Nanofiltration membrane device for seawater desalination

Abstract

The utility model belongs to the technical field of seawater desalination membrane devices, and particularly relates to a nanofiltration membrane device for seawater desalination, which comprises a base, filtering tanks and a nanofiltration membrane, the filtering tanks are connected to two sides of the top end of the base, a water inlet pipeline is butted to the middle of the top end of each filtering tank, and a guide pipe is connected to the top end of each water inlet pipeline. A discharging pipeline is in butt joint with the middle of the bottom end of the filtering tank, a nanofiltration membrane is connected to the middle of the inner wall of the filtering tank through a limiting ring, and an auxiliary mechanism is arranged on the outer wall of the nanofiltration membrane and comprises a splitter plate, a supporting plate, a driving motor, a supporting table, a water suction pump, a jet flow pipeline, a cleaning spray head, a water suction pipeline, an electric push rod, a clamping plate, a limiting column and a fixing plate. A splitter plate is connected to the top end of the inner wall of the filtering tank, a supporting plate is welded to the side, close to the nanofiltration membrane, of the filtering tank, a driving motor is connected to the middle of the supporting plate through a waterproof bin, and a supporting table is welded to the middle of the outer wall of the filtering tank. According to the utility model, the nanofiltration membrane can be conveniently washed and is prevented from being blocked, so that the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to seawater desalination membrane device technical field, concretely is a kind of nanofiltration membrane device for seawater desalination. BACKGROUND

[0002] Seawater desalination refers to the process of removing salt from seawater to make it usable fresh water, and seawater desalination technology is mainly divided into two categories: membrane seawater desalination and thermal seawater desalination. Seawater desalination nanofiltration membrane equipment is a kind of equipment using nanofiltration membrane technology for seawater desalination. Nanofiltration membrane is a kind of semi-permeable membrane, which can selectively permeate certain substances while preventing other substances from passing through. In the process of seawater desalination, nanofiltration membrane can effectively remove salt and other impurities in seawater, so as to obtain fresh water.

[0003] After searching, the patent with publication number CN107661695A discloses a kind of nanofiltration membrane device, this patent includes filter box and the nanofiltration membrane layer located in filter box, the upper and lower ends of the filter box are respectively provided with water inlet pipe and water outlet pipe, the filter box is located in the upper of nanofiltration membrane layer and is provided with water baffle, the water baffle is provided with several evenly arranged water distribution holes. Compared with the prior art, the water entering the filter box through the water baffle is temporarily blocked, the water is dispersed after the water baffle, and finally falls on the nanofiltration membrane layer through the water distribution holes, so that the water can contact each position of the nanofiltration membrane layer, and the water distribution is uniform. This not only improves the overall utilization rate of nanofiltration membrane layer and improves work efficiency, but also solves the problem of blockage of corresponding area on nanofiltration membrane layer due to water accumulation, improves the smoothness of filtration, and ensures good work efficiency.

[0004] But the nanofiltration membrane device in the above-mentioned use process, since the flow direction of seawater and fresh water is single, once any one of seawater and fresh water is blocked, the nanofiltration membrane device cannot work, and the nanofiltration membrane will inevitably be blocked after a period of use, which needs to be cleaned after shutdown, thereby affecting work efficiency. SUMMARY

[0005] The utility model aims at providing a kind of nanofiltration membrane device for seawater desalination to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A nanofiltration membrane device for seawater desalination, including base, filter jar and nanofiltration membrane, the top both sides of base are connected with filter jar, and the top middle part of filter jar is butt joint with water inlet pipeline, the top of water inlet pipeline is connected with the pipe, and the bottom middle part of filter jar is butt joint with discharge pipeline, the inner wall middle part of filter jar is connected with nanofiltration membrane through the limiting ring, and the outer wall of nanofiltration membrane is provided with auxiliary mechanism, and auxiliary mechanism includes shunt plate, support plate, drive motor, support table, water pump, jet pipeline, cleaning spray head, water suction pipeline, electric push rod, clamping plate, limiting column and fixed plate, the top of filter jar inner wall is connected with shunt plate, the side close to nanofiltration membrane of filter jar is welded with support plate, and the middle part of support plate is connected with drive motor through waterproof bin, and the middle part of the outer wall of filter jar is welded with support table.

[0007] Preferably, the middle part of the conduit is connected with a delivery pipeline, and electromagnetic valves are installed on both sides of the outer wall of the conduit.

[0008] Preferably, the output end of the drive motor is connected with the nanofiltration membrane, and the top of the support table is butt joint with the water pump.

[0009] Preferably, the output end of the water pump is butt joint with the jet pipeline, and the outer wall of the jet pipeline is connected with the cleaning spray head.

[0010] Preferably, the side close to the shunt plate of the filter jar is connected with the water suction pipeline, and the inside of the base is connected with the electric push rod through the mounting seat.

[0011] Preferably, the output end of the electric push rod is butt joint with the clamping plate, and the inside of the clamping plate is slidably connected with the limiting column.

[0012] Preferably, the outer wall of the limiting column is welded with the base on both sides, and the middle part of the top of the base is welded with the fixed plate.

[0013] Preferably, the top of the base is provided with the limiting cavity corresponding to the clamping plate, and the fixed plate is symmetrically distributed about the vertical middle line of the base.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] In order to prevent the nanofiltration membrane 8 from being blocked by impurities contained in seawater, the water pump 905 on the support table 904 is started to make the cleaning water flow to the jet pipe 906, and since the jet pipe 906 is connected with the cleaning nozzle 907, the water can be sprayed to the nanofiltration membrane 8 through the cleaning nozzle 907, so that the sprayed water flow washes the nanofiltration membrane 8, at the same time, the driving motor 903 on the support plate 902 is started, the output end of the driving motor 903 drives the nanofiltration membrane 8 to rotate, so that the water flow washing area changes constantly, at this time, the water flow flows from the permeation side of the nanofiltration membrane 8 to the raw material side, so as to wash away the loose deposits and prevent the nanofiltration membrane 8 from being blocked, thereby improving the working efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a front view of the structure of the present application.

[0018] Figure 2 It is a sectional view of the structure of the present application.

[0019] Figure 3 It is a top view of the structure of the filter tank of the present application.

[0020] Figure 4 It is a sectional view of the structure of the filter tank of the present application.

[0021] Figure 5 It is a structure of the auxiliary mechanism of the present application.

[0022] Figure 6 It is a structure of the clamping plate of the present application.

[0023] In the figure: 1, base; 2, filter tank; 3, water inlet pipe; 4, guide pipe; 5, electromagnetic valve; 6, conveying pipe; 7, discharge pipe; 8, nanofiltration membrane; 9, auxiliary mechanism; 901, flow dividing plate; 902, support plate; 903, driving motor; 904, support table; 905, water pump; 906, jet pipe; 907, cleaning nozzle; 908, water suction pipe; 909, electric push rod; 910, clamping plate; 911, limiting column; 912, fixed plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-6 The utility model provides a technical scheme: a kind of nanofiltration membrane device for seawater desalination, including base 1, filter tank 2 and nanofiltration membrane 8, the top of base 1 both sides is connected with filter tank 2, and the top of filter tank 2 middle part is docked with inlet water pipeline 3, the top of inlet water pipeline 3 is connected with pipe 4, and the bottom of filter tank 2 middle part is docked with discharge pipeline 7, the inner wall of filter tank 2 middle part is connected with nanofiltration membrane 8 by limit ring, and the outer wall of nanofiltration membrane 8 is provided with auxiliary mechanism 9, auxiliary mechanism 9 includes shunt plate 901, support plate 902, drive motor 903, support table 904, water pump 905, jet pipeline 906, cleaning nozzle 907, water pumping pipeline 908, electric push rod 909, clamping plate 910, limit column 911 and fixed plate 912, the top of filter tank 2 inner wall is connected with shunt plate 901, support plate 902 is welded on the side of filter tank 2 close to nanofiltration membrane 8, and the middle part of support plate 902 is connected with drive motor 903 by waterproof bin, the middle part of the outer wall of filter tank 2 is welded with support table 904;The middle part of pipe 4 is connected with conveying pipeline 6, and electromagnetic valve 5 is installed on the both sides of the outer wall of pipe 4, and flow guide hole is formed in the inside of shunt plate 901;The output end of drive motor 903 is connected with nanofiltration membrane 8, and the top of support table 904 is docked with water pump 905;The output end of water pump 905 is docked with jet pipeline 906, and the outer wall of jet pipeline 906 is connected with cleaning nozzle 907;Water pumping pipeline 908 is connected on the side of filter tank 2 close to shunt plate 901, and electric push rod 909 is connected in the inside of base 1 by mounting seat;The output end of electric push rod 909 is docked with clamping plate 910, and limit column 911 is slidably connected in the inside of clamping plate 910;The outer wall of limit column 911 both sides is welded with base 1, and fixed plate 912 is welded on the middle part of the top of base 1;Limit cavity corresponding with clamping plate 910 is formed on the top of base 1, and fixed plate 912 is symmetrically distributed about the vertical center line of base 1;Hole corresponding with cleaning nozzle 907 is formed in the inside of support plate 902, the input end of water pump 905 is connected with water conveying pipeline, and shunt plate 901 is circular table shape.

[0026] In specific implementation, when the seawater is desalinated by using the utility model, the filter tank 2 is hoisted to the top of the base 1, and then the electric push rod 909 is started, the output end of the electric push rod 909 is connected with the clamping plate 910, the electric push rod 909 is retracted, the clamping plate 910 is driven to move, and the clamping plate 910 and the limiting column 911 are connected through sliding, the movement of the clamping plate 910 is guided by the limiting column 911 at this time, until the inner wall of the clamping plate 910 is attached to the outer wall of the bottom of the filter tank 2, the filter tank 2 is limited by the cooperation of the clamping plate 910 and the fixed plate 912, and the stability of the support is enhanced;

[0027] When the seawater and fresh water of one of the filter tanks 2 is blocked, the electromagnetic valve 5 is opened, the guide pipe 4 connected with the electromagnetic valve 5 is closed, the seawater flows to the other filter tank 2, then the seawater reaches the flow distribution plate 901 through the water inlet pipe 3, and then the water flow is dispersed through the flow guide hole in the flow distribution plate 901 and contacts the nanofiltration membrane 8, so that the seawater and the nanofiltration membrane 8 are prevented from being concentrated to affect the filtering effect, the utility model does not need to stop working, only the corresponding guide pipe 4 needs to be switched to desalinate the seawater, so that the working efficiency is improved.

[0028] In order to prevent the nanofiltration membrane 8 from being blocked by impurities contained in the seawater, the water pump 905 on the support table 904 is started, the cleaning water flows to the jet pipe 906, the jet pipe 906 is connected with the cleaning nozzle 907, the water is sprayed to the nanofiltration membrane 8 through the cleaning nozzle 907, the water flow is washed to the nanofiltration membrane 8, the driving motor 903 on the support plate 902 is started at the same time, the output end of the driving motor 903 drives the nanofiltration membrane 8 to rotate, so that the water flow washing area changes constantly, the water flow flows from the permeation side of the nanofiltration membrane 8 to the raw material side, so that the loose deposits are washed away, the nanofiltration membrane 8 is prevented from being blocked, the deposits are sucked away through the water suction pipe 908, so that the nanofiltration membrane 8 is cleaned, the working efficiency is improved.

[0029] In summary, the utility model for using, first through the base 1 is placed in the designated position in filter jar 2, then through the water inlet pipeline 3 is introduced into the inside of filter jar 2 sea water, again through the nanofiltration membrane 8 removes the salt and other impurities in sea water, to obtain fresh water, then fresh water is exported to the next process through the discharge pipeline 7, this is the prior art, do not elaborate here, by setting up auxiliary mechanism 9 makes the utility model stop working, just need to switch the corresponding conduit 4 can make filter jar 2 continue to desalination to sea water, to improve work efficiency, the water flow that is sprayed through the cleaning spray head 907 is washed to nanofiltration membrane 8, water flow flows from the permeation side of nanofiltration membrane 8 to raw material side at this time, to wash away the loose deposit and prevent nanofiltration membrane 8 from being blocked, the contents not described in detail in the description belong to the prior art known to those skilled in the art.

[0030] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features thereof, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A nanofiltration membrane device for seawater desalination, comprising a base (1), a filter tank (2) and a nanofiltration membrane (8), characterized in that: the top end of the base (1) is connected with the filter tank (2) on both sides, and the top end of the filter tank (2) is connected with a water inlet pipeline (3) in the middle, the top end of the water inlet pipeline (3) is connected with a conduit (4), and the bottom end of the filter tank (2) is connected with a discharge pipeline (7) in the middle, the inner wall of the filter tank (2) is connected with the nanofiltration membrane (8) in the middle through a limiting ring, and the outer wall of the nanofiltration membrane (8) is provided with an auxiliary mechanism (9), the auxiliary mechanism (9) comprises a flow dividing plate (901), a support plate (902), a drive motor (903), a support table (904), a water pump (905), a jet pipeline (906), a cleaning nozzle (907), a water pumping pipeline (908), an electric push rod (909), a clamping plate (910), a limiting column (911) and a fixed plate (912), the top end of the inner wall of the filter tank (2) is connected with the flow dividing plate (901), the side of the filter tank (2) close to the nanofiltration membrane (8) is welded with the support plate (902), and the middle of the support plate (902) is connected with the drive motor (903) through a waterproof bin, and the middle of the outer wall of the filter tank (2) is welded with the support table (904).

2. The nanofiltration membrane device for seawater desalination according to claim 1, characterized in that: The middle of the conduit (4) is connected with a conveying pipeline (6), and the outer wall of the conduit (4) is provided with an electromagnetic valve (5) on both sides, and the inner part of the flow dividing plate (901) is provided with a flow guide hole.

3. The nanofiltration membrane device for seawater desalination according to claim 2, characterized in that: The output end of the drive motor (903) is connected with the nanofiltration membrane (8), and the top end of the support table (904) is connected with the water pump (905).

4. The nanofiltration membrane device for seawater desalination according to claim 3, characterized in that: The output end of the water pump (905) is connected with the jet pipeline (906), and the outer wall of the jet pipeline (906) is connected with the cleaning nozzle (907).

5. The nanofiltration membrane device for seawater desalination according to claim 1, characterized in that: The side of the filter tank (2) close to the flow dividing plate (901) is connected with the water pumping pipeline (908), and the inner part of the base (1) is connected with the electric push rod (909) through a mounting seat.

6. The nanofiltration membrane device for seawater desalination according to claim 5, characterized in that: The output end of the electric push rod (909) is connected with the clamping plate (910), and the inner part of the clamping plate (910) is slidably connected with the limiting column (911).

7. The nanofiltration membrane device for seawater desalination according to claim 6, characterized in that: The outer wall of the limiting column (911) is welded with the base (1) on both sides, and the top end of the base (1) is welded with the fixed plate (912) in the middle.

8. The nanofiltration membrane device for seawater desalination according to claim 7, characterized in that: The top end of the base (1) is provided with a limiting cavity corresponding to the clamping plate (910), and the fixed plate (912) is symmetrically distributed about the vertical middle line of the base (1). The top end of the base (1) is provided with a limiting cavity corresponding to the clamping plate (910), and the fixed plate (912) is symmetrically distributed about the vertical middle line of the base (1).

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