Ultrapure water manufacturing system and technology

Abstract

The invention relates to the technical field of ultrapure water preparation, in particular to an ultrapure water manufacturing system and process, and the ultrapure water manufacturing system comprises an ultrafiltration mechanism which is used for carrying out ultrafiltration on raw water and carrying out automatic backwashing. The ultrafiltration mechanism comprises an ultrafiltration assembly and a backwashing assembly; the ultrafiltration assembly is used for filtering raw water and switching an ultrafiltration membrane at the same time; the backwashing assembly is arranged below the ultrafiltration assembly and is used for backwashing the switched ultrafiltration membrane; the reverse osmosis mechanism is arranged behind the ultrafiltration mechanism and is used for carrying out reverse osmosis filtration on the water subjected to ultrafiltration, and the reverse osmosis mechanism comprises a primary filtration assembly and a secondary filtration assembly, the primary filtration assembly is used for carrying out primary reverse filtration on the water and completing backwashing at the same time, and the secondary filtration assembly is used for keeping stable output of water flow; the deionization mechanism is arranged below the reverse osmosis mechanism and is used for assisting EDI deionization, and the deionization mechanism comprises an auxiliary assembly for promoting ion removal and a cleaning assembly for cleaning the polar plate. The technical problem that various filtering membranes are short in service life is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrapure water preparation, and in particular to an ultrapure water manufacturing system and process. Background Art

[0002] Ultrapure water, also known as UP water, refers to water with a resistivity of 18 MΩ*cm (25°C). This water contains almost no impurities except water molecules, and no bacteria, viruses, organic matter such as chlorinated dioxins, and of course no trace mineral elements required by the human body. In other words, it is water from which almost all atoms except oxygen and hydrogen have been removed. It can be used in the preparation process of ultrapure materials (semiconductor component materials, nano-fine ceramic materials, etc.) using distillation, deionization, reverse osmosis technology or other appropriate supercritical fine technology.

[0003] Patent document CN109562964B discloses ultrapure water production equipment, including an ultrafiltration membrane device. The ultrafiltration membrane device includes a plurality of ultrafiltration membranes connected in series. The plurality of ultrafiltration membranes include a first ultrafiltration membrane and a second ultrafiltration membrane located farthest downstream among the plurality of ultrafiltration membranes, wherein the second ultrafiltration membrane has a filtering performance different from that of the first ultrafiltration membrane.

[0004] However, in actual use, the production of ultrapure water requires the use of multiple membranes for filtration, but as the usage time increases, the filtration performance of the membrane will gradually deteriorate. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies of the prior art. By setting up an ultrafiltration mechanism, a reverse osmosis mechanism and a deionization mechanism, various filter membranes can be cleaned while achieving efficient preparation of pure water, thereby ensuring the filtration efficiency of the filter membranes and solving the technical problem of short service life of various filter membranes.

[0006] In view of the above technical problems, the technical solutions adopted are as follows: An ultrapure water production system includes a bag filter unit for preliminary filtering of raw water, a UV sterilizer unit for sterilizing pure water, a precision filter unit arranged behind the UV sterilizer unit, and a filter unit arranged between the bag filter unit and the UV sterilizer unit and for filtering raw water, wherein the filter unit includes: An ultrafiltration mechanism, the ultrafiltration mechanism is used to ultrafilter raw water and perform self-backwashing. The ultrafiltration mechanism includes an ultrafiltration component for filtering raw water and switching ultrafiltration membranes, and a backwash component arranged below the ultrafiltration component and used to backwash the switched ultrafiltration membranes; A reverse osmosis mechanism, which is arranged behind the ultrafiltration mechanism and is used to perform reverse osmosis filtration on the ultrafiltered water. The reverse osmosis mechanism includes a primary filtration component that performs a first reverse filtration on the water and completes backwashing at the same time, and a secondary filtration component that maintains a stable water flow output; The deionization mechanism is arranged below the reverse osmosis mechanism and is used to assist the EDI deionization. The deionization mechanism comprises an auxiliary component for promoting ion removal and a cleaning component for cleaning the electrode plate.

[0007] Preferably, the ultrafiltration assembly comprises a raw water tank for holding raw water, two groups of arc-shaped ultrafiltration plates vertically sliding on one side of the raw water tank and arranged in contact with each other, a card slot arranged on the bottom side of the two groups of ultrafiltration plates, a first telescopic cylinder arranged on one side of the arc-shaped ultrafiltration plate and used to drive the arc-shaped ultrafiltration plate to move up and down, and a card block arranged at the end of the first telescopic cylinder and driven by a motor; Preferably, the primary filtration component includes an annular transfer bin arranged outside the raw water bin, a partition plate rotatably connected in the transfer bin and driven by a motor, a first semipermeable membrane arranged on the side wall of the transfer bin and opposite to the ultrafiltration plate, a No. 1 water storage tank arranged outside the semipermeable membrane, a push plate arranged on one side of the first semipermeable membrane transfer bin and driven by an electric cylinder, and a water retention groove is arranged on the push plate.

[0008] Preferably, the primary filtration assembly further comprises a reflux plate arranged outside the first semipermeable membrane, the bottom of the reflux plate is horizontally slidably connected to the side wall of the first water storage tank and a spring is arranged between the reflux plate and the side wall of the water outlet side.

[0009] Preferably, the backwash component includes a concentrate tank arranged at the bottom of the transfer tank, a water hole arranged on the inner side of the No. 1 semipermeable membrane, a sealing plug arranged in the water hole and controlled by an electric cylinder, a spray group arranged on the side of the concentrate tank close to the ultrafiltration membrane and composed of multiple groups of nozzles, and a recovery pipe arranged at the bottom of the ultrafiltration membrane.

[0010] Preferably, the secondary filtration component includes a stabilizing chamber arranged below the No. 1 water storage tank, multiple groups of semi-permeable membrane filter elements arranged in the stabilizing chamber and driven to rotate by a motor, an input pipe connecting the No. 1 water storage tank and one end of the filter element, and a concentrated water pipe connecting the other end of the filter element and the transfer chamber.

[0011] Preferably, the auxiliary components include a clean water tank for containing reverse osmosis water for ion removal and connected to a stabilizing tank through a bottom output pipe, a turntable arranged in the middle of the clean water tank and driven by a motor, an anion exchange membrane and a cation exchange membrane rotating on both sides of the turntable respectively, a gear arranged below the clean water tank and fixedly connected to a rotating shaft of the anion and cation exchange membrane, and a rack arranged below the clean water tank and used to drive the gear to rotate.

[0012] It also includes a water outlet pipe arranged above the middle of the clean water tank and a drainage pipe arranged on both sides of the clean water tank and connected to the first water storage tank through a water pump.

[0013] Preferably, the auxiliary component also includes two groups of electrodes arranged on both sides of the water purification pool, each group of electrodes includes nested inner and outer plates, fixing ears arranged on the top of the inner and outer plates, a clutch frame that is simultaneously engaged with the fixing ears on the inner and outer plates in different groups of electrodes, a fixed platform for making the clutch frame slide horizontally and driven up and down by a telescopic cylinder, and a drive motor arranged on the fixed platform and used to drive the clutch frame to slide.

[0014] Preferably, the cleaning assembly includes a movable frame fixedly connected to the clutch frame, slide grooves arranged on both sides of the movable frame and located above the motor, a moving block arranged on the slide and driven by a linear motor, and a scraper arranged under the moving block.

[0015] As another preferred embodiment, the ultrapure water manufacturing process is applied to an ultrapure water manufacturing system, including: preliminary filtration, raw water passes through a bag filter unit to filter out solid impurities with larger volume; pure water filtration, filtering through layers of filtration in the filtration unit to form filtered water; disinfection and sterilization, using a UV sterilizer unit to sterilize the filtered water; precision filtration, using a precision filter unit to perform precision filtration to form final pure water; in detail, pure water filtration includes the following steps: Step 1, ultrafiltration step, raw water is passed into the raw water tank, the raw water is filtered through the ultrafiltration membrane, and enters the transfer tank, and moves to the inner side of the first semipermeable membrane through the rotation of the partition plate; Step 2, the first reverse osmosis filtration and backwashing step, the ultrafiltration water moved to one side of the first semipermeable membrane passes through the first semipermeable membrane under the push of the push plate and opens the reflux plate, enters the No. 1 water storage tank, and then the push plate is reset, and the reflux plate is also reset under the action of the spring, and the reverse osmosis water between the reflux plate and the first semipermeable membrane is squeezed back to the transfer bin to achieve backwashing of the first semipermeable membrane, and then flows into the concentrated water bin together with the concentrated water that has not passed through the first semipermeable membrane. With continuous purification, the ultrafiltration membrane is switched up and down after a certain period of use. When the ultrafiltration membrane used above moves down, the nozzle draws concentrated water in the concentrated water bin to reversely wash the ultrafiltration membrane, and the wastewater flows out of the device through the recovery pipe; Step 3: The second reverse osmosis filtration, the water in the No. 1 water storage tank enters the semi-permeable membrane filter element, the filter element rotates to throw out the water in it, enters the stabilizing chamber, and enters the deionization mechanism through the stabilizing chamber. At the same time, part of the water is not thrown out of the filter element but flows back to the transfer field through the concentrated water pipe for re-filtration; Step 4, deionization step, reverse osmosis water flows into the water purification pool, the plates are charged to remove ions, and the pure water in the middle flows out of the device through the outlet. With long-term use, the turntable rotates. When the turntable rotates °, the anion and cation exchange membrane also rotates to adjust the position of the anion and cation exchange membrane. At the same time, the plates are also switched, and the charges carried by the plates on both sides are also reversed, so that the direction of ions passing through the anion and cation exchange membrane is changed, and the anion and cation exchange membrane is cleaned. At the same time, the surface of the upper and switched plate is cleaned with a scraper.

[0016] Beneficial effects of the present invention: (1) The present invention provides an ultrafiltration mechanism, and under the premise of ensuring uninterrupted filtration of raw water, the filtration performance of the ultrafiltration membrane can be ensured by switching the ultrafiltration membrane. At the same time, the replaced ultrafiltration membrane can be cleaned during the interval of switching the ultrafiltration membrane, thereby cleaning the impurities and pollution on the surface of the ultrafiltration membrane, thereby extending the service life of the ultrafiltration membrane; (2) The present invention realizes the primary reverse osmosis filtration and the secondary reverse osmosis filtration of water by setting a reverse osmosis mechanism. While ensuring the filtration efficiency of water, the first semipermeable membrane is frequently cleaned by backwashing of the reflux plate to reduce the residual impurities on the first semipermeable membrane. At the same time, the second reverse osmosis filtration of water is completed in cooperation with the filter element, thereby reducing the use of water pumps, slowing down the pollution of the semipermeable membrane and reducing costs. (3) In the present invention, the deionization assembly is used to change the position of the anion and cation exchange membrane and adjust the matching electrode plate, so that the direction of ions passing through the anion and cation semipermeable membrane is changed. By utilizing this change in direction, the ions are prevented from adhering to the anion and cation semipermeable membrane, thereby extending the service life of the anion and cation semipermeable membrane; BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 Schematic diagram of the overall structure of an ultrapure water manufacturing system.

[0018] Figure 2 Schematic diagram of the internal structure of an ultrapure water production system.

[0019] Figure 3 Schematic diagram of the structure of the ultrafiltration component.

[0020] Figure 4 It is a structural diagram of a primary filtration component.

[0021] Figure 5 It is a schematic diagram of the structure of the backwash component.

[0022] Figure 6 It is a cross-sectional schematic diagram of the ultrafiltration component and the backwash component.

[0023] Figure 7 This is a schematic diagram of the working status of a primary filtration component.

[0024] Figure 8 It is a structural schematic diagram of the secondary filtration component.

[0025] Fig. 9 This is a schematic diagram of the relevant structure of the water purification pool.

[0026] Fig.10 Schematic diagram of the relevant structure of the electrode.

[0027] Fig.11 A schematic cross-sectional view of an auxiliary component.

[0028] Fig.12 A schematic diagram of the structure of the cleaning component.

[0029] Fig.13 The figure is a schematic diagram of a process for producing ultrapure water.

[0030] Fig.14 This is the main process flow chart for the preparation of ultrapure water. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0032] Embodiment 1 like Figure 1 , Figure 2 As shown, an ultrapure water production system includes a bag filter unit 01 for preliminary filtering of raw water, a UV sterilizer unit 02 for sterilizing pure water, a precision filter unit 03 arranged behind the UV sterilizer unit 02, and a filter unit 04 arranged between the bag filter unit 01 and the UV sterilizer unit 02 and used for filtering raw water, wherein the filter unit 04 includes: The ultrafiltration mechanism 1 is used to ultrafilter raw water and perform self-backwashing. The ultrafiltration mechanism 1 includes an ultrafiltration component 11 for filtering raw water and switching ultrafiltration membranes, and a backwash component 12 disposed below the ultrafiltration component 11 and used to backwash the switched ultrafiltration membranes; A reverse osmosis mechanism 2, which is arranged behind the ultrafiltration mechanism 1 and is used to perform reverse osmosis filtration on the ultrafiltered water. The reverse osmosis mechanism 2 includes a primary filtration component 21 for performing a first reverse filtration on the water and completing backwashing at the same time, and a secondary filtration component 22 for maintaining a stable water flow output; The deionization mechanism 3 is arranged below the reverse osmosis mechanism 2 and is used to assist the EDI deionization. The deionization mechanism 3 includes an auxiliary component 31 for promoting ion removal and a cleaning component 32 for cleaning the electrode plate.

[0033] In this embodiment, by providing an ultrafiltration mechanism 1, a reverse osmosis mechanism 2 and a deionization mechanism 3, integrated preparation of ultrapure water is achieved, saving various tanks, pipes and water pumps required for water transport. At the same time, without affecting continuous preparation, backwashing of various membranes can be completed, thereby greatly extending the service life of the ultrafiltration membrane, semipermeable membrane and anion and cation exchange membrane 313 and reducing costs.

[0034] In detail, the main process of ultrapure water preparation is as follows: Fig.14 As shown; The raw water filtered by the bag filter unit 01 needs to be filtered through the ultrafiltration membrane, the semipermeable membrane in the two reverse osmosis systems, and the anion and cation exchange membrane 313 in order to become ultrapure water. However, in the process of preparing pure water, as the service life of various membranes increases, various pollutants will gradually adhere to the surface of the membrane, causing the filtration capacity of the membrane to continue to decline. Based on this, the filtration efficiency of the membrane is generally ensured by directly replacing the membrane or cleaning the membrane. Directly replacing the membrane will result in higher costs. For cleaning the membrane, the backwash method is often used. However, since the preparation of pure water is a continuous production process, backwashing the membrane often requires downtime, which wastes time. Therefore, both methods have certain disadvantages.

[0035] In the present application, by providing an ultrafiltration mechanism 1, a reverse osmosis mechanism 2 and a deionization mechanism 3, pure water is continuously prepared while the membrane is backwashed, which slows down the accumulation of pollutants on the membrane surface, thereby increasing the service life of the membrane and reducing costs.

[0036] It should be noted that in the prior art, in order to allow water to pass through a complete production process, a large number of high-pressure water pumps need to be installed to apply pressure to the water, thereby promoting the operation of the reverse osmosis system, which is relatively expensive. In this application, various methods such as pushing, rotating, and gravity are used to promote the flow of water, reduce the use of high-pressure pumps, and reduce energy consumption.

[0037] It is worth mentioning that the device reduces the setting of various pipelines and integrates various tanks with filtering components to reduce the time required for filtration and improve filtration efficiency.

[0038] Further, if Figure 3 , Figure 6 As shown, the ultrafiltration assembly 11 includes a raw water tank 111 for containing raw water, two groups of arc-shaped ultrafiltration plates 112 vertically sliding on one side of the raw water tank 111 and arranged in contact with each other, a clamping groove 113 arranged on the bottom side of the two groups of ultrafiltration plates 112, a first telescopic cylinder 114 arranged on one side of the arc-shaped ultrafiltration plate 112 and used for driving the arc-shaped ultrafiltration plate 112 to move up and down, and a clamping block 115 arranged at the end of the first telescopic cylinder 114 and driven by a motor; In this embodiment, the raw water tank 111 and the arc-shaped filter plate are provided to achieve ultrafiltration of the raw water. Meanwhile, the filter plate can be switched up and down so that the ultrafiltration membrane can always maintain a high filtration efficiency.

[0039] In detail, raw water is continuously input into the raw water tank 111, filtered by the ultrafiltration membrane and flows out of the raw water tank 111. As the use time increases, the inner surface of the ultrafiltration membrane is gradually contaminated. At this time, the telescopic rod of the first telescopic cylinder 114 is shortened, and the other ultrafiltration plate 112 at the bottom is pulled up. Then, the motor block 115 rotates, and the block 115 is disengaged from the slot 113 on the new ultrafiltration plate 112 and inserted into the slot 113 of the old ultrafiltration plate 112. The telescopic rod of the telescopic cylinder is extended again to move the old ultrafiltration plate 112 to the bottom, completing the switch, thereby ensuring the ultrafiltration efficiency.

[0040] It should be noted that the ultrafiltration membrane filters the raw water, and its main function is to remove macromolecular organic matter, proteins, bacteria and viruses in the water. It uses the microporous structure of the ultrafiltration membrane to physically isolate the water, so that when the water passes through the membrane, only substances with small molecular weight can pass through, while other macromolecular substances are retained on the outside of the filter membrane, so that the preliminary purification of the water can be achieved. After long-term use, a large amount of impurities are easily adhered to the micropores on the surface of the ultrafiltration membrane, and it is often necessary to use a large water flow for backwashing to achieve a good cleaning effect. Based on this, the two ultrafiltration plates 112 in the present application can be switched more frequently, and by cooperating with the subsequent backwash component 12, the shallow pollution of the ultrafiltration membrane can be effectively cleaned to avoid deepening of pollution and difficulty in cleaning, thereby improving the service life.

[0041] It is worth mentioning that by switching between the two sets of ultrafiltration plates 112, the raw water can be filtered without stopping and there is sufficient time to clean the other ultrafiltration plate 112, thereby increasing the service life of the ultrafiltration membrane.

[0042] Further, if Figure 4 , Figure 6 , Figure 7As shown, the primary filtration component 21 includes an annular transfer bin 211 arranged outside the raw water bin 111, a partition plate 212 rotatably connected in the transfer bin 211 and driven by a motor, a first semipermeable membrane 213 arranged on the side wall of the transfer bin 211 and located opposite to the ultrafiltration plate 112, a No. 1 water storage tank 214 arranged outside the semipermeable membrane, a push plate 215 arranged on one side of the first semipermeable membrane 213 transfer bin 211 and driven by an electric cylinder, and a water retention groove 216 is arranged on the push plate 215.

[0043] In this embodiment, the first reverse osmosis filtration of ultrafiltration water is achieved by setting a partition plate 212, a push plate 215 and a first semipermeable membrane 213. The push plate 215 is used to push the water through the semipermeable membrane for filtration, while retaining part of the concentrated water for subsequent reuse.

[0044] In detail, water exceeding the ultrafiltration membrane enters the transfer chamber 211, and the partition plate 212 divides the transfer chamber 211 into multiple groups of spaces. The rotation of the partition plate 212 moves the water from one side of the ultrafiltration membrane to the side of the first semipermeable membrane 213, and then the push plate 215 is pushed out, and the thrust is used to make the water pass through the first semipermeable membrane 213 and flow into the No. 1 water storage tank 214.

[0045] In the prior art, a high-pressure pump is often used to pump water in, and the pressure of the water pump is used to enable the water to pass through a semipermeable membrane. However, this method is not easy to control the concentration of the separated concentrated water, resulting in a large water content in the concentrated water, reducing the filtering effect of the water, causing excess water to be filtered out, and increasing the outflow ratio of wastewater.

[0046] It should be noted that the partition plate 212 divides the transfer rack into multiple spaces, so that water can be transported in batches to one side of the first semipermeable membrane 213 for filtration. In the closed space, the thrust of the push plate 215 is used to make water pass through the semipermeable membrane. At the same time, the water retention groove 216 reserved on the push plate 215 can accommodate concentrated water, thereby achieving control of the amount of concentrated water.

[0047] It is worth mentioning that by filtering the water in batches, the push plate 215 pushes the water through the first semipermeable membrane 213, and the ultrafiltration membrane on the other side inputs water into the partition plate 212 to accumulate water. In this process, the water in the raw water tank 111 can be kept at a high water level, and gravity is used to make the water pass through the ultrafiltration membrane instead of using external force to drive the water. This can reduce the degree of intrusion of pollutants into the ultrafiltration membrane and make subsequent cleaning more convenient.

[0048] Further, if Figure 5 , Figure 7 As shown, the primary filtration assembly 21 also includes a return plate 217 arranged outside the first semipermeable membrane 213, the bottom of the return plate 217 is horizontally slidably connected to the side wall of the first water storage tank 214 and a spring is arranged between the return plate 217 and the side wall of the water outlet side.

[0049] In this embodiment, the reverse osmosis water is isolated by providing the reflux plate 217, and the backwashing of the first semi-permeable membrane 213 is achieved by rebounding.

[0050] In detail, while the push plate 215 pushes the water toward the first semipermeable membrane 213, the water pushes open the return plate 217 after passing through the first semipermeable membrane 213, flows out from the outlet above the return plate 217, and enters the first water storage tank. When the push plate 215 returns to its original position, the water between the return plate 217 and the push plate 215 loses the driving thrust, and the return plate 217 rebounds rapidly under the action of the spring, and all the water between the return plate 217 and the first semipermeable membrane 213 is squeezed back into the first semipermeable membrane 213, and this part of water is used to backwash the first semipermeable membrane 213.

[0051] It should be noted that, under the action of the spring, when the return plate 217 is in the initial position, the return plate 217 is attached to the outside of the first semipermeable membrane 213. When water flows out, the return plate 217 moves, and a gap opens above the return plate 217. Water can flow out from the top and enter the first water storage tank. At this time, the return plate 217 acts as a partition to separate the water on both sides, so that the water can only flow in one direction, avoiding water flow turbulence and affecting filtration.

[0052] It is worth mentioning that the water can be moved in batches through the partition plate 212, and backwashing can be performed after each water filtration, which greatly improves the service life of the membrane, slows down the adhesion of pollutants on the membrane surface, and enables the membrane to maintain good filtration performance for a longer period of time.

[0053] Further, if Figure 5 As shown, the backwash component 12 includes a concentrated water tank 121 arranged at the bottom of the transfer tank 211, a water hole 122 arranged on the inner side of the first semipermeable membrane, a sealing plug 123 arranged in the water hole 122 and controlled by an electric cylinder, a spray group 124 arranged on the side of the concentrated water tank 121 close to the ultrafiltration membrane and composed of multiple groups of nozzles, and a recovery pipe 125 arranged at the bottom of the ultrafiltration membrane.

[0054] In this embodiment, the backwashing of the ultrafiltration membrane is achieved by providing a spray group 124, and the pollutants on the inner surface of the ultrafiltration membrane are cleaned by using a spray head.

[0055] In detail, the concentrated water separated by the first semipermeable membrane 213 can be used to backwash the ultrafiltration membrane. Since the first semipermeable membrane is backwashed frequently, it is not easy to accumulate too many pollutants. Therefore, the water used to backwash the first semipermeable membrane 213 can be regarded as concentrated water. After the two are collected, they enter the concentrated water tank 121 through the water hole 122 for storage. When the ultrafiltration membrane is switched, the nozzle sprays water to impact the outer surface of the ultrafiltration membrane, thereby flushing out the pollutants on the inner surface. The waste water is recovered through the recovery pipe 125 at the bottom and output to the device.

[0056] It should be noted that the concentrated water tank 121 is used to store the concentrated water separated by the first filter membrane to ensure that the spray group 124 has sufficient water when spraying water, and the concentrated water is reused to ensure the water output rate of the device.

[0057] Further, if Figure 8 As shown, the secondary filtration component 22 includes a stabilizing chamber 221 arranged below the No. 1 water storage tank 214, a plurality of groups of semi-permeable membrane filter elements 222 arranged in the stabilizing chamber 221 and driven to rotate by a motor, an input pipe 223 connecting the No. 1 water storage tank 214 and one end of the filter element 222, and a concentrated water pipe 224 connecting the other end of the filter element 222 and the transfer chamber 211.

[0058] In this embodiment, a second reverse osmosis filtration of water is achieved by providing a semi-permeable membrane filter element 222 .

[0059] In detail, the water in the first water tank 214 flows into the semi-permeable membrane filter element 222, which rotates under the drive of the motor, and a part of the water inside is thrown out of the filter element 222 and enters the steady flow chamber 221, and the other part passes through the filter element 222 and moves from the input pipe 223 to the concentrated water pipe 224, and then flows back to the transfer chamber 211. A water pump is provided in the concentrated water pipe 224 to promote reflux.

[0060] It should be noted that a rotating filter element 222 is used here to perform a second reverse osmosis filtration on the water. The centrifugal force of the rotation of the filter element 222 is used to enable the water to be thrown out of the filter element 222. While completing the flow of water, the pollutants can be evenly retained inside the filter element 222. At the same time, the filter element 222 should be set at the bottom of the stabilizing chamber 221. The water thrown out by the filter element 222 is collected in the stabilizing chamber 221, gradually filling up the stabilizing chamber 221, so that the filter element 222 is completely immersed in the water. At this time, while the filter element 222 rotates to throw the water out of the filter element 222, it will also be subject to pressure from external water in all directions. This part of the pressure prevents the pollutants inside the filter element 222 from deeply adhering to the filter element 222, but instead distributes them in the filter element 222 in a free state, and then enters the concentrated water pipe 224 for reflux, thereby increasing the service life of the filter element 222.

[0061] It is worth mentioning that since the first semipermeable membrane 213 in the pre-step is for batch water purification, the batch water intake does not allow the subsequent ion removal step to be carried out. Therefore, through the setting of the stabilizing chamber 221, the water can be output downward only after filling the stabilizing chamber 221, so that the water can flow out in a stable state, ensuring the subsequent deionization step.

[0062] Further, if Fig. 9 , Fig.11As shown, the auxiliary component 31 includes a clean water tank 311 for containing reverse osmosis water for ion removal and connected to the stabilizing chamber 221 through a bottom output pipe, a turntable 312 arranged in the middle of the clean water tank 311 and driven by a motor, an anion exchange membrane and a cation exchange membrane rotating on both sides of the turntable 312 respectively, a gear arranged below the clean water tank 311 and fixedly connected to the rotating shaft of the anion and cation exchange membrane 313, and a rack arranged below the clean water tank 311 and used to drive the gear to rotate.

[0063] It also includes a water outlet pipe 314 arranged above the middle of the clean water tank 311 and a drainage pipe 315 arranged on both sides of the clean water tank 311 and connected to the first water storage tank 214 through a water pump.

[0064] In this embodiment, the ions are removed by providing the clean water tank 311 and the anion and cation exchange membrane 313 , and at the same time, the surface contamination of the anion and cation exchange membrane 313 can be removed.

[0065] In detail, when the ion removal work is carried out normally, the anion and cation exchange membranes 313 are located on both sides respectively, and various ions pass through the anion and cation exchange membranes 313 from the middle to the two sides of the clean water pool 311. With long-term use, some ions may be attached to the side of the anion and cation exchange membranes 313 facing the middle. At this time, the turntable 312 rotates to swap the position of the anion and cation exchange membranes 313. While rotating, the anion and cation exchange membranes 313 themselves also rotate 180°, so that the side originally facing the middle faces outward after the rotation is completed. At this time, the corresponding charges carried by the plates on both sides also change, the positive electrode becomes the negative electrode, and the negative electrode becomes the positive electrode. At this time, ion removal is performed again, and the ions in the middle water move to both sides, and at the same time, the attached ions on the outer surface of the ion exchange surface are taken away to complete the cleaning of the anion and cation exchange membranes 313.

[0066] It should be noted that in order to achieve the rotation of the position of the anion and cation exchange membrane 313, it is necessary to rotate the turntable 312 180°. When the turntable 312 rotates a certain angle, the water on the turntable 312 is separated from the water on both sides of the clean water tank 311, and the water at this time does not communicate with each other. Then the anion and cation exchange membrane 313 is rotated to avoid the water from communicating with each other when the anion and cation exchange membrane 313 rotates, causing the originally pure water in the middle to be polluted.

[0067] It is worth mentioning that the concentrated water on both sides of the water purification tank 311 is concentrated water, and the pure water in the middle is concentrated water. The concentrated water on both sides flows back to the No. 1 water storage tank 214 through the drainage pipe 315 for reuse, thereby improving the water output rate of the device.

[0068] Further, if Fig.10 , Fig.11As shown, the auxiliary component 31 also includes two groups of electrodes 316 arranged on both sides of the clean water pool 311, each group of electrodes 316 includes nested inner pole plates 3111 and outer pole plates 3112, fixing ears 3113 arranged on the top of the inner pole plates 3111 and the outer pole plates 3112, a clutch frame 317 that is simultaneously engaged with the fixing ears 3113 on the inner pole plates 3111 and the outer pole plates 3112 in different groups of electrodes 316, a fixing platform 318 used to make the clutch frame 317 slide horizontally and driven by a telescopic cylinder to move up and down, and a driving motor 319 arranged on the fixing platform 318 and used to drive the clutch frame 317 to slide.

[0069] In this embodiment, by providing an inner electrode plate 3111 and an outer electrode plate 3112, and a clutch frame 317 for controlling the movement of the inner and outer electrode plates 3112, the movement of the electrode plates is achieved, so that the motor can cooperate with the rotation of the turntable 312 in the water purification tank 311 and the rotation of the anion and cation exchange membrane 313.

[0070] In detail, by setting the inner pole plate 3111 and the outer pole plate 3112 that are interlocked with each other, each time the outer pole plate 3112 and the inner pole plate 3111 are inserted into the water, if two inner pole plates 3111 or the two outer pole plates 3112 are inserted into the water at the same time, when the pole plates are switched, due to the difference in relative distance between the two groups of inner pole plates 3111 and the two groups of outer pole plates 3112, when the pole plates are given equal charges, there will be a difference in the attraction given by the pole plates to the ions in the water, and since the switching of the pole plates is carried out simultaneously with the rotation of the anion and cation exchange membrane 313, one side of the anion and cation exchange membrane 313 is always facing the type of pole plate with greater attraction, and the other side is always facing the type of pole plate with less attraction. After long-term use, this situation will cause one side to be more polluted than the other side, which is not conducive to the long-term use of the anion and cation exchange membrane 313.

[0071] By using an inner electrode plate 3111 and an outer electrode plate 3112, the positions of the two electrodes are kept consistent before and after switching, so that the electric field in the water remains stable.

[0072] It should be noted that, through the setting of the clutch frame 317, the clutch frame 317 slides left and right under the drive of the motor. Each time it slides, the two ends of the clutch frame 317 will be stuck in the fixed ears 3113 on the required pole plates, thereby lifting the inner pole plates 3111 and the outer pole plates 3112 on both sides to complete the switching without causing interference.

[0073] Further, if Fig.12As shown, the cleaning assembly 32 includes a movable frame 321 fixedly connected to the clutch frame 317, a slide groove 322 arranged on both sides of the movable frame and located above the motor, a moving block 323 arranged on the slide and driven by a linear motor, and a scraper 324 arranged under the moving block 323.

[0074] In this embodiment, the surface of the electrode plate is cleaned by providing a sliding groove and a scraper 324 .

[0075] In detail, the chute 322 and the scraper 324 are arranged on the clutch frame 317, and move with the clutch frame 317. When the plate is switched, the clutch frame 317 slides horizontally, and the corresponding chute 322 also moves horizontally, so that the scraper can always fit the surface of the plate to be cleaned. The scraper scrapes the surface of the plate by using a linear motor drive.

[0076] It should be noted that since the plates are arranged on both sides of the clean water tank 311, and both sides of the clean water tank 311 are concentrated water, the water contains various ions. After long-term use, the various ions react and easily cause scaling on the surface of the plates. The scaling on the surface of the plates will be attracted by the electric charge, which is not conducive to the subsequent ion removal, so it needs to be cleaned frequently.

[0077] Embodiment 2 like Fig.13 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that: Further, if Fig.13 As shown, the ultrapure water manufacturing process is applied to an ultrapure water manufacturing system, including: preliminary filtration, raw water passes through a bag filter unit 01 to filter out large solid impurities; pure water filtration, filtering through layers of filtering units 04 to form filtered water; disinfection and sterilization, using a UV sterilizer unit 03 to sterilize the filtered water; precision filtration, using a precision filter unit 03 to perform precision filtration to form final pure water; in detail, pure water filtration includes the following steps: Step 1, ultrafiltration step, raw water is passed into the raw water tank 111, the raw water is filtered through the ultrafiltration membrane, and enters the transfer tank 211, and moves to the inner side of the first semipermeable membrane 213 through the rotation of the partition plate 212; Step 2, the first reverse osmosis filtration and backwashing step, the ultrafiltration water moved to one side of the first semipermeable membrane 213 passes through the first semipermeable membrane 213 under the push of the push plate 215 and opens the reflux plate 217, and enters the No. 1 water storage tank 214, then the push plate 215 is reset, and the reflux plate 217 is also reset under the action of the spring, and the reverse osmosis water between the reflux plate 217 and the first semipermeable membrane 213 is squeezed back to the transfer bin 211, so as to achieve the backwashing of the first semipermeable membrane 213, and then flows into the concentrated water bin 121 together with the concentrated water that has not passed through the first semipermeable membrane 213. With the continuous purification, the ultrafiltration membrane is switched up and down after a certain period of use. When the ultrafiltration membrane used above moves down, the nozzle draws the concentrated water in the concentrated water bin 121 to reversely wash the ultrafiltration membrane, and the waste water flows out of the device through the recovery pipe 125; Step 3, the second reverse osmosis filtration, the water in the first water tank 214 enters the semipermeable membrane filter element 222, the filter element 222 rotates to throw out the water therein, enters the stabilizing chamber 221, and enters the deionization mechanism 3 through the stabilizing chamber 221, while a part of the water is not thrown out from the filter element 222 but flows back to the transfer field through the concentrated water pipe 224 for re-filtration; Step 4, deionization step, reverse osmosis water flows into the clean water tank 311, the plates are charged to remove ions, and the pure water in the middle flows out of the device through the outlet. With long-term use, the turntable 312 rotates. When the turntable 312 rotates 90°, the anion and cation exchange membrane 313 also rotates to adjust the position of the anion and cation exchange membrane 313. At the same time, the plates are also switched, and the charges carried by the plates on both sides are also reversed, so that the direction of ions passing through the anion and cation exchange membrane 313 is changed, and the anion and cation exchange membrane 313 is cleaned. At the same time, the surface of the upper and switched plates is cleaned using a scraper 324.

[0078] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front and back", "left and right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0079] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0080] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An ultrapure water production system, characterized in that: The invention comprises a bag filter unit (01) for preliminary filtering of raw water, a UV sterilizer unit (02) for sterilizing pure water, a precision filter unit (03) arranged behind the UV sterilizer unit (02), and a filter unit (04) arranged between the bag filter unit (01) and the UV sterilizer unit (02) and for filtering raw water, wherein the filter unit (04) comprises: An ultrafiltration mechanism (1), the ultrafiltration mechanism (1) being used to ultrafilter raw water and to perform self-backwashing; the ultrafiltration mechanism (1) comprising an ultrafiltration component (11) for filtering raw water and simultaneously switching ultrafiltration membranes, and a backwashing component (12) arranged below the ultrafiltration component (11) and for backwashing the switched ultrafiltration membranes; A reverse osmosis mechanism (2), the reverse osmosis mechanism (2) being arranged behind the ultrafiltration mechanism (1) and used to perform reverse osmosis filtration on the ultrafiltered water, the reverse osmosis mechanism (2) comprising a primary filtration component (21) for performing a first reverse filtration on the water and completing backwashing at the same time, and a secondary filtration component (22) for maintaining a stable water flow output; A deionization mechanism (3) is provided below the reverse osmosis mechanism (2) and is used to assist in the EDI deionization process. The deionization mechanism (3) comprises an auxiliary component (31) for promoting ion removal and a cleaning component (32) for cleaning the electrode plate.

2. An ultrapure water production system according to claim (1), characterized in that: The ultrafiltration assembly (11) comprises a raw water tank (111) for containing raw water, two groups of arc-shaped ultrafiltration plates (112) vertically sliding on one side of the raw water tank (111) and arranged to fit each other, a clamping groove (113) arranged on the bottom side of the two groups of ultrafiltration plates (112), a first telescopic cylinder (114) arranged on one side of the arc-shaped ultrafiltration plate (112) and used to drive the arc-shaped ultrafiltration plate (112) to move up and down, and a clamping block (115) arranged at the end of the first telescopic cylinder (114) and driven by a motor.

3. An ultrapure water production system according to claim (1), characterized in that: The primary filtration assembly (21) comprises an annular transfer bin (211) arranged outside the raw water bin (111), a partition plate (212) rotatably connected to the transfer bin (211) and driven by a motor, a first semipermeable membrane (213) arranged on the side wall of the transfer bin (211) and located opposite to the ultrafiltration plate (112), a first water storage tank (214) arranged outside the semipermeable membrane, a push plate (215) arranged on one side of the transfer bin (211) of the first semipermeable membrane (213) and driven by an electric cylinder, and a water retention groove (216) arranged on the push plate (215).

4. An ultrapure water production system according to claim (3), characterized in that: The primary filtering assembly (21) further comprises a return plate (217) arranged outside the first semi-permeable membrane (213); the bottom of the return plate (217) is horizontally slidably connected to the side wall of the first water storage tank (214), and a spring is arranged between the return plate (217) and the side wall of the water outlet side.

5. The ultrapure water production system according to claim (1), characterized in that: The backwash assembly (12) comprises a concentrated water tank (121) arranged at the bottom of the transfer tank (211), a water through hole (122) arranged on the inner side of the first semipermeable membrane, a sealing plug (123) arranged in the water through hole (122) and controlled by an electric cylinder, a spray group (124) arranged on the side of the concentrated water tank (121) close to the ultrafiltration membrane and composed of a plurality of groups of spray heads, and a recovery pipe (125) arranged at the bottom of the ultrafiltration membrane.

6. The ultrapure water production system according to claim (1), characterized in that: The secondary filtration assembly (22) comprises a flow stabilization chamber (221) disposed below the first water storage tank (214), a plurality of groups of semi-permeable membrane filter elements (222) disposed in the flow stabilization chamber (221) and driven to rotate by a motor, an input pipe (223) connecting the first water storage tank (214) and one end of the filter element (222), and a concentrated water pipe (224) connecting the other end of the filter element (222) and the transfer chamber (211).

7. An ultrapure water production system according to claim (1), characterized in that: The auxiliary component (31) comprises a clean water tank (311) for containing reverse osmosis water for ion removal and connected to a steady flow chamber (221) via a bottom output pipe, a turntable (312) arranged in the middle of the clean water tank (311) and driven by a motor, an anion and cation exchange membrane (313) rotatably connected to both sides of the turntable (312), a gear arranged below the clean water tank (311) and fixedly connected to a rotating shaft of the anion and cation exchange membrane (313), and a rack arranged below the clean water tank (311) and used for driving the gear to rotate; It also includes a water outlet pipe (314) arranged above the middle of the clean water tank (311) and drainage pipes (315) arranged on both sides of the clean water tank (311) and connected to the first water storage tank (214) via a water pump.

8. An ultrapure water production system according to claim (7), characterized in that: The auxiliary component (31) further comprises two groups of electrodes (316) arranged on both sides of the water purification pool (311), each group of electrodes (316) comprising an inner electrode plate (3111) and an outer electrode plate (3112) arranged in a nested manner, fixing ears (3113) arranged on the top of the inner electrode plate (3111) and the outer electrode plate (3112), a clutch frame (317) simultaneously engaged with the fixing ears (3113) on the inner electrode plate (3111) and the outer electrode plate (3112) in different groups of electrodes (316), a fixing platform (318) for making the clutch frame (317) slide horizontally and driven by a telescopic cylinder to move up and down, and a driving motor (319) arranged on the fixing platform (318) and used to drive the clutch frame (317) to slide.

9. An ultrapure water production system according to claim (1), characterized in that: The cleaning assembly (32) comprises a movable frame (321) fixedly connected to the clutch frame (317), slide grooves (322) arranged on both sides of the movable frame and located above the motor, a moving block (323) arranged on the slide and driven by the linear motor, and a scraper (324) arranged below the moving block (323).

10. An ultrapure water production process, applied to an ultrapure water production system according to any one of claims 1 to 9, characterized in that: The method comprises: preliminary filtration, wherein the raw water passes through a bag filter unit (01) to filter out solid impurities with a large volume; pure water filtration, wherein the raw water passes through a filter unit (04) to filter out filtered water; disinfection and sterilization, wherein the filtered water is sterilized by a UV sterilizer unit (02); precision filtration, wherein the filtered water is filtered by a precision filter unit (03) to form final pure water; In detail, pure water filtration includes the following steps: Step 1, an ultrafiltration step, wherein raw water is introduced into the raw water tank (111), the raw water is filtered through the ultrafiltration membrane, and enters the transfer tank (211), and moves to the inner side of the first semipermeable membrane (213) through the rotation of the partition plate (212); Step 2, the first reverse osmosis filtration and backwashing step, the ultrafiltration water moved to one side of the first semipermeable membrane (213) passes through the first semipermeable membrane (213) under the push of the push plate (215) and opens the reflux plate (217) to enter the No. 1 water storage tank (214), then the push plate (215) is reset, and the reflux plate (217) is also reset under the action of the spring, and the reverse osmosis water between the reflux plate (217) and the first semipermeable membrane (213) is squeezed back to the transfer tank (211), so as to achieve the backwashing of the first semipermeable membrane (213), and then flows into the concentrated water tank (121) together with the concentrated water that has not passed through the first semipermeable membrane (213). With continuous purification, the ultrafiltration membrane is switched up and down after reaching the preset service life limit. When the upper ultrafiltration membrane that has been used moves down, the nozzle draws the concentrated water in the concentrated water tank (121) to reversely wash the ultrafiltration membrane, and the waste water flows out of the device through the recovery pipe (125); Step three, a second reverse osmosis filtration, the water in the first water storage tank (214) enters the semi-permeable membrane filter element (222), the filter element (222) rotates to throw out the water therein, enters the stabilizing chamber (221), and enters the deionization mechanism (3) through the stabilizing chamber (221), while a portion of the water is not thrown out from the filter element (222) but flows back to the transfer field through the concentrated water pipe (224) for re-filtration; Step 4, deionization step, reverse osmosis water flows into the water purification pool (311), the electrode plates are charged to remove ions, and the pure water in the middle flows out of the device through the outlet. With long-term use, the turntable (312) rotates. When the turntable (312) rotates 90 degrees, the anion and cation exchange membrane (313) also rotates to adjust the position of the anion and cation exchange membrane (313). At the same time, the electrode plates are also switched, and the charges carried by the electrode plates on both sides are also reversed, so that the direction of ions passing through the anion and cation exchange membrane (313) is changed, and the anion and cation exchange membrane (313) is cleaned. At the same time, the surface of the electrode plate located above and switched is cleaned using a scraper (324).

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