Sewage filtering system

Abstract

The invention provides a sewage filtering system which comprises a filtering pipe. A front filter net and a rear filter net are arranged inside the filtering pipe in a tensioned manner, each of the front filter net and the rear filter net is made of soft iron wires which all can move transversely, a front annular plate and a rear annular plate which extend inward in the radial direction of the inner wall of the filtering pipe are arranged in the filtering pipe and stick close to the front filter net and the rear filter net respectively, a bar-shaped electromagnet is arranged on a central connecting line of the front filter net and the rear filter net, the front filter net and the rear filter net are symmetric according to the middle section of the electromagnet, a front piezometer and a rear piezometer are arranged on the front sides of the front filter net and the rear filter net respectively, and the front piezometer, the rear piezometer and the electromagnet are jointly coupled to a controller outside the filtering pipe. The sewage filtering system can actively adjust mesh size of the filter nets according to the size of impurity particles in the process of primary filtering of particle impurities in sewage, thereby taking both filtering speed and filtering effect into consideration.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a sewage filtering system. Background technique [0002] At present, in the field of sewage filtration, especially in the preliminary filtration system for removing sewage particulate impurities, filter screens are generally used for primary filtration; however, in some sewage pipes with unstable water quality, the mesh size of the filter screen is difficult to grasp. If the mesh is too fine, the filtration speed will be slow; if the mesh is too large, there may be no filtering effect at all; and in order to ensure the filtering effect, a finer mesh is generally used to adapt to the filtration of finer particles. ; In this way, the efficiency of this kind of system is very low when filtering coarser impurity particles. Contents of the invention [0003] In view of the above problems, the purpose of the present invention is to provide a sewage filtration system, which can ac...

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Problems solved by technology

[0002] At present, in the field of sewage filtration, especially in the preliminary filtration system for removing sewage particulate impurities, filter screens are generally used for primary filtration; however, in some sewage pipes with unstable water quality, the mesh size of the filter screen is difficult to grasp. If the mesh is too fine, the filtration speed will be slow; if the mesh is too large, there may be no filtering effect at all; and in order to ensure the filtering effect, a finer mesh is generally used to adapt to the filtration of finer particles. ; In this way, the efficiency of this kind of system is very low when filtering coarser impurity particles

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