Rotary aeration-free filtering membrane module device
By using a rotary aeration-free filter membrane module to remove contaminants from the membrane surface through centrifugal force, the problem of high power consumption in MBR filter membrane devices is solved, achieving energy saving and consumption reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-30
- Publication Date
- 2026-03-13
AI Technical Summary
Existing MBR filtration membrane devices consume a lot of electrical energy during operation, mainly because a blower is needed to provide aeration to wash away sludge and other pollutants on the membrane surface, resulting in high operating costs.
The device uses a rotary, aeration-free membrane filter module. An electric reducer drives the membrane module to rotate, and centrifugal force is used to make the sewage flow and carry away the pollutants on the membrane surface, replacing the traditional aeration method and reducing power consumption.
It achieves effective removal of pollutants from the membrane surface without the use of a blower for aeration, reducing power consumption and operating costs, with results approaching those of traditional aeration methods.
Smart Images
Figure CN223990995U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a filter membrane module, belonging to the field of environmental wastewater treatment technology, and in particular to a rotary non-aeration filter membrane module used in wastewater treatment projects. Background Technology
[0002] Currently, 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. A membrane module consists of membrane elements and a membrane frame. The membrane elements are housed within the membrane frame and include hollow fiber membrane modules and flat sheet membrane modules.
[0003] Hollow fiber membrane modules, such as Figure 6 As shown: its horizontally placed upper water outlet cavity is located at the upper part of the hollow fiber membrane, and the lower water outlet cavity is located at the lower part of the hollow fiber membrane. The cavity inside the hollow fiber membrane filament is connected to the cavity inside the upper water outlet cavity and the lower water outlet cavity. The upper water outlet pipe is located at one or both ends of the upper water outlet cavity, and the lower water outlet pipe is located at one or both ends of the lower water outlet cavity.
[0004] Flat sheet membrane modules, such as Figure 7 As shown, its structure is generally composed 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 1 to 2 millimeters thick non-woven fabric, which provides space for supporting the water flow within the two membranes. There are two guide plates, one on each side of the support plate, and two membranes, one on each side of the guide plates. They are welded or bonded to the support plate around the perimeter. At least one upper outlet pipe is provided on the top edge of the support plate. The upper outlet pipe is connected to 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 upper outlet pipe.
[0005] At runtime, such as Figure 8As shown: A membrane frame is installed 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. An aeration pipe is installed below the lower horizontal pipe and connected to an aeration blower through an air supply pipe. A flat sheet membrane module or a hollow fiber membrane module is vertically installed between the upper and lower horizontal pipes of the membrane frame. The upper and lower outlet pipes of the membrane module are connected to the water collection pipe through a connecting pipe. One end of the permeate main pipe is connected to the inlet of the permeate 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 permeate pump, and the other end is connected to the clear water tank. During water production, the aeration blower is started first. Air bubbles flow out through the through-holes of the aeration pipe. As they rise, they come into contact with the surface of the hollow fiber membrane filaments or flat sheet membrane, carrying away the pollutants on the surface of the hollow fiber membrane filaments or flat sheet membrane. Then, the water production pump is started. Through the negative pressure suction of the water production pump, the pollutants in the wastewater are separated from the water at the hollow fiber membrane filaments or flat sheet membrane. The pollutants are trapped on the outside of the hollow fiber membrane filaments or flat sheet membrane, while the water enters the inside of the hollow fiber membrane filaments or flat sheet membrane, and then flows from the upper outlet pipe and lower outlet pipe into the water collection pipe, water production pump and clear water pipe, and finally into the clear water tank.
[0006] Membrane modules typically operate intermittently, meaning the permeate pump is started and draws water under negative pressure for 8 minutes, then stopped for 2 minutes, while the aeration blower runs continuously. During the period when the permeate pump is not running, the dosing pump is started to deliver cleaning or disinfecting agents from the dosing tank to the inside of the membrane module through the dosing pipe. As the agents permeate through the pores of the hollow fiber or flat sheet membrane to the outside of the membrane, pollutants on the membrane are removed.
[0007] Whether hollow fiber membranes or flat sheet membranes, they can be classified into microfiltration membranes and ultrafiltration membranes according to their pore size. Microfiltration membranes typically have pore sizes between 0.1 and 10 micrometers, while ultrafiltration membranes typically have pore sizes between 0.002 and 0.09 micrometers. The existing MBR filtration membrane devices have the following drawback: high operating costs.
[0008] The operation of an MBR membrane system requires a blower to provide aeration to flush out sludge and other pollutants from the membrane surface. A large portion of the electrical energy consumed during operation comes from the blower used for aeration. Due to the large amount of electrical energy consumed during operation, the operating and maintenance costs of MBR filter membranes are relatively high. Summary of the Invention
[0009] To address the shortcomings of existing technologies, this invention provides a rotary, aeration-free filter membrane module. This device eliminates the need for a blower during operation, thus reducing energy consumption.
[0010] The technical solution of this utility model to solve the above problems is: a rotary non-aeration filter membrane module, the structure of which includes a base or main support, a central water collection chamber, an upper support, a lower support, a power mechanism, casters, an upper water outlet vertical pipe or a side water outlet horizontal pipe, a mechanical seal device, a permeate main pipe, a dosing pipe, and a membrane module; the central water collection chamber is vertically or horizontally arranged in the body of the sewage tank, the base is arranged at the lower part of the vertically arranged central water collection chamber, and its lower part is fixedly connected to the bottom of the tank body, a bushing or a shaft is vertically arranged in the center of the upper part, and a shaft or a bushing is vertically arranged at the lower part of the vertically arranged central water collection chamber, the shaft is inserted into the hole of the bushing, and the top is connected to the lower part of the upper water outlet vertical pipe, the upper water outlet vertical pipe is vertically arranged, and the mechanical seal device is arranged in the upper water outlet vertical pipe. The top of the structure; there are two main supports, set at both ends of the horizontally arranged central water collection cavity, with the lower part fixedly connected to the bottom of the pool body, and a bushing set at the top. One end of the horizontally arranged central water collection cavity is the lower end, with a horizontally arranged shaft inserted into the bushing of the main support. The other end of the horizontally arranged central water collection cavity is the upper end. The side water outlet horizontal pipe passes through the hole in the bushing of the other side of the main support, with one end connected to the upper end of the central water collection cavity and the other end connected to the mechanical seal device; at least two upper water inlet connectors are set at right angles to the upper side of the central water collection cavity, and at least two lower water inlet connectors are set at right angles to the lower side of the central water collection cavity. The upper support is set at right angles to the central water collection cavity and is set on the upper side of the central water collection cavity. The inlet connector is located between the upper edge of the central water collection cavity and the inner end of the inlet connector, which is fixedly connected to the central water collection cavity. The lower support is set at a right angle to the central water collection cavity and is located on the lower side of the central water collection cavity, between the lower inlet connector and the lower edge of the central water collection cavity, with one end of the lower support fixedly connected to the central water collection cavity. The membrane module is a hollow fiber membrane module or a flat sheet membrane module. The upper edge of the membrane module is connected to the upper support, and the lower edge is connected to the lower support. The upper outlet pipe of the membrane module is connected to the upper inlet connector or to the upper inlet connector via a connecting pipe. The lower outlet pipe of the membrane module is connected to the lower inlet connector or to the lower inlet connector via a connecting pipe. One end of the product water main pipe is connected to the mechanical seal device, and the other end is connected to the inlet of the product water pump. The connection consists of a dosing pipe, one end of which is connected to the main product water pipe, and the other end connected to the outlet of the dosing metering pump; the power mechanism includes an electric reducer, gears or sprockets and chains, the electric reducer being fixedly mounted on a motor bracket or on the top of the pool wall, one gear being mounted on the shaft of the electric reducer, and another gear being mounted on the upper outer side of the upper outlet vertical pipe, the gear on the shaft of the electric reducer meshing with the gear on the upper outlet vertical pipe; or one sprocket being mounted on the shaft of the electric reducer, and another sprocket being mounted on the upper outer side of the upper outlet vertical pipe or the outer side of the side outlet horizontal pipe, the sprocket on the shaft of the electric reducer being connected to the sprocket on the upper outlet vertical pipe or the sprocket on the side outlet horizontal pipe via a chain; casters are mounted on the lower part of the lower support outside the vertically mounted central water collection cavity.
[0011] The above-mentioned flat sheet membrane module has an upper outlet pipe located on the upper part of the side of the support plate, which is horizontally arranged. An annular groove is provided on the outer side of the upper outlet pipe, and a sealing ring is placed in the groove. The lower outlet pipe is located on the lower part of the side of the support plate, which is horizontally arranged. An annular groove is provided on the outer side of the lower outlet pipe, and a sealing ring is placed in the groove.
[0012] Its beneficial effects are:
[0013] This utility model of a rotary non-aeration filter membrane module operates by an electric reducer driving the membrane module to rotate along the central water collection chamber. Due to centrifugal force, sewage flows from one side of the central water collection chamber to the surrounding areas. When the water flows over the surface of the hollow fiber membrane or membrane sheet of the membrane module, it carries away the pollutants on the surface. This can achieve the same effect as the air bubbles generated by the blower aeration to wash the membrane surface. No blower is required during operation, which can save electricity and reduce operating costs. Attached Figure Description
[0014] The present invention will be further described with reference to the accompanying drawings and embodiments.
[0015] Figure 1 This is a schematic diagram of the rotary non-aeration filter membrane module of this utility model. The central water collection chamber is vertically arranged in the figure, and the front pool wall and a set of membrane modules are removed.
[0016] Figure 2 This is a top-down view of the vertically arranged central water collection chamber, gears, and mechanical seal device of the rotary non-aeration filter membrane module of this utility model.
[0017] Figure 3 This is a schematic diagram of the rotary non-aeration filter membrane module of this utility model. The central water collection chamber is arranged horizontally, and the front pool wall has been removed.
[0018] Figure 4 This is a schematic diagram of the flat sheet membrane module of the rotary aeration-free filter membrane module of this utility model.
[0019] Figure 5 This is a schematic diagram of the operation of the rotary non-aeration filter membrane module of this utility model. The front walls of the sewage tank and the clear water tank have been removed from the diagram.
[0020] Figure 6 This is a schematic diagram of a hollow fiber membrane module in the prior art.
[0021] Figure 7 This is a schematic diagram of a conventional flat-panel membrane module, with the lower front membrane removed.
[0022] Figure 8This is a schematic diagram of the operation of an existing submersible filter membrane module. The front walls of the sewage tank and the clear water tank have been removed from the diagram.
[0023] In the diagram, 1 is the hollow fiber membrane, 2 is the membrane sheet, 3 is the upper outlet pipe, 4 is the lower outlet pipe, 5 is the base, 6 is the central water collection chamber, 7 is the upper support, 8 is the lower support, 9 is the upper outlet riser, 10 is the mechanical seal, 11 is the main product water pipe, 12 is the chemical dosing pipe, 13 is the water collection pipe, 14 is the bushing, 15 is the shaft, 16 is the upper inlet connector, 17 is the lower inlet connector, 18 is the hollow fiber membrane module, 19 is the flat sheet membrane module, 20 is the electric reducer, 21 is the connecting pipe, 22 is the gear, and 23 is the sprocket. 4 is the chain, 25 is the upper water outlet chamber, 26 is the product water pump, 27 is the lower water outlet chamber, 28 is the annular groove, 29 is the sealing ring, 30 is the membrane frame, 31 is the aeration pipe, 32 is the aeration blower, 33 is the clear water pipe, 34 is the support plate, 35 is the guide vane, 36 is the motor bracket, 37 is the sewage tank, 38 is the clear water tank, 39 is the dosing tank, 40 is the dosing metering pump, 41 is the upper horizontal pipe, 42 is the vertical pipe, 43 is the lower horizontal pipe, 44 is the air supply pipe, 45 is the tank wall, 46 is the caster, 47 is the main support, and 48 is the side water outlet horizontal pipe. Detailed Implementation
[0024] The structure and features of this utility model's rotary non-aeration filter membrane module are described in detail below with reference to the accompanying drawings:
[0025] Rotary aeration-free filter membrane module, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown: Its structure includes a base or main support, a central water collection chamber, an upper support, a lower support, a power mechanism, casters, an upper outlet vertical pipe or a side outlet horizontal pipe, a mechanical seal device, a permeate main pipe, a dosing pipe, and a membrane module; the central water collection chamber is vertically or horizontally installed inside the wastewater tank; the base is located at the lower part of the vertically installed central water collection chamber, and its lower part is fixedly connected to the bottom of the tank; a bushing or a shaft is vertically installed in the center of the upper part; a shaft or a bushing is vertically installed at the lower part of the vertically installed central water collection chamber, and the shaft is inserted into the hole of the bushing, with its top connected to the lower part of the upper outlet vertical pipe; the upper outlet vertical pipe is vertically installed, and the mechanical seal device is located at the top of the upper outlet vertical pipe; there are two main supports, located in the horizontally installed central support. The central water collection chamber is fixedly connected to the bottom of the pool body at both ends, with a bushing at the top. One end of the horizontally positioned central water collection chamber is the lower end, with a horizontally positioned shaft inserted into the bushing of the main support. The other end of the horizontally positioned central water collection chamber is the upper end. A side outlet horizontal pipe passes through a hole in the bushing of the other side of the main support. One end of the side outlet horizontal pipe connects to the upper end of the central water collection chamber, and the other end connects to a mechanical seal. At least two upper inlet connectors are perpendicular to the upper side of the central water collection chamber, and at least two lower inlet connectors are perpendicular to the lower side of the central water collection chamber. The upper support is perpendicular to the central water collection chamber. The upper inlet connectors are located on the upper side of the central water collection chamber. Between the upper edges, one inner end is fixedly connected to the central water collection cavity; the lower support is set at a right angle to the central water collection cavity, located on the lower side of the central water collection cavity, between the lower inlet connector and the lower edge of the central water collection cavity, with one inner end fixedly connected to the central water collection cavity; the membrane module is a hollow fiber membrane module or a flat sheet membrane module, with the upper edge of the membrane module connected to the upper support and the lower edge connected to the lower support; the upper outlet pipe of the upper part of the membrane module is connected to the upper inlet connector or connected to the upper inlet connector via a connecting pipe; the lower outlet pipe of the lower part of the membrane module is connected to the lower inlet connector or connected to the lower inlet connector via a connecting pipe; one end of the permeate main pipe is connected to the mechanical seal device, and the other end is connected to the inlet of the permeate pump; dosing pipe One end is connected to the main water production pipe, and the other end is connected to the outlet of the dosing metering pump; the power mechanism includes an electric reducer, gears or sprockets and chains. The electric reducer is fixedly mounted on the motor bracket or on the top of the pool wall. One gear is mounted on the shaft of the electric reducer, and the other gear is mounted on the upper outer side of the upper water outlet vertical pipe. The gear on the shaft of the electric reducer meshes with the gear on the upper water outlet vertical pipe; or one sprocket is mounted on the shaft of the electric reducer, and the other sprocket is mounted on the upper outer side of the upper water outlet vertical pipe or the outer side of the side water outlet horizontal pipe. The sprocket on the shaft of the electric reducer is connected to the sprocket on the upper water outlet vertical pipe or the sprocket on the side water outlet horizontal pipe by a chain; the casters are mounted on the lower part of the lower support outside the vertically mounted central water collection cavity.
[0026] The above-mentioned flat sheet membrane module has an upper outlet pipe located on the upper part of the side of the support plate, which is horizontally arranged. An annular groove is provided on the outer side of the upper outlet pipe, and a sealing ring is placed in the groove. The lower outlet pipe is located on the lower part of the side of the support plate, which is horizontally arranged. An annular groove is provided on the outer side of the lower outlet pipe, and a sealing ring is placed in the groove.
[0027] The principle and operation of this rotary non-aeration filter membrane module are described in detail below with reference to the accompanying drawings:
[0028] Example:
[0029] Taking the application of this novel rotary non-aeration filter membrane module with a vertically arranged central water collection chamber submerged in a sewage tank as an example, such as... Figure 5 As shown: The upper and lower outlet pipes of the hollow fiber membrane module or flat sheet membrane module are connected to the upper and lower inlet connectors. The upper end of the permeate main pipe is connected to the inlet of the permeate pump. The outlet of the permeate pump is connected to one end of the clear water pipe. The other end of the clear water pipe is set in the clear water tank. The inlet of the dosing metering pump is connected to the dosing tank through a pipe, and the outlet is connected to the dosing pipe.
[0030] Once the wastewater level in the wastewater tank is above the top of the membrane module, the electric reducer is started, driving the membrane module to rotate along the central collection chamber. Simultaneously, the permeate pump is activated. Through the negative pressure suction of the permeate pump, large-diameter pollutants are trapped on the outer surface of the hollow fiber membrane or flat sheet membrane due to the filtration pores of the membrane. Clean water passes through the filtration pores of the hollow fiber membrane or flat sheet membrane and enters the membrane itself. It then flows through the upper and lower outlet pipes into the central collection chamber, followed by the upper outlet riser, the main permeate pipe, the permeate pump, and finally the clean water pipe into the clean water tank. The main difference between this invention and existing technologies is that the flow of wastewater replaces the aeration bubbles. Through on-site comparative observation, the surface rinsing of the membrane module was observed. A single 0.75KW electric reducer is sufficient to drive the membrane module's rotation for a 300 square meter membrane area unit, enabling the cleaning of surface pollutants through water flow. In contrast, existing technologies using blowers require a 3KW blower running continuously 24 hours a day. The present invention's rotary aeration-free membrane module solution achieves a similar level of pollutant removal efficiency to existing blower-based aeration solutions, with significant energy savings. Therefore, it can be concluded that using the present invention's rotary aeration-free membrane module saves energy and reduces operating costs compared to existing technologies.
[0031] 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 rotary type aerator-free filter membrane module is an improvement of filter membrane module, mainly composed of membrane module, water production main pipe and power mechanism; its characteristics are: The structure comprises a base or main support, a central water collecting cavity, an upper support, a lower support, a power mechanism, a caster, an upper water outlet vertical pipe or a side water outlet horizontal pipe, a mechanical sealing device, a water production main pipe, a dosing pipe and a membrane module; the central water collecting cavity is vertically or transversely arranged in a pool body of a sewage pool; the base is arranged at a lower part of the vertically arranged central water collecting cavity and is fixedly connected with a bottom of the pool body; a shaft sleeve or a shaft rod is vertically arranged at a middle part of an upper part of the base; a shaft rod is vertically arranged at a lower part of the vertically arranged central water collecting cavity and is inserted into a hole of the shaft sleeve; a top of the vertically arranged central water collecting cavity is connected with a lower part of the upper water outlet vertical pipe; the mechanical sealing device is arranged at a top of the upper water outlet vertical pipe; the main support is provided with two parts, which are arranged at two ends of the transversely arranged central water collecting cavity, are fixedly connected with the bottom of the pool body, are provided with shaft sleeves at top parts, and are provided with a shaft rod at a lower end of the transversely arranged central water collecting cavity; a shaft rod is inserted into the shaft sleeve of the main support; a side water outlet horizontal pipe passes through a hole of the shaft sleeve of the other main support, is connected with the upper end of the central water collecting cavity at one end, and is connected with the mechanical sealing device at the other end; at least two upper water inlet connectors are arranged at right angles with the side of the upper part of the central water collecting cavity; at least two lower water inlet connectors are arranged at right angles with the side of the lower part of the central water collecting cavity; the upper support is arranged at a right angle with the central water collecting cavity, is arranged between the side of the upper part of the central water collecting cavity and the upper edge of the central water collecting cavity, and is fixedly connected with the central water collecting cavity at an inner side end; the lower support is arranged at a right angle with the central water collecting cavity, is arranged between the side of the lower part of the central water collecting cavity and the lower edge of the central water collecting cavity, and is fixedly connected with the central water collecting cavity at an inner side end; the membrane module is a hollow fiber membrane module or a flat sheet membrane module; an upper edge of the membrane module is connected with the upper support, a lower edge of the membrane module is connected with the lower support, an upper water outlet pipe of the membrane module is connected with the upper water inlet connector or is connected with the upper water inlet connector through a connecting pipe; a lower water outlet pipe of the membrane module is connected with the lower water inlet connector or is connected with the lower water inlet connector through a connecting pipe; one end of the water production main pipe is connected with the mechanical sealing device, the other end is connected with a liquid inlet of a water production pump, one end of the dosing pipe is connected with the water production main pipe, and the other end is connected with a liquid outlet of a dosing metering pump; the power mechanism comprises an electric speed reducer, a gear or a chain wheel and a chain; the electric speed reducer is fixedly arranged on a motor support or on a top of a pool wall; one gear is arranged on a shaft of the electric speed reducer, and the other gear is arranged on an outer side of an upper part of the upper water outlet vertical pipe; the gear on the shaft of the electric speed reducer is connected with the gear on the upper water outlet vertical pipe in a meshing mode; or one chain wheel is arranged on the shaft of the electric speed reducer, and the other chain wheel is arranged on the outer side of the upper part of the upper water outlet vertical pipe or on the outer side of the side water outlet horizontal pipe; the chain wheel on the shaft of the electric speed reducer is connected with the chain wheel on the upper water outlet vertical pipe or the chain wheel on the side water outlet horizontal pipe through the chain; the caster is arranged at a lower part of the lower support outside the vertically arranged central water collecting cavity.
2. The rotating, aerator-free, filter membrane panel of claim 1, wherein: The upper water outlet pipe of the flat membrane assembly is arranged at the upper part of the side of the support plate and is horizontally arranged, and an annular groove is arranged outside the upper water outlet pipe, and a sealing ring is arranged in the groove; the lower water outlet pipe is arranged at the lower part of the side of the support plate and is horizontally arranged, and an annular groove is arranged outside the lower water outlet pipe, and a sealing ring is arranged in the groove.