Rotatable molecular sieve adsorber with reinforced regeneration structure

Abstract

The invention discloses a rotatable molecular sieve adsorber with a reinforced regeneration structure, and relates to the technical field of adsorbers, the rotatable molecular sieve adsorber comprises a shell, a horizontal round tray is mounted in the shell, and a first cylinder, a second cylinder and a third cylinder are sequentially mounted on the round tray from inside to outside; the bottom of the round tray is fixedly provided with a rotating shaft located in the middle and supporting legs which surround the rotating shaft and are attached to the shell. A first vent hole is formed in the top of the shell corresponding to the first cylinder, and a second vent hole is formed in the bottom of the shell. According to the rotatable molecular sieve adsorber with the reinforced regeneration structure, raw material gas can be in uniform contact with molecular sieves of all parts, and the overall adsorption efficiency of the molecular sieves is improved. In the regeneration process, the regeneration gas can be in uniform contact with the molecular sieve of each part, so that the adsorption performance of the regenerated molecular sieve is improved, and the overall operation efficiency and the product quality of the adsorber are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of adsorbers, in particular to a rotatable molecular sieve adsorber with an enhanced regeneration structure. Background Art

[0002] Molecular sieve adsorbers are widely used in air separation and purification, primarily for removing impurities such as carbon dioxide, water, and hydrocarbons from the air. The molecular sieve adsorber's operating process is divided into two stages: adsorption and regeneration. During normal operation, airflow enters the adsorber at the inlet, passes through the adsorbent bed, and exits at the outlet. During regeneration, regeneration gas enters the adsorber at the regeneration inlet, passes through the adsorbent bed, and exits at the regeneration outlet.

[0003] Common molecular sieve adsorbers are mostly fixed-bed structures. For example, Chinese utility model patent publication number CN214680908U discloses a horizontal molecular sieve adsorber comprising a sealed adsorber housing, a molecular sieve mesh disposed within the housing, molecular sieve particles disposed within the molecular sieve mesh, a feed inlet and a discharge inlet disposed at the top and bottom of the housing, and feed and discharge inlet covers disposed at the top and bottom of the housing, respectively; a first diverter plate and a second diverter plate disposed on either side of the molecular sieve mesh, respectively, and a first filter screen and a second filter screen disposed on either side of the first and second diverter plates, respectively.

[0004] During the adsorption process of this type of molecular sieve adsorber, when the feed gas passes through the molecular sieve layer, due to uneven gas distribution, it is easy for some molecular sieves to be saturated quickly while others are saturated slowly, making it difficult for the molecular sieve to fully achieve its overall adsorption efficiency. In addition, during the regeneration stage, traditional regeneration methods such as heated nitrogen purge often fully regenerate some molecular sieves while insufficiently regenerating others. This results in limited recovery of the molecular sieve's adsorption performance after regeneration, affecting the overall operating efficiency of the adsorber and product quality. Summary of the Invention

[0005] The object of the present invention is to provide a rotatable molecular sieve adsorber with an enhanced regeneration structure to address the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a rotatable molecular sieve adsorber with an enhanced regeneration structure includes a shell, a horizontal circular tray is installed in the shell, and a first cylinder, a second cylinder and a third cylinder are installed on the circular tray in sequence from the inside to the outside. A rotating shaft located in the middle position and a support leg surrounding the rotating shaft and fitting with the shell are fixedly installed at the bottom of the circular tray; a first air vent is opened at a position on the top of the shell corresponding to the first cylinder, and a second air vent is opened at the bottom of the shell.

[0007] As a preferred technical solution of the present invention, blades are evenly installed on the circumferential surface of the circular tray.

[0008] As a preferred technical solution of the present invention, a steel ball is movably installed at the bottom of the support leg, and an annular groove cooperating with the steel ball is provided at the bottom of the shell.

[0009] As a preferred technical solution of the present invention, the top surfaces of the first cylinder, the second cylinder and the third cylinder are all in contact with the top of the shell.

[0010] As a preferred technical solution of the present invention, two vertical screws are rotatably installed in the shell, and an annular plate is commonly installed on the two screws; the inner and outer side surfaces of the annular plate are respectively in contact with the third cylinder and the shell.

[0011] As a preferred technical solution of the present invention, the fixed sleeve at the bottom end of the screw is provided with a gear, and a gear ring meshing with the gear is fixedly mounted on the support foot via a support arm.

[0012] As a preferred technical solution of the present invention, the annular plate is evenly provided with a number of square grooves passing through the annular plate along its circumference, two silicone sheets are fixedly installed on the upper surface of the annular plate at positions corresponding to the square grooves, and a baffle is fixedly installed on the upper surface of the annular plate for sealing the side surfaces of the silicone sheets.

[0013] As a preferred technical solution of the present invention, a rigid tube located below the annular plate is fixedly installed on the inner wall of the shell at a position corresponding to the square groove through a bracket.

[0014] As a preferred technical solution of the present invention, a first feed port is provided at a position between the first cylinder and the second cylinder on the top of the shell, and a second feed port is provided at a position between the second cylinder and the third cylinder.

[0015] As a preferred technical solution of the present invention, a first discharge port is provided on the round tray at a position corresponding to the position between the first cylinder and the second cylinder, and a second discharge port is provided at a position corresponding to the position between the second cylinder and the third cylinder. Both the first discharge port and the second discharge port correspond to the position of the second vent hole.

[0016] In the above technical solution, the present invention provides a rotatable molecular sieve adsorber with an enhanced regeneration structure. The first cylinder, the second cylinder, and the third cylinder in the shell can rotate synchronously with the circular tray. The molecular sieve between the first cylinder and the second cylinder, and the aluminum gel between the second cylinder and the third cylinder can also rotate. In this way, during the adsorption process, the raw gas can contact the molecular sieve in each part more evenly, thereby improving the overall adsorption efficiency of the molecular sieve. During the regeneration process, the regenerated gas can contact the molecular sieve in each part more evenly, thereby improving the adsorption performance of the molecular sieve after regeneration, and ensuring the overall operating efficiency and product quality of the adsorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A first perspective view of a rotatable molecular sieve adsorber with an enhanced regeneration structure;

[0019] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0020] Figure 3 This is a schematic diagram of the first state of the silicone sheet in the embodiment;

[0021] Figure 4 This is a schematic diagram of the second state of the silicone sheet in the embodiment;

[0022] Figure 5 A second perspective view of a rotatable molecular sieve adsorber with an enhanced regeneration structure;

[0023] Figure 6 for Figure 5 A magnified schematic diagram of point B in the middle;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the first sealing plate and the second sealing plate.

[0025] Description of reference numerals:

[0026] 1. Shell; 101. First vent hole; 102. Second vent hole; 2. Round tray; 3. First cylinder; 4. Second cylinder; 5. Third cylinder; 6. Rotating shaft; 7. Support foot; 8. Blade; 9. Steel ball; 10. Screw; 11. Ring plate; 1101. Square groove; 12. Gear; 13. Ring gear; 14. Silicone sheet; 15. Baffle; 16. Rigid tube; 17. First sealing plate; 1701. First discharge port; 18. Second sealing plate; 1801. Second discharge port; 19. Rubber sheet. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] like Figure 1 and Figure 6As shown, this embodiment provides a rotatable molecular sieve adsorber with an enhanced regeneration structure, including a cylindrical shell 1, a horizontal circular tray 2 is installed in the shell 1, the circular tray 2 is coaxial with the shell 1, and the circular tray 2 is sequentially installed with a first cylinder 3, a second cylinder 4 and a third cylinder 5 coaxial therewith from the inside to the outside. The top surfaces of the first cylinder 3, the second cylinder 4 and the third cylinder 5 are all in contact with the top of the shell 1. A rotating shaft 6 coaxial therewith and a support leg 7 surrounding the rotating shaft 6 are fixedly installed at the bottom of the circular tray 2, a steel ball 9 is movably installed at the bottom of the support leg 7, and an annular groove cooperating with the steel ball 9 is provided on the upper surface of the bottom of the shell 1. A reduction motor for driving the rotating shaft 6 to rotate is installed at the bottom of the shell 1. A first air vent 101 flush with the edge of the first cylinder 3 is provided at the position of the top of the shell 1 corresponding to the first cylinder 3, and a second air vent 102 is provided at the bottom of the shell 1.

[0030] It should be noted that, in order to facilitate the display of the interior of the housing 1, Figure 1 and Figure 6 Part of the structure of the shell 1 is omitted. The first cylinder 3, the second cylinder 4 and the third cylinder 5 are hollow. Figure 1 For the sake of convenience in display, the middle parts of the first barrel 3, the second barrel 4 and the third barrel 5 are removed. The first barrel 3, the second barrel 4 and the third barrel 5 are all made of heat-resistant plastic or metal plate with a thickness of 1-2 mm.

[0031] Specifically, the space between the first barrel 3 and the second barrel 4 is filled with molecular sieve, and the space between the second barrel 4 and the third barrel 5 is filled with aluminum gel. During the adsorption process, the raw gas is transported into the shell 1 through the second vent 102 and passes through the third barrel 5, the third barrel 5, and the first barrel 3 in sequence. The raw gas successively contacts the aluminum gel and the molecular sieve. The gas adsorbed by the aluminum gel and the molecular sieve passes through the first barrel 3 and the first vent 101 before being discharged from the top of the shell 1. During the above process, the reduction motor drives the rotating shaft 6, the round tray 2, the first barrel 3, the second barrel 4, and the third barrel 5 to rotate synchronously, so that the raw gas can more evenly contact the molecular sieve in each part, thereby improving the overall adsorption efficiency of the molecular sieve. During the regeneration process, the regeneration gas enters the shell 1 through the first vent 101 and passes through the first barrel 3, the second barrel 4, and the third barrel 5 in sequence. The regeneration gas successively contacts the molecular sieve and the aluminum gel, and is then discharged from the bottom of the shell 1 through the second vent 102.

[0032] like Figure 5 As shown, blades 8 are evenly installed on the circumferential surface of the circular tray 2. When the circular tray 2 rotates, the blades 8 are driven to rotate synchronously. The blades 8 disperse the raw gas, promote the uniform distribution of the raw gas in the horizontal direction, and further improve the uniformity of molecular sieve adsorption.

[0033] During actual operation, during the adsorption process, the raw gas at the bottom tends to pass through the aluminum gel and molecular sieve more easily, while the raw gas at the top is less likely to do so. During the regeneration process, the regeneration gas at the top tends to pass through the molecular sieve and aluminum gel more easily, while the regeneration gas at the bottom is less likely to do so. To address this issue, this embodiment also incorporates the following design.

[0034] like Figure 1 and Figure 6 As shown, two vertical lead screws 10 are rotatably installed in the housing 1, and an annular plate 11 is installed on the two lead screws 10; the inner and outer circumferential surfaces of the annular plate 11 are respectively fitted with the third cylinder 5 and the housing 1, thereby dividing the housing 1 into two upper and lower parts; a gear 12 is fixedly sleeved on the bottom end of the lead screw 10, and a ring gear 13 meshing with the gear 12 is fixedly installed on the support leg 7 through a support arm. When the circular tray 2 drives the support leg 7 to rotate around the rotating shaft 6, the ring gear 13 also rotates synchronously and drives the gear 12 meshing with it to rotate. The gear 12 drives the lead screw 10 to rotate, thereby driving the annular plate 11 to move in the vertical direction. As long as the rotation direction of the rotating shaft 6 is controlled by the reduction motor, the annular plate 11 can be raised and lowered. Specifically, when the rotating shaft 6 rotates forward, the annular plate 11 rises, and when the rotating shaft 6 rotates reversely, the annular plate 11 falls.

[0035] like Figure 1-Figure 5 As shown, the annular plate 11 is evenly provided with a number of square grooves 1101 penetrating the annular plate 11 along its circumference. Two silicone sheets 14 are fixedly installed on the upper surface of the annular plate 11 at positions corresponding to the square grooves 1101. A baffle 15 for sealing the side of the silicone sheet 14 is fixedly installed on the upper surface of the annular plate 11. A rigid tube 16 located below the annular plate 11 is fixedly installed on the inner wall of the shell 1 at positions corresponding to the square grooves 1101 through a bracket. It should be noted that the silicone material involved in this embodiment is heat-resistant silicone with a heat-resistant temperature of not less than 200°C. The two silicone sheets 14 are Figure 2 and Figure 3 In the state shown, the tops extend upward and fit together, and the sides of the two silicone sheets 14 fit together with the baffle 15 , thereby sealing the other groove 1101 .

[0036] Specifically, during the adsorption process, in the initial state, the annular plate 11 is located at the lowest point of its vertical travel, and the rigid tube 16 and the two silicone sheets 14 are in the state as follows: Figure 4 As shown, the raw gas enters the shell 1 from the second vent hole 102, fills the area below the annular plate 11, and then enters the area above the annular plate 11 through the rigid tube 16, filling the area above the annular plate 11. During this process, the round tray 2 remains stationary. Subsequently, the reduction motor drives the rotating shaft 6 and the round tray 2 to rotate in the forward direction, the annular plate 11 begins to rise, and the silicone sheet 14 separates from the rigid tube 16 and enters Figure 3 The state shown is the state in which the opposite groove 1101 is closed. As the annular plate 11 continues to rise, it continuously squeezes the raw gas above it, promoting the raw gas above it to pass through the aluminum gel and molecular sieve. After the annular plate 11 reaches the top of its vertical stroke, the reduction motor drives the rotating shaft 6 and the circular tray 2 to rotate in the opposite direction, and the annular plate 11 begins to descend. The air pressure in the area above the annular plate 11 gradually decreases, and the raw gas below it will exert a force on the two silicone sheets 14 that fit each other, so that a gap is generated between the two silicone sheets 14, and the raw gas is able to enter the area above the annular plate 11 until the annular plate 11 returns to the bottom of its vertical stroke, and then continues to cycle the above steps. In this way, during the adsorption process, the annular plate 11 can promote the raw gas above to pass through the aluminum gel and molecular sieve.

[0037] During the regeneration process, in the initial state, the annular plate 11 is located Figure 1 In the position shown, the regeneration gas enters the interior of the shell 1 from the first vent hole 101, fills the first cylinder 3, and then passes through the molecular sieve and aluminum gel. During this process, the circular tray 2 remains stationary. Subsequently, the reduction motor drives the rotating shaft 6 and the circular tray 2 to rotate in the forward direction, the annular plate 11 begins to rise, and the air pressure in the area above the annular plate 11 increases. It is not easy for the regeneration gas to enter the high-pressure area, and it can only pass through the molecular sieve and aluminum gel downward from the area below the annular plate 11. After the annular plate 11 reaches the top of its vertical stroke, the reduction motor drives the rotating shaft 6 and the circular tray 2 to rotate in the opposite direction, the annular plate 11 begins to descend, and the air pressure in the area above the annular plate 11 gradually decreases, allowing the regeneration gas to pass through the molecular sieve and aluminum gel from the area above the annular plate 11. The annular plate 11 descends to Figure 1 After the annular plate 11 is positioned as shown, the above steps are circulated. In this way, during the regeneration process, the annular plate 11 can promote the regeneration gas below to pass through the molecular sieve and the aluminum gel.

[0038] The top of the housing 1 has a first feed port defined between the first and second barrels 3 and 4, and a second feed port defined between the second and third barrels 4 and 5. The circular tray 2 has a first discharge port defined between the first and second barrels 3 and 4, and a second discharge port defined between the second and third barrels 4 and 5. Both the first and second discharge ports correspond to the positions of the second vent 102. Sealing plugs are threadedly installed at the first, second, first, and second discharge ports. After using for a period of time, the molecular sieve and aluminum gel need to be replaced. The operator removes the pipe connected to the second vent 102, and then controls the round tray 2 to rotate by the reduction motor until the first discharge port and the second discharge port are both aligned with the second vent 102. Then, the sealing plug is opened to allow the aluminum gel and molecular sieve to fall freely. When no more aluminum gel and molecular sieve fall, the sealing plug is installed, and the round tray 2 is controlled to rotate by the reduction motor until the next set of first discharge port and second discharge port are both aligned with the second vent 102. The sealing plug is then opened to discharge the material. During the loading process, the operator directly opens the sealing plug and discharges the material from the first feed port and the second feed port to the corresponding position.

[0039] Example 2

[0040] As the circular tray 2 rotates during operation, the molecular sieves also move. After prolonged operation, powder is generated, reducing the volume of the molecular sieves. The powder fills the spaces between adjacent molecular sieves, and the same applies to the aluminum gel. This results in the aluminum gel and molecular sieves in the top area not being able to fill their corresponding areas, and the raw gas may escape from the vacant areas. To address this issue, this embodiment has implemented the following design.

[0041] like Figure 7 As shown, based on the previous embodiment, in this embodiment, a first sealing plate 17 is installed between the first cylinder 3 and the second cylinder 4 in a vertically sliding manner, and a second sealing plate 18 is installed between the second cylinder 4 and the third cylinder 5 in a vertically sliding manner. In the initial state, the first sealing plate 17 and the second sealing plate 18 are both in contact with the top of the shell 1, and the molecular sieve under the first sealing plate 17 supports the first sealing plate 17, and the aluminum glue under the second sealing plate 18 supports the second sealing plate 18. When the molecular sieve is worn, the first sealing plate 17 will drop, and when the aluminum glue is worn, the second sealing plate 18 will drop. In this way, the first sealing plate 17 and the second sealing plate 18 have a barrier effect on the raw gas, and the raw gas cannot escape.

[0042] like Figure 7As shown, a first discharge port 1701 is provided on the first sealing plate 17 at a position corresponding to the first feed port, and a second discharge port 1801 is provided on the second sealing plate 18 at a position corresponding to the second feed port. A rubber sheet 19 is installed at the position corresponding to the first discharge port 1701 on the first sealing plate 17 and at the position corresponding to the second discharge port 1801 on the second sealing plate 18. A cross-shaped opening is cut in the middle of the rubber sheet 19. When no external force is applied, the rubber sheet 19 is horizontal, i.e., the cross-shaped opening is closed. Both the first sealing plate 17 and the second sealing plate 18 are made of PPS material. A magnet ring is fixedly mounted on the outer ring of the first sealing plate 17, and an iron ring is mounted on the inner ring of the second sealing plate 18. Thus, the first sealing plate 17 and the second sealing plate 18 are able to rise and fall together through the mutual attraction between the magnet ring and the iron ring. The outer ring of the second sealing plate 18 is fixedly mounted with a magnet ring, and the inner ring of the annular plate 11 is fixedly mounted with an iron ring. In this way, through the mutual attraction between the magnet ring and the iron ring, the annular plate 11 can drive the first sealing plate 17 and the second sealing plate 18 to rise and fall together.

[0043] Specifically, during the loading process, the annular plate 11 rises, breaking through its highest point in vertical travel during operation and continuing to rise. Through magnetic force, it drives the first and second sealing plates 17, 18 to rise synchronously until both the first and second sealing plates 17, 18 are in contact with the top of the housing 1. This means that there is no gap between the first feed port and the first discharge port 1701, and no gap between the second feed port and the second discharge port 1801. This allows the operator to easily pass through the rubber sheet 19 and into the interior of the housing 1 during the loading process. During this process, the cross-shaped opening in the middle of the rubber sheet 19 opens.

[0044] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A rotatable molecular sieve adsorber with an enhanced regeneration structure, comprising a housing (1), a horizontal circular tray (2) mounted in the housing (1), a first cylinder (3), a second cylinder (4) and a third cylinder (5) mounted on the circular tray (2) in order from the inside out, characterized in that: A rotating shaft (6) located in the middle and supporting legs (7) surrounding the rotating shaft (6) and fitting with the shell (1) are fixedly mounted on the bottom of the round tray (2); a first vent hole (101) is provided at a position on the top of the shell (1) corresponding to the first cylinder (3), and a second vent hole (102) is provided at the bottom of the shell (1).

2. The rotatable molecular sieve adsorber with an enhanced regeneration structure according to claim 1, characterized in that: Blades (8) are evenly mounted on the circumferential surface of the circular tray (2).

3. The rotatable molecular sieve adsorber with an enhanced regeneration structure according to claim 1, characterized in that: A steel ball (9) is movably mounted on the bottom of the support foot (7), and an annular groove cooperating with the steel ball (9) is provided on the bottom of the housing (1).

4. The rotatable molecular sieve adsorber with an enhanced regeneration structure according to claim 1, characterized in that: The top surfaces of the first cylinder (3), the second cylinder (4) and the third cylinder (5) are all in contact with the top of the shell (1).

5. The rotatable molecular sieve adsorber with an enhanced regeneration structure according to claim 4, characterized in that: Two vertical screws (10) are rotatably mounted in the housing (1), and an annular plate (11) is mounted on the two screws (10); the inner and outer side surfaces of the annular plate (11) are respectively fitted with the third cylinder (5) and the housing (1).

6. The rotatable molecular sieve adsorber with an enhanced regeneration structure according to claim 5, characterized in that: The bottom end of the lead screw (10) is fixedly sleeved with a gear (12), and a gear ring (13) meshing with the gear (12) is fixedly mounted on the support leg (7) via a support arm.

7. The rotatable molecular sieve adsorber with an enhanced regeneration structure according to claim 5, characterized in that: The annular plate (11) is provided with a plurality of square grooves (1101) uniformly formed along its circumference and penetrating the annular plate (11). Two silicone sheets (14) are fixedly mounted on the upper surface of the annular plate (11) at positions corresponding to the square grooves (1101). A baffle (15) for sealing the side surfaces of the silicone sheets (14) is fixedly mounted on the upper surface of the annular plate (11).

8. The rotatable molecular sieve adsorber with an enhanced regeneration structure according to claim 7, characterized in that: A rigid tube (16) located below the annular plate (11) is fixedly mounted on the inner wall of the housing (1) at a position corresponding to the square groove (1101) via a bracket.

9. The rotatable molecular sieve adsorber with an enhanced regeneration structure according to claim 1, characterized in that: A first feed inlet is provided at a position on the top of the shell (1) corresponding to between the first cylinder (3) and the second cylinder (4), and a second feed inlet is provided at a position corresponding to between the second cylinder (4) and the third cylinder (5).

10. The rotatable molecular sieve adsorber with an enhanced regeneration structure according to claim 9, characterized in that: A first discharge port is provided on the circular tray (2) at a position corresponding to between the first cylinder (3) and the second cylinder (4), and a second discharge port is provided at a position corresponding to between the second cylinder (4) and the third cylinder (5). Both the first discharge port and the second discharge port correspond to the positions of the second vent hole (102).

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