Anti-blocking pulse backflushing device of ceramic membrane filtration device

Abstract

This utility model relates to the field of backwashing technology for filtration devices, and more particularly to an anti-clogging pulse backwashing device for ceramic membrane filtration devices. The device comprises: a fixed housing and a pulse gas generator, with an impeller rotatably mounted inside the fixed housing; and a backwashing assembly including an inlet pipe fixedly connected to the outlet of the pulse gas generator. This utility model utilizes the high-pressure airflow generated by the pulse gas generator to impact the impeller, causing it to rotate. The rotating assembly then drives the connecting pipe and the jet nozzle to rotate, enabling the high-pressure pulse gas to be evenly and dynamically sprayed onto different areas of the ceramic membrane surface. This effectively expands the washing coverage area, avoids the dead zones present in traditional fixed washing, and thus more comprehensively removes stubborn blockages from the ceramic membrane surface and pores, significantly improving the backwashing effect and the filtration flux recovery rate of the ceramic membrane.

Description

Technical Field

[0001] This utility model relates to the field of backwashing technology for filtration devices, and in particular to an anti-clogging pulse backwashing device for ceramic membrane filtration devices. Background Technology

[0002] During the actual operation of a ceramic membrane filtration device, suspended particles and colloidal substances in the liquid to be filtered will gradually adhere to the surface of the ceramic membrane and the inside of the membrane pores. As the filtration time increases, these pollutants accumulate continuously, which can easily cause membrane pore blockage, resulting in a decrease in filtration flux and filtration efficiency. In severe cases, it may even be necessary to stop the machine for manual cleaning or replacement of the membrane module, which greatly affects the continuity of production and economic efficiency.

[0003] Traditional anti-clogging pulse backwashing systems often use high-pressure gas generated by a pulse gas generator to backwash stubborn blockages on the ceramic membrane surface. However, existing high-pressure gas washing areas are fixed, resulting in some stubborn blockages on the ceramic membrane surface remaining unwashed, failing to achieve comprehensive washing of stubborn blockages and creating washing dead zones. Therefore, this invention proposes an anti-clogging pulse backwashing device for ceramic membrane filtration to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the background art by proposing an anti-clogging pulse backwashing device for ceramic membrane filtration devices.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The anti-clogging pulse backwashing device for ceramic membrane filtration includes:

[0007] A fixed housing and a pulsed gas generator, wherein an impeller is rotatably mounted inside the fixed housing;

[0008] The backwash assembly includes an air inlet pipe fixedly connected to the outlet of a pulse gas generator, and the other end of the air inlet pipe fixedly connected to an off-center location at the bottom of a fixed housing. An air outlet pipe is fixedly installed on the top of the fixed housing and positioned directly above the air inlet pipe. The other end of the air outlet pipe is movably connected to a connecting pipe, and the other end of the connecting pipe is fixedly connected to a jet nozzle. Multiple jet heads are fixedly connected to the other side of the jet nozzle.

[0009] A rotating component is used to drive the connecting pipe to rotate.

[0010] Preferably, the rotating assembly includes a first bevel gear fixedly mounted on the surface of the air outlet pipe, a second bevel gear meshing with the outer side of the first bevel gear, a first transmission gear coaxially fixed with the other side of the second bevel gear, and the second bevel gear rotatably mounted on the surface of the fixed housing, the lower side of the first transmission gear meshing with the second transmission gear, and the second transmission gear rotatably mounted on the surface of the fixed housing and coaxially fixed with the impeller.

[0011] Preferably, a support ring is fixedly fitted on the surface of the air outlet pipe, and the support ring is movably embedded inside the connecting pipe.

[0012] Preferably, a rubber sealing ring is fixedly installed inside the connecting pipe, and the rubber sealing ring abuts against the end of the air outlet pipe away from the fixed shell.

[0013] Preferably, the diameter of the first bevel gear is greater than the diameter of the second bevel gear, and the diameter of the first transmission gear is greater than the diameter of the second transmission gear.

[0014] Preferably, the support ring is made of PTFE composite material.

[0015] Compared with existing technologies, the advantages of the anti-clogging pulse backwashing device for ceramic membrane filtration provided by this utility model are as follows:

[0016] 1. High-pressure gas generated by the pulse gas generator enters the bottom of the fixed housing off-center through the air inlet pipe. The airflow impacts the impeller, causing it to rotate. The impeller drives the connecting pipe and the jet tube to rotate through the rotating component. Multiple jet heads rotate synchronously with the jet tube, uniformly and dynamically spraying high-pressure pulse gas onto different areas of the ceramic membrane surface. This effectively expands the flushing coverage area, avoids the dead zone problem of traditional fixed flushing, and can more comprehensively remove stubborn blockages on the surface of the ceramic membrane and inside the membrane pores, significantly improving the backwashing effect and the filtration flux recovery rate of the ceramic membrane.

[0017] 2. By designing the gear transmission ratio between the first bevel gear, the second bevel gear, the first transmission gear, and the second transmission gear, the impeller can achieve a high rotational speed due to airflow impact. Through multi-stage gear reduction, the rotational speed of the connecting pipe can be kept within a suitable range. This ensures sufficient rinsing time for each area of ​​the ceramic film surface by the jet head, while avoiding airflow diffusion that affects the rinsing pressure due to excessive rotational speed. This significantly improves the uniformity and thoroughness of backwashing. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the anti-clogging pulse backwashing device of the ceramic membrane filtration device proposed in this utility model;

[0019] Figure 2This is a schematic diagram of the anti-clogging pulse backwashing device of the ceramic membrane filtration device proposed in this utility model;

[0020] Figure 3 This is a cross-sectional view of the connection between the air outlet pipe and the connecting rod in the anti-clogging pulse backwashing device of the ceramic membrane filtration device proposed in this utility model.

[0021] In the diagram: 1. Fixed housing, 2. Pulse gas generator, 3. Inlet pipe, 4. Impeller, 5. Outlet pipe, 6. Connecting pipe, 7. Jet tube, 8. Jet head, 9. First bevel gear, 10. Second bevel gear, 11. First transmission gear, 12. Second transmission gear, 13. Support ring, 14. Rubber sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1 to 3 The anti-clogging pulse backwashing device for ceramic membrane filtration includes:

[0024] The system comprises a fixed housing 1 and a pulse gas generator 2. An impeller 4 is rotatably mounted inside the fixed housing 1. A backwashing assembly includes an inlet pipe 3 fixedly connected to the outlet end of the pulse gas generator 2, with the other end of the inlet pipe 3 fixedly connected to an off-center location at the bottom of the fixed housing 1. An outlet pipe 5 is fixedly mounted on the top of the fixed housing 1, positioned directly above the inlet pipe 3. A connecting pipe 6 is movably connected to the other end of the outlet pipe 5. A support ring 13 is fixedly fitted onto the surface of the outlet pipe 5, and is movably embedded inside the connecting pipe 6. The support ring 13 is made of PTFE composite material, which has excellent wear resistance and a low coefficient of friction, effectively reducing friction between the connecting pipe 6 and the outlet pipe 5 during rotation. Friction loss is reduced, extending the service life of the device. Meanwhile, the strong chemical stability of PTFE material allows it to adapt to different media environments during pulse gas transmission, avoiding sealing failure due to corrosion. A rubber sealing ring 14 is fixedly installed inside the connecting pipe 6, and the rubber sealing ring 14 abuts against the end of the outlet pipe 5 away from the fixed shell 1. Through the elastic deformation of the rubber sealing ring 14, it can tightly fit the connection gap between the outlet pipe 5 and the connecting pipe 6, significantly improving the airtightness of the connection and preventing leakage of pulse gas during transmission, ensuring stable gas pressure required for backwashing.

[0025] The other end of the connecting pipe 6 is fixedly connected to the jet tube 7, and the other side of the jet tube 7 is fixedly connected to multiple jet heads 8; the multiple jet heads 8 are arranged in a linear array on the side of the jet tube 7, which can disperse the pulse gas into multiple airflows and spray them out at the same time, increasing the rinsing coverage area of ​​the ceramic membrane surface.

[0026] A rotating assembly is used to drive the connecting pipe 6 to rotate. The rotating assembly includes a first bevel gear 9 fixedly mounted on the surface of the outlet pipe 6. A second bevel gear 10 meshes with the outer side of the first bevel gear 9. A first transmission gear 11 is coaxially fixed on the other side of the second bevel gear 10. The second bevel gear 10 is rotatably mounted on the surface of the fixed housing 1. A second transmission gear 12 meshes with the lower side of the first transmission gear 11. The second transmission gear 12 is rotatably mounted on the surface of the fixed housing 1 and coaxially fixed with the impeller 4.

[0027] Furthermore, the diameter of the first bevel gear 9 is larger than that of the second bevel gear 10, and the diameter of the first transmission gear 11 is larger than that of the second transmission gear 12. This gear transmission ratio design can achieve a speed reduction and torque increase effect. When the impeller 4 obtains a high speed due to the airflow impact, the rotation speed of the connecting pipe 6 is kept within a suitable range through multi-stage gear speed reduction. This ensures that the jet head 8 has sufficient rinsing time for each area of ​​the ceramic film surface, and avoids the airflow diffusion caused by excessive speed affecting the rinsing pressure, thereby significantly improving the uniformity and thoroughness of backwashing.

[0028] The working principle of this utility model is as follows:

[0029] When the device is working, the high-pressure pulsed gas generated by the pulsed gas generator 2 is delivered to the fixed housing 1 through the air inlet pipe 3. Since the air inlet pipe 3 is connected to the bottom of the fixed housing 1 at an off-center position, the gas will impact the impeller 4 after entering, causing it to rotate. The rotation of the impeller 4 drives the second transmission gear 12, which is fixed on the same axis, to rotate synchronously. The second transmission gear 12 meshes with the first transmission gear 11, which in turn drives the second bevel gear 10 to rotate. The second bevel gear 10 meshes with the first bevel gear 9, which ultimately drives the connecting pipe 6 to rotate. The connecting pipe 6 drives the jet tube 7 and the jet head 8 to rotate together, so that multiple jet heads 8 make circular motions while spraying pulsed gas, realizing all-round dynamic rinsing of the ceramic membrane surface, effectively eliminating the dead angle problem of traditional fixed rinsing methods.

[0030] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A ceramic membrane filtration apparatus anti-clogging pulse backwash apparatus, characterized by, include: A fixed housing (1) and a pulse gas generator (2), wherein an impeller (4) is rotatably mounted inside the fixed housing (1); The backwash assembly includes an air inlet pipe (3) fixedly connected to the outlet end of the pulse gas generator (2), and the other end of the air inlet pipe (3) is fixedly connected to the bottom of the fixed housing (1) at an off-center position. An air outlet pipe (5) is fixedly installed on the top of the fixed housing (1), and the air outlet pipe (5) is positioned directly above the air inlet pipe (3). The other end of the air outlet pipe (5) is movably connected to a connecting pipe (6), and the other end of the connecting pipe (6) is fixedly connected to a jet cylinder (7). The other side of the jet cylinder (7) is fixedly connected to multiple jet heads (8). A rotating component is used to drive the connecting pipe (6) to rotate.

2. The anti-clogging pulse backflushing device of the ceramic membrane filtration apparatus according to claim 1, characterized by, The rotating assembly includes a first bevel gear (9) fixedly mounted on the surface of the air outlet pipe (5), a second bevel gear (10) meshing with the outer side of the first bevel gear (9), a first transmission gear (11) coaxially fixed on the other side of the second bevel gear (10), and the second bevel gear (10) rotatably mounted on the surface of the fixed housing (1). The lower side of the first transmission gear (11) meshes with a second transmission gear (12), and the second transmission gear (12) rotatably mounted on the surface of the fixed housing (1) and coaxially fixed with the impeller (4).

3. The anti-clogging pulse backflushing device of the ceramic membrane filtration apparatus according to claim 1, wherein The surface of the air outlet pipe (5) is fixedly fitted with a support ring (13), and the support ring (13) is movably embedded in the inner side of the connecting pipe (6).

4. The anti-clogging pulse backflushing device of the ceramic membrane filtration apparatus according to claim 1, wherein A rubber sealing ring (14) is fixedly installed inside the connecting pipe (6), and the rubber sealing ring (14) abuts against the end of the air outlet pipe (5) away from the fixed shell (1).

5. The anti-clogging pulse backflushing device of the ceramic membrane filtration apparatus according to claim 2, wherein The diameter of the first bevel gear (9) is greater than the diameter of the second bevel gear (10), and the diameter of the first transmission gear (11) is greater than the diameter of the second transmission gear (12).

6. The anti-clogging pulse backflushing device of the ceramic membrane filtration apparatus according to claim 3, wherein The support ring (13) is made of PTFE composite material.

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