blocking cavity structure is formed by the driving ring, the boss, the screen and the sealing ring. The blocking cavity structure can block internal sewage from leaking from the annular rotating installation area, and meanwhile, the water blocking ring and the water inlet and outlet path structure are arranged on the driving ring, so that silting on the lower portion of the screen pressing strip can be effectively removed.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to a drum hydraulic screen. Background technique [0002] The conventional drum hydraulic screen is composed of a drum, a water inlet end, a drum, and a sewage outflow end. The most common drum is composed of a middle screen and end plates on both sides. It is rotatably connected to the inlet and outlet ends by means of bearings, sealing rings and other mechanisms. However, due to the conventional submerged arrangement, the drum is immersed in water all the year round. When the screen on the drum is blocked, the water level in the drum will be higher than the water level outside the drum. Under the action of the pressure difference and long-term soaking, The annular weld area and the central roller area are very prone to leakage, which greatly affects the filtering effect of the hydraulic screen. In addition, the outside of the screen needs to be fixed by clamps and beading. When using...

AI Technical Summary

Problems solved by technology

However, due to the conventional sunken drum arrangement, the drum is immersed in water all year round. When the screen on the drum is blocked, the water level inside the drum will be higher than the water level outside the drum. Under the action of pressure difference and long-term immersion, The annular weld area and the center roller area are very prone to leakage, which greatly affects the filtering effect of the hydraulic screen

In addition, the outside of the screen needs to fix the filter cloth with clamps and beading. When cleaning the filter cloth and screen with nozzles, it is difficult to remove the silt inside the bead.

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