Backwashing ultrafiltration filtering device

Abstract

The utility model relates to the technical field of water purification, in particular to a backwashing ultrafiltration filtering device, which comprises a shell, a first water passing port, a second water passing port and a backwashing port, comprising a cylinder body and an ultrafiltration membrane coated on the cylinder body; a water passing cavity is formed between the outer surface of the ultrafiltration membrane filter cartridge and the interior of the shell; a first electromagnetic valve is arranged at one end of the first water passing pipe; a second electromagnetic valve is arranged at one end of the backwashing water outlet pipe; a fourth electromagnetic valve is arranged at one end of the backwashing pipe; a third electromagnetic valve is arranged at a water inlet of the second water passing pipe; a fifth electromagnetic valve is arranged at a water outlet of the second water passing pipe; and the third water passing pipe is positioned between the backwashing pipe and the fifth electromagnetic valve, so that the backwashing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, in particular to a backwashing ultrafiltration filtering device. Background Art

[0002] Ultrafiltration is a highly efficient membrane separation technology used to remove suspended solids, bacteria, viruses and some macromolecular organic matter from water. It uses an ultrafiltration membrane to filter liquids, allowing water molecules and small molecules to pass through while intercepting larger molecules and particulate matter. The ultrafiltration process is physical and does not involve chemical reactions, so it does not change the chemical properties of water.

[0003] During long-term use, the ultrafiltration membrane is prone to attachment and clogging of suspended solids such as silt and other macromolecular substances due to the small gap between the filter membranes. These pollutants will gradually accumulate on the membrane surface or clog the membrane pores, causing the membrane flux to decrease, affecting the system's filtration efficiency, and may even increase operating costs. This requires backwashing of the ultrafiltration membrane to remove impurities attached to the ultrafiltration membrane, prevent the membrane from being clogged by impurities and pollutants, and thus extend the service life of the membrane.

[0004] Chinese patent publication number: CN213995014U discloses a filter, specifically a backwash filter. It is characterized in that it includes a vertically arranged cylindrical shell, the upper part of the side wall of the cylindrical shell has a water inlet, the water inlet has a first valve, the lower part of the side wall of the cylindrical shell has a water outlet, and the water outlet has a second valve. A tubular filter element is concentrically arranged in the cylindrical shell, the lower end of the filter element is fixed to the bottom of the shell, the side wall of the filter element is mesh-shaped, and the upper edge of the filter element is located above the water outlet and below the water inlet; there is a sealing ring plate around the upper edge of the filter element and the inner side wall of the shell, the outer circumferential surface of the sealing ring plate is fixedly sealed with the inner side wall of the shell, and the inner circumferential surface of the sealing ring plate is fixedly sealed with the outer side wall of the filter element. There is a high-pressure water inlet on the side wall of the shell below the sealing ring plate, and there is a third valve on the high-pressure water inlet. It can be seen that in the technical solution, the direction of water flow when flushing the filter element is the same as the direction of water flow when the filter element is filtering, and it is not easy to flush out impurities and pollutants, and the cleaning effect is not significant. Utility Model Content

[0005] To this end, the utility model provides a backwashing ultrafiltration device to overcome the problem in the prior art that the direction of water flow when flushing the filter element is the same as the direction of water flow when the filter element is filtering, which makes it difficult to flush out impurities and pollutants and the cleaning effect is not significant.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a backwashing ultrafiltration device, comprising:

[0007] A shell, the shell is in the shape of a column extending up and down, and a first water inlet, a second water inlet and a backwashing inlet are arranged on the surface of the shell;

[0008] An ultrafiltration membrane cartridge is arranged inside the housing, comprising a cylinder and an ultrafiltration membrane coated on the cylinder, the top end of the ultrafiltration membrane cartridge is sealed against the upper end of the housing, the bottom end of the ultrafiltration membrane cartridge is sealed against the base inside the housing, and a water passage cavity is formed between the outer surface of the ultrafiltration membrane cartridge and the interior of the housing;

[0009] a first water pipe, one end of which is connected to the first water outlet, and a first solenoid valve is provided at one end of the first water pipe away from the first water outlet;

[0010] a backwash outlet pipe, one end of which is in communication with the side wall of the first water pipe, and a second solenoid valve is disposed at one end of the backwash outlet pipe away from the first water pipe;

[0011] A backwash pipe, one end of which is connected to the base, an end of the backwash pipe away from the base is connected to the side wall of the second water pipe, and a fourth solenoid valve is provided at an end of the backwash pipe close to the base;

[0012] The water inlet of the second water pipe is provided with a third solenoid valve, and the water outlet of the second water pipe is provided with a fifth solenoid valve;

[0013] A third water pipe, one end of which is connected to the bottom end of the water chamber, and one end of the third water pipe away from the water chamber is connected to the side wall of the second water pipe. The third water pipe is located between the backwash pipe and the fifth solenoid valve.

[0014] Furthermore, the first water outlet is arranged at the upper end of the shell, the first water outlet is coaxially connected to the ultrafiltration membrane cartridge, the second water outlet and the backwash outlet are arranged at the lower end of the shell, the second water outlet is connected to the base, and the backwash outlet is connected to the bottom end of the water chamber.

[0015] Furthermore, an ultrasonic generator is provided on the outer side wall of the shell.

[0016] Furthermore, the material of the ultrafiltration membrane is polyvinylidene fluoride.

[0017] Furthermore, a plurality of cleaning holes are arranged at equal angles in the base.

[0018] Furthermore, sealing rings are provided at the top end and the bottom end of the ultrafiltration membrane cartridge.

[0019] Furthermore, the inner diameter of the backwash pipe is smaller than the inner diameter of the third water pipe.

[0020] Further, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are solenoid ball valves or solenoid butterfly valves.

[0021] Furthermore, a control module is provided, and the control module is connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve respectively.

[0022] The control module controls the first solenoid valve and the fifth solenoid valve to open in response to a first preset time length, and controls the second solenoid valve, the third solenoid valve and the fourth solenoid valve to close;

[0023] In response to a second preset time period, the control module controls the first solenoid valve and the fifth solenoid valve to be closed, and controls the second solenoid valve, the third solenoid valve, and the fourth solenoid valve to be opened.

[0024] Furthermore, the control module is connected to the ultrasonic generator, and within the second preset time period, the control module controls the ultrasonic generator to turn on and run for a third preset time period, wherein the third preset time period is shorter than the second preset time period.

[0025] Compared with the prior art, the beneficial effect of the utility model lies in that, during the backwashing stage, the utility model controls the second solenoid valve, the third solenoid valve and the fourth solenoid valve to be opened and the other solenoid valves to be closed through the control module, thereby realizing precise control of the backwashing duration and water consumption, and through the cooperation of the backwashing pipe, the second water pipe and the third water pipe, the backwash water can not only directly flush the inside of the filter cartridge, but also flush the ultrafiltration membrane from the outside to the inside through the second water port, thereby realizing reverse flushing; at the same time, the control module turns on the ultrasonic generator to further loosen and peel off impurities on the ultrafiltration membrane, thereby improving the backwashing effect.

[0026] Furthermore, the utility model arranges the first water outlet at the upper end of the shell, the first water outlet is coaxially connected with the ultrafiltration membrane cartridge, the second water outlet and the backwash outlet are arranged at the lower end of the shell, the second water outlet is connected with the base, and the backwash outlet is connected with the bottom end of the water chamber, so that the water flow direction in the backwash stage is opposite to the water flow direction in the water filtration stage, effectively removing impurities and pollutants attached to the filter membrane, and improving the backwash efficiency.

[0027] Furthermore, the outer side wall of the shell of the utility model is provided with an ultrasonic generator, thereby optimizing the backwashing performance.

[0028] Furthermore, the utility model sets the material of the ultrafiltration membrane to polyvinylidene fluoride, which has high strength and good toughness, and reduces the breakage rate of the ultrafiltration membrane, thereby improving the economy of the backwashing ultrafiltration device.

[0029] Furthermore, a plurality of cleaning holes are arranged at equal angles in the base of the utility model, so that the backwash water can evenly clean the surface of the ultrafiltration membrane, thereby improving the cleaning effect.

[0030] Furthermore, the utility model sets the diameter of the backwash pipe to be smaller than the diameter of the third water pipe. The smaller backwash pipe diameter can produce a higher water flow velocity, thereby enhancing the scouring force on the surface of the ultrafiltration membrane, thereby ensuring effective cleaning of the ultrafiltration membrane.

[0031] Furthermore, the control module of the utility model is respectively connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve, and is in a closed state in response to a first preset time length, and is in a closed state in response to a second preset time length, and is capable of automatically controlling the opening and closing of the valves according to the preset time length, thereby realizing automated operation.

[0032] Furthermore, sealing rings are provided at the top and bottom of the filter membrane cartridge of the utility model, thereby enhancing the sealing performance of the device and avoiding water leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic cross-sectional structure diagram of a backwash ultrafiltration device according to an embodiment of the utility model;

[0034] Figure 2 This is a circuit connection diagram of the backwash ultrafiltration device of the utility model embodiment;

[0035] Figure 3 A top view of a cleaning hole of a backwash ultrafiltration device according to an embodiment of the utility model;

[0036] In the figure, 1, shell; 101, first water outlet; 102, second water outlet; 103, backwash outlet; 104, base; 1041, cleaning hole; 105, water chamber; 201, cylinder; 202, ultrafiltration membrane; 203, sealing ring; 3, first water pipe; 4, backwash outlet pipe; 5, backwash pipe; 6, second water pipe; 601, water inlet of second water pipe; 602, water outlet of second water pipe; 7, third water pipe; 8, ultrasonic generator; 9, first solenoid valve; 10, second solenoid valve; 11, fourth solenoid valve; 12, third solenoid valve; 13, fifth solenoid valve. DETAILED DESCRIPTION

[0037] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model are described clearly and completely. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the utility model.

[0039] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0041] See also Figure 1-3 , which are respectively a schematic cross-sectional structure diagram of the backwashing ultrafiltration filtering device of an embodiment of the utility model; a schematic circuit connection diagram of the backwashing ultrafiltration filtering device of an embodiment of the utility model; and a top view of the cleaning hole of the backwashing ultrafiltration filtering device of an embodiment of the utility model.

[0042] An embodiment of the present invention provides a backwashing ultrafiltration device, comprising:

[0043] The shell 1 is in the shape of a column extending up and down, and a first water inlet 101, a second water inlet 102 and a backwash inlet 103 are provided on the surface of the shell 1;

[0044] An ultrafiltration membrane cartridge is arranged inside the housing 1, comprising a barrel 201 and an ultrafiltration membrane 202 coated on the barrel 201, wherein the top end of the ultrafiltration membrane 202 cartridge is sealed against the upper end of the housing 1, and the bottom end of the ultrafiltration membrane cartridge is sealed against the base 104 inside the housing 1, and a water passage cavity 105 is formed between the outer surface of the ultrafiltration membrane cartridge and the interior of the housing 1;

[0045] A first water pipe 3, one end of which is connected to the first water port 101, and a first solenoid valve 9 is provided at one end of the first water pipe 3 away from the first water port 101;

[0046] A backwash outlet pipe 4, one end of which is connected to the side wall of the first water pipe 3, and a second solenoid valve 10 is provided at one end of the backwash outlet pipe 4 away from the first water pipe 3;

[0047] A backwash pipe 5, one end of which is connected to the base 104, an end of the backwash pipe 5 away from the base 104 is connected to the side wall of the second water pipe 6, and a fourth solenoid valve 11 is provided at the end of the backwash pipe 5 close to the base 104;

[0048] The water inlet of the second water pipe 6 is provided with a third solenoid valve 12, and the water outlet of the second water pipe 6 is provided with a fifth solenoid valve 13;

[0049] The third water pipe 7 has one end connected to the bottom end of the water chamber 105 , and one end of the third water pipe 7 away from the water chamber 105 is connected to the side wall of the second water pipe 6 . The third water pipe 7 is located between the backwash pipe 5 and the fifth solenoid valve 13 .

[0050] Specifically, the first water outlet 101 is arranged at the upper end of the shell 1, and the first water outlet 101 is coaxially connected to the ultrafiltration membrane cartridge, the second water outlet 102 and the backwash outlet 103 are arranged at the lower end of the shell 1, the second water outlet 102 is connected to the base 104, and the backwash outlet 103 is connected to the bottom end of the water chamber 105.

[0051] It can be understood that the cylinder 201 is a cylindrical frame for supporting the ultrafiltration membrane 202 .

[0052] Specifically, an ultrasonic generator 8 is disposed on the outer side wall of the shell 1 .

[0053] Specifically, the material of the ultrafiltration membrane 202 is polyvinylidene fluoride.

[0054] Specifically, a plurality of cleaning holes 1041 are arranged at equal angles in the base 104 for uniformly cleaning the ultrafiltration membrane 202 .

[0055] Specifically, a sealing ring 203 is provided at the top end and the bottom end of the ultrafiltration membrane cartridge.

[0056] Specifically, the inner diameter of the backwash pipe 5 is smaller than the inner diameter of the third water pipe 7 .

[0057] Specifically, the first solenoid valve 9 , the second solenoid valve 10 , the third solenoid valve 12 , the fourth solenoid valve 11 and the fifth solenoid valve 13 are solenoid ball valves or solenoid butterfly valves.

[0058] Specifically, a control module is also provided, such as a PLC or a chip with a program set, and the control module is respectively connected to the first solenoid valve 9, the second solenoid valve 10, the third solenoid valve 12, the fourth solenoid valve 11 and the fifth solenoid valve 13,

[0059] The control module controls the first solenoid valve 9 and the fifth solenoid valve 13 to open in response to a first preset time, and controls the second solenoid valve 10, the third solenoid valve 12 and the fourth solenoid valve 11 to close;

[0060] The control module controls the first solenoid valve 9 and the fifth solenoid valve 13 to close in response to a second preset time length, and controls the second solenoid valve 10, the third solenoid valve 12 and the fourth solenoid valve 11 to open. The second preset time length represents the cleaning operation time of the backwashing ultrafiltration device stopping water filtration and then performing the backwashing stage after the first preset time length is completed.

[0061] Specifically, the control module is connected to the ultrasonic generator 8, and within the second preset time period, the control module controls the ultrasonic generator 8 to turn on and run for a third preset time period, wherein the third preset time period is shorter than the second preset time period.

[0062] The working process of the utility model is as follows: within a first preset time length, the control module controls the first solenoid valve 9 and the fifth solenoid valve 13 to open and the other solenoid valves to be in a closed state, so that the liquid to be filtered flows into the ultrafiltration membrane cartridge through the first water pipe 3, and the impurities in the liquid are removed by the ultrafiltration membrane 202. The filtered clean water passes through the water chamber 105 between the ultrafiltration membrane cartridge and the shell 1, and finally flows out through the water outlet of the second water pipe 6 controlled by the fifth solenoid valve 13, completing the water filtration stage; within a second preset time length, the control module controls the second solenoid valve 10, the third solenoid valve 12 and the fourth solenoid valve 11 to open and the other solenoid valves to be in a closed state, and the backwash water passes through the second water pipe 6, a part of it reversely flushes the inside of the ultrafiltration membrane cartridge through the backwash pipe 5, and the other part reversely flushes into the water chamber 105 through the third water pipe 7 and then cleans the ultrafiltration membrane 202 from the outside to the inside, and all the backwash water finally flows out from the backwash outlet pipe 4 controlled by the second solenoid valve 10.

[0063] The backwash water in this embodiment can be clean water or chlorine-containing ultrafiltered water, and there is no specific limitation as long as it meets the cleaning requirements.

[0064] For those skilled in the art, according to the concept of the embodiments of the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A backwash ultrafiltration device, characterized in that: include: A shell, the shell is in the shape of a column extending up and down, and a first water inlet, a second water inlet and a backwashing inlet are arranged on the surface of the shell; An ultrafiltration membrane cartridge is arranged inside the housing, comprising a cylinder and an ultrafiltration membrane coated on the cylinder, the top end of the ultrafiltration membrane cartridge is sealed against the upper end of the housing, the bottom end of the ultrafiltration membrane cartridge is sealed against the base inside the housing, and a water passage cavity is formed between the outer surface of the ultrafiltration membrane cartridge and the interior of the housing; a first water pipe, one end of which is connected to the first water outlet, and a first solenoid valve is provided at one end of the first water pipe away from the first water outlet; a backwash outlet pipe, one end of which is in communication with the side wall of the first water pipe, and a second solenoid valve is disposed at one end of the backwash outlet pipe away from the first water pipe; A backwash pipe, one end of which is connected to the base, an end of the backwash pipe away from the base is connected to the side wall of the second water pipe, and a fourth solenoid valve is provided at an end of the backwash pipe close to the base; The water inlet of the second water pipe is provided with a third solenoid valve, and the water outlet of the second water pipe is provided with a fifth solenoid valve; A third water pipe, one end of which is connected to the bottom end of the water chamber, and one end of the third water pipe away from the water chamber is connected to the side wall of the second water pipe. The third water pipe is located between the backwash pipe and the fifth solenoid valve.

2. The backwash ultrafiltration device according to claim 1, characterized in that: The first water outlet is arranged at the upper end of the shell, and the first water outlet is coaxially connected to the ultrafiltration membrane cartridge. The second water outlet and the backwash outlet are arranged at the lower end of the shell, the second water outlet is connected to the base, and the backwash outlet is connected to the bottom end of the water chamber.

3. The backwash ultrafiltration device according to claim 2, characterized in that: The outer side wall of the shell is provided with an ultrasonic generator.

4. The backwash ultrafiltration device according to claim 3, characterized in that: The material of the ultrafiltration membrane is polyvinylidene fluoride.

5. The backwash ultrafiltration device according to claim 4, characterized in that: A plurality of cleaning holes are arranged at equal angles in the base.

6. The backwash ultrafiltration device according to claim 5, characterized in that: The top end and the bottom end of the ultrafiltration membrane cartridge are both provided with sealing rings.

7. The backwash ultrafiltration device according to claim 6, characterized in that: The inner diameter of the backwash pipe is smaller than the inner diameter of the third water pipe.

8. The backwashing ultrafiltration device according to claim 7, characterized in that: The first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are solenoid ball valves or solenoid butterfly valves.

9. The backwash ultrafiltration device according to claim 8, characterized in that: A control module is also provided, and the control module is connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve respectively. The control module controls the first solenoid valve and the fifth solenoid valve to open in response to a first preset time length, and controls the second solenoid valve, the third solenoid valve and the fourth solenoid valve to close; In response to a second preset time period, the control module controls the first solenoid valve and the fifth solenoid valve to be closed, and controls the second solenoid valve, the third solenoid valve, and the fourth solenoid valve to be opened.

10. The backwash ultrafiltration device according to claim 9, characterized in that: The control module is connected to the ultrasonic generator. Within the second preset time period, the control module controls the ultrasonic generator to turn on and run for a third preset time period, wherein the third preset time period is shorter than the second preset time period.

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