Intelligent clean pre-coating film precision filtration system based on dynamic pressure regulation

Abstract

The application relates to a smart clean pre-coating film precision filtration system based on dynamic pressure regulation, and belongs to the technical field of filters. The system comprises a filter body and a material adding tank. The filter body comprises a water inlet channel and a water outlet channel. The material adding tank comprises a water inlet pipe and a water outlet pipe. The material adding tank is connected with the water inlet channel through the water inlet pipe and the water outlet pipe in parallel through valves. A water pump is arranged in the water inlet channel. The material adding tank is a hollow cylinder. The water inlet pipe extends into the material adding tank. One end of the water inlet pipe in the material adding tank is a spiral generating pipe. The spiral generating pipe is arranged at the bottom edge of the material adding tank. A point, which is closest to the spiral generating pipe and is located at the bottom edge of the material adding tank, is a reference point. The included angle between the spiral generating pipe and the tangent line of the bottom surface of the spiral pipe at the reference point is 5-20 DEG. Compared with the prior art, the application increases the pretreatment of filter material and improves the mixing uniformity.

Description

Technical Field

[0001] This invention belongs to the field of filter technology, specifically relating to a smart pre-coated membrane fine filtration system based on dynamic pressure regulation. Background Technology

[0002] Pre-coated membrane filters are mainly drawn into the tank by negative air pressure or by mixed powder and liquid. At the same time, the filter media used for filtration is added into the filter once and repeatedly forms a filter membrane by adhering to the substrate, and then the filtration is completed through the filter membrane.

[0003] A typical filter, 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 in sequence, 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 in sequence. 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 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] However, in the above solutions, factors such as different gaps between the substrates and uneven distribution of the filter media in the water can lead to poor uniformity of the filter membrane thickness. Poor uniformity of the filter membrane thickness can result in inconsistent filtration rates at different points on the filter membrane, which in turn makes it difficult to control the filtration effect. It is necessary to improve the mixing uniformity of the filter media in advance, that is, to mix the filter media and water more evenly to avoid the problem of uneven filter membrane thickness. For this purpose, a smart pre-coated membrane fine filtration system based on dynamic pressure regulation is needed to pre-treat the filter media and improve the mixing uniformity. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, this invention provides a smart pre-coated membrane fine filtration system based on dynamic pressure regulation, which features pretreatment of the filter material and improved mixing uniformity.

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

[0007] A smart pre-coated membrane fine filtration system based on dynamic pressure regulation includes a filter body 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 valves. A water pump is installed in the inlet channel.

[0008] The filling tank is a hollow cylinder. The water inlet pipe extends into the filling tank. One end of the water inlet pipe inside the filling tank is a spiral generating pipe. The spiral generating pipe is located at the bottom edge of the filling tank. The point on the bottom edge of the filling tank closest to the spiral generating pipe is taken as the reference point. The angle between the spiral generating pipe and the tangent of the bottom surface of the spiral pipe located at the reference point is 5~20°.

[0009] As a preferred embodiment of the present invention, the filling tank includes a filling cover, which is hinged to the upper edge of the filling tank and forms the top of the filling tank.

[0010] As a preferred embodiment of the present invention, it further includes a control module. A differential pressure sensor is installed inside the filter body, and a pressure regulating module electrically connected to the control module is installed at the water inlet pipe. The pressure regulating module is used to regulate the water pressure entering the filling tank under the command of the control module. The differential pressure sensor is electrically connected to the control module and is used to monitor the pressure difference of the filter body and upload the pressure difference data to the control module. The control module determines whether the pressure difference data exceeds a threshold and increases the water pressure when the determination result is yes.

[0011] As a preferred embodiment of the present invention, the differential pressure sensor is used to monitor the pressure difference of the filter body and upload the pressure difference Pc data to the control module. The control module is used to instruct the pressure regulating module to increase the inlet pressure of the inlet pipe by A1 times, where A1=Pc / Pc0×d, and d is a pre-input constant.

[0012] As a preferred embodiment of the present invention, the inlet pipe is equipped with a flow rate sensor, which is electrically connected to the control module. The flow rate sensor is used to monitor the flow rate of the filter body and upload the flow rate data to the control module. The control module is used to calculate the comprehensive adhesion coefficient based on the flow rate data and pressure difference data, and reduce the pump frequency when the adhesion coefficient exceeds a threshold.

[0013] As a preferred embodiment of the present invention, the flow rate sensor is used to monitor the flow rate of the filter body and upload the flow rate data L to the control module. The control module is used to calculate the comprehensive adhesion coefficient Z=(k1×L / L0+k2×P / P0)×(k1+k2) based on the flow rate data and pressure difference data P, and reduce the pump frequency when the adhesion coefficient exceeds the threshold, where k1 and k2 are pre-input constants, and L0 and P0 are pre-input reference values.

[0014] As a preferred embodiment of the present invention, the flow velocity sensor is used to detect the flow velocity at various points within the filter body and upload several flow velocity data to the control module. The control module is used to calculate the variance of several flow velocity data and determine whether the variance is greater than a threshold. When the variance is greater than the threshold, the control module increases the pump frequency.

[0015] As a preferred embodiment of the present invention, it also includes a control panel, which is used to display the flow rates at various locations and to input the values ​​of k1, k2, L0 and P0.

[0016] The beneficial effects of this invention are as follows:

[0017] (1) By setting up a feeding tank in parallel in the water inlet channel of the filter body, and making the angle between the spiral generating tube of the feeding tank and the tangent of the bottom surface of the spiral tube located at the reference point 5~20°, the structure of stirring water flow is automatically formed, realizing the pretreatment of filter material in the feeding tank, improving the mixing uniformity, mixing filter material and water more evenly, and avoiding uneven filter membrane thickness caused by uneven mixing.

[0018] (2) By setting a differential pressure sensor to monitor the pressure difference of the filter body, and when the control module determines that the pressure difference data exceeds the threshold, the water pressure entering the feeding tank is increased to complete the automatic adjustment of the feeding tank filtration rate, so that the filter material forms a filter layer with uniform particle size according to the requirements.

[0019] (3) The flow rate of the filter body is monitored by setting a flow rate sensor, and the comprehensive adhesion coefficient is calculated based on the flow rate data and pressure difference data. When the adhesion coefficient exceeds the threshold, the pump frequency is reduced, and when the adhesion is poor, the filter material is better attached to the base layer.

[0020] (4) By using the control module to calculate the variance of several flow rate data and increasing the pump frequency when the variance is greater than the threshold, the filter layer is corrected for unevenness, and the flow rate is temporarily increased to flush the weak area. Attached Figure Description

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of the feeding tank of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the feeding tank of the present invention;

[0024] Figure 3 This is the waterway diagram for the present invention.

[0025] In the diagram: 1. Feeding tank; 11. Inlet pipe; 12. Outlet pipe; 111. Spiral generating pipe; 2. Filter body; 21. Inlet channel; 22. Outlet channel; 23. Drain outlet; 3. Water pump. Detailed Implementation

[0026] 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.

[0027] Please see Figures 1-3 A smart pre-coated membrane fine filtration system based on dynamic pressure regulation includes a filter body 2 and a feeding tank 1. The filter body 2 includes an inlet channel 21 and an outlet channel 22. The feeding tank 1 includes an inlet pipe 11 and an outlet pipe 12. The feeding tank 1 is connected in parallel with the inlet channel 21 through the inlet pipe 11 and the outlet pipe 12 via valves.

[0028] In this scheme, the filling filter material is diatomaceous earth or perlite. The filter body 2 is equipped with a filter module. The filter body 2 is a hollow cylinder. The filter module is used to carry the pre-coated membrane. The filter module divides the filter body 2 into two parts, hereinafter referred to as the first part and the second part. Since the filter module divides the filter body 2 into two parts, the water entering the filter body 2 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.

[0029] 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 body 2. The support plate has several through holes. Each through hole has a filter column at its lower periphery. 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.

[0030] 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 channel 21 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 channel 22.

[0031] The feeding tank 1 is a hollow cylinder. The water inlet pipe 11 extends into the feeding tank 1. One end of the water inlet pipe 11 inside the feeding tank 1 is a spiral generating pipe 111. The spiral generating pipe 111 is located at the bottom edge of the feeding tank 1. The point on the bottom edge of the feeding tank 1 closest to the spiral generating pipe 111 is taken as the reference point. The angle between the spiral generating pipe 111 and the tangent of the bottom surface of the spiral pipe located at the reference point is 5~20°.

[0032] When water flows from the inlet pipe 11 through the spiral generating pipe 111 and enters the feed tank 1 parallel to the tangent of the reference point, the water flow automatically forms a vortex and automatically constitutes a stirring water flow. At this time, the filter material put into the feed tank 1 can be mixed evenly by the water flow.

[0033] During operation, the water pump 3 installed in the water inlet channel 21 is responsible for continuously pumping water into the filter body 2. At the same time, it also includes a drain outlet connected to the filter body. The drain outlet is connected to the municipal drainage system to discharge wastewater into the municipal drainage system.

[0034] By setting the feed tank 1 in parallel with the water inlet channel 21 of the filter body 2, and making the angle between the spiral generating tube 111 of the feed tank 1 and the tangent of the bottom surface of the spiral tube located at the reference point 5~20°, the structure of stirring water flow is automatically formed, so as to realize the pretreatment of filter media in the feed tank 1, improve the mixing uniformity, mix the filter media and water more evenly, and avoid the uneven thickness of filter membrane caused by uneven mixing.

[0035] Specifically, to facilitate the addition of filter material to the filling tank 1, the filling tank 1 includes a filling cover, which is hinged to the upper edge of the filling tank 1 and forms the top of the filling tank 1;

[0036] When filter media needs to be added, the operator opens the filling cover and puts the filter media in. The filter media is automatically mixed evenly under the stirring of the water flow.

[0037] During water circulation, automatic monitoring of water pressure difference is required. For this purpose, a control module is also included. A differential pressure sensor is installed inside the filter body 2, and a pressure regulating module electrically connected to the control module is installed at the water inlet pipe 11. The pressure regulating module is used to regulate the water pressure entering the feed tank 1 under the command of the control module. The differential pressure sensor is electrically connected to the control module and is used to monitor the pressure of the first part and the second part of the filtered module in the filter body 2 respectively, calculate the pressure difference between the two parts as the differential pressure data, and upload the differential pressure data to the control module. The control module determines whether the differential pressure data exceeds the threshold and increases the water pressure when the determination result is yes.

[0038] In the process of monitoring the pressure difference of the filter body 2, specifically, the differential pressure sensor is used to monitor the pressure difference of the filter body 2 and upload the pressure difference Pc data to the control module. The control module is used to instruct the pressure regulating module to increase the inlet pressure of the inlet pipe 11 by A1 times, where A1=Pc / Pc0×d, and d is a pre-input constant.

[0039] Assuming the differential pressure sensor detects the pressure in the first part of the filter body 2 as P1 and the pressure in the second part as P2, the value of Pc is obtained by calculating the value of |P1-P2|.

[0040] When the pressure difference is large, it means that there is a probability of filter media blockage in the feeding tank 1. The main reason for the filter media blockage is that the filter media particles are too large and block the filter body 2. The reason for the excessively large particles is that the mixing is not sufficient. At this time, it is necessary to increase the inlet water pressure and increase the flow rate of the mixing water to improve the mixing effect. At this time, A1=Pc / Pc0×d increases with the increase of the pressure difference Pc, thus completing the increase of the inlet water pressure.

[0041] By setting a differential pressure sensor to monitor the pressure difference of the filter body 2, and when the control module determines that the pressure difference data exceeds the threshold, it increases the water pressure entering the feeding tank 1 to complete the automatic adjustment of the feeding tank filtration rate, so that the filter material forms a filter layer with uniform particle size according to the requirements.

[0042] When the water flow is large, the adhesion is low, and the inlet pressure needs to be adjusted according to the water flow. For example, when the adhesion is poor, the frequency of the water pump 3 is reduced so that the filter media can better adhere to the base layer of the filter body 2. For this purpose, the inlet pipe 11 is equipped with a flow rate sensor, which is electrically connected to the control module. The flow rate sensor is used to monitor the flow rate of the filter body 2 and upload the flow rate data to the control module. The control module is used to calculate the comprehensive adhesion coefficient based on the flow rate data and pressure difference data, and reduce the frequency of the water pump 3 when the adhesion coefficient exceeds the threshold.

[0043] Specifically, the flow rate sensor is used to monitor the flow rate of the filter body 2 and upload the flow rate data L to the control module. The control module is used to calculate the comprehensive adhesion coefficient Z=(k1×L / L0+k2×P / P0)×(k1+k2) based on the flow rate data and pressure difference data P, and reduce the frequency of the water pump 3 when the adhesion coefficient exceeds the threshold. Here, k1 and k2 are pre-input constants, and L0 and P0 are pre-input reference values.

[0044] The flow rate of the filter body 2 is monitored by setting a flow rate sensor, and the comprehensive adhesion coefficient is calculated based on the flow rate data and pressure difference data. When the adhesion coefficient exceeds the threshold, the frequency of the water pump 3 is reduced, so that the filter material can adhere better to the base layer when the adhesion is poor.

[0045] The flow velocity sensor is used to detect the flow velocity at various points inside the filter body 2 and upload several flow velocity data to the control module. The control module is used to calculate the variance of several flow velocity data and determine whether the variance is greater than a threshold. If the variance is greater than the threshold, the control module increases the frequency of the water pump 3.

[0046] By using the control module to calculate the variance of several flow velocity data, and increasing the frequency of pump 3 when the variance is greater than the threshold, the correction of uneven filter layer is completed, and the flow velocity is temporarily increased to flush the weak area.

[0047] It also includes a control panel, which displays the flow rates at various points and allows input of values ​​for k1, k2, L0, and P0.

[0048] 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 smart clean pre-coat membrane polishing system based on dynamic pressure regulation, characterized in that: The filter body comprises a water inlet channel and a water outlet channel, and the additive tank comprises a water inlet pipe and a water outlet pipe, the additive tank is connected with the water inlet channel through the water inlet pipe and the water outlet pipe by a valve, and a water pump is arranged in the water inlet channel; The additive tank is a hollow cylinder, the water inlet pipe extends into the additive tank, one end of the water inlet pipe in the additive tank is a spiral generating pipe, the spiral generating pipe is arranged at the edge of the bottom of the additive tank, a reference point is arranged at the edge of the bottom of the additive tank closest to the spiral generating pipe, and the included angle between the spiral generating pipe and the tangent of the bottom surface of the additive tank at the reference point is 5-20°. The control module is further arranged, a differential pressure sensor is arranged in the filter body, a pressure adjusting module electrically connected with the control module is arranged at the water inlet pipe, the pressure adjusting module is used for adjusting the water pressure entering the additive tank under the instruction of the control module, the filter body comprises a filter module, the differential pressure sensor is electrically connected with the control module, the filter module divides the filter body into two parts, the differential pressure sensor is used for monitoring the pressure of the two parts in the filter body respectively, calculating the difference between the pressures of the two parts as pressure difference data, and uploading the pressure difference data to the control module, the control module judges whether the pressure difference data exceeds a threshold value, and increases the water pressure of the water inlet pipe entering the additive tank when the judgment result is yes. After the differential pressure sensor uploads the pressure difference data Pc to the control module, the control module is used for instructing the pressure adjusting module to increase the water pressure of the water inlet pipe by A1 times, wherein A1=Pc / Pc0×d, d is a constant input in advance. The water inlet pipe is provided with a flow rate sensor, the flow rate sensor is electrically connected with the control module, the flow rate sensor is used for monitoring the flow rate of the filter body and uploading flow rate data to the control module, and the control module is used for calculating a comprehensive adhesion coefficient according to the flow rate data and the pressure difference data, and reducing the frequency of the water pump when the adhesion coefficient exceeds a threshold value. The flow rate sensor is used for monitoring the flow rate of the filter body and uploading flow rate data L to the control module, the control module is used for calculating a comprehensive adhesion coefficient Z=(k1×L / L0+k2×Pc / Pc0)×(k1+k2) according to the flow rate data and the pressure difference data Pc, and reducing the frequency of the water pump when the adhesion coefficient exceeds a threshold value, wherein k1 and k2 are constants input in advance, and L0 and Pc0 are reference values input in advance. The flow rate sensor is used for detecting the flow rates at different positions in the filter body and uploading several flow rate data to the control module, the control module is used for calculating the variance of the several flow rate data and judging whether the variance is greater than a threshold value, and the control module increases the frequency of the water pump when the variance is greater than the threshold value.

2. The intelligent pre-coat membrane filtration system based on dynamic pressure regulation according to claim 1, characterized in that: The additive tank comprises an additive cover, the additive cover is hinged with the upper edge of the additive tank and constitutes the top of the additive tank.

3. The intelligent pre-coat membrane filtration system based on dynamic pressure regulation according to claim 2, characterized in that: The control panel is further arranged, the control panel is used for displaying the flow rates at different positions and inputting the values of k1, k2, L0 and Pc0.

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