Metal film differential pressure filter

Abstract

The invention specifically relates to a metal film differential pressure filter and aims to provide a metal film differential pressure filter which has the advantages that a backwashing system and a blowdown system are combined, backwashing sewage is discharged in time, the backwashing time is reduced, and the filter efficiency is improved. The metal film differential pressure filter comprises a body, a filtering system, the backwashing system, a transmission system and the blowdown system, wherein the filtering system is positioned in the body, the backwashing system is positioned in the filtering system, the transmission system is connected with the backwashing system, and the blowdown system is positioned in the filtering system; the backwashing system comprises a hollow shaft which is concentric with the body, a high-pressure backwashing pump is arranged, so as to supply water to the body through a high-pressure backwashing pump inlet pipe, a high-pressure backwashing device with a high-pressure water injection nozzle is arranged outside a fine filter screen and is communicated with a high-pressure inlet cavity, and the high-pressure water injection nozzle is inclined towards the blowdown system; a blowdown device with a suction nozzle corresponding to the high-pressure water injection nozzle is arranged on the inner side of the fine filter screen, and an end opening, which is close to the blowdown system, of the suction nozzle is greater than that which is close to the high-pressure inlet cavity. The metal film differential pressure filter has the advantages of short backwashing time and low water consumption and can be quickly restored to be in an initial state.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, in particular to a metal membrane differential pressure filter. Background technique [0002] The metal membrane differential pressure filter is a comprehensive water treatment equipment. Its main function is to remove suspended solids and particulate matter in the water body, purify the water quality, and reduce the generation of system fouling, bacteria, algae, and rust. [0003] The existing metal membrane differential pressure filter includes a body, a filtering system, a backwashing system, a transmission system and a sewage system. The backwash water nozzle and its corresponding sewage suction nozzle set on the backwash system are the same in size and shape as the sewage suction nozzle. The sewage suction nozzle cannot suck in the backwash water and impurities that have penetrated the filter screen in a timely and complete manner. It requires the backwash system to backwash the filter...

AI Technical Summary

Problems solved by technology

The backwash water nozzle and the corresponding sewage suction nozzle set on the backwash system, the size and shape of the backwash water nozzle and the sewage suction nozzle are the same. During the backwash process, the water sprayed from the backwash water nozzle is jet-shaped The sewage suction nozzle cannot suck the backwash water and impurities through the filter in time and thoroughly. It needs the backwash system to backwash the filter for many times. Filtration Efficiency and Filtration Effect

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