Tubular carbon film device

Abstract

The invention provides a tubular carbon film device which comprises a tube shell, a plurality of carbon film units are arranged in the tube shell, and each carbon film unit comprises a core rod with a spiral groove formed in the outer wall; the plurality of carbon films are circumferentially and uniformly distributed on the outer side of the core rod; the carbon film is parallel to the core rod and makes contact with the outer side face of the core rod. And the fastening ring has elasticity and is sleeved and fixed with the carbon film. According to the carbon film assembly, the core rod is arranged to support the carbon film, and the carbon film is stably supported and fixed under the action of the fastening ring, so that the problem that the carbon film material is brittle and easy to break is effectively solved, the reliability of the carbon film assembly in the use process is remarkably improved, and the fluid separation effect and efficiency are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid separation devices, and specifically to a tubular carbon membrane device. Background Art

[0002] In many industrial fields and scientific research applications for fluid separation, there are relatively high requirements for the heat resistance and chemical resistance of separation membranes. Due to its excellent heat resistance and outstanding chemical resistance, hollow fiber carbon membranes have become a relatively ideal choice for separation membranes in many such application scenarios.

[0003] In the actual application process, the carbon membrane is usually housed in a specific container to form a carbon membrane module, thereby realizing effective separation operation of the fluid. However, the carbon membrane itself is brittle, which makes the carbon membrane extremely prone to breakage during the use of the carbon membrane module. Once the carbon membrane breaks, it will not only directly affect the fluid separation effect and reduce the separation efficiency, but may also cause fluid leakage, triggering a series of safety problems and posing a serious threat to the production process and equipment safety.

[0004] To solve the problem of easy breakage of the carbon membrane, Patent No. JP7501367B2 discloses a carbon membrane module for fluid separation. This solution attempts to protect the carbon membrane by helically winding at least one wrapping wire on the outer side of the carbon membrane, reducing the possibility of carbon membrane breakage. However, in actual application, in order to smoothly wind the wrapping wire on the outer surface of the carbon membrane, the diameter of the wrapping wire itself is much smaller than that of the carbon membrane, resulting in a low bending stiffness of the wrapping wire itself. It is difficult to assist the carbon membrane to resist bending deformation, and the wrapping wire cannot be wound too tightly. It can only be relatively loose because once wound too tightly, it may even cause the carbon membrane to be cut by the wrapping wire. And the loose wrapping wire is even more difficult to assist the carbon membrane to resist bending deformation. In the case of being loose during the initial winding, it is more likely to further loosen subsequently, greatly reducing the protective effect on the carbon membrane or even completely losing its function. Summary of the Invention

[0005] To solve the technical problem that in the carbon membrane separation module in the background art, a wrapping wire is helically wound on the outer side of the carbon membrane. Since the diameter of the wrapping wire itself is much smaller than that of the carbon membrane, its bending stiffness is low and it is difficult to assist the carbon membrane to resist bending deformation. During long-term use, due to the influence of factors such as impact, vibration, and temperature change generated by fluid flow, the wrapping wire is prone to loosening, the present invention discloses a tubular carbon membrane device.

[0006] The present invention provides a tubular carbon membrane device, including a tube shell and a plurality of carbon membrane units;

[0007] The carbon film unit includes a core rod and a plurality of hollow carbon films arranged at intervals along the axis direction of the core rod;

[0008] The carbon film unit is arranged inside the shell, one end of which is fixed to the shell through the first potting structure, and the other end is fixed to the shell through the second potting structure;

[0009] An inner cavity is formed between the inner wall of the shell, the first potting structure, the second potting structure and the outer surface of the carbon film unit;

[0010] One end of the shell is covered with a first end cap, a first liquid cavity communicating with the inside of the carbon film is formed between the first end cap and the first potting structure, and a first pipe orifice communicating with the first liquid cavity is arranged on the first end cap;

[0011] A second pipe orifice communicating with the inner cavity is arranged on the shell;

[0012] A spiral groove is arranged on the outer wall of the core rod; the spiral direction of the spiral groove extends along the axial direction of the core rod;

[0013] At least one fastening ring is sleeved outside each carbon film unit, and the fastening ring is configured to constrain all the carbon films of the carbon film unit where it is located to contact the outer peripheral surface of the core rod.

[0014] Further, the core rod is formed by flat plate twisting.

[0015] Further, the fastening ring is an elastic fastening ring, and the fastening ring is used to constrain all the carbon films of the carbon film unit where it is located to contact the outer peripheral surface of the core rod through its own elasticity.

[0016] Further, the material of the fastening ring is rubber.

[0017] Further, a plurality of partition blocks are arranged at intervals along the circumferential direction on the inner peripheral wall of the fastening ring; the partition blocks are located between adjacent two carbon films, so as to form a gap between the adjacent two carbon films to constitute a flow channel, and the flow channel communicates with the spiral groove.

[0018] Further, the cross section of the partition block is in an arc shape protruding towards the core rod.

[0019] Further, one fastening ring is arranged at both ends and the middle part of the carbon film unit.

[0020] Further, both ends of the carbon film extend axially beyond the core rod.

[0021] Further, the other end of the shell is covered with a second end cap; a second liquid cavity communicating with the inside of the carbon film is formed between the second end cap and the second potting structure; a first pipe orifice communicating with the second liquid cavity is also arranged on the second end cap.

[0022] The beneficial effects of the present invention are as follows: The present invention ingeniously arranges a plurality of carbon films around the axis of the core rod to form a carbon film unit. In this way, a core rod with an outer diameter approximately equal to or larger than that of the carbon film can be selected, enabling the use of a core rod with a large bending stiffness as the central support, greatly enhancing the overall bending stiffness of the carbon film unit, and enabling the carbon films in all directions to be effectively assisted by the core rod to resist bending deformation. Under the action of the fastening ring, the carbon film is stably supported and fixed, thus effectively overcoming the problem that the carbon film material is brittle and easy to break, significantly improving the reliability of the carbon film assembly during use, and ensuring the effect and efficiency of fluid separation.

[0023] More crucially, the design of the spiral groove on the core rod enables the liquid flowing out from the side of the carbon film close to the core rod to be discharged outward through the spiral groove, so as to inhibit the loss of the effective filtration area caused by the arrangement of multiple carbon films around the core rod, that is, to prevent the area enclosed between multiple carbon films from forming a stagnant area where liquid cannot flow. In addition, the design of the spiral groove on the core rod also reduces the contact area between the core rod and the carbon film, further inhibiting the loss of the effective filtration area caused by the arrangement of multiple carbon films around the core rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the drawings and embodiments.

[0025] Figure 1 is the front sectional view of the present invention;

[0026] Figure 2 is the structural schematic diagram of the carbon film unit;

[0027] Figure 3 is the structural schematic diagram of the carbon film unit with one carbon film hidden;

[0028] Figure 4 is the exploded view of the carbon film unit;

[0029] Figure 5 is the front sectional view of the carbon film unit;

[0030] Figure 6 is Figure 5 the enlarged view of part A in

[0031] Figure 7 is Figure 5 the enlarged view of part B in

[0032] Figure 8 is Figure 7 the enlarged view of part C in

[0033] In the figure: 1. Core rod; 2. Spiral groove; 3. Carbon film; 4. Fastening ring; 5. Spacer block; 6. Housing; 7. Fixed sleeve; 8. First pipe orifice; 9. Second pipe orifice; 10. Glue; 11. First potting structure; 12. Flow channel; 13. Inner cavity; 14. First liquid cavity; 15. Second liquid cavity; 16. Second potting structure; 17. First end cover; 18. Second end cover. Detailed implementation mode

[0034] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present invention in a schematic way, so they only show the components related to the present invention.

[0035] As Figure 1 shown, the present invention discloses a tubular carbon film device, which includes a housing 6, and a plurality of carbon film units are installed in the housing 6. One end of the carbon film unit is fixedly connected to the housing 6 through a first potting structure 16, and the other end of the carbon film unit is fixedly connected to the housing 6 through a second potting structure 17.

[0036] The first potting structure 16 and the second potting structure 17 have the same structure, and both include a structure in which the carbon film 3 at the end of the carbon film unit is fixed under the action of the glue 10. This fixed structure is inserted into the fixed sleeve 7 and is also connected and fixed through the glue 10. In this way, an inner cavity 13 is formed between the inner wall of the housing 6, the first potting structure 16, the second potting structure 17 and the carbon film unit.

[0037] Both ends of the housing 6 are respectively connected with a first end cover 17 and a second end cover 18. The first end cover 17 and the first potting structure 16 form a first liquid cavity 14; the second end cover 18 and the second potting structure 17 form a second liquid cavity 15. An outward axially extending first pipe orifice 8 communicating with the first liquid cavity 14 is provided at the outer end of the first end cover 17, and an outward axially extending first pipe orifice 8 communicating with the second liquid cavity 15 is provided at the outer end of the second end cover 18. A radially extending second pipe orifice 9 communicating with the inner cavity 13 is provided at the middle position of the housing 6. The first liquid cavity 14 and the second liquid cavity 15 can only communicate with the inner cavity 13 through the carbon film 3.

[0038] When the carbon film unit is fixed to the housing 6 by potting with the first potting structure 16 and the second potting structure 17, the ends of the carbon film 3 will be blocked by the glue. After the carbon film 3 is potted, the ends of the carbon film 3 are sheared, and the blocking parts at the ends of the carbon film 3 are cut off, so that the inside of the carbon film 3 is exposed again and communicated with the first liquid chamber 14 and the second liquid chamber 15. A fixing sleeve 7 can also be provided at the first potting structure 16 and the second potting structure 17. A plurality of mounting holes are arranged in the fixing sleeve 7. One end of each carbon film unit is correspondingly inserted into a mounting hole, and each carbon film unit protrudes from the fixing sleeve 7 towards the end away from the inner cavity 3. In this way, after the carbon film 3 is potted, the part of the carbon film 3 protruding from the fixing sleeve 7 is cut off, and the inside of the carbon film 3 can be exposed again and communicated with the first liquid chamber 14. All the fixing sleeves 7 are fixedly connected to the inner wall of the housing 6 under the action of the glue 10.

[0039] As Figures 2 - 6 shown, the carbon film unit includes a core rod 1, a carbon film 3 and a fastening ring 4.

[0040] The core rod 1 is formed by twisting a rectangular and rigid metal plate into a spiral shape, so that a spiral groove 2 is formed on its outer side wall. The spiral groove 2 extends along the axial direction of the core rod 1. With such a setting, compared with the core rod 1 formed by casting, the process is simpler and the cost is lower.

[0041] The carbon film 3 can be a hollow fiber carbon film. The carbon films 3 are evenly distributed around the outer side of the core rod 1 in a circumferential manner; the carbon films 3 are parallel to the core rod 1 and contact the outer side surface of the core rod 1. In this embodiment, the number of the carbon films 3 is six, and there is a spacing between adjacent carbon films 3, so that the holes on the side walls of the carbon films 3 will not be blocked by adjacent carbon films 3.

[0042] Moreover, by setting the outer side wall of the core rod 1 to be spiral, the contact area between the core rod 1 and the carbon film 3 is reduced, so that the number of holes on the side wall of the carbon film 3 blocked by the core rod 1 is greatly reduced, and the separation performance of the carbon film 3 will not be affected, and the carbon film 3 assembly can operate effectively and stably. And as Figure 7 shown, a flow channel 12 is formed by the gap between the spiral groove 2 and the adjacent carbon film 3, so that the liquid in the spiral groove 2 can stably flow into the carbon film 3 or flow out from the second pipe orifice 9.

[0043] To improve the connection strength of the carbon film 3, as Figure 7 and Figure 8 shown, the connection part between the carbon film 3 and the core rod 1 is also fixedly connected by the glue 10.

[0044] The fastening rings 4 are provided as three evenly distributed ones, sleeved on the outer side of the carbon film 3, and the carbon film 3 is fixedly connected to the core rod 1 through its elasticity. The fastening rings 4 are respectively arranged at both ends and the middle position of the carbon film unit.

[0045] In this embodiment, a plurality of carbon films 3 are cleverly arranged around the axis of the core rod 1 to form a carbon film unit. In this way, a core rod 1 with an outer diameter approximately equal to or larger than that of the carbon film 3 can be selected, so that a core rod 1 with a large bending stiffness can be used as the central support, greatly enhancing the overall bending stiffness of the carbon film unit, enabling the carbon films 3 in all directions to be effectively assisted by the core rod 1 to resist bending deformation; and under the action of the fastening ring, the carbon films 3 are stably supported and fixed, thus effectively overcoming the problem that the carbon film 3 material is brittle and easy to break, significantly improving the reliability of the carbon film assembly during use, and ensuring the effect and efficiency of fluid separation.

[0046] More critically, the design of the spiral groove on the core rod 1 enables the liquid flowing out from the side of the carbon film 3 close to the core rod to be discharged outward through the spiral groove 2, so as to inhibit the loss of the effective filtration area caused by the arrangement of multiple carbon films 3 around the core rod 1, that is, to prevent the area enclosed between multiple carbon films 3 from forming a stagnant area where the liquid cannot flow. In addition, the design of the spiral groove 2 on the core rod 1 also reduces the contact area between the core rod 1 and the carbon film 3, further inhibiting the loss of the effective filtration area caused by the arrangement of multiple carbon films 3 around the core rod 1.

[0047] In addition, the fastening ring 4 not only plays a role in fixing the carbon film 3, but also its elastic characteristics enable it to better adapt to the impacts, vibrations, temperature changes and other factors generated by fluid flow, avoiding the problem of the protection effect failing due to loosening, greatly enhancing the stability and durability of the protection measures, and ensuring that the carbon film 3 assembly can still maintain good performance during long-term use.

[0048] The inner side of the fastening ring 4 is provided with raised and circumferentially uniformly distributed partition blocks 5. The partition blocks 5 are integrally formed with the fastening ring 4, and the number thereof is the same as that of the carbon films 3, and the partition blocks 5 are arranged between the carbon films 3. The partition blocks 5 can effectively separate adjacent carbon films 3, avoiding deformation or damage caused by mutual extrusion between the carbon films 3 during installation, use or under external force impact. Moreover, the partition blocks 5 can also keep the flow channel 12 formed between adjacent carbon films 3 stable.

[0049] In this embodiment, the partition blocks 5 are set to be spherical, so that the partition blocks 5 do not generate edges or corners, avoiding the contact between the edges or corners and the carbon film 3. Due to the too small contact area and too large pressure, the carbon film 3 is pressed and broken. Moreover, the curved surface contact characteristics can provide flexible buffering during fluid flow or vibration, absorb part of the impact energy, and reduce the fatigue damage of the carbon film 3 caused by vibration or pressure fluctuation.

[0050] A triangular cavity is formed between the fastening ring and the adjacent carbon film 3. The cavity covers the spacer block 5, so that the spacer block 5 either does not contact the carbon film 3 or can only contact one carbon film 3. With such a setting, the carbon film 3 has a certain radial movement space; when the carbon film 3 assembly is subjected to vibration or fluid impact, it can play a buffering role to prevent the carbon film 3 from cracking when subjected to vibration or fluid impact.

[0051] As Figure 3 shown, both ends of the carbon film 3 extend beyond the core rod 1 along its axial direction to prevent the carbon film 3 from touching the core rod 1 when the end of the carbon film unit is integrally sheared after the carbon film 3 is potted; however, the core rod 1 can extend into the first potting structure 16 and the second potting structure 17, as long as it is ensured that the spiral groove 2 is not directly communicated with the first liquid cavity 14.

[0052] The working principle of the internal pressure ultrafiltration of the present invention is as follows: The liquid to be separated flows into the housing 6 from one of the first nozzles 8, or simultaneously flows into the housing 6 from both first nozzles 8, and then enters the carbon film 3 from the end of the carbon film 3. Part of the separated liquid directly flows out of the carbon film 3 through the holes on the side wall of the carbon film 3 and enters the area between the carbon film unit and the housing 6; the remaining liquid flows out of the carbon film 3 through the holes on the side wall of the carbon film 3, first flows into the flow channel 12, and then flows into the area between the carbon film unit and the housing 6; finally, the separated liquid flows out from the second nozzle 9, and the impurities remain in the carbon film 3.

[0053] The working principle of the external pressure ultrafiltration of the present invention is as follows: The liquid to be separated flows into the housing 6 from the second nozzle 9; part of the liquid directly flows into the carbon film 3 through the holes on the side wall of the carbon film 3, and the remaining liquid first enters the flow channel 12 and then flows into the carbon film 3 through the holes on the side wall of the carbon film 3. The separated liquid flows out from both ends of the carbon film 3, or is collected by flowing out from one of the first nozzles 8, or flows outwards from both first nozzles 8 for collection, and the impurities remain on the outer side wall of the carbon film 3.

[0054] Taking the ideal embodiments of the present invention described above as an inspiration, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A tubular carbon membrane device, characterized in that: It comprises a tube shell (6) and a plurality of carbon film units; The carbon film unit comprises a core rod (1) and a plurality of hollow carbon films (3) arranged at intervals in the axial direction of the core rod (1); The carbon membrane unit is arranged in the tube shell (6), one end of which is fixed to the tube shell (6) via a first potting structure (11), and the other end of which is fixed to the tube shell (6) via a second potting structure (16); An inner cavity (13) is formed between the inner wall of the tube shell (6), the first potting structure (11), the second potting structure (16) and the outer avoidance surface of the carbon membrane unit; One end of the tube shell (6) is sealed with a first end cap (17), a first liquid cavity (14) communicating with the interior of the carbon membrane (3) is formed between the first end cap (17) and the first potting structure (11), and a first pipe opening (8) communicating with the first liquid cavity (14) is provided on the first end cap (17); The tube shell (6) is provided with a second tube opening (9) communicating with the inner cavity (13); The outer wall of the core rod (1) is provided with a spiral groove (2); the spiral direction of the spiral groove (2) extends along the axial direction of the core rod (1); Each carbon film unit is sleeved with at least one fastening ring (4), and the fastening ring (4) is configured to constrain all carbon films (3) in the carbon film unit to contact the outer peripheral surface of the core rod (1).

2. A tubular carbon membrane device according to claim 1, characterized in that: The core rod (1) is formed by twisting a flat plate.

3. A tubular carbon membrane device according to claim 2, characterized in that: The fastening ring (4) is an elastic fastening ring (4), and the fastening ring (4) is used to constrain all carbon films (3) in the carbon film unit to contact the outer peripheral surface of the core rod (1) through its own elasticity.

4. A tubular carbon membrane device according to claim 3, characterized in that: The material of the fastening ring (4) is rubber.

5. A tubular carbon membrane device according to claim 3, characterized in that: The inner peripheral wall of the fastening ring (4) is provided with a plurality of spacers (5) arranged at intervals along the circumference thereof; The spacer (5) is located between two adjacent carbon films (3), so that a gap is formed between the two adjacent carbon films (3) to form a flow channel (12), and the flow channel (12) is connected to the spiral groove (2).

6. A tubular carbon membrane device according to claim 5, characterized in that: The cross section of the spacer (5) is in the shape of an arc convex toward the core rod (1).

7. A tubular carbon membrane device according to claim 6, characterized in that: Both ends and the middle portion of the carbon film unit are provided with a fastening ring (4).

8. The tubular carbon membrane device according to claim 1, characterized in that: Both ends of the carbon film (3) extend beyond the core rod (1) along its axial direction.

9. The tubular carbon membrane device according to claim 1, characterized in that: The other end of the tube shell (6) is sealed with a second end cover (18); A second liquid chamber (15) communicating with the interior of the carbon membrane (3) is formed between the second end cap (18) and the second encapsulation structure (16); The second end cover (18) is also provided with a first pipe opening (8) which is in communication with the second liquid chamber (15).

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