Water for injection generating device and purified water dispensing system

Abstract

This application relates to the field of pharmaceutical technology, specifically to a water-for-injection generating device and a purified water distribution system. The main pipeline has an inlet end connected to the water supply pipeline of the purified water distribution system, and an outlet end connected to the return pipeline of the purified water distribution system. The branch pipeline assembly includes branch pipelines, and terminal ultrafiltration membrane modules and water-for-injection production valves, both installed on the branch pipelines. The terminal ultrafiltration membrane modules are located upstream of the water-for-injection production valve. The inlet and outlet ends of the branch pipelines are both connected to the main pipeline. The inlet end of the branch pipeline is located upstream of a first flow regulating valve, and the outlet end of the branch pipeline is located downstream of the first flow regulating valve. The purpose of this application is to address at least one technical problem mentioned in the background art by providing a water-for-injection generating device and a purified water distribution system.

Description

Technical Field

[0001] This application relates to the field of pharmaceutical technology, and more specifically, to a water-for-injection generating device and a purified water dispensing system. Background Technology

[0002] In pharmaceutical manufacturing, the same production workshop often requires both purified water and cryogenic water for injection. When the number of cryogenic water for injection usage points is small and the required flow rate is low, existing technologies typically require a separate water for injection distribution network system, including independent storage tanks, circulation pumps, pipelines, and sterilization facilities. While this conventional approach can meet the quality requirements of water for injection, it significantly increases the initial investment cost and subsequent operation and maintenance expenses. Summary of the Invention

[0003] The purpose of this application is to provide an apparatus for generating water for injection and a purified water distribution system to address at least one of the technical problems mentioned in the background art.

[0004] To achieve the above objectives, this application adopts the following technical solution: One aspect of this application provides a water-for-injection generating apparatus, including a main pipeline assembly and branch pipeline assemblies. The main pipeline assembly includes a main pipeline and a first flow regulating valve installed on the main pipeline. The inlet end of the main pipeline is used to connect to the water supply pipeline of a purified water distribution system, and the outlet end of the main pipeline is used to connect to the return water pipeline of the purified water distribution system. The branch piping assembly includes branch piping, and terminal ultrafiltration membrane modules and injection water product valves, both installed on the branch piping. The terminal ultrafiltration membrane modules are located upstream of the injection water product valves. The inlet and outlet of the branch pipe are both connected to the main pipe. The inlet of the branch pipe is located upstream of the first flow regulating valve, and the outlet of the branch pipe is located downstream of the first flow regulating valve.

[0005] Optionally, the main pipeline includes a main pipe section and a first U-shaped pipe section connected to each other, the first flow regulating valve is installed on the main pipe section, the first flow regulating valve is located upstream of the first U-shaped pipe section, and the outlet end of the branch pipeline is connected to the bottom end of the first U-shaped pipe section.

[0006] The beneficial effects of this technical solution are as follows: the setting of the first U-shaped tube section helps to maintain stable system pressure, allows the return fluid to smoothly merge with the fluid in the main pipeline, reduces the impact of turbulence on flow regulation, and further improves the reliability of the water for injection generation device provided in this application during long-term continuous operation.

[0007] Optionally, the branch pipe assembly further includes a backflow valve, and the outlet end of the branch pipe is connected to the bottom end of the first U-shaped pipe section through the backflow valve.

[0008] The beneficial effects of this technical solution are as follows: By installing a reflux valve between the outlet end of the branch pipeline and the bottom end of the first U-shaped tube, the on-demand on / off control of the reflux path of the branch pipeline is achieved. When there is no demand for water for injection, the reflux valve remains open, allowing the purified water or water for injection in the branch pipeline to flow back into the bottom end of the first U-shaped tube of the main pipeline through the reflux valve, maintaining the continuous circulation of the entire water for injection generation device and inhibiting the growth of microorganisms. When water for injection needs to be produced, the reflux valve can be closed and the water for injection product valve can be opened simultaneously, ensuring that all the water for injection produced by the terminal ultrafiltration membrane module is output through the water for injection product valve, making it less likely for the product water to backflow or mix into the reflux pipeline.

[0009] Optionally, the water-to-injection generating apparatus provided in this application further includes a drain pipeline assembly, which includes a drain pipeline and a drain valve installed on the drain pipeline. The inlet end of the drain valve is connected to the branch pipeline, and the inlet end of the drain valve is located upstream of the reflux valve.

[0010] The beneficial effects of this technical solution are as follows: When the water-to-injection generator switches from a no-demand mode to a production mode, the drain valve can be briefly opened to ensure stable operation and discharge any static stagnant water that may exist in the pipeline between the reflux valve and the drain valve. Then, the drain valve is closed and the water-to-injection production valve is opened, thereby reducing the risk of substandard water quality entering the initial production water when the water-to-injection production valve is opened. Simultaneously, during the long-term continuous operation of the water-to-injection generator, the drain valve can be periodically opened to flush the inlet side of the terminal ultrafiltration membrane module. The flushing water is discharged through the drain pipeline, which helps maintain the cleanliness of the inlet side of the terminal ultrafiltration membrane module and reduces the accumulation of contaminants inside the terminal ultrafiltration membrane module.

[0011] Optionally, the drainage pipeline assembly further includes a concentrate discharge pipeline and a concentrate discharge valve installed on the concentrate discharge pipeline, wherein the inlet end of the concentrate discharge pipeline is connected to the terminal ultrafiltration membrane assembly.

[0012] The beneficial effects of this technical solution are as follows: During the continuous operation of the water-to-injection generating device provided in this application, the concentrate discharge valve can be opened periodically to discharge bacterial endotoxins, colloidal particles, and other impurities intercepted on the inlet side of the terminal ultrafiltration membrane module along with the concentrate through the concentrate discharge pipeline, thereby reducing the accumulation of pollutants inside the terminal ultrafiltration membrane module and extending its service life. Moreover, the concentrate discharge valve and the drain valve are independently set up, respectively for the concentrate side of the terminal ultrafiltration membrane module and the drain side of the pipeline upstream of the reflux valve. The functions of the concentrate discharge valve and the drain valve are clearly distinguished, avoiding mutual interference between different discharge needs and facilitating separate control of the discharge timing and discharge volume.

[0013] Optionally, the branch pipeline includes an interconnected branch section and a second U-shaped pipe section, the injection water product valve is installed at the bottom end of the second U-shaped pipe section, and the terminal ultrafiltration membrane module is located upstream of the second U-shaped pipe section.

[0014] The advantages of this technical solution are as follows: it facilitates the adjustment of the height of the injection water production valve during installation; at the same time, the terminal ultrafiltration membrane module is located upstream of the second U-shaped tube, which maintains a certain pipeline buffer distance between ultrafiltration treatment and product water output, which is beneficial to maintaining the stability of product water quality. Optionally, the branch pipe assembly further includes a temperature gauge installed on the branch pipe, the temperature gauge being located downstream of the second U-shaped section.

[0015] The beneficial effects of this technical solution are as follows: When the water for injection generating device performs hot water disinfection, high-temperature purified water flows through the branch pipe. The thermometer can display the temperature of the medium flowing downstream of the second U-shaped tube in real time, allowing operators to determine whether the disinfection temperature has reached the preset requirements. If the thermometer reading is lower than the disinfection temperature threshold, the operator can adjust the flow rate and pressure by adjusting the second flow regulating valve or the pressure regulating valve to raise the temperature. The thermometer is located downstream of the second U-shaped tube and can reflect the actual water temperature after passing through the second U-shaped tube, making it less likely to cause misjudgment of the disinfection temperature due to local heat dissipation from the U-shaped tube. At the same time, during normal production operation, the thermometer can also be used to monitor the ambient temperature of the medium in the branch pipe, providing reference data for system operation status evaluation.

[0016] Optionally, the branch pipeline assembly further includes a pressure regulating valve and a pressure regulating gauge installed on the branch pipeline, wherein the pressure regulating valve is located upstream of the pressure regulating gauge, and both the pressure regulating valve and the pressure regulating gauge are located upstream of the terminal ultrafiltration membrane module.

[0017] The beneficial effects of this technical solution are as follows: the pressure regulating valve is used to regulate the inlet water pressure entering the terminal ultrafiltration membrane module, and the pressure regulating gauge is used to display the real-time pressure value after being regulated by the pressure regulating valve. Both the pressure regulating valve and the pressure regulating gauge are located upstream of the terminal ultrafiltration membrane module, so that the entire pressure regulation and monitoring process is completed before ultrafiltration treatment, providing stable inlet water conditions for the terminal ultrafiltration membrane module, which helps to extend the service life of the terminal ultrafiltration membrane module and maintain the consistency of its water production performance.

[0018] Optionally, the branch pipeline assembly further includes a second flow regulating valve installed on the branch pipeline, the second flow regulating valve being located upstream of the pressure regulating valve.

[0019] The beneficial effects of this technical solution are as follows: the second flow regulating valve undertakes the main flow distribution function, reducing the adjustment burden of the pressure regulating valve under large pressure difference, and helping to extend the service life of the pressure regulating valve; at the same time, when the water for injection generating device provided in this application is performing hot water disinfection operation, if the temperature gauge reading is too low, the operator can increase the opening of the second flow regulating valve to increase the inflow of high-temperature purified water, thereby increasing the disinfection temperature in the branch pipeline; moreover, the second flow regulating valve, the pressure regulating valve and the pressure gauge cooperate with each other to provide the terminal ultrafiltration membrane module with a wider adjustable range and higher stability of inlet water conditions.

[0020] Another aspect of this application provides a purified water distribution system, including the water supply pipeline and the return water pipeline, as well as the water for injection generating device provided in this application, wherein the inlet end of the main pipeline is connected to the water supply pipeline, and the outlet end of the main pipeline is connected to the return water pipeline of the purified water distribution system.

[0021] The technical solution provided in this application can achieve at least one of the following beneficial effects: The water-to-injection generating device and purified water distribution system provided in this application achieve structural integration with the existing purified water network by directly connecting both ends of the branch pipes to the main pipeline of the purified water distribution system and installing terminal ultrafiltration membrane modules and water-to-injection production valves on the branch pipes. This eliminates the need to construct separate distribution networks containing storage tanks, circulation pumps, disinfection facilities, and pipelines for a small number of water-to-injection usage points, thereby significantly reducing the initial equipment investment cost of the pharmaceutical workshop.

[0022] The additional technical features and advantages of this application will become more apparent from the following description or from practical application. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the specific embodiments of this application, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a partial structural schematic diagram of one embodiment of the purified water distribution system provided in this application.

[0025] Figure label: 01. First flow regulating valve; 02. Main pipeline; 03. Branch pipeline; 04. Second flow regulating valve; 05. Pressure regulating valve; 06. Terminal ultrafiltration membrane module; 07. Pressure gauge; 08. Injection water production valve; 09. Second U-shaped pipe section; 10. Concentrate drain valve; 11. Thermometer; 12. Drain valve; 13. Reflux valve; 14. First U-shaped tube section; 15. Drainage pipes; 16. Concentrated wastewater discharge pipes. Detailed Implementation

[0026] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] like Figure 1 As shown, one aspect of this application provides a water-for-injection generating apparatus, including a main pipeline assembly and branch pipeline assemblies. The main pipeline assembly includes a main pipeline 02 and a first flow regulating valve 01 installed on the main pipeline 02. The inlet end of the main pipeline 02 is used to connect to the water supply pipeline of a purified water distribution system, and the outlet end of the main pipeline 02 is used to connect to the return water pipeline of the purified water distribution system. The branch pipeline assembly includes a branch pipeline 03, and a terminal ultrafiltration membrane module 06 and an injection water product valve 08, both installed on the branch pipeline 03. The terminal ultrafiltration membrane module 06 is located upstream of the injection water product valve 08. The inlet and outlet of the branch pipe 03 are both connected to the main pipe 02. The inlet of the branch pipe 03 is located upstream of the first flow regulating valve 01, and the outlet of the branch pipe 03 is located downstream of the first flow regulating valve 01.

[0030] In this embodiment, preferably, the terminal ultrafiltration membrane module 06 adopts a hollow fiber ultrafiltration membrane form, with the membrane fibers made of polyethersulfone (PES) and the membrane shell made of polysulfone (PS). The membrane fibers have a molecular weight cut of less than 6 kDa and can withstand pasteurization or superheated water sterilization. The suitable transmembrane pressure difference of the terminal ultrafiltration membrane module 06 is 0.5 bar to 1 bar, and the inlet water pressure does not exceed 3 bar. Preferably, the water-to-injection generating device provided in this application is particularly suitable for scenarios where the required flow rate at each point of use of water-to-injection is less than 1000 L / h. Within this flow rate range, the water-to-injection generating device provided in this application eliminates the need for a separate water-to-injection distribution pipeline, which can significantly reduce project investment and operating costs.

[0031] The water-to-injection generating device provided in this application achieves structural integration with the existing purified water network by directly connecting both ends of the branch pipe 03 to the main pipe 02 of the purified water distribution system, and installing a terminal ultrafiltration membrane module 06 and a water-to-injection production valve 08 on the branch pipe 03. This eliminates the need to construct a separate distribution network containing storage tanks, circulation pumps, disinfection facilities, and pipelines for a small number of water-to-injection usage points, thereby significantly reducing the initial equipment investment cost of the pharmaceutical workshop. At the same time, since the device relies on the purified water main pipe 02 for continuous circulation, pasteurization or superheated water disinfection can be performed simultaneously using the original disinfection program of the main pipe 02, eliminating the need for an additional independent disinfection system and reducing the workload and energy consumption during daily operation.

[0032] Actual testing has shown that the water for injection produced by the water for injection generating device provided in this application meets the requirements for water for injection in the Chinese Pharmacopoeia (ChP), the European Pharmacopoeia (Ph.Eur), and the United States Pharmacopoeia (USP). For example, bacterial endotoxin is not greater than 0.25 EU / mL, conductivity is not greater than 1.3 μS / cm at 25℃, and total organic carbon (TOC) is not greater than 0.5 mg / L.

[0033] Optionally, the main pipeline 02 includes a main pipe section and a first U-shaped pipe section 14 connected to each other. The first flow regulating valve 01 is installed on the main pipe section and is located upstream of the first U-shaped pipe section 14. The outlet end of the branch pipeline 03 is connected to the bottom end of the first U-shaped pipe section 14. The arrangement of the first U-shaped pipe section 14 helps to maintain stable system pressure, allows the return fluid to smoothly merge with the fluid in the main pipeline 02, reduces the impact of turbulence on flow regulation, and further improves the reliability of the water for injection generating device provided in this application during long-term continuous operation.

[0034] Optionally, the branch pipeline assembly further includes a reflux valve 13, with the outlet end of the branch pipeline 03 connected to the bottom end of the first U-shaped tube section 14 via the reflux valve 13. Thus, by installing the reflux valve 13 between the outlet end of the branch pipeline 03 and the bottom end of the first U-shaped tube section 14, on-demand control of the reflux path of the branch pipeline 03 is achieved. When there is no demand for water for injection, the reflux valve 13 remains open, allowing purified water or water for injection in the branch pipeline 03 to flow back into the bottom end of the first U-shaped tube section 14 of the main pipeline 02 via the reflux valve 13, maintaining continuous circulation throughout the entire water for injection generation device and inhibiting microbial growth. When water for injection needs to be produced, the reflux valve 13 can be closed and the water for injection product valve 08 can be opened simultaneously, ensuring that all water for injection produced by the terminal ultrafiltration membrane module 06 is output through the water for injection product valve 08, thus preventing backflow or mixing of product water into the reflux pipeline.

[0035] Optionally, the water-to-injection generating apparatus provided in this application embodiment further includes a drain pipeline assembly, which includes a drain pipeline 15 and a drain valve 12 installed on the drain pipeline 15. The inlet end of the drain valve 12 is connected to the branch pipeline 03, and the inlet end of the drain valve 12 is located upstream of the return valve 13. In this way, when the water for injection generator switches from no-demand mode to water production mode, the drain valve 12 can be briefly opened (e.g., for 2 to 5 seconds) to ensure stable operation and discharge any static stagnant water that may exist in the pipeline between the return valve 13 and the drain valve 12. Then, the drain valve 12 is closed and the water for injection production valve 08 is opened, thereby reducing the risk of substandard water quality being mixed into the initial water production when the water for injection production valve 08 is opened. At the same time, during the long-term continuous operation of the water for injection generator, the drain valve 12 can be opened periodically (e.g., once every 8 to 10 hours, for 1 to 3 minutes each time) to flush the inlet side of the terminal ultrafiltration membrane module 06. The flushing water is discharged through the drain pipeline 15, which helps to maintain the cleanliness of the inlet side of the terminal ultrafiltration membrane module 06 and reduce the accumulation of pollutants inside the terminal ultrafiltration membrane module 06.

[0036] Optionally, the drainage pipeline assembly further includes a concentrate discharge pipeline 16 and a concentrate discharge valve 10 installed on the concentrate discharge pipeline 16, wherein the inlet end of the concentrate discharge pipeline 16 is connected to the terminal ultrafiltration membrane module 06. Thus, during the continuous operation of the water-to-injection generating device provided in this application, the concentrate discharge valve 10 can be opened periodically (for example, once every 8 to 10 hours, for 2 to 5 minutes each time) to discharge the bacterial endotoxins, colloidal particles, and other impurities trapped on the inlet side of the terminal ultrafiltration membrane module 06 along with the concentrate through the concentrate discharge pipeline 16, thereby reducing the accumulation of pollutants inside the terminal ultrafiltration membrane module 06 and extending its service life. Moreover, the concentrate discharge valve 10 and the drain valve 12 are independently set up, respectively for the concentrate side of the terminal ultrafiltration membrane module 06 and the drain side of the pipeline upstream of the reflux valve 13. The functions of the concentrate discharge valve 10 and the drain valve 12 are clearly distinguished, avoiding mutual interference between different discharge needs and facilitating separate control of the discharge timing and discharge volume.

[0037] Optionally, the branch pipe 03 includes an interconnected branch section and a second U-shaped pipe section 09. The injectable water product valve 08 is installed at the bottom end of the second U-shaped pipe section 09, and the terminal ultrafiltration membrane module 06 is located upstream of the second U-shaped pipe section 09. This facilitates adjustment of the height of the injectable water product valve 08 during installation; the second U-shaped pipe section 09 relies on the pressure distributed to the system for water flow. Simultaneously, the location of the terminal ultrafiltration membrane module 06 upstream of the second U-shaped pipe section 09 maintains a certain pipeline buffer distance between ultrafiltration treatment and product water output, which is beneficial for maintaining the stability of product water quality. Optionally, the branch pipe assembly further includes a thermometer 11 installed on the branch pipe 03, the thermometer 11 being located downstream of the second U-shaped pipe section 09. In this embodiment, the thermometer 11 is preferably located after the second U-shaped pipe section 09 and before the return valve 13. When the water for injection generating device performs hot water disinfection, high-temperature purified water flows through the branch pipe 03. The thermometer 11 can display the temperature of the medium flowing downstream of the second U-shaped tube 09 in real time, allowing the operator to determine whether the disinfection temperature has reached the preset requirements. If the reading of the thermometer 11 is lower than the disinfection temperature threshold (e.g., below 80°C), the operator can adjust the flow rate and pressure by adjusting the second flow regulating valve or the pressure regulating valve to raise the temperature. The thermometer 11 is located downstream of the second U-shaped tube 09 and can reflect the actual water temperature after passing through the second U-shaped tube 09, making it less likely to cause misjudgment of the disinfection temperature due to local heat dissipation from the U-shaped tube. At the same time, during normal production operation, the thermometer 11 can also be used to monitor the ambient temperature of the medium in the branch pipe 03, providing reference data for system operation status evaluation.

[0038] Optionally, the branch pipeline assembly further includes a pressure regulating valve 05 and a pressure regulating gauge 07 installed on the branch pipeline 03. The pressure regulating valve 05 is located upstream of the pressure regulating gauge 07, and both the pressure regulating valve 05 and the pressure regulating gauge 07 are located upstream of the terminal ultrafiltration membrane module 06. Thus, the pressure regulating valve 05 is used to regulate the inlet water pressure entering the terminal ultrafiltration membrane module 06, and the pressure regulating gauge 07 is used to display the real-time pressure value after regulation by the pressure regulating valve 05. Since both the pressure regulating valve 05 and the pressure regulating gauge 07 are located upstream of the terminal ultrafiltration membrane module 06, the entire pressure regulation and monitoring process is completed before ultrafiltration treatment, providing stable inlet water conditions for the terminal ultrafiltration membrane module 06, which helps to extend the service life of the terminal ultrafiltration membrane module 06 and maintain the consistency of its water production performance.

[0039] Optionally, the branch pipeline assembly further includes a second flow regulating valve 04 installed in the branch pipeline 03, the second flow regulating valve 04 being located upstream of the pressure regulating valve 05. The second flow regulating valve 04 undertakes the main flow distribution function, reducing the adjustment burden of the pressure regulating valve 05 under large pressure differentials, and helping to extend the service life of the pressure regulating valve 05; at the same time, when the water for injection generating device provided in this application is performing hot water disinfection operation, if the reading of the thermometer 11 is too low, the operator can increase the opening of the second flow regulating valve 04 to increase the inflow of high-temperature purified water, thereby increasing the disinfection temperature in the branch pipeline 03; moreover, the second flow regulating valve 04 cooperates with the pressure regulating valve 05 and the pressure regulating gauge 07 to provide the terminal ultrafiltration membrane module 06 with a wider adjustable range and higher stability of inlet water conditions.

[0040] Optionally, some or all of the reflux valve 13, the drain valve 12, the injectable water product valve 08, and the concentrate discharge valve 10 are automatic valves, such as pneumatic or electric valves, and are equipped with limit switches; the pressure gauge is a pressure transmitter, and the temperature gauge 11 is a temperature transmitter; the automatic valves are automatically controlled according to the following sequence: when there is no demand for injectable water, the reflux valve 13 is open, and the drain valve 12, the injectable water product valve 08, and the concentrate discharge valve 10 are closed; when injectable water needs to be produced, the reflux valve 13 is first closed, then the drain valve 12 is opened for 2 to 5 seconds and then closed, and finally the injectable water product valve 08 is opened; during continuous operation, the concentrate discharge valve 10 is automatically opened for 2 to 5 minutes and the drain valve 12 is automatically opened for 1 to 3 minutes at intervals of 8 to 10 hours. The above automatic control sequence is executed by a programmable logic controller (PLC) or a microcontroller, and the operating interface is a touch screen.

[0041] Another aspect of this application provides a purified water distribution system, including the water supply pipeline and the return water pipeline, as well as the water for injection generating device provided in the embodiments of this application. The inlet end of the main pipeline 02 is connected to the water supply pipeline, and the outlet end of the main pipeline 02 is connected to the return water pipeline of the purified water distribution system.

[0042] The purified water distribution system provided in this application is implemented using the water-to-injection generating device provided in this application. By directly connecting both ends of the branch pipe 03 to the main pipe 02 of the purified water distribution system, and installing a terminal ultrafiltration membrane module 06 and a water-to-injection generating valve 08 on the branch pipe 03, structural integration with the existing purified water network is achieved. There is no need to build a separate distribution network containing storage tanks, circulation pumps, disinfection facilities and pipelines for a small number of water-to-injection usage points, thereby significantly reducing the initial equipment investment cost of the pharmaceutical workshop. At the same time, since the device relies on the purified water main pipe 02 to achieve continuous circulation, pasteurization or superheated water disinfection can be carried out simultaneously using the original disinfection program of the main pipe 02, without the need for an additional independent disinfection system, reducing the maintenance workload and energy consumption in daily operation.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An apparatus for generating water for injection, characterized in that, The system includes a main pipeline assembly and branch pipeline assemblies. The main pipeline assembly includes a main pipeline and a first flow regulating valve installed on the main pipeline. The inlet end of the main pipeline is used to connect to the water supply pipeline of the purified water distribution system, and the outlet end of the main pipeline is used to connect to the return water pipeline of the purified water distribution system. The branch piping assembly includes branch piping, and terminal ultrafiltration membrane modules and injection water product valves, both installed on the branch piping. The terminal ultrafiltration membrane modules are located upstream of the injection water product valves. The inlet and outlet of the branch pipe are both connected to the main pipe. The inlet of the branch pipe is located upstream of the first flow regulating valve, and the outlet of the branch pipe is located downstream of the first flow regulating valve.

2. The apparatus for generating water for injection according to claim 1, characterized in that, The main pipeline includes a main pipe section and a first U-shaped pipe section connected to each other. The first flow regulating valve is installed on the main pipe section and is located upstream of the first U-shaped pipe section. The outlet end of the branch pipeline is connected to the bottom end of the first U-shaped pipe section.

3. The apparatus for generating water for injection according to claim 2, characterized in that, The branch pipe assembly also includes a backflow valve, and the outlet end of the branch pipe is connected to the bottom end of the first U-shaped pipe section through the backflow valve.

4. The apparatus for generating water for injection according to claim 3, characterized in that, It also includes a drainage pipeline assembly, which includes a drainage pipeline and a drain valve installed on the drainage pipeline. The inlet end of the drain valve is connected to the branch pipeline, and the inlet end of the drain valve is located upstream of the backflow valve.

5. The apparatus for generating water for injection according to claim 4, characterized in that, The drainage pipeline assembly also includes a concentrate discharge pipeline and a concentrate discharge valve installed on the concentrate discharge pipeline, wherein the inlet end of the concentrate discharge pipeline is connected to the terminal ultrafiltration membrane assembly.

6. The apparatus for generating water for injection according to any one of claims 1 to 5, characterized in that, The branch pipeline includes an interconnected branch section and a second U-shaped pipe section. The injection water product valve is installed at the bottom end of the second U-shaped pipe section, and the terminal ultrafiltration membrane module is located upstream of the second U-shaped pipe section.

7. The apparatus for generating water for injection according to claim 6, characterized in that, The branch pipe assembly also includes a temperature gauge installed on the branch pipe, the temperature gauge being located downstream of the second U-shaped section.

8. The apparatus for generating water for injection according to claim 7, characterized in that, The branch pipeline assembly also includes a pressure regulating valve and a pressure regulating gauge installed on the branch pipeline. The pressure regulating valve is located upstream of the pressure regulating gauge, and both the pressure regulating valve and the pressure regulating gauge are located upstream of the terminal ultrafiltration membrane module.

9. The apparatus for generating water for injection according to claim 8, characterized in that, The branch pipeline assembly also includes a second flow regulating valve installed on the branch pipeline, the second flow regulating valve being located upstream of the pressure regulating valve.

10. A purified water distribution system, characterized in that, It includes the water supply pipeline and the return water pipeline, and the water for injection generating device as described in any one of claims 1 to 9, wherein the inlet end of the main pipeline is connected to the water supply pipeline, and the outlet end of the main pipeline is connected to the return water pipeline of the purified water distribution system.

Images