Self-cleaning high-precision filtering device and system

Abstract

The utility model provides a kind of self-cleaning high-precision filtering device and system, filtering device has tank, filter cartridge is arranged in the cavity of tank, and filter cartridge is formed with clean water cavity between tank, and there is cleaning water inlet pipe in tank by support plate, cleaning water inlet pipe is connected rotatable cleaning water pipe, and cleaning water pipe side alternately sets up several layers of cleaning water branch pipe on upper and lower, and each cleaning water branch pipe end is provided with nozzle, and at least one nozzle outlet direction has angle with the diameter direction of tank;System includes electromagnetic flowmeter, pneumatic ball valve, liquid level controller, water tank, pneumatic diaphragm pump, pressure relief pneumatic valve, high-pressure cleaning pump, water inlet pneumatic valve, floating pneumatic valve, filtering device, clean water pneumatic valve, water inlet pneumatic plug valve and control box.The utility model is applicable to the purification front-end processing of multiple water quality, and filter medium can be automatically washed, filter medium can use long, and filtered impurities and solid particles can be discharged in time, and water purification treatment capacity is large.

Description

Technical Field

[0001] This utility model relates to a self-cleaning high-precision filtration device and system for purifying water sources. Background Technology

[0002] At present, most of the pretreatment of water purification in my country adopts filter bag type and multi-media, but the filter bags and multi-media need to be replaced regularly; mechanical self-cleaning filters have low filtration accuracy, and the filtration accuracy can only reach 30μm. The main problems are: (1) The filter bags need to be replaced regularly. When the solid content of the water is high, the filter bags need to be replaced very frequently, the operating cost is high, and the waste filter bags are easy to cause secondary pollution to the environment; (2) The filtration accuracy is low, which increases the treatment cost of the next stage of water purification and reduces the treatment capacity. Summary of the Invention

[0003] The purpose of this invention is to provide a self-cleaning high-precision filtration device and system, which solves the defects of existing technologies that use filter bags and have multiple media.

[0004] The purpose of this utility model is achieved in the following manner: A self-cleaning high-precision filtration device comprises a tank with a cap sealing the top opening. An inlet communicating with the inner cavity of the tank is located on the top side of the tank, and a drain port communicating with the inner cavity is located at the bottom of the tank. A filter cylinder containing high-precision media, lower than the inlet, is installed within the inner cavity of the tank, forming an annular clean water cavity between the filter cylinder and the inner wall of the tank. An outlet communicating with the clean water cavity is located on the side of the tank. A support plate is fixed to the upper part of the clean water cavity on the side wall of the inner cavity of the tank. The support plate supports a cleaning water inlet pipe connected to the outside of the tank. The cleaning water inlet pipe is sealed to a rotatable, vertically arranged cleaning water pipe. Several layers of cleaning water branch pipes are arranged alternately on the side of the cleaning water pipe, with at least one cleaning water branch pipe in each layer. When there are two or more cleaning water branch pipes in each layer, they are evenly distributed circumferentially. Each cleaning water branch pipe has a nozzle at its end, and at least one of the nozzles is a nozzle. When there are two or more nozzles with an angle between the outlet direction and the diameter direction of the tank, the inclination direction of these nozzles is the same. The outlet direction of other nozzles is in the diameter direction of the tank. When the nozzles with an angle between the outlet direction and the diameter direction of the tank are used, the water flow has a reaction force on the nozzle when the water is sprayed out of the nozzle. The nozzle pushes the cleaning water branch pipe, which drives the cleaning water pipe to rotate. The cleaning water branch pipe and the nozzle on the cleaning water branch pipe rotate with it. The nozzle rotates circumferentially to rinse the inner surface of the filter cartridge. The rinsing water sprayed from the nozzle is in the shape of an inverted cone. It is best if the water sprayed from the nozzles on the upper and lower cleaning water branch pipes can overlap in height. This utility model uses a filter cartridge with high-precision media to improve the filtration accuracy. However, since high-precision media is relatively easy to clog, an active rinsing device is used to solve this problem, so as to achieve the purpose of high-precision filtration without clogging the media.

[0005] The number of cleaning water branch pipes on each layer is 2-4, depending on the inner diameter of the filter cartridge. The function of the cleaning water branch pipe is to support the nozzle in a position away from the center of the tank and close to the filter cartridge, and to lead the water from the cleaning water pipe into the nozzle. The cleaning water branch pipe can be a straight pipe, a bend, or other shapes, and it is not required that the center line of the cleaning water branch pipe be in a horizontal or vertical plane.

[0006] In a series of cleaning water branch pipes, the nozzle outlets on all the cleaning water branch pipes in one layer are at an angle to the diameter of the tank.

[0007] The angle between the nozzle outlet direction and the diameter direction of the tank is 90°-150°. This angle refers to the angle between the nozzle outlet direction and the section of the diameter closest to the center point of the tank circumference.

[0008] An inlet pressure transmitter is installed on the side of the inlet, and an outlet pressure transmitter is installed on the side of the outlet, to detect the pressure of the water to be purified in the tank and the pressure of the purified water produced.

[0009] The cleaning water pipe is supported at its lower part by a lower support body that can rotate relative to it. The lower support body is fixed to the inner wall of the tank and supports the lower part of the cleaning water pipe to prevent it from shaking when rotating.

[0010] An exhaust port connected to the inner cavity of the tank is provided on the top side of the tank body. This is used to expel the air inside the tank body when water is added, in case of initial use or after maintenance if there is air inside the tank body.

[0011] Water to be purified enters the inner cavity of the tank through the inlet, is filtered and purified by the filter cartridge, and then enters the clean water chamber. The purified water flows out through the outlet. The pressure of the water to be purified entering the tank is monitored in real time by the pressure transmitter at the inlet, and the pressure of the clean water in the clean water chamber is monitored in real time by the pressure transmitter at the outlet. When the pressure difference between the clean water and the water to be purified in the tank is large, the cleaning system is activated to flush the filter cartridge. The cleaning water supplied by the cleaning water inlet pipe passes through the cleaning water pipe and the cleaning water branch pipe and is sprayed out from the nozzle. When the nozzle sprays water at an angle to the diameter of the tank, it pushes the cleaning water pipe to rotate, thereby rotating all the nozzles. The cleaning water sprayed from the nozzle rotates and flushes the inner surface of the filter cartridge. When there is a lot of sediment in the tank, it is discharged through the drain port at the bottom of the tank.

[0012] The water purification system employs a self-cleaning high-precision filtration device. It consists of a water tank equipped with a level controller for detecting high and low water levels. A water inlet pipe for the water to be purified is connected to one side of the top of the tank, and an electromagnetic flow meter and a pneumatic ball valve are connected in series to this inlet pipe. The system also includes a filtration device, with a water pipe for the water to be purified connected to the inlet of the filtration device and the bottom of the tank. A manual ball valve, a pneumatic diaphragm pump, and an inlet pneumatic valve are connected in series to this water pipe. A pressure relief pneumatic valve is connected to the pressure relief port of the filtration device. A cleaning water pipeline connects the bottom of the tank to the cleaning water inlet pipe of the filtration device. A manual ball valve, a high-pressure cleaning pump, and an inlet air vent valve are connected in series in the water pipeline. A clean water discharge pipe is connected to the outlet of the filter device, and a clean water pneumatic valve is connected in series on the clean water discharge pipe. A drain pipe is connected to the drain outlet of the filter device, and a floating pneumatic valve is connected in series on the drain pipe. A control box is also provided, with control lines corresponding to the electromagnetic flow meter, pneumatic ball valve, level controller, inlet pneumatic valve, inlet pressure transmitter on the inlet, outlet pressure transmitter on the outlet, and clean water pneumatic valve. The control box also has electrical wires for connecting to the pneumatic diaphragm pump and the high-pressure cleaning pump.

[0013] The water to be purified enters the water tank through the water source inlet pipe, an electromagnetic flow meter, and a pneumatic ball valve. The electromagnetic flow meter measures the flow to calculate the treated water volume. The pneumatic ball valve is the inlet control valve on the water source inlet pipe. When the water level in the tank is at the low level detected by the level controller, the pneumatic ball valve opens to fill the tank. When the water level reaches the high level detected by the level controller, the level controller sends a signal to the control box, which then sends a control signal to the pneumatic ball valve to close it, stopping the water from filling the tank. The level controller maintains the water level in the tank between low and high levels. A manual ball valve, a pneumatic diaphragm pump, and an inlet pneumatic valve are connected in series on the water pipe connecting the filter inlet to the bottom of the tank. The manual ball valve is mainly used for maintenance and is normally open. The control box opens the inlet pneumatic valve, activating the pneumatic diaphragm pump to draw the water to be purified from the tank into the filter's interior. The inlet pressure transmitter detects the inlet pressure. The purified water... Water is discharged through a pneumatic valve and a clean water discharge pipe. The pneumatic valve is controlled by the control box. Upon initial use or after maintenance, air may be present in the tank cavity. This air is released through the exhaust port via a pressure relief pneumatic valve controlled by the controller. A pressure transmitter is installed at the outlet of the filter unit to monitor the pressure of the clean water in the chamber in real time. When the pressure difference between the clean water and the inlet pressure transmitter is significant, the filter cartridge needs to be flushed. A cleaning water pipeline connects the bottom of the tank to the filter unit's cleaning water inlet pipe, and a manual ball valve, a high-pressure cleaning pump, and an inlet vent valve are connected in series in this pipeline. The manual ball valve is normally open and closed during maintenance. The control box activates the high-pressure cleaning pump, which draws water into the cleaning water inlet pipe and flushes the filter cartridge through the filter unit's nozzles. The inlet vent valve is used to expel air from the water. When there are many impurities at the bottom of the filter unit, the floating pneumatic valve opens, and the impurities are discharged through the drain pipe.

[0014] The tank material of this utility model can be 304 stainless steel, with a cylindrical body and end caps at the top and bottom. The filter cartridge can be made of nanofiber material, with a filtration accuracy >0.3μm particles and an interception rate ≥99%. Pressure transmitters are installed at the inlet and outlet of the filter device to determine the clogging status of the filter media based on the pressure difference data, thus achieving automatic cleaning. Based on the data detected by the set pressure sensor, the drain valve is controlled to discharge the filtered solid particles and impurities. For different water qualities, set parameters are selected, and the computer in the control box controls the timely discharge of filtered impurities and solid particles, and automatically cleans the filter media without damaging it during the cleaning process. The filter media can be reused for a long time, reducing the secondary pollution of the environment caused by water purification consumables and solid waste.

[0015] The beneficial effects of this utility model are: it is suitable for pretreatment of various water qualities, the filter media can be automatically flushed, thus allowing the use of filter media with high filtration accuracy without clogging, the filter media has a long service life, and the filtered impurities and solid particles can be discharged in a timely manner; it has a large water purification capacity and low operating cost. Attached Figure Description

[0016] Figure 1 This is a front view of the filtration device of this utility model; Figure 2 yes Figure 1 Sectional view along axis AA; Figure 3 It is a three-dimensional diagram of the rinsing device; Figure 4 This is the front view of the rinsing device; Figure 5 This is a schematic diagram of the overall filtration system.

[0017] In the diagram: 1-Tank body; 2-Cleaning water inlet pipe; 3-Tank cap; 4-Exhaust port; 5-Inlet; 6-Inlet pressure transmitter; 7-Drain outlet; 8-Outlet; 9-Outlet pressure transmitter; 10-Filter cartridge; 11-Clean water chamber; 12-Support plate; 13-Cleaning water pipe; 14-Cleaning water branch pipe; 15-Nozzle; 16-Lower support body; 21-Inlet pipe for water source requiring purification; 22-Electromagnetic flow meter; 23-Pneumatic ball valve; 24-Level controller; 25-Water tank; 26-Manual ball valve; 27-Pneumatic diaphragm pump; 28-Pressure relief pneumatic valve; 29-High-pressure cleaning pump; 30-Inlet pneumatic valve; 31-Drain pipe; 32-Floating pneumatic valve; 33-Filter device; 34-Clean water discharge pipe; 35-Clean water pneumatic valve; 36-Inlet vent valve; 37-Control box. Detailed Implementation

[0018] Reference Figures 1-4The self-cleaning high-precision filtration device comprises a tank 1, with a cap 3 sealing the upper opening of the tank 1. A water inlet 5, communicating with the inner cavity of the tank 1, is located on the top side of the tank 1. An exhaust port 4, also communicating with the inner cavity of the tank 1, is located on the top of the tank 1. A drain port 7, communicating with the inner cavity of the tank 1, is located at the bottom of the tank 1. A filter cartridge 10, containing high-precision media, is installed inside the tank 1, below the water inlet 5. The filter cartridge 10 forms an annular structure with the inner wall of the tank 1. A water purification chamber 11 has an outlet 8 on the side of the tank body 1 that communicates with the water purification chamber 11. A support plate 12 is fixed on the inner wall of the tank body 1 at the upper part of the water purification chamber 11. The support plate 12 supports a cleaning water inlet pipe 2 connected to the outside of the tank body 1. The cleaning water inlet pipe 2 is sealed to a rotatable, vertically arranged cleaning water pipe 13. The connection between the cleaning water inlet pipe 2 and the cleaning water pipe 13 is a rotary joint, such as the water inlet joint at the top of a well drill pipe. Several layers of cleaning water branch pipes 14 are arranged alternately on the side of the tank 1, depending on the height of the tank body 1. Each layer of cleaning water branch pipes 14 has two cleaning water branch pipes 14 and they are on the same straight line. The ends of the two cleaning water branch pipes 14 in one layer are connected to nozzles 15 through right-angle elbows. The two nozzles 15 are rotationally symmetrical to facilitate the formation of rotational thrust in the same direction. The ends of the remaining cleaning water branch pipes 14 are directly connected to nozzles 15. All nozzles 15 have the same shape, and the water outlet of the nozzle 15 is located at its center. The water sprayed from the nozzles 15 on the upper and lower layers of cleaning water branch pipes 14 can overlap each other in height. An inlet pressure transmitter 6 is provided on the side of the inlet 5, and an outlet pressure transmitter 9 is provided on the side of the outlet 8. A lower support body 16 that can rotate relative to the cleaning water pipe 13 is provided at the lower part of the cleaning water pipe 13. The lower support body 16 is fixed on the inner wall of the tank body 1 and provides support for the lower part of the cleaning water pipe 13.

[0019] The water to be purified enters the inner cavity of the tank 1, and after being purified by the filter cartridge 10, it enters the clean water chamber 11. The purified water flows out through the outlet 8. The air at the top of the tank 1 is discharged through the exhaust port 4. The outlet pressure transmitter 9 detects the pressure of the clean water in the clean water chamber 11. When the pressure difference between the clean water and the water to be purified is large, the flushing device consisting of the cleaning water inlet pipe 2, the support plate 12, the cleaning water pipe 13, the cleaning water branch pipe 14, the nozzle 15 and the lower support body 16 is activated. The nozzle 15 rotates around the cleaning water pipe 13 to flush the filter cartridge 10. When there is a lot of sediment in the tank 1, it is discharged through the drain port 7 at the bottom of the tank 1.

[0020] Reference Figure 5The overall water purification system includes a water tank 25, equipped with a level controller 24 for detecting high and low water levels. A water inlet pipe 21 for the water to be purified is connected to one side of the top of the water tank 25. An electromagnetic flow meter 22 and a pneumatic ball valve 23 are connected in series to the water inlet pipe 21. There is also a filter device 33. A water pipe for the water to be purified is connected between the inlet of the filter device 33 and the bottom of the water tank 25. A manual ball valve 26, a pneumatic diaphragm pump 27, and an inlet pneumatic valve 30 are connected in series to the water pipe for the water to be purified. A pressure relief pneumatic valve 28 is connected to the vent of the filter device 33. A cleaning water pipeline connects the bottom of the water tank 25 to the cleaning water inlet pipe of the filter device 33, and a manual ball valve is connected in series in the cleaning water pipeline. 26. High-pressure cleaning pump 29; inlet air vent valve 36; a clean water discharge pipe 34 is connected to the outlet of the filter device 33, and a clean water pneumatic valve 35 is connected in series on the clean water discharge pipe 34; a drain pipe 31 is connected to the drain outlet of the filter device 33, and a floating pneumatic valve 32 is connected in series on the drain pipe 31; a control box 37 is also provided, and the control box 37 is provided with control lines corresponding to the electromagnetic flow meter 22, pneumatic ball valve 23, liquid level controller 24, inlet pneumatic valve 30, inlet pressure transmitter 6 on inlet 5, outlet pressure transmitter 9 on outlet 8, and clean water pneumatic valve 35. The control box 37 is also provided with electrical wires connected to the pneumatic diaphragm pump 27 and the high-pressure cleaning pump 29.

[0021] The water to be purified enters the water tank 25 through the water source inlet pipe 21, electromagnetic flow meter 22, and pneumatic ball valve 23. Electromagnetic flow meter 22 measures the water volume, pneumatic ball valve 23 controls the water inlet, and level controller 24 controls the water level in the tank 25. The water to be purified is pumped from the tank 25 to the filter device 33 via manual ball valve 26, pneumatic diaphragm pump 27, and inlet pneumatic valve 30 on the water pipe. Inlet pressure transmitter 6 detects the inlet pressure. The purified water is discharged through clean water pneumatic valve 35 and clean water outlet pipe 34. The pressure transmitter 9 monitors the pressure of the purified water in real time. When the pressure difference between the purified water and the water pressure in the tank is large, the filter cartridge of the filter device 33 is flushed. The manual ball valve in the cleaning water pipeline is normally open. The high-pressure cleaning pump 29 is started, and the high-pressure cleaning pump 29 draws water into the cleaning water inlet pipe. The filter cartridge of the filter device 33 is flushed through the nozzle of the filter device 33. The air vent valve 30 at the inlet is used to discharge air from the water. When there are many impurities at the bottom of the filter device 33, the floating pneumatic valve 32 is opened, and the impurities are discharged through the drain pipe.

Claims

1. A self-cleaning high-precision filtration device, comprising a tank, a cap sealing the upper opening of the tank, a water inlet communicating with the inner cavity of the tank at the top side of the tank, and a drain outlet communicating with the inner cavity at the bottom of the tank, characterized in that: A filter cylinder (10) for high-precision media, lower than the inlet (5), is installed in the inner cavity of the tank (1). An annular clean water cavity (11) is formed between the filter cylinder (10) and the inner wall of the tank (1). An outlet (8) communicating with the clean water cavity (11) is provided on the side of the tank (1). A support plate (12) is fixed on the side wall of the inner cavity of the tank (1) above the clean water cavity (11). The support plate (12) supports a cleaning water inlet pipe (2) connected to the outside of the tank (1). The cleaning water inlet pipe (2) is sealed to a rotatable, vertically arranged cleaning water pipe (13). The sides of the cleaning water pipe (13) are alternately arranged vertically. Several layers of cleaning water branch pipes (14) are provided, each layer of cleaning water branch pipes (14) has at least one, and when the number of each layer of cleaning water branch pipes (14) is two or more, they are evenly distributed in the circumferential direction. Each cleaning water branch pipe (14) is provided with a nozzle (15) at its end. At least one of the nozzles (15) has an outlet direction that is at an angle to the diameter direction of the tank (1). When there are two or more nozzles (15) that are at an angle to the diameter direction of the tank (1), the tilting direction of such nozzles (15) is the same, and the outlet direction of the other nozzles (15) is in the diameter direction of the tank (1).

2. The self-cleaning high-precision filtration device according to claim 1, characterized in that: The number of cleaning water branch pipes (14) on each floor is 2-4.

3. The self-cleaning high-precision filtration device according to claim 1 or 2, characterized in that: In a series of cleaning water branch pipes (14), the nozzles (15) on all the cleaning water branch pipes (14) of one layer have an angle with the diameter direction of the tank (1).

4. The self-cleaning high-precision filtration device according to claim 3, characterized in that: The angle between the outlet direction of the nozzle (15) and the diameter direction of the tank (1) is 90°-150°.

5. The self-cleaning high-precision filtration device according to claim 1, characterized in that: An inlet pressure transmitter (6) is installed on the side of the inlet (5), and an outlet pressure transmitter (9) is installed on the side of the outlet (8).

6. The self-cleaning high-precision filtration device according to claim 1, characterized in that: The lower part of the cleaning water pipe (13) is supported by a lower support body (16) that can rotate relative to it, and the lower support body (16) is fixed on the inner wall of the tank (1).

7. The self-cleaning high-precision filtration device according to claim 1, characterized in that: An exhaust port (4) communicating with the inner cavity of the tank is provided on the top side of the tank.

8. A system comprising the self-cleaning high-precision filtration device as described in claim 1, characterized in that: There is a water tank (25), and a level controller (24) for detecting high and low water levels is installed on the water tank (25). A water source inlet pipe (21) to be purified is connected to the top side of the water tank (25). An electromagnetic flow meter (22) and a pneumatic ball valve (23) are connected in series on the water source inlet pipe (21). There is also a filter device (33). A water pipe to be purified is connected between the inlet of the filter device (33) and the bottom of the water tank (25). A manual ball valve (26), a pneumatic diaphragm pump (27) and an inlet pneumatic valve (30) are connected in series on the water pipe to be purified. A pressure relief pneumatic valve (28) is connected to the exhaust port of the filter device (33). A cleaning water pipeline is connected between the bottom of the water tank (25) and the cleaning water inlet pipe of the filter device (33). A manual ball valve (26) and a high-pressure cleaning pump (24) are connected in series in the cleaning water pipeline. 29) Inlet air valve (36); a clean water discharge pipe (34) is connected to the outlet of the filter device (33), and a clean water pneumatic valve (35) is connected in series on the clean water discharge pipe (34); a drain pipe (31) is connected to the drain outlet of the filter device (33), and a floating pneumatic valve (32) is connected in series on the drain pipe (31); a control box (37) is also provided, and the control box (37) is provided with control lines corresponding to the electromagnetic flow meter (22), pneumatic ball valve (23), liquid level controller (24), inlet pneumatic valve (30), inlet pressure transmitter (6) on inlet (5), outlet pressure transmitter (9) on outlet (8), and clean water pneumatic valve (35). The control box (37) is also provided with electrical wires connected to the pneumatic diaphragm pump (27) and high pressure cleaning pump (29).

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