A membrane group filtering device for advanced treatment of reclaimed water

Abstract

The utility model belongs to the depth water treatment technical field, concretely is a kind of reclaimed water depth treatment membrane group filtration equipment, including the casing being equipped with water inlet and water outlet, be equipped with multiple filter membrane cavities in the casing, the filter membrane cavity includes filter membrane, the filter membrane cavity is hollow structure, the water inlet is connected with casing, each filter membrane cavity is equipped with a filter membrane water outlet, the filter membrane water outlet is connected with filter membrane water pipeline, the filter membrane water pipeline is connected with water outlet, flush device is equipped on the filter membrane cavity, the flush device is used to flush filter membrane, the bottom of casing is equipped with waste outlet, the utility model discloses filter membrane is designed into filter membrane cavity, so that water is filtered to filter membrane cavity inside in casing, so that multiple filter membrane cavities can work simultaneously, so that filtration efficiency is high and can reach the standard of recycled water.

Description

Technical Field

[0001] This utility model relates to the field of advanced water treatment technology, specifically a membrane filtration device for advanced greywater treatment. Background Technology

[0002] With the acceleration of urbanization and population growth, the discharge of water, especially wastewater, is increasing year by year. Traditional wastewater treatment processes, such as activated sludge processes and oxidation ditches, can effectively remove most organic matter and suspended solids, but the effluent quality often fails to meet increasingly stringent discharge standards or the requirements for reclaimed water reuse. Advanced water treatment is a technology that further treats wastewater based on conventional wastewater treatment processes, aiming to reduce the toxicity of wastewater and improve water quality to meet discharge standards or reuse requirements.

[0003] Therefore, a membrane filtration device for deep treatment of greywater was designed based on the above technical problems. Utility Model Content

[0004] To address the current problem that traditional wastewater treatment methods cannot meet discharge standards or meet the need for direct reuse of treated wastewater, this utility model proposes a membrane filtration device for deep treatment of treated wastewater.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a deep treatment membrane filtration device, including a closed shell with an inlet and an outlet, a plurality of filter membrane cavities are provided inside the shell, each filter membrane cavity includes a filter membrane, the filter membrane cavity is a hollow structure, the inlet is connected to the shell, each filter membrane cavity is provided with a filter membrane outlet, the filter membrane outlet is connected to a filter water outlet pipe, the filter water outlet pipe is connected to the outlet, the filter membrane cavity is provided with a rinsing device for rinsing the filter membrane, the bottom of the shell is provided with a waste outlet, a connecting pipe is connected to the inlet, and a pressure pump is provided on the connecting pipe.

[0006] Working Principle: Existing deep treatment technologies for greywater utilize traditional medium-density fiber membranes for filtration. This filtration method involves directly passing water through the traditional medium-density fiber membrane, which suffers from low filtration efficiency, large footprint, high pretreatment requirements, and complex cleaning. Therefore, this application was designed to address these technical problems. This application features multiple filter membrane chambers within the housing. The inlet is directly connected to the housing, allowing the wastewater to be filtered to be directly poured into the housing, filling it with water. A connecting pipe with a pressure pump is installed at the outlet, applying pressure to the housing and forcing the greywater to be treated to pass through the filter membrane chambers under positive pressure, thus achieving filtration. The filtered water then flows out through the filter outlet pipe to the outlet.

[0007] Preferably, the filter membrane cavity is cylindrical and includes two circular mounting brackets at both ends. The filter membrane is arranged around the two circular mounting brackets. The cylindrical shape of the filter membrane cavity makes it less likely for dead corners to exist inside the filter membrane cavity, and at the same time, it eliminates the need to fold the filter membrane, thus avoiding the problem of damage at the folds.

[0008] Preferably, the rinsing device includes an annular tube frame surrounding the filter membrane, the annular tube frames being connected by connecting pipes, the connecting pipes being connected to a water source, and a solenoid valve being provided at the connection between the water source and the connecting pipes. The annular tube frame is provided with multiple flushing holes facing the filter membrane, and the arrangement of multiple annular tube frames can fully cover the rinsing of the filter membrane without affecting its operation.

[0009] Preferably, the water jet from the flushing hole forms a 30-45° angle with the filter membrane, allowing the annular tube frame to cover a larger area for flushing the filter membrane, generating greater flushing water pressure and thus a stronger flushing force.

[0010] Preferably, the filter membrane is detachably connected to the circular mounting bracket, which facilitates the replacement of the filter membrane.

[0011] Preferably, the housing is cylindrical, and the multiple filter membrane cavities are evenly arranged around the inner wall of the housing, so that the arrangement can be more reasonable and the area occupied by p is smaller.

[0012] Preferably, each of the filter membrane outlet pipes is equipped with a flow meter, and a lower water level gauge is installed inside the housing. The lower water level gauge is located at the lowest end of the lowest filter membrane cavity. A solenoid valve is installed at the waste outlet. A PLC controller is installed on the housing. The PLC controller is electrically connected to the lower water level gauge, the solenoid valve, and the flushing device to facilitate monitoring of the filter membrane through the flow meter. If the flow meter shows a flow rate lower than the normal value, it indicates that the filter membrane needs cleaning. When the PLC controller detects that the flow meter value is lower than the normal value, it stops the water intake, opens the solenoid valve to drain the water, and closes the solenoid valve when the water level reaches the lower water level gauge. The PLC controller then opens the second solenoid valve to control the flushing device to operate for cleaning. After cleaning is completed, the flushing device is closed, and water continues to enter the housing for further filtration.

[0013] Preferably, the rinsing device is equipped with a timer, which is electrically connected to the PLC controller, and the timer setting can control the rinsing time each time.

[0014] Preferably, the pore size of the filter membrane is 0.01~0.1μm.

[0015] The advantages of this utility model are:

[0016] This invention designs the filter membrane as a filter membrane cavity, allowing water to be filtered from inside the housing into the filter membrane cavity. This enables multiple filter membrane cavities to work simultaneously, resulting in high filtration efficiency and meeting the standards for recycled water.

[0017] 2. The filter membrane cavity of this utility model is cylindrical. The filter membrane cavity includes two circular mounting brackets, which are located at both ends. The filter membrane is arranged around the two circular mounting brackets. The cylindrical shape of the filter membrane cavity makes it less likely for dead corners to exist inside the filter membrane cavity. At the same time, it eliminates the need to fold the filter membrane, thus avoiding the problem of damage at the folds.

[0018] 3. The rinsing device of this utility model includes annular tube frames arranged around the filter membrane. The annular tube frames are connected by connecting pipes, which are connected to a water source. The annular tube frames are provided with multiple rinsing holes facing the filter membrane. The arrangement of multiple annular tube frames can fully cover the rinsing of the filter membrane without affecting its operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the present invention after one filter membrane has been removed.

[0022] Figure 3 This is a schematic diagram of the internal side of the present invention.

[0023] In the diagram: 1. Inlet; 2. Outlet; 3. Shell; 4. Filter membrane chamber; 5. Flushing device; 6. Waste outlet; 101. Pressure pump; 401. Filter membrane; 402. Filter membrane outlet; 403. Filter outlet pipe; 404. Circular mounting bracket. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-3 As shown, the technical solution adopted by this utility model to solve its technical problem is: a membrane filtration device for deep treatment of greywater, including a closed shell 3 with an inlet 1 and an outlet 2. The shell 3 is provided with a plurality of filter membrane cavities 4, each filter membrane cavity 4 including a filter membrane 401. The filter membrane cavity 4 has a hollow structure. The inlet 1 is connected to the shell 3. Each filter membrane cavity 4 is provided with a filter membrane outlet 402. The filter membrane outlet 402 is connected to a filter water outlet pipe 403. The filter water outlet pipe 403 is connected to the outlet 2. A rinsing device 5 is provided on the filter membrane cavity 4. The rinsing device 5 is used to rinse the filter membrane 401. The bottom of the shell 3 is provided with a waste outlet 6. A connecting pipe is connected to the inlet 1. A pressure pump 101 is provided on the connecting pipe.

[0026] In another embodiment, the filter membrane cavity 4 is cylindrical and includes two circular mounting brackets 404 at both ends. The filter membrane 401 is arranged around the two circular mounting brackets 404. The cylindrical shape of the filter membrane cavity 4 makes it less likely for dead corners to exist inside the filter membrane cavity 4, and at the same time, it is not necessary to fold the filter membrane 401, thus avoiding the problem of damage at the fold.

[0027] In another embodiment, the rinsing device 5 includes an annular tube frame surrounding the filter membrane 401. The annular tube frames are connected by connecting pipes, which are connected to a water source. A solenoid valve is provided at the connection between the water source and the connecting pipes. The annular tube frame has multiple flushing holes facing the filter membrane 401. The arrangement of multiple annular tube frames can fully cover the rinsing of the filter membrane 401 without affecting its operation.

[0028] In another embodiment, the water jet from the flushing hole forms an angle of 30-45° with the filter membrane 401, which allows a larger area of ​​the annular tube frame to flush the filter membrane 401 and a greater flushing force.

[0029] In another embodiment, the filter membrane 401 is detachably connected to the circular mounting bracket 404, which facilitates the replacement of the filter membrane 401.

[0030] In another embodiment, the housing 3 is cylindrical, and multiple filter membrane cavities 4 are evenly arranged around the inner wall of the housing 3, which makes the arrangement more reasonable and occupies a smaller area.

[0031] In another embodiment, each of the filter membranes 401 is equipped with a flow meter on its outlet pipe. A lower water level gauge is installed inside the housing 3, located at the lowest end of the lowest filter membrane cavity 4. A solenoid valve is installed at the waste outlet 6. A PLC controller is installed on the housing 3. The PLC controller is electrically connected to the lower water level gauge, the solenoid valve, and the flushing device 5, facilitating the monitoring of the filter membranes 401 through the flow meter. If the flow meter shows a flow rate lower than the normal value, it indicates that the filter membranes 401 need to be cleaned. When the PLC controller detects that the flow meter value is lower than the normal value, it stops the water intake, opens the solenoid valve to drain the water, and closes the solenoid valve when the water level reaches the lower water level. The PLC controller then opens the second solenoid valve to control the flushing device 5 to operate for cleaning. After cleaning is completed, the flushing device 5 is closed, and water continues to enter the housing 3 for further filtration.

[0032] In another embodiment, the rinsing device 5 is equipped with a timer, which is electrically connected to the PLC controller, and the timer setting can control the rinsing time each time.

[0033] In another embodiment, the pore size of the filter membrane 401 is 0.01~0.1μm.

[0034] Specific implementation process: In the specific implementation process, multiple devices of this application can be connected by pipelines to form a multi-stage filtration system. In this specific implementation, two devices of this application are connected by pipelines to form a secondary filtration system. Specifically, greywater is introduced into the housing 3 through inlet 1, which is directly connected to the housing 3, allowing the wastewater to be filtered to be directly poured into the housing 3, thus filling the housing 3 with water. A connecting pipe is provided at inlet 1, and a pressure pump 101 is installed on the connecting pipe, thereby creating positive pressure inside the housing 3, causing the greywater to be treated to enter through the filter membrane 401 from inside the housing 3. The water is filtered inside the filter membrane cavity 4, and the filtered water flows out to the outlet 2 through the filter outlet pipe, thus forming a filtration process. The treated water after filtration is discharged through the filter membrane outlet 402 and the filter pipe. Since impurities will adhere to the surface of the filter membrane 401 during the filtration process, the filtration efficiency will be affected. Therefore, a rinsing device 5 is provided on the outside of the filter membrane cavity 4. The rinsing device 5 is arranged around the outer surface of the filter membrane 401. In order to achieve better rinsing effect, the rinsing hole forms an angle of 30-45° with the filter membrane 401. When the impurities in the housing 3 accumulate to a certain amount, the waste washed off can be discharged through the waste outlet 6.

[0035] The results of physical testing of the treated water discharged after filtration in the above embodiments are as follows:

[0036] Turbidity: Stable <0.5 NTU (better than the recycled water standard ≤1 NTU);

[0037] Suspended solids (SS): Nearly 100% removed, effluent SS≈0 mg / L.

[0038] Based on the above physical test results, it can be seen that the turbidity and suspended solids of the water filtered by this application are better than the standards for recycled water, and it can be used as recycled water and can reach the Class III standard for surface water.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A membrane filtration device for advanced greywater treatment, characterized in that, The device includes a closed housing (3) with an inlet (1) and an outlet (2). The housing (3) contains multiple filter membrane chambers (4). Each filter membrane chamber (4) contains a filter membrane (401). The filter membrane chamber (4) is hollow. The inlet (1) is connected to the housing (3). Each filter membrane chamber (4) is provided with a filter membrane outlet (402). The filter membrane outlet (402) is connected to a filter membrane outlet pipe (403). The filter membrane outlet pipe (403) is connected to the outlet (2). The filter membrane chamber (4) is provided with a rinsing device (5). The rinsing device (5) is used to rinse the filter membrane (401). The bottom of the housing (3) is provided with a waste outlet (6). The inlet (1) is provided with a connecting pipe. The connecting pipe is provided with a pressure pump (101).

2. The membrane filtration device for advanced greywater treatment according to claim 1, characterized in that: The filter membrane cavity (4) is cylindrical and includes two circular mounting brackets (404). The two circular mounting brackets (404) are located at both ends of the filter membrane cavity, and the filter membrane (401) is arranged around the two circular mounting brackets (404).

3. The membrane filtration device for advanced greywater treatment according to claim 2, characterized in that: The flushing device (5) includes an annular tube frame surrounding the filter membrane (401), the annular tube frames are connected by connecting pipes, the connecting pipes are connected to a water source, a solenoid valve is provided at the connection between the water source and the connecting pipes, and the annular tube frame is provided with a plurality of flushing holes facing the filter membrane (401).

4. The membrane filtration device for advanced greywater treatment according to claim 3, characterized in that: The water jet from the flushing hole forms an angle of 30-45° with the filter membrane (401).

5. The membrane filtration device for advanced greywater treatment according to claim 2, characterized in that: The filter membrane (401) is detachably connected to the circular mounting bracket (404).

6. The membrane filtration device for advanced greywater treatment according to claim 1, characterized in that: The housing (3) is cylindrical, and multiple filter membrane cavities (4) are evenly arranged around the inner wall of the housing (3).

7. The membrane filtration device for advanced greywater treatment according to claim 1, characterized in that: Each of the filter membrane outlet pipes (403) is equipped with a flow meter. The housing (3) is equipped with a water level gauge. The water level gauge is located at the lowest end of the filter membrane cavity (4). The waste outlet (6) is equipped with a solenoid valve. The housing (3) is equipped with a PLC controller. The PLC controller is electrically connected to the water level gauge, the solenoid valve and the flushing device (5).

8. The membrane filtration device for advanced greywater treatment according to claim 7, characterized in that: The rinsing device (5) is equipped with a timer, which is connected to the PLC controller.

9. The membrane filtration device for advanced greywater treatment according to claim 1, characterized in that: The pore size of the filter membrane (401) is 0.01 to 0.1 μm.

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