Sterilization system based on MF membrane microfiltration technology

Abstract

The utility model provides a sterilization system based on an MF membrane microfiltration technology, which comprises a filter vat, the bottom of the filter vat is fixedly arranged on a bearing plate, the bottom of the bearing plate is arranged above a base through four support shafts, a controller is arranged in the middle of the top surface of the base, a hydraulic cylinder is arranged at the top of the controller, and the hydraulic cylinder is connected with the filter vat. The top of the hydraulic cylinder is in driving connection with a vertical hydraulic shaft, the top end of the hydraulic shaft is connected with a pressing plate, and the side wall of the pressing plate is hermetically connected with the inner wall of the filtering barrel; an MF membrane microfiltration plate is arranged at the middle upper part in the filter barrel, the MF membrane microfiltration plate consists of an upper filter screen, a lower filter screen, a fixing ring and a central shaft, the central shaft is vertically arranged, and a plurality of layers of fiber branch microfiltration membranes are arranged between the two filter screens; a top cover is arranged at the top of the filtering barrel; a crank is arranged at the top of the top cover. According to the utility model, the flowing directions of the lower liquid inlet and the upper liquid outlet are set, and the water pressure is supplied from bottom to top, so that the factor of the gravity of the liquid in the filtering barrel is avoided, and the accurate control on the pressure applied to the pressing plate is favorably improved.

Description

Technical Field

[0001] This utility model relates to the field of MF membrane microfiltration sterilization technology, and in particular to a sterilization system based on MF membrane microfiltration technology. Background Technology

[0002] MF membranes are microporous filtration membranes. Their basic principle is a sieving process, typically operating at pressures between 0.7 and 7 kPa. Under static pressure difference, the feed liquid permeates through the filter material to achieve filtration and sterilization. MF membrane filter materials come in many types, such as pleated filter cartridges, melt-blown filter cartridges, and microfiltration membranes for bag filters. These microporous membranes, made of cellulose or polymer materials, utilize their uniform pore size to trap particles and bacteria in the water, preventing them from passing through and thus removing them. Currently, there are more than ten specifications for microporous membranes, with pore sizes ranging from 14 μm to 0.025 μm and membrane thicknesses from 120 to 150 μm. Membrane types include: mixed fiber ester microporous membranes, nitrocellulose membranes, polyvinylidene fluoride membranes, cellulose acetate membranes, regenerated cellulose membranes, polyamide membranes, polytetrafluoroethylene membranes, and polyvinyl chloride membranes. Microfiltration technology is commonly used for further filtration of high-purity water in the electronics industry, semiconductors, and large-scale integrated circuit production.

[0003] With the development of industrial technology, the demand for high-purity water is increasing. The preparation process of high-purity water typically requires the use of microfiltration technology for impurity removal and sterilization. Therefore, to meet the ever-growing demand for high-purity water in industrial production, various microporous membrane filtration devices have been manufactured and are widely used. For example, a microporous membrane sterilization filter (patent number: CN202321938422.4) includes a support, drain pipe, sewage pipe, filter cylinder, microporous membrane filter element, antibacterial ceramic frame, and sewage outlet. The system comprises a mounting plate, a water inlet, a water pump, and a water inlet pipe. A drain pipe is installed at the rear of the bottom end of the support, and a sewage pipe is installed at the front of the bottom end of the support. The filter cartridge is installed at the top of the support, and the microporous membrane filter element is installed on the drain pipe through the top of the support. An antibacterial ceramic frame is installed on the side of the microporous membrane filter element. The sewage outlet is connected to the sewage pipe through the top of the support. The mounting plate is fixed to the top of the filter cartridge, the water inlet is located at the front of the mounting plate, and the water pump is installed at the top of the mounting plate. The water inlet pipe is connected to the water inlet through the water pump. This invention solves the problem that the filter area of ​​the microporous membrane filter element in a microporous membrane filter machine is generally provided with filter holes and grooves, which inevitably lead to the accumulation of residual bacteria after long-term filtration use, creating a safety hazard.

[0004] Existing microporous membrane filters all use a top-inlet and bottom-outlet liquid method, and use a water pump to apply water pressure from top to bottom to achieve the microfiltration process. Since the liquid itself is subject to gravity, it will exert a certain pressure on the microfiltration membrane. With the additional pressure applied, it will be more difficult to control the pressure during the microfiltration process. Under such uncontrollable pressure microfiltration conditions, not only will the microfiltration effect be affected, but it will also cause certain damage to the MF microfiltration membrane. Utility Model Content

[0005] The technical problem to be solved by this utility model is that existing microporous membrane filters all adopt the method of liquid inlet at the top and liquid outlet at the bottom, and water pressure is applied from top to bottom by a water pump. Since the liquid itself is subject to gravity, it will exert a certain pressure on the microfiltration membrane. In addition, the additional pressure will make it more difficult to control the pressure during the microfiltration process. This will not only affect the microfiltration effect, but also cause certain damage to the MF microfiltration membrane.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0007] A sterilization system based on MF membrane microfiltration technology includes a filter cartridge. The bottom of the filter cartridge is fixedly mounted on a support plate. The bottom of the support plate is supported by four shafts above a base. The support plate is vertically continuous. A controller is located in the center of the top surface of the base. A hydraulic cylinder is mounted on the top of the controller. A vertical hydraulic shaft is driven by the top of the hydraulic cylinder. The top of the hydraulic shaft passes through the bottom of the filter cartridge and extends into the cartridge. A pressure plate is connected to the top of the hydraulic shaft. The pressure plate has a circular cross-section and its sidewalls are flush with the inner wall of the filter cartridge. The filter is sealed and connected; an MF membrane microfiltration plate is installed in the upper middle part of the filter barrel. The MF membrane microfiltration plate consists of two filter screens, a fixing ring, and a central shaft. The fixing ring surrounds the filter screen, and the central shaft is vertically arranged and connects the two filter screens vertically. Several layers of fiber ester microporous filter membrane are provided between the two filter screens; a top cover is provided on the top of the filter barrel, and a crank handle is provided on the top of the top cover; an inlet pipe is connected to the lower part of the side wall of the filter barrel, and an outlet pipe is connected to the side wall of the filter barrel above the MF membrane microfiltration plate.

[0008] Preferably, a step is provided at the connection between the inner wall of the filter bucket and the MF membrane microfiltration plate, an internal thread is provided on the inner wall of the filter bucket located above the step, an external thread is provided on the outer wall of the top cover, an external thread is provided on the outer wall of the fixing ring, and the top cover and the fixing ring are screwed to the filter bucket respectively.

[0009] Preferably, the MF membrane microfiltration plate has an upward convex arc shape in the middle, and the longitudinal section of the MF membrane microfiltration plate has an upward arched arc shape.

[0010] Preferably, a sealing gasket is provided between the fixing ring and the step.

[0011] Preferably, the pressure plate has an upward convex arc shape in the middle, and the arc of the pressure plate is the same as that of the MF membrane microfiltration plate.

[0012] Preferably, a sealing ring is provided around the side wall of the pressure plate.

[0013] Preferably, an adjustable support foot is provided at each of the four corners of the bottom of the base.

[0014] Preferably, a level is provided on the top surface of the base.

[0015] Preferably, a lifting ring is provided at each of the four corners of the top surface of the base.

[0016] Preferably, a backflow valve is provided on the inlet pipe.

[0017] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0018] (1) By setting the flow direction of liquid inlet at the bottom and liquid outlet at the top, and cooperating with the controller, hydraulic cylinder, hydraulic shaft and pressure plate, water pressure is applied from bottom to top, so that when the controller controls the power output of the hydraulic cylinder to the pressure plate, it is not affected by the gravity of the liquid in the filter bucket, which helps to improve the precise control of the pressure applied to the pressure plate, and avoids the pressure being too low and reducing the microfiltration effect, or the pressure being too high and damaging the MF membrane microfiltration plate.

[0019] (2) By setting the arc-shaped MF membrane microfiltration plate, the contact area with the liquid can be increased, thereby improving the efficiency of microfiltration. Attached Figure Description

[0020] Figure 1 This is an external overall schematic diagram of a sterilization system based on MF membrane microfiltration technology according to this utility model;

[0021] Figure 2 This is a schematic diagram of the longitudinal cross-sectional structure of a sterilization system based on MF membrane microfiltration technology according to this utility model;

[0022] Figure 3 This is a schematic diagram showing the internal structure of the filter cartridge in a sterilization system based on MF membrane microfiltration technology according to this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the MF membrane microfiltration plate in a sterilization system based on MF membrane microfiltration technology according to this utility model;

[0024] Figure 5 This is a schematic diagram of the pressure plate in a sterilization system based on MF membrane microfiltration technology according to this utility model;

[0025] Figure 6This is a schematic diagram of the longitudinal cross-sectional structure of the MF membrane microfiltration plate in a sterilization system based on MF membrane microfiltration technology according to this utility model.

[0026] The attached figures are labeled as follows: 1. Filter barrel; 101. Step; 2. Support plate; 3. Support shaft; 4. Lifting ring; 5. Base; 6. Adjustable support leg; 7. Level; 8. Controller; 9. Hydraulic cylinder; 10. Hydraulic shaft; 11. Handle; 12. Top cover; 13. Inlet pipe; 14. Backflow valve; 15. Outlet pipe; 16. Sealing gasket; 17. Central shaft; 18. External thread; 19. MF membrane microfiltration plate; 1901. Filter screen; 1902. Fiber ester microporous filter membrane; 20. Fixing ring; 21. Internal thread; 22. Pressure plate; 2201. Sealing ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] Example 1:

[0030] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6The bottom of the filter bucket 1 is fixedly mounted on a support plate 2. The bottom of the support plate 2 is mounted on a base 5 via four support shafts 3. The support plate 2 is vertically continuous in the middle. A lifting ring 4 is provided at each of the four corners of the top surface of the base 5. A controller 8 is provided in the middle of the top surface of the base 5. A hydraulic cylinder 9 is provided on the top of the controller 8. The top of the hydraulic cylinder 9 is connected to a vertical hydraulic shaft 10. The top of the hydraulic shaft 10 passes through the bottom of the filter bucket 1 and extends into the bucket. A pressure plate 22 is connected to the top of the hydraulic shaft 10. The pressure plate 22 has a circular cross-section and its sidewall is sealed to the inner wall of the filter bucket 1. A sealing ring 2201 is provided around the sidewall of the pressure plate 22 to prevent leakage. An MF membrane microfiltration plate 19 is provided in the upper middle part of the filter bucket 1. The MF membrane microfiltration plate 19 consists of two filter screens 1901, a fixing ring 20, and a central shaft 17. The fixing ring 20 surrounds the filter screens 1901. 1. A central shaft 17 is vertically arranged and connects two filter screens 1901 vertically. Several layers of fiber ester microporous filter membranes 1902 are provided between the two filter screens 1901. A top cover 12 is provided on the top of the filter bucket 1, and a crank handle 11 is provided on the top of the top cover 12. An inlet pipe 13 is connected to the lower part of the side wall of the filter bucket 1. A counterflow valve 14 is provided on the inlet pipe 13. An outlet pipe 15 is connected to the side wall of the filter bucket 1 above the MF membrane microfiltration plate 19. Liquid enters the filter bucket 1 through the inlet pipe 13. When the space between the MF membrane microfiltration plate 19 and the pressure plate 22 is filled with liquid, the controller 8 controls the hydraulic cylinder 9 to output stably according to the specified pressure command to squeeze the liquid. After the liquid is subjected to a certain pressure, it passes through the MF membrane microfiltration plate 19 for filtration, blocking and removing microparticles and bacteria in the liquid. The filtered liquid is squeezed into the space above the MF membrane microfiltration plate 19 and flows out along the outlet pipe 15.

[0031] Example 2:

[0032] refer to Figure 1 , Figure 2 , Figure 3 , Figure 5A step 101 is provided at the connection between the inner wall of the filter bucket 1 and the MF membrane microfiltration plate 19. A sealing gasket 16 is provided between the fixing ring 20 and the step 101 to seal and isolate the upper and lower spaces of the MF membrane microfiltration plate 19. The inner wall of the filter bucket 1 located above the step 101 has an internal thread 21, and the outer wall of the top cover 12 has an external thread 18. The outer wall of the fixing ring 20 has an external thread. The top cover 12 and the fixing ring 20 are screwed to the filter bucket 1 respectively. The screw-on connection makes it easy to open the top cover 12 to replace the MF membrane microfiltration plate 19. The MF membrane microfiltration plate 19 has an upward convex arc shape in the middle, and the longitudinal section of the MF membrane microfiltration plate 19 has an upward arched arc shape. The arc shape of the MF membrane microfiltration plate 19 can increase the contact area with the liquid and improve the microfiltration efficiency. The pressure plate 22 has an upward convex arc shape in the middle, and the arc degree of the pressure plate 22 is the same as that of the MF membrane microfiltration plate 19.

[0033] Example 3:

[0034] refer to Figure 1 , Figure 2 An adjustable support foot 6 is provided at each of the four corners of the bottom of the base 5, and a level 7 is provided on the top surface of the base 5. The levelness of the base 5 can be ensured by using the adjustable support foot 6 in conjunction with the level 7.

[0035] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc., are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0036] Secondly, the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0037] Finally, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sterilization system based on MF membrane microfiltration technology, comprising a filter cartridge (1), characterized in that: The bottom of the filter barrel (1) is fixedly mounted on a support plate (2). The bottom of the support plate (2) is mounted on a base (5) via four support shafts (3). The support plate (2) is vertically connected in the middle. A controller (8) is located in the middle of the top surface of the base (5). A hydraulic cylinder (9) is located on the top of the controller (8). A vertical hydraulic shaft (10) is driven and connected to the top of the hydraulic cylinder (9). The top of the hydraulic shaft (10) passes through the bottom of the filter barrel (1) and extends into the barrel. A pressure plate (22) is connected to the top of the hydraulic shaft (10). The pressure plate (22) has a circular cross-section and its sidewall is sealed to the inner wall of the filter barrel (1). An MF membrane is located in the upper middle part of the filter barrel (1). The microfiltration plate (19) consists of two filter screens (1901), a fixing ring (20), and a central shaft (17). The fixing ring (20) surrounds the filter screen (1901). The central shaft (17) is vertically arranged and connects the two filter screens (1901) vertically. Several layers of fiber ester microporous filter membranes (1902) are provided between the two filter screens (1901). The top of the filter bucket (1) is provided with a top cover (12), and the top of the top cover (12) is provided with a crank handle (11). An inlet pipe (13) is connected to the lower part of the side wall of the filter bucket (1), and an outlet pipe (15) is connected to the side wall of the filter bucket (1) above the MF membrane microfiltration plate (19).

2. The sterilization system based on MF membrane microfiltration technology according to claim 1, characterized in that: The inner wall of the filter barrel (1) is provided with a step (101) at the connection between it and the MF membrane microfiltration plate (19). The inner wall of the filter barrel (1) located above the step (101) has an internal thread (21). The outer wall of the top cover (12) has an external thread (18). The outer wall of the fixing ring (20) has an external thread. The top cover (12) and the fixing ring (20) are screwed to the filter barrel (1) respectively.

3. The sterilization system based on MF membrane microfiltration technology according to claim 1, characterized in that: The MF membrane microfiltration plate (19) has an upward convex arc shape in the middle, and the longitudinal section of the MF membrane microfiltration plate (19) has an upward arched arc shape.

4. The sterilization system based on MF membrane microfiltration technology according to claim 1, characterized in that: A sealing gasket (16) is provided between the fixing ring (20) and the step (101).

5. The sterilization system based on MF membrane microfiltration technology according to claim 1, characterized in that: The pressure plate (22) has an upward convex arc shape in the middle, and the arc of the pressure plate (22) is the same as that of the MF membrane microfiltration plate (19).

6. The sterilization system based on MF membrane microfiltration technology according to claim 1, characterized in that: A sealing ring (2201) is provided around the side wall of the pressure plate (22).

7. The sterilization system based on MF membrane microfiltration technology according to claim 1, characterized in that: The base (5) has an adjustable support foot (6) at each of the four corners of its bottom.

8. The sterilization system based on MF membrane microfiltration technology according to claim 1, characterized in that: A level (7) is provided on the top surface of the base (5).

9. The sterilization system based on MF membrane microfiltration technology according to claim 1, characterized in that: The base (5) has a hanging ring (4) at each of the four corners of its top surface.

10. The sterilization system based on MF membrane microfiltration technology according to claim 1, characterized in that, A counterflow valve (14) is provided on the inlet pipe (13).

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