Microfiltration method and system for adaptively adjusting disc stacking tension

Abstract

The invention discloses a disc stacking tension self-adaptive adjustment microfiltration method and system, and the method comprises the following steps: S1, when sewage flows into a microfiltration machine body from a water inlet pipe, a turbidity meter detects the turbidity of the sewage in the water inlet pipe, and the turbidity of the sewage entering the microfiltration machine body is obtained through detection; s2, after the turbidity meter detects the turbidity of the sewage, the turbidity is sent to a rotating speed calculation module, and the rotating speed calculation module calculates the basic rotating speed required by stacking of the discs in the microfilter body corresponding to the turbidity according to the turbidity of the sewage; and S3, the rotating speed calculation module sends the calculated rotating speed required for stacking the discs to the controller. According to the present invention, the rotation speed of the stacked discs is adaptively adjusted according to the turbidity of the sewage, such that the power of the variable frequency motor can be effectively reduced so as to achieve the energy saving effect of the micro-filtration machine on the premise of maintaining the sewage filtration effect and the sewage filtration speed.

Description

Technical Field

[0001] This invention relates to the field of microfiltration technology, and more specifically, to a microfiltration method and system with adaptive adjustment of disc stacking tension. Background Technology

[0002] Disc filters, also known as stacked disc filters or disc filters, are precision filtration devices that use physical sieving principles to separate solids and liquids. Their core design concept involves stacking multiple annular filter discs with microgrooves to create a large filtration surface area, achieving highly efficient filtration within a limited space.

[0003] In disc microfiltration machines, the rotation speed of the stacked discs is not adjustable. In actual use, the motor always runs at a fixed speed regardless of the change in influent turbidity, resulting in unnecessary energy waste when treating low-turbidity wastewater. The fixed speed cannot adapt to the dynamic changes in wastewater turbidity. When the turbidity suddenly increases, the filtration speed may be too fast and may result in incomplete filtration. When the turbidity decreases, the filtration speed is too slow and affects the treatment efficiency. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention aims to provide a microfiltration method and system with adaptive adjustment of disc stacking tension, which solves the technical problems of non-adjustable disc stacking speed, unstable filtration effect, and inability to adapt to dynamic changes in wastewater turbidity in traditional disc microfilters.

[0005] To solve the above problems, the present invention adopts the following technical solution;

[0006] A microfiltration method for adaptive adjustment of disc stack tension includes the following steps:

[0007] S1. When wastewater flows into the microfilter body from the inlet pipe, the turbidity meter will detect the turbidity of the wastewater in the inlet pipe and obtain the turbidity of the wastewater entering the microfilter body.

[0008] S2. After the turbidity meter detects the turbidity of the wastewater, it will send the data to the rotation speed calculation module. The rotation speed calculation module will calculate the basic speed required for the disc stack in the microfilter body to rotate according to the turbidity of the wastewater.

[0009] S3, the rotation speed calculation module will send the calculated rotation speed required for the disc stack to the controller. The controller will drive the disc stack to rotate by controlling the variable frequency motor through the frequency converter according to the base speed.

[0010] S4. The rotation speed of the stacked discs will adapt to the turbidity of the wastewater.

[0011] S5. The faster the discs rotate, the greater the tension of the disc stack, and the greater the amount of water filtered per unit time, making it more suitable for wastewater with lower turbidity.

[0012] S6. The slower the disc stack rotation speed, the lower the tension of the disc stack, and the smaller the amount of water filtered per unit time, which is more suitable for sewage with high turbidity.

[0013] S7. During the sewage treatment process, pressure transmitter one and pressure transmitter two will detect the water pressure in the inlet pipe and outlet pipe respectively, and send the detected pressure values ​​to the differential pressure calculation module.

[0014] S8, the differential pressure calculation module will calculate the difference between the pressures detected by the two transmitters and send the difference data to the speed regulation module;

[0015] S9. The speed adjustment module analyzes the blockage of the disc stack based on the difference. The smaller the difference, the lower the degree of blockage of the disc stack, and vice versa.

[0016] S10. When the difference data is less than the set minimum threshold, the speed adjustment module will send a signal to the controller to reduce the speed of the variable frequency motor. The controller can fine-tune the basic speed of the disc stack through the frequency converter. By reducing the speed of the disc stack, the energy consumption of the variable frequency motor can be reduced while ensuring the stability of the filtered water volume per unit time.

[0017] This solution also provides a microfiltration system with adaptive adjustment of disc stacking tension, including a microfilter body. The left and right sides of the microfilter body are respectively connected to an outlet pipe and an inlet pipe. An automatic flushing system is installed on the top of the microfilter body. A variable frequency motor for driving the disc stacking rotation is fixedly connected to the left side of the microfilter body. A controller is installed on the front of the microfilter body, and the controller integrates a speed calculation module. A turbidity meter is fixedly installed on the outside of the inlet pipe, with its probe located inside the inlet pipe. The output of the turbidity meter is connected to the speed calculation module. A frequency converter is fixedly connected to the left side of the microfilter body, and the output of the speed calculation module is connected to the controller. The controller controls the speed of the variable frequency motor through the frequency converter. A speed auxiliary adjustment system is provided on the microfilter body.

[0018] As a further description of the above technical solution:

[0019] The speed auxiliary regulation system includes pressure transmitter one and pressure transmitter two, which are fixedly installed on the inlet pipe and outlet pipe, respectively. The controller integrates a differential pressure calculation module and a speed regulation module. The output terminals of pressure transmitter one and pressure transmitter two are both connected to the differential pressure calculation module. The output terminal of the differential pressure calculation module is connected to the speed regulation module. The output terminal of the speed regulation module is connected to the controller.

[0020] As a further description of the above technical solution:

[0021] The output signal of the differential pressure calculation module is connected to the differential pressure early warning module, and the output signal of the differential pressure early warning module is connected to the controller. The controller controls the opening and closing of the automatic flushing system.

[0022] As a further description of the above technical solution:

[0023] An electric push rod is fixedly connected to the back of the water inlet pipe. A lifting plate is fixedly connected to the telescopic end of the electric push rod. A rotating rod is rotatably connected to the top of the lifting plate. The top end of the rotating rod passes through and extends into the interior of the water inlet pipe. A U-shaped block is fixedly connected to the top end of the rotating rod. A brush is fixedly connected to the inner side of the U-shaped block. A servo motor is fixedly connected to the bottom of the lifting plate. The output end of the servo motor passes through the lifting plate and is fixedly connected to the rotating rod.

[0024] As a further description of the above technical solution:

[0025] The bottom of the water inlet pipe is fixedly connected to two conduits that communicate with it. Each of the two conduits is equipped with a solenoid valve one, and the water inlet pipe is equipped with two solenoid valves two.

[0026] Compared with the prior art, the advantages of this invention are:

[0027] This solution adaptively adjusts the rotation speed of the disc stack based on the turbidity of the wastewater. While maintaining the filtration effect and speed, it can effectively reduce the power of the variable frequency motor, achieving energy saving for the microfilter. It can also clean the disc stack immediately when blockage occurs, maintaining the filtration effect while preventing disc damage. Furthermore, it can clean and maintain the turbidity meter used to detect wastewater turbidity, ensuring the quality of wastewater turbidity detection and thus improving the accuracy of subsequent disc stack speed control. Attached Figure Description

[0028] Figure 1 This is one of the perspective views of the present invention;

[0029] Figure 2 This is a second perspective view of the present invention;

[0030] Figure 3 This is a third perspective view of the present invention;

[0031] Figure 4 This is the fourth perspective view of the present invention;

[0032] Figure 5 This is a schematic diagram of the present invention;

[0033] Figure 6 This is a schematic diagram of the speed auxiliary adjustment system in this invention;

[0034] Figure 7 This is a partial cross-sectional view of the water inlet pipe in this invention.

[0035] Explanation of the labels in the diagram:

[0036] 1. Microfiltration unit body; 2. Outlet pipe; 3. Inlet pipe; 4. Solenoid valve one; 5. Variable frequency motor; 6. Controller; 7. Speed ​​calculation module; 8. Turbidity meter; 9. Frequency converter; 10. Speed ​​auxiliary adjustment system; 101. Pressure transmitter one; 102. Pressure transmitter two; 103. Differential pressure calculation module; 104. Speed ​​adjustment module; 11. Differential pressure early warning module; 12. Electric push rod; 13. Lifting plate; 14. Rotating rod; 15. U-shaped block; 16. Brush; 17. Servo motor; 18. Conduit; 19. Solenoid valve two. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] Please see Figure 1-7 A microfiltration method for adaptive adjustment of disc stack tension includes the following steps:

[0039] S1. When wastewater flows into the microfilter body 1 from the inlet pipe 3, the turbidity meter 8 will detect the turbidity of the wastewater in the inlet pipe 3 and obtain the turbidity of the wastewater entering the microfilter body 1.

[0040] S2. After the turbidity meter 8 detects the turbidity of the wastewater, it will send it to the rotation speed calculation module 7. The rotation speed calculation module 7 will calculate the basic speed required for the disc stack in the corresponding turbidity microfilter body 1 to rotate according to the turbidity of the wastewater.

[0041] S3, the rotation speed calculation module 7 will send the calculated rotation speed required for the disc stack to the controller 6. The controller 6 will control the variable frequency motor 5 to drive the disc stack to rotate according to the base speed through the frequency converter 9.

[0042] S4. The rotation speed of the stacked discs will adapt to the turbidity of the wastewater.

[0043] S5. The faster the discs rotate, the greater the tension of the disc stack, and the greater the amount of water filtered per unit time, making it more suitable for wastewater with lower turbidity.

[0044] S6. The slower the disc stack rotation speed, the lower the tension of the disc stack, and the smaller the amount of water filtered per unit time, which is more suitable for sewage with high turbidity.

[0045] S7. During the sewage treatment process, pressure transmitter 101 and pressure transmitter 2102 will detect the water pressure in the inlet pipe 3 and outlet pipe 2 respectively, and send the detected pressure values ​​to the differential pressure calculation module 103.

[0046] S8. The differential pressure calculation module 103 will calculate the difference between the pressures detected by the two transmitters and send the difference data to the speed regulation module 104.

[0047] S9, the speed adjustment module 104 analyzes the blockage of the disc stack based on the difference. The smaller the difference, the lower the degree of blockage of the disc stack, and vice versa.

[0048] S10. When the difference data is less than the set minimum threshold, the speed adjustment module 104 will send a signal to the controller 6 to reduce the speed of the variable frequency motor 5. The controller 6 can fine-tune the basic speed of the disc stack through the frequency converter 9. By reducing the speed of the disc stack, the energy consumption of the variable frequency motor 5 can be reduced while ensuring the stability of the filtered water volume per unit time.

[0049] This invention also provides a microfiltration system with adaptive adjustment of disc stack tension:

[0050] The system includes a microfilter body 1, with an outlet pipe 2 and an inlet pipe 3 connected to its left and right sides, respectively. An automatic flushing system is installed on the top of the microfilter body 1. A variable frequency motor 5 for driving the disc stacking and rotation is fixedly connected to the left side of the microfilter body 1. A controller 6 is mounted on the front of the microfilter body 1, and a speed calculation module 7 is integrated inside the controller 6. A turbidity meter 8 is fixedly mounted on the outside of the inlet pipe 3, with its probe located inside the inlet pipe 3. The output of the turbidity meter 8 is connected to the speed calculation module 7. A frequency converter 9 is fixedly connected to the left side of the microfilter body 1, and the output of the speed calculation module 7 is connected to the controller 6. The controller 6 controls the frequency conversion... The device 9 controls the speed of the variable frequency motor 5. The microfilter body 1 is equipped with a speed auxiliary adjustment system 10. The speed auxiliary adjustment system 10 includes a pressure transmitter 101 and a pressure transmitter 102. The pressure transmitter 101 and the pressure transmitter 102 are respectively fixedly installed on the inlet pipe 3 and the outlet pipe 2. The controller 6 integrates a differential pressure calculation module 103 and a speed adjustment module 104. The output terminals of the pressure transmitter 101 and the pressure transmitter 102 are both connected to the differential pressure calculation module 103. The output terminal of the differential pressure calculation module 103 is connected to the speed adjustment module 104. The output terminal of the speed adjustment module 104 is connected to the controller 6.

[0051] In this invention, the disk rotation speed directly affects the stacking tension:

[0052] As the rotational speed of the stacked discs increases, the centrifugal force increases, the clamping force between the discs increases, the filtration gaps become smaller, and the corresponding amount of water filtered per unit time increases, making it suitable for filtering low-turbidity fine particles.

[0053] As the rotational speed of the stacked discs decreases, the centrifugal force decreases, the clamping force between the discs decreases, and the filtration gaps become larger. Consequently, the amount of water filtered per unit time is smaller, making it suitable for filtering high-turbidity, coarse particles.

[0054] In actual use, when sewage flows into the microfilter body 1 from the inlet pipe 3, the turbidity meter 8 will detect the turbidity of the sewage in the inlet pipe 3 and send it to the speed calculation module 7. The speed calculation module 7 will calculate the basic rotation speed required for the disc stack in the microfilter body 1 to be corresponding to the turbidity of the sewage.

[0055] The rotation speed calculation module 7 sends the calculated rotation speed required for the disc stack to the controller 6. The controller 6 then controls the variable frequency motor 5 to drive the disc stack to rotate according to the base speed via the frequency converter 9.

[0056] The rotation speed of the stacked discs will adapt to the turbidity of the wastewater.

[0057] The faster the discs rotate, the greater the tension between the discs, and the greater the amount of water filtered per unit time, making it more suitable for wastewater with low turbidity.

[0058] The slower the discs rotate, the lower the tension between the discs, resulting in a smaller volume of water filtered per unit time, making it more suitable for wastewater with higher turbidity.

[0059] During the wastewater treatment process, pressure transmitter 101 and pressure transmitter 2102 will detect the water pressure in the inlet pipe 3 and outlet pipe 2 respectively, and send the detected pressure values ​​to the differential pressure calculation module 103.

[0060] The differential pressure calculation module 103 calculates the difference between the pressures detected by the two transmitters and sends the difference data to the speed regulation module 104.

[0061] The speed adjustment module 104 analyzes the blockage of the disc stack based on the difference. The smaller the difference, the lower the degree of blockage of the disc stack, and vice versa.

[0062] When the difference data is less than the set minimum threshold, the speed adjustment module 104 will send a signal to the controller 6 to reduce the speed of the variable frequency motor 5. The controller 6 can fine-tune the basic speed of the disc stack through the frequency converter 9. By reducing the speed of the disc stack, the energy consumption of the variable frequency motor 5 can be reduced while ensuring the stability of the filtered water volume per unit time.

[0063] Among them: the output terminal of the differential pressure calculation module 103 is connected to the differential pressure early warning module 11, the output terminal of the differential pressure early warning module 11 is connected to the controller 6, and the controller 6 controls the opening and closing of the automatic flushing system.

[0064] In this invention, the difference calculated by the differential pressure calculation module 103 is sent to the differential pressure warning module 11 at the same time as it is sent to the speed adjustment module 104. When the disc stack becomes blocked, the difference received by the differential pressure warning module 11 will be greater than the threshold. At this time, the differential pressure warning module 11 will send a blockage signal to the controller 6. The controller 6 will start the automatic flushing system to backflush and clean the disc stack. Thus, when the disc stack becomes blocked, it can be cleaned immediately, improving the practicality of the device.

[0065] Turbidity meter 8 is immersed in sewage for extended periods, and its probe is prone to fouling, severely affecting the quality of sewage turbidity measurements. To address this issue, the following solution is provided:

[0066] Wherein: an electric push rod 12 is fixedly connected to the back of the water inlet pipe 3, a lifting plate 13 is fixedly connected to the telescopic end of the electric push rod 12, a rotating rod 14 is rotatably connected to the top of the lifting plate 13, the top end of the rotating rod 14 passes through and extends into the interior of the water inlet pipe 3, a U-shaped block 15 is fixedly connected to the top end of the rotating rod 14, a brush 16 is fixedly connected to the inner side of the U-shaped block 15, a servo motor 17 is fixedly connected to the bottom of the lifting plate 13, the output end of the servo motor 17 passes through the lifting plate 13 and is fixedly connected to the rotating rod 14; two conduits 18 are fixedly connected to the bottom of the water inlet pipe 3, and a solenoid valve 4 is installed on each of the two conduits 18, and two solenoid valves 19 are installed on the water inlet pipe 3.

[0067] In this invention, after the wastewater microfiltration is completed, the electric push rod 12 is activated to drive the lifting plate 13 to rise. After the lifting plate 13 rises, it will drive the U-shaped block 15 to approach the turbidity meter 8 until the brush 16 contacts the turbidity meter 8. Then, the servo motor 17 is activated to drive the U-shaped block 15 to rotate. At this time, the brush 16 will clean the turbidity meter 8. At the same time, the two solenoid valves 19 are closed and the two solenoid valves 4 are opened. One conduit 18 is connected to the cleaning liquid pipe and the other conduit 18 is connected to the wastewater pipe. The cleaning liquid flows into the inlet pipe 3 through the one conduit 18 and is discharged from the other conduit 18. During the process of the cleaning liquid flowing in the inlet pipe 3, it can rinse the turbidity meter 8, thereby improving the cleaning effect of the turbidity meter 8 probe, maintaining the subsequent use effect of the turbidity meter 8, and thus improving the practicality of the device.

[0068] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A microfiltration method with adaptive adjustment of disc stacking tension, characterized in that: Includes the following steps: S1. When the sewage flows into the microfilter body (1) from the inlet pipe (3), the turbidity meter (8) will detect the turbidity of the sewage in the inlet pipe (3) and obtain the turbidity of the sewage entering the microfilter body (1). S2. After the turbidity meter (8) detects the turbidity of the sewage, it will send it to the rotation speed calculation module (7). The rotation speed calculation module (7) will calculate the basic speed required for the disc stack in the corresponding turbidity microfilter body (1) based on the turbidity of the sewage. S3, the rotation speed calculation module (7) will send the calculated rotation speed required for the disc stack to the controller (6), and the controller (6) will control the variable frequency motor (5) to drive the disc stack to rotate according to the base speed through the frequency converter (9); S4. The rotation speed of the stacked discs will adapt to the turbidity of the wastewater. S5. The faster the discs rotate, the greater the tension of the disc stack, and the greater the amount of water filtered per unit time, making it more suitable for wastewater with lower turbidity. S6. The slower the disc stack rotation speed, the lower the tension of the disc stack, and the smaller the amount of water filtered per unit time, which is more suitable for sewage with high turbidity. S7. During the sewage treatment process, pressure transmitter 1 (101) and pressure transmitter 2 (102) will detect the water pressure in the inlet pipe (3) and outlet pipe (2) respectively, and send the detected pressure values ​​to the differential pressure calculation module (103). S8. The differential pressure calculation module (103) will calculate the difference between the pressures detected by the two transmitters and send the difference data to the speed regulation module (104). S9, the speed adjustment module (104) will analyze the blockage of the disc stack based on the size of the difference. The smaller the difference, the lower the degree of blockage of the disc stack, and vice versa. S10. When the difference data is less than the set minimum threshold, the speed adjustment module (104) will send a signal to the controller (6) to reduce the speed of the variable frequency motor (5). The controller (6) can fine-tune the basic speed of the disc stack through the frequency converter (9). By reducing the speed of the disc stack, the energy consumption of the variable frequency motor (5) can be reduced while ensuring the stability of the filtered water volume per unit time.

2. A microfiltration system with adaptive adjustment of disc stacking tension, used to perform the microfiltration method with adaptive adjustment of disc stacking tension as described in claim 1, characterized in that: The microfilter body (1) is connected to a water outlet pipe (2) and a water inlet pipe (3) on its left and right sides respectively. An automatic flushing system is provided on the top of the microfilter body (1). A variable frequency motor (5) for driving the disc stacking and rotation is fixedly connected to the left side of the microfilter body (1). A controller (6) is installed on the front of the microfilter body (1). A speed calculation module (7) is integrated inside the controller (6). A turbidity meter (8) is fixedly installed on the outside of the water inlet pipe (3). The probe of the turbidity meter (8) is located inside the water inlet pipe (3). The output end of the turbidity meter (8) is connected to the speed calculation module (7) via a signal. A frequency converter (9) is fixedly connected to the left side of the microfilter body (1). The output end of the speed calculation module (7) is connected to the controller (6) via a signal. The controller (6) controls the speed of the variable frequency motor (5) through the frequency converter (9). A speed auxiliary adjustment system (10) is provided on the microfilter body (1).

3. The microfiltration method and system for adaptive adjustment of disc stacking tension according to claim 2, characterized in that: The speed auxiliary adjustment system (10) includes a pressure transmitter one (101) and a pressure transmitter two (102). The pressure transmitter one (101) and the pressure transmitter two (102) are respectively fixedly installed on the water inlet pipe (3) and the water outlet pipe (2). The controller (6) integrates a differential pressure calculation module (103) and a speed adjustment module (104). The output terminals of the pressure transmitter one (101) and the pressure transmitter two (102) are both connected to the differential pressure calculation module (103). The output terminal of the differential pressure calculation module (103) is connected to the speed adjustment module (104). The output terminal of the speed adjustment module (104) is connected to the controller (6).

4. The microfiltration method and system for adaptive adjustment of disc stacking tension according to claim 3, characterized in that: The output of the differential pressure calculation module (103) is connected to the differential pressure early warning module (11), and the output of the differential pressure early warning module (11) is connected to the controller (6). The controller (6) controls the opening and closing of the automatic flushing system.

5. The microfiltration method and system for adaptive adjustment of disc stacking tension according to claim 1, characterized in that: An electric push rod (12) is fixedly connected to the back of the water inlet pipe (3). A lifting plate (13) is fixedly connected to the telescopic end of the electric push rod (12). A rotating rod (14) is rotatably connected to the top of the lifting plate (13). The top end of the rotating rod (14) passes through and extends into the interior of the water inlet pipe (3). A U-shaped block (15) is fixedly connected to the top end of the rotating rod (14). A brush (16) is fixedly connected to the inner side of the U-shaped block (15). A servo motor (17) is fixedly connected to the bottom of the lifting plate (13). The output end of the servo motor (17) passes through the lifting plate (13) and is fixedly connected to the rotating rod (14).

6. The microfiltration method and system for adaptive adjustment of disc stacking tension according to claim 1, characterized in that: The bottom of the water inlet pipe (3) is fixedly connected to two conduits (18) that communicate with it. Solenoid valve 1 (4) is installed on both conduits (18), and solenoid valve 2 (19) is installed on the water inlet pipe (3).

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