CN112108010B

CN112108010B - Production method of disc tube type reverse osmosis membrane element

Info

Publication number: CN112108010B
Application number: CN202010780896.5A
Authority: CN
Inventors: 李方越; 谢军英
Original assignee: Jiangsu Kunyi Environmental Technology Co ltd
Current assignee: Jiangsu Kunyi Environmental Technology Co ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2022-04-26
Anticipated expiration: 2040-08-06
Also published as: CN112108010A

Abstract

The invention discloses a production method of a disc tube type reverse osmosis membrane element, and relates to the technical field of disc tube type reverse osmosis membranes. The disc tube type reverse osmosis membrane element comprises membrane bags and a diversion disc, wherein the membrane bags and the diversion disc are arranged at intervals in a stacked mode, and both the membrane bags and the diversion disc are provided with central holes; the membrane bag is composed of two DTRO membranes, the two DTRO membranes are oppositely jointed and welded on the outer periphery, the inner periphery corresponding to the central hole is open, the two DTRO membranes of the membrane bag are respectively provided with salient points on the outer surfaces thereof, the DTRO membranes are contacted with the flow guide disc through the salient points, and the salient points enable the membrane bag to be supported on the flow guide disc and play a flow blocking and guiding role for fluid flowing between the membrane bag and the flow guide disc. According to the invention, the salient points are printed on the surface of the DTRO membrane which is ultrasonically welded in advance by a 3D printing mode, and the guide plate adopts the optical disk without the salient points, so that the phenomenon that the DTRO membrane is easily punctured by the salient points on the original guide plate is prevented, and the turbulent flow is improved and the filtering efficiency of the membrane is improved.

Description

Production method of disc tube type reverse osmosis membrane element

Technical Field

The invention belongs to the technical field of disc-tube type reverse osmosis membranes, and particularly relates to a production method for a disc-tube type reverse osmosis membrane.

Background

In recent years, the membrane technology is rapidly developed and widely applied to the fields of electric power, metallurgy, petroleum and petrochemical industry, medicine, food, municipal engineering, sewage recycling, seawater desalination and the like, the demand of various engineering on the membrane technology and equipment thereof is rapidly increased, and the disc-tube reverse osmosis membrane component is widely applied to the field of zero-emission application of percolate and strong brine at present.

The traditional membrane bag is formed by welding two DTRO membrane sheets together through ultrasonic welding, the outer circumferences of the two membrane sheets are sealed through ultrasonic welding, the inner circumferences of the two membrane sheets are not welded, the two membrane sheets are similar to a bag and are also called a membrane bag, and the outer surfaces of the membrane sheets are smooth.

Traditional dish tubular membrane module comprises flow guide disc and membrane bag superpose each other, set up a lot of torrent bumps on the flow guide disc, bump on the flow guide disc can improve the guide effect to the fluid, can form guide effect to the fluid on the one hand through the choked flow bump, on the other hand can form the support to the filter membrane (being the membrane bag) with the flow guide disc contact, sewage flows to the membrane bag surface through the flow guide disc, the membrane bag filters sewage, clean water permeates to the membrane bag the inside, sewage still stays outside the membrane bag, but when operating pressure is too high, when the inside and outside pressure difference of membrane bag is great, the DTRO diaphragm is punctured easily to the bump, sewage can follow the damaged department of membrane bag inside entering the membrane bag like this, pollute the cleanliness factor of crossing water, and then influence product water quality and sewage treatment effect.

Disclosure of Invention

The invention aims to provide a disc tube type reverse osmosis membrane element and a production method of the disc tube type reverse osmosis membrane, wherein the salient points on the flow guide disc are printed on the surface of the DTRO membrane welded in advance in an ultrasonic mode in a 3D printing mode without using the DTRO flow guide disc with the salient points, and the DTRO flow guide disc directly adopts an optical disc, so that the problem that the DTRO membrane is easily punctured by the salient points on the original DTRO flow guide disc is solved, and the turbulence action on the membrane is stronger because the salient points guiding the incoming water turbulence are transferred to the membrane, so that the effect of improving the filtration efficiency of the membrane is achieved.

The invention is realized by the following technical scheme:

the disc tube type reverse osmosis membrane element comprises membrane bags and flow guide discs, wherein the membrane bags and the flow guide discs are arranged at intervals in a stacked mode, and both the membrane bags and the flow guide discs are provided with central holes; the membrane bag is composed of two DTRO membranes, the two DTRO membranes are oppositely jointed and welded on the outer periphery, the inner periphery corresponding to the central hole is open, the two DTRO membranes of the membrane bag are respectively provided with salient points on the outer surfaces thereof, the DTRO membranes are contacted with the flow guide disc through the salient points, and the salient points enable the membrane bag to be supported on the flow guide disc and play a flow blocking guiding role for fluid flowing between the membrane bag and the flow guide disc.

Preferably, the deflector is a smooth disc.

The invention relates to a production method of a disc tube type reverse osmosis membrane, which comprises the following steps:

SS01 transfers the welded and punched diaphragm to an adsorption table on a fixing device by using a mechanical arm, and the diaphragm is adsorbed and fixed on the adsorption table;

SS02 uses 3D printing device to print the surface of the film on the fixing device, and prints out the uniformly arranged convex points;

SS03 uses the motor on the fixing device to turn the adsorption platform over one hundred eighty degrees, and turns the membrane over;

the SS04 uses a 3D printing device to print the other surface of the membrane, and when the 3D printing head is used for printing, the 3D printing head penetrates through the printing groove to print the surface of the membrane to print uniformly arranged salient points;

SS05 releases the suction between the film and the suction table, and takes out the printed film by using the robot arm.

Further, the fixing device comprises an adsorption platform, a turnover mechanism and an exhaust tube, the adsorption platform comprises an outer ring body, a plurality of support edges are uniformly arranged on the inner side of the outer ring body in an annular shape, a printing groove is formed between the two support edges, a plurality of air holes are formed in one surface of each support edge, a cavity is formed in the adsorption platform, and the air holes are communicated with the cavity;

the turnover mechanism comprises a motor and a fixed rod, a fixed block is arranged on one side of the adsorption platform, and the output end of the motor is fixedly connected with the outer side surface of the fixed block;

the device comprises a fixing rod, an adsorption table, a connecting pipe, an exhaust pipe and a sleeve, wherein the sleeve is fixed at one end of the fixing rod, a through shell is fixedly communicated with the other side of the adsorption table, the connecting pipe is fixedly communicated with one side of the through shell, one end of the connecting pipe is located in the sleeve and is rotatably connected with the sleeve, and the exhaust pipe is fixedly communicated with the sleeve.

Further, 3D printing device sets up directly over fixing device, 3D printing device includes the frame, the frame bottom surface is equipped with a set of vertical electric slide rail, and is a set of the transmission is connected with horizontal electric slide rail on the vertical electric slide rail, horizontal electric slide rail output is fixed with the electric push rod, electric push rod output is fixed with 3D and beats printer head.

Further, the width of the printing groove is larger than the outer diameter of the salient point, and the width of the printing groove is 1-2 times of the outer diameter of the salient point.

Furthermore, a braking mechanism is arranged in the motor, and a rotation angle sensor is arranged on a shaft body of the motor.

Furthermore, the connecting pipe is of a hose structure, and an air suction pump is arranged at one end, far away from the through shell, of the connecting pipe.

The invention has the following beneficial effects:

1. according to the invention, the salient points on the flow guide disc are printed on the surface of the DTRO membrane welded in advance in an ultrasonic mode in a 3D printing mode, and the DTRO flow guide disc with the salient points is not required, so that the problem that the DTRO membrane is easily punctured by the salient points on the original DTRO flow guide disc is prevented, the filtering efficiency of the membrane can be improved, the tendency of dirt blocking and scaling of the membrane by dirt is further inhibited, and the production process is simpler and the production efficiency and the cost are greatly reduced because the DTRO flow guide disc does not need the salient points any more.

2. According to the invention, the 3D printing mode is adopted, the salient points on the original flow guide disc are printed on the surface of the traditional DTRO membrane welded by ultrasonic waves, the preparation method and the design structure of the DTRO membrane are novel, the salient points on the DTRO membrane can be accurately controlled, and the problems that when the operation pressure of the DTRO membrane is overhigh and the pressure difference is large, the DTRO membrane is easily punctured by the salient points on the flow guide disc, the water quality of produced water is further influenced, and the sewage treatment effect is further influenced are solved.

3. According to the invention, through designing the fixing device, the printing of the salient points on the two surfaces of the diaphragm is facilitated, meanwhile, the quick switching of the two surfaces of the diaphragm can be realized, and meanwhile, the diaphragm is fixed in a pneumatic adsorption mode, so that the problem of damage to the diaphragm is avoided while the diaphragm is convenient to fix and dismount.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a view of an original flow guiding plate with bumps;

FIG. 2 is a prior art film bag without bumps;

FIG. 3 is a schematic view of the structure of the fixture and the membrane of the present invention;

FIG. 4 is a schematic structural view of a joint between a fixing rod and an adsorption table;

FIG. 5 is a schematic top view of the fixing device;

FIG. 6 is a schematic view of the fixing device from the bottom;

in the drawings, the components represented by the respective reference numerals are listed below:

1-membrane, 2-fixing device, 3-adsorption platform, 4-air extraction pipe, 5-fixing rod, 6-motor, 101-salient point, 301-outer ring body, 302-edge, 303-printing groove, 304-air hole, 305-cavity, 306-fixing block, 307-through shell, 308-connecting pipe and 501-sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The structure of the disc-tube reverse osmosis membrane can be seen in a flow channel disc-tube reverse osmosis membrane component disclosed in the publication number CN109574149A, and comprises a membrane shell, a central pull rod, a flow guide disc and a membrane bag which are arranged in the membrane shell, wherein the flow guide disc and the membrane bag are sequentially and circularly overlapped to form the reverse osmosis membrane, the reverse osmosis membrane is sleeved on the central pull rod, the lower end of the central pull rod is used as a water production end and is connected with a permeate liquid joint, a sealing shaft sleeve, an upper end flange, an upper supporting terminal flange and an upper supporting plate are sequentially sleeved on the central pull rod above the reverse osmosis membrane from bottom to top, the sealing shaft sleeve, the lower end flange and a lower supporting plate are sequentially sleeved on the central pull rod below the reverse osmosis membrane from top to bottom, the upper supporting plate and the lower supporting plate are positioned outside the membrane shell, a plurality of pressure-bearing pull rods are tensioned between the upper supporting plate and the lower supporting plate, and the plurality of pressure-bearing pull rods are uniformly arranged outside the membrane shell, and locking nuts are arranged at two ends of the central pull rod, so that the whole membrane module is fixedly connected, and a raw water joint and a concentrated solution joint are arranged on the lower supporting plate.

The membrane bag and the flow guide plate are core elements of the disc-tube type reverse osmosis membrane component. The traditional membrane bag is formed by welding two pieces of DTRO membrane sheets together through ultrasonic welding (the outer circumferences of the two pieces of membrane sheets are sealed through ultrasonic welding, the inner circumferences of the two pieces of membrane sheets are not welded, and the two pieces of membrane sheets are similar to a bag and are also called a membrane bag), and the outer surfaces of the membrane sheets are smooth. The traditional disc-tube membrane component is formed by mutually overlapping a flow guide disc and a membrane bag. Set up a lot of torrent bumps on the guiding disk, the bump on the guiding disk can improve the guide effect to the fluid, can form the guide effect to the fluid on the one hand through the choked flow bump, and on the other hand can form the support to the filter membrane (being the membrane bag) with the guiding disk contact, and sewage flows to the membrane bag surface through the guiding disk, and the membrane bag filters sewage, and clean water permeates the membrane bag the inside, and sewage still stays outside the membrane bag. However, when the operation pressure is too high and the pressure difference between the inside and the outside of the membrane bag is large, the DTRO membrane is easily punctured by the salient points, so that sewage enters the inside of the membrane bag from the damaged part of the membrane bag, the cleanliness of filtered water is polluted, and the quality of produced water and the sewage treatment effect are further influenced.

As an improvement, the disc-tube reverse osmosis membrane element in the embodiment still comprises the membrane bags and the flow guide discs, the membrane bags and the flow guide discs are still arranged at intervals in a stacking mode, and the membrane bags and the flow guide discs are provided with central holes so as to realize water production. The membrane bag is composed of two DTRO membranes, the two DTRO membranes are oppositely jointed and welded on the outer periphery, the inner periphery corresponding to the central hole is open, the two DTRO membranes of the membrane bag are respectively provided with salient points on the outer surfaces thereof, the DTRO membranes are contacted with the diversion disc through the salient points, and the salient points enable the membrane bag to be supported on the diversion disc and play a flow-blocking guiding role for fluid flowing between the membrane bag and the diversion disc. The flow guide disc is a smooth disc, namely, salient points are not arranged any more.

The production method of the disc tube type reverse osmosis membrane comprises the following steps:

SS01 transfers the welded and punched diaphragm 1 to an adsorption table 3 on a fixing device 2 by using a mechanical arm, and the diaphragm is adsorbed and fixed on the adsorption table 3;

SS02 uses a 3D printing device to print the surface of the membrane 1 on the fixing device 2 to print uniformly arranged convex points 101;

the SS03 turns the adsorption table 3 by one hundred eighty degrees by using the motor 6 on the fixing device 2, and turns the diaphragm 1;

the SS04 uses a 3D printing device to perform printing processing on the other surface of the membrane 1, and when in printing, a 3D printing head penetrates through the printing groove 303 to perform printing on the surface of the membrane 1 to print uniformly arranged convex points 101;

SS05 releases the suction between the film sheet 1 and the suction table 3, and the printed film sheet 1 is taken out by the robot arm.

As shown in fig. 1-4, the fixing device 2 includes an adsorption platform 3, a turnover mechanism and an exhaust tube 4, the adsorption platform 3 includes an outer ring body 301, a plurality of support edges 302 are uniformly arranged on the inner side of the outer ring body 301 in an annular shape, a printing groove 303 is formed between the two support edges 302, a plurality of air holes 304 are formed on one surface of each support edge 302, a cavity 305 is formed in the adsorption platform 3, and the plurality of air holes 304 are communicated with the cavity 305;

the turnover mechanism comprises a motor 6 and a fixed rod 5, a fixed block 306 is arranged on one side of the adsorption platform 3, and the output end of the motor 6 is fixedly connected with the outer side surface of the fixed block 306;

the fixed pole 5 one end is fixed with sleeve 501, and the fixed intercommunication of absorption platform 3 opposite side has logical shell 307, and the fixed intercommunication of logical shell 307 one side has connecting pipe 308, and connecting pipe 308 one end is located sleeve 501 and rotates with sleeve 501 to be connected, and exhaust tube 4 and sleeve 501 fixed intercommunication.

Wherein, 3D printing device sets up directly over fixing device 2, and 3D printing device includes the frame, and the frame bottom surface is equipped with a set of vertical electric slide rail, and the transmission is connected with horizontal electric slide rail on a set of vertical electric slide rail, and horizontal electric slide rail output is fixed with the electric push rod, and electric push rod output is fixed with 3D and beats printer head.

The width of the printing groove 303 is larger than the outer diameter of the salient point 101, and the width of the printing groove 303 is 1-2 times of the outer diameter of the salient point 101.

Wherein, be equipped with arrestment mechanism in the motor 6, be equipped with the corner sensor on the axis body of motor 6, can restrict the angle of adsorbing platform 3 through setting up arrestment mechanism, can ensure the turned angle who adsorbs platform 3 through the corner sensor.

The connection pipe 308 is a hose structure, and an air pump is disposed at an end of the connection pipe 308 away from the through shell 307.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A production method of a disc tube type reverse osmosis membrane element is characterized by comprising the following steps: the method comprises the following steps:

SS 01: the two DTRO membranes are combined and ultrasonically welded on the outer peripheries, then the center hole is punched, the membrane (1) which is welded and punched is transferred to an adsorption table (3) on a fixing device (2) by using a mechanical arm and is adsorbed and fixed on the adsorption table (3);

SS 02: printing the surface of the membrane (1) on the fixing device (2) by using a 3D printing device to print uniformly arranged salient points (101);

SS 03: turning the adsorption table (3) by one hundred and eighty degrees by using a motor (6) on the fixing device (2), and turning the diaphragm (1) over;

SS 04: printing the other surface of the membrane (1) by using the 3D printing device, wherein a 3D printing head penetrates through a printing groove (303) to print the surface of the membrane (1) during printing, and uniformly arranged salient points (101) are printed;

SS 05: releasing the adsorption between the membrane (1) and the adsorption table (3), and taking out the printed membrane (1) by using a mechanical arm;

the fixing device (2) comprises the adsorption platform (3), a turnover mechanism and an exhaust tube (4), the adsorption platform (3) comprises an outer ring body (301), a plurality of support edges (302) are uniformly arranged on the inner side of the outer ring body (301) in an annular shape, the printing groove (303) is formed between the two support edges (302), a plurality of air holes (304) are formed in one surface of each support edge (302), a cavity (305) is formed in the adsorption platform (3), and the air holes (304) are communicated with the cavity (305);

the turnover mechanism comprises a motor (6) and a fixed rod (5), a fixed block (306) is arranged on one side of the adsorption platform (3), and the output end of the motor (6) is fixedly connected with the outer side surface of the fixed block (306);

the device is characterized in that a sleeve (501) is fixed at one end of the fixing rod (5), a through shell (307) is fixedly communicated with the other side of the adsorption platform (3), a connecting pipe (308) is fixedly communicated with one side of the through shell (307), one end of the connecting pipe (308) is located in the sleeve (501) and is rotatably connected with the sleeve (501), and the exhaust pipe (4) is fixedly communicated with the sleeve (501).

2. The production method according to claim 1, wherein the 3D printing device is arranged right above the fixing device (2), the 3D printing device comprises a frame, a set of longitudinal electric sliding rails is arranged on the bottom surface of the frame, a set of transverse electric sliding rails is in transmission connection with the longitudinal electric sliding rails, an electric push rod is fixed at the output end of the transverse electric sliding rails, and the 3D printing head is fixed at the output end of the electric push rod.

3. The production method according to claim 1, wherein the width of the printing groove (303) is larger than the outer diameter of the bump (101), and the width of the printing groove (303) is 1-2 times the outer diameter of the bump (101).

4. The production method according to claim 1, characterized in that a brake mechanism is arranged in the motor (6), and a rotation angle sensor is arranged on a shaft body of the motor (6).

5. The production method according to claim 1, wherein the connecting pipe (308) is a hose structure, and an end of the connecting pipe (308) away from the through shell (307) is provided with a suction pump.