Membrane filtration device

Abstract

The membrane filtration device comprises a sealing tank, a water inlet, a first water production port, a concentrated water port, a water inlet pump, a water production pump and an immersed curtain type membrane assembly, wherein the water inlet, the first water production port and the concentrated water port are formed in the sealing tank; the water inlet pump is communicated with the water inlet; the immersed curtain type membrane assembly comprises a membrane tow, an upper membrane tube, a lower membrane tube, an upper mounting bracket, a lower mounting bracket, a second water production port formed in the upper membrane tube and / or the lower membrane tube, and a water collector communicated with the first water production port and the second water production port respectively; the upper mounting bracket and the lower mounting bracket are fixedly connected into the sealed tank, wherein at least one of the upper membrane tube and the lower membrane tube is a movable membrane tube, the movable membrane tube is movably connected with the corresponding mounting bracket, a limiting piece for preventing the movable membrane tube and the corresponding mounting bracket from completely separating is arranged on the movable membrane tube, and the limiting piece is positioned on one side, away from the membrane tow, of the corresponding mounting bracket. According to the membrane filtration device, the membrane flux is relatively high; sundries can be prevented from accumulating at the end of the film curtain, and the system operation stability is good.

Description

technical field [0001] The invention relates to a membrane filter device. Background technique [0002] Hollow fiber membranes generally adopt two structures: curtain membrane and column membrane. [0003] The curtain membrane is generally made into a submerged membrane box. The membrane box is placed in the membrane tank, and the water is filtered by relying on the suction force of the water pump to form a transmembrane pressure difference. Because the membrane filtration system of this structure is open, it is difficult to obtain high differential pressure power, and the membrane flux is generally not high; and it is difficult to achieve in-situ restorative chemical cleaning in the membrane pool. [0004] Column membranes are generally made of membrane columns cast at both ends, and installed side by side on the membrane frame; the filtration area of ​​a single membrane column used in large-scale water treatment devices is generally 50-75m 2 Between; Filtration pressure ...

AI Technical Summary

Problems solved by technology

The column membrane filtration system is a closed system. Its disadvantages are that the filtration area of ​​a single membrane column is small and the filling efficiency of membrane filaments is low; the closed structure cast at both ends makes it difficult to clean the hollow fiber membranes thoroughly Debris fouling at the root of terminal membrane filaments

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