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CN-224207778-U - Flexible flat membrane module

CN224207778UCN 224207778 UCN224207778 UCN 224207778UCN-224207778-U

Abstract

The utility model provides a flexible flat membrane module. Comprises a flexible flat membrane, a sealing partition plate, a sealing fixing plate, an end side sealing plate, an assembly water collecting joint, a fixing part, a frame, a water producing branch pipe, a water producing main pipe and an aeration tank. According to the flexible flat membrane structure, the arranged sealing spacing plates are close to the compression membrane, so that the flexible flat membrane has more stable support, the gap of the membrane is controlled by the thickness of the sealing spacing plates, meanwhile, the sealing spacing plates also play a role in producing water, and the problems of high material cost, low membrane filling ratio, complex membrane assembly device installation and the like of the traditional rigid flat membrane are solved.

Inventors

  • CHEN FUTAI
  • WEI LAI
  • HAO FUJIN
  • ZHENG HONGTAO

Assignees

  • 清大国华环境集团股份有限公司
  • 北京清大国华膜科技有限公司

Dates

Publication Date
20260508
Application Date
20241231

Claims (6)

  1. 1. The flexible flat membrane module is characterized by comprising a flexible flat membrane (1), a sealing partition plate (2), a sealing fixing plate (3), an end side sealing plate (4), a module water collecting joint (5) and a fixing part (6), a frame (7), a water producing branch pipe (8), a water producing main pipe (9) and an aeration tank (10); a flexible flat membrane (1) for purifying sewage to obtain produced water, comprising a double-layer separation membrane and a water producing grid with a single layer at the inner side; A sealing spacer (2) for providing support and fixing and water collecting functions for the flexible flat membrane; A sealing and fixing plate (3) for providing a supporting and fixing function for the flexible flat membrane; An end side sealing plate (4) for supporting the flexible flat membrane and fixing, compacting, sealing and protecting the sealing partition plate and the sealing fixing plate; the assembly water collecting joint (5) is a water collecting connecting port of the flexible flat membrane; The fixing component (6) consists of a threaded screw rod, a flat pad, an elastic pad and a nut and is used for fixing and compacting a plurality of flexible flat films; a frame (7) for supporting and fixing the flexible flat membrane; A water production branch pipe (8) for collecting water produced by the flexible flat membrane; a main water producing pipe (9) for collecting all the produced water collected in the branch water producing pipes; and the aeration box (10) is used for placing an aerator so as to delay the membrane pollution process of the flexible flat membrane.
  2. 2. The flexible flat membrane assembly of claim 1, wherein the flexible flat membrane (1) is tightly welded on the periphery of the separation membrane by the separation membrane (101) and the water producing grid (102) through ultrasonic welding or hot-melt welding technology, water producing holes are formed in the top or bottom of the flexible flat membrane (1), the number of the water producing holes is 1-2, through holes are formed in corners of the flexible flat membrane (1), and annular sealing welding lines are formed in the holes of the corners through ultrasonic welding or hot-melt welding.
  3. 3. The flexible flat membrane module according to claim 1, wherein the sealing spacing plate (2) is an ABS, PP or PVC material injection molding or machining strip-shaped flat plate, a water producing hole (202) is arranged at the center of the sealing spacing plate, an annular groove is arranged on the outer ring of the water producing hole (202), an annular sealing ring is placed in the groove, three fixing limiting holes I (201) are further arranged in the sealing spacing plate (2), one side of each fixing limiting hole I (201) is a convex circular hole, the other side of each fixing limiting hole I is a concave circular hole, and when the sealing spacing plate (2) is adjacently arranged, two side holes are in socket connection; The length of the sealing spacing plate (2) is 400-500mm, the width is 50-80mm, the thickness is 5-8mm, and the diameter of the water producing hole is 20-32mm.
  4. 4. The flexible flat membrane module according to claim 1, wherein the sealing fixing plate (3) is an elongated flat plate made of ABS, PP or PVC materials through injection molding or machining, and is provided with three fixing limiting holes II (301), one side of each fixing limiting hole II (301) is a convex round hole, the other side of each fixing limiting hole II is a concave round hole, and when the sealing fixing plates (3) are adjacently arranged, the two side holes are in socket connection; The length of the sealing fixing plate (3) is 400-500mm, the width of the sealing fixing plate is 30-50mm, the thickness of the sealing fixing plate is 5-8mm, and the thickness of the sealing fixing plate (3) is consistent with that of the sealing spacing plate (2).
  5. 5. The flexible flat membrane module according to claim 1, wherein end side sealing plates (4) are arranged on two sides of the flexible flat membrane stack, the whole membrane module is pressed and fixed through a fixing part, and the end side sealing plates (4) are provided with sealing plate water producing holes and fixing limiting holes which correspond to punching positions of the flat membrane membranes; The end side sealing plate (4) is 500-800mm in length, 300-500mm in width and 10-15mm in thickness, and is made of ABS, PP or PVC materials through injection molding or machining and is made of metal inserts or embedded parts.
  6. 6. The flexible flat membrane module according to claim 1, wherein the number of water producing holes of the flexible flat membrane (1) is 1-2; When the number of the water producing holes is 1, the upper part of the flexible flat membrane (1) is provided with a sealing spacing plate (2), the lower part of the flexible flat membrane (1) is provided with a sealing fixing plate (3), the sealing spacing plate (2), the sealing fixing plate (3) and the flexible flat membrane (1) are sequentially placed at intervals to form a flexible flat membrane stack, the bag structure of the flexible flat membrane (1) forms a water producing inner cavity in a negative pressure environment, the two sides of the water producing holes of the single flexible flat membrane (1) in the flexible flat membrane stack are provided with the sealing spacing plates (2), and a peripheral sealing ring blocks sewage and a water producing passage under the action of a pressing force, so that the sealing of a membrane is ensured; When the number of the water producing holes is 2, the upper part and the lower part of the flexible diaphragm are respectively provided with a sealing spacing plate (2), the sealing spacing plates (2) and the flexible flat plate films (1) are sequentially placed at intervals to form a flexible flat plate film stack, the bag type structure of the flexible flat plate films forms a water producing inner cavity in a negative pressure environment, the two sides of the water producing holes of the single flexible flat plate film (1) in the flexible flat plate film stack are respectively provided with the sealing spacing plates (2), and the peripheral sealing ring blocks sewage and a water producing passage under the action of a pressing force, so that the sealing of the diaphragm is ensured.

Description

Flexible flat membrane module Technical Field The utility model relates to the field of membrane separation, in particular to a flexible flat membrane module. Background The Membrane Bioreactor (MBR) is a novel sewage treatment process organically combining a microorganism treatment technology and a membrane separation technology, and compared with the traditional biological treatment process, the MBR process has higher treatment efficiency and better water quality stability. In the modern sewage treatment process, the automation and integration degree of the MBR process are higher and higher, and the MBR process can be suitable for various sewage treatment occasions. Commercial MBR membrane elements are mainly hollow fiber membranes and flat plate membranes, wherein the flat plate membranes have better pollution resistance, but have the disadvantage of low packing density. The existing flat membrane product mainly comprises a rigid flat membrane element, namely two layers of flat membrane, two layers of supporting lining cloth and a supporting flat plate, wherein the supporting plate is a solid ABS plate with water collecting grooves on the surfaces of two sides, the rigid flat membrane has the defects that (1) the thickness of the supporting plate is generally 5.5-6mm and the required thickness of the supporting plate is multiplied along with the increase of the area, (2) the supporting plate is a solid plate, the cost of the supporting plate is about 40-60% of that of the whole membrane element, and (3) the existing flat membrane assembly device is formed by integrating a stainless steel frame and the membrane, the installation gap is determined by a clamping plate, the clamping plate is provided with a clamping groove, the membrane is matched with the clamping groove, the parts of the whole flat membrane assembly device are more, the installation work is complicated, the installation efficiency is low, and the popularization and the application of the flat membrane assembly device are severely limited. In recent years, the appearance of flexible flat films is expected to solve the problems of high cost, low filling density and the like of the flat films. Compared with the traditional rigid flat membrane, the rigid plate support is omitted, the manufacturing cost is reduced, the thickness of the membrane element is thinner, the gap is easier to adjust, the membrane filling ratio in unit volume is improved, and meanwhile, the swinging characteristic of the flexible membrane under aeration is improved, so that the flexible flat membrane has more excellent membrane pollution tolerance characteristic. And the flexible flat membrane is easier to form a modularized assembly, and the structure of the stacked flexible flat membrane assembly is simpler and more convenient to install. Disclosure of utility model The utility model can solve the problems of high material cost, low film filling ratio, complex installation of a film group device and the like of the traditional rigid flat film, thereby providing a flexible flat film component and an assembly method. The patent of the utility model is realized as follows: a flexible flat membrane module is characterized by comprising a flexible flat membrane, a sealing partition plate, a sealing fixing plate, an end side sealing plate, a module water collecting joint, a fixing part, a frame, a water production branch pipe, a water production main pipe and an aeration tank. Further, the flexible flat membrane is used for purifying sewage to obtain produced water, the flexible flat membrane comprises a double-layer separation membrane and a single-layer produced water grid on the inner side, the separation membrane and the produced water grid are tightly welded on the periphery of the separation membrane through ultrasonic welding or hot-melt welding technology, the produced water holes are formed in the top or bottom of the flexible flat membrane, the number of the produced water holes is 1-2, through holes are also formed in corners of the flexible flat membrane, and the holes of the corners are welded in an ultrasonic mode or a hot-melt mode to form annular sealing welding lines, so that the flexible flat membrane is formed. The manufactured flat membrane element has the characteristics of light weight and uniform distribution of produced water pressure. Preferably, the separation membrane is a membrane made of PET lining cloth and coated with a functional layer on the surface, and the functional layer material can be one of polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) or polyvinyl chloride (PVC). Preferably, the water producing grid is a filtering material of 3D fabric, the width of the runner can be one of 26-34mil, and the standard hole number can be one of 9-16 mesh. The sealing partition plate is used for providing supporting, fixing and water collecting functions for the flexible flat plate film, the sealing partition plate is a strip-shaped fla