Flat sheet membrane assembly with frame net type supporting plate arranged in middle
By adopting a centrally located frame mesh support plate structure, the problem of high material cost of support plates for vertical rigid flat membrane modules is solved, achieving a significant reduction in cost while maintaining strength.
Patent Information
- Application Number
- CN202520498984.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-11
AI Technical Summary
The support plate material of existing vertical rigid flat membrane modules is expensive, accounting for about 40% of the cost of the membrane module, and it is difficult to reduce the cost.
It adopts a central frame mesh support plate structure, including a frame, a central horizontal plate, a central vertical plate, and a mesh panel, replacing the traditional 5 mm to 10 mm thick ABS plastic plate. The support plate has a hollow design in the middle to provide sufficient strength.
It significantly reduces manufacturing costs and saves more than 50% on material costs, while maintaining the same performance as vertical rigid flat sheet membrane modules.
Smart Images
Figure CN223887774U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a flat sheet membrane module, belonging to the technical field of environmentally friendly wastewater treatment equipment, and in particular to a flat sheet membrane module with a centrally located frame mesh support plate used in membrane bioreactors. Background Technology
[0002] Membrane bioreactors (MBR) technology is widely used in wastewater treatment. MBRs are a novel wastewater treatment system that organically combines membrane separation technology with biological treatment technology. They replace the secondary sedimentation tank at the end of traditional biological treatment processes with membrane modules. Flat-plate membrane modules are one of the most important membrane modules in MBRs, and they consist of flat-plate membrane modules, membrane frames, and aeration pipes. Flat-plate membrane modules come in many physical forms, but the most mainstream type is the vertically mounted rigid flat-plate membrane module.
[0003] Vertical rigid flat sheet membrane assembly, such as Figure 5 As shown: It consists of a vertically placed support plate, guide plates, and membranes. The support plate, also called a guide plate, is 5 to 10 millimeters thick and has crisscrossing grooves on both sides for water flow. The guide plates are generally made of non-woven fabric with a thickness of 1 to 2 millimeters and are used to provide space for water flow within the two membranes. There are two guide plates, one on each side of the support plate. There are also two membranes, one on each side of the guide plates, which are welded or bonded to the support plate around their perimeter. At least one outlet is provided on the top or side edge of the support plate. The outlet communicates with the cavity formed in the middle of the two membranes. During operation, water that passes through the membranes and enters the membrane module flows out through the outlet.
[0004] At runtime, such as Figure 6 As shown: The membrane frame is set inside the wastewater tank. The membrane frame consists of an upper horizontal pipe, a lower horizontal pipe, and a vertical pipe. The upper and lower horizontal pipes are fixedly connected by the vertical pipe. The aeration pipe is set below the lower horizontal pipe and connected to the aeration blower through a pipe. The vertically mounted rigid flat membrane module is installed vertically between the upper and lower horizontal pipes of the membrane frame. The outlet of the membrane module is connected to the water collection pipe through a hose. One end of the product water pipe is connected to the inlet of the product water pump, and the other end is connected to the water collection pipe. One end of the clear water pipe is connected to the outlet of the product water pump, and the other end is connected to the clear water tank. During water production, the aeration blower is first started, and air bubbles flow out through the through-holes of the aeration pipe. As they rise, they contact the membrane surface, carrying away contaminants. Then, the permeate pump is started, and the negative pressure of the pump separates the contaminants from the water at the membrane. The contaminants are trapped on the outside of the membrane, while the water enters the inside and flows from the outlet into the collection pipe, permeate pump, and clear water pipe, finally entering the clear water tank. The existing flat-sheet membrane modules still have the following shortcomings:
[0005] The vertical rigid flat membrane module requires a 5-10 mm thick flat plate as the middle support plate, which is usually made of ABS plastic sheet. The material cost of the support plate accounts for about 40% of the cost of the membrane module. In order to maintain the support strength of the vertical rigid flat membrane module, this cost is difficult to reduce. Summary of the Invention
[0006] To address the shortcomings of existing technologies, this invention provides a flat membrane module with a centrally located frame mesh support plate, which reduces manufacturing costs compared to vertically mounted rigid flat membrane modules.
[0007] The technical solution of this utility model to solve the above problems is: a flat membrane module with a centrally located frame mesh support plate, the structure of which includes a frame mesh support plate, a flow guide plate, and a membrane sheet; the frame mesh support plate includes a frame mesh support plate and a grid mesh support plate, the frame mesh support plate being composed of a frame and a mesh sheet, the frame including an upper horizontal frame, a lower horizontal frame, a left vertical frame, and a right vertical frame, the two ends of the upper horizontal frame being connected to the upper parts of the left and right vertical frames respectively, and the two ends of the lower horizontal frame being connected to the upper parts of the left and right vertical frames respectively. The lower part of the right vertical frame is connected, and the mesh is set in the middle of the frame, connecting to the upper horizontal frame, lower horizontal frame, left vertical frame, and right vertical frame on all four sides; the grid-type support plate includes a frame, mesh, middle horizontal plate, and middle vertical plate. The middle horizontal plate is set inside the frame, and its two ends are connected to the left vertical frame and the right vertical frame respectively. The distance between the middle horizontal plate and the upper and lower horizontal frames is 100 mm to 450 mm, and the distance between two middle horizontal plates is 100 mm to 450 mm. The middle vertical plate is set inside the frame, and its two ends are connected to the left vertical frame and the right vertical frame respectively. Do not connect with the upper and lower horizontal frames. The distance between the middle vertical plate and the left and right vertical frames is 100 mm to 450 mm. The distance between two middle vertical plates is 100 mm to 450 mm. The middle horizontal plates and middle vertical plates are fixedly connected. The mesh is set between the middle horizontal plates and middle vertical plates, and between the middle horizontal plates, middle vertical plates, and the frame. The four sides of the mesh are connected to the middle horizontal plates, middle vertical plates, and the frame. There are two guide vanes, one on each side of the frame mesh support plate. There are two diaphragms. Each membrane is set on the outside of the guide plate, and the edges of the membrane are connected to the frame. At least one outlet is set on the upper, left or right side of the frame mesh support plate. The outlet is connected to the cavity formed in the middle of the two membranes. The frame is 3 mm to 10 mm thick and 15 mm to 50 mm wide. The middle horizontal plate is 3 mm to 10 mm thick and 15 mm to 30 mm wide. The middle vertical plate is 3 mm to 10 mm thick and 15 mm to 30 mm wide. The mesh is 0.1 mm to 2 mm thick.
[0008] Its beneficial effects are:
[0009] The flat membrane assembly with a centrally located frame mesh support plate of this utility model significantly reduces manufacturing costs compared to the vertical rigid flat membrane assembly due to the use of a centrally hollow support plate. The frame, central horizontal plate, central vertical plate, and mesh provide sufficient strength for the membrane assembly, enabling it to achieve the same performance as the vertical rigid flat membrane assembly during operation. Attached Figure Description
[0010] The flat membrane assembly of the centrally located frame mesh support plate of this utility model will be further described with reference to the accompanying drawings and embodiments.
[0011] Figure 1 This is a schematic diagram of a flat membrane module with a centrally located frame mesh support plate according to this utility model. In the diagram, the membrane and guide plate on the front side have been removed from the lower part of the membrane module.
[0012] Figure 2 This is a schematic diagram of the frame mesh support plate of the flat film assembly of the present invention.
[0013] Figure 3 This is a schematic diagram of the grid-type support plate of the flat film assembly of the centrally located frame mesh support plate of this utility model.
[0014] Figure 4 This is a schematic diagram showing the operating state of the flat membrane assembly of the centrally located frame mesh support plate of this utility model, which is set on the membrane frame.
[0015] Figure 5 This is a schematic diagram of the front of a vertically mounted rigid flat sheet membrane module in the prior art, with the membrane sheet at the bottom of the front removed.
[0016] Figure 6 This is a schematic diagram of the operating status of a conventional flat-sheet membrane module.
[0017] In the diagram, 1 is the frame, 2 is the guide plate, 3 is the support plate, 4 is the membrane, 5 is the upper horizontal pipe, 6 is the lower horizontal pipe, 7 is the vertical pipe, 8 is the aeration pipe, 9 is the middle horizontal plate, 10 is the middle vertical plate, 11 is the mesh, 12 is the membrane frame, 13 is the permeate pump, 14 is the outlet, 15 is the aeration blower, 16 is the wastewater tank, 17 is the clear water tank, 18 is the permeate pipe, 19 is the water collection pipe, 20 is the clear water pipe, 21 is the flexible hose, 22 is the vertical rigid flat sheet membrane module, 23 is the flat sheet membrane module with a centrally located mesh support plate, 24 is the upper horizontal frame, 25 is the lower horizontal frame, 26 is the left vertical frame, and 27 is the right vertical frame. Detailed Implementation
[0018] A flat membrane module with a centrally located frame mesh support plate, such as Figure 1 , Figure 2 , Figure 3As shown: Its structure includes a frame-mesh support plate, guide vanes, and a membrane. The frame-mesh support plate includes a frame-within-a-mesh support plate and a grid-within-a-mesh support plate. The frame-within-a-mesh support plate consists of a frame and a mesh. The frame includes an upper horizontal frame, a lower horizontal frame, a left vertical frame, and a right vertical frame. The two ends of the upper horizontal frame are connected to the upper parts of the left and right vertical frames, respectively. The two ends of the lower horizontal frame are connected to the lower parts of the left and right vertical frames, respectively. The mesh is located in the middle of the frame and is connected to the upper horizontal frame, lower horizontal frame, left vertical frame, and right vertical frame around its perimeter. The grid-within-a-mesh support plate includes a frame, a mesh, a middle horizontal plate, and a middle vertical plate. The middle horizontal plate is located inside the frame and is connected to the left and right vertical frames, respectively. The distance between the middle horizontal plate and the upper and lower horizontal frames is 100 mm to 450 mm. The distance between two middle horizontal plates is also 100 mm to 450 mm. The middle vertical plate is located inside the frame and is connected to the upper and lower horizontal frames, respectively. The spacing between the left and right vertical frames is 100 mm to 450 mm, and the spacing between the two middle vertical plates is 100 mm to 450 mm. The middle horizontal plate and the middle vertical plate are fixedly connected. The mesh is set between the middle horizontal plate and the middle vertical plate, and between the middle horizontal plate, the middle vertical plate and the frame. The four sides of the mesh are connected to the middle horizontal plate, the middle vertical plate and the frame. There are two guide plates, which are respectively set on both sides of the frame mesh support plate. There are two membranes, which are respectively set on the outside of the guide plates. The four sides of the membranes are connected to the frame. At least one water outlet is set on the upper part, left side or right side of the frame mesh support plate. The water outlet is connected to the cavity formed in the middle of the two membranes. The frame is 3 mm to 10 mm thick and 15 mm to 50 mm wide. The middle horizontal plate is 3 mm to 10 mm thick and 15 mm to 30 mm wide. The middle vertical plate is 3 mm to 10 mm thick and 15 mm to 30 mm wide. The mesh is 0.1 mm to 2 mm thick.
[0019] The principle and operation process of the flat membrane module with centrally located frame mesh support plate of this utility model are described in detail below with reference to the accompanying drawings:
[0020] The membrane frame is installed inside the wastewater tank, and the aeration pipe is placed below the lower horizontal pipe, connected to the aeration blower via a pipeline. Figure 1 , Figure 4As shown: The flat membrane module of this utility model with a centrally located frame mesh support plate is installed side-by-side vertically in the slot between the upper and lower horizontal pipes within the membrane frame. The outlet of the membrane module is connected to the collection pipe via a flexible hose. The permeate pump is located at the top of the wastewater tank. One end of the permeate pipe is connected to the inlet of the permeate pump, and the other end is connected to the collection pipe. One end of the clear water pipe is connected to the outlet of the permeate pump, and the other end is connected to the clear water tank. During permeate operation, the aeration blower is first started, and air bubbles flow out through the through holes of the aeration pipe. As they rise, they come into contact with the membrane surface and carry away the pollutants on the membrane surface. Then, the permeate pump is started. Through the negative pressure suction of the permeate pump, the pollutants in the wastewater are separated from the water at the membrane. The pollutants are trapped on the outside of the membrane, and the water enters the inside of the membrane, enters the flexible hose through the outlet, and then flows into the collection pipe, permeate pipe, permeate pump, and clear water pipe, finally entering the clear water tank.
[0021] Membrane modules are generally operated intermittently, that is, the permeate pump is started to draw water under negative pressure for 8 minutes, the permeate pump is stopped for 2 minutes, and the aeration blower is run continuously.
[0022] The flat membrane module with a centrally located frame mesh support plate of this utility model saves more than 50% of the material compared with the support plate of the vertical rigid flat membrane module due to the use of a centrally hollowed-out frame mesh support plate, which significantly reduces the manufacturing cost compared with the vertical rigid flat membrane module. The horizontal plate, vertical plate and mesh in the frame provide sufficient strength for the membrane module, and it can achieve the same performance as the vertical rigid flat membrane module during operation.
[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A flat sheet membrane module with a centrally located frame mesh support plate, which is an improvement on the flat sheet membrane module, mainly composed of a support plate, flow guide plates, and membrane sheets, characterized in that: Its structure includes a frame-mesh support plate, guide vanes, and a membrane. The frame-mesh support plate includes a frame-within-mesh support plate and a grid-within-mesh support plate. The frame-within-mesh support plate consists of a frame and a mesh. The frame includes an upper horizontal frame, a lower horizontal frame, a left vertical frame, and a right vertical frame. The two ends of the upper horizontal frame are connected to the upper parts of the left and right vertical frames, respectively. The two ends of the lower horizontal frame are connected to the lower parts of the left and right vertical frames, respectively. The mesh is located in the middle of the frame and is connected to the upper horizontal frame, lower horizontal frame, left vertical frame, and right vertical frame on all four sides. The grid-within-mesh support plate includes a frame, a mesh, a middle horizontal plate, and a middle vertical plate. The middle horizontal plate is located inside the frame and is connected to the left and right vertical frames, respectively. The distance between the middle horizontal plate and the upper and lower horizontal frames is 100 mm to 450 mm. The distance between two middle horizontal plates is also 100 mm to 450 mm. The middle vertical plate is located inside the frame and is connected to the upper and lower horizontal frames, respectively. The distance between the middle vertical plate and the left and right vertical frames is 100 mm to 450 mm. The spacing between the vertical frame and the right vertical frame is 100 mm to 450 mm, the spacing between the two middle vertical plates is 100 mm to 450 mm, the middle horizontal plate and the middle vertical plate are fixedly connected, the mesh is set between the middle horizontal plate and the middle vertical plate and between the middle horizontal plate, the middle vertical plate and the frame, and the four sides of the mesh are connected to the middle horizontal plate, the middle vertical plate and the frame; there are two guide plates, which are respectively set on both sides of the frame mesh support plate, and two membranes, which are respectively set on the outside of the guide plates, and the four sides of the membranes are connected to the frame. At least one water outlet is set on the upper part, left side or right side of the frame mesh support plate, and the water outlet is connected to the cavity formed in the middle of the two membranes. The frame is 3 mm to 10 mm thick and 15 mm to 50 mm wide, the middle horizontal plate is 3 mm to 10 mm thick and 15 mm to 30 mm wide, the middle vertical plate is 3 mm to 10 mm thick and 15 mm to 30 mm wide, and the mesh is 0.1 mm to 2 mm thick.