A nanofiltration membrane module device with anti-blocking structure

Abstract

The utility model discloses a nanofiltration membrane module device with prevent stifled structure relates to nanofiltration membrane separation field, including nanofiltration membrane body, install shell and prefiltering subassembly, install shell is cylindrical, and the water inlet end of nanofiltration membrane body is provided with internal thread groove, and one side of install shell is integrally provided with external thread board, and external thread board is connected with internal thread groove, and the center of one side of install shell near nanofiltration membrane body is communicated with the liquid outlet pipe, and the liquid outlet pipe inserts the water inlet of nanofiltration membrane body, and the outer wall of liquid outlet pipe and the inner wall of water inlet of nanofiltration membrane body are closely contacted, and prefiltering subassembly sets up in install shell and can detachable connection, and prefiltering subassembly is used to reduce the impurity content of entering nanofiltration membrane body, and prefiltering subassembly can also be regularly replaced. The utility model is used for intercepting big particle and smaller particle size impurity, can effectively reduce the impurity content of entering nanofiltration membrane module, reduces the possibility of nanofiltration membrane blockage from the source.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of nanofiltration membrane separation, specifically a nanofiltration membrane assembly device with an anti-clogging structure. Background Technology

[0002] Nanofiltration membranes are a type of functional semi-permeable membrane that allows solvent molecules, specific low-molecular-weight solutes, or low-valence ions to pass through. As a type of separation membrane with special properties and broad prospects, the clogging problem of nanofiltration membrane modules has always been a key factor restricting their efficient operation and long-term stable use in many fields where nanofiltration membrane separation technology is widely used.

[0003] Currently, although some nanofiltration membrane modules use methods such as regular chemical cleaning and backwashing to alleviate clogging problems, these methods have certain limitations. Chemical cleaning may damage the nanofiltration membrane and affect its service life; backwashing is not effective in removing some stubborn pollutants, and frequent backwashing will increase energy and water consumption. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a nanofiltration membrane module device with an anti-clogging structure to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A nanofiltration membrane module device with an anti-clogging structure includes a nanofiltration membrane body, a mounting shell, and a pre-filter assembly. The mounting shell is cylindrical. The water inlet end of the nanofiltration membrane body is provided with an internal threaded groove. An external threaded plate extends integrally from one end face of the mounting shell. The external threaded plate is threadedly connected to the internal threaded groove of the nanofiltration membrane body, and an outlet pipe is connected to the center of the end face. The outlet pipe is inserted into the inlet of the nanofiltration membrane body, and the outer wall of the outlet pipe is in close contact with the inner wall of the inlet of the nanofiltration membrane body. The pre-filter assembly is detachably inserted into the liquid passage between the two end faces of the mounting housing, and the pre-filter assembly is used to reduce the impurity content entering the nanofiltration membrane body.

[0006] Specifically, the pre-filter assembly includes an arc-shaped plate, a sealing plate fixed to the inner arc surface of the arc-shaped plate, three insertion sockets evenly fixed to the inner arc surface of the sealing plate, and filter screens inserted into the slots of the three insertion sockets. A through groove is opened on the side wall of the mounting shell, the sealing plate matches the through groove, and a sealing gasket is provided on the outer wall of the sealing plate to contact the inner wall of the through groove. The outer walls of the three filter screens are in close contact with the inner wall of the mounting shell.

[0007] Specifically, in this technical solution, a liquid inlet pipe is connected to the center of the end face of the mounting shell away from the external threaded plate; The three filter screens have different pore sizes, and the pore sizes of the three filter screens decrease sequentially along the direction from the inlet pipe to the outlet pipe.

[0008] Specifically, in this technical solution, the inner arc surface of the arc plate contacts the outer wall of the mounting shell, the side wall of the mounting shell is provided with positioning studs, the arc plate has holes corresponding to the positioning studs, the end of the positioning stud passes through the hole and is threaded with a nut, the nut presses the arc plate tightly onto the side wall of the mounting shell, and seals the through groove.

[0009] Specifically, in this technical solution, the arc length of the arc-shaped plate is greater than the arc length of the sealing plate.

[0010] Specifically, in this technical solution, a first sealing ring is provided between the outer wall of the liquid outlet pipe and the inner wall of the inlet of the nanofiltration membrane body; The mounting shell has a groove on its outer wall near the external threaded plate, and a second sealing ring is fitted in the groove. The second sealing ring is used for sealing when the external threaded plate is threadedly connected to the internal threaded groove.

[0011] In summary, the present invention has the following advantages: a pre-filter assembly is set at the water inlet of the nanofiltration membrane module, which is composed of multiple layers of filter screens with different pore sizes. It is used to intercept large particulate impurities, such as silt and suspended solids, as well as filter out smaller particulate impurities such as colloids and microorganisms. Through this combination of multiple filter screens, the impurity content entering the nanofiltration membrane module can be effectively reduced, thereby reducing the possibility of nanofiltration membrane clogging from the source. Meanwhile, the pre-filter assembly is designed with a detachable structure, making it convenient to clean or replace the filter regularly to ensure that its filtration effect remains good at all times. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall connection of this utility model; Figure 2 This is a schematic diagram showing the separation of the nanofiltration membrane body and the mounting shell of this utility model; Figure 3 This is a schematic diagram of the split front axis structure of the pre-filter assembly of this utility model; Figure 4 This is a schematic diagram of the split oblique axis structure of the pre-filter assembly of this utility model.

[0013] Figure Descriptions: 1. Nanofiltration membrane body; 101. Internal threaded groove; 2. Mounting shell; 201. Liquid outlet pipe; 2011. First sealing ring; 202. External threaded plate; 203. Second sealing ring; 204. Through groove; 205. Stud; 206. Liquid inlet pipe; 207. Groove; 3. Pre-filter assembly; 301. Arc-shaped plate; 3011. Hole; 302. Sealing plate; 303. Connector; 304. Filter screen; 4. Nut. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0015] The embodiments of this utility model will be described below based on its overall structure.

[0016] In this embodiment, please refer to Figures 1-3 As shown, a nanofiltration membrane module device with an anti-clogging structure includes a nanofiltration membrane body 1, a mounting shell 2, and a pre-filter assembly 3. The mounting shell 2 is cylindrical. The water inlet end of the nanofiltration membrane body 1 is provided with an internal threaded groove 101. An external threaded plate 202 is integrally extended from one end face of the mounting shell 2. The external threaded plate 202 is threadedly connected to the internal threaded groove 101 of the nanofiltration membrane body 1, and an outlet pipe 201 is connected to the center of the end face. A groove 207 is provided on the outer wall of the mounting shell 2 near the external threaded plate 202. A second sealing ring 203 is sleeved in the groove 207. The second sealing ring 203 is used for sealing when the external threaded plate 202 is threadedly connected to the internal threaded groove 101. The outlet pipe 201 is inserted into the inlet of the nanofiltration membrane body 1. The outer wall of the outlet pipe 201 is in close contact with the inner wall of the inlet of the nanofiltration membrane body 1. A first sealing ring 2011 is provided between the outer wall of the outlet pipe 201 and the inner wall of the inlet of the nanofiltration membrane body 1. The pre-filter assembly 3 is detachably inserted into the liquid passage between the two end faces of the mounting housing 2. The pre-filter assembly 3 is used to reduce the impurity content entering the nanofiltration membrane body 1.

[0017] During installation, the operator first places the second sealing ring 203 in the groove 207 on the outer wall of the mounting shell 2 near the external threaded plate 202. Then, the operator aligns the external threaded plate 202 of the mounting shell 2 with the internal threaded groove 101 at the water inlet of the nanofiltration membrane body 1. By rotating the mounting shell 2 clockwise, the external threaded plate 202 and the internal threaded groove 101 are threadedly connected until they fit tightly. At this time, the outlet pipe 201 will be inserted into the water inlet of the nanofiltration membrane body 1, and the first sealing ring 2011 will be in close contact with the outer wall of the water inlet of the nanofiltration membrane body 1. The outer wall of the second sealing ring 203 will be in close contact with the water inlet of the nanofiltration membrane body 1, further enhancing the sealing effect. Next, the three filter screens 304 in the pre-filter assembly 3 are pushed into the interior of the mounting shell 2 through the through groove 204, and sealed and fixed by the sealing plate 302 and the arc plate 301 to prevent liquid from leaking from the gaps. At the same time, the outer walls of the three filter screens 304 are in close contact with the inner wall of the mounting shell 2 to ensure that all liquids are filtered by the filter screens 304. Finally, the liquid inlet pipe 206 is connected to the main water pipe to complete the installation. The liquid to be filtered is introduced into the mounting housing 2 through the inlet pipe 206. The liquid first passes through the three filter screens 304 with different pore sizes of the pre-filter assembly 3 for graded filtration. The outer filter screen 304 with larger pore size intercepts large particles of impurities, the middle filter screen 304 further filters smaller particles, and the inner filter screen 304 with the smallest pore size blocks even finer impurities, reducing the impurity content entering the nanofiltration membrane body 1. The liquid that has passed the pre-filtration enters the nanofiltration membrane body 1 through the outlet pipe 201 for the subsequent nanofiltration membrane filtration process. Therefore, a pre-filter assembly 3 is set up, which consists of multiple layers of filter screens with different pore sizes. It is used to intercept large particulate impurities, such as silt and suspended solids, as well as filter out smaller particles such as colloids and microorganisms. Through this combination of multiple filter screens, the impurity content entering the nanofiltration membrane assembly can be effectively reduced, thereby reducing the possibility of nanofiltration membrane clogging from the source.

[0018] Please see Figures 2-4 As shown, the pre-filter assembly 3 includes an arc-shaped plate 301, a sealing plate 302 is fixed on the inner arc surface of the arc-shaped plate 301, three plug-in seats 303 are evenly fixed on the inner arc surface of the sealing plate 302, and filter screens 304 are inserted into the slots of the three plug-in seats 303. A through groove 204 is opened on the side wall of the mounting shell 2. The sealing plate 302 matches the through groove 204, and a sealing gasket is provided on the outer wall of the sealing plate 302 that contacts the inner wall of the through groove 204. The outer walls of the three filter screens 304 are in close contact with the inner wall of the mounting shell 2. An inlet pipe 206 is connected to the center of the end face of the mounting shell 2 away from the external thread plate 202. The apertures of the three filter screens 304 are different, and the apertures of the three filter screens 304 decrease sequentially along the direction from the inlet pipe 206 to the outlet pipe 201. The inner arc surface of the arc plate 301 contacts the outer wall of the mounting shell 2. The side wall of the mounting shell 2 is provided with a positioning stud 205. The arc plate 301 has holes 3011 that correspond one-to-one with the positioning studs 205. The end of the positioning stud 205 passes through the hole 3011 and is threaded with a nut 4. The nut 4 presses the arc plate 301 tightly onto the side wall of the mounting shell 2, sealing the through groove 204. The arc length of the arc plate 301 is greater than the arc length of the sealing plate 302.

[0019] During installation, insert three filter screens 304 with different apertures into the slots of the three plug-in seats 303 that are evenly fixed on the inner arc surface of the sealing plate 302, ensuring that the filter screens 304 are firmly installed and will not easily fall off. Align the sealing plate 302 with the filter screens 304 installed with the through groove 204 on the lower surface of the mounting shell 2, so that the sealing plate 302 can be smoothly inserted into the through groove 204. Since the outer wall of the sealing plate 302 is bonded with a sealing gasket, the sealing between the sealing plate 302 and the through groove 204 can be guaranteed after insertion, preventing liquid from leaking from the gap. At the same time, the outer wall of the three filter screens 304 is in close contact with the inner wall of the mounting shell 2, ensuring that all liquids are filtered by the filter screens 304. The inner arc surface of the arc plate 301 is attached to the outer wall of the mounting shell 2, and the holes 3011 at both ends of the arc plate 301 are aligned and fitted onto the symmetrical studs 205 fixed on both sides of the mounting shell 2. Then, nuts 4 are installed on each stud 205 and tightened with a wrench or other tools to firmly fix the arc plate 301 to the mounting shell 2. The arc length of the arc plate 301 is greater than the arc length of the sealing plate 302. This design helps to better fix the sealing plate 302 and the filter screen 304 and enhance the stability of the overall structure. During the operation of the device, the filtration effect of the pre-filter component 3 should be checked regularly, and the accumulation of impurities on the surface of the filter screen 304 should be observed. If the filter screen 304 is found to be severely clogged, affecting the liquid flow rate, it should be dealt with in a timely manner. When the filter screen 304 needs to be replaced, first unscrew the nut 4, remove the arc plate 301 from the mounting shell 2, then remove the sealing plate 302 from the through groove 204, pull out the old filter screen 304 from the plug-in 303, and replace it with a new filter screen 304. The installation process is the reverse of the disassembly process. Reinsert the sealing plate 302 into the through groove 204, install the arc plate 301 and tighten the nut 4. By regularly replacing the filter screen 304, the pre-filter assembly 3 can be ensured to always maintain good filtration performance, effectively prevent the nanofiltration membrane body 1 from clogging, and ensure the stable operation of the entire nanofiltration membrane assembly device.

[0020] The working principle of this utility model is as follows: During installation, the operator first places the second sealing ring 203 in the groove 207 on the outer wall of the mounting shell 2 near the external threaded plate 202. Then, the operator aligns the external threaded plate 202 of the mounting shell 2 with the internal threaded groove 101 at the water inlet of the nanofiltration membrane body 1. By rotating the mounting shell 2 clockwise, the external threaded plate 202 and the internal threaded groove 101 are threadedly connected until they fit tightly. At this time, the outlet pipe 201 will be inserted into the water inlet of the nanofiltration membrane body 1, and the first sealing ring 2011 will be in close contact with the outer wall of the water inlet of the nanofiltration membrane body 1. The outer wall of the second sealing ring 203 will be in close contact with the water inlet of the nanofiltration membrane body 1, further enhancing the sealing effect. Next, insert three filter screens 304 with different apertures into the slots of the three plug-in seats 303 that are evenly fixed on the inner arc surface of the sealing plate 302, ensuring that the filter screens 304 are firmly installed and will not easily fall off. Align the sealing plate 302 with the filter screens 304 installed with the through groove 204 on the lower surface of the mounting shell 2, so that the sealing plate 302 can be smoothly inserted into the through groove 204. Since the outer wall of the sealing plate 302 is bonded with a sealing gasket, the sealing between the sealing plate 302 and the through groove 204 can be guaranteed after insertion, preventing liquid from leaking from the gap. At the same time, the outer wall of the three filter screens 304 is in close contact with the inner wall of the mounting shell 2, ensuring that all liquids are filtered by the filter screens 304. The inner arc surface of the arc plate 301 is attached to the outer wall of the mounting shell 2. The holes 3011 at both ends of the arc plate 301 are aligned and fitted onto the symmetrical studs 205 fixed on both sides of the mounting shell 2. Then, nuts 4 are installed on each stud 205. The nuts 4 are tightened with a wrench or other tools to firmly fix the arc plate 301 onto the mounting shell 2. Finally, the liquid inlet pipe 206 is connected to the main water supply pipe to complete the installation. The liquid to be filtered is introduced into the mounting housing 2 through the inlet pipe 206. The liquid first passes through three filter screens 304 with different pore sizes of the pre-filter assembly 3 for graded filtration. The outer filter screen 304 with larger pore size intercepts large particles of impurities, the middle filter screen 304 further filters smaller particles, and the inner filter screen 304 with the smallest pore size blocks even finer impurities, reducing the impurity content entering the nanofiltration membrane body 1. The liquid that has passed the pre-filtration enters the nanofiltration membrane body 1 through the outlet pipe 201 for the subsequent nanofiltration membrane filtration process.

[0021] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A nanofiltration membrane module device with an anti-clogging structure, comprising a nanofiltration membrane body (1), a mounting shell (2), and a pre-filter assembly (3), characterized in that, The mounting shell (2) is cylindrical. The water inlet end of the nanofiltration membrane body (1) is provided with an internal threaded groove (101). An external threaded plate (202) is integrally extended from one end face of the mounting shell (2). The external threaded plate (202) is threadedly connected to the internal threaded groove (101) of the nanofiltration membrane body (1), and an outlet pipe (201) is connected at the center of the end face. The outlet pipe (201) is inserted into the inlet of the nanofiltration membrane body (1), and the outer wall of the outlet pipe (201) is in close contact with the inner wall of the inlet of the nanofiltration membrane body (1). The pre-filter assembly (3) is detachably inserted into the liquid passage between the two end faces of the mounting housing (2), and the pre-filter assembly (3) is used to reduce the impurity content entering the nanofiltration membrane body (1).

2. The nanofiltration membrane module device with an anti-clogging structure according to claim 1, characterized in that, The pre-filter assembly (3) includes an arc plate (301), a sealing plate (302) is fixed on the inner arc surface of the arc plate (301), and three plug-in seats (303) are evenly fixed on the inner arc surface of the sealing plate (302). Filter screens (304) are inserted into the slots of the three plug-in seats (303). A through groove (204) is opened on the side wall of the mounting shell (2). The sealing plate (302) matches the through groove (204), and a sealing gasket is provided on the outer wall of the sealing plate (302) to contact the inner wall of the through groove (204). The outer walls of the three filter screens (304) are in close contact with the inner wall of the mounting shell (2).

3. A nanofiltration membrane module device with an anti-clogging structure according to claim 2, characterized in that, The mounting housing (2) has an inlet pipe (206) connected to the center of the end face away from the external thread plate (202). The three filter screens (304) have different pore sizes, and the pore sizes of the three filter screens (304) decrease sequentially along the direction from the inlet pipe (206) to the outlet pipe (201).

4. A nanofiltration membrane module device with an anti-clogging structure according to claim 2, characterized in that, The inner arc surface of the arc plate (301) is in contact with the outer wall of the mounting shell (2). The side wall of the mounting shell (2) is provided with a positioning stud (205). The arc plate (301) has holes (3011) that correspond one-to-one with the positioning studs (205). The end of the positioning stud (205) passes through the hole (3011) and is threaded with a nut (4).

5. A nanofiltration membrane module device with an anti-clogging structure according to claim 4, characterized in that, The arc length of the arc plate (301) is greater than the arc length of the sealing plate (302).

6. A nanofiltration membrane module device with an anti-clogging structure according to claim 1, characterized in that, A first sealing ring (2011) is provided between the outer wall of the outlet pipe (201) and the inner wall of the inlet of the nanofiltration membrane body (1). The mounting shell (2) has a groove (207) on the outer wall near the external thread plate (202). A second sealing ring (203) is fitted in the groove (207). The second sealing ring (203) is used for sealing when the external thread plate (202) is threadedly connected to the internal thread groove (101).

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