A high-strength large-flux ultrafiltration membrane purification device

Abstract

The application relates to the technical field of water treatment and fluid separation, in particular to a high-strength large-flux ultrafiltration membrane purification device which comprises a support frame, a plurality of groups of parallel ultrafiltration membrane cylinders are arranged at the top end of the support frame, a main filter cylinder is arranged at the other end, a flux adjusting assembly and an air inlet assembly are integrated on the ultrafiltration membrane cylinder, the bottom end of the flux adjusting assembly is connected with an air pressure adjusting assembly through an adjusting valve, a spiral flow guide plate is arranged in the inner cavity of the ultrafiltration membrane cylinder, and a clean water bin which is in communication with the pipeline of the main filter cylinder is arranged at the top end of the ultrafiltration membrane cylinder. The air pressure adjusting assembly and the flux adjusting assembly are cooperatively driven to drive the air bag to deform by alternately charging and discharging air through the booster pump and the negative pressure pump, the width of the flow channel is dynamically adjusted, the water flow is reciprocating pulsed, and the backwashing dead water area is completely eliminated; the air-water combined cleaning mechanism is formed in cooperation with the air inlet assembly, the ultrafiltration membrane wire is efficiently flushed in the whole region, the strength of the aramid fiber skeleton reinforced part is improved, the pressure of the pressure relief valve is accurately controlled, the membrane flux attenuation is effectively inhibited, and the long-term stable large-flux operation of the device is ensured.

Description

Technical Field

[0001] This invention relates to the field of water treatment and fluid separation technology, specifically to a high-intensity, high-flux ultrafiltration membrane purification device. Background Technology

[0002] Ultrafiltration membrane purification devices utilize hollow fiber ultrafiltration membranes to filter through micropores under pressure, trapping impurities such as bacteria, colloids, and suspended solids in the water, allowing only water molecules and small molecules to pass through.

[0003] In existing technologies, conventional backwashing is typically used to clean the surface of ultrafiltration membrane fibers in order to maintain the filtration efficiency of the membrane module, but the following drawbacks still exist: Firstly, water with high suspended solids can easily clog membrane pores. Conventional backwash water flows along a fixed path, resulting in uneven flow field distribution and the formation of dead water zones in the internal flow channels. This makes it impossible to efficiently flush the entire ultrafiltration membrane fibers, resulting in incomplete cleaning. Secondly, the backwashing process relies solely on water pressure, resulting in insufficient water flow scouring power. The transmembrane pressure difference is prone to rise sharply, leading to a rapid decline in flux and making it difficult to maintain stable operation at high flux. Third, the internal water flow and pressure regulation capabilities are weak during backwashing, the intensity of water flow pulses and the pressure inside the cylinder are difficult to control precisely, and the sudden pressure rise can easily damage the components. In addition, there is a lack of air-water combined cleaning mechanism, making it difficult to effectively remove impurities from the surface of the ultrafiltration membrane fibers. Summary of the Invention

[0004] The purpose of this invention is to provide a high-strength, high-flux ultrafiltration membrane purification device, which achieves full-area cleaning without dead zones by adjusting the flow channel through air pressure-driven airbag deformation and cooperating with air and water backwashing, effectively preventing clogging, stabilizing the flow rate, and extending the service life.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: The present invention provides a high-strength, high-flux ultrafiltration membrane purification device, including a support frame, a plurality of ultrafiltration membrane cartridges at the top of the support frame, the plurality of ultrafiltration membrane cartridges being connected by pipes, a flux adjustment component and an air inlet component on the ultrafiltration membrane cartridges, a regulating valve at the bottom of the flux adjustment component, and a pressure regulating component connected at one end of the regulating valve through a pipe.

[0006] According to some embodiments of the present invention, the other end of the support frame is provided with two main filter cylinders, and both ends of the plurality of main filter cylinders are provided with main pipes; The other end of the support frame is also provided with a water inlet pipe. One end of the water inlet pipe is provided with multiple L-shaped pipes, and the other ends of the multiple L-shaped pipes are all connected to the water inlet of the adjacent ultrafiltration membrane cartridge.

[0007] According to some embodiments of the present invention, each of the plurality of ultrafiltration membrane cartridges is provided with a purified water chamber at its top, and the purified water chamber is provided with a water outlet at its top, and the water outlet is connected to the main filter cartridge through a pipe.

[0008] According to some embodiments of the present invention, the inner cavity of the ultrafiltration membrane cartridge is provided with a spiral guide plate. The cross-section of the spiral guide plate is hourglass-shaped with a concave center and unfolded ends. The bottom end of the spiral guide plate is a water inlet opening, and the top end is a water outlet opening. The top water outlet of the spiral guide plate is provided with multiple annular water collection covers. The top of each water collection cover is provided with multiple guide pipes arranged in an annular array, and the guide pipes are all set in an arc-shaped inclined shape. The tops of the multiple guide pipes are connected and fixed by positioning guide plates.

[0009] According to some embodiments of the present invention, the flux adjustment assembly includes a flange mounting plate disposed on the outer wall of the ultrafiltration membrane cartridge, the top end of the flange mounting plate is provided with a pressure relief valve, the bottom end of the flange mounting plate is provided with a stainless steel sleeve, the inner cavity of the stainless steel sleeve is provided with an annularly arranged air bladder, the outer wall of the air bladder is provided with an aramid fiber braided skeleton, and a PET braided tubular membrane is attached to one side of the aramid fiber braided skeleton.

[0010] According to some embodiments of the present invention, the air intake assembly includes a shell wall installed on the outer wall of the ultrafiltration membrane cartridge and multiple ultrafiltration membrane fibers located in the inner cavity of the ultrafiltration membrane cartridge. The shell wall is provided with multiple one-way air intake valves, and the other end of each of the multiple one-way air intake valves is provided with an air passage pipe. One end of the air passage pipe is inserted between the multiple ultrafiltration membrane fibers.

[0011] According to some embodiments of the present invention, the air pressure regulating assembly includes a booster pump and a negative pressure pump, both of which are located on one side of the support frame. The output end of the booster pump is provided with an air delivery pipe, and the input end of the negative pressure pump is provided with an air intake pipe. One end of both the air delivery pipe and the air intake pipe is connected to a gas pipe. The output end of the booster pump and the input end of the negative pressure pump are both connected to an adjacent regulating valve through the gas pipe, and a one-way valve is provided at one end of the air delivery pipe connected to the output end of the booster pump.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention utilizes the cooperation of a pressure regulating component and a flux regulating component, and alternately inflates and deflates the airbag using a booster pump and a negative pressure pump. This causes the spiral guide plate to deform under pressure, changing the flow channel width and making the water flow pulsate back and forth inside the ultrafiltration membrane cartridge. This effectively eliminates the dead water zone that is easily generated by traditional backwashing, and achieves efficient flushing of the entire surface of the ultrafiltration membrane fibers, solving the defects of membrane pore blockage and incomplete cleaning.

[0013] 2. This invention accelerates the water flow and enhances the scouring force by expanding the airbag and compressing the flow channel. At the same time, the one-way air intake valve of the air intake component introduces external gas into the water flow to form a bubble mixture, thus forming an air-water cleaning mechanism. This improves the water flow scouring power, effectively suppresses the sharp rise in transmembrane pressure difference, maintains the stable operation of the purification device at high throughput, and solves the problem of excessively rapid throughput decay in traditional backwashing.

[0014] 3. This invention precisely regulates the pressure inside the ultrafiltration membrane cartridge by using a pressure relief valve in the flux regulation component, avoiding excessive water flow pulse intensity that could cause a sudden pressure surge and airbag rupture. At the same time, it uses an aramid fiber woven skeleton to enhance the strength of the airbag and extend its service life. By precisely controlling the air pressure delivery through the regulating valve, it achieves precise regulation of water flow pulse and internal pressure, thus solving the technical defects of traditional devices such as weak pressure regulation and easily damaged components.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged structural diagram at point A; Figure 3 This is a schematic diagram of the ultrafiltration membrane cartridge structure of the present invention; Figure 4 This is a schematic diagram of the water collection cover and positioning guide plate of the present invention; Figure 5 This is a schematic diagram of the intake assembly structure of the present invention; Figure 6 This is a schematic diagram of the flow guide tube structure of the present invention; Figure 7 This is a schematic diagram of the one-way intake valve structure of the present invention; Figure 8 This is a cross-sectional schematic diagram of the internal structure of the stainless steel sleeve of the present invention; Figure 9 This is a schematic diagram of the spiral guide plate structure of the present invention; Figure 10 This is a schematic diagram of the airbag structure of the present invention.

[0018] In the diagram: 1. Support frame; 2. Ultrafiltration membrane cartridge; 3. Flux regulating assembly; 31. Flange mounting plate; 311. Pressure relief valve; 312. Stainless steel sleeve; 313. Airbag; 314. Aramid fiber braided skeleton; 315. PET braided membrane tube; 4. Air inlet assembly; 41. Shell wall; 411. One-way air inlet valve; 412. Vent pipe; 413. Ultrafiltration membrane fiber; 5. Regulating valve; 6. Air pressure regulating assembly 61. Booster pump; 611. Air supply pipe; 612. Check valve; 62. Negative pressure pump; 621. Suction pipe; 63. Gas pipe; 7. Main filter cartridge; 71. Main pipe; 8. Water inlet pipe; 81. L-shaped pipe; 9. Clean water tank; 91. Water outlet; 10. Spiral guide plate; 101. Water inlet opening; 102. Water outlet opening; 11. Water collection cover; 111. Guide pipe; 112. Positioning guide plate. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] like Figures 1-10 As shown, a high-strength, high-flux ultrafiltration membrane purification device includes a support frame 1. The top of the support frame 1 is provided with multiple ultrafiltration membrane cylinders 2, which are connected by pipes. The ultrafiltration membrane cylinders 2 are provided with a flux adjustment component 3 and an air inlet component 4. The bottom of the flux adjustment component 3 is provided with a regulating valve 5, and one end of the regulating valve 5 is connected to a pressure regulating component 6 through a pipe.

[0021] The support frame 1 serves as the overall load-bearing and fixing base of the device, providing stable installation support for all components and ensuring structural stability during device operation. The ultrafiltration membrane cartridge 2 is the filtration and cleaning unit of the device, internally housing ultrafiltration membrane fibers 413, and is the cavity for raw water ultrafiltration purification and backwashing of the ultrafiltration membrane fibers 413. The flux regulating component 3 is used to regulate the width and flow state of the water flow channel within the ultrafiltration membrane cartridge 2, working in conjunction with the air pressure regulating component 6 to achieve efficient full-area flushing of the ultrafiltration membrane fibers 413 and suppress membrane flux decay. The air inlet component 4 is used to introduce external gas into the ultrafiltration membrane cartridge 2, forming an air-water mixed flow to enhance the flushing and cleaning effect of the ultrafiltration membrane fibers 413. The regulating valve 5 is used for... The device precisely controls the gas pressure and flow rate supplied by the pressure regulating component 6 to the flux regulating component 3, thereby achieving precise regulation of the water flow pulse amplitude and internal pressure within the ultrafiltration membrane cartridge 2. The pressure regulating component 6 provides positive and negative pressure gas sources to the flux regulating component 3, and drives the flux regulating component 3 to operate by alternating inflation and deflation, providing the power for dynamic flushing of the ultrafiltration membrane fibers 413. Through the cooperation of the pressure regulating component 6 and the flux regulating component 3, this device can achieve efficient backwashing of the ultrafiltration membrane fibers 413 by dynamic adjustment when the ultrafiltration membrane fibers 413 become clogged or the flux decreases, solving the defects of traditional backwashing, such as the generation of dead water zones, incomplete cleaning, and excessively rapid flux decrease.

[0022] Furthermore, the other end of the support frame 1 is provided with two main filter cylinders 7, and both ends of the multiple main filter cylinders 7 are provided with main pipes 71; The other end of the support frame 1 is also provided with a water inlet pipe 8. One end of the water inlet pipe 8 is provided with multiple L-shaped pipes 81, and the other ends of the multiple L-shaped pipes 81 are all connected to the water inlet of the adjacent ultrafiltration membrane cartridge 2.

[0023] The main filter cartridge 7 is used for deep filtration of the purified water after filtration by the ultrafiltration membrane cartridge 2, further improving the quality of the effluent. Simultaneously, in backwash mode, it serves as a backwash water delivery channel, conveying backwash water back into the ultrafiltration membrane cartridge 2. The main pipeline 71 is divided into an inlet pipe and an outlet pipe. Under normal filtration conditions, it delivers the raw water to be treated and the filtered purified water; under backwash conditions, it delivers the backwash water flow, enabling switching between the filtration and backwash water paths. The inlet pipe 8 is the raw water input channel under normal filtration conditions, used to evenly distribute the raw water to be treated to each... Ultrafiltration purification is completed inside the ultrafiltration membrane cartridge 2; the L-shaped tube 81 is used to divert the raw water from the inlet pipe 8 and smoothly introduce it into the bottom inlet of each ultrafiltration membrane cartridge 2, avoiding direct impact of water flow on the ultrafiltration membrane fibers 413 and causing damage, while ensuring uniform water intake and consistent flow distribution in each ultrafiltration membrane cartridge 2; during normal filtration, the raw water enters the bottom of the ultrafiltration membrane cartridge 2 through the inlet pipe 8 and the L-shaped tube 81, and ultrafiltration purification is completed from bottom to top; in the backwash mode, the backwash water enters the ultrafiltration membrane cartridge 2 in reverse through the main pipe 71 and the main filter cartridge 7, providing a water flow path for backwashing the ultrafiltration membrane fibers 413.

[0024] Furthermore, each of the multiple ultrafiltration membrane cartridges 2 is equipped with a water purification chamber 9 at its top, and the water purification chamber 9 is equipped with a water outlet 91 at its top, which is connected to the main filter cartridge 7 through a pipe.

[0025] The water purification chamber 9 is used to collect the purified water filtered by the ultrafiltration membrane fiber 413 inside the ultrafiltration membrane cartridge 2, providing a buffer and pressure-stabilizing cavity for the filtered water to ensure a stable water flow rate. The outlet 91 is used to guide the purified water collected in the water purification chamber 9 to the main filter cartridge 7 for subsequent deep filtration. At the same time, in the backwashing mode, it serves as the inlet for backwash water, introducing backwash water into the ultrafiltration membrane cartridge 2. During normal filtration, the ultrafiltration purified water is collected in the water purification chamber 9 and transported to the main filter cartridge 7 for fine filtration through the outlet 91. In the backwashing mode, the backwash water enters the water purification chamber 9 through the main filter cartridge 7 and the outlet 91, and then enters the inner cavity of the ultrafiltration membrane cartridge 2 from top to bottom to backwash the surface of the ultrafiltration membrane fiber 413, ensuring smooth cleaning of the ultrafiltration membrane fiber 413.

[0026] Furthermore, the inner cavity of the ultrafiltration membrane cartridge 2 is provided with a spiral guide plate 10. The cross-section of the spiral guide plate 10 is hourglass-shaped with a concave center and open ends. The bottom end of the spiral guide plate 10 is the water inlet opening 101, and the top end is the water outlet opening 102. The top water outlet 102 of the spiral guide plate 10 is provided with multiple annular water collection covers 11. The top of each water collection cover 11 is provided with multiple guide pipes 111 arranged in an annular array, and the guide pipes 111 are all arranged in an arc-shaped inclined shape. The tops of the multiple guide pipes 111 are connected and fixed by positioning guide plates 112.

[0027] The spiral guide plate 10 is located in the center of the inner cavity of the ultrafiltration membrane cartridge 2. It changes the width of the water flow channel within the cavity through its own deformation, regulating the water flow velocity and flow state. This structure enables dynamic pulsed water flow and full-area flushing of the ultrafiltration membrane fibers 413. Its cross-section is hourglass-shaped, with a concave center and expanded ends. This allows for uniform changes in the channel width under pressure deformation, ensuring a stable increase in water flow velocity and preventing damage to the ultrafiltration membrane fibers 413 caused by sudden changes in local flow velocity. The inlet opening 101 is the bottom flow channel port of the spiral guide plate 10. During normal filtration, it allows raw water to enter the central flow channel of the spiral guide plate 10, and during backwashing, it allows backwash wastewater to exit the ultrafiltration membrane cartridge 2. The outlet opening 102 is the top flow channel port of the spiral guide plate 10. During normal filtration, it allows the purified water after ultrafiltration to enter the purified water chamber 9, and during backwashing, it allows the backwash water to exit the chamber. Water enters the central channel of the spiral guide plate 10; the water collection hood 11 is arranged in a ring at the water outlet 102 to uniformly collect the water flow after being guided by the spiral guide plate 10, avoid water flow deviation, ensure uniform collection of purified water during filtration, and uniform distribution of flushing water to all parts of the ultrafiltration membrane fiber 413 during backwashing; the guide pipes 111 are arranged in an arc-shaped inclined ring array to uniformly guide the water flow collected by the water collection hood 11 to the purified water chamber 9, and at the same time, uniformly disperse the backwash water to the entire cross section of the ultrafiltration membrane cartridge 2 during backwashing, avoiding local flushing blind spots and further eliminating dead water areas; the positioning guide plate 112 is used to position and fix multiple sets of guide pipes 111 to ensure the installation stability of the guide pipes 111, and at the same time plays a secondary role in uniformly guiding the water flow, further improving the uniformity of water flow distribution.

[0028] When high levels of suspended solids in the ultrafiltration membrane cartridge 2 cause membrane pore blockage and dead water zones in the flow channel, leading to a sharp increase in transmembrane pressure and a rapid decrease in flux, the inflation and deflation of the air bladder 313 can cause the spiral guide plate 10 to deform and change the width of the central water flow channel. With the water pressure remaining constant, the narrowing of the flow channel can increase the water flow velocity and enhance the scouring force. At the same time, with the alternating inflation and deflation of the booster pump 61 and the negative pressure pump 62, the spiral guide plate 10 continuously deforms and recovers, causing the water flow in the ultrafiltration membrane cartridge 2 to pulse up and down, completely eliminating the dead water zones that are easily generated by traditional backwashing. This achieves efficient scouring of the entire surface of the ultrafiltration membrane fibers 413, solving the defects of membrane pore blockage and incomplete cleaning, effectively suppressing the sharp increase in transmembrane pressure, and maintaining stable high-flux operation of the device.

[0029] Furthermore, the flux adjustment assembly 3 includes a flange mounting plate 31 disposed on the outer wall of the ultrafiltration membrane cartridge 2. The top of the flange mounting plate 31 is provided with a pressure relief valve 311, and the bottom of the flange mounting plate 31 is provided with a stainless steel sleeve 312. The inner cavity of the stainless steel sleeve 312 is provided with an annularly arranged airbag 313. The outer wall of the airbag 313 is provided with an aramid fiber braided skeleton 314. The aramid fiber braided skeleton 314 can improve the surface strength of the airbag 313 and extend the service life of the airbag 313. A PET braided tubular membrane 315 is attached to one side of the aramid fiber braided skeleton 314.

[0030] The flange mounting plate 31 serves as the connection and mounting base between the flux regulating component 3 and the ultrafiltration membrane cartridge 2, ensuring a sealed connection between them. It also provides a stable mounting point for the pressure relief valve 311 and the stainless steel sleeve 312. The pressure relief valve 311 is used to monitor and precisely regulate the pressure inside the ultrafiltration membrane cartridge 2 in real time. It automatically opens to relieve pressure when the pressure exceeds a set threshold, preventing a sudden pressure surge and rupture of the air bladder 313 due to excessive water flow pulse intensity, thus ensuring safe operation of the device. The stainless steel sleeve 312 provides a sealed mounting cavity for the air bladder 313, isolating it from external water flow and impurities. It also provides limiting guidance for the expansion and contraction of the air bladder 313, ensuring precise and controllable deformation direction. The air bladder 313 is the regulating component of the flux regulating component 3, expanding through inflation and deflating. The reciprocating contraction action squeezes or releases the PET braided tubular membrane 315 and the spiral guide plate 10, achieving dynamic adjustment of the flow channel width and driving water flow pulses. The aramid fiber braided skeleton 314 covers the outer wall of the airbag 313. Utilizing the ultra-high tensile strength and fatigue resistance of aramid fibers, it enhances the structural strength of the airbag 313, avoids fatigue damage caused by repeated inflation and deflation of the airbag 313, and extends the service life of the airbag 313, solving the problems of easy damage and short service life of traditional airbags 313. The PET braided tubular membrane 315 is attached to the inner side of the aramid fiber braided skeleton 314 and is in adaptive contact with the ultrafiltration membrane fiber 413. When the airbag 313 expands, it uniformly transmits the compressive force, ensuring uniform deformation of the spiral guide plate 10, while avoiding scratch damage caused by direct contact between the airbag 313 and the ultrafiltration membrane fiber 413.

[0031] High-pressure gas is injected into the airbag 313 by the booster pump 61 of the air pressure regulating component 6, causing the airbag 313 to expand and squeeze the PET braided tubular membrane 315 and the spiral guide plate 10, thereby narrowing the flow channel and increasing the water flow rate. In conjunction with the negative pressure pump 62, the gas in the airbag 313 is quickly extracted, causing the airbag 313 to shrink and recover, and the flow channel is restored. Through the high-frequency alternating action of inflation and deflation, the water flow in the ultrafiltration membrane cartridge 2 can be continuously pulsed back and forth, realizing the full-area flushing of the ultrafiltration membrane fibers 413. At the same time, the pressure protection of the pressure relief valve 311 and the structural reinforcement of the aramid fiber braided skeleton 314 solve the technical defects of weak pressure regulation and easy damage of components in traditional devices.

[0032] Furthermore, the air intake assembly 4 includes a shell wall 41 installed on the outer wall of the ultrafiltration membrane cartridge 2 and multiple ultrafiltration membrane fibers 413 located in the inner cavity of the ultrafiltration membrane cartridge 2. The shell wall 41 is provided with multiple one-way air intake valves 411, and the other end of each of the multiple one-way air intake valves 411 is provided with an air passage pipe 412. One end of the air passage pipe 412 is inserted between the multiple ultrafiltration membrane fibers 413.

[0033] The shell 41 serves as the protective mounting housing for the air intake assembly 4, fixed to the outer wall of the ultrafiltration membrane cartridge 2. It provides installation and protection for the one-way air intake valve 411, isolates external impurities, and ensures the cleanliness of the air intake channel. The one-way air intake valve 411 is a one-way air intake control element that only allows external gas to flow into the inner cavity of the ultrafiltration membrane cartridge 2 in one direction, preventing water leakage from the cartridge. When the pressure inside the ultrafiltration membrane cartridge 2 is lower than the external atmospheric pressure, the valve automatically opens, introducing external gas into the water flow inside the cartridge to form a gas-water mixture. The air passage pipe 412 is inserted between the ultrafiltration membrane fibers 413, and the pipe wall has multiple sets of nozzles for uniformly delivering the gas introduced by the one-way air intake valve 411 to the gaps between the ultrafiltration membrane fibers 413. The gas is then ejected in the form of microbubbles through the nozzles to achieve gas-water flushing.

[0034] During the backwashing process, when the water flow inside the ultrafiltration membrane cartridge 2 pulses up and down, the pressure inside the cartridge changes periodically with the water flow. When the pressure inside the cartridge is lower than the external air pressure, the one-way air inlet valve 411 automatically opens, and external gas is delivered to the ultrafiltration membrane fibers 413 through the air passage pipe 412. It mixes with the water flow in the form of microbubbles to form a bubble mixture, thus forming an air-water combined cleaning mechanism. The microbubbles break during the water flow pulse, and the generated microjet can further enhance the scouring effect on the surface of the ultrafiltration membrane fibers 413. At the same time, when the gas is ejected, it can directly scouring the surrounding ultrafiltration membrane fibers 413 in a directional manner, increasing the power of water flow scouring, and further solving the problems of excessively rapid flux decay and poor cleaning effect in traditional backwashing.

[0035] Furthermore, the air pressure regulating component 6 includes a booster pump 61 and a negative pressure pump 62. Both the booster pump 61 and the negative pressure pump 62 are located on one side of the support frame 1. The output end of the booster pump 61 is provided with an air delivery pipe 611, and the input end of the negative pressure pump 62 is provided with an air intake pipe 621. One end of both the air delivery pipe 611 and the air intake pipe 621 is connected to a gas pipe 63. The output end of the booster pump 61 and the input end of the negative pressure pump 62 are both connected to the adjacent regulating valve 5 through the gas pipe 63, and one-way valve 612 is provided at one end of the air delivery pipe 611 connected to the output end of the booster pump 61.

[0036] The booster pump 61 generates a high-pressure air source to provide positive pressure for the inflation of the airbag 313, serving as the power source for narrowing the flow channel and increasing the water flow rate. The negative pressure pump 62 generates a negative pressure air source to provide negative pressure for the deflation of the airbag 313, working in conjunction with the booster pump 61 to achieve the reciprocating inflation and deflation of the airbag 313, driving a continuous pulse of water flow. The air delivery pipe 611 stably delivers the high-pressure gas output from the booster pump 61 to the gas pipe 63, ultimately entering the airbag 313, ensuring the sealed delivery of the positive pressure air source. The suction pipe 621 carries the gas inside the airbag 313 through the gas pipe. Gas pipe 63 and regulating valve 5 are supplied to the input end of negative pressure pump 62 to realize the rapid extraction of gas in airbag 313 and ensure the efficiency of negative pressure suction; gas pipe 63 is used to connect gas supply pipe 611, gas intake pipe 621 and regulating valve 5 to realize unified conduction and control of inflation and deflation gas paths; one-way valve 612 is installed on gas supply pipe 611 at the output end of booster pump 61, allowing gas to flow unidirectionally from booster pump 61 to airbag 313, preventing high-pressure gas in airbag 313 from flowing back to booster pump 61, ensuring stable inflation pressure, and protecting booster pump 61 from damage by reverse air pressure impact.

[0037] By alternating the operation of the booster pump 61 and the negative pressure pump 62, and with the precise control of the regulating valve 5, the high-frequency inflation and deflation of the air bladder 313 is achieved. The higher the frequency of inflation and deflation, the more drastic the change in the pressure on the water flow inside the ultrafiltration membrane cartridge 2, the larger the water flow pulse amplitude, and the better the scouring effect on the ultrafiltration membrane fibers 413. At the same time, the one-way shut-off function of the one-way valve 612 ensures that the inflation pressure is stable and controllable, further improving the accuracy of the device's pressure regulation and ensuring the long-term stable operation of the device.

[0038] Working principle: When high levels of suspended solids appear inside the ultrafiltration membrane cartridge 2, causing membrane pore blockage and the formation of a "dead water zone" in the internal flow channel, the transmembrane pressure difference rises sharply and the flux decreases rapidly; Perform the following operations: First, the backwashing mode is activated, so that the water flows from the main pipe 71 through the main filter cartridge 7 and the water purification chamber 9 into the ultrafiltration membrane cartridge 2, in order to prevent the water from flowing through the pipe into the water purification chamber 9 and flowing over the outer wall of the ultrafiltration membrane fiber 413 to wash the surface of the ultrafiltration membrane fiber 413 and forming a dead water zone. Open the regulating valve 5 and start the booster pump 61 in the air pressure regulating component 6. The booster pump 61 delivers high-pressure gas through the air delivery pipe 611 and the gas pipe 63 to the air bag 313 in the flow regulating component 3. After the air bag 313 is inflated, it expands and squeezes the PET braided tube membrane 315 and the spiral guide plate 10. This narrows the width of the water flow channel in the center of the spiral guide plate 10. After the width narrows, the flow velocity in the channel increases and the scouring force increases while the water pressure remains constant. In addition, the negative pressure pump 62 is activated to remove the gas from the air bag 313. The inflation and deflation are carried out simultaneously. The higher the frequency of the deflation, the greater the squeezing force on the water flow inside the ultrafiltration membrane cartridge 2. This squeezing force causes the water flow inside the ultrafiltration membrane cartridge 2 to reciprocate in pulses. During the pulse process, the stagnant water area inside the cartridge can be avoided. The water flow direction is up and down, which can achieve efficient rinsing of the surface of the ultrafiltration membrane fiber 413, improve the power of water rinsing, and improve the cleaning effect. It should be noted that, in order to avoid excessive internal water flow pulse intensity, which could cause a sudden increase in internal pressure, the pressure relief valve 311 at the top can prevent excessive internal pressure and excessive water flow pressure on the airbag 313, which could lead to the airbag 313 bursting. In addition, during this process, in order to improve the flushing effect of the internal water flow, when the water flow in the ultrafiltration membrane cartridge 2 flows from the top to the bottom, the pressure inside the ultrafiltration membrane cartridge 2 is less than the external air pressure. The one-way air inlet valve 411 of the air inlet assembly 4 can introduce the gas outside the ultrafiltration membrane cartridge 2 into the water flow inside the ultrafiltration membrane cartridge 2. When the water flow reciprocates and pulses inside the ultrafiltration membrane cartridge 2, the gas enters the air passage pipe 412 after passing through the one-way air inlet valve 411 and is then ejected through multiple nozzles opened on the air passage pipe 412. The bubble mixture can improve the flushing effect, and when the gas is ejected, it can also flush the ultrafiltration membrane fibers 413 that are in contact with the nozzles. The impurities after flushing are discharged through the pipe.

[0039] The above description is only a preferred embodiment of the present invention, but 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 inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-strength, high-flux ultrafiltration membrane purification device, characterized in that, Includes a support frame (1), the top of which is provided with multiple ultrafiltration membrane cartridges (2), which are connected to each other by pipes. Each ultrafiltration membrane cartridge (2) is provided with a flux adjustment component (3) and an air inlet component (4). The bottom of the flux adjustment component (3) is provided with a regulating valve (5), and one end of the regulating valve (5) is connected to a pressure regulating component (6) through a pipe. The inner cavity of the ultrafiltration membrane cartridge (2) is provided with a spiral guide plate (10). The cross-section of the spiral guide plate (10) is hourglass-shaped with a concave center and open ends. The bottom end of the spiral guide plate (10) is the water inlet opening (101), and the top end is the water outlet opening (102). The top water outlet (102) of the spiral guide plate (10) is provided with multiple annular water collection covers (11). The top of each water collection cover (11) is provided with multiple guide pipes (111) arranged in an annular array. The guide pipes (111) are all arranged in an arc-shaped inclined shape. The tops of the multiple guide pipes (111) are connected and fixed by positioning guide plates (112). The flux adjustment assembly (3) includes a flange mounting plate (31) provided on the outer wall of the ultrafiltration membrane cartridge (2). The top of the flange mounting plate (31) is provided with a pressure relief valve (311), and the bottom of the flange mounting plate (31) is provided with a stainless steel sleeve (312). The inner cavity of the stainless steel sleeve (312) is provided with an annularly arranged airbag (313). The outer wall of the airbag (313) is provided with an aramid fiber braided skeleton (314). A PET braided tube membrane (315) is attached to one side of the aramid fiber braided skeleton (314). The air pressure regulating component (6) includes a booster pump (61) and a negative pressure pump (62). Both the booster pump (61) and the negative pressure pump (62) are located on one side of the support frame (1). The output end of the booster pump (61) is provided with an air delivery pipe (611), and the input end of the negative pressure pump (62) is provided with an air intake pipe (621). One end of both the air delivery pipe (611) and the air intake pipe (621) is connected to a gas pipe (63). The output end of the booster pump (61) and the input end of the negative pressure pump (62) are both connected to an adjacent regulating valve (5) through the gas pipe (63). A one-way valve (612) is provided at one end of the air delivery pipe (611) connected to the output end of the booster pump (61).

2. The high-intensity, high-flux ultrafiltration membrane purification device according to claim 1, characterized in that, The other end of the support frame (1) is provided with two main filter cylinders (7), and both ends of the multiple main filter cylinders (7) are provided with main pipes (71). The other end of the support frame (1) is also provided with a water inlet pipe (8), one end of the water inlet pipe (8) is provided with multiple L-shaped pipes (81), and the other end of the multiple L-shaped pipes (81) is connected to the water inlet of the adjacent ultrafiltration membrane cartridge (2).

3. The high-strength, high-flux ultrafiltration membrane purification device according to claim 2, characterized in that, Each of the multiple ultrafiltration membrane cartridges (2) is provided with a water purification chamber (9) at its top, and the water purification chamber (9) is provided with an outlet (91) at its top. The outlet (91) is connected to the main filter cartridge (7) through a pipe.

4. The high-strength, high-flux ultrafiltration membrane purification device according to claim 1, characterized in that, The air intake assembly (4) includes a shell wall (41) installed on the outer wall of the ultrafiltration membrane cartridge (2) and multiple ultrafiltration membrane fibers (413) located in the inner cavity of the ultrafiltration membrane cartridge (2). The shell wall (41) is provided with multiple one-way air intake valves (411), and the other end of each of the multiple one-way air intake valves (411) is provided with an air passage pipe (412). One end of the air passage pipe (412) is inserted between the multiple ultrafiltration membrane fibers (413).

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