Energy-saving ultrapure water equipment

Abstract

The utility model belongs to the technical field of ultrapure water equipment, concretely relates to an energy -conserving ultrapure water equipment, including water purification equipment including front -end treatment device, purification treatment device and pure water flushing device, front -end treatment device includes first ultrafiltration membrane filter element, second ultrafiltration membrane filter element, scale -inhibiting carbon filter, micro -filter and RO membrane filter element that communicate in proper order, tap water water inlet on the shell is connected with the water inlet end of first ultrafiltration membrane filter element and the water inlet end of second ultrafiltration membrane filter element respectively, and purification treatment device includes sterilization system, purification column and folding filter element that communicate in proper order, the water outlet end of RO membrane filter element is connected with the water inlet end of sterilization system, and the water outlet end of folding filter element is connected with pure water water outlet on the shell, and pure water flushing device includes pressure vessel, the water inlet end of pressure vessel is connected with the water outlet end of sterilization system, and the water outlet end of pressure vessel is connected with the water inlet end of RO membrane filter element, and the scheme energy -conserving environmental protection, stable operation, maintenance is simple.

Description

Technical Field

[0001] This utility model belongs to the technical field of ultrapure water equipment, and more specifically, it relates to an energy-saving ultrapure water equipment. Background Technology

[0002] With the development of science and technology and the improvement of industrial standards, ultrapure water is increasingly widely used in laboratory analysis, medical testing, semiconductor manufacturing, optoelectronics, cosmetics production, and food processing, and the requirements for water quality are becoming increasingly stringent. Therefore, various types of ultrapure water equipment have become one of the indispensable core equipment in these fields.

[0003] Currently, most ultrapure water equipment on the market typically employs a water purification process mainly consisting of "three-stage pretreatment + reverse osmosis (RO) membrane + ion exchange / purification". Among them, the pretreatment system usually adopts a three-stage filtration structure composed of granular activated carbon, compressed activated carbon, and PP cotton filter cartridges. It is mainly used to remove suspended solids, residual chlorine, organic matter, and large particulate impurities from tap water to protect the safe operation of the subsequent key component - the reverse osmosis membrane (RO membrane).

[0004] However, the existing traditional three-stage filtration method has many drawbacks: First, PP cotton and carbon filter media are disposable consumables with limited filtration accuracy and are easily clogged by contaminants, resulting in a short actual service life, generally only 2 to 3 months, requiring frequent replacement, leading to high operating costs and a large workload for maintenance; Second, if users fail to replace the ineffective pre-filter in time, it will directly cause contamination or clogging of the RO membrane inlet, seriously affecting its desalination efficiency and service life; In addition, after long-term shutdown or after water production is completed, a large amount of concentrate remains on the surface and in the channels of the RO membrane, containing calcium and magnesium ions, heavy metals, bacteria and other organic and inorganic contaminants. If it is not flushed out in time, it is very easy for microorganisms to grow and form scale, further accelerating the performance degradation of the RO membrane.

[0005] More importantly, existing equipment generally only has the function of briefly rinsing with raw water when it is turned on, and lacks an automatic rinsing mechanism after water production is completed. In particular, when the equipment is full and shut down, the system stops operating completely, and no water flows through the RO membrane, causing pollutants to remain on the membrane surface for a long time and cannot be effectively cleaned. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides an energy-saving ultrapure water device to solve the issues of short filter life, easy RO membrane clogging, and incomplete rinsing in the prior art.

[0007] The technical solution adopted in this utility model is as follows:

[0008] An energy-saving ultrapure water device includes a housing and a water purification device disposed within the housing, wherein the water purification device includes a pretreatment device, a purification device, and a pure water rinsing device.

[0009] The pretreatment device includes a first ultrafiltration membrane filter element, a second ultrafiltration membrane filter element, a scale inhibitor carbon filter, a micro filter and an RO membrane filter element connected in sequence by pipelines.

[0010] The tap water inlet on the outer shell is connected to the water inlet of the first ultrafiltration membrane filter element and the water inlet of the second ultrafiltration membrane filter element respectively through pipelines;

[0011] The purification device includes a sterilization system, a purification column, and a pleated filter cartridge connected in sequence by pipelines;

[0012] The purified water outlet of the RO membrane filter element is connected to the inlet of the sterilization system, and the outlet of the pleated filter element is connected to the pure water outlet on the outer shell.

[0013] The pure water rinsing device includes a pressure vessel;

[0014] The inlet of the pressure vessel is connected to the outlet of the sterilization system via a pipeline, and the outlet of the pressure vessel is connected to the inlet of the RO membrane filter element via a pipeline.

[0015] Furthermore, the pre-processing device also includes a booster pump, a low-pressure switch, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a manifold.

[0016] The tap water inlet is connected to the first ultrafiltration membrane filter element and the second ultrafiltration membrane filter element by a main water inlet pipe, a first branch water inlet pipe and a second branch water inlet pipe;

[0017] The inlet end of the main water inlet pipe is connected to the tap water inlet. The booster pump is installed on the main water inlet pipe. The outlet end of the main water inlet pipe is connected to the inlet ends of the first branch water inlet pipe and the second branch water inlet pipe, respectively. The outlet ends of the first branch water inlet pipe and the second branch water inlet pipe are connected to the inlet ends of the first ultrafiltration membrane filter element and the second ultrafiltration membrane filter element, respectively.

[0018] The low-pressure switch and the first solenoid valve are connected in sequence to the first branch water inlet pipe via pipelines;

[0019] The third solenoid valve is connected to the second branch water inlet pipe;

[0020] The purified water outlet of the first ultrafiltration membrane filter element and the purified water outlet of the second ultrafiltration membrane filter element are connected to the inlet of the scale inhibitor carbon filter through a manifold, and the second solenoid valve is installed on the manifold.

[0021] Furthermore, the purification treatment device also includes a flow meter, a first water quality meter, a high-pressure switch, and a second water quality meter;

[0022] The flow meter and the first water quality meter are sequentially installed on the pipeline between the RO membrane filter and the sterilization system.

[0023] The high-pressure switch and the second water quality meter are sequentially installed on the pipeline between the pleated filter element and the pure water outlet.

[0024] Furthermore, the pure water rinsing device also includes an eighth solenoid valve and a ninth solenoid valve;

[0025] The ninth solenoid valve is installed on the pipeline between the sterilization system and the pressure vessel;

[0026] The eighth solenoid valve is installed on the pipeline between the pressure vessel and the RO membrane filter element.

[0027] Furthermore, it also includes a concentrate discharge device, which includes a first row of concentrate pipes, a second row of concentrate pipes, a third row of concentrate pipes, a fourth row of concentrate pipes, a fourth solenoid valve, a fifth solenoid valve, and a tenth solenoid valve.

[0028] The first row of concentrate pipes connects the concentrate outlet end of the first ultrafiltration membrane filter element and the concentrate outlet on the outer shell, and the fourth solenoid valve is installed on the first row of concentrate pipes;

[0029] The second row of concentrate pipes connects the concentrate outlet end of the second ultrafiltration membrane filter element and the concentrate outlet on the outer shell, and the tenth solenoid valve is installed on the second row of concentrate pipes;

[0030] The third row of concentrate pipes connects the concentrate outlet of the RO membrane filter element and the concentrate outlet on the outer shell, and the fifth solenoid valve is installed on the third row of concentrate pipes.

[0031] The fourth row of concentrate pipes connects the concentrate outlet of the purification column to the concentrate outlet on the outer shell.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. This utility model adopts a dual ultrafiltration membrane with a first ultrafiltration membrane filter element and a second ultrafiltration membrane filter element to replace the traditional three-stage filtration of PP cotton + activated carbon. It has higher filtration accuracy, stronger anti-fouling ability, and is equipped with an alternating backwashing mechanism to effectively prevent membrane surface fouling. The service life has been measured and the frequency of consumable replacement and maintenance costs have been greatly reduced.

[0034] 2. A pure water flushing device is introduced, using a pressure vessel in conjunction with the eighth and ninth solenoid valves. When each water production is completed and the water tank is full, the pure water temporarily stored in the pressure vessel is automatically used to back-flush the RO membrane. This avoids the secondary introduction of impurities such as calcium and magnesium ions and chloride ions during the flushing process, significantly reducing the risk of scale formation and microbial growth inside the membrane, and extending the service life of the RO membrane.

[0035] 3. Through the coordinated action of the first, third, fourth, and tenth solenoid valves, alternating reverse flushing between the two ultrafiltration membranes (i.e., one membrane filters water while the other discharges wastewater) is achieved. This method can complete the cleaning using the raw water pressure without additional power, making it energy-efficient and efficient. It can be started periodically or as needed, effectively alleviating minor blockages caused by long-term operation and maintaining a stable flow rate.

[0036] 4. The complex structure of the traditional "manual regulating valve + normally closed flushing valve" is replaced with a semi-open, semi-closed wastewater ratio solenoid valve (the fifth solenoid valve), which can automatically control the RO membrane concentrate discharge flow rate according to a preset ratio. It automatically opens during water production and fully opens during flushing, eliminating the risk of RO membrane blockage caused by human error in closing the valve, simplifying the operation process and improving system reliability. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of an energy-saving ultrapure water equipment according to this utility model.

[0038] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0039] 1. Tap water inlet; 2. Pure water outlet; 3. Concentrated water outlet; 4. First ultrafiltration membrane filter element; 5. Second ultrafiltration membrane filter element; 6. Scale inhibitor carbon filter; 7. Micro filter; 8. RO membrane filter element; 9. Booster pump; 10. Low-pressure switch; 11. First solenoid valve; 12. Second solenoid valve; 13. Third solenoid valve; 14. Manifold pipe; 15. Sterilization system; 16. Purification column; 17. Pleated filter element; 18. Flow meter; 19. First water quality meter; 20. High-pressure switch; 21. Second water quality meter; 22. Pressure vessel; 23. Eighth solenoid valve; 24. Ninth solenoid valve; 25. First concentrated water pipe; 26. Second concentrated water pipe; 27. Third concentrated water pipe; 28. Fourth concentrated water pipe; 29. ​​Fifth solenoid valve; 30. Tenth solenoid valve; 31. Pressure relief valve; 32. Fifth concentrated water pipe; 33. First check valve; 34. Second check valve; 35. Third check valve; 36. Fourth check valve; 37. Fifth check valve; 38. Detailed Implementation

[0040] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0041] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] Example 1:

[0044] As attached Figure 1 As shown:

[0045] This utility model provides an energy-saving ultrapure water equipment, including a shell and a water purification device installed inside the shell. The water purification device includes a pre-treatment device, a purification treatment device, and a pure water rinsing device.

[0046] The pretreatment device includes a first ultrafiltration membrane filter element 4, a second ultrafiltration membrane filter element 5, a scale inhibitor carbon filter 6, a micro filter 7 and an RO membrane filter element 8 connected in sequence by pipelines.

[0047] The tap water inlet 1 on the outer shell is connected to the water inlet of the first ultrafiltration membrane filter element 4 and the water inlet of the second ultrafiltration membrane filter element 5 respectively through pipelines.

[0048] The purification device includes a sterilization system 15, a purification column 16, and a pleated filter element 17 connected in sequence by pipelines.

[0049] The purified water outlet of the RO membrane filter 8 is connected to the inlet of the sterilization system 15, and the outlet of the folded filter 17 is connected to the pure water outlet 2 on the outer shell.

[0050] The pure water rinsing device includes a pressure vessel 22;

[0051] The inlet of the pressure vessel 22 is connected to the outlet of the sterilization system 15 via a pipeline, and the outlet of the pressure vessel 22 is connected to the inlet of the RO membrane filter element 8 via a pipeline.

[0052] In this embodiment, the first ultrafiltration membrane filter element 4 and the second ultrafiltration membrane filter element 5 are backwashed and cleaned by alternating flushing, which effectively alleviates and avoids clogging of the two ultrafiltration membranes, improves the filtration effect, and extends their service life. The process of rinsing the RO membrane filter element 8 with pure water extends the service life of consumables and significantly improves the filtration effect.

[0053] The sterilization system 15 employs a UV sterilization system, which uses ultraviolet light to destroy the DNA / RNA of microorganisms, rendering them inactive. It boasts strong bactericidal power, short contact time, simple equipment, and convenient operation and management, and the treated water does not produce secondary pollution. The scale-inhibiting carbon filter 6 filters residual chlorine, while the microfilter 7 uses a 5-micron precision microfilter to filter and intercept carbon powder impurities. The purification column 16 (ion exchange resin) is used to deeply remove residual trace ions from the UV-treated water. The pleated filter cartridge 17 uses a 0.22μm microfilter to remove tiny resin particles that may detach from the purification column 16, ensuring that the ultrapure water particulate matter index meets standards.

[0054] As a preferred embodiment, the pre-processing device further includes a booster pump 9, a low-pressure switch 10, a first solenoid valve 11, a second solenoid valve 12, a third solenoid valve 13, and a manifold 14.

[0055] The main water inlet pipe, the first branch water inlet pipe, and the second branch water inlet pipe are connected between the tap water inlet 1, the first ultrafiltration membrane filter element 4, and the second ultrafiltration membrane filter element 5.

[0056] The inlet end of the main water inlet pipe is connected to the tap water inlet 1. The booster pump 9 is installed on the main water inlet pipe. The outlet end of the main water inlet pipe is connected to the inlet end of the first branch water inlet pipe and the inlet end of the second branch water inlet pipe respectively. The outlet ends of the first branch water inlet pipe and the second branch water inlet pipe are connected to the inlet ends of the first ultrafiltration membrane filter element 4 and the second ultrafiltration membrane filter element 5 respectively.

[0057] The low-pressure switch 10 and the first solenoid valve 11 are connected in sequence to the first branch water inlet pipe through pipelines;

[0058] The third solenoid valve 13 is connected to the second branch water inlet pipe;

[0059] The purified water outlet of the first ultrafiltration membrane filter element 4 and the purified water outlet of the second ultrafiltration membrane filter element 5 are connected to the inlet of the scale inhibitor carbon filter 6 through the manifold 14, and the second solenoid valve 12 is installed on the manifold 14.

[0060] In this embodiment, the booster pump 9 is used to provide sufficient pressure to drive water flow through all filtration units, especially the RO membrane. The low-pressure switch 10 is used to monitor the inlet water pressure. When the raw water pressure is insufficient (<0.2MPa), the circuit is disconnected, triggering the water shortage protection to prevent the pump from running dry and being damaged.

[0061] As a preferred embodiment, the purification treatment device further includes a flow meter 18, a first water quality meter 19, a high-pressure switch 20, and a second water quality meter 21;

[0062] The flow meter 18 and the first water quality meter 19 are sequentially installed on the pipeline between the RO membrane filter 8 and the sterilization system 15.

[0063] The high-pressure switch 20 and the second water quality meter 21 are sequentially installed on the pipeline between the pleated filter element 17 and the pure water outlet 2.

[0064] In this embodiment, flow meter 18 is used to monitor the flow rate of the RO membrane permeate. High-pressure switch 20 is used to monitor the pressure at the pure water outlet 2. When the pressure is too high (>0.3MPa, indicating that the downstream water tank is full), the circuit is disconnected, triggering a full-water shutdown, and the system stops producing water and enters flushing mode. Specifically, high-pressure switch 20 detects the pressure value at the pure water outlet 2. When the pressure reaches the set value, the system stops. Since the pure water outlet 2 is connected to a water tank, high-pressure switch 20 and float switch work together to control the system, stopping when the water level reaches full. High-pressure switch 20 realizes automatic start / stop and full-water protection of the system. First water quality meter 19 is installed after the RO membrane to monitor the conductivity of the RO water (reflecting the desalination rate) online. Second water quality meter 21 is installed before the final outlet to monitor the resistivity of the ultrapure water (18.25 MΩ·cm) online. Real-time online water quality monitoring visually displays changes in water quality, facilitating timely judgment of system status and consumable lifespan.

[0065] As a preferred embodiment, the pure water rinsing device further includes an eighth solenoid valve 23 and a ninth solenoid valve 24;

[0066] The ninth solenoid valve 24 is installed on the pipeline between the sterilization system 15 and the pressure vessel 22;

[0067] The eighth solenoid valve 23 is installed on the pipeline between the pressure vessel 22 and the RO membrane filter element 8.

[0068] In this embodiment, pressure vessel 22 serves as a pressurized water storage tank for storing a portion of the pure water produced after treatment by the RO membrane and UV sterilization system 15. The ninth solenoid valve 24 (normally closed) is opened during water production to allow some pure water to flow into pressure vessel 22 for storage. The eighth solenoid valve 23 (normally closed) is opened in the flushing mode after the system is full, allowing pure water in pressure vessel 22 to flow back into the RO membrane inlet under system pressure.

[0069] During flushing, pure water enters from the RO membrane inlet, flushing the membrane surface at low pressure and high flow rate, carrying away contaminants and discharging them from the concentrate outlet (via the fifth solenoid valve 30). This allows for shutdown flushing of the RO membrane using low-pollution pure water, with a flushing effect far superior to using raw water, greatly improving the maintenance conditions of the RO membrane and being key to extending its lifespan.

[0070] As a preferred embodiment, the system also includes a concentrate discharge device, which comprises a first concentrate pipe 25, a second concentrate pipe 26, a third concentrate pipe 27, a fourth concentrate pipe 28, a fourth solenoid valve 29, a fifth solenoid valve 30, and a tenth solenoid valve 31.

[0071] The first row of concentrate pipe 25 is connected between the concentrate outlet end of the first ultrafiltration membrane filter element 4 and the concentrate outlet 3 on the outer shell, and the fourth solenoid valve 29 is installed on the first row of concentrate pipe 25.

[0072] The second row of concentrate pipe 26 is connected between the concentrate outlet end of the second ultrafiltration membrane filter element 5 and the concentrate outlet 3 on the outer shell, and the tenth solenoid valve 31 is installed on the second row of concentrate pipe 26.

[0073] The third row of concentrate pipes 27 connects the concentrate outlet end of the RO membrane filter element 8 and the concentrate outlet 3 on the outer shell, and the fifth solenoid valve 30 is installed on the third row of concentrate pipes 27.

[0074] The fourth row of concentrate pipes 28 connects the concentrate outlet end of the purification column 16 and the concentrate outlet 3 on the outer shell.

[0075] Specifically, the fifth solenoid valve 30 is a wastewater ratio solenoid valve, which is a semi-open, semi-closed type solenoid valve. In the prior art, the discharge of concentrated water from the RO membrane filter element 8 typically uses a normally closed flushing valve and a manual valve for regulation, which is cumbersome. However, this solution uses a wastewater ratio solenoid valve to control the discharge of concentrated water from the RO membrane filter element 8, allowing for the selection of a pre-designed concentrated water discharge flow rate. This simplifies the existing manual adjustment process. When the RO membrane filter element 8 is flushed, the wastewater ratio solenoid valve is fully open, combining the concentrated water discharge regulation of the RO membrane filter element 8 into one unit. This simplifies manual adjustment of the concentrated water discharge volume and effectively avoids the problem of accidental valve closure leading to RO membrane blockage due to insufficient concentrated water discharge.

[0076] Specifically, the first solenoid valve 11 and the third solenoid valve 13 are normally open solenoid valves; the second solenoid valve 12, the fourth solenoid valve 29, the eighth solenoid valve 23, the ninth solenoid valve 24 and the tenth solenoid valve 31 are normally closed solenoid valves.

[0077] As a preferred embodiment, the concentrate discharge device further includes a fifth concentrate pipe 33 and a pressure relief valve 32. The fifth concentrate pipe 33 is connected between the concentrate outlet of the booster pump 9 and the concentrate outlet 3 on the outer casing. The first concentrate pipe 25, the second concentrate pipe 26, the third concentrate pipe 27 and the fourth concentrate pipe 28 are all connected to the fifth concentrate pipe 33 (the main concentrate pipeline), and the concentrate is discharged to the concentrate outlet 3 on the outer casing through the fifth concentrate pipe 33. The pressure relief valve 32 is installed on the fifth concentrate pipe 33.

[0078] In this embodiment, the pressure relief valve 32 on the fifth concentrated water pipe 33 is a protective pipeline for pressure relief after the high pressure switch 20 is damaged. Specifically, it is installed on the fifth concentrated water pipe 33 (the main concentrated water pipeline) as a safety device. When the high pressure switch 20 fails or other reasons cause the system pressure to rise abnormally, it will automatically open to relieve pressure and protect the pump, diaphragm housing, pipelines, etc. from damage.

[0079] As a preferred embodiment, the system also includes a check valve assembly, which comprises a first check valve 34, a second check valve 35, a third check valve 36, a fourth check valve 37, and a fifth check valve 38.

[0080] The first check valve 34 is installed on the fifth concentrate pipe 33; the second check valve 35 is installed on the fourth concentrate pipe 28; the third check valve 36 is installed on the pipe between the flow meter 18 and the first water quality meter 19; the fourth check valve 37 is installed on the pipe between the ninth solenoid valve 24 and the pressure vessel 22; and the fifth check valve 38 is installed on the pipe between the eighth solenoid valve 23 and the RO membrane filter element 8. The check valve assembly is used to prevent reverse flow of water, ensure a single flow direction, and maintain normal process flow.

[0081] This solution's energy-saving ultrapure water equipment can be used in laboratories and research fields, medical and health fields, semiconductor manufacturing and optoelectronic manufacturing, automobile battery replenishment water, cosmetics and food fields.

[0082] Controlled by a microcomputer box, the water production process is fully automatic and requires no human intervention. It also features multiple protection designs, including water shortage protection, full water shutdown, automatic cleaning, RO high-pressure shutdown protection, and a pressure relief valve (32), ensuring normal equipment operation.

[0083] Specifically, this equipment is also equipped with a microcomputer box intelligent control system. All operating processes and functions of this energy-saving ultrapure water equipment are centrally controlled and managed through a microcomputer box (or PLC controller, control motherboard). Controlled objects: The microcomputer box receives signals from various sensors and outputs commands to control the actions of all electrical components, including: energizing / de-energizing the first to tenth solenoid valves 31; starting and stopping the booster pump 9; and turning the UV lamps on and off in the sterilization system 15. It also includes sensor signal reading, real-time monitoring of the status signals of the low-pressure switch 10 and the high-pressure switch 20, and receiving data signals from the flow meter 18, the first water quality meter 19, and the second water quality meter 21.

[0084] The workflow of this solution is as follows:

[0085] S1, Start-up cleaning: Ultrafiltration membrane display shows backwashing.

[0086] S11, the first solenoid valve 11 and the fourth solenoid valve 29 are energized, and the raw water (tap water) enters the second ultrafiltration membrane filter element 5 through the third solenoid valve 13, and then flows out from the first ultrafiltration membrane filter element 4, thus rinsing the second ultrafiltration membrane filter element 5 and the first ultrafiltration membrane filter element 4 in sequence, and forming concentrated water. The concentrated water is discharged from the concentrated water outlet 3 on the outer shell through the fourth solenoid valve 29. After rinsing for 15 seconds, the first solenoid valve 11 and the fourth solenoid valve 29 are de-energized.

[0087] S12, the third solenoid valve 13 and the tenth solenoid valve 31 are energized, and the raw water (tap water) enters the first ultrafiltration membrane filter element 4 through the first solenoid valve 11, and then flows out from the second ultrafiltration membrane filter element 5. The first ultrafiltration membrane filter element 4 and the second ultrafiltration membrane filter element 5 are flushed in sequence, and concentrated water is formed. The concentrated water is discharged from the concentrated water outlet 3 on the outer shell through the tenth solenoid valve 31. After flushing for 15 seconds, the third solenoid valve 13 and the tenth solenoid valve 31 are de-energized.

[0088] S13, the second solenoid valve 12 and the fifth solenoid valve 30 are energized. Raw water (tap water) enters the first ultrafiltration membrane filter element 4 through the first solenoid valve 11. At the same time, raw water (tap water) enters the second ultrafiltration membrane filter element 5 through the third solenoid valve 13. The raw water that has been flushed by the first ultrafiltration membrane filter element 4 and the second ultrafiltration membrane filter element 5 flows through the collection pipe 14 and then through the second solenoid valve 12 to flush the scale inhibitor carbon filter 6, the micro filter 7 and the RO membrane filter element 8 in sequence. Finally, the concentrated water formed is discharged from the concentrated water outlet 3 on the outer shell through the fifth solenoid valve 30. After flushing for 15 seconds, the second solenoid valve 12 and the fifth solenoid valve 30 are de-energized.

[0089] S2, Water Production:

[0090] S21, when the pressure of the raw water (tap water) is greater than 0.2MPa, the low-pressure switch 10 is lifted (power is connected), and the equipment starts to produce water when the equipment is in a water shortage state (high-pressure switch 20 is on).

[0091] S22, the second solenoid valve 12 and the ninth solenoid valve 24 are energized, and the booster pump 9 and the sterilization system 15 are started. The raw water (tap water) enters the first ultrafiltration membrane filter element 4 through the first solenoid valve 11. At the same time, the raw water (tap water) enters the second ultrafiltration membrane filter element 5 through the third solenoid valve 13. The raw water enters the first ultrafiltration membrane filter element 4 and the second ultrafiltration membrane filter element 5 for filtration.

[0092] S23, after filtration, passes through the manifold 14 and then through the second solenoid valve 12, and then through the scale inhibitor carbon filter 6, micro filter 7 and RO membrane filter 8 for multi-stage filtration, and then through the sterilization system 15 for sterilization.

[0093] S24, the purified water formed after sterilization by the sterilization system 15 flows to the left sequentially to the purification column 16 and the pleated filter element 17 for final filtration, and finally flows into the pure water outlet 2 on the outer shell; on the other hand, it flows to the right through the ninth solenoid valve 24 into the pressure vessel 22 to store part of the pure water.

[0094] S25, the concentrated water generated in the RO membrane filter element 8 is discharged from the concentrated water outlet 3 on the outer shell through the fifth solenoid valve 30.

[0095] S3, Full Water Rinse: Indicates a full rinse.

[0096] S31, the high-pressure switch 20 is used to detect the pressure value of the pure water outlet 2 on the outer casing. When the pressure value detected by the high-pressure switch 20 is greater than 0.3MPa, it indicates that the water tank connected to the pure water outlet 2 on the outer casing is full of water, and the equipment stops producing water and enters the flushing mode.

[0097] S32, control the booster pump 9, sterilization system 15, second solenoid valve 12 and ninth solenoid valve 24 to close, and energize the fifth solenoid valve 30 and eighth solenoid valve 23. The pure water stored in the pressure vessel 22 flows into the RO membrane filter element 8 through the eighth solenoid valve 23 to flush the RO membrane filter element 8. The resulting concentrated water is discharged from the concentrated water outlet 3 on the outer shell through the fifth solenoid valve 30. This flushing process lasts for 10 seconds, and then the fifth solenoid valve 30 and the eighth solenoid valve 23 are de-energized.

[0098] S33, the first solenoid valve 11 and the fourth solenoid valve 29 are energized, and the raw water (tap water) enters the second ultrafiltration membrane filter element 5 through the third solenoid valve 13, and then flows out from the first ultrafiltration membrane filter element 4, thus rinsing the second ultrafiltration membrane filter element 5 and the first ultrafiltration membrane filter element 4 in sequence, forming concentrated water. The concentrated water is discharged from the concentrated water outlet 3 on the outer shell through the fourth solenoid valve 29. After rinsing for 10 seconds, the first solenoid valve 11 and the fourth solenoid valve 29 are de-energized.

[0099] S34, the third solenoid valve 13 and the tenth solenoid valve 31 are energized, and the raw water (tap water) enters the first ultrafiltration membrane filter element 4 through the first solenoid valve 11, and then flows out from the second ultrafiltration membrane filter element 5. The first ultrafiltration membrane filter element 4 and the second ultrafiltration membrane filter element 5 are flushed in sequence, and concentrated water is formed. The concentrated water is discharged from the concentrated water outlet 3 on the outer shell through the tenth solenoid valve 31. After flushing for 10 seconds, the third solenoid valve 13 and the tenth solenoid valve 31 are de-energized.

[0100] S4, Forced Flushing: Cleans only the first ultrafiltration membrane filter element 4 and the second ultrafiltration membrane filter element 5.

[0101] S41, the first solenoid valve 11 and the fourth solenoid valve 29 are energized, and the raw water (tap water) enters the second ultrafiltration membrane filter element 5 through the third solenoid valve 13, and then flows out from the first ultrafiltration membrane filter element 4, thus rinsing the second ultrafiltration membrane filter element 5 and the first ultrafiltration membrane filter element 4 in sequence, forming concentrated water. The concentrated water is discharged from the concentrated water outlet 3 on the outer shell through the fourth solenoid valve 29. After rinsing for 15 seconds, the first solenoid valve 11 and the fourth solenoid valve 29 are de-energized.

[0102] S42, the third solenoid valve 13 and the tenth solenoid valve 31 are energized, and the raw water (tap water) enters the first ultrafiltration membrane filter element 4 through the first solenoid valve 11, and then flows out from the second ultrafiltration membrane filter element 5. The first ultrafiltration membrane filter element 4 and the second ultrafiltration membrane filter element 5 are flushed in sequence, and concentrated water is formed. The concentrated water is discharged from the concentrated water outlet 3 on the outer shell through the tenth solenoid valve 31. After flushing for 15 seconds, the third solenoid valve 13 and the tenth solenoid valve 31 are de-energized.

[0103] S5, equipment runs with 2-hour interval flushing: backflushing is displayed.

[0104] S51, the first solenoid valve 11 and the fourth solenoid valve 29 are energized, and the raw water (tap water) enters the second ultrafiltration membrane filter element 5 through the third solenoid valve 13, and then flows out from the first ultrafiltration membrane filter element 4, thus rinsing the second ultrafiltration membrane filter element 5 and the first ultrafiltration membrane filter element 4 in sequence, and forming concentrated water. The concentrated water is discharged from the concentrated water outlet 3 on the outer shell through the fourth solenoid valve 29. After rinsing for 15 seconds, the first solenoid valve 11 and the fourth solenoid valve 29 are de-energized.

[0105] S52, the third solenoid valve 13 and the tenth solenoid valve 31 are energized, and the raw water (tap water) enters the first ultrafiltration membrane filter element 4 through the first solenoid valve 11, and then flows out from the second ultrafiltration membrane filter element 5. The first ultrafiltration membrane filter element 4 and the second ultrafiltration membrane filter element 5 are flushed in sequence, and concentrated water is formed. The concentrated water is discharged from the concentrated water outlet 3 on the outer shell through the tenth solenoid valve 31. After flushing for 15 seconds, the third solenoid valve 13 and the tenth solenoid valve 31 are de-energized.

[0106] The rinsing in step S5 is to prevent minor blockages and filtration caused by prolonged water production. As a pretreatment, rinsing with the original pressure of tap water is sufficient.

[0107] This solution uses a microcomputer box intelligent control system to automatically control the above processes, strictly following the preset program (S1 to S5) to automatically execute all steps such as start-up flushing, water production, full water flushing, forced flushing, and intermittent flushing. Furthermore, this equipment is also equipped with a display interface (such as LED indicator lights or LCD screen) and operation buttons (such as one-button start and forced flushing buttons) to display the equipment status (water production, full water, flushing, alarm, etc.) and to perform simple manual operations.

[0108] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An energy-saving ultrapure water device, comprising a housing and a water purification device disposed within the housing, characterized in that: The water purification equipment includes a pretreatment device, a purification device, and a pure water rinsing device; The pretreatment device includes a first ultrafiltration membrane filter element (4), a second ultrafiltration membrane filter element (5), a scale inhibitor carbon filter (6), a micro filter (7), and an RO membrane filter element (8) connected in sequence through pipelines. The tap water inlet (1) on the outer shell is connected to the water inlet of the first ultrafiltration membrane filter element (4) and the water inlet of the second ultrafiltration membrane filter element (5) respectively through pipelines; The purification device includes a sterilization system (15), a purification column (16), and a pleated filter element (17) connected in sequence by pipelines. The purified water outlet of the RO membrane filter (8) is connected to the inlet of the sterilization system (15), and the outlet of the folded filter (17) is connected to the pure water outlet (2) on the outer shell. The pure water rinsing device includes a pressure vessel (22); The inlet of the pressure vessel (22) is connected to the outlet of the sterilization system (15) through a pipeline, and the outlet of the pressure vessel (22) is connected to the inlet of the RO membrane filter (8) through a pipeline.

2. The energy-saving ultrapure water equipment as described in claim 1, characterized in that: The pre-processing device also includes a booster pump (9), a low-pressure switch (10), a first solenoid valve (11), a second solenoid valve (12), a third solenoid valve (13), and a manifold (14); The main water inlet pipe, the first branch water inlet pipe, and the second branch water inlet pipe are connected between the tap water inlet (1) and the first ultrafiltration membrane filter element (4) and the second ultrafiltration membrane filter element (5); The inlet end of the main water inlet pipe is connected to the tap water inlet (1). The booster pump (9) is installed on the main water inlet pipe. The outlet end of the main water inlet pipe is connected to the inlet end of the first branch water inlet pipe and the inlet end of the second branch water inlet pipe respectively. The outlet end of the first branch water inlet pipe and the outlet end of the second branch water inlet pipe are connected to the inlet end of the first ultrafiltration membrane filter element (4) and the inlet end of the second ultrafiltration membrane filter element (5) respectively. The low-pressure switch (10) and the first solenoid valve (11) are connected in sequence to the first branch water inlet pipe through pipelines; The third solenoid valve (13) is connected to the second branch water inlet pipe; The purified water outlet of the first ultrafiltration membrane filter element (4) and the purified water outlet of the second ultrafiltration membrane filter element (5) are connected to the inlet of the scale inhibitor carbon filter (6) through the manifold (14), and the second solenoid valve (12) is installed on the manifold (14).

3. The energy-saving ultrapure water equipment as described in claim 1, characterized in that: The purification treatment device also includes a flow meter (18), a first water quality meter (19), a high-pressure switch (20), and a second water quality meter (21); The flow meter (18) and the first water quality meter (19) are sequentially installed on the pipeline between the RO membrane filter (8) and the sterilization system (15); The high-pressure switch (20) and the second water quality meter (21) are sequentially installed on the pipeline between the pleated filter element (17) and the pure water outlet (2).

4. The energy-saving ultrapure water equipment as described in claim 1, characterized in that: The pure water rinsing device also includes an eighth solenoid valve (23) and a ninth solenoid valve (24); The ninth solenoid valve (24) is installed on the pipeline between the sterilization system (15) and the pressure vessel (22); The eighth solenoid valve (23) is installed on the pipeline between the pressure vessel (22) and the RO membrane filter element (8).

5. The energy-saving ultrapure water equipment as described in claim 1, characterized in that: It also includes a concentrated water discharge device, which includes a first row of concentrated water pipes (25), a second row of concentrated water pipes (26), a third row of concentrated water pipes (27), a fourth row of concentrated water pipes (28), a fourth solenoid valve (29), a fifth solenoid valve (30), and a tenth solenoid valve (31). The first row of concentrate pipes (25) is connected between the concentrate outlet end of the first ultrafiltration membrane filter element (4) and the concentrate outlet (3) on the outer shell, and the fourth solenoid valve (29) is installed on the first row of concentrate pipes (25); The second row of concentrate pipes (26) is connected between the concentrate outlet end of the second ultrafiltration membrane filter element (5) and the concentrate outlet (3) on the outer shell. The tenth solenoid valve (31) is installed on the second row of concentrate pipes (26). The third row of concentrate pipes (27) is connected between the concentrate outlet end of the RO membrane filter element (8) and the concentrate outlet (3) on the outer shell, and the fifth solenoid valve (30) is installed on the third row of concentrate pipes (27); The fourth row of concentrate pipes (28) is connected between the concentrate outlet of the purification column (16) and the concentrate outlet (3) on the outer shell.

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