A low-pressure-loss adsorption tower

Abstract

The present invention relates to a low-pressure-loss adsorption tower, which is provided with an outer cylinder and an inner cylinder rotatably arranged therein. A core tube is arranged inside the inner cylinder, and a partition plate divides the interior of the inner cylinder into a plurality of placement chambers with a central angle of β for placing desiccant. Adjacent preset numbers of placement chambers form a regeneration area with a central angle of α, and the remaining placement chambers are drying areas. An air flow tube is placed inside the core tube, and a first pipe partition plate and a second pipe partition plate arranged along the side line direction of the central angle α divide the interior of the air flow tube into a first pipe cavity and a second pipe cavity with a central angle of α. A first sealing strip and a second sealing strip arranged along the side line direction of the central angle α divide the second air flow chamber into a regeneration air flow output chamber and a drying air flow output chamber with a central angle of α. A third sealing strip and a fourth sealing strip arranged along the side line direction of the central angle α divide the first air flow chamber into a regeneration air flow input chamber and a to-be-dried air flow input chamber with a central angle of α. With this setting, the gas in the adsorption tower of the present application flows radially, which is beneficial to reducing the pressure drop.

Description

Technical Field

[0001] The present invention relates to the technical field of gas drying, and particularly to a low-pressure-drop adsorption tower. Background Art

[0002] Adsorption dryers are widely used in the drying of compressed gases. To reduce the dew point of the gas, the desiccant needs to be regenerated in a timely manner. As Figure 1 shown in the schematic diagram of a zero-air-consumption single-tower adsorption dryer of the prior art, its adsorption tower 1' is divided into a drying zone and a regeneration zone. By driving the adsorption tower 1' to rotate through a driving device, the desiccant in the drying zone is moved to the regeneration zone for regeneration; the regenerated desiccant is then sent back to the drying zone for drying the humid gas. The regeneration of the desiccant in the regeneration zone is usually carried out by introducing a part of the gas that has been dried in the drying zone into the regeneration zone, and these dried drying gases regenerate the desiccant in the regeneration zone.

[0003] To optimize the process of recovering the regenerated gas and achieve zero air consumption, these regenerated gases need to be introduced back into the drying zone for drying treatment because the regenerated gas contains a large amount of moisture. In the adsorption tower 1' of the prior art, the axial gas flow mode is adopted, and the gas will encounter a large resistance when passing through the desiccant, resulting in a significant pressure drop. At the same time, the humid gas provided by the air compressor 2' usually has a relatively high pressure, while the gas in the regeneration zone has a relatively low pressure due to the pressure drop. This pressure difference causes the gas in the regeneration zone to be unable to effectively mix with the humid gas of the air compressor 2' and enter the adsorption tower 1', thus affecting the gas flow and circulation, the regeneration of the desiccant, and reducing the overall performance of the dryer.

[0004] To reduce the resistance caused by the desiccant and reduce the gas pressure drop, desiccants with a smaller resistance coefficient are usually selected, such as honeycomb desiccants, but this will increase the use cost of the dryer. In addition, an ejector 3' can be set in the system to improve the mixing process of the regenerated gas and the humid gas. The working principle of the ejector 3' is similar to that of a Venturi tube. The humid gas is ejected at a high speed through the ejector 3', generating a negative pressure, thereby sucking in the regenerated gas and mixing the two and sending them into the adsorption tower 1'. Although the ejector 3' can effectively solve the problem of integrating the regenerated gas in most cases, when the gas pressure of the air compressor 2' is low, the negative pressure generated by the ejector 3' is still not sufficient to completely suck in the regenerated gas, resulting in poor system circulation, affecting the regeneration of the desiccant and the overall performance of the dryer. At the same time, it still requires desiccants with a smaller resistance coefficient and still does not solve the problem of relatively high use cost.

[0005] Therefore, how to effectively solve the large pressure drop caused by the axial gas flow mode of the adsorption tower 1' has become an urgent problem to be solved at present. Summary of the Invention

[0006] To this end, the present invention provides a low-pressure-drop adsorption tower, which mainly solves the technical problem of large pressure drop caused by the axial gas flow mode of the adsorption tower of the zero-air-consumption single-tower adsorption dryer in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A low-pressure loss adsorption tower, comprising an outer cylinder; also comprising a first medium input pipe and a second medium input pipe; an inner cylinder is rotatably arranged in the outer cylinder; a core pipe with a closed bottom is coaxially arranged in the inner cylinder; an upper cover is provided at the top of the inner cylinder for closing the tops of the inner cylinder and the core pipe; a plurality of partition plates are uniformly distributed along the radial direction between the outer wall of the core pipe and the inner wall of the inner cylinder; the partition plates divide the inner part of the inner cylinder into a plurality of closed placement chambers for placing desiccants; the central angle of the placement chamber is β; adjacent preset numbers of the placement chambers are regeneration areas, and the rest of the placement chambers are drying areas; the central angle of the regeneration area is α; an air flow pipe with a closed bottom is coaxially placed in the core pipe; a first air flow chamber is formed between the air flow pipe and the core pipe; a second air flow chamber is formed between the inner cylinder and the outer cylinder; a first pipe partition and a second pipe partition are respectively arranged in the air flow pipe along the direction of the central angle α side line of the regeneration area; the first pipe partition and the second pipe partition divide the inner part of the air flow pipe into a first pipe cavity and a second pipe cavity with a central angle α; a plurality of through air flow holes are uniformly distributed on the pipe walls of the first pipe cavity and the second pipe cavity of the air flow pipe; a through air flow pipe hole is opened on the upper cover; the bottom of the first medium input pipe can movably pass through the air flow pipe hole and communicate with the first pipe cavity for inputting wet air to be dried; the bottom of the second medium input pipe can movably pass through the air flow pipe hole and communicate with the second pipe cavity for inputting dry air for regeneration; a plurality of through air permeable holes are uniformly distributed on the pipe walls of the core pipe on the left and right sides of the partition plate and the inner cylinder wall; a sealing plate is provided on the combination of the first medium input pipe, the second medium input pipe and the air flow pipe above the upper cover; a third sealing ring is provided on the top wall of the upper cover around the air flow pipe hole; the top wall of the third sealing ring is attached to the bottom wall of the sealing plate for closing the top of the first air flow chamber; an air flow pipe convex ring is provided on the outer wall of the bottom of the air flow pipe; the air permeable holes on the pipe wall of the core pipe are located above the air flow pipe convex ring; a fourth sealing ring is sleeved on the outer wall of the air flow pipe convex ring; the side surface of the fourth sealing ring away from the air flow pipe convex ring is attached to the inner wall of the core pipe for closing the bottom of the first air flow chamber; the diameter of the upper cover is larger than the diameter of the inner cylinder; a first sealing ring is provided on the top wall of the outer cylinder; the top wall of the first sealing ring is attached to the bottom wall of the outer peripheral area of the upper cover for closing the top of the second air flow chamber; an inner cylinder convex ring is provided on the outer wall of the bottom of the inner cylinder; the air permeable holes on the inner cylinder wall are located above the inner cylinder convex ring; a second sealing ring is sleeved on the outer wall of the inner cylinder convex ring; the side surface of the second sealing ring away from the inner cylinder convex ring is attached to the inner wall of the outer cylinder for closing the bottom of the second air flow chamber; a first sealing strip and a second sealing strip are respectively provided on the inner wall of the outer cylinder along the direction of the central angle α side line of the regeneration area; the side surfaces of the first sealing strip and the second sealing strip away from the outer cylinder are attached to the outer wall of the inner cylinder; the first sealing strip and the second sealing strip divide the second air flow chamber into a regeneration air flow output chamber and a drying air flow output chamber with a central angle αOn the outer wall of the air flow pipe, a third sealing strip and a fourth sealing strip are respectively arranged along the direction of the central angle α side line of the regeneration area; the side surfaces of the third sealing strip and the fourth sealing strip away from the air flow pipe are attached to the inner wall of the core pipe; the third sealing strip and the fourth sealing strip divide the first air flow chamber into a regeneration air flow input chamber and a to-be-dried air flow input chamber with a central angle α; the outer cylinder is respectively provided with a second medium output pipe communicated with the regeneration air flow output chamber and a first medium output pipe communicated with the dried air flow output chamber; the outer cylinder is provided with a driving device for stepwise driving the inner cylinder to rotate clockwise or counterclockwise by β°.

[0009] Optionally, a mesh partition board is arranged between adjacent partition boards; the partition board divides the placement chamber into a first placement chamber for placing desiccant and a second placement chamber for placing adsorbent.

[0010] Preferably, the upper cover above the first placement chamber is provided with a desiccant injection pipe communicated with it; the upper cover above the second placement chamber is provided with an adsorbent injection pipe communicated with it; sealing caps are arranged at the tops of the desiccant injection pipe and the adsorbent injection pipe.

[0011] Preferably, the outer cylinder is provided with a top cover at the top; the first medium input pipe and the second medium input pipe are fixedly connected to the top cover; one ends of the first medium input pipe and the second medium input pipe away from the air flow pipe both pass through the top cover and extend outside the top cover.

[0012] Optionally, the driving device includes a turbine arranged at the bottom of the inner cylinder and a stepping motor arranged on the outer cylinder; a worm is arranged on the output shaft of the motor; the turbine is meshed and connected with the worm.

[0013] Preferably, the areas on the left and right sides of the inner cylinder wall close to the partition board are sealing areas; the air permeable holes on the inner cylinder wall are located on the inner cylinder wall between adjacent sealing areas.

[0014] The present invention has at least the following beneficial effects:

[0015] It is provided with an outer cylinder, an inner cylinder is rotatably arranged inside the outer cylinder, a core pipe is arranged inside the inner cylinder, and a plurality of partition plates are evenly distributed along the radial direction between the core pipe and the inner cylinder. The partition plates divide the interior of the inner cylinder into a plurality of placement chambers with a central angle of β for placing desiccants. Adjacent preset numbers of placement chambers form a regeneration area with a central angle of α, and the remaining placement chambers are drying areas. An air flow pipe is placed inside the core pipe, and a first pipe partition and a second pipe partition are respectively arranged inside the air flow pipe along the side line direction of the central angle α of the regeneration area. The first pipe partition and the second pipe partition divide the interior of the air flow pipe into a first pipe cavity and a second pipe cavity with a central angle of α. The wet air to be dried is input from the first pipe cavity, and the regenerated dry air is input from the second pipe cavity. Along the side line direction of the central angle α of the regeneration area on the inner wall of the outer cylinder 1, a first sealing strip and a second sealing strip are respectively provided. The first sealing strip and the second sealing strip divide the second air flow chamber into a regeneration air flow output chamber and a drying air flow output chamber with a central angle of α. Along the side line direction of the central angle α of the regeneration area on the outer wall of the air flow pipe, a third sealing strip and a fourth sealing strip are respectively provided. The third sealing strip and the fourth sealing strip divide the first air flow chamber into a regeneration air flow input chamber and a wet air to be dried input chamber with a central angle of α. With this setting, the gas in the adsorption tower of the present application flows radially, which is beneficial to reducing the pressure drop. And a driving device is provided to drive the inner cylinder to rotate by β°. Every time the inner cylinder rotates by β°, that is, the position of one placement chamber, the placement chamber in the drying area with saturated adsorption will be rotated to the regeneration area for desiccant regeneration. At the same time, the placement chamber regenerated in the regeneration area is rotated to the drying area, and the regenerated desiccant performs the adsorption operation. Compared with the axial gas flow mode of the existing adsorption tower, as Figure 22 shown in the schematic diagram of the principle of the existing adsorption tower, hereinafter referred to as "axial", Figure 23 shown in the schematic diagram of the principle of the adsorption tower of the present application, hereinafter referred to as "radial". According to the Darcy formula of the pressure drop equation:

[0016]

[0017] where, Δp is the pressure drop of the gas passing through the pipeline; λ is the friction coefficient along the way; ρ is the density of the gas; v is the average velocity of the gas; h is the pipe length; s is the cross-sectional area of the pipeline.

[0018] The friction coefficient λ along the way is related to the Reynolds number Re and the relative roughness of the pipe wall i.e.,

[0019] Under the same pipeline conditions, it can be assumed that λ is a constant when the gas flows in the pipeline. Analyze the differences between the axial flow and the radial flow of the gas in the above situation.

[0020] First, from Equation (1.1), the pressure drop generated by the axial flow of the gas is:

[0021]

[0022] where, H轴 is the height of the adsorption tower; α is the central angle of the regeneration zone; R 轴 is the radius of the adsorption tower when the gas flows axially. It can be seen that in the axial flow mode, to reduce the pressure drop, only H can be reduced 轴 , or increase R 轴 , which results in the flattening of the actual product, increases the floor area, and is not conducive to productization.

[0023] Second, as can be seen from Equation (1.1), the pressure drop generated by the radial flow of the gas is:

[0024]

[0025] Further rearrangement of Equation (1.3) gives:

[0026]

[0027] where H 径 is the height of the adsorption tower; R1 is the outer diameter of the first gas flow chamber; R2 is the inner diameter of the second gas flow chamber; α is the central angle of the regeneration zone. It can be seen that in the radial flow mode, to reduce the pressure drop, with R1 and R2 unchanged, only H needs to be increased 径 , H 径 The increase of H will not bring an increase in the floor area and is conducive to productization. At the same time, the increase of H 径 will also increase the volume of the placement chamber, which can effectively solve the possible reduction in drying capacity caused by the reduction of the desiccant capacity when changing from axial to radial.

[0028] At the same time, compared with the axial flow mode in the prior art, the radial flow mode of the present application significantly increases the contact area between the gas and the desiccant, while the contact time is shorter. This optimized gas flow design significantly improves the contact efficiency between the gas and the desiccant, thereby greatly improving the adsorption efficiency of the desiccant.

[0029] It can be seen that a low-pressure-drop adsorption tower of the present application has the advantages of effectively reducing the pressure drop; at the same time, it has the advantage of improving the adsorption efficiency of the desiccant. Description of the Drawings

[0030] To more clearly illustrate the prior art and the present invention, the drawings required for describing the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only exemplary, and those of ordinary skill in the art can also obtain other drawings based on the provided drawings without creative efforts.

[0031] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present invention. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0032] Figure 1 Schematic diagram of an existing zero-air-consumption single-tower adsorption dryer;

[0033] Figure 2 Schematic diagram of the structure of a low-pressure-loss adsorption tower of the present invention;

[0034] Figure 3 Schematic diagram of the structure of a low-pressure-loss adsorption tower of the present invention with the upper cover removed;

[0035] Figure 4 Top view of a low-pressure-loss adsorption tower of the present invention;

[0036] Figure 5 For an attachment of a low-pressure-loss adsorption tower of the present invention Figure 4 A-A cross-sectional view;

[0037] Figure 6 For an attachment of a low-pressure-loss adsorption tower of the present invention Figure 5 Partial enlarged view of part B;

[0038] Figure 7 For an attachment of a low-pressure-loss adsorption tower of the present invention Figure 5 Partial enlarged view of part C;

[0039] Figure 8 For an attachment of a low-pressure-loss adsorption tower of the present invention Figure 5 Partial enlarged view of part D;

[0040] Figure 9 For an attachment of a low-pressure-loss adsorption tower of the present invention Figure 5 Partial enlarged view of part E;

[0041] Figure 10 Schematic diagram of the structure of the inner cylinder of a low-pressure-loss adsorption tower of the present invention;

[0042] Figure 11 Front view of the inner cylinder of a low-pressure-loss adsorption tower of the present invention;

[0043] Figure 12 For an attachment of a low-pressure-loss adsorption tower of the present invention Figure 11 F-F cross-sectional view;

[0044] Figure 13Structural schematic diagram of the air flow pipe of a low-pressure loss adsorption tower of the present invention;

[0045] Figure 14 Front view of the air flow pipe of a low-pressure loss adsorption tower of the present invention;

[0046] Figure 15 Attachment of a low-pressure loss adsorption tower of the present invention Figure 14 Cross-sectional view taken along the G-G direction;

[0047] Figure 16 Assembly state diagram of the inner cylinder and the air flow pipe of a low-pressure loss adsorption tower of the present invention;

[0048] Figure 17 Structural schematic diagram of the outer cylinder of a low-pressure loss adsorption tower of the present invention;

[0049] Figure 18 Front view of the outer cylinder of a low-pressure loss adsorption tower of the present invention;

[0050] Figure 19 Attachment of a low-pressure loss adsorption tower of the present invention Figure 18 Cross-sectional view taken along the H-H direction;

[0051] Figure 20 Assembly state schematic diagram of a low-pressure loss adsorption tower of the present invention;

[0052] Figure 21 Schematic diagram of an actual application of a low-pressure loss adsorption tower of the present invention;

[0053] Figure 22 Principle schematic diagram of the adsorption tower of the prior art zero-air-consumption single-tower adsorption dryer;

[0054] Figure 23 Principle schematic diagram of the applied adsorption tower;

[0055] Explanation of reference numerals:

[0056] 1. Outer cylinder; 2. Top cover; 3. First medium output pipe; 4. Second medium output pipe; 5. First medium input pipe; 6. Second medium input pipe; 7. Upper cover; 701. Desiccant injection pipe; 702. Adsorbent injection pipe; 8. Inner cylinder; 801. Core pipe; 802. Partition plate; 803. Sealing area; 804. Inner cylinder convex ring; 805. First placement chamber; 806. Second placement chamber; 9. Air flow pipe; 901. First pipe cavity; 902. Second pipe cavity; 903. Air flow pipe convex ring; 10. Motor; 11. Worm; 12. Turbine; 13. First sealing ring; 14. Second sealing ring; 15. Third sealing ring; 16. Sealing plate; 17. Partition board; 18. First sealing strip; 19. Second sealing strip; 20. Third sealing strip; 21. Fourth sealing strip; 22. First pipe partition; 23. Fourth sealing ring; 24. First air flow chamber; 25. Second air flow chamber; 26. Sealing cap; 27. Second pipe partition; 28. Placement chamber; 29. First pneumatic valve; 30. Second pneumatic valve; 31. Third pneumatic valve; 32. Fourth pneumatic valve. Detailed implementation manners

[0057] The following further details the present application through specific embodiments in conjunction with the accompanying drawings.

[0058] In the description of the present application: Unless otherwise specified, "a plurality of" means two or more. The terms "first", "second", "third", etc. in the present application are intended to distinguish the objects being referred to, and do not have special significance in terms of technical connotations (for example, they should not be understood as emphasizing the importance level or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0059] Terms such as "upper", "lower", "left", "right", "middle", etc. cited in the present application are usually for facilitating intuitive understanding with reference to the accompanying drawings, and are not absolute limitations on the positional relationships in actual products. Without departing from the technical concept disclosed in the present application, changes in these relative positional relationships should also be regarded as within the scope of the present application's description.

[0060] A low-pressure loss adsorption tower of the present invention, as Figures 2 to 20As shown in the figure, an outer cylinder 1, a first medium input pipe 5 and a second medium input pipe 6 are provided. An inner cylinder 8 is rotatably arranged in the outer cylinder 1. A bottom-closed core pipe 801 is coaxially and fixedly arranged inside the inner cylinder 8. An upper cover 7 is installed on the top of the inner cylinder 8 to seal the top of the inner cylinder 8 and the core pipe 801. A plurality of partition plates 17 are evenly distributed in the radial direction between the outer wall of the core pipe 801 and the inner wall of the inner cylinder 8. The partition plates 17 divide the inside of the inner cylinder 8 into a plurality of sealed placement chambers 28 for placing desiccants. The central angle of the placement chamber 28 is β; a preset number of adjacent placement chambers 28 are regeneration areas. In the embodiment of the present application, the number of placement chambers in the regeneration area is 2, and the remaining placement chambers 28 are drying areas. The central angle of the regeneration area is α. An air flow pipe 9 with a bottom closed is coaxially placed inside the core pipe 801. A first air flow chamber 24 is formed between the air flow pipe 9 and the core pipe 801, and a second air flow chamber 25 is formed between the inner cylinder 8 and the outer cylinder 1. A first pipe partition 22 and a second pipe partition 27 are respectively arranged inside the air flow pipe 9 along the direction of the α side line of the regeneration area central angle. The first pipe partition 22 and the second pipe partition 27 divide the inside of the air flow pipe 9 into a first pipe cavity 901 and a second pipe cavity 902. The central angle of the second pipe cavity 902 corresponds to α. A plurality of through air holes are evenly distributed on the pipe walls of the air flow pipe 9 of the first pipe cavity 901 and the second pipe cavity 902. The upper cover 7 is provided with a through air flow pipe hole. The bottom of the first medium input pipe 5 can movably pass through the air flow pipe hole and be fixedly connected to the air flow pipe 9 and communicate with the first pipe cavity 901 for inputting wet air to be dried; the bottom of the second medium input pipe 6 can movably pass through the air flow pipe hole and be fixedly connected to the air flow pipe 9 and communicate with the second pipe cavity 902 for inputting dry air for regeneration. A plurality of through air holes are evenly distributed on the pipe walls of the core pipe 801 on the left and right sides of the partition plate 17 and the barrel wall of the inner cylinder 8. To seal the first air flow chamber 24 and the second air flow chamber 25, a sealing plate 16 is provided on the combination of the first medium input pipe 5, the second medium input pipe 6 and the air flow pipe 9 above the upper cover 7. The top wall of the upper cover 7 around the air flow pipe hole is fixedly provided with a third sealing ring 15, so that the top wall of the third sealing ring 15 fits with the bottom wall of the sealing plate 16 to seal the top of the first air flow chamber 24; an air flow pipe convex ring 903 is provided on the outer wall of the bottom of the air flow pipe 9. The air holes on the pipe wall of the core pipe 801 are located above the air flow pipe convex ring 903. A fourth sealing ring 23 is sleeved on the outer wall of the air flow pipe convex ring 903, so that the side surface of the fourth sealing ring 23 away from the air flow pipe convex ring 903 fits with the inner wall of the core pipe 801 to seal the bottom of the first air flow chamber 24; the diameter of the upper cover 7 is made larger than the diameter of the inner cylinder 8. A first sealing ring 13 is fixedly provided on the top wall of the outer cylinder 1, so that the top wall of the first sealing ring 13 fits with the bottom wall of the outer peripheral area of the upper cover 7 to seal the top of the second air flow chamber 25; an inner cylinder convex ring 804 is provided on the outer wall of the bottom of the inner cylinder 8. The air holes on the barrel wall of the inner cylinder 8 are located above the inner cylinder convex ring 804. A second sealing ring 14 is sleeved on the outer wall of the inner cylinder convex ring 804, and the side surface of the second sealing ring 14 away from the inner cylinder convex ring 804 fits with the inner wall of the outer cylinder 1 to seal the bottom of the second air flow chamber 25.On the inner wall of the outer cylinder 1, a first sealing strip 18 and a second sealing strip 19 are fixedly arranged along the direction of the central angle α side line of the regeneration area. The side surfaces of the first sealing strip 18 and the second sealing strip 19 away from the outer cylinder 1 are attached to the outer wall of the inner cylinder 8. In this way, the first sealing strip 18 and the second sealing strip 19 divide the second air chamber 25 into a regeneration air flow output chamber and a drying air flow output chamber with a central angle α. On the outer wall of the air flow pipe 9, a third sealing strip 20 and a fourth sealing strip 21 are fixedly arranged along the direction of the central angle α side line of the regeneration area, so that the side surfaces of the third sealing strip 20 and the fourth sealing strip 21 away from the air flow pipe 9 are attached to the inner wall of the core pipe 801. In this way, the third sealing strip 20 and the fourth sealing strip 21 divide the first air chamber 24 into a regeneration air flow input chamber and a to-be-dried air flow input chamber with a central angle α. The outer cylinder 1 is respectively provided with a second medium output pipe 4 communicated with the regeneration air flow output chamber and a first medium output pipe 3 communicated with the drying air flow output chamber. A driving device is provided on the outer cylinder 1 for stepwise driving the inner cylinder 8 to rotate clockwise or counterclockwise by β°, so as to sequentially move the desiccant saturated by adsorption in the drying area to the regeneration area for regeneration operation, and at the same time send the regenerated desiccant in the regeneration area back to the drying area for drying operation.

[0061] Optionally, in some applications, not only is it required to obtain dry gas, but it is also necessary to filter impurities in the gas. For this purpose, an adsorption agent needs to be used. Therefore, a mesh partition plate 802 is provided between adjacent partition plates 17. The partition plate 802 divides the placement chamber 28 into a first placement chamber 805 for placing desiccant and a second placement chamber 806 for placing adsorption agent. In this way, while the wet air is dried by the desiccant, it will also be purified by the adsorption agent.

[0062] Preferably, for the convenience of adding desiccant and adsorption agent, a desiccant injection pipe 701 communicated with it is fixedly arranged on the upper cover 7 above the first placement chamber 805, and an adsorption agent injection pipe 702 communicated with it is fixedly arranged on the upper cover 7 above the second placement chamber 806. Sealing caps 26 are provided at the tops of the desiccant injection pipe 701 and the adsorption agent injection pipe 702. When adding desiccant and adsorption agent, the sealing cap 26 is opened, and the desiccant can be added to the first placement chamber 805 through the desiccant injection pipe 701, and the adsorption agent can be added to the second placement chamber 806 through the adsorption agent injection pipe 702.

[0063] Optionally, to realize the fixed installation of the first medium input pipe 5 and the second medium input pipe 6, a top cover 2 is installed on the top of the outer cylinder 1, and the first medium input pipe 5 and the second medium input pipe 6 are fixedly connected to the top cover 2. One ends of the first medium input pipe 5 and the second medium input pipe 6 away from the air flow pipe 9 both pass through the top cover 2 and extend outside the top cover 2.

[0064] Optionally, an exemplary structure of the driving device is provided in an embodiment of the present application, specifically: the driving device includes a turbine 12 disposed at the bottom of the inner cylinder 8 and a stepper motor 10 disposed outside the outer cylinder 1. It is set that one pulse of the motor 10 can drive the turbine 12 to rotate by β°. The output shaft of the motor 10 is fixedly connected to a worm 11, so that the turbine 12 and the worm 11 are meshed and connected.

[0065] Preferably, when the stepper motor stops rotating and the drying area and the regeneration area perform corresponding operations, the first sealing strip 18 and the second sealing strip 19 are in close contact and sealed with the outer wall of the inner cylinder 8. To prevent gas leakage that may be caused by the ventilation holes on the wall of the inner cylinder 8, the areas on the left and right sides of the inner cylinder 8 wall near the partition 17 are sealing areas 803, and the ventilation holes on the wall of the inner cylinder 8 are located on the wall of the inner cylinder 8 between adjacent sealing areas 803. The sealing area 803 thus avoids the existence of ventilation holes in the fitting area between the first sealing strip 18, the second sealing strip 19 and the wall of the inner cylinder 8, and avoids gas leakage between the regeneration air flow output chamber and the drying air flow output chamber.

[0066] The working principle of the present application is as follows:

[0067] In practical applications, as Figure 21 shown, a first pneumatic valve 29 is usually installed on the first medium input pipe 5, a second pneumatic valve 30 is installed on the second medium input pipe 6, a third pneumatic valve 31 is installed on the first medium output pipe 3, and a fourth pneumatic valve 32 is installed on the second medium output pipe 4. At the same time, the intermittent time of the motor 10 is set as the time when the desiccant in the placement chamber 28 in the drying area is saturated with adsorption (at this time, it is required that the desiccant in the placement chamber 28 in the regeneration area has been regenerated), or the time when the desiccant in the placement chamber 28 in the regeneration area is completely regenerated (at this time, it is required that the desiccant in the placement chamber 28 in the drying area has not reached the adsorption saturation), and the step rotation angle of the motor 10 is set as β°.

[0068] Open the first pneumatic valve 29, the second pneumatic valve 30, the third pneumatic valve 31 and the fourth pneumatic valve 32. Wait for the wet air to be dried to be input through the first medium input pipe 5, and then enter the first pipe cavity 901. It enters the drying air flow input chamber of the first air flow chamber 24 through the air holes of the air flow pipe 9, enters the placement chamber 28 in the drying area through the ventilation holes of the core pipe 801, and flows radially through the desiccant. The wet air to be dried is adsorbed and dried by the desiccant, and then is collected from the ventilation holes of the inner cylinder 8 into the drying air flow output chamber of the second air flow chamber 25 and is output through the first medium output pipe 3; the regenerated dry air is input through the second medium input pipe 6, and then enters the second pipe cavity 902. It enters the regeneration air flow input chamber of the first air flow chamber 24 through the air holes of the air flow pipe 9, enters the placement chamber 28 in the regeneration area through the ventilation holes of the core pipe 801, and flows radially through the desiccant. The saturated desiccant is regenerated, and then is collected from the ventilation holes of the inner cylinder 8 into the regeneration air flow output chamber of the second air flow chamber 25 and is output through the second medium output pipe 4.

[0069] When the desiccant in the placement chamber 28 of the drying area adjacent to the regeneration area is saturated by adsorption, or when the desiccant in the placement chamber 28 of the regeneration area adjacent to the drying area is completely regenerated, the first pneumatic valve 29, the second pneumatic valve 30, the third pneumatic valve 31, and the fourth pneumatic valve 32 are closed, and the motor 10 is started to drive the inner cylinder 8 to rotate by β°, that is, the position of one placement chamber 28. At this time, the placement chamber 28 with the desiccant in the drying area saturated by adsorption is rotated to the regeneration area, and the placement chamber 28 with the desiccant in the regeneration area completely regenerated is rotated to the drying area; then the first pneumatic valve 29, the second pneumatic valve 30, the third pneumatic valve 31, and the fourth pneumatic valve 32 are opened, and the drying and regeneration operations are continued, and the work is carried out in such a cycle.

[0070] In the above text, the present application has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be understood that based on the technical concept of the present application, several conventional adjustments or further innovations can also be made to these specific embodiments; but as long as they do not deviate from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A low-pressure-loss adsorption tower, comprising an outer cylinder (1), characterized in that, It also includes a first medium input pipe (5) and a second medium input pipe (6); an inner cylinder (8) is rotatably arranged in the outer cylinder (1); a core pipe (801) with a closed bottom is coaxially arranged in the inner cylinder (8); a top cover (7) is provided at the top of the inner cylinder (8) for closing the top of the inner cylinder (8) and the core pipe (801); a plurality of partition plates (17) are evenly distributed along the radial direction between the outer wall of the core pipe (801) and the inner wall of the inner cylinder (8); the partition plates (17) divide the interior of the inner cylinder (8) into a plurality of closed placement chambers (28) for placing desiccants; the central angle of the placement chamber (28) is β; adjacent preset numbers of the placement chambers (28) are regeneration zones, and the rest of the placement chambers (28) are drying zones; the central angle of the regeneration zone is α; an air flow pipe (9) with a closed bottom is coaxially placed in the core pipe (801); a first air flow chamber (24) is formed between the air flow pipe (9) and the core pipe (801); a second air flow chamber (25) is formed between the inner cylinder (8) and the outer cylinder (1); a first pipe partition (22) and a second pipe partition (27) are respectively arranged in the air flow pipe (9) along the side line direction of the central angle α of the regeneration zone; the first pipe partition (22) and the second pipe partition (27) divide the interior of the air flow pipe (9) into a first pipe cavity (901) and a second pipe cavity (902) with a central angle α; a plurality of through air flow holes are evenly distributed on the pipe walls of the air flow pipe (9) of the first pipe cavity (901) and the second pipe cavity (902); the top cover (7) is provided with a through air flow pipe hole; the bottom of the first medium input pipe (5) can movably pass through the air flow pipe hole and communicate with the first pipe cavity (901) for inputting wet air to be dried. The bottom of the second medium input pipe (6) can movably pass through the air flow pipe hole and communicate with the second pipe cavity (902) for inputting dry air for regeneration; a plurality of through air holes are uniformly distributed on the pipe walls of the core pipes (801) on the left and right sides of the partition plate (17) and the barrel wall of the inner cylinder (8); a sealing plate (16) is provided for the combination of the first medium input pipe (5), the second medium input pipe (6) and the air flow pipe (9) above the upper cover (7); a third sealing ring (15) is provided on the top wall of the upper cover (7) on the outer periphery of the air flow pipe hole; the top wall of the third sealing ring (15) is attached to the bottom wall of the sealing plate (16) for closing the top of the first air flow chamber (24); an air flow pipe convex ring (903) is provided on the outer wall of the bottom of the air flow pipe (9); the air holes on the pipe wall of the core pipe (801) are located above the air flow pipe convex ring (903); a fourth sealing ring (23) is sleeved on the outer wall of the air flow pipe convex ring (903); the side surface of the fourth sealing ring (23) away from the air flow pipe convex ring (903) is attached to the inner wall of the core pipe (801) for closing the bottom of the first air flow chamber (24); the diameter of the upper cover (7) is larger than the diameter of the inner cylinder (8); a first sealing ring (13) is provided on the top wall of the outer cylinder (1); the top wall of the first sealing ring (13) is attached to the bottom wall of the outer peripheral area of the upper cover (7) for closing the top of the second air flow chamber (25); an inner cylinder convex ring (804) is provided on the outer wall of the bottom of the inner cylinder (8); the air holes on the barrel wall of the inner cylinder (8) are located above the inner cylinder convex ring (804); a second sealing ring (14) is sleeved on the outer wall of the inner cylinder convex ring (804); the side surface of the second sealing ring (14) away from the inner cylinder convex ring (804) is attached to the inner wall of the outer cylinder (1) for closing the bottom of the second air flow chamber (25); a first sealing strip (18) and a second sealing strip (19) are respectively provided on the inner wall of the outer cylinder (1) along the central angle α side line direction of the regeneration area; the side surfaces of the first sealing strip (18) and the second sealing strip (19) away from the outer cylinder (1) are attached to the outer wall of the inner cylinder (8); the first sealing strip (18) and the second sealing strip (19) divide the second air flow chamber (25) into a regeneration air flow output chamber and a dry air flow output chamber with a central angle α; a third sealing strip (20) and a fourth sealing strip (21) are respectively provided on the outer wall of the air flow pipe (9) along the central angle α side line direction of the regeneration area; the side surfaces of the third sealing strip (20) and the fourth sealing strip (21) away from the air flow pipe (9) are attached to the inner wall of the core pipe (801); the third sealing strip (20) and the fourth sealing strip (21) divide the first air flow chamber (24) into a regeneration air flow input chamber and a to-be-dried air flow input chamber with a central angle α; the outer cylinder (1) is respectively provided with a second medium output pipe (4) communicating with the regeneration air flow output chamber and a first medium output pipe (3) communicating with the dry air flow output chamber;The outer cylinder (1) is provided with a driving device for stepwise driving the inner cylinder (8) to rotate clockwise or counterclockwise by β°.

2. The low-pressure loss adsorption tower according to claim 1, wherein, A mesh partition plate (802) is arranged between adjacent partition plates (17); the partition plate (802) divides the placement chamber (28) into a first placement chamber (805) for placing desiccants and a second placement chamber (806) for placing adsorbents.

3. The low-pressure loss adsorption tower according to claim 2, characterized in that, The top cover (7) above the first placement chamber (805) is provided with a desiccant injection pipe (701) communicating with it; the top cover (7) above the second placement chamber (806) is provided with an adsorbent injection pipe (702) communicating with it; sealing caps (26) are provided at the tops of the desiccant injection pipe (701) and the adsorbent injection pipe (702).

4. A low-pressure loss adsorption tower according to claim 3, wherein, A top cover (2) is provided at the top of the outer cylinder (1); the first medium input pipe (5) and the second medium input pipe (6) are fixedly connected to the top cover (2); one ends of the first medium input pipe (5) and the second medium input pipe (6) far from the air flow pipe (9) pass through the top cover (2) and extend outside the top cover (2).

5. A low-pressure-loss adsorption tower according to claim 1, wherein The driving device includes a turbine (12) arranged at the bottom of the inner cylinder (8) and a stepping motor (10) arranged in the outer cylinder (1); a worm (11) is provided on the output shaft of the motor (10); the turbine (12) is meshed and connected with the worm (11).

6. The low-pressure loss adsorption tower according to claim 1, wherein, The regions of the inner cylinder (8) wall near the left and right sides of the partition (17) are sealing regions (803); the ventilation holes in the inner cylinder (8) wall are located in the inner cylinder (8) wall between adjacent sealing regions (803).

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