Gas separation device

Abstract

The embodiment of the present application provides a hydrogen isotope gas separation device, comprising: a filling column, the filling column is coiled to form a single-layer planar spiral structure; two heat-conducting parts, arranged on both sides of the filling column, each of the heat-conducting parts is formed with a planar spiral groove on the surface of one side facing the filling column, and the planar spiral grooves of the two heat-conducting parts together form a spiral channel for accommodating the filling column; two refrigeration parts, each of the refrigeration parts is thermally connected to the heat-conducting part on the outside of one of the heat-conducting parts; and two heating parts, each of the heating parts is thermally connected to the refrigeration part on the outside of one of the refrigeration parts. Due to the above structure, the gas separation device of the embodiment of the present application can increase the contact area between the filling column and the heat-conducting part, and can evenly heat and cool the filling column through the heat-conducting part.

Description

Technical Field

[0001] The present invention relates to the technical field of gas separation, and in particular to a gas separation device. Background Art

[0002] The chromatographic separation column (i.e., the filling column) is filled with an adsorbent. When a multi-component mixed gas enters the filling column, the isotope effect of the adsorbent (diatomaceous earth loaded with palladium) is significantly affected by temperature. The isotope effect is obvious at low temperatures, and the adsorption effect on light components is better than that on heavy components. The heavy components will gradually move toward the outlet of the filling column due to the difference in concentration gradient. At high temperatures, the isotope effect is weak, and the components are desorbed together. However, after multiple temperature cycles, a certain net separation effect is obtained. At present, the prior art device for gas separation using a filling column at least has the problem of uneven temperature when the filling column is heated and cooled, thereby affecting the separation efficiency of the filling column. Summary of the invention

[0003] In response to the above technical problems, an embodiment of the present application provides a hydrogen isotope gas separation device, which can uniformly heat and uniformly cool a filling column.

[0004] The gas separation device of the embodiment of the present application comprises:

[0005] A packing column, wherein the packing column is coiled to form a single-layer planar spiral structure;

[0006] Two heat-conducting parts are arranged on both sides of the filling column, and a plane spiral groove is formed on a surface of each heat-conducting part facing the filling column, and the plane spiral grooves of the two heat-conducting parts jointly form a spiral channel for accommodating the filling column;

[0007] Two refrigeration parts, each of which is thermally connected to the heat conducting part at the outer side of one of the heat conducting parts; and

[0008] Two heating parts, each of which is thermally connected to the refrigeration part at the outer side of one refrigeration part.

[0009] Since the gas separation device according to the embodiment of the present application has the above structure, the contact area between the filling column and the heat conducting part can be increased, and the filling column can be evenly heated and cooled through the heat conducting part. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present invention.

[0011] Figure 1 is a schematic structural diagram of a gas separation device according to an embodiment of the present invention;

[0012] Figure 2 yes Figure 1 A partial cross-sectional view of the gas separation device shown;

[0013] Figure 3 is an exploded schematic diagram of a gas separation device according to another embodiment of the present invention, in which a heating unit is omitted;

[0014] Figure 4 is a schematic structural diagram of a refrigeration unit according to an embodiment of the present invention;

[0015] Figure 5 is a schematic diagram of the connection between a coolant distribution pipeline, a coolant inlet pipeline and a refrigeration pipe according to an embodiment of the present invention;

[0016] Figure 6 is a schematic diagram of the connection between a coolant merging pipeline, a coolant outlet pipeline and a refrigeration pipe according to an embodiment of the present invention;

[0017] Figure 7 is a schematic structural diagram of a heating unit according to an embodiment of the present invention; and

[0018] Figure 8 Schematic diagram of the structure of a packed column according to an embodiment of the present invention.

[0019] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiment is one embodiment of the present invention, not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in this application should have the common meanings understood by persons having ordinary skills in the field to which the invention belongs.

[0022] In the description of the embodiments of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] See also Figures 1 to 3 The gas separation device of the embodiment of the present invention comprises: a filling column 20, two heat conducting parts 30, two cooling parts 40, and two heating parts 50. The filling column 20 is coiled to form a single-layer planar spiral structure.

[0024] Two heat conducting parts 30 are arranged on both sides of the filling column 20 . A planar spiral groove is formed on a surface of each heat conducting part 30 facing the filling column 20 . The planar spiral grooves of the two heat conducting parts 30 together form a spiral channel for accommodating the filling column 20 .

[0025] Each cooling part 40 is thermally connected to the heat conducting part 30 at the outer side of a heat conducting part 30. Each heating part 50 is thermally connected to the cooling part 40 at the outer side of a cooling part 40.

[0026] Due to the above structure, the gas separation device of the embodiment of the present application can increase the contact area between the filling column 20 and the heat conducting part 30, and can evenly heat the filling column 20 through the heat conducting part 30. Specifically, when cooling, the heat of the refrigeration part 40 can be quickly transferred to the heat conducting part 30, and then evenly and quickly transferred to the filling column 20 by the heat conducting part 30, so that the filling column 20 is evenly cooled and has a faster cooling rate. When heating, the heat of the heating part 50 is sequentially transferred to the heat conducting part 30 and the filling column 20 through the refrigeration part 40, so that the filling column 20 is evenly heated and has a faster heating rate.

[0027] In addition, the embodiment of the present application arranges the heating part 50 and the cooling part 40 outside the heat conducting part 30, which is beneficial to reduce the occupied space of the gas separation device and facilitates installation and maintenance.

[0028] The heat conducting part 30 can be made of a heat conducting material. For example, the heat conducting part can be made of copper. The two heat conducting parts 30 can be detachably connected. The filling column 20 is arranged inside the spiral channel formed by the two heat conducting parts 30 to be in heat conducting contact with the two heat conducting parts 30.

[0029] In some embodiments, the gas separation device further includes: two pressing plates 60. Each pressing plate 60 is used to press the heating part 50 and the cooling part 40 on the same side with the heat conducting part 30 so that the heating part 50, the cooling part 40, and the heat conducting part 30 are thermally connected. The pressing plate 60 can be detachably connected to the heat conducting part 30, so that the heating part 50, the cooling part 40, the heat conducting part 30 and the filling column 20 are installed as a whole through the pressing plate 60.

[0030] In some embodiments, the pressing plate 60 is a hollow structure. The pressing plate 60 with a hollow structure has a small heat capacity, so that most of the heat of the heating part 50 can be transferred to the cooling part 40, the heat conducting part 30 and the filling column 20.

[0031] In some embodiments, the gas separation device further includes: two temperature sensors, each used to detect the temperature of the heat conducting part 30 , and the temperature of the filling column 20 is detected by detecting the temperature of the heat conducting part 30 .

[0032] See also Figure 4In some embodiments, each refrigeration unit 40 is formed by spirally winding a plurality of refrigeration tubes 41 to form a single-layer planar spiral structure. For a refrigeration unit 40 of the same area, compared with a refrigeration unit 40 formed by spirally winding a single refrigeration tube 41, a refrigeration unit 40 formed by spirally winding a plurality of refrigeration tubes 41 can shorten the length of each refrigeration tube 41, thereby shortening the flow path of the coolant in the refrigeration tube 41, so that the temperature difference between the inlet and outlet ends of the refrigeration tube 41 is small, and the refrigeration unit 40 as a whole has a higher refrigeration efficiency, thereby accelerating the cooling efficiency of the filling column 20. In addition, the single-layer planar spiral structure is also beneficial to increase the contact area between the refrigeration unit 40 and the heat-conducting unit 30 and the heating unit 50, thereby facilitating the increase of the heat and cold transfer rate.

[0033] The refrigeration unit 40 may be formed by spirally winding more than 5 refrigeration pipes 41. In some embodiments, the refrigeration unit 40 may be formed by spirally winding more than 10 refrigeration pipes 41.

[0034] See also Figure 5 and Figure 6 In some embodiments, the gas separation device further includes: a coolant inlet pipeline 43 , a coolant outlet pipeline 44 , a coolant distribution pipeline 45 and a coolant merging pipeline 46 .

[0035] The coolant inlet pipe 43 is used to introduce the coolant into the refrigeration unit 40 . The coolant outlet pipe 44 is used to lead the coolant in the refrigeration unit 40 out.

[0036] The coolant distribution line 45 is in communication with the coolant inlet line 43 and is also in communication with the refrigeration tube 41 of each refrigeration unit 40 , so as to distribute the coolant from the coolant inlet line 43 to each refrigeration tube 41 .

[0037] The coolant merging pipeline 46 is in communication with the coolant inlet pipeline 43 and is also in communication with the refrigeration pipe 41 of each refrigeration unit 40 , so as to deliver the coolant from each refrigeration pipe 41 to the coolant outlet pipeline 44 .

[0038] The coolant distribution pipeline 45 can be connected to the port of each refrigeration tube 41 located on the outside of the single-layer planar spiral structure; the coolant merging pipeline 46 can be located and connected to the port on the inside of the single-layer planar spiral structure, so that the overall temperature of the single-layer planar spiral structure tends to be uniform.

[0039] In some embodiments, the gas separation device further comprises: a heat-insulating shell, wherein the filling column 20, two heat-conducting parts 30, two cooling parts 40, and two heating parts 50 are all arranged inside the heat-insulating shell. The heat-insulating shell can form a heat-insulating cavity 111. The heat-insulating cavity 111 can be a vacuum interlayer, or filled with heat-insulating materials.

[0040] In some embodiments, the heat-insulating housing includes: a shell 11 , a cover 12 and a fixing plate 13 .

[0041] The housing 11 is provided with an opening. The cover 12 is detachably provided to cover the opening of the housing 11. The fixing plate 13 is provided to cover the opening on the inner side of the cover 12, and the coolant distribution pipeline 45 and the coolant merging pipeline 46 are provided on the fixing plate 13. The coolant inlet pipeline 43, the coolant outlet pipeline 44 and the two ports 21 of the filling column 20 extend from the cover 12 to the outside respectively.

[0042] The coolant distribution pipeline 45 and the coolant merging pipeline 46 are arranged on the inner side of the fixed plate 13, and the coolant inlet pipeline 43, the coolant outlet pipeline 44 and the two ports 21 of the filling column 20 are sequentially extended to the outside through the fixed plate 13 and the cover 12. In the embodiment of the present application, since the coolant distribution pipeline 45 and the coolant merging pipeline 46 are arranged on the inner side of the fixed plate 13, it is beneficial to reduce the diffusion of cold to the outside of the heat preservation shell.

[0043] The refrigeration tube 41 is made of a heat-conducting metal material. The coolant is liquid nitrogen. Using liquid nitrogen as the cooling medium of the system can quickly cool down the filling column 20.

[0044] The gas separation device further includes: a liquid nitrogen cooling circulation unit, which is used to pressurize the nitrogen flowing out of the coolant outlet pipe 44 to liquefy it, and then provide it to the coolant inlet pipe 43. The embodiment of the present application can achieve efficient cooling and re-pressurize the vaporized liquid nitrogen to achieve circulation and reuse by setting up the liquid nitrogen cooling circulation unit.

[0045] In some embodiments, a power supply interface 121 is provided on the cover body 12 , and the connection terminal 52 of the heating unit 50 extends through the fixing plate 13 to be electrically connected to the power supply interface, thereby facilitating quick disassembly and assembly of the heating unit 50 .

[0046] In some embodiments, see Figure 7 The heating portion 50 is formed by winding the heating wire 51 to form a planar spiral structure, thereby increasing the contact area between the heating portion 50 and the refrigeration portion 40.

[0047] The heating wire 51 can be formed into a planar spiral structure by a double-wire winding method, wherein two terminal ends 52 of the heating wire 51 are located at the outermost side of the planar spiral structure.

[0048] See also Figure 8 In some embodiments, the filling column 20 is formed into a planar spiral structure by double-winding, wherein the inlet and outlet of the filling column 20 are located at the outermost side of the planar spiral structure. This arrangement can ensure that the filling column 20 remains in the same plane as a whole after winding, so as to facilitate thermal connection with the heat conducting parts 30 on both sides.

[0049] The filling column 20 includes a tube body and an adsorbent filled in the tube body. In some embodiments, the adsorbent may be palladium-loaded diatomaceous earth, so that the filling column 20 can separate hydrogen isotopes. The gas separation device of the embodiment of the present application can meet the requirements of rapid temperature change and adsorption concentration, and realize efficient separation of mixed raw gas.

[0050] The tube body of the packing column 20 can be made of a heat-conducting metal material. For example, the tube body of the packing column 20 is a copper tube. The palladium-loaded diatomite is easy to pulverize after a large number of temperature changes and may enter the process pipeline. Therefore, filters 201 can be respectively provided at the two ports 21 of the packing column 20 to prevent the pulverized small solid particles from entering the process pipeline from the two ports 21 of the packing column 20.

[0051] The test shows that when the gas separation device of the embodiment of the present application is used to separate the HD mixed gas, more than 99.5% of D can be obtained; when the gas separation device of the embodiment of the present application is used to separate the HT mixed gas, more than 99.5% of T can be obtained. When the gas separation device of the embodiment of the present application is used to separate the HDT ternary mixed gas, more than 99.5% of T can be obtained. It can be seen that the gas separation device of the embodiment of the present application can separate any two or three components of hydrogen isotope mixed gas.

[0052] Regarding the embodiments of the present invention, it should also be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0053] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A hydrogen isotope gas separation device, characterized in that: include: A packing column, wherein the packing column is coiled to form a single-layer planar spiral structure; Two heat-conducting parts are arranged on both sides of the filling column, and a plane spiral groove is formed on a surface of each heat-conducting part facing the filling column, and the plane spiral grooves of the two heat-conducting parts jointly form a spiral channel for accommodating the filling column; Two refrigeration parts, each of which is thermally connected to the heat conducting part at the outer side of one of the heat conducting parts; as well as Two heating parts, each of which is thermally connected to the refrigeration part at the outer side of one of the refrigeration parts; The hydrogen isotope gas separation device further includes: two pressing plates, each of which is used to press the heating part and the refrigeration part on the same side with the heat conduction part so that the heating part, the refrigeration part and the heat conduction part are thermally connected; The pressing plate is a hollow structure; Each of the refrigeration parts is formed by spirally winding a plurality of refrigeration pipes to form a single-layer planar spiral structure; The hydrogen isotope gas separation device further comprises: A coolant inlet pipeline, used for introducing coolant into the refrigeration unit; A coolant outlet pipeline, used for leading out the coolant in the refrigeration unit; a coolant distribution pipeline, which is in communication with the coolant inlet pipeline and is also in communication with each refrigeration pipe of the refrigeration unit, and is used for distributing the coolant from the coolant inlet pipeline to each refrigeration pipe; and A coolant merging pipeline, which is in communication with the coolant inlet pipeline and is also in communication with the refrigeration pipe of each refrigeration unit, and is used to deliver the coolant from each refrigeration pipe to the coolant outlet pipeline; The heating part is formed by winding a heating wire to form a planar spiral structure.

2. The hydrogen isotope gas separation device according to claim 1, characterized in that: Also includes: Two temperature sensors are used to detect the temperature of the heat conducting part respectively.

3. The hydrogen isotope gas separation device according to claim 1, characterized in that: Also includes: The heat-insulating shell, the filling column, the two heat-conducting parts, the two refrigeration parts, and the two heating parts are all arranged inside the heat-insulating shell.

4. The hydrogen isotope gas separation device according to claim 3, characterized in that: The thermal insulation shell comprises: A housing having an opening; a cover body, detachably covering the opening of the housing; and A fixing plate, which is covered on the opening at the inner side of the cover body, and the coolant distribution pipeline and the coolant merging pipeline are arranged on the fixing plate; The coolant inlet pipeline, the coolant outlet pipeline and the two ports of the filling column extend from the cover to the outside respectively.

5. The hydrogen isotope gas separation device according to claim 4, characterized in that: The coolant distribution pipeline and the coolant merging pipeline are arranged on the inner side of the fixing plate, and the coolant inlet pipeline, the coolant outlet pipeline and the two ports of the filling column extend to the outside via the fixing plate and the cover in sequence.

6. The hydrogen isotope gas separation device according to claim 4, characterized in that: The cover body is provided with a power supply interface, and the connection terminal of the heating part extends through the fixing plate to be electrically connected to the power supply interface.

7. The hydrogen isotope gas separation device according to claim 1, characterized in that: The packing column adopts a double-wire winding method to form the planar spiral structure, wherein the inlet and outlet of the packing column are located at the outermost side of the planar spiral structure.

8. The hydrogen isotope gas separation device according to claim 1, characterized in that: The packed column comprises a tube body and an adsorbent filled in the tube body. Wherein, the adsorbent is palladium-loaded diatomaceous earth.

9. The hydrogen isotope gas separation device according to claim 8, characterized in that: Filters are respectively arranged at two ports of the filling column.

10. The hydrogen isotope gas separation device according to claim 8, characterized in that: The tube body is made of heat-conducting metal material.

11. The hydrogen isotope gas separation device according to claim 1, characterized in that: The heating wire is formed into the planar spiral structure by a double-wire winding method, wherein two connection ends of the heating wire are located at the outermost sides of the planar spiral structure.

12. The hydrogen isotope gas separation device according to claim 1, characterized in that: The refrigeration tube is made of heat-conducting metal material.

13. The hydrogen isotope gas separation device according to claim 12, characterized in that: The coolant is liquid nitrogen.

14. The hydrogen isotope gas separation device according to claim 13, characterized in that: Also includes: The liquid nitrogen cooling circulation part is used to pressurize the nitrogen flowing out of the coolant outlet pipeline to liquefy it, and then provide it to the coolant inlet pipeline.

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