A particle uniform mixing device and its control method for a smart pre-coated membrane fine filtration system

Abstract

This invention relates to a particle uniform mixing device and its control method for a smart pre-coated membrane fine filtration system, belonging to the field of water purifier technology. It includes a filter body, a control module, and a feeding tank. The filter body includes an inlet channel and an outlet channel. The feeding tank includes an inlet pipe and an outlet pipe. The feeding tank is connected in parallel with the inlet channel via the inlet and outlet pipes through valves. A water pump is installed in the inlet channel. The control module is electrically connected to the water pump and controls its power. The feeding tank is a hollow cylinder. The inlet pipe extends into the feeding tank, with one end of the inlet pipe located at the bottom edge of the feeding tank. A vortex generator is installed inside the feeding tank to generate vortex flow in the liquid within the tank.

Description

Technical Field

[0001] This invention belongs to the field of water purifier technology, specifically relating to a particle uniform mixing device and its control method for a smart pre-coated membrane fine filtration system. Background Technology

[0002] A pre-coated membrane water purification system refers to a filter cartridge that is pre-set with a perforated substrate for carrying the filter media. The filter media (such as diatomaceous earth) is put into a circulating water path connected to the filter cartridge. Water flows through the perforated substrate under the drive of the circulating water path, carrying the filter media to the substrate, where it is intercepted and adhered to the substrate surface, thus forming a pre-coating layer formed by the filter media on the substrate surface.

[0003] A common approach, such as the pre-coated membrane filter with a particle support layer disclosed in Chinese patent CN118420007A, includes a particle support layer and a pre-coated membrane layer. The particle support layer is laid flat between the filter inlet and filter outlet of the tank. The pre-coated membrane layer is laid flat on the particle support layer and located on the side closer to the filter inlet. The regeneration port is located on the side of the particle support layer away from the pre-coated membrane layer. The filter medium can pass through the pre-coated membrane layer and the particle support layer sequentially, and the regeneration medium enters the tank through the regeneration port and can pass through the particle support layer and the pre-coated membrane layer sequentially. This pre-coated membrane filter allows the regeneration medium to pass through the particle support layer and the pre-coated membrane layer from bottom to top and directly act on the impurity layer formed on the surface of the pre-coated membrane, forming an impact burst on the impurity layer from the inside out. It also causes relative movement and friction between the particles in the particle support layer, effectively removing grease and impurities attached to the particles, realizing the regeneration of the pre-coated membrane layer, and solving the problem of impurity clogging.

[0004] As can be seen, the substrate, or the carrier surface used to support the pre-coated membrane, is the core structure of the filter used to support the filter media to form the filter membrane. Due to processing errors and other reasons, the pore size at different locations on the carrier surface may vary, resulting in different pre-coated membrane thicknesses at different locations on the carrier surface and poor filtration uniformity. Alternatively, due to different water flow rates at different locations within the filter element, the amount of filter media carried to the carrier surface per unit time may vary, resulting in different pre-coated membrane thicknesses at different locations on the carrier surface and poor filtration uniformity. Poor filtration uniformity leads to difficulty in controlling the filtration effect. Therefore, a particle uniform mixing device and its control method for a smart pre-coated membrane fine filtration system with good filtration uniformity are needed. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides a particle uniform mixing device and its control method for a smart pre-coated membrane fine filtration system, which features good filtration uniformity.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A smart pre-coated membrane fine filtration system particle uniform mixing device includes a filter body, a control module, and a feeding tank. The filter body includes an inlet channel and an outlet channel. The feeding tank includes an inlet pipe and an outlet pipe. The feeding tank is connected in parallel with the inlet channel through the inlet pipe and the outlet pipe via valves. A water pump is installed in the inlet channel. The control module is electrically connected to the water pump and controls the power of the water pump.

[0008] The filling tank is a hollow cylinder. The water inlet pipe extends into the filling tank. One end of the water inlet pipe is located at the bottom edge of the filling tank. A vortex generator is installed inside the filling tank to generate vortex flow in the liquid inside the filling tank.

[0009] As a preferred embodiment of the present invention, the end of the water inlet pipe located inside the filling tank includes a first section and a second section that are perpendicular to each other. The first section is parallel to the axis of the filling tank, and the second section is slidably attached to the bottom of the filling tank. The second section rotates along the axis of the first section under the command of the control module.

[0010] In a preferred embodiment of the present invention, the control module is electrically connected to the cyclone generator, and the control module is used to control the power of the cyclone generator.

[0011] As a preferred technical solution of the present invention, the point closest to the bottom of the first segment at the bottom edge of the bottom surface of the feeding tank is set as the reference point, and the angle between the center line of the second segment and the tangent of the bottom surface of the feeding tank located at the reference point is denoted as the swirl angle. The control module is used to adjust the size of the swirl angle.

[0012] As a preferred embodiment of the present invention, the control module is used to control the power P and the size a of the swirl generator. The control module is preset with a standard swirl angle a0 and a standard power P0, where (P / P0)×(a / a0)=A, and A is a pre-input constant.

[0013] As a preferred embodiment of the present invention, the filter body further includes a filter element, in which a filtration module is disposed. The filtration module is used to carry the pre-coated membrane and divides the filter element into two parts. Several pairs of monitoring points are preset in the filter element, with two monitoring points in each pair located in the two parts of the filter element respectively. The control module is electrically connected to a differential pressure detection module, which is used to monitor the differential pressure between two points in each pair of monitoring points and upload several differential pressure data to the control module. The control module determines whether the variance of the several differential pressure data exceeds a threshold. When the determination result is yes, the control module increases the power of the cyclone generator.

[0014] As a preferred embodiment of the present invention, a plurality of differential pressure detection modules are used to monitor the differential pressure ΔP between two points in a plurality of pairs of monitoring points, and upload a plurality of differential pressure data ΔPn to a control module, wherein the control module calculates the variance F of the plurality of differential pressure data. ΔPn The power P of the cyclone generator and the magnitude of the cyclone angle a are controlled, where (P / P0)×(a / a0)=A×A1, A1=F ΔPn / F ΔPn 0, F ΔPn 0 represents the pre-entered variance threshold.

[0015] A control method for a particle uniform mixing device in a smart pre-coated membrane filtration system, applicable to the aforementioned particle uniform mixing device in a smart pre-coated membrane filtration system, includes the following steps:

[0016] Step 1: Connect the addition tank to the valve water circuit, so that the addition tank is connected in parallel with the water inlet channel through the inlet pipe and the outlet pipe via the valve;

[0017] Step 2: Make the water inlet pipe of the addition tank form a certain angle inside the addition tank to create a swirling flow inside the addition tank.

[0018] The beneficial effects of this invention are as follows:

[0019] (1) By setting up a vortex generator to make the liquid in the feeding tank vortex, the filter media is fully mixed before entering the filter element to form a pre-coated film, which improves the uniformity of the filter media distribution in the water, and thus improves the uniformity of the pre-coated film after it is formed.

[0020] (2) By setting one end of the water inlet pipe inside the filling tank to include a first section and a second section that are perpendicular to each other, the first section is parallel to the axis of the filling tank, the second section slides against the bottom of the filling tank, and the control module adjusts the size of the swirl angle so that the water tends to flow along the side wall of the filling tank after entering the filling tank, forming a swirl in the filling tank, which further improves the uniformity of the filter material distribution in the water, and thus improves the uniformity of the pre-coated film after formation.

[0021] (3) By using the control module to control the power P and the size of the swirling angle a of the swirling generator, the control module is preset with a standard swirling angle a0 and a standard power P0, where (P / P0)×(a / a0)=A, where A is a pre-input constant, so that the size of the swirling angle and the power of the swirling generator are inversely proportional. When the power of the swirling generator is large, it avoids the second section from being too far towards the edge, resulting in excessive swirling and larger filter media being concentrated at the edge under strong centrifugal force, leading to uneven distribution of filter media in the water. At the same time, when the power of the swirling generator is small and the swirling intensity is low, the second section is used to compensate for the swirling intensity, improving the coordination between the two structures of the swirling generator and the rotatable second section.

[0022] (4) By setting a differential pressure detection module, the differential pressure between corresponding points on both sides of the substrate is detected, and the control module increases the power of the cyclone generator when the variance is large, so as to further increase the cyclone intensity when the uniformity is poor, screen the filter material with smaller particles, and ensure uniformity. Attached Figure Description

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a block diagram of the control loop of the present invention;

[0025] Figure 2 The feeding tank of the present invention

[0026] In the diagram: 1. Feeding tank; 11. Water inlet channel; 12. Water outlet channel; 111. Second section. Detailed Implementation

[0027] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0028] Please see Figures 1-2 A smart pre-coated membrane fine filtration system particle uniform mixing device includes a filter body, a control module and a feeding tank 1. The filter body includes an inlet channel 11 and an outlet channel 12. The feeding tank 1 includes an inlet pipe and an outlet pipe. The feeding tank 1 is connected in parallel with the inlet channel 11 through the inlet pipe and the outlet pipe via a valve. A water pump is installed in the inlet channel 11. The control module is electrically connected to the water pump and controls the power of the water pump.

[0029] In this embodiment, a water pump is installed in the water inlet channel 11 to drive the water in the circulating water circuit formed by the water inlet channel 11, the filter body and the water outlet channel 12 to flow continuously, enter the filter body and flow out. During the process of water flowing through the water inlet channel 11, water continuously enters the water inlet pipe connected in parallel with the water inlet channel 11, flows through the feed tank 1 and then flows back into the water inlet channel 11, so as to realize the circulation driving effect of the water pump in the water inlet channel 11 on the water flow.

[0030] The filling tank 1 is a hollow cylinder. The water inlet pipe extends into the filling tank 1. One end of the water inlet pipe is located at the bottom edge of the filling tank 1. A vortex generator is installed inside the filling tank 1. The vortex generator is used to make the liquid in the filling tank 1 vortex.

[0031] The filter body also includes a filter element, which contains a filter module. The filter element body is a hollow cylinder. The filter module is used to carry the pre-coated membrane. The filter module divides the filter element into two parts, referred to as the first part and the second part. At this time, the filter module divides the filter element into two parts, so that the water entering the filter element can only enter the second part from the first part through the filter module, that is, it must pass through the filter screen formed on the filter module to complete the filtration.

[0032] In this embodiment, the filter module includes a support plate and several filter columns. The support plate is located on the upper part of the cylindrical filter element body. The support plate has several through holes. Each through hole has a filter column arranged around its lower end. The top of the filter columns is connected to the support plate. Each filter column consists of a strip filter bag and a spring for opening the strip filter bag. The upper edge of each spring is located at the lower edge of the support plate. The strip filter bag is fitted on the spring and opened by the downwardly unfolding spring to form a strip bag structure.

[0033] At this time, since the filter bag is located on the necessary path between the first part and the second part, when the water is forced into the inlet and enters the first part, it is pushed by the water pressure through the filter bag into the second part, and then flows out from the outlet.

[0034] By setting up a vortex generator to make the liquid in the feeding tank 1 swirl, the filter media is fully mixed before entering the filter element to form a pre-coated film, which improves the uniformity of the filter media distribution in the water, and thus improves the uniformity of the pre-coated film after it is formed.

[0035] To further improve the swirling intensity, the end of the water inlet pipe located inside the feeding tank 1 includes a first section and a second section 111 that are perpendicular to each other. The first section is parallel to the axis of the feeding tank 1, and the second section 111 slides against the bottom of the feeding tank 1. The second section 111 rotates along the axis of the first section under the command of the control module.

[0036] At this time, when the second segment 111 rotates to a position where the bottom of the feeding tank 1 is close to its own tangent, the water tends to flow along the side wall of the feeding tank 1 after entering the feeding tank 1, thereby assisting in the formation of the vortex.

[0037] By setting one end of the water inlet pipe inside the filling tank 1 to include a first section and a second section 111 that are perpendicular to each other, the first section is parallel to the axis of the filling tank 1, and the second section 111 is slidably attached to the bottom of the filling tank 1, and by adjusting the size of the swirl angle by the control module, the water tends to flow along the side wall of the filling tank 1 after entering the filling tank 1, forming a swirling flow inside the filling tank 1, which further improves the uniformity of the filter media distribution in the water, and thus improves the uniformity of the pre-coated film after formation.

[0038] The control module is electrically connected to the cyclone generator and is used to control the power of the cyclone generator.

[0039] Let the point closest to the bottom of the first segment of the bottom edge of the feeding tank 1 be the reference point. The angle between the center line of the second segment 111 and the tangent of the bottom surface of the feeding tank 1 located at the reference point is denoted as the vortex angle. The control module is used to adjust the size of the vortex angle.

[0040] The control module is used to control the power P and the size of the swirl angle a of the swirl generator. The control module is preset with a standard swirl angle a0 and a standard power P0, where (P / P0)×(a / a0)=A, and A is a pre-input constant.

[0041] At this point, the power P of the cyclone generator and the size of the cyclone angle α are inversely proportional.

[0042] By using the control module to control the power P of the cyclone generator and the size of the cyclone angle a, the control module is pre-set with a standard cyclone angle a0 and a standard power P0, where (P / P0)×(a / a0)=A, and A is a pre-input constant. This ensures that the size of the cyclone angle and the power of the cyclone generator are inversely proportional. When the power of the cyclone generator is high, this prevents the second section 111 from being too far towards the edge, resulting in excessively strong cyclone and larger filter media particles being concentrated at the edge under strong centrifugal force, leading to uneven distribution of filter media in the water. At the same time, when the power of the cyclone generator is low and the cyclone intensity is low, the orientation of the second section 111 compensates for the cyclone intensity, improving the coordination between the cyclone generator and the rotatable second section 111.

[0043] The filter bag, used to support the filter media to form a filter membrane, is the core structure of the filter. The surface of the filter bag that carries the pre-coated membrane is the bearing surface. Due to processing errors and other reasons, the pore size at different locations on the bearing surface may vary, resulting in different pre-coated membrane thicknesses and poor filtration uniformity. Alternatively, due to different water flow rates within the filter element, the amount of filter media carried to the filter bag per unit time may vary, leading to different pre-coated membrane thicknesses on the bearing surface and poor filtration uniformity. Poor filtration uniformity makes it difficult to control the filtration effect.

[0044] Therefore, several pairs of monitoring points are preset inside the filter element. The two monitoring points in each pair are located in the first part and the second part of the filter element, respectively. The control module is electrically connected to the differential pressure detection module. The differential pressure detection module is used to monitor the differential pressure between the two points in each pair of monitoring points and upload several differential pressure data to the control module. The control module determines whether the variance of the several differential pressure data exceeds the threshold. When the determination result is yes, the control module increases the power of the cyclone generator.

[0045] Specifically, several differential pressure detection modules are used to monitor the differential pressure ΔP between two points in several pairs of monitoring points, and upload several differential pressure data ΔPn to the control module. The control module calculates the variance F of the several differential pressure data. ΔPnThe power P of the cyclone generator and the magnitude of the cyclone angle a are controlled, where (P / P0)×(a / a0)=A×A1, A1=F ΔPn / F ΔPn 0, F ΔPn 0 represents the pre-input variance threshold, F ΔPn The variance of the differential pressure data;

[0046] When the pressure difference F of several pressure difference data ΔPn A larger value indicates a greater difference in water flow at different locations, which increases the probability of uneven thickness on the surface of the pre-coated film. In this case, it is necessary to further increase the power of the vortex generator. Since A×A1 is larger at this time, the power P in (P / P0)×(a / a0)=A×A1 has a larger upper limit of its range, thereby increasing the power.

[0047] By setting a differential pressure detection module to detect the differential pressure between corresponding points on both sides of the substrate, and by enabling the control module to increase the power of the cyclone generator when the variance is large, the cyclone intensity is further increased when the uniformity is poor, thus screening filter materials with smaller particles and ensuring uniformity.

[0048] A control method for a particle uniform mixing device in a smart pre-coated membrane filtration system, applicable to the aforementioned particle uniform mixing device in a smart pre-coated membrane filtration system, includes the following steps:

[0049] Step 1: Connect the addition tank to the valve water circuit, so that the addition tank 1 is connected in parallel with the water inlet channel 11 through the valve via the water inlet pipe and the water outlet pipe;

[0050] Step 2: Make the water inlet pipe of the addition tank form a certain angle inside the addition tank to create a swirling flow inside the addition tank.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A particle uniform mixing device for a smart pre-coated membrane fine filtration system, characterized in that: The filter includes a filter body, a control module, and a filling tank. The filter body includes an inlet channel and an outlet channel. The filling tank includes an inlet pipe and an outlet pipe. The filling tank is connected in parallel with the inlet channel through the inlet pipe and the outlet pipe via a valve. A water pump is installed in the inlet channel. The control module is electrically connected to the water pump and controls the power of the water pump. The filling tank is a hollow cylinder. The water inlet pipe extends into the filling tank. One end of the water inlet pipe is located at the bottom edge of the filling tank. A vortex generator is installed inside the filling tank. The vortex generator is used to make the liquid in the filling tank vortex. The water inlet pipe has a first section and a second section that are perpendicular to each other. The first section is parallel to the center line of the filling tank, and the second section slides against the bottom of the filling tank. The second section rotates along the center line of the first section under the command of the control module. The control module is electrically connected to the cyclone generator, and the control module is used to control the power of the cyclone generator; Let the point closest to the bottom of the first segment on the bottom edge of the filling tank be the reference point. The angle between the axis of the second segment and the tangent of the bottom surface of the filling tank located at the reference point is denoted as the swirl angle. The control module is used to adjust the size of the swirl angle. The control module is used to control the power P and the size of the swirl angle a of the swirl generator. The control module is preset with a standard swirl angle a0 and a standard power P0, where (P / P0)×(a / a0)=A, and A is a pre-input constant.

2. The particle uniform mixing device for a smart pre-coated membrane fine filtration system according to claim 1, characterized in that: The filter body also includes a filter element, in which a filtration module is provided. The filtration module is used to carry the pre-coated membrane and divides the filter element into two parts. Several pairs of monitoring points are preset in the filter element, with two monitoring points in each pair located in the two parts of the filter element respectively. The control module is electrically connected to a differential pressure detection module, which is used to monitor the pressure difference between the two points in each pair of monitoring points and upload several differential pressure data to the control module. The control module determines whether the variance of the several differential pressure data exceeds a threshold. When the determination result is yes, the control module increases the power of the cyclone generator.

3. The particle uniform mixing device for a smart pre-coated membrane fine filtration system according to claim 2, characterized in that: Several differential pressure detection modules are used to monitor the differential pressure ΔP between two points in several pairs of monitoring points, and upload several differential pressure data ΔPn to the control module. The control module calculates the variance F of the several differential pressure data. ΔPn The power P of the cyclone generator and the magnitude of the cyclone angle a are controlled, where (P / P0)×(a / a0)=A×A1, A1=F ΔPn / F ΔPn 0, F ΔPn 0 represents the pre-entered variance threshold.

4. A control method for a particle uniform mixing device in a smart pre-coated membrane fine filtration system, applicable to the particle uniform mixing device in any one of claims 2-3, comprising the following steps: Step 1: Connect the addition tank to the valve water circuit, so that the addition tank is connected in parallel with the water inlet channel through the inlet pipe and the outlet pipe via the valve; Step 2: Make the water inlet pipe of the addition tank form a certain angle inside the addition tank to create a swirling flow inside the addition tank.

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