Purified water preparation system

Abstract

The utility model discloses a purified water preparation system and belongs to the technical field of pure water preparation. Comprising a raw water unit, a first-stage filtering unit, a softening unit, a second-stage filtering unit, a first heat exchange unit, a sterilization pipeline, a third-stage filtering unit, a first-stage reverse osmosis unit, a deionized water storage unit, a second heat exchange unit, a second-stage reverse osmosis unit, an EDI unit and a pure water storage unit. Impurities in a water body are removed through the three-stage filtering device, the purity of the water body is improved, the two-stage reverse osmosis filtering unit is arranged behind the three-stage filtering device, impurities such as salts, organic matter and microorganisms in the water body can be greatly removed, ions in the water are removed through cooperation of the rear end and the EDI unit, the purity of the water body and the output rate of pure water can be further improved, and therefore the water body purification effect is improved. According to the pure water preparation system, high-purity purified water can be produced with stable efficiency, so that the pure water preparation requirement of the medical industry is met.

Description

Technical Field

[0001] This utility model relates to the field of purified water technology, and in particular to a purified water preparation system. Background Technology

[0002] Purified water, also known as deionized water or deeply desalinated water, is high-quality water produced by carefully processing raw water that meets drinking water standards through distillation, ion exchange, reverse osmosis, or other advanced water treatment technologies. These treatment methods can efficiently remove dissolved solids, microorganisms, colloids, suspended solids, various ions, and organic matter from the water, thus giving purified water extremely high purity and stability.

[0003] In the pharmaceutical industry, purified water plays a crucial role, primarily in the following aspects: First, purified water is the cornerstone of ensuring drug quality and safety. Due to its rigorous and specialized treatment, purified water possesses impeccable high purity, free from any impurities that could contaminate drugs, such as microorganisms, colloids, and suspended solids. During the pharmaceutical process, purified water acts as a solvent or reaction medium, ensuring the purity and stability of drug components and effectively preventing drug degradation or impaired efficacy due to contamination. This is essential for ensuring the safety and effectiveness of medication for patients. Second, purified water plays an irreplaceable role in the cleaning and disinfection of pharmaceutical equipment. The cleanliness of the equipment directly affects drug quality; therefore, thorough cleaning with high-purity purified water is necessary to ensure no residue remains on the equipment surface, thus preventing secondary contamination. Furthermore, the high purity of purified water helps improve the aseptic condition of the equipment, providing strong support for aseptic drug production.

[0004] Therefore, the research and development and production of efficient and stable purified water equipment is of great significance for improving the overall level of the pharmaceutical industry and ensuring the safety of patients' medication. Utility Model Content

[0005] This application provides a purified water preparation system to improve the quality of pure water production and meet the needs of the medical and pharmaceutical industries.

[0006] This application provides a purified water preparation system, including:

[0007] Raw water unit;

[0008] A primary filtration unit is connected to the raw water unit;

[0009] The softening unit is connected to the primary filtration unit;

[0010] The secondary filtration unit is connected to the softening unit;

[0011] The first heat exchange unit is connected to the secondary filtration unit;

[0012] A sterilization pipeline connects the first heat exchange unit to the raw water unit.

[0013] The three-stage filtration unit is connected to the first heat exchange unit;

[0014] A first-stage reverse osmosis unit includes a first high-pressure pump and a first-stage reverse osmosis device. The first high-pressure pump connects the first-stage reverse osmosis device to the third-stage filtration unit. The concentrate outlet of the first-stage reverse osmosis device is connected to a first return water branch and a first discharge branch. The first return water branch is connected to the raw material tank.

[0015] The deionized water storage unit is connected to the product water outlet of the first-stage reverse osmosis unit.

[0016] The second heat exchange unit is connected to the deionized water storage unit;

[0017] The two-stage reverse osmosis unit includes a second high-pressure pump and a second-stage reverse osmosis device. The second high-pressure pump connects the second-stage reverse osmosis device to the second heat exchange unit. The concentrate outlet of the second-stage reverse osmosis device is connected to a second return water branch and a second discharge branch. The second return water branch is connected to the deionized water storage unit and the raw water unit.

[0018] The EDI unit is connected to the permeate outlet of the secondary reverse osmosis unit.

[0019] The pure water storage unit is connected to the EDI unit.

[0020] The beneficial effects of the above embodiments are as follows: a three-stage filtration device is configured at the front end of the system to remove impurities from the water during the water softening process, thereby improving the water purity; a two-stage reverse osmosis filtration unit is configured after the three-stage filtration device, which can greatly remove impurities such as salts, organic matter, and microorganisms from the water, further improving the water purity, and both reverse osmosis units have return water branches, which can improve the pure water production rate; the EDI unit at the back end removes ions from the water, which can further improve the water purity and pure water production rate; at the same time, a two-stage heat exchange unit is configured in the system to control the water temperature during the pure water preparation process, ensuring the system's operating temperature, thereby ensuring the pure water preparation efficiency and output quality. Therefore, this pure water preparation system can maintain stable and efficient production of high-purity purified water, thus meeting the pure water preparation needs of the medical industry.

[0021] Based on the above embodiments, the embodiments of this application can be further improved as follows:

[0022] In one embodiment of this application: the raw water unit includes the raw material tank, which is connected to raw water via an inlet pipe, and the inlet pipe has an electric valve. The beneficial effect of this step is that the configuration of the inlet pipe enables control of the raw water supplied to the raw material tank.

[0023] In one embodiment of this application: the softening unit includes a salt tank and a softener, wherein the softener is connected to both the primary filtration unit and the salt tank. The beneficial effect of this step is that the brine from the salt tank enters the softener, causing the resin in the softener to regenerate.

[0024] In one embodiment of this application: the first heat exchange unit includes: a first heat exchanger, a first steam branch, and a first cold water branch. The first heat exchanger is connected in series between the secondary filtration unit and the tertiary filtration unit. The first steam branch and the first cold water branch are connected to the heat exchange ports of the first heat exchanger. The beneficial effect of this step is that the first heat exchanger maintains the operating temperature of the entire system.

[0025] In one embodiment of this application: the second heat exchange unit includes: a second heat exchanger, a second steam branch, and a second cold water branch. The second heat exchanger is connected in series between the deionized water storage unit and the secondary reverse osmosis unit. The second steam branch and the second cold water branch are connected to the heat exchange ports of the second heat exchanger. The beneficial effect of this step is that the second heat exchanger maintains the operating temperature of the entire system.

[0026] In one embodiment of this application, it further includes a dosing unit, connected in pipeline to the second heat exchange unit and the secondary reverse osmosis device. The beneficial effect of this step is that the dosing unit controls the pH value of the water during preparation and ensures water quality safety. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0028] Figure 1 Schematic diagram of the structure and principle of the purified water preparation system;

[0029] Figure 2 This is a schematic diagram of the raw water unit structure;

[0030] Figure 3 This is a schematic diagram of the primary filtration unit structure;

[0031] Figure 4 This is a schematic diagram of a soft water unit structure;

[0032] Figure 5 This is a schematic diagram of a two-stage filtration unit.

[0033] Figure 6 This is a schematic diagram of the first heat exchange unit.

[0034] Figure 7 This is a schematic diagram of a three-stage filtration unit.

[0035] Figure 8 This is a schematic diagram of a first-stage reverse osmosis unit.

[0036] Figure 9 This is a schematic diagram of the deionized water storage unit structure;

[0037] Figure 10 This is a schematic diagram of the second heat exchange unit.

[0038] Figure 11 This is a schematic diagram of the drug delivery unit structure;

[0039] Figure 12 This is a schematic diagram of a two-stage reverse osmosis unit.

[0040] Figure 13 This is a schematic diagram of the EDI unit structure;

[0041] Figure 14 This is a pure water storage unit.

[0042] Among them, 1 is the raw water unit, 101 is the raw material tank, and 102 is the first water pump;

[0043] 2. Primary filtration unit;

[0044] 3 softening units, 301 salt tank, 302 softener;

[0045] 4-stage filtration unit, 401 activated carbon filter;

[0046] 5 First heat exchange unit, 501 First heat exchanger;

[0047] 6. Sterilization piping; 7. Three-stage filtration unit;

[0048] 8. First-stage reverse osmosis unit; 801. First high-pressure pump; 802. First-stage reverse osmosis device; 803. First return water branch; 804. First discharge branch.

[0049] 9. Deionized water storage unit, 901. Deionized water storage tank, 902. Second water pump, 903. Third water pump;

[0050] 10 Second heat exchange unit, 1001 Second heat exchanger;

[0051] 11 Secondary reverse osmosis unit, 1101 Second high-pressure pump, 1102 Secondary reverse osmosis device, 1103 Secondary return water branch, 1104 Secondary discharge branch;

[0052] 12 EDI units, 1201 EDI module;

[0053] 13 pure water storage units;

[0054] 14 dosing units, 1401 dosing device. Detailed Implementation

[0055] In this application, unless otherwise expressly specified and limited, the terms used should be interpreted broadly. For example, "connection" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. If electrical or electronic equipment is involved, it can also refer to electrical connection or communication signal connection, etc. For those skilled in the art, the specific meaning of different terms in this utility model can be understood according to the specific circumstances, and the scope of the specific meaning should be limited to achieving the function of this application.

[0056] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they should not be construed as limitations on the present invention.

[0057] like Figure 1 As shown, a purified water preparation system includes: a raw water unit 1, a primary filtration unit 2, a softening unit 3, a secondary filtration unit 4, a first heat exchange unit 5, a sterilization pipeline 6, a tertiary filtration unit 7, a primary reverse osmosis unit 8, a deionized water storage unit 9, a second heat exchange unit 10, a secondary reverse osmosis unit 11, an EDI unit 12, and a pure water storage unit 13.

[0058] In some embodiments of the present application, Figure 1-14As shown, the raw water unit 1 has a raw material tank 101 and a first water pump 102. The raw material tank 101 is connected to the first water pump 102. The first-stage filtration unit 2 is connected to the first water pump 102. The softening unit 3 is connected to the first-stage filtration unit 2. The second-stage filtration unit 4 is connected to the softening unit 3. The first heat exchange unit 5 is connected to the second-stage filtration unit 4. The third-stage filtration unit 7 is connected to the first heat exchange unit 5. The sterilization pipeline 6 connects the first heat exchange unit 5 to the raw water unit 1. The first-stage reverse osmosis unit 8 has a first high-pressure pump 801 and a first-stage reverse osmosis device 802. The first high-pressure pump 801 connects the first-stage reverse osmosis device 802 to the third-stage filtration unit 7. The concentrate outlet of the first-stage reverse osmosis device 802 is connected to the first return water branch 803 and the first discharge branch 804, respectively. The first return water branch 803 is connected to the raw material tank 101, the deionized water storage unit 9 is connected to the product water outlet of the first-stage reverse osmosis unit 802, the second heat exchange unit 10 is connected to the deionized water storage unit 9, the second-stage reverse osmosis unit 11 has a second high-pressure pump 1101 and a second-stage reverse osmosis unit 1102, the second high-pressure pump 1101 connects the second-stage reverse osmosis unit 1102 to the second heat exchange unit 10, the concentrate outlet of the second-stage reverse osmosis unit 1102 is connected to the second return water branch 1103 and the second discharge branch 1104 respectively, the second return water branch 1103 is connected to the deionized water storage unit 9 and the raw water unit 1, the EDI unit 12 is connected to the product water outlet of the second-stage reverse osmosis unit 1102, and the pure water storage unit 13 is connected to the EDI unit 12.

[0059] In some embodiments of the present application, Figure 2 As shown, the raw material tank 101 is connected to raw water via an inlet pipe. The inlet pipe has two branches. One branch is equipped with a manual ball valve, and the other branch is equipped with a pneumatic butterfly valve and an electric butterfly valve connected in series. The raw material tank 101 is also connected to a level transmitter, which is connected to a controller. The controller can be a PLC controller. When the liquid level is lower than the preset value, the electric butterfly valve opens, allowing raw water to flow into the raw material tank 101, thereby realizing the function of automatic liquid replenishment.

[0060] In some embodiments of the present application, Figure 3As shown, the primary filtration unit 2 has a multi-media filter, which is a commonly used device in this field. The first water pump 102 is a raw water pump, which is connected to the multi-media filter through a check valve, a manual ball valve, a flow meter, and a pressure transmitter. The multi-media filter serves as a pre-filtration unit before the softening unit 3. The filter media can effectively remove larger particulate impurities that may clog the membrane pores or affect the resin function, protecting subsequent treatment units, extending their service life, and improving overall treatment efficiency. The pressure transmitter is connected to the first water pump 102 and the electric butterfly valve in the inlet pipeline through a controller to achieve control signals. When the pressure value is higher than the set value, it indicates that the multi-media transmitter is blocked and needs to be shut down for maintenance. The controller controls the electric butterfly valve and the first water pump 102 to stop working according to the control signal.

[0061] In some embodiments of the present application, Figure 4 As shown, the softening unit 3 includes a brine tank 301 and a softener 302. The softener 302 is connected to both the primary filtration unit 2 and the brine tank 301. The water softener uses ion exchange resin to remove hardness minerals (such as calcium and magnesium) from the water. This process gradually depletes the resin's exchange capacity. To restore the resin's softening capacity, it needs to be regenerated periodically with salt. The brine solution flows through the resin, displacing calcium and magnesium ions and releasing sodium ions, allowing the resin to be used again to soften water. The raw water pipeline connected to the multi-media filter outlet is connected to the softener 302 via a branch equipped with a pneumatic butterfly valve, a manual ball valve, and a flow meter, which is then connected to the water jet nozzle of the brine tank 301. Another branch is directly connected to the softener 302.

[0062] In some embodiments of the present application, Figure 5 As shown, the secondary filtration unit 4 has an activated carbon filter 401. Activated carbon filtration can not only filter impurities in the water, but also remove residual chlorine from the water. The pipe connected to the outlet of the activated carbon filter 401 is also connected to a residual chlorine detector for detecting chlorine content.

[0063] In some embodiments of the present application, Figure 6As shown, the first heat exchange unit 5 includes: a first heat exchanger 501, a first steam branch, and a first cold water branch. The first heat exchanger 501 is connected in series between the secondary filtration unit 4 and the tertiary filtration unit 7. The first steam branch and the first cold water branch are connected to the heat exchange port of the first heat exchanger 501. The first heat exchanger 501 is connected to the tertiary filtration unit 7 through a temperature transmitter, a pneumatic butterfly valve, and a pressure transmitter. The first heat exchanger 501 maintains the operating temperature of the entire system. Specifically, the first heat exchanger 501 adopts a double tube sheet heat exchanger. The first heat exchange port of the first heat exchanger 501 is connected to two parallel branches through a temperature regulating valve. The first branch is connected to a pipeline with industrial steam through a pneumatic angle seat valve and is used to pour steam into the first heat exchanger 501. The other branch is connected to a chilled water drain pipe through a pneumatic angle seat valve. The second heat exchange port of the second heat exchanger 1001 is connected to two branches. The first branch is connected to a chilled water inlet pipe through a pneumatic angle seat valve. The second branch is connected to a parallel steam trap and a manual ball valve through a pneumatic angle seat valve to discharge the condensate generated by the steam.

[0064] In some embodiments of the present application, Figure 1 As shown, the sterilization pipeline 6 is connected to the outlet of the activated carbon filter 401 via a pneumatic butterfly valve. The other end of the sterilization pipeline 6 is connected to the raw material tank 101. The sterilization pipeline 6 can introduce heated high-temperature water into the raw material tank 101 to perform sterilization and rinsing operations on the raw material tank 101.

[0065] In some embodiments of the present application, Figure 7 As shown, the three-stage filtration unit 7 has a precision filter, which is a commonly used device in this field. The inlet of the precision filter is connected to the first heat exchanger 501, and the other end is connected to the first-stage reverse osmosis unit 8 through a pressure transmitter and a conductivity meter.

[0066] In some embodiments of the present application, Figure 8 As shown, the first-stage reverse osmosis unit 8 includes multiple parallel first-stage RO membrane reverse osmosis devices. The first high-pressure pump 801 is connected to the inlet of the first-stage RO membrane reverse osmosis device through a check valve, a manual butterfly valve, and a pressure transmitter. The product water outlet of the first-stage RO membrane reverse osmosis device is also connected to the deionized water storage unit 9 through a conductivity meter, a manual ball valve, a flow meter, and a pneumatic butterfly valve. The first return water branch 803 is connected to the raw material tank 101 through a pressure gauge, a manual ball valve, a flow meter, and a pneumatic butterfly valve. The first return water branch 803 is connected to the external discharge pipe through an electric butterfly valve.

[0067] In some embodiments of the present application, Figure 9As shown, the deionized water storage unit 9 has a deionized water storage tank 901. The deionized water storage unit 9 is connected to the product water outlet of the first-stage RO membrane reverse osmosis device through a fresh water pipeline. The outlet of the deionized water storage unit 9 is connected to the second heat exchange unit 10 through the second water pump 902. The outlet of the deionized water storage unit 9 is connected to the workshop water pipeline through the third water pump 903.

[0068] In some embodiments of the present application, Figure 10 As shown, the second heat exchange unit 10 includes: a second heat exchanger 1001, a second steam branch, and a second cold water branch. The second heat exchanger 1001 is connected in series between the deionized water storage unit 9 and the secondary reverse osmosis unit 11. The second steam branch and the second cold water branch are connected to the heat exchange port of the second heat exchanger 1001, and the operating temperature of the entire system is maintained through the second heat exchanger 1001. Specifically, the second heat exchanger 1001 is a shell-and-tube heat exchanger. The first heat exchange port of the second heat exchanger 1001 is connected to two parallel branches through a temperature regulating valve. The first branch is connected to a pipeline with industrial steam through a pneumatic angle seat valve and is used to pour steam into the second heat exchanger 1001. The other branch is connected to a chilled water drain pipe through a pneumatic angle seat valve. The second heat exchange port of the second heat exchanger 1001 is connected to two branches. The first branch is connected to a chilled water inlet pipe through a pneumatic angle seat valve. The second branch is connected to a parallel steam trap and a manual ball valve through a pneumatic angle seat valve to discharge the condensate generated by the steam.

[0069] In some embodiments of the present application, Figure 11 As shown, the purified water preparation system also includes a dosing unit 14, which is connected to the second heat exchange unit 10 and the secondary reverse osmosis unit 1102 via pipelines. Specifically, the dosing unit 14 includes a dosing device 1401, which is a conventional device in the art. The outlet of the dosing device 1401 is connected to the product water outlet pipe of the second heat exchanger 1001 via a pipeline. A pH meter is connected in the product water outlet pipe, and the pH meter is connected to the dosing device 1401 via a controller. The pH value of the prepared water is controlled by the dosing unit 14 to ensure water quality safety.

[0070] In some embodiments of the present application, Figure 12 As shown, the secondary reverse osmosis unit 1102 has a secondary RO membrane reverse osmosis unit. The concentrate outlet of the secondary RO membrane reverse osmosis unit has three branches. The first branch is connected to the external discharge pipeline through an electric butterfly valve and a manual butterfly valve. The second branch is connected to the deionized water storage tank 901 through a pneumatic butterfly valve. The third branch is connected to the raw material tank 101 through a pneumatic butterfly valve and a check valve.

[0071] In some embodiments of the present application, Figure 13As shown, the EDI unit 12 includes two parallel EDI modules 1201. EDI module 1201 (Electrodialysis) is a commonly used device in the art. It combines electrodialysis and ion exchange technologies, utilizing high voltage at both electrodes to move charged ions in the water, and employing ion exchange resin and selective resin membranes to accelerate ion removal. Specifically, EDI module 1201 is connected to the pure water storage unit 13 via a manual diaphragm valve, a conductivity meter, a flow meter, and a pneumatic diaphragm valve.

[0072] In some embodiments of the present application, Figure 14 As shown, the pure water storage unit 13 has a pure water tank 1301.

[0073] This purified water preparation system has the following advantages: A three-stage filtration system at the front end removes impurities from the water during softening, improving water purity and preventing impurities from affecting subsequent equipment. A two-stage reverse osmosis filtration unit following the three-stage filtration system effectively removes salts, organic matter, microorganisms, and other impurities, further improving water purity. Both reverse osmosis units have return water branches, increasing the pure water yield. The EDI unit 12 at the back end removes ions from the water, further improving water purity and the pure water production rate. Simultaneously, a two-stage heat exchange unit controls the water temperature during the pure water preparation process, maintaining a stable system operating temperature and ensuring both efficiency and quality. Therefore, this pure water preparation system can maintain stable and efficient production of high-purity purified water, thus meeting the pure water preparation needs of the medical industry.

[0074] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A purified water preparation system, characterized in that, include: Raw water unit; A primary filtration unit is connected to the raw water unit; The softening unit is connected to the primary filtration unit; The secondary filtration unit is connected to the softening unit; The first heat exchange unit is connected to the secondary filtration unit; A sterilization pipeline connects the first heat exchange unit to the raw water unit. The three-stage filtration unit is connected to the first heat exchange unit; A first-stage reverse osmosis unit includes a first high-pressure pump and a first-stage reverse osmosis device. The first high-pressure pump connects the first-stage reverse osmosis device to the third-stage filtration unit. The concentrate outlet of the first-stage reverse osmosis device is connected to a first return water branch and a first discharge branch. The first return water branch is connected to the raw material tank. The deionized water storage unit is connected to the product water outlet of the first-stage reverse osmosis unit. The second heat exchange unit is connected to the deionized water storage unit; The two-stage reverse osmosis unit includes a second high-pressure pump and a second-stage reverse osmosis device. The second high-pressure pump connects the second-stage reverse osmosis device to the second heat exchange unit. The concentrate outlet of the second-stage reverse osmosis device is connected to a second return water branch and a second discharge branch. The second return water branch is connected to the deionized water storage unit and the raw water unit. The EDI unit is connected to the permeate outlet of the secondary reverse osmosis unit. The pure water storage unit is connected to the EDI unit.

2. The purified water preparation system according to claim 1, characterized in that, The raw water unit includes the raw material tank, which is connected to raw water via an inlet pipe, and the inlet pipe has an electric valve.

3. The purified water preparation system according to claim 1, characterized in that, The softening unit includes a salt tank and a softener, wherein the softener is connected to the primary filtration unit and the salt tank, respectively.

4. The purified water preparation system according to claim 1, characterized in that, The first heat exchange unit includes: a first heat exchanger, a first steam branch, and a first cold water branch. The first heat exchanger is connected in series between the secondary filtration unit and the tertiary filtration unit. The first steam branch and the first cold water branch are connected to the heat exchange port of the first heat exchanger.

5. The purified water preparation system according to claim 1, characterized in that, The second heat exchange unit includes: a second heat exchanger, a second steam branch, and a second cold water branch. The second heat exchanger is connected in series between the deionized water storage unit and the secondary reverse osmosis unit. The second steam branch and the second cold water branch are connected to the heat exchange port of the second heat exchanger.

6. The purified water preparation system according to claim 1, characterized in that, Also includes: The dosing unit is connected to the pipeline between the second heat exchange unit and the secondary reverse osmosis unit.

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