Membrane element

Abstract

The invention discloses a membrane element which comprises at least one membrane unit and a sealing part, wherein each membrane unit comprises two sheets of which the front sides are opposite to each other; the sealing part is arranged on the back of the two sheets; the front sides of the two sheets corresponding to a first side of each membrane unit are sealed by the sealing part; the sealing part comprises two sealing pieces which are respectively in sealed connection with the back of the two sheets; the two sealing pieces comprise extension parts going beyond the first side of the membrane unit; the extension parts are connected in a sealed manner. Because the binding force of binding the back of the sheets and other parts is high, the sealing part is arranged on the back of the sheet, the overall strength of the membrane element is improved.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a membrane element. Background technique [0002] Membrane elements are the core components of water treatment devices. The raw water to be filtered enters the raw water flow channel from the inlet of the raw water flow channel, and then passes through the membrane unit of the membrane element to become pure water and enters the pure water flow channel. At the same time, waste water flows from the raw water flow channel side of the membrane The outlet of the channel flows out. [0003] In the prior art, two sheets in a membrane unit face to face. In order to seal the sheets facing opposite each other, it is usually necessary to use end caps. However, in some cases, using the end cover to seal the diaphragm unit may cause water channeling in the membrane element, that is, the mixture of the pure water flow channel and the raw water flow channel causes the membrane e...

AI Technical Summary

Problems solved by technology

However, in some occasions, using the end cover to seal the diaphragm unit may cause water channeling in the membrane element, that is, the mixture of the pure water flow channel and the raw water flow channel causes the membrane element to fail.

After many times of research by the inventor, it was found that because there is only van der Waals force on the front of the sheet, there is no other cohesive force, and its bonding force with the chemical adhesive is poor. When two sheets facing each other are sealed by their front , the membrane unit may tear after a certain period of time, which will cause the failure of the membrane element

Images