Ultrapure water preparation system

Abstract

The utility model relates to the technical field of water treatment, and provides an ultrapure water preparation system which comprises a raw water tank, a raw water pump, a heat exchanger, a filtering device, a disc filter, an ultrafiltration device and an ultrafiltration water production tank which are sequentially connected through pipelines, the heat exchanger is connected with the filtering device through a pipeline and is connected with the raw water tank through the raw water pump, and the filtering device comprises a tank body; activated carbon is arranged in the tank body, and the ultrafiltration device is connected with the ultrafiltration water producing tank through a pipeline. According to the technical scheme, the problem that an ultrapure water preparation system with a good pretreatment effect is lacked in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, and in particular to an ultrapure water preparation system. Background Art

[0002] With the rapid development and progress of the economy, the water quality requirements for industrial use are becoming increasingly stringent. Ultrapure water is further processed from desalted water to remove gases, colloids, organic matter, bacteria, and small amounts of ions, ensuring that the produced water meets certain industrial water requirements. Ultrapure water is primarily used in the electronics, nuclear, pharmaceutical, ultra-high-pressure boiler, and high-insulation material production sectors. Existing ultrapure water preparation technology systems include water tanks, filter devices, disc filter devices, superfiltration devices, reverse osmosis systems, continuous electro-deionization devices, ultraviolet sterilizers, polishing mixed beds, and membrane filters. Unconsistent influent water temperature in existing systems can affect the system's pure water preparation efficiency and device lifespan, and continuous electro-deionization devices are prone to fouling and clogging. Utility Model Content

[0003] The utility model provides an ultrapure water preparation system, which solves the problem in the related art that there is a lack of an ultrapure water preparation system with good pretreatment effect.

[0004] The technical solution of the utility model is as follows:

[0005] An ultrapure water preparation system includes a raw water tank, a raw water pump, a heat exchanger, a filter device, a disc filter, an ultrafiltration device and an ultrafiltration water production tank connected in sequence by pipelines, the heat exchanger is connected to the filter device via a pipeline and is connected to the raw water tank via the raw water pump, the filter device includes a tank body, activated carbon is provided in the tank body, and the ultrafiltration device is connected to the ultrafiltration water production tank via a pipeline.

[0006] Optionally, it further comprises an RO unit and an EDI unit which are sequentially connected by pipelines, and the ultrafiltration water production tank is connected to the RO unit by pipeline.

[0007] Optionally, the RO unit includes a first-level booster pump, a first-level security filter, a first-level high-pressure pump, a first-level RO device, a first-level RO concentrated water tank, a first-level RO produced water tank, a second-level high-pressure pump, an RO flushing water pump, a second-level RO device, and a second-level RO produced water tank connected by pipelines. The ultrafiltration produced water tank is connected to the first-level security filter through the first-level booster pump, the first-level RO concentrated water tank is connected to the first-level RO device, the first-level RO produced water tank is connected to the first-level RO device and is connected to the second-level RO device through the second-level high-pressure pump, the two ends of the RO flushing water pump are respectively connected to the first-level RO produced water tank and the second-level RO device, and the second-level RO produced water tank is connected to the second-level RO device and to the EDI unit.

[0008] Optionally, a scale inhibitor and reducing agent mixer is provided on the pipeline between the first-stage booster pump and the first-stage safety filter.

[0009] Optionally, an ultrafiltration backwash pump is further included, and both ends of the ultrafiltration backwash pump are connected to the ultrafiltration device and the ultrafiltration water production tank.

[0010] Optionally, the EDI unit includes an EDI booster pump, a UV sterilizer, a precision filter, an EDI device, a nitrogen-sealed water tank and an ultrapure water supply pump connected in sequence through pipelines, and the EDI unit is connected to the secondary RO water production tank through the EDI booster pump.

[0011] Optionally, it further comprises a TOC remover, a polishing mixed bed and a terminal filter which are sequentially connected by pipelines, and the EDI unit is connected to the TOC remover via the ultrapure water supply pump.

[0012] Optionally, the concentrated water outlet of the secondary RO device is connected to the ultrafiltration water production tank through a first return line pipe, and the concentrated water outlet of the EDI device is connected to the ultrafiltration water production tank through a second return line pipe.

[0013] Optionally, the water inlet and outlet ends of the ultrafiltration device, the primary RO device, the secondary RO device and the EDI device are all provided with pressure detectors.

[0014] Optionally, a control unit is also included.

[0015] The working principle and beneficial effects of the utility model are as follows:

[0016] In the present invention, raw water in the raw water tank is pumped into a heat exchanger by a raw water pump. The heat exchanger is connected to a filter device via a pipeline and is also connected to the raw water tank via a raw water pump. The raw water is temperature-controlled in the heat exchanger to a suitable processing temperature. Subsequently, the raw water enters a filter device, which includes a tank containing activated carbon. The activated carbon can absorb some impurities and odors in the raw water, thereby performing a preliminary filtration of the raw water. The raw water that has undergone preliminary filtration then enters a disc filter to further remove suspended matter and particulate matter. The raw water then enters an ultrafiltration device, which utilizes the microporous filtration of the ultrafiltration membrane to remove colloids, large molecular organic matter, and the like from the water. Finally, the ultrafiltration-treated water enters an ultrafiltration water tank for storage.

[0017] The advantage is that the heat exchanger regulates the raw water temperature, ensuring that subsequent treatment processes are carried out at the appropriate temperature, improving treatment efficiency and effectiveness. The activated carbon in the filter effectively absorbs impurities and odors in the raw water, improving water quality and providing a good foundation for subsequent advanced treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0019] Figure 1 This is a schematic diagram of the structure of the utility model.

[0020] Figure 1: 1. Raw water tank, 2. Raw water pump, 3. Heat exchanger, 4. Filtration device, 5. Disc filter, 6. Ultrafiltration device, 7. Ultrafiltration product water tank, 8. Ultrafiltration backwash pump, 9. RO unit, 91. First-stage booster pump, 92. First-stage safety filter, 93. First-stage high-pressure pump, 94. First-stage RO device, 95. First-stage RO concentrate tank, 96. First-stage RO product water tank, 97. Second-stage high-pressure pump, 98. RO flushing water pump, 99. Second-stage RO device, 910. Second-stage RO product water tank, 10. EDI unit, 101. EDI booster pump, 102. UV sterilizer, 103. Precision filter, 104. EDI device, 105. Nitrogen-sealed water tank, 106. Ultrapure water supply pump, 11. TOC Remover, 12. Polishing mixed bed, 13. Terminal filter, 14. First return pipeline, 15. Second return pipeline. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0022] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0023] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0024] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] Reference Figure 1 , which is the first embodiment of the utility model, proposes an ultrapure water preparation system, including a raw water tank 1, a raw water pump 2, a heat exchanger 3, a filter device 4, a disc filter 5, an ultrafiltration device 6 and an ultrafiltration water production tank 7 connected in sequence by pipelines. The heat exchanger 3 is connected to the filter device 4 through a pipeline and is connected to the raw water tank 1 through the raw water pump 2. The filter device 4 includes a tank body, and the tank body is provided with activated carbon. The ultrafiltration device 6 is connected to the ultrafiltration water production tank 7 through a pipeline.

[0026] In this embodiment, raw water from the raw water tank 1 is pumped into the heat exchanger 3 by the raw water pump 2. The heat exchanger 3 is connected to the filter device 4 via a pipeline, and is also connected to the raw water tank 1 via the raw water pump 2. The raw water is temperature-controlled in the heat exchanger 3 to a suitable processing temperature. The raw water then enters the filter device 4, which comprises a tank containing activated carbon. The activated carbon absorbs some impurities and odors in the raw water, providing preliminary filtration. The initially filtered raw water then enters the disc filter 5 to further remove suspended matter and particulate matter. The raw water then enters the ultrafiltration device 6, which utilizes the microporous filtration of the ultrafiltration membrane to remove colloids, large organic molecules, and other substances from the water. Finally, the ultrafiltration-treated water enters the ultrafiltration product tank 7 for storage.

[0027] The advantage is that heat exchanger 3 regulates the temperature of the raw water, ensuring that subsequent treatment processes are carried out at the appropriate temperature, improving treatment efficiency and effectiveness. The activated carbon in filter device 4 effectively absorbs impurities and odors in the raw water, improving water quality and providing a good foundation for subsequent advanced treatment.

[0028] Furthermore, it also includes an RO unit 9 and an EDI unit 10 connected in sequence by pipelines, and an ultrafiltration water production tank 7 is connected to the RO unit 9 by pipeline.

[0029] Furthermore, the RO unit 9 includes a first-level booster pump 91, a first-level safety filter 92, a first-level high-pressure pump 93, a first-level RO device 94, a first-level RO concentrated water tank 95, a first-level RO produced water tank 96, a second-level high-pressure pump 97, an RO flushing water pump 98, a second-level RO device 99, and a second-level RO produced water tank 910 connected by pipelines. The ultrafiltration produced water tank 7 is connected to the first-level safety filter 92 through the first-level booster pump 91, the first-level RO concentrated water tank 95 is connected to the first-level RO device 94, the first-level RO produced water tank 96 is connected to the first-level RO device 94 and is connected to the second-level RO device 99 through the second-level high-pressure pump 97, the two ends of the RO flushing water pump 98 are respectively connected to the first-level RO produced water tank 96 and the second-level RO device 99, the second-level RO produced water tank 910 is connected to the second-level RO device 99 and is connected to the EDI unit 10.

[0030] In this embodiment, the water in the ultrafiltration product water tank 7 is piped to the RO unit 9 for further purification. Within the RO unit 9, the water in the ultrafiltration product water tank 7 is pressurized by a primary booster pump 91 and then enters a primary safety filter 92 for preliminary filtration to remove impurities such as suspended solids and particulate matter. The water is then pressurized by a primary high-pressure pump 93 and enters a primary RO unit 94. The primary RO unit 94 removes most dissolved salts and organic matter through reverse osmosis. The concentrate enters a primary RO concentrate tank 95, while the product water enters a primary RO product water tank 96. The water in the primary RO product water tank 96 is pressurized again by a secondary high-pressure pump 97 and enters a secondary RO unit 99 for secondary reverse osmosis treatment to further remove residual impurities and ions. An RO flushing pump 98 is connected to the primary RO product water tank 96 and the secondary RO unit 99, respectively, to flush the RO units when needed to ensure their proper operation. The product water from the secondary RO unit 99 enters a secondary RO product water tank 910 and then enters the EDI unit 10 for advanced treatment.

[0031] Furthermore, a scale inhibitor and reducing agent mixer is provided on the pipeline between the first-stage booster pump 91 and the first-stage safety filter 92 .

[0032] In this embodiment, a scale inhibitor and reducing agent mixer is installed in the pipeline between the primary booster pump 91 and the primary safety filter 92. When water passes through this mixer, the scale inhibitor prevents calcium and magnesium ions in the water from forming scale, preventing scale from depositing in subsequent equipment and pipelines, thereby protecting the normal operation of the equipment and extending its service life. The reducing agent removes oxidants from the water, preventing them from damaging subsequent treatment equipment and membrane modules.

[0033] The advantage is that by setting up a scale inhibitor and reducing agent mixer, the formation of scale can be effectively prevented, the maintenance cost of the equipment can be reduced, and the subsequent processing equipment and membrane components can be protected, ensuring the stable operation of the entire system.

[0034] Furthermore, it also includes an ultrafiltration backwash pump 8, and both ends of the ultrafiltration backwash pump 8 are connected to the ultrafiltration device 6 and the ultrafiltration water production tank 7.

[0035] In this embodiment, the two ends of the ultrafiltration backwash pump 8 are respectively connected to the ultrafiltration device 6 and the ultrafiltration water tank 7. After the ultrafiltration device 6 has been running for a period of time, the ultrafiltration backwash pump 8 is started to reversely transport water in the ultrafiltration water tank 7 to the ultrafiltration device 6 to flush the ultrafiltration membrane, remove impurities and contaminants attached to the surface of the ultrafiltration membrane, and restore the filtration performance of the ultrafiltration membrane.

[0036] The advantage is that regular backwashing of the ultrafiltration device 6 can promptly remove impurities on the surface of the ultrafiltration membrane, maintain the filtration efficiency of the ultrafiltration device 6, extend the service life of the ultrafiltration membrane, and reduce the operating cost of the equipment.

[0037] Furthermore, the EDI unit 10 includes an EDI booster pump 101, a UV sterilizer 102, a precision filter 103, an EDI device 104, a nitrogen-sealed water tank 105 and an ultrapure water supply pump 106, which are sequentially connected by pipelines. The EDI unit 10 is connected to the secondary RO water production tank 910 through the EDI booster pump 101.

[0038] In this embodiment, the EDI unit 10 includes an EDI booster pump 101, a UV sterilizer 102, a precision filter 103, an EDI device 104, a nitrogen-sealed water tank 105, and an ultrapure water supply pump 106, which are connected in sequence through pipelines. The EDI unit 10 is connected to the secondary RO water production tank 910 via the EDI booster pump 101, and water in the secondary RO water production tank 910 is pumped into the EDI unit 10. The water is first pressurized by the EDI booster pump 101 and then enters the UV sterilizer 102. The UV sterilizer 102 uses ultraviolet radiation to kill bacteria and viruses in the water, thereby achieving a sterilization and disinfection effect. The water then enters the precision filter 103 to further remove tiny particles and impurities in the water. Next, the water enters the EDI device 104, which deeply removes ions in the water through electrodialysis and ion exchange, thereby achieving a higher level of water purity. Finally, the treated water enters the nitrogen-sealed water tank 105 for storage, and the ultrapure water supply pump 106 delivers the water to subsequent water use points as needed.

[0039] The advantage is that the UV sterilizer 102 and the precision filter 103 can effectively kill bacteria and viruses in the water, remove tiny particles and impurities, and improve the quality of water entering the EDI device 104, thereby increasing the service life of the EDI device 104, reducing water treatment costs, and ensuring that the output water meets the standards of ultrapure water.

[0040] Furthermore, it also includes a TOC remover 11 , a polishing mixed bed 12 and a terminal filter 13 which are sequentially connected by pipelines. The EDI unit 10 is connected to the TOC remover 11 via an ultrapure water supply pump 106 .

[0041] In this embodiment, water treated by the EDI unit 10 flows through an ultrapure water supply pump 106 into a TOC remover 11. Using specialized adsorbents or oxidation technology, the TOC remover 11 removes decomposed high-molecular organic matter from the water, reducing its TOC content. The water then enters a polishing mixed bed 12, where ion exchange resins further remove minute impurities and ions, improving its purity and stability. Finally, the water passes through a terminal filter 13 for final filtration, removing any remaining particles and impurities, resulting in high-quality ultrapure water.

[0042] The advantage is that the synergistic effect of the TOC remover 11, the polishing mixed bed 12 and the terminal filter 13 can further improve the water quality of the produced water, ensure the purity, stability and reliability of ultrapure water, and meet the application occasions with extremely high water quality requirements.

[0043] Furthermore, the concentrated water outlet of the secondary RO device 99 is connected to the ultrafiltration water production tank 7 through the first return pipeline 14 , and the concentrated water outlet of the EDI device 104 is connected to the ultrafiltration water production tank 7 through the second return pipeline 15 .

[0044] In this embodiment, the brine outlet of the secondary RO unit 99 is connected to the ultrafiltration water tank 7 via a first return line 14, and the brine outlet of the EDI unit 104 is connected to the ultrafiltration water tank 7 via a second return line 15. In this way, the brine produced by the secondary RO unit 99 and the EDI unit 104 can flow back to the ultrafiltration water tank 7 via the return line for further treatment.

[0045] The advantage is that the concentrated water is returned to the ultrafiltration water production tank 7, realizing the recycling of water resources, reducing the pollution of sewage discharge to the environment, and being beneficial to environmental protection. At the same time, by treating the concentrated water again, the utilization rate of water resources can be improved and the water treatment cost can be reduced.

[0046] Furthermore, the ultrafiltration device 6, the primary RO device 94, the secondary RO device 99 and the EDI device 104 are all provided with pressure detectors at the water inlet and outlet ends.

[0047] In this embodiment, pressure detectors are installed at the water inlet and outlet of the ultrafiltration unit 6, the primary RO unit 94, the secondary RO unit 99, and the EDI unit 104. These pressure detectors monitor pressure changes at the inlet and outlet of each unit in real time and transmit the pressure data to the control system. By analyzing this pressure data, the operating status of each unit can be promptly determined, such as whether there is blockage or abnormal pressure.

[0048] The advantage is that real-time monitoring by the pressure detector allows timely understanding of the equipment's operating status and accurate determination of the need for cleaning or maintenance, thereby maintaining stable equipment operation and improving water production efficiency. This avoids problems such as water quality degradation and production interruptions caused by equipment failure or untimely cleaning.

[0049] Furthermore, it also includes a control unit.

[0050] In this embodiment, a control unit is provided. This control unit is connected to various devices and sensors in the ultrapure water preparation system and is capable of collecting and monitoring system operating data in real time, including pressure, flow rate, temperature, and other data. Based on pre-set control strategies, the control unit automatically adjusts the operating parameters of each device, such as pump speed and valve opening, to ensure stable system operation. Furthermore, the control unit monitors the operating status of the devices and provides early warnings, enabling timely detection and resolution of potential faults.

[0051] The benefit is that the control unit allows for precise control and automated management of the ultrapure water preparation system, improving operational stability and reliability, reducing the need for manual intervention, and increasing production efficiency. Furthermore, through analysis and optimization of system operating data, system performance and energy savings can be further enhanced.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. An ultrapure water preparation system, characterized in that: The invention comprises a raw water tank (1), a raw water pump (2), a heat exchanger (3), a filter device (4), a disc filter (5), an ultrafiltration device (6) and an ultrafiltration water production tank (7) which are sequentially connected by pipelines, wherein the heat exchanger (3) is connected to the filter device (4) via a pipeline and is connected to the raw water tank (1) via the raw water pump (2), the filter device (4) comprises a tank body, and activated carbon is provided in the tank body, and the ultrafiltration device (6) is connected to the ultrafiltration water production tank (7) via a pipeline.

2. The ultrapure water preparation system according to claim 1, characterized in that: It also includes an RO unit (9) and an EDI unit (10) connected in sequence via pipelines, and the ultrafiltration water production tank (7) is connected to the RO unit (9) via pipelines.

3. The ultrapure water preparation system according to claim 2, characterized in that: The RO unit (9) includes a first-stage booster pump (91), a first-stage safety filter (92), a first-stage high-pressure pump (93), a first-stage RO device (94), a first-stage RO concentrated water tank (95), a first-stage RO production water tank (96), a second-stage high-pressure pump (97), an RO flushing water pump (98), a second-stage RO device (99), and a second-stage RO production water tank (910) connected by pipelines. The ultrafiltration production water tank (7) is connected to the first-stage safety filter (92) through the first-stage booster pump (91), the first-stage RO concentrated water tank (95) is connected to the first-stage RO device (94), the first-stage RO production water tank (96) is connected to the first-stage RO device (94) and is connected to the second-stage RO device (99) through the second-stage high-pressure pump (97), the two ends of the RO flushing water pump (98) are respectively connected to the first-stage RO production water tank (96) and the second-stage RO device (99), and the second-stage RO production water tank (910) is connected to the second-stage RO device (99) and is connected to the EDI unit (10).

4. The ultrapure water preparation system according to claim 3, characterized in that: A scale inhibitor and reducing agent mixer is provided on the pipeline between the first-stage booster pump (91) and the first-stage safety filter (92).

5. The ultrapure water preparation system according to claim 4, characterized in that: It also includes an ultrafiltration backwash pump (8), with both ends of the ultrafiltration backwash pump (8) connected to the ultrafiltration device (6) and the ultrafiltration water production tank (7).

6. The ultrapure water preparation system according to claim 5, characterized in that: The EDI unit (10) includes an EDI booster pump (101), a UV sterilizer (102), a precision filter (103), an EDI device (104), a nitrogen-sealed water tank (105), and an ultrapure water supply pump (106) which are sequentially connected by pipelines. The EDI unit (10) is connected to the secondary RO water production tank (910) via the EDI booster pump (101).

7. The ultrapure water preparation system according to claim 6, characterized in that: It also includes a TOC remover (11), a polishing mixed bed (12) and a terminal filter (13) which are sequentially connected by pipelines. The EDI unit (10) is connected to the TOC remover (11) via the ultrapure water supply pump (106).

8. The ultrapure water preparation system according to claim 7, characterized in that: The concentrated water outlet of the secondary RO device (99) is connected to the ultrafiltration water production tank (7) via a first return line pipe (14), and the concentrated water outlet of the EDI device (104) is connected to the ultrafiltration water production tank (7) via a second return line pipe (15).

9. The ultrapure water preparation system according to claim 8, characterized in that: The water inlet and outlet ends of the ultrafiltration device (6), the primary RO device (94), the secondary RO device (99), and the EDI device (104) are all provided with pressure detectors.

10. The ultrapure water preparation system according to claim 9, characterized in that: Also included is a control unit.

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