Self-cleaning nanofiltration membrane

Abstract

The utility model provides a self-cleaning nanofiltration membrane, which relates to the technical field of nanofiltration membranes, and comprises a bottom plate, the top of the bottom plate is fixedly connected with a fixing frame, the top of the fixing frame is fixedly provided with a fixing plate, the inner surface wall of the fixing plate is provided with two sliding chutes, the inner surface walls of the two sliding chutes are respectively provided with a sliding block in a sliding and embedded manner, and the sliding blocks are arranged in the sliding chutes. A moving plate is fixedly connected between the outer surface walls of the two sliding blocks, a nanofiltration membrane body is fixedly mounted on one side of the outer wall of the moving plate, and a connecting seat is fixedly mounted on one side of the outer wall of the moving plate. According to the self-cleaning nanofiltration membrane, under the interaction of all the components of the device, the separation of pollutants and the membrane surface can be enhanced, the water flow disturbance effect is enhanced, the pollutants in membrane holes are promoted to be discharged, and the backwashing efficiency is remarkably improved, so that the performance of the self-cleaning nanofiltration membrane is effectively enhanced, and the service life of the nanofiltration membrane can be greatly prolonged; and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nanofiltration membrane technical field especially, relate to a kind of self-cleaning nanofiltration membrane. BACKGROUND

[0002] Nanofiltration membrane is a kind of pressure-driven separation membrane between reverse osmosis membrane and ultrafiltration membrane, its aperture is 1-10nm, can intercept divalent and multivalent ion, part small molecule organic matter, realizes high-efficiency material separation and purification.

[0003] Nanofiltration membrane is applied in water treatment, chemical separation etc. Application scene, because long-term filtration contains organic matter, colloid, microorganism and various ionic fluid, cause contaminant adsorption deposition, membrane hole is blocked, membrane flux drops, so it needs cleaning, to maintain efficient operation, self-cleaning nanofiltration membrane generally utilizes cleaning fluid or cleaning water to nanofiltration membrane backflush, to remove contaminant, restore membrane performance.

[0004] But existing self-cleaning nanofiltration membrane has the following deficiencies:

[0005] In prior art, self-cleaning nanofiltration membrane utilizes backflush and can remove contaminant to a certain extent, however, the binding force between part contaminant and membrane is stronger, such as some organic macromolecule, biological membrane, so that they are difficult to be completely washed out by backflush water, so that membrane surface still has contaminant residue, for a long time, it will cause membrane flux to continue to drop, separation performance reduces, influence nanofiltration membrane service life and work efficiency.

[0006] Therefore, we propose a kind of self-cleaning nanofiltration membrane to solve the problems raised in the above. CONTENT OF UTILITY MODEL

[0007] The utility model aims at providing a kind of self-cleaning nanofiltration membrane, by water pump drive cleaning fluid flows into nanofiltration membrane, carries out backflush operation, simultaneously, with the aid of motor drive and eccentric component transmission, drive nanofiltration membrane to reciprocate vibration, to solve the problems raised in the above background art.

[0008] In order to achieve the above object, the utility model adopts the following technical scheme: a kind of self-cleaning nanofiltration membrane, including bottom plate, the top of the bottom plate is fixedly connected with fixed frame, the top of the fixed frame is fixedly installed with fixed plate, the inner surface wall of the fixed plate is equipped with two sliding grooves, the inner surface wall of two The sliding grooves are slidably embedded with sliding block, the outer surface wall between two The sliding block is fixedly connected with moving plate, the outer wall of the moving plate is fixedly installed with nanofiltration membrane body, the outer wall of the moving plate is fixedly installed with connecting seat, the outer surface wall of the connecting seat is movably sleeved with connecting rod, the inner surface wall of the connecting rod is movably inserted with linkage rod, the outer wall of the linkage rod is fixedly connected with rotating disc, the inner surface wall of the rotating disc is fixedly inserted with drive motor.

[0009] Preferably, the output end of the nanofiltration membrane body is fixedly communicated with a water outlet pipe, an outer surface wall of the water outlet pipe is fixedly communicated with a conveying pipe, an input end of the conveying pipe is fixedly communicated with a water pump, an input end of the water pump is fixedly communicated with a connecting pipe, and an input end of the connecting pipe is fixedly communicated with a liquid storage tank.

[0010] Preferably, a first water valve is arranged on an inner surface wall of the conveying pipe, an input end of the nanofiltration membrane body is fixedly communicated with a water inlet pipe, and second water valves are arranged on inner surface walls of the water outlet pipe and the water inlet pipe.

[0011] Preferably, an outer surface wall of the water inlet pipe is fixedly communicated with a blowdown pipe, and an inner surface wall of the blowdown pipe is provided with a blowdown valve.

[0012] Preferably, an input end of the water inlet pipe is fixedly communicated with a treatment tank, and a coarse filter screen is movably inserted into an inner surface wall of the treatment tank.

[0013] Preferably, a fine filter screen is movably inserted into the inner surface wall of the treatment tank, four threaded grooves are formed in the top of the treatment tank, and fixed bolts are threadedly connected to inner surface walls of the four threaded grooves.

[0014] Preferably, a sealing cover is movably arranged between outer surface walls of the four fixed bolts, and a water supply pipe is fixedly communicated to one side of an outer wall of the treatment tank.

[0015] Compared with the prior art, the utility model has the advantages and positive effects that,

[0016] 1、in the utility model, through the interaction of each component of the device, the cleaning liquid is driven by the water pump to flow into the nanofiltration membrane, and backwashing operation is carried out, at the same time, the nanofiltration membrane is driven to reciprocate by the motor drive and eccentric assembly transmission, in this process, the vibration can strengthen the separation of pollutants and the membrane surface, enhance the water flow disturbance effect, and promote the discharge of pollutants in the membrane hole, significantly improve the backwashing efficiency, the method not only effectively enhances the performance of the self-cleaning nanofiltration membrane, but also greatly prolongs the service life of the nanofiltration membrane and improves the working efficiency.

[0017] 2、in the utility model, through the interaction of each component of the device, the filter assembly can be used for pretreating the water to be filtered, in this process, the filter assembly can first intercept and remove large-particle pollutants in the water to be filtered, so as to reduce the filtration load borne by the nanofiltration membrane body, after pretreatment, the degree of pollution blockage of the nanofiltration membrane in subsequent operation is reduced, thereby effectively prolonging the service life of the nanofiltration membrane. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 a front view structure perspective view of the self-cleaning nanofiltration membrane is provided in the utility model;

[0019] Figure 2 Part structure perspective split view of the self-cleaning nanofiltration membrane is provided in the utility model;

[0020] Figure 3 Part structure side view perspective split view of the self-cleaning nanofiltration membrane is provided in the utility model;

[0021] Figure 4 Part structure overhead perspective split view of the self-cleaning nanofiltration membrane is provided in the utility model.

[0022] Legend: 1, base plate, 2, fixed frame, 3, fixed plate, 4, sliding groove, 5, sliding block, 6, moving plate, 7, nanofiltration membrane body, 8, connecting seat, 9, connecting rod, 10, linkage rod, 11, rotating disc, 12, drive motor, 13, water outlet pipe, 14, conveying pipe, 15, water pump, 16, connecting pipe, 17, liquid storage tank, 18, first water valve, 19, water inlet pipe, 20, second water valve, 21, blowdown pipe, 22, blowdown valve, 23, treatment tank, 24, coarse filter screen, 25, fine filter screen, 26, threaded groove, 27, fixed bolt, 28, sealing cover, 29, water supply pipe. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the drawings and examples. It should be noted that the embodiments of the present application and the features in the examples can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from the description, therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0025] Example 1, as shown in the accompanying drawings Figure 1 - the accompanying drawings Figure 4As shown, the utility model provides a technical scheme: a kind of self-cleaning nanofiltration membrane, including bottom plate 1, the top of bottom plate 1 is fixedly connected with fixed frame 2, the top of fixed frame 2 is fixedly installed with fixed plate 3, the inner surface wall of fixed plate 3 is equipped with two sliding grooves 4, the inner surface wall of two sliding grooves 4 is slidably embedded with sliding block 5, the outer surface wall between two sliding blocks 5 is fixedly connected with moving plate 6, the outer wall one side of moving plate 6 is fixedly installed with nanofiltration membrane body 7, the outer wall one side of moving plate 6 is fixedly installed with connecting seat 8, the outer surface wall of connecting seat 8 is movably sleeved with connecting rod 9, the inner surface wall of connecting rod 9 is movably inserted with linkage rod 10, the outer wall one side of linkage rod 10 is fixedly connected with rotating disc 11, the inner surface wall of rotating disc 11 is fixedly inserted with drive motor 12, the output of nanofiltration membrane body 7 is fixedly communicated with outlet pipe 13, the outer surface wall of outlet pipe 13 is fixedly communicated with conveying pipe 14, the input of conveying pipe 14 is fixedly communicated with water pump 15, the input of water pump 15 is fixedly communicated with connecting pipe 16, the input of connecting pipe 16 is fixedly communicated with liquid storage tank 17.

[0026] The effect achieved by the whole embodiment 1 is: when cleaning nanofiltration membrane, first start water pump 15, water pump 15 extracts cleaning fluid from liquid storage tank 17 and pressurizes, so that cleaning fluid flows into nanofiltration membrane body 7 inside through conveying pipe 14, and carries out flushing operation, at the same time, start drive motor 12, the output of drive motor 12 drives rotating disc 11 to rotate, the eccentric end of the outer wall one side of rotating disc 11 is fixed with linkage rod 10, linkage rod 10 is movably sleeved with connecting rod 9, the rotating movement of rotating disc 11 is thus converted into reciprocating motion of connecting rod 9, connecting rod 9 drives moving plate 6 and nanofiltration membrane body 7 to move synchronously by connecting seat 8, so that nanofiltration membrane body 7 generates reciprocating vibration, which makes the pollutants attached in membrane more easily separate from membrane surface and membrane hole under the dual action of vibration and cleaning fluid flushing, and then makes cleaning process more thorough, effectively improves the cleaning effect and subsequent filtration performance of nanofiltration membrane.

[0027] Embodiment 2, as shown, Figures 2-4 The inner surface wall of conveying pipe 14 is provided with first water valve 18, the input of nanofiltration membrane body 7 is fixedly communicated with water inlet pipe 19, the inner surface wall of outlet pipe 13 and water inlet pipe 19 is provided with second water valve 20, the outer surface wall of water inlet pipe 19 is fixedly communicated with blowdown pipe 21, the inner surface wall of blowdown pipe 21 is provided with blowdown valve 22, the input of water inlet pipe 19 is fixedly communicated with treatment tank 23, the inner surface wall of treatment tank 23 is movably inserted with coarse filter screen 24, the inner surface wall of treatment tank 23 is movably inserted with fine filter screen 25, the top of treatment tank 23 is equipped with four thread grooves 26, the inner surface wall of four thread grooves 26 is all threadedly connected with fixed bolt 27, the outer surface wall between four fixed bolts 27 is movably sleeved with sealing cover 28, the outer wall one side of treatment tank 23 is fixedly communicated with water supply pipe 29.

[0028] The effect achieved by the whole embodiment 2 is that: in use, the water to be filtered is first delivered to the treatment box 23 by the water delivery pipe 29, in the treatment box 23, the coarse filter screen 24 first intercepts the relatively large particle impurities in the water, such as silt, suspended matter and the like, then the fine filter screen 25 further filters out the smaller particle size particles and colloidal substances, the water filtered initially is fed into the nanofiltration membrane body 7 through the water inlet pipe 19 to carry out high-precision ion and small-molecule organic matter interception separation, through this pretreatment mode, the large-particle pollutants in the water to be filtered can be removed first, the filtration burden of the nanofiltration membrane body 7 is reduced, and then the service life of the nanofiltration membrane is effectively prolonged, and loosening the four fixing bolts 27 can conveniently detach the sealing cover 28, the quick cleaning or replacement of the filtration assembly is realized, and the continuous and efficient operation of the pretreatment link is ensured.

[0029] The working principle of the whole device is that: in use, first, a sufficient amount of suitable cleaning liquid is injected into the liquid storage tank 17, the water to be filtered is pumped to the treatment box 23 by the water delivery pipe 29, in the treatment box 23, the coarse filter screen 24 initially intercepts the relatively large particle impurities in the water, such as sand, debris and relatively large block-shaped suspended matter, then the fine filter screen 25 further filters out the smaller particle size particles and colloids, such as fine silt, microbial aggregates and the like, the water filtered initially flows into the nanofiltration membrane body 7 through the water inlet pipe 19 to carry out precise ion and small-molecule organic matter interception separation, and only by loosening the four fixing bolts 27, the sealing cover 28 can be quickly detached, so that the filtration assembly can be conveniently cleaned or replaced, when the nanofiltration membrane needs to be cleaned, the water pump 15 is started, the water pump 15 draws the cleaning liquid from the liquid storage tank 17 and pressurizes the cleaning liquid, so that the cleaning liquid flows into the nanofiltration membrane body 7 through the delivery pipe 14 to carry out flushing operation, at the same time, the driving motor 12 is started, the output end of the driving motor 12 drives the rotating disc 11 to rotate, the rotating disc 11 drives the connecting rod 9 to make reciprocating motion through the linkage rod 10, the connecting rod 9 in turn drives the moving plate 6 and the nanofiltration membrane body 7 to make synchronous reciprocating motion through the connecting seat 8, so that the nanofiltration membrane body 7 produces reciprocating vibration of a certain frequency, which promotes the pollutants attached in the membrane to be more easily separated from the membrane surface and the membrane holes under the dual action of vibration and cleaning liquid flushing, so that higher cleaning effect is achieved.

[0030] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms, any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A self-cleaning nanofiltration membrane, characterized by: The utility model provides a kind of nanofiltration membrane, including bottom plate (1), the top of the bottom plate (1) is fixedly connected with fixed frame (2), the top of the fixed frame (2) is fixedly installed with fixed plate (3), the inner surface wall of the fixed plate (3) is equipped with two sliding grooves (4), the inner surface wall of two The sliding block (5) is slidably embedded in the sliding groove (4), the outer surface wall of two The mobile plate (6) is fixedly connected with the sliding block (5), the outer wall of the mobile plate (6) one side is fixedly installed with nanofiltration membrane body (7), the outer wall of the mobile plate (6) one side is fixedly installed with connecting seat (8), the outer surface wall of the connecting seat (8) is movably sleeved with connecting rod (9), the inner surface wall of the connecting rod (9) is movably inserted with linkage rod (10), the outer wall of the linkage rod (10) one side is fixedly connected with rotary disc (11), the inner surface wall of the rotary disc (11) is fixedly inserted with drive motor (12).

2. The self-cleaning nanofiltration membrane according to claim 1, wherein: The output end of the nanofiltration membrane body (7) is fixedly communicated with water outlet pipe (13), the outer surface wall of the water outlet pipe (13) is fixedly communicated with conveying pipe (14), the input end of the conveying pipe (14) is fixedly communicated with water pump (15), the input end of the water pump (15) is fixedly communicated with connecting pipe (16), the input end of the connecting pipe (16) is fixedly communicated with liquid storage tank (17).

3. The self-cleaning nanofiltration membrane according to claim 2, wherein: The inner surface wall of the conveying pipe (14) is provided with first water valve (18), the input end of the nanofiltration membrane body (7) is fixedly communicated with water inlet pipe (19), the inner surface wall of the water outlet pipe (13) and water inlet pipe (19) is provided with second water valve (20).

4. The self-cleaning nanofiltration membrane according to claim 3, wherein: The outer surface wall of the water inlet pipe (19) is fixedly communicated with blowdown pipe (21), the inner surface wall of the blowdown pipe (21) is provided with blowdown valve (22).

5. The self-cleaning nanofiltration membrane according to claim 4, wherein: The input end of the water inlet pipe (19) is fixedly communicated with treatment tank (23), the inner surface wall of the treatment tank (23) is movably inserted with coarse filter screen (24).

6. The self-cleaning nanofiltration membrane according to claim 5, wherein: The inner surface wall of the treatment tank (23) is movably inserted with fine filter screen (25), the top of the treatment tank (23) is equipped with four threaded grooves (26), and the inner surface wall of the four threaded grooves (26) is threadedly connected with fixed bolt (27).

7. The self-cleaning nanofiltration membrane according to claim 6, wherein: The outer surface wall between the four fixed bolts (27) is movably sleeved with sealing cover (28), and the outer wall of the treatment tank (23) one side is fixedly communicated with water supply pipe (29).

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