Disc ceramic membrane MBR sewage treatment device

Abstract

The utility model discloses a disc ceramic membrane MBR (membrane bioreactor) sewage treatment device which comprises a support frame erected on a sewage pool, a plurality of filter units arranged on the support frame and a filtrate pump connected with the filter units, the filtering unit comprises a driving device arranged on the supporting frame, a shaft body connected with the driving device and a filtering disc arranged on the shaft body; the shaft body extends into the sewage pool from the driving device, a drainage pipeline is arranged in the hollow interior of the shaft body, and an opening in one end of the drainage pipeline is communicated with a filtrate pump on the upper end face of the shaft body; the driving device drives the shaft body to rotate to drive the filtering disc to rotate in the sewage pool, and the filtrate pump pumps filtrate filtered by the filtering disc out of the liquid discharging pipeline. According to the utility model, the sewage treatment device is arranged above the sewage pool, and the filter disc adopting the disc ceramic membrane is adopted, so that the occupied area is reduced, and the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of sewage treatment, especially relates to a disc ceramic membrane MBR sewage treatment device. BACKGROUND

[0002] Sewage treatment, as an important part of environmental protection, plays an irreplaceable role in maintaining ecological balance, protecting human health, and achieving sustainable development. Effective sewage treatment not only removes harmful substances from sewage, reducing pollution of natural water bodies, but also alleviates water resource shortages by recycling treated water.

[0003] Among the many sewage treatment technologies, membrane bioreactors (MBR) are widely used due to their efficient solid-liquid separation capabilities and compact design. MBR is a sewage treatment system that combines microbial degradation with the physical filtration function of ultrafiltration or microfiltration membranes. In this process, sewage is first pretreated to remove large particulate matter, then enters a reaction tank containing microorganisms, where organic pollutants are decomposed by microorganisms. Subsequently, the sewage is filtered through a membrane module, which consists of a series of precise pore sizes that can intercept suspended solids, bacteria, and other small particles, allowing purified water to be separated.

[0004] Although MBR has significantly reduced the footprint compared to traditional methods, the space required for large-scale sewage treatment facilities is still relatively large, which is particularly prominent in urban areas where land resources are scarce. Membrane separation equipment commonly used in MBR processes is usually made of organic tubular ultrafiltration membranes or hollow fiber ultrafiltration membranes. These materials require a high-pressure pumping system to drive water flow through the membrane surface, resulting in relatively high energy consumption. Over time, the membranes may become clogged or their performance may decrease, further affecting long-term filtration efficiency. SUMMARY

[0005] The utility model aims at providing a disc ceramic membrane MBR sewage treatment device to solve the technical problems of large footprint and high energy consumption of the sewage treatment device.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the disc ceramic membrane MBR sewage treatment device of the utility model is as follows:

[0007] A disc ceramic membrane MBR sewage treatment device includes a support frame erected on a sewage tank, a plurality of filtration units arranged on the support frame, and a filtrate pump connected to the filtration units.

[0008] The filter unit comprises a driving device arranged on the support frame, a shaft body connected with the driving device, and filter discs arranged on the shaft body; the shaft body extends from the driving device into the sewage pool; a drainage pipe is arranged in the hollow shaft body, and one end of the drainage pipe is open on the upper end surface of the shaft body and communicates with the filtrate pump; the driving device drives the shaft body to rotate and drives the filter discs to rotate in the sewage pool; and the filtrate pump draws the filtrate collected by the filter discs out of the drainage pipe.

[0009] As a further improvement of the present application, the filter disc is provided with a filter groove, the surface of the filter groove is covered with a ceramic membrane, and the rotation of the filter disc forms a tangential flow velocity on the surface of the sewage, and the filtrate passing through the ceramic membrane enters the filter groove.

[0010] As a further improvement of the present application, the surface of the shaft body is provided with a drainage hole communicating with the drainage pipe, the filter groove communicates with the drainage hole, and the filtrate passing through the ceramic membrane enters the drainage pipe from the filter groove through the drainage hole; and the filtrate pump discharges the filtrate from the drainage pipe.

[0011] As a further improvement of the present application, the shaft body is a circular tube, the filter discs are arranged along the axial direction of the shaft body, and the drainage holes are arranged along the radial direction of the shaft body.

[0012] As a further improvement of the present application, the filter unit further comprises connectors, the connectors are sleeved on both sides of the filter discs along the shaft body, the filter discs and the connectors are stacked along the shaft body in sequence, and the connectors and the filter discs are clamped along the shaft body by a locking structure.

[0013] As a further improvement of the present application, the connector is annular, and the two sides thereof towards the filter discs are provided with protruding connecting portions, and the annular filter discs are sleeved on the connecting portions.

[0014] As a further improvement of the present application, the filter groove is bent and extends in the filter disc, one end of the filter groove is open on the inner side of the annular filter disc, the connecting portion is provided with a connecting groove, and the connecting groove connects the filter groove and the drainage hole.

[0015] As a further improvement of the present application, annular sealing grooves are arranged on the two sides of the connector and surround the connecting portions, sealing pads are arranged in the sealing grooves, and one side of the sealing pad towards the filter disc is discontinuously protruding.

[0016] As a further improvement of the present application, the driving device comprises a driving motor and a driving housing, a driving shaft of the driving motor drives the shaft body to rotate in the driving housing, and the shaft body is rotatably connected with the driving housing. Advantages

[0017] By arranging the filter groove covered with the ceramic membrane on the filter disc, the sewage can form a tangential velocity on the surface during rotation, which not only increases the contact opportunity of the water flow and the membrane, but also helps to prevent the deposition of pollutants on the membrane surface, thereby improving the filtration efficiency and the filtrate quality.

[0018] The ceramic membrane is used to replace the traditional organic tubular or hollow fiber ultrafiltration membrane, and since the ceramic material has higher mechanical strength and better chemical corrosion resistance, the cleaning frequency and the pressure requirement during operation can be reduced, thereby reducing the energy consumption. Meanwhile, the optimized fluid dynamics design also reduces the requirement of the system on the pumping pressure, further saving the energy. Compared with the organic membrane, the ceramic membrane is more durable, is not easily affected by microbial erosion, and is not easily aged, and thus can work stably for a long time, reducing the cost and frequency of replacing the membrane assembly and reducing the maintenance cost.

[0019] The device integrates the driving device, the shaft body and the plurality of filter discs on a support frame, and the filtration unit can be vertically installed above the sewage pool, thereby greatly reducing the floor area compared with the traditional MBR system, and being particularly suitable for use in urban areas or other places with limited land resources.

[0020] The design of the connector and the sealing gasket in the annular sealing groove thereof enhances the sealing between the components, ensures that no untreated liquid is leaked during the filtration process, and the locking structure ensures that all the components are tightly fixed together, and the good operation state can be maintained even in harsh environments. The filter discs and the connectors are stacked along the shaft body in sequence and are clamped by the locking structure, thereby simplifying the assembly process and making the installation of the entire system more convenient and fast. In addition, when a specific part needs to be cleaned or replaced, the corresponding component can also be easily disassembled for operation, greatly facilitating the daily maintenance work. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of a disc ceramic membrane MBR sewage treatment device of the present application.

[0022] Figure 2 It is a structural schematic view of a filtration unit.

[0023] Figure 3 It is a structural schematic view of a filter disc and a connector.

[0024] Marked in the figure: 1, support frame; 2, filter unit; 21, drive device; 211, drive motor; 212, drive housing; 22, shaft body; 221, drainage pipeline; 222, drainage hole; 23, filter disc; 231, filter groove; 24, connector; 241, connecting part; 242, connecting groove; 243, sealing groove; 244, sealing pad; 3, filtrate pump; 4, sewage tank. DETAILED DESCRIPTION

[0025] In order to deepen the understanding of the utility model, the utility model will be further described in the following combined with examples and drawings, the examples are only used to explain the utility model, and do not constitute the limitation to the protection scope of the utility model.

[0026] Implementation example:

[0027] As Figure 1 Indicated, a disc ceramic membrane MBR sewage treatment device is erected above the sewage tank 4 through the support frame 1, and a plurality of filter units 2 are evenly and spacedly arranged on the support frame 1, and the clear liquid pump 3 transports the filtrate from the filter unit 2 to the next treatment unit after the filtrate is pumped out from the filter unit 2. The support frame 1 is the framework of the whole filter device, which bears and fixes the filter unit 2, and ensures that the filter unit 2 can be stably installed above the sewage tank. The main body of the sewage treatment device is arranged above the sewage tank through the support frame 1, and the stacking in the vertical direction maximizes the reduction of the floor area.

[0028] The drive device 21 in the filter unit 2 is arranged above the support frame 1, the shaft body 22 penetrates the support frame 1 from top to bottom and extends into the sewage tank, and the filter disc 23 is sleeved at the lower part of the shaft body 22 below the water surface of the sewage tank 4. The shaft body 22 is a hollow pipe, the upper part is rotatably linked with the drive device 21, the hollow part is the drainage pipeline 221, the opening end of the drainage pipeline 221 is connected with the filtrate pump 4 at the upper end of the shaft body 22, and a plurality of drainage holes 222 are arranged on the surface of the shaft body 22 in the radial direction. The lower part of the shaft body 22 is relatively protruding, the connector 24 and the filter disc 23 are stacked upwards from the protruding part in sequence, the connector 24 and the filter disc 23 are extruded from the protruding part upwards through the locking structure, and the stable installation of the filter disc 23 is realized. In the embodiment, the locking structure is a nut matched with the outer threaded part of the shaft body, and the connector 24 and the filter disc 23 are extruded by rotating the nut.

[0029] As Figure 3As shown, the connector 24 is a ring structure that is wrapped around the shaft body 22, with the two sides protruding towards the filter disc 23 to form a connecting portion 241. The ring-shaped filter disc 23 is wrapped around the connecting portion 241 and is clamped by the two sides of the connector 24. The connecting portion 241 is provided with a connecting groove 242 that is in communication with the drainage hole 222 in the radial direction. The filter disc 232 is provided with a filter groove 231 that extends along the surface and bends. The opening end of the filter groove 231 is connected to the inner side of the ring-shaped filter disc 23, and the two sides of the filter disc 23 are covered by the ceramic membrane. The opening end of the filter groove 231 is in communication with the connecting groove 242. The filtrate that passes through the ceramic membrane enters the filter groove 231, then flows through the connecting groove 242 and the drainage hole 222 into the drainage channel 221, and finally is pumped out by the filtrate pump 3 and discharged into the next process. The side of the connector 24 located outside the connecting portion 241 is provided with a sealing groove 243, and a corresponding ring-shaped sealing gasket 244 is arranged in the sealing groove 243. The side of the sealing gasket 244 facing the filter disc 23 is convex, which prevents the filter disc 23 from shifting during rotation.

[0030] The driving device 21 includes a driving motor 211 and a driving housing 212. The driving housing 212, as a carrier of the driving device 21, is vertically arranged on the end face of the support frame 1. The shaft body 22 penetrates the driving housing 212 and enters the sewage pool 4. The output shaft of the driving motor 211 drives the shaft body 22 to rotate in the driving housing 212. The shaft body 22 is rotatably connected to the driving housing 212 through a bearing. The driving motor 211 provides rotational power for the shaft body 22 and the filter disc 23 connected thereto. By precisely controlling the rotational speed of the shaft body, it can ensure that the filter disc rotates at an appropriate tangential flow rate in the sewage pool, thereby optimizing the water flow conditions and improving the filtration efficiency. Different sewage treatment requirements may require adjustment of the rotational speed of the filter disc in order to achieve the best treatment effect. The driving device can flexibly adjust the rotational speed according to the actual working conditions, so that the system can operate efficiently under different load conditions. In this embodiment, the driving motor 211 is a speed reducer, which realizes lower speed but higher torque output. This is particularly important for MBR systems that require stable and slow rotation to ensure optimal filtration efficiency. The low-speed high-torque characteristic helps to maintain the smooth rotation of the filter disc in the sewage pool, avoiding the destruction of the biofilm caused by turbulence or shear force due to excessive rotation speed.

[0031] The core part of the sewage treatment device is the filter disc 23 covered with ceramic membrane, when the sewage passes through the filter disc 23 rotating under the action of the driving device 21, a tangent flow velocity is formed on the surface, so that the sewage can uniformly contact the ceramic membrane surface, since the ceramic membrane has a very small and uniformly distributed pore size, it can effectively intercept suspended solids, bacteria and other small particles, and allow clean water to pass through and enter the filter tank 231. The filtrate passing through the ceramic membrane will enter the filter tank 231 inside each filter disc 23, and will be collected into the drain pipe 221 in the shaft body 22 through the drain hole 222. Then, the filtrate pump 3 will draw these filtered liquids from the drain pipe 221, and put them into the next treatment process. Over time, contaminants that are difficult to naturally shed may accumulate on the membrane surface, affecting filtration efficiency. The device can restore membrane flux and prolong service life through the backwashing system.

[0032] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A disc ceramic membrane MBR sewage treatment device, characterized in that, The utility model provides a sewage treatment device, comprising a support frame erected on a sewage pool, a plurality of filter units arranged on the support frame, and a filtrate pump connected with the filter units. The filter unit comprises a driving device arranged on the support frame, a shaft body connected with the driving device, and a filter disc arranged on the shaft body; the shaft body extends from the driving device into the sewage pool; a drainage pipe is arranged in the hollow interior of the shaft body, and one end of the drainage pipe is open on the upper end surface of the shaft body and communicates with the filtrate pump; the driving device drives the shaft body to rotate and drives the filter disc to rotate in the sewage pool; and the filtrate pump draws the filtrate collected by the filter disc out of the drainage pipe. The filter disc is provided with a filter groove, the surface of the filter groove is covered with a ceramic membrane, and the rotation of the filter disc causes the sewage to form a tangential flow velocity on the surface, and the filtrate passing through the ceramic membrane enters the filter groove. The surface of the shaft body is provided with a drainage hole communicating with the drainage pipe, the filter groove communicates with the drainage hole, and the filtrate passing through the ceramic membrane enters the drainage pipe from the filter groove through the drainage hole; and the filtrate pump discharges the filtrate from the drainage pipe.

2. The ceramic disc membrane MBR wastewater treatment apparatus according to claim 1, wherein The shaft body is in the shape of a circular tube, the filter discs are arranged axially along the shaft body, and the drainage holes are arranged radially along the shaft body.

3. The disc ceramic membrane MBR sewage treatment device according to claim 1, characterized in that, The filter unit further comprises a connector, the connector is sleeved on both sides of the filter disc along the shaft body, the filter disc and the connector are stacked in sequence along the shaft body, and the connector and the filter disc are clamped along the shaft body by a locking structure.

4. The ceramic disc membrane MBR wastewater treatment apparatus according to claim 3, characterized by The connector is annular, and the two sides thereof towards the filter disc are provided with protruding connecting portions, and the annular filter disc is sleeved on the connecting portions.

5. The ceramic disc membrane MBR wastewater treatment device according to claim 4, characterized in that, The filter groove extends in the filter disc in a bent manner, one end of the filter groove is open on the inner side of the annular filter disc, the connecting portions are provided with connecting grooves, and the connecting grooves connect the filter groove and the drainage hole.

6. The ceramic disc membrane MBR wastewater treatment device according to claim 4, characterized in that, The two sides of the connector are provided with annular sealing grooves in the periphery of the connecting portions, sealing pads are arranged in the sealing grooves, and one side of the sealing pads towards the filter disc is discontinuously protruding.

7. The ceramic disc membrane MBR wastewater treatment device according to claim 1, characterized in that, The driving device comprises a driving motor and a driving housing, a driving shaft of the driving motor drives the shaft body to rotate in the driving housing, and the shaft body is rotatably connected with the driving housing.

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