A roll-type diffusion dialysis membrane module and a method for manufacturing the same

Abstract

The application discloses a kind of roll type diffusion dialysis membrane module and preparation method thereof, including cylinder, U-shaped tube;U-shaped tube straight pipe part upper end is connected respectively with the inlet and outlet pipe of diffusion liquid and dialysate;Wherein, between a pair of diagonal straight pipe parts, ion exchange membrane is equipped, and both sides of ion exchange membrane are equipped with a flow channel screen, above the pair of diagonal straight pipe parts, by ion exchange membrane and flow channel screen, spiral is wound into cylinder by mutual close, and the end of ion exchange membrane and flow channel screen winding is fixed on another pair of straight pipe parts respectively;Space supported by flow channel screen constitutes fluid channel and is always located at both sides of ion exchange membrane, one side constitutes diffusion liquid flow channel and is connected with a pair of diffusion liquid inlet and outlet connector communication, the other side constitutes dialysate flow channel and is connected with a pair of dialysate inlet and outlet connector communication, the application solves the problem that liquid inlet and outlet are difficult to set when multiple membrane modules are commonly processed in higher integrated degree and mass transfer efficiency is lower.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of membrane separation equipment, and particularly relates to a roll type diffusion dialysis membrane module and a preparation method thereof. BACKGROUND

[0002] The existing roll type diffusion dialysis membrane module generally adopts a pair of center tubes spliced together as an axis, so that the flow direction is one-sided double-in and double-out or one-sided double-in and double-out on both sides. Although there is no problem in using a single membrane module to recover and treat industrial waste acid, the disadvantage of insufficient reverse flow of diffusion liquid and dialysis liquid is particularly obvious when multiple membrane modules are collectively treated at a higher degree of integration, especially when multiple membrane modules are treated side by side, and the diffusion liquid and dialysis liquid inlets and outlets are required to be on one side. Undoubtedly, the existing technology will increase the difficulty of setting. In addition, during the preparation of the existing roll type diffusion dialysis membrane module, the winding mode causes the innermost membranes to be annular channels, which affects the liquid flow speed to some extent, and the outer membranes are less affected, resulting in uneven internal and external pressure and uneven flow speed, thereby reducing the mass transfer efficiency of the entire device. SUMMARY

[0003] The purpose of the present application is to solve the problems of difficult setting of liquid inlets and outlets and low mass transfer efficiency when multiple membrane modules are collectively treated at a higher degree of integration, and a roll type diffusion dialysis membrane module and a preparation method thereof are provided.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0005] A roll type diffusion dialysis membrane module and a preparation method thereof, comprising a roll type diffusion dialysis membrane module, comprising a cylinder, a pair of U-shaped tubes arranged side by side and fixed in the cylinder with the opening facing upward, and an end cover arranged at the opening end of the cylinder; the upper ends of the straight pipe portions of the U-shaped tubes are connected with the inlet and outlet pipes of the diffusion liquid and the dialysis liquid, and the inlet and outlet pipes of the diffusion liquid and the dialysis liquid pass through the end cover upward; the distance between the adjacent two straight pipe portions is equal, and an ion exchange membrane is arranged between a pair of diagonal straight pipe portions; the distance between the two ends of the ion exchange membrane is close to the length of the adjacent straight pipe portion, and a flow channel separation net is arranged on both sides of the ion exchange membrane; the ion exchange membrane and the flow channel separation net are spirally wound into a cylindrical shape with the above-mentioned pair of diagonal straight pipe portions as the axis, and the ends of the ion exchange membrane and the flow channel separation net wound are fixed on the other pair of straight pipe portions; the space supported by the flow channel separation net constitutes a fluid channel and is located on both sides of the ion exchange membrane, one side of which constitutes a diffusion liquid flow channel and is connected with a pair of diffusion liquid inlet and outlet connectors, and the other side constitutes a dialysis liquid flow channel and is connected with a pair of dialysis liquid inlet and outlet pipes.

[0006] Further description of the above technical scheme is as follows:

[0007] The straight pipe part outside is uniformly provided with a plurality of through holes, and the axis of the through hole is parallel to the line connecting the obliquely opposite pair of straight pipe parts.

[0008] As a further description of the above technical solution:

[0009] The inner side of the barrel is fixed with four U-shaped grooves, and the barrel is provided with a support frame for fixing the U-shaped tube.

[0010] As a further description of the above technical solution:

[0011] The end cover is provided with four round holes, and a pipe clamp is arranged in the round hole.

[0012] As a further description of the above technical solution:

[0013] The preparation method of the spiral diffusion dialysis membrane assembly comprises:

[0014] S1, fixing: inserting the straight pipe part of the U-shaped tube into the annular ring on the support frame;

[0015] S2, winding and bonding: blocking the bent pipe part of the U-shaped tube with adhesive, so that the two straight pipe parts are not communicated with each other; placing an ion exchange membrane between the obliquely opposite pair of straight pipe parts, placing a flow channel screen on both sides of the ion exchange membrane, the length of the ion exchange membrane at both ends is equal to the length of the adjacent straight pipe part, and the ion exchange membrane, the flow channel screen and the two straight pipe parts are bonded and fixed; the ion exchange membrane and the flow channel screen are tightly wound around the two straight pipe parts in the same direction, and the edges of the ion exchange membrane and the flow channel screen are coated with adhesive for bonding and sealing;

[0016] S3, packaging: the ion exchange membrane and the flow channel screen are tightly wound into a cylindrical shape, and the ends of the ion exchange membrane and the flow channel screen are fixed on the other pair of straight pipe parts; the four straight pipe parts and the ion exchange membrane and the flow channel screen thereon are uniformly and tightly sealed and fixed by a plastic film, forming a membrane core, the membrane core is placed in the barrel, the outer straight rod segment of the support frame is placed in the U-shaped groove, and the membrane core is installed in the barrel; the membrane core is fixed in the barrel by casting adhesive in the barrel, the upper end of the liquid inlet and outlet pipe is placed in the pipe clamp, and the end cover is placed on the upper end of the barrel to seal it, thereby forming a spiral diffusion dialysis membrane assembly with four inlet and outlet pipes.

[0017] S4, forming a channel: the straight pipe part outside is uniformly provided with a plurality of through holes; the "straight pipe part-flow channel screen-another straight pipe part on the same U-shaped tube" channels on both sides of the ion exchange membrane respectively form spiral diffusion liquid flow channels and dialysate flow channels.

[0018] As a further description of the above technical solutions:

[0019] The ion exchange membrane and the flow channel spacer net are bonded and solidified by the adhesive.

[0020] As a further description of the above technical solutions:

[0021] The ion exchange membrane is bonded after being treated by plasma.

[0022] As a further description of the above technical solutions:

[0023] The membrane core is installed in the cylindrical shell, and the two ends of the membrane core are fixed between the shell by casting adhesive.

[0024] As described above, due to the adoption of the above technical solutions, the beneficial effects of the present application are:

[0025] (1) The spiral-wound diffusion dialysis membrane module of the present application can realize the setting of the diffusion liquid and dialysis liquid inlets and outlets on the same side when multiple membrane modules are collectively processed, and can realize the full reverse flow of the diffusion liquid and dialysis liquid.

[0026] (2) The liquid flow channel in the present application is composed of an annular channel and a flat plate channel, and the pressure and flow rate can be adjusted at the flat plate channel after the liquid flow passes through the annular channel each time, the internal and external pressures are uniform, the turbulence degree is uniform, the mass transfer efficiency is high, the contact area is wide, and it is easy to integrate with other reaction or separation equipment during preparation. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0028] Figure 2 is a schematic diagram of the internal structure of the present application;

[0029] Figure 3 is a schematic diagram of the winding structure of the ion exchange membrane and the flow channel spacer net;

[0030] Figure 4 is Figure 3 is an enlarged view of A in the middle;

[0031] Figure 5 is a schematic diagram of the liquid flow direction.

[0032] Legend: 1, cylinder; 2, end cover; 3, straight pipe part; 4, ion exchange membrane; 5, flow channel spacer net; 6, through hole; 7, U-shaped groove; 8, support frame; 9, pipe clamp. DETAILED DESCRIPTION

[0033] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the protection scope of the present application.

[0034] Please refer to Figures 1-5 The present application provides a technical solution of a spiral diffusion dialysis membrane module:

[0035] Four U-shaped grooves 7 are evenly distributed and fixed on the inner side of the cylinder 1. A support frame 8 is arranged in the cylinder 1 for fixing the U-shaped tube. The straight tube part 3 of the U-shaped tube is inserted into the circular ring on the support frame 8 to form a pair of U-shaped tubes arranged side by side with the opening facing upward.

[0036] The bent tube part of the U-shaped tube is sealed with an adhesive so that the two straight tube parts 3 are not communicated with each other. An ion exchange membrane 4 is placed between one pair of diagonally opposite straight tube parts 3. A flow channel screen 5 is placed on both sides of the ion exchange membrane 4. The two ends of the ion exchange membrane 4 are equal in length to the adjacent straight tube parts 3, and the ion exchange membrane 4, the flow channel screen 5 and the two straight tube parts 3 are fixed by adhesion. Since the surface energy of the ion exchange membrane 4 is very low, the ion exchange membrane 4 is treated by plasma before adhesion. The ion exchange membrane 4 and the flow channel screen 5 are tightly wrapped around the two straight tube parts 3 in the same direction, and the edges of the ion exchange membrane 4 and the flow channel screen 5 are sealed by coating adhesive thereon while being wrapped. The ion exchange membrane 4 and the flow channel screen 5 are tightly wrapped in a spiral shape to form a cylinder, and the ends of the ion exchange membrane 4 and the flow channel screen 5 are fixed on the other pair of straight tube parts 3. The four straight tube parts 3 and the ion exchange membrane 4 and the flow channel screen 5 thereon are uniformly and tightly sealed and fixed by a plastic film to form a membrane core. The membrane core is placed in the cylinder 1, the outer straight rod segments of the support frame 8 are placed in the U-shaped grooves 7, and the membrane core is loaded into the cylinder 1. The membrane core is fixed in the cylinder 1 by casting adhesive in the cylinder 1. The upper ends of the liquid inlet and outlet pipes are placed in the pipe clamp 9, and the end cover 2 is placed on the upper end of the cylinder 1 to seal it, thereby forming a spiral diffusion dialysis membrane module with four inlet and outlet pipes.

[0037] A plurality of through holes 6 are evenly arranged on the outer side of the straight tube part 3. The channels of the straight tube part 3-flow channel screen 5-another straight tube part 3 on the same U-shaped tube on both sides of the ion exchange membrane 4 respectively form spiral diffusion liquid channels and dialysate flow channels. The membrane core is loaded into the cylindrical shell, and the two ends of the membrane core are fixed by casting adhesive between the membrane core and the shell. Figure 5The illustrated one of the straight pipe sections 3 wrapped with the ion exchange membrane 4 and the flow channel spacer 5 is used to input the diffusion liquid, which flows in a spiral from inside to outside at the side of the ion exchange membrane 4 and flows out from the other straight pipe section in the same U-shaped pipe, thus forming a spiral diffusion liquid flow channel. The other straight pipe section 3 not wrapped with the ion exchange membrane 4 and the flow channel spacer 5 is used to input the dialysate, which flows in a spiral from outside to inside at the other side of the ion exchange membrane 4 and flows out from the other straight pipe section in the same U-shaped pipe, thus forming a dialysate flow channel. The flow modes of the two kinds of fluids are spiral countercurrent contact.

[0038] A preparation method of a spiral diffusion dialysis membrane assembly comprises the following steps:

[0039] S1, fixing: inserting the straight pipe section 3 of the U-shaped pipe into the ring on the support frame 8;

[0040] S2, winding and bonding: blocking the bent pipe section of the U-shaped pipe with adhesive to make the two straight pipe sections 3 not communicated with each other; after the ion exchange membrane 4 is treated by plasma, it is bonded again; placing an ion exchange membrane 4 between one pair of diagonal straight pipe sections 3, placing a flow channel spacer 5 on both sides of the ion exchange membrane 4, and bonding the ion exchange membrane 4 and the flow channel spacer 5 with the two straight pipe sections 3; bonding and curing the ion exchange membrane 4 and the flow channel spacer 5 with adhesive; winding the ion exchange membrane 4 and the flow channel spacer 5 together in the same direction around the two straight pipe sections 3, and bonding and sealing the edges of the ion exchange membrane 4 and the flow channel spacer 5 with adhesive while winding;

[0041] S3, packaging: winding the ion exchange membrane 4 and the flow channel spacer 5 together in a spiral to form a cylinder, and fixing the ends of the wound ion exchange membrane 4 and flow channel spacer 5 on the other pair of straight pipe sections 3; uniformly and tightly sealing and fixing the four straight pipe sections 3, the ion exchange membrane 4 and the flow channel spacer 5 thereon with a plastic film to form a membrane core, placing the membrane core in the cylinder 1, placing the outer straight rod section of the support frame 8 in the U-shaped groove 7, and placing the membrane core into the cylinder 1; fixing the membrane core in the cylinder 1 by casting adhesive in the cylinder 1, placing the end cover 2 on the upper end of the cylinder 1 to seal, and forming a spiral winding diffusion dialysis membrane assembly with four inlet and outlet pipes;

[0042] S4, forming channels: uniformly providing a plurality of through holes 6 on the outer side of the straight pipe section 3; the channels of "straight pipe section 3-flow channel spacer 5-the other straight pipe section 3 in the same U-shaped pipe" on both sides of the ion exchange membrane 4 form a spiral diffusion liquid flow channel and a dialysate flow channel, respectively.

[0043] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and those skilled in the art, according to the technical solution and inventive concept of the present application, can make equivalent replacements or changes within the technical range disclosed by the present application, which should be encompassed in the protection scope of the present application.

Claims

1. A roll-type diffusion dialysis membrane module, characterized by, The application relates to a dialysis device, which comprises a cylinder (1), a pair of U-shaped tubes fixed in the cylinder (1), an end cover (2) arranged at the opening end of the cylinder (1), and a plurality of straight pipe sections (3) of the U-shaped tubes.

2. A roll-type diffusion dialysis membrane module according to claim 1, wherein The cylinder (1) is internally fixed with four U-shaped grooves (7) which are evenly distributed along the circumference, and the cylinder (1) is internally provided with a supporting frame (8) for fixing the U-shaped tube, wherein the supporting frame (8) comprises a straight rod section and a circular ring section, and the outer straight rod section of the supporting frame (8) is arranged in the U-shaped groove (7).

3. A roll-type diffusion dialysis membrane module according to claim 1, wherein The end cover (2) is provided with four circular holes, and a pipe clamp (9) is arranged in each of the circular holes.

4. A spiral wound diffusion dialysis membrane module according to any one of claims 1 to 3, characterised in that, The preparation method comprises the following steps: S1, fixing: inserting the straight pipe sections (3) of the U-shaped tube into the circular ring of the supporting frame (8); S2, winding and bonding: blocking the bent pipe sections of the U-shaped tube with adhesive, so that the straight pipe sections (3) on the two sides are not communicated with each other; placing an ion exchange membrane (4) between one pair of diagonal straight pipe sections (3), placing a flow channel screen (5) on the two sides of the ion exchange membrane (4), and bonding and fixing the ion exchange membrane (4), the flow channel screen (5) and the two straight pipe sections (3); winding the ion exchange membrane (4) and the flow channel screen (5) around the two straight pipe sections (3) in the same direction, and coating adhesive on the edges of the ion exchange membrane (4) and the flow channel screen (5) during winding. S3, packaging: the ion exchange membrane (4) and the flow channel screen (5) are tightly wound into a cylinder in a spiral shape, the ends of the ion exchange membrane (4) and the flow channel screen (5) wound are fixed on the other pair of straight pipe sections (3) respectively; the four straight pipe sections (3) and the ion exchange membrane (4) and the flow channel screen (5) thereon are uniformly and tightly sealed and fixed by a plastic film, a membrane core is formed, the membrane core is placed in the cylinder (1), the outer straight rod section of the support frame (8) is placed in the U-shaped groove (7), the membrane core is installed in the cylinder (1); the membrane core is fixed in the cylinder (1) by casting adhesive in the cylinder (1), the upper end of the liquid inlet and outlet pipe is placed in the pipe clamp (9), the end cover (2) is placed on the upper end of the cylinder (1) to seal, and a spiral wound diffusion dialysis membrane assembly with four inlet and outlet connecting pipes is formed; S4, forming a channel: a plurality of through holes (6) are uniformly arranged on the outer side of the straight pipe section (3); the channels of the straight pipe section (3)-the flow channel screen (5)-the other straight pipe section (3) on the same U-shaped pipe located on both sides of the ion exchange membrane (4) respectively constitute spiral diffusion liquid flow channels and dialysate flow channels.

5. A roll-type diffusion dialysis membrane module according to claim 4, wherein The ion exchange membrane (4) and the flow channel screen (5) are bonded and solidified by an adhesive in the middle.

6. A roll-type diffusion dialysis membrane module according to claim 4, wherein The ion exchange membrane (4) is processed by plasma and then bonded.

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