A device for producing water for injection

Abstract

The utility model discloses a water for injection production device, water inlet line both ends are connected with water storage tank and purified water storage tank respectively, and the both ends of water line are connected with purified water storage tank and production workshop respectively, and the both ends of backwater line are connected with production workshop and purified water storage tank respectively, and production workshop is used for producing injection liquid, and the filter equipment includes quartz sand filter, activated carbon filter and first precision filter, and the quartz sand filter, activated carbon filter, first precision filter and reverse osmosis equipment are sequentially arranged on the water inlet line, wherein, the low-pressure pump is arranged between the quartz sand filter and water storage tank, and the first high-pressure pump is arranged between the first precision filter and reverse osmosis equipment, and the booster pump, ultraviolet disinfection equipment and second precision filter are sequentially connected on the water line, and the third precision filter is connected on the backwater line, and through the design, the high-purity water meeting the water for injection standard can be continuously and stably produced.

Description

Technical Field

[0001] This utility model belongs to the field of pure water production technology, specifically a device for producing water for injection. Background Technology

[0002] With the rapid development of the global pharmaceutical industry, injectable drugs, as an important dosage form for clinical treatment, have seen continuously increasing demands on production scale and quality. The Chinese Pharmacopoeia sets stringent standards for indicators such as microbial limits, conductivity, and total organic carbon in water for injection, and explicitly requires a completely closed preparation process to prevent contamination. Traditional water for injection preparation processes mainly rely on hot-press distillation, which, while meeting basic requirements, suffers from high steam consumption and low water production efficiency, making it difficult to meet the needs of large-scale continuous production in modern pharmaceutical companies. In recent years, reverse osmosis (RO) technology has gradually become the mainstream choice due to its advantages of efficient desalination and low energy consumption. However, how to achieve stable water quality compliance through the synergistic effect of multi-stage filtration and reverse osmosis remains a key issue that the industry urgently needs to address.

[0003] Traditional processes using single sand or activated carbon filtration can only remove large particulate impurities, with limited ability to intercept colloids, organic matter, and microorganisms. This makes the reverse osmosis membrane susceptible to fouling and reduces desalination rates. For example, while activated carbon filtration can adsorb residual chlorine, it is prone to microbial growth after long-term operation, forming a secondary source of pollution.

[0004] A medical injection water preparation system is disclosed in patent publication number CN113087053A. This technology adopts a four-effect horizontal tube falling film evaporator in series structure, and drives evaporation by mixing steam through a jet compressor. However, when the mixed steam enters the first-effect evaporator, there is an overheating phenomenon. The sprayed water needs to consume additional energy to eliminate the overheating, resulting in insufficient thermal efficiency of the first effect. It is impossible to stably provide steam to drive the subsequent evaporators, and the overall water production efficiency of the system decreases, making it impossible to stably maintain the production of purified water. Utility Model Content

[0005] The purpose of this invention is to provide a water-for-injection production apparatus to solve the following technical problems mentioned in the background art:

[0006] Existing purified water production equipment struggles to maintain stable purified water production.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] An apparatus for producing water for injection includes an inlet pipeline, a water supply pipeline, a return pipeline, a water storage tank, a filtration device, a reverse osmosis device, purified water, a purified water storage tank, and a production workshop. The inlet pipeline is connected at both ends to the water supply tank and the purified water storage tank, respectively. The water supply pipeline is connected at both ends to the purified water storage tank and the production workshop, respectively. The return pipeline is connected at both ends to the production workshop and the purified water storage tank, respectively. The production workshop is used to produce the injection solution. The filtration device includes a quartz sand filter, an activated carbon filter, and a first precision filter. The quartz sand filter, activated carbon filter, first precision filter, and reverse osmosis device are sequentially arranged on the inlet pipeline. A low-pressure pump is installed between the quartz sand filter and the water storage tank, and a first high-pressure pump is installed between the first precision filter and the reverse osmosis device. A booster pump, an ultraviolet disinfection device, and a second precision filter are sequentially connected to the water supply pipeline, and a third precision filter is connected to the return pipeline.

[0009] Furthermore, a first pipe is connected to one side of the water storage tank, and the other end of the first pipe is connected to a drinking water source. A first valve and a second valve are installed on the first pipe.

[0010] Furthermore, a first exhaust pipe is installed on the water storage tank, and a second exhaust pipe is installed on the purified water storage tank.

[0011] Furthermore, there are two low-pressure pumps connected in parallel. One low-pressure pump has a third valve and a fourth valve at each end, and the other low-pressure pump has a fifth valve and a sixth valve at each end.

[0012] Furthermore, a first metering pump and a first pressure gauge are installed between the low-pressure pump and the quartz sand filter; a second metering pump and a second pressure gauge are installed between the quartz sand filter and the activated carbon filter; a third pressure gauge is installed between the activated carbon filter and the first precision filter; a fourth pressure gauge and a seventh valve are installed between the first precision filter and the first high-pressure pump; and an eighth valve is installed between the first high-pressure pump and the reverse osmosis equipment.

[0013] Furthermore, there are two sets of reverse osmosis equipment, which are connected in series.

[0014] Furthermore, a third metering pump and a second high-pressure pump are installed between the two sets of reverse osmosis equipment; a ninth valve is installed between the third metering pump and the reverse osmosis equipment, and a tenth valve and an eleventh valve are installed at both ends of the second high-pressure pump.

[0015] Furthermore, a twelfth valve is installed between the reverse osmosis equipment and the purified water storage tank.

[0016] Furthermore, a first discharge pipe is installed at the bottom of the water storage tank, and a first discharge valve is installed on the first discharge pipe; a second discharge pipe is installed between the booster pump and the purified water storage tank, and a second discharge valve is installed on the second discharge pipe; a thirteenth valve and a fourteenth valve are installed on both sides of the booster pump; a plate heat exchanger is installed between the ultraviolet disinfection equipment and the booster pump.

[0017] Furthermore, the ultraviolet disinfection equipment includes a housing, a connector, an inner tube, a lamp, a disturbance plate, a disturbance motor, and a guide plate. The housing has an inlet and an outlet on each side. The inner tube is connected to the housing, with one side extending into the housing. The lamp is located inside the inner tube. The connector is threaded to the housing and used to seal the inner tube and the housing. The disturbance motor is connected to the outside of the housing, with its output shaft extending into the housing. The disturbance plate is fixed to the end of the output shaft. The guide plate has a spiral structure and is fixed to the inner wall of the housing.

[0018] Furthermore, a circulating water pipeline is installed between the production workshop and the second precision filter; one end of the circulating water pipeline is connected to the water supply pipeline, and the other end is connected to the purified water storage tank; a fifteenth valve is also installed on the circulating water pipeline.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention utilizes a quartz sand filter, an activated carbon filter, and a precision filter to progressively intercept and remove impurities ranging from large particles to tiny colloids and organic matter. The water is then further desalinated and sterilized by reverse osmosis. This process ensures a continuous and stable production of high-purity water that meets the standards for water for injection, guaranteeing the safety of water quality in injection production from the source. The return water pipeline allows for the purification and reuse of production waste, reducing water resource waste. The combination of multi-stage filtration and reverse osmosis rationally allocates filtration precision, reduces the load on individual equipment, extends the lifespan of consumables such as filter cartridges and membrane elements, saves on equipment maintenance costs, and achieves energy conservation and efficient resource utilization. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the water inlet pipe section of this utility model;

[0023] Figure 3 This is a structural schematic diagram of the water supply pipe and return water pipe of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall structure of the ultraviolet disinfection equipment of this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the ultraviolet disinfection device of this utility model;

[0026] Figure 6 This is a schematic diagram of the disturbance plate of this utility model.

[0027] The diagram is labeled as follows: 1-Drinking water source, 2-First pipeline, 3-First valve, 4-Second valve, 5-First exhaust pipeline, 6-Third valve, 7-Fourth valve, 8-Inlet pipeline, 9-First pressure gauge, 10-Second pressure gauge, 11-Water storage tank, 12-First discharge pipe, 13-First discharge valve, 14-Fifth valve, 15-Low-pressure pump, 16-Sixth valve, 17-First metering pump, 18-Quartz sand filter, 19-Second metering pump, 20-Activated carbon filter, 21-Third pressure gauge, 22-Fourth pressure gauge, 23-Seventh valve, 24-Eighth valve, 25-First precision filter, 26-First high-pressure pump, 27-Reverse osmosis equipment, 28-Ninth valve, 29-Third metering pump. 30-Tenth valve, 31-Second high-pressure pump, 32-Eleventh valve, 33-Twelfth valve, 34-Purified water storage tank, 35-Second discharge valve, 36-Second discharge pipe, 37-Thirteenth valve, 38-Booster pump, 39-Fourteenth valve, 40-Plate heat exchanger, 41-Ultraviolet disinfection equipment, 42-Second precision filter, 43-Water pipeline, 44-Fifteenth valve, 45-Production workshop, 46-Circulating water pipeline, 47-Return water pipeline, 48-Third precision filter, 49-Second exhaust pipe, 50-Shell, 51-Inner tube, 52-Guide plate, 53-Disturbance plate, 54-Disturbance motor, 55-Outlet, 56-Inlet, 57-Sealing ring, 58-Connector, 59-Lamp tube. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example:

[0030] An apparatus for producing water for injection, such as Figure 1As shown, the system includes an inlet water pipeline 8, a water supply pipeline 43, a return water pipeline 47, a water storage tank 11, filtration equipment, a reverse osmosis system 27, purified water, a purified water storage tank 34, and a production workshop 45. The inlet water pipeline 8 is connected at both ends to the water storage tank 11 and the purified water storage tank 34, respectively. The water supply pipeline 43 is connected at both ends to the purified water storage tank 34 and the production workshop 45, respectively. The return water pipeline 47 is connected at both ends to the production workshop 45 and the purified water storage tank 34, respectively. The production workshop 45 is used for producing injection solutions. The filtration equipment includes a quartz sand filter 18 and an activated carbon filter. Filter 20 and first precision filter 25; quartz sand filter 18, activated carbon filter 20, first precision filter 25 and reverse osmosis equipment 27 are sequentially arranged on the inlet pipe 8, wherein a low-pressure pump 15 is arranged between quartz sand filter 18 and water storage tank 11, and a first high-pressure pump 26 is arranged between first precision filter 25 and reverse osmosis equipment 27; a booster pump 38, ultraviolet disinfection equipment 41 and second precision filter 42 are sequentially connected to the water pipe 43, and a third precision filter 48 is connected to the return water pipe 47.

[0031] The water storage tank 11 serves to store raw water, buffering fluctuations in the raw water supply and ensuring stable operation of subsequent treatment processes. The quartz sand filter 18 utilizes the filtration effect of quartz sand to intercept large particles of impurities such as silt and rust in the water, reducing turbidity and performing preliminary purification of the raw water. The low-pressure pump 15 provides pressure to the raw water, allowing it to pass smoothly through the quartz sand filter 18 and subsequent filtration equipment. The activated carbon filter 20 relies on the adsorption capacity of activated carbon to adsorb organic matter, residual chlorine, pigments, etc., further purifying the water quality. The first precision filter 25 has higher filtration precision, removing smaller particulate impurities and colloids from the water, providing water that meets the inlet requirements for the reverse osmosis equipment 27 and protecting the reverse osmosis membrane from damage by large particles. The first high-pressure pump 26 provides sufficient pressure to the water entering the reverse osmosis equipment 27, enabling the water to overcome the resistance of the reverse osmosis membrane, achieving separation of water from impurities such as salt, and producing high-purity water. The reverse osmosis equipment 27 uses the principle of a semi-permeable membrane. Under pressure, water is forced through the semi-permeable membrane, while impurities such as salt, bacteria, and viruses in the water are retained, thereby achieving the purpose of removing impurities and purifying water quality.

[0032] Specifically, during use, the water in the purified water storage tank 34 is transported to the production workshop 45 via water pipeline 43 for the production of injection solutions. During transport, the water is first pressurized by a booster pump 38 to meet the required transport pressure, and then sequentially passes through an ultraviolet disinfection device 41 and a second precision filter 42 to further kill bacteria and remove fine particulate impurities, ensuring that the water delivered to the production workshop 45 meets the standards for water for injection. Water used in the production workshop 45 is returned to the purified water storage tank 34 via a return water pipeline 47. During the return process, the water passes through a third precision filter 48 to filter the returned water, removing impurities and preventing their accumulation in the purified water storage tank 34, which could affect the overall water quality of the system.

[0033] In a preferred embodiment, such as Figure 1 as well as Figure 2 As shown, a first pipe 2 is connected to one side of the water storage tank 11, and the other end of the first pipe 2 is connected to the drinking water source 1. A first valve 3 and a second valve 4 are installed on the first pipe 2. The first pipe 2 connects the drinking water source 1 and the water storage tank 11. The first valve 3 and the second valve 4 on it work together to control the raw water input: the first valve 3 is used to cut off or open the main water source, and the second valve 4 regulates the inlet water flow. The two work together to stabilize the water level in the water storage tank 11, prevent overflow, and isolate the water source during equipment maintenance to ensure the safe operation of the system.

[0034] In a preferred embodiment, such as Figure 1 , Figure 2 as well as Figure 3 As shown, the water storage tank 11 is equipped with a first vent pipe 5, and the purified water storage tank 34 is equipped with a second vent pipe 49. The first vent pipe 5 of the water storage tank 11 is used to remove air, microorganisms, and volatile substances brought in during water intake, preventing air blockage from affecting water intake efficiency. A sterilization filter can be installed on the first vent pipe 5 to prevent external contamination. The second vent pipe 49 of the purified water storage tank 34 balances the pressure inside the tank during water intake and output. A sterilization filter can be installed on the second vent pipe 49 to prevent airborne microorganisms and particulate pollutants from entering, ensuring that the stored water quality meets the standards for water for injection.

[0035] In a preferred embodiment, such as Figure 1 as well as Figure 2As shown, two low-pressure pumps 15 are provided, connected in parallel. One low-pressure pump 15 has a third valve 6 and a fourth valve 7 at its two ends, while the other low-pressure pump 15 has a fifth valve 14 and a sixth valve 16 at its two ends. The two low-pressure pumps 15 are connected in parallel and can be used as backups for each other or operate simultaneously through the valves: when one pump fails, the corresponding valve is closed and the other pump is activated to ensure continuous water supply in the pretreatment stage; the valves can also be adjusted according to the raw water flow requirements to operate with one or two pumps, improving the system's flexibility and reliability, while also facilitating isolated maintenance of a single pump without affecting the overall process operation.

[0036] In a preferred embodiment, such as Figure 1 as well as Figure 2 As shown, a first metering pump 17 and a first pressure gauge 9 are installed between the low-pressure pump 15 and the quartz sand filter 18; a second metering pump 19 and a second pressure gauge 10 are installed between the quartz sand filter 18 and the activated carbon filter 20; a third pressure gauge 21 is installed between the activated carbon filter 20 and the first precision filter 25; a fourth pressure gauge 22 and a seventh valve 23 are installed between the first precision filter 25 and the first high-pressure pump 26; and an eighth valve 24 is installed between the first high-pressure pump 26 and the reverse osmosis equipment 27. The metering pumps and pressure gauges work together to ensure water quality and equipment safety during the pretreatment stage: the first metering pump 17 quantitatively adds flocculant to aid quartz sand filtration; the second metering pump 19 adds activated carbon regenerator or bactericide; the pressure gauges monitor the pressure difference in real time, and, in conjunction with the seventh valve 23 and the eighth valve 24, achieve fault isolation. For example, if the pressure before the high-pressure pump is abnormal, the valve is closed to protect the reverse osmosis membrane, ensuring stable pretreatment results and extending equipment life.

[0037] In a preferred embodiment, such as Figure 1 as well as Figure 2 As shown, the reverse osmosis unit 27 consists of two sets, connected in series. This series connection significantly improves the desalination rate and water quality reliability: the first RO membrane removes most of the salt, while the second further refines the permeate, achieving a total desalination rate exceeding 99.5%, meeting the low conductivity requirements for water for injection. Simultaneously, it provides redundancy; when the performance of one membrane deteriorates, the other can still maintain water quality standards, reducing the risk of water quality issues due to membrane aging or fouling, and extending the overall system lifespan.

[0038] In a preferred embodiment, such as Figure 1 as well as Figure 2As shown, a third metering pump 29 and a second high-pressure pump 31 are installed between the two sets of reverse osmosis units 27. A ninth valve 28 is installed between the third metering pump 29 and the reverse osmosis unit 27, and a tenth valve 30 and an eleventh valve 32 are installed at both ends of the second high-pressure pump 31. The third metering pump 29 adds scale inhibitors or reducing agents, such as sodium bisulfite, to the two sets of reverse osmosis units 27 through the ninth valve 28 to prevent scaling or oxidation of the second set of membranes. The second high-pressure pump 31 provides sufficient pressure to the second set of reverse osmosis units 27 through the tenth and eleventh valves 30 and 32 to ensure efficient operation of the series system. The valve combination allows for independent start-up, shutdown, and maintenance of the pumps, improving system flexibility.

[0039] In a preferred embodiment, such as Figure 1 as well as Figure 2 As shown, a twelfth valve 33 is installed between the reverse osmosis unit 27 and the purified water storage tank 34. The twelfth valve 33 is used to control the flow of permeate from the reverse osmosis unit 27 into the purified water storage tank 34: it is opened during normal operation to allow permeate flow; it is closed during equipment maintenance, RO membrane cleaning, or when the permeate water quality is abnormal, isolating the storage tank to prevent contamination. At the same time, it facilitates the individual adjustment of the reverse osmosis system's operating status, ensuring the stability of the purified water quality in the purified water storage tank 34 and the flexibility of system operation.

[0040] In a preferred embodiment, such as Figure 1 , Figure 2 as well as Figure 3 As shown, a first discharge pipe 12 is provided at the bottom of the water storage tank 11, and a first discharge valve 13 is provided on the first discharge pipe 12; a second discharge pipe 36 is provided between the booster pump 38 and the purified water storage tank 34, and a second discharge valve 35 is provided on the second discharge pipe 36; a thirteenth valve 37 and a fourteenth valve 39 are provided on both sides of the booster pump 38; a plate heat exchanger 40 is provided between the ultraviolet disinfection equipment 41 and the booster pump 38.

[0041] The first discharge pipe 12 and the first discharge valve 13 at the bottom of the water storage tank 11 are used to periodically discharge impurities deposited at the bottom of the tank to maintain the quality of the raw water. The second discharge pipe 36 and the second discharge valve 35 between the booster pump 38 and the purified water storage tank 34 can discharge wastewater in the pipeline during system cleaning or failure to prevent the spread of pollution. The thirteenth valve 37 and the fourteenth valve 39 on both sides of the booster pump 38 are used to isolate the pump body and facilitate the shut-off of water flow during maintenance. The plate heat exchanger 40 between the ultraviolet disinfection equipment 41 and the booster pump 38 regulates the water temperature through the heat exchange medium. For example, if it is controlled at 20-25℃, it ensures that the inactivation efficiency of ultraviolet light on microorganisms in the water is stable, while avoiding temperature fluctuations from affecting the subsequent precision filtration effect.

[0042] In a preferred embodiment, such as Figures 4 to 6As shown, the ultraviolet disinfection equipment includes a housing 50, a connector 58, an inner tube 51, a lamp 59, a disturbance plate 53, a disturbance motor 54, and a guide plate 52. The housing 50 has an inlet 56 and an outlet 55 on its two sides, respectively. The inner tube 51 is connected to the housing 50, with one side extending into the housing 50. The lamp 59 is located inside the inner tube 51. The connector 58 is threadedly connected to the housing 50 and used to seal the inner tube 51 and the housing 50. The disturbance motor 54 is connected to the outside of the housing 50, and its output shaft extends into the housing 50. The disturbance plate 53 is fixed to the end of the output shaft. The guide plate 52 has a spiral structure and is fixed to the inner wall of the housing 50.

[0043] The housing 50 serves as the main frame of the equipment, providing installation space and protecting internal components. The connector 58 connects to the housing 50 via threads, achieving a seal between the inner tube 51 and the housing 50 to prevent leakage. A sealing ring 57 is also provided between the connector 58 and the housing 50. The inner tube 51 provides an installation position for the lamp tube 59 and isolates the lamp tube 59 from the water to be disinfected. The inner tube 51 is made of transparent material, such as plastic or glass. The lamp tube 59 generates ultraviolet light to sterilize and disinfect the water. The agitator motor 54 drives the agitator plate 53 to rotate, stirring the water to make its flow more uniform and improve the disinfection effect. The agitator plate 53 enhances the agitation of the water to avoid insufficient disinfection in some areas. The spiral guide plate 52 guides the water to flow along a spiral path, extending the residence time of the water in the housing 50 and ensuring that the ultraviolet light is fully effective. This structure solves the technical problems of insufficient water disinfection and low efficiency during ultraviolet disinfection: the spiral guide plate 52 extends the residence time of water in the shell 50, avoiding insufficient disinfection in some areas caused by excessive water flow; the disturbance plate 53 and the disturbance motor 54 work together to enhance water disturbance, break up water flow stratification or dead zones, and allow the water to fully contact the ultraviolet light; the inner tube 51 isolates the lamp tube 59 and the water to ensure ultraviolet light transmission at the same time, and the sealing design of the connector 58 prevents water leakage from affecting the operation of the equipment, thus improving the uniformity and efficiency of disinfection.

[0044] In a preferred embodiment, such as Figure 1 as well as Figure 3As shown, a circulating water pipe 46 is also installed between the production workshop 45 and the second precision filter 42. One end of the circulating water pipe 46 is connected to the water supply pipe 43, and the other end is connected to the purified water storage tank 34. A fifteenth valve 44 is also installed on the circulating water pipe 46. The circulating water pipe 46 between the production workshop 45 and the second precision filter 42 realizes water circulation through the fifteenth valve 44: during normal production, the valve is opened to allow some of the injection water to flow back to the purified water storage tank 34 through the circulating pipe, maintaining the continuous flow of water in the pipeline and avoiding stagnant water sections; at the same time, the system pressure and flow rate can be regulated through circulation. When the water consumption of the production workshop 45 fluctuates, excess purified water flows back through the circulating pipe 46 to ensure stable water supply. Combined with regular disinfection, this improves the microbial control capability of the entire water supply system.

[0045] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for producing water for injection, characterized in that: It includes an inlet water pipeline (8), a water supply pipeline (43), a return water pipeline (47), a water storage tank (11), a filtration device, a reverse osmosis device (27), purified water, a purified water storage tank (34), and a production workshop (45); The two ends of the water inlet pipe (8) are connected to the water storage tank (11) and the purified water storage tank (34) respectively. The two ends of the water inlet pipe (43) are connected to the purified water storage tank (34) and the production workshop (45) respectively. The two ends of the return water pipe (47) are connected to the production workshop (45) and the purified water storage tank (34) respectively. The production workshop (45) is used to produce injection solution. The filtration equipment includes a quartz sand filter (18), an activated carbon filter (20), and a first precision filter (25); the quartz sand filter (18), the activated carbon filter (20), the first precision filter (25), and the reverse osmosis equipment (27) are sequentially installed on the inlet pipe (8), wherein a low-pressure pump (15) is installed between the quartz sand filter (18) and the water storage tank (11), and a first high-pressure pump (26) is installed between the first precision filter (25) and the reverse osmosis equipment (27); a booster pump (38), an ultraviolet disinfection equipment (41), and a second precision filter (42) are sequentially connected on the water pipe (43), and a third precision filter (48) is connected on the return water pipe (47).

2. The water-for-injection production apparatus according to claim 1, characterized in that: A first pipe (2) is connected to one side of the water storage tank (11), and the other end of the first pipe (2) is connected to the drinking water source (1). A first valve (3) and a second valve (4) are installed on the first pipe (2).

3. The apparatus for producing water for injection according to claim 1, characterized in that: A first exhaust pipe (5) is provided on the water storage tank (11), and a second exhaust pipe (49) is provided on the purified water storage tank (34).

4. The apparatus for producing water for injection according to claim 1, characterized in that: There are two low-pressure pumps (15), which are connected in parallel. One of the low-pressure pumps (15) is equipped with a third valve (6) and a fourth valve (7) at both ends, and the other low-pressure pump (15) is equipped with a fifth valve (14) and a sixth valve (16) at both ends.

5. The apparatus for producing water for injection according to claim 1, characterized in that: A first metering pump (17) and a first pressure gauge (9) are installed between the low-pressure pump (15) and the quartz sand filter (18); a second metering pump (19) and a second pressure gauge (10) are installed between the quartz sand filter (18) and the activated carbon filter (20); a third pressure gauge (21) is installed between the activated carbon filter (20) and the first precision filter (25); a fourth pressure gauge (22) and a seventh valve (23) are installed between the first precision filter (25) and the first high-pressure pump (26); and an eighth valve (24) is installed between the first high-pressure pump (26) and the reverse osmosis equipment (27).

6. The apparatus for producing water for injection according to claim 1, characterized in that: Two sets of reverse osmosis equipment (27) are provided, and the two sets of reverse osmosis equipment (27) are connected in series; A third metering pump (29) and a second high-pressure pump (31) are installed between the two sets of reverse osmosis equipment (27); a ninth valve (28) is installed between the third metering pump (29) and the reverse osmosis equipment (27), and a tenth valve (30) and an eleventh valve (32) are installed at both ends of the second high-pressure pump (31).

7. The apparatus for producing water for injection according to claim 1, characterized in that: A twelfth valve (33) is installed between the reverse osmosis unit (27) and the purified water storage tank (34).

8. The apparatus for producing water for injection according to claim 1, characterized in that: A first discharge pipe (12) is provided at the bottom of the water storage tank (11), and a first discharge valve (13) is provided on the first discharge pipe (12); a second discharge pipe (36) is provided between the booster pump (38) and the purified water storage tank (34), and a second discharge valve (35) is provided on the second discharge pipe (36); a thirteenth valve (37) and a fourteenth valve (39) are provided on both sides of the booster pump (38); a plate heat exchanger (40) is provided between the ultraviolet disinfection equipment (41) and the booster pump (38).

9. The apparatus for producing water for injection according to claim 8, characterized in that: The ultraviolet disinfection device (41) includes a housing (50), a connector (58), an inner tube (51), a lamp tube (59), a disturbance plate (53), a disturbance motor (54), and a guide plate (52). The housing (50) has an inlet (56) and an outlet (55) on its two sides respectively. The inner tube (51) is connected to the housing (50), and one side of the inner tube (51) extends into the housing (50). The lamp tube (59) is located inside the inner tube (51). The connector (58) is threaded to the housing (50) and is used to seal the inner tube (51) and the housing (50). The disturbance motor (54) is connected to the outside of the housing (50), and the output shaft of the disturbance motor (54) extends into the housing (50). The disturbance plate (53) is fixed to the end of the output shaft. The guide plate (52) has a spiral structure and is fixed to the inner wall of the housing (50).

10. The apparatus for producing water for injection according to claim 1, characterized in that: A circulating water pipe (46) is also installed between the production workshop (45) and the second precision filter (42); one end of the circulating water pipe (46) is connected to the water supply pipe (43), and the other end is connected to the purified water storage tank (34); a fifteenth valve (44) is also installed on the circulating water pipe (46).

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