Flat-membrane element and support plate

Abstract

A flat membrane element and a support plate of the flat membrane element. The flat membrane element (10) is formed by joining the edge of a membrane (12) to the membrane surface (14a) of a support part (14). On the membrane surface (14a), a plurality of water collection grooves (22, 22...) are formed side by side. In addition, on the support plate (14), a junction path is formed by joining the transparent portion (18) to the hollow portion (16) of one side portion (14b). The cavity part (16) communicates with the membrane surface part (14a) through a communicating hole (24, 24...) provided at one end of each sump (22, 22...). On the upper side of the transparent part (18), a discharge port (20) for suction and injection is provided. Therefore, this flat membrane element can minimize the thickness of the support plate, and can perform uniform and efficient filtration treatment and chemical cleaning on the entire membrane without reducing the strength of the support plate.

Description

technical field [0001] The invention relates to a flat membrane element and a support plate, in particular to a flat membrane element and a support plate which are dipped in treated water such as drainage, and are subjected to solid-liquid separation by filtering the treated water. Background technique [0002] In the past, flat membrane elements that are immersed in water to be treated such as drainage, and that perform solid-liquid separation by filtering the water to be treated, as disclosed in Patent Documents 1 and 2, are formed by joining a support plate having a rectangular plate shape as a filterable element. The edge of the diaphragm of the filter material is formed. [0003] When filtering with this flat membrane element, suction is performed from the discharge port provided on the support plate. Using the suction force from this outlet, the water to be treated passes through the membrane, and then the concentrated filtered water is discharged out of the system. ...

AI Technical Summary

Problems solved by technology

Therefore, during suction filtration, the closer the membrane is to the hole, the more concentrated the suction force will be, and the more the pollution degree of the membrane surface will be increased. In addition, when the medicine is cleaned, the farther away from the hole, the easier it is to retain the medicine solution. , so there is a problem of greatly reducing the life of the flat membrane element

[0009] As a countermeasure, thickening the support plate was also studied to increase the strength, but due to the increase in the weight of the support plate body, when operating the flat membrane element, the work efficiency is reduced, and at the same time, a new defect of increasing the material cost of the support plate appears.

Images