Zero gas consumption single tower adsorption dryer

Abstract

The present invention relates to a zero-gas-consumption single-tower adsorption dryer. The adsorption tower includes an outer tube and an inner tube rotatably disposed therein. A core tube is disposed within the inner tube, and a partition divides the inner tube into a plurality of placement chambers for placing desiccant. A predetermined number of adjacent placement chambers serve as regeneration zones with a central angle α, and the remaining placement chambers serve as drying zones. An airflow tube is disposed within the core tube, and a first pipe partition and a second pipe partition disposed within the airflow tube along the edge direction of the central angle α divide the interior of the airflow tube into a first tube cavity and a second tube cavity with a central angle α. A first sealing strip and a second sealing strip disposed along the edge direction of the central angle α divide the second airflow chamber into a regeneration airflow output chamber with a central angle α and a drying airflow output chamber. A third sealing strip and a fourth sealing strip disposed along the edge direction of the central angle α divide the first airflow chamber into a regeneration airflow input chamber with a central angle α and an airflow input chamber to be dried, thereby allowing the gas in the adsorption tower of the present application to flow radially, thereby reducing pressure drop and the cost of use.

Description

Technical Field

[0001] The present invention relates to the technical field of gas drying, in particular to a zero-gas-consumption single-tower adsorption dryer. Background Art

[0002] Adsorption dryers are widely used to dry compressed gases. In order to lower the dew point of the gas, the desiccant needs to be regenerated in time. Figure 1 The diagram shows a conventional zero-gas consumption single-tower adsorption dryer. The adsorption tower 1' is divided into a drying zone and a regeneration zone. A drive unit rotates the adsorption tower 1', moving the desiccant in the drying zone to the regeneration zone for regeneration. The regenerated desiccant is then returned to the drying zone for use in drying hot and humid air. Desiccant regeneration in the regeneration zone typically involves introducing a portion of the gas dried in the drying zone into the regeneration zone. This dried gas then regenerates the desiccant in the regeneration zone.

[0003] In order to optimize the gas recovery process after regeneration and achieve zero gas consumption, it is necessary to reintroduce these regenerated gases into the drying area for drying treatment, because the regenerated gas contains a large amount of water. The adsorption tower 1' in the prior art adopts an axial gas flow method. The gas will encounter greater resistance when passing through the desiccant, resulting in a significant pressure drop. At the same time, the hot and humid gas provided by the air compressor 2' usually has a higher pressure, while the gas in the regeneration zone has a relatively low pressure drop. This pressure difference causes the gas in the regeneration zone to be unable to effectively mix with the hot and humid gas from the air compressor 2' and enter the adsorption tower 1', thereby affecting the flow and circulation of the gas, affecting the regeneration of the desiccant, and reducing the overall performance of the dryer.

[0004] In order to reduce the resistance brought by the desiccant and reduce the gas pressure drop, a desiccant with a smaller resistance coefficient is usually selected, such as a honeycomb desiccant, but this will increase the use cost of the dryer. In addition, an ejector 3' can be provided in the system to improve the mixing process of the regeneration gas and the hot and humid gas. The working principle of the ejector 3' is similar to that of a venturi tube. The hot and humid gas is ejected at high speed through the ejector 3' to generate a negative pressure, thereby sucking in the regeneration gas, and the two are mixed and sent to the adsorption tower 1'. Although the ejector 3' can effectively solve the problem of the integration of the regeneration 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 enough to completely absorb the regeneration 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 a desiccant with a smaller resistance coefficient, and still does not solve the problem of relatively high use cost. Summary of the Invention

[0005] To this end, the present invention provides a zero-gas-consumption single-tower adsorption dryer, which mainly solves the technical problems of the prior art zero-gas-consumption single-tower adsorption dryer, which uses an axial gas flow mode to effectively overcome the large pressure drop, resulting in high operating costs, poor circulation of the entire dryer system, affecting the regeneration of the desiccant and the overall performance of the dryer, and being unable to adapt to low-pressure air compressors.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A zero-gas-consumption single-tower adsorption dryer comprises an adsorption tower, a first pipe for inputting wet air to be dried, and a second pipe for outputting dry air; further comprising an ejector, a third pipe, a fourth pipe, a first medium input pipe, and a second medium input pipe; the adsorption tower comprises an outer cylinder; 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 on the top of the inner cylinder for sealing the inner cylinder and the top of the core pipe; a plurality of partitions are uniformly distributed radially between the outer wall of the core pipe and the inner wall of the inner cylinder; the partitions divide the interior of the inner cylinder into a plurality of sealed placement chambers for placing desiccant; the central angle of the placement chamber is β; a preset number of adjacent placement chambers are regeneration zones, and the remaining placement chambers are drying zones Zone; the central angle of the regeneration zone is α; an airflow tube with a closed bottom is placed coaxially in the core tube; a first airflow chamber is formed between the airflow tube and the core tube; a second airflow chamber is formed between the inner tube and the outer tube; a first pipe partition and a second pipe partition are respectively provided in the airflow tube along the edge direction of the central angle α of the regeneration zone; the first pipe partition and the second pipe partition divide the interior of the airflow tube into a first tube cavity and a second tube cavity with a central angle α; the walls of the airflow tubes of the first tube cavity and the second tube cavity are evenly distributed with a plurality of through airflow holes; the upper cover is provided with a through airflow hole; the bottom of the first medium input tube can be movably passed through the airflow hole to be connected with the first tube cavity; the bottom of the second medium input tube can be movably passed through the airflow hole The cam is connected to the second tube cavity through the air flow tube hole; the core tube wall and the inner tube wall on the left and right sides of the partition are evenly distributed with a plurality of through-going air holes; the combination of the first medium input tube, the second medium input tube and the air flow tube above the upper cover is provided with a sealing plate; the top wall of the upper cover around the air flow tube hole is provided with a third sealing ring; the top wall of the third sealing ring fits with the bottom wall of the sealing plate, for closing the top of the first air flow chamber; the outer wall of the bottom of the air flow tube is provided with an air flow tube convex ring; the air hole in the core tube wall is located above the air flow tube convex ring; the outer wall of the air flow tube convex ring is provided with a fourth sealing ring; the side surface of the fourth sealing ring away from the air flow tube convex ring fits with the inner wall of the core tube, for closing the first The bottom of the air flow chamber is closed; the diameter of the upper cover is larger than the diameter of the inner cylinder; the top wall of the outer cylinder is provided with a first sealing ring; the top wall of the first sealing ring is in contact with the bottom wall of the peripheral area of the upper cover, so as to close the top of the second air flow chamber; the outer wall of the bottom of the inner cylinder is provided with an inner cylinder convex ring; the air vent of the inner cylinder wall is located above the inner cylinder convex ring; the outer wall of the inner cylinder convex ring is sleeved with a second sealing ring; the side surface of the second sealing ring away from the inner cylinder convex ring is in contact with the inner wall of the outer cylinder, so as to seal the bottom of the second air flow chamber; the inner wall of the outer cylinder is provided with a first sealing strip and a second sealing strip respectively along the edge direction of the central angle α of the regeneration zone; the side surfaces of the first sealing strip and the second sealing strip away from the outer cylinder are in contact with 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 α; the outer wall of the air flow tube is provided with a third sealing strip and a fourth sealing strip respectively along the edge direction of the central angle α of the regeneration zone; the third sealing strip and the fourth sealing strip are in contact with the inner wall of the core tube on the side away from the air flow tube; 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 provided with a second medium output pipe communicating with the regeneration air flow output chamber and a first medium output pipe communicating with the drying air flow output chamber; the first pipeline is communicated with the injector inlet; the first medium input pipe is provided with a first pneumatic valve, and its end away from the first tube cavity is communicated with the injector outlet; the The first medium input pipe between the ejector and the first tube cavity is provided with a first cooler; the second medium output pipe is provided with a fourth pneumatic valve; the end of the second medium output pipe away from the outer cylinder is connected to the ejector adsorption port; one end of the third pipe is connected to the second pipe, and the other end is connected to the end of the first medium output pipe away from the outer cylinder; the first medium output pipe is provided with a third pneumatic valve; one end of the fourth pipe is connected to the end of the second medium input pipe away from the second tube cavity, and the other end is connected to the third pipe through a sixth pipe; the second medium input pipe is provided with a second pneumatic valve; the outer cylinder is provided with a driving device for stepwise driving the inner cylinder to rotate β° clockwise or counterclockwise when the first, second, third, and fourth pneumatic valves are closed.

[0008] Preferably, the sixth pipeline is provided with a drying tower.

[0009] Preferably, the sixth pipeline is further provided with a fifth pneumatic valve.

[0010] Preferably, a fifth pipeline is provided between the third pipeline and the fourth pipeline; and the fifth pipeline is provided with a second cooler.

[0011] Preferably, the fifth pipeline is further provided with a sixth pneumatic valve.

[0012] Optionally, a mesh partition plate is provided between adjacent partitions; the partition plate divides the placement chamber into a first placement chamber for placing a desiccant and a second placement chamber for placing an adsorbent.

[0013] Preferably, the upper cover above the first placement chamber is provided with a desiccant injection pipe connected thereto; the upper cover above the second placement chamber is provided with an adsorbent injection pipe connected thereto; and the tops of the desiccant injection pipe and the adsorbent injection pipe are both provided with sealing caps.

[0014] Preferably, a top cover is provided on the top of the outer cylinder; the first medium input pipe and the second medium input pipe are fixedly connected to the top cover; the first medium input pipe and the second medium input pipe both pass through the top cover at one end away from the air flow pipe and extend out of the top cover.

[0015] Optionally, the driving device includes a turbine arranged at the bottom of the inner cylinder and a stepping motor arranged at the outer cylinder; the output shaft of the motor is provided with a worm; the turbine and the worm are meshingly connected.

[0016] Preferably, the areas on the left and right sides of the inner cylinder wall close to the partition are sealed areas; and the air holes on the inner cylinder wall are located on the inner cylinder wall adjacent to the sealed areas.

[0017] The present invention has at least the following beneficial effects:

[0018] The adsorption tower comprises an outer tube, an inner tube rotatably mounted within the outer tube, a core tube mounted within the inner tube, and multiple partitions radially spaced evenly between the core tube and the inner tube. The partitions divide the interior of the inner tube into multiple chambers with a central angle β for storing desiccant. A predetermined number of adjacent chambers serve as regeneration zones with a central angle α, while the remaining chambers serve as drying zones. An airflow tube is mounted within the core tube, and a first duct partition and a second duct partition are disposed within the airflow tube along the edge of the regeneration zone at a central angle α, respectively. The first and second duct partitions divide the interior of the airflow tube into a first lumen and a second lumen at a central angle α. Wet air to be dried is input through the first lumen, while regenerated dry air is input through the second lumen. A first sealing strip and a second sealing strip are disposed on the inner wall of the outer tube along the edge of the regeneration zone at a central angle α, respectively. The first and second sealing strips divide the second airflow chamber into a regeneration airflow output chamber and a drying airflow output chamber at a central angle α, respectively. The outer wall of the airflow tube is provided with a third sealing strip and a fourth sealing strip along the edge direction of the central angle α of the regeneration zone. The third sealing strip and the fourth sealing strip separate the first airflow chamber into a regeneration airflow input chamber with a central angle α and an airflow input chamber to be dried. This arrangement allows the gas in the adsorption tower of the dryer of the present application to flow radially, which is beneficial to reducing the pressure drop. And the driving device is provided to drive the inner cylinder to rotate β°. Every time the inner cylinder rotates β°, that is, one placement chamber position, the placement chamber with saturated adsorption in the drying zone will be rotated to the regeneration zone for desiccant regeneration. At the same time, the placement chamber regenerated in the regeneration zone is rotated to the drying zone, and the regenerated desiccant performs adsorption operation. Compared with the axial flow mode of gas in the adsorption tower of the dryer in the prior art, such as Figure 23 The figure shows the principle diagram of the adsorption tower of the prior art dryer, hereinafter referred to as "axis". Figure 24 The schematic diagram of the adsorption tower of the dryer of the present application is shown, hereinafter referred to as "diameter", according to the Darcy formula of the pressure drop equation:

[0019]

[0020] Among them, Δp is the pressure drop of gas through the pipeline; λ is the friction coefficient along the pipeline; ρ is the velocity of the gas; v is the average velocity of the gas; h is the pipe length; and s is the cross-sectional area of the pipeline.

[0021] Friction coefficient λ along the pipe, Reynolds number Re, and relative roughness of the pipe wall Related, that is

[0022] Under the same pipeline conditions, it can be assumed that when the gas flows in the pipeline,

[0023] Is a constant. Analyze the difference between axial and radial gas flows in the above case.

[0024] 1. From formula (1.1), we can see that the pressure drop caused by axial flow of gas is:

[0025]

[0026] Among them, H 轴 is the height of the adsorption tower; α is the central angle of the regeneration zone; R 轴 It 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, the only way is to reduce H 轴 , or increase R 轴 This results in the actual product being flattened, increasing the floor space, and making it difficult to commercialize.

[0027] 2. From formula (1.1), we can see that the pressure drop caused by radial gas flow is:

[0028]

[0029] Further arrangement of formula (1.3) yields:

[0030]

[0031] Among them H 径 is the height of the adsorption tower; R1 is the outer diameter of the first airflow chamber; R2 is the inner diameter of the second airflow chamber; α is the central angle of the regeneration zone. It can be seen that in radial flow mode, to reduce the pressure drop, when R1 and R2 remain unchanged, it is only necessary to increase H. 径 , H 径 The increase in H will not increase the floor space, and it is easy to productize. 径 The increase will also increase the volume of the placement chamber, which can effectively solve the problem of reduced drying capacity caused by the reduction of desiccant capacity when the axial direction is changed to radial direction.

[0032] At the same time, compared to the axial flow method in the prior art, the radial flow method of the present application significantly increases the contact area between the gas and the desiccant, while also shortening the contact time. This optimized airflow design significantly improves the contact efficiency between the gas and the desiccant, thereby greatly improving the adsorption efficiency of the desiccant.

[0033] It can be seen that the zero-gas-consumption single-tower adsorption dryer of the present application has the advantages of low pressure drop, reduced use cost, smooth system operation, etc.; at the same time, it has the advantage of improving the adsorption efficiency of the desiccant. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] To more clearly illustrate the prior art and the present invention, the following briefly introduces the drawings required for describing the prior art and the embodiments of the present invention. Obviously, the drawings described below are merely illustrative, and those skilled in the art can derive other drawings based on the provided drawings without inventive effort.

[0035] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented. Any structural modifications, changes in proportions, or adjustments in sizes should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention.

[0036] Figure 1 This is a schematic diagram of a zero-gas-consumption single-tower adsorption dryer in the prior art;

[0037] Figure 2 It is a structural schematic diagram of the zero gas consumption single-tower adsorption dryer of the present invention;

[0038] Figure 3 It is a structural schematic diagram of the adsorption tower of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0039] Figure 4 This is a structural schematic diagram of the adsorption tower of the zero-gas-consumption single-tower adsorption dryer of the present invention without the upper cover;

[0040] Figure 5 A top view of the adsorption tower of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0041] Figure 6 This is an accessory of the zero gas consumption single tower adsorption dryer of the present invention. Figure 5 AA sectional view;

[0042] Figure 7 This is an accessory of the zero gas consumption single tower adsorption dryer of the present invention. Figure 6 A partial enlarged view of part B;

[0043] Figure 8 This is an accessory of the zero gas consumption single tower adsorption dryer of the present invention. Figure 6 A partial enlarged view of part C;

[0044] Figure 9 This is an accessory of the zero gas consumption single tower adsorption dryer of the present invention. Figure 6 A partial enlarged view of the D portion;

[0045] Figure 10 This is an accessory of the zero gas consumption single tower adsorption dryer of the present invention. Figure 6 A partial enlarged view of part E;

[0046] Figure 11 Schematic diagram of the structure of the inner cylinder of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0047] Figure 12 It is a front view of the inner cylinder of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0048] Figure 13 This is an accessory of the zero gas consumption single tower adsorption dryer of the present invention. Figure 12 FF cross-sectional view;

[0049] Figure 14 Schematic diagram of the structure of the air flow pipe of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0050] Figure 15 It is a front view of the air flow pipe of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0051] Figure 16 This is an accessory of the zero gas consumption single tower adsorption dryer of the present invention. Figure 15 GG cross-sectional view;

[0052] Figure 17 FIG1 is an assembly diagram of the inner cylinder and the air flow pipe of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0053] Figure 18 This is a schematic structural diagram of the outer cylinder of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0054] Figure 19 It is a front view of the outer cylinder of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0055] Figure 20 This is an accessory of the zero gas consumption single tower adsorption dryer of the present invention. Figure 19 HH sectional view;

[0056] Figure 21 This is a schematic diagram of the adsorption tower assembly state of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0057] Figure 22 This is a schematic diagram of the working principle of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0058] Figure 23 This is a schematic diagram of the principle of the adsorption tower of the prior art zero-gas-consumption single-tower adsorption dryer;

[0059] Figure 24 Schematic diagram of the adsorption tower for applying for a zero-gas-consumption single-tower adsorption dryer;

[0060] Description of reference numerals:

[0061] 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. Top 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 storage chamber; 806. Second storage chamber; 9. Airflow pipe; 901. First tube cavity; 902. Second tube cavity; 903. Airflow 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 plate; 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; 33, first pipe; 34, second pipe; 35, third pipe; 36, fourth pipe; 37, fifth pipe; 38, sixth pipe; 39, ejector; 40, first cooler; 41, second cooler; 42, drying tower; 43, fifth pneumatic valve; 44, sixth pneumatic valve. DETAILED DESCRIPTION

[0062] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0063] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0064] Terms such as "upper," "lower," "left," "right," and "center" used in this application are generally intended to facilitate intuitive understanding when compared with the accompanying drawings and are not intended to be absolute limitations on positional relationships in actual products. Changes to these relative positional relationships are considered within the scope of this application without departing from the technical concepts disclosed herein.

[0065] The zero gas consumption single tower adsorption dryer of the present invention is as follows Figures 2 to 21As shown, an adsorption tower, a first pipe 33, and a second pipe 34 are provided. The first pipe 33 is typically connected to an air compressor to input wet air to be dried, while the second pipe 34 is used to output the dried dry air. Also provided are an ejector 39, a third pipe 35, a fourth pipe 36, a first medium inlet pipe 5, and a second medium inlet pipe 6. The adsorption tower comprises an outer cylinder 1, within which an inner cylinder 8 is rotatably mounted. A core pipe 801, with a closed bottom, is coaxially fixed within the inner cylinder 8. A top cover 7 is mounted on the top of the inner cylinder 8 to seal the inner cylinder 8 and the top of the core pipe 801. Multiple partitions 17 are radially distributed between the outer wall of the core pipe 801 and the inner wall of the inner cylinder 8. The partitions 17 divide the interior of the inner cylinder 8 into multiple sealed storage chambers 28 for storing desiccant. The central angle of each storage chamber 28 is β. A predetermined number of adjacent storage chambers 28 serve as regeneration zones. In this embodiment, the number of storage chambers in the regeneration zone is two, while the remaining storage chambers 28 serve as drying zones. The central angle of each regeneration zone is α. An airflow tube 9 with a closed bottom is coaxially placed inside the core tube 801. A first airflow chamber 24 is formed between the airflow tube 9 and the core tube 801, and a second airflow chamber 25 is formed between the inner tube 8 and the outer tube 1. A first duct baffle 22 and a second duct baffle 27 are respectively arranged inside the airflow tube 9 along the edge direction of the central angle α of the regeneration zone. The first duct baffle 22 and the second duct baffle 27 divide the interior of the airflow tube 9 into a first lumen 901 and a second lumen 902, and the central angle of the second lumen 902 corresponds to α. Multiple through-holes are evenly distributed on the walls of the airflow tube 9 in the first lumen 901 and the second lumen 902. The upper cover 7 is provided with through-holes. The bottom of the first medium input tube 5 can be movably passed through the airflow holes to be fixedly connected to the airflow tube 9 and communicate with the first lumen 901; the bottom of the second medium input tube 6 can be movably passed through the airflow holes to be fixedly connected to the airflow tube 9 and communicate with the second lumen 902. The core tube 801 tube wall and the inner tube 8 tube wall on the left and right sides of the partition 17 are evenly distributed with multiple through-going air holes.In order to seal the first airflow chamber 24 and the second airflow chamber 25, a sealing plate 16 is provided on the assembly of the first medium input pipe 5, the second medium input pipe 6 and the airflow pipe 9 above the upper cover 7. A third sealing ring 15 is fixedly provided on the top wall of the upper cover 7 around the airflow pipe hole, so that the top wall of the third sealing ring 15 fits with the bottom wall of the sealing plate 16, thereby sealing the top of the first airflow chamber 24. An airflow pipe convex ring 903 is provided on the outer wall of the bottom of the airflow pipe 9. The air vent of the core pipe 801 is located above the airflow pipe convex ring 903. A fourth sealing ring 23 is sleeved on the outer wall of the airflow pipe convex ring 903, so that the fourth sealing ring 23 is away from the airflow pipe convex ring 90 3. One side of the outer tube 1 is in contact with the inner wall of the core tube 801, sealing the bottom of the first airflow chamber 24. The diameter of the upper cover 7 is larger than that of the inner tube 8. A first sealing ring 13 is fixedly mounted on the top wall of the outer tube 1, with the top wall of the first sealing ring 13 in contact with the bottom wall of the outer peripheral area of the upper cover 7, sealing the top of the second airflow chamber 25. An inner tube convex ring 804 is mounted on the outer wall of the inner tube 8, with the air vents in the inner tube 8 wall located above the inner tube convex ring 804. A second sealing ring 14 is sleeved on the outer wall of the inner tube convex ring 804. The side of the second sealing ring 14 facing away from the inner tube convex ring 804 is in contact with the inner wall of the outer tube 1, sealing the bottom of the second airflow chamber 25. A first sealing strip 18 and a second sealing strip 19 are fixedly mounted on the inner wall of the outer tube 1, respectively, along the edge of the central angle α of the regeneration zone. The sides of the first and second sealing strips 18, 19 facing away from the outer tube 1 are in contact with the outer wall of the inner tube 8. In this way, the first and second sealing strips 18, 19 divide the second airflow chamber 25 into a regeneration airflow output chamber and a drying airflow output chamber at a central angle α. A third and fourth sealing strips 20, 21 are fixedly mounted on the outer wall of the airflow tube 9 along the edge of the regeneration zone at the central angle α, so that the sides of the third and fourth sealing strips 20, 21, facing away from the airflow tube 9, abut against the inner wall of the core tube 801. In this way, the third and fourth sealing strips 20, 21 divide the first airflow chamber 24 into a regeneration airflow input chamber and a drying airflow input chamber at a central angle α. The outer cylinder 1 is provided with a second medium output pipe 4, which communicates with the regeneration airflow output chamber, and a first medium output pipe 3, which communicates with the drying airflow output chamber. The first conduit 33 is connected to the inlet of the ejector 39. A first pneumatic valve 29 is mounted on the first medium input pipe 5, and its end facing away from the first lumen 901 is connected to the outlet of the ejector 39. The first medium input pipe 5 between the ejector 39 and the first lumen 901 is equipped with a first cooler 40. The first cooler 40 can be a commercially available cooler, which is well known to those skilled in the art and will not be described in detail here. The first cooler 40 cools the humid air input from the air compressor, removing a certain amount of moisture. The second medium output pipe 4 is equipped with a fourth pneumatic valve 32. The end of the second medium output pipe 4 away from the outer tube 1 is connected to the suction port of the ejector 39. One end of the third pipe 35 is connected to the second pipe 34, and the other end is connected to the end of the first medium output pipe 3 away from the outer tube 1. The first medium output pipe 3 is equipped with a third pneumatic valve 31.One end of the fourth conduit 36 is connected to the end of the second medium inlet conduit 6 remote from the second lumen 902, and the other end is connected to the third conduit 35 via the sixth conduit 38. The second medium inlet conduit 6 is provided with a second pneumatic valve 30. A drive device is provided within the outer cylinder 1 for progressively rotating the inner cylinder 8 clockwise or counterclockwise by β° when the first, second, third, and fourth pneumatic valves 29, 30, 31, and 32 are closed. This sequentially moves desiccant in the drying zone that has reached adsorption saturation to the regeneration zone for regeneration, and simultaneously returns desiccant regenerated from the regeneration zone to the drying zone for drying.

[0066] Preferably, the sixth pipe 38 introduces dried dry air to regenerate the desiccant in the regeneration zone. To further improve the dryness of the regenerated dry air, the sixth pipe 38 is provided with a drying tower 42. The drying tower 42 is a commercially available product, which is well known to those skilled in the art and will not be described in detail here. The regenerated dry air is further dried by the drying tower 42 to remove a certain amount of moisture, thereby improving its dryness and increasing the regeneration capacity.

[0067] Preferably, in order to control the regeneration operation, for example, to stop the regeneration operation after the regeneration operation is completed, the sixth pipeline 38 is further provided with a fifth pneumatic valve 43.

[0068] Preferably, the drying capacity of the desiccant is related to the performance of the dryer. Therefore, in order to further improve the regeneration capacity, a fifth pipe 37 is provided between the third pipe 35 and the fourth pipe 36. The fifth pipe 37 is provided with a second cooler 41. The second cooler 41 can be a commercially available cooler, which is well known to those skilled in the art and will not be described in detail here. The second cooler 41 cools the dry air to further remove a certain amount of moisture, thereby increasing its dryness and improving the regeneration capacity.

[0069] Preferably, at the same time, in order to control the regeneration operation, for example, the regeneration operation can be stopped after the regeneration operation is completed, a sixth pneumatic valve 44 is further provided in the fifth pipeline 37 .

[0070] Furthermore, through the control of the fifth pneumatic valve 43 and the sixth pneumatic valve 44, the second cooler 41 and the drying tower 42 can operate together or separately, and the dryness of the desiccant can be adjusted by further drying the regenerated dry air, thereby adjusting the drying capacity of the dryer to obtain different drying dew points, so that the dryer of the present application has stronger adaptability.

[0071] Alternatively, in some applications, it is not only necessary to obtain dry gas but also to filter impurities in the gas, which requires the use of an adsorbent. To this end, a mesh partition 802 is provided between adjacent partitions 17. The partition 802 divides the storage chamber 28 into a first storage chamber 805 for storing the desiccant and a second storage chamber 806 for storing the adsorbent. In this way, the humid air is dried by the desiccant and purified by the adsorbent at the same time.

[0072] Preferably, to facilitate the addition of desiccant and adsorbent, a desiccant injection tube 701 is fixedly installed on the upper cover 7 above the first storage chamber 805, and an adsorbent injection tube 702 is fixedly installed on the upper cover 7 above the second storage chamber 806. Both the desiccant injection tube 701 and the adsorbent injection tube 702 are topped with sealing caps 26. To add desiccant and adsorbent, the sealing caps 26 are opened, and desiccant can be added to the first storage chamber 805 through the desiccant injection tube 701, and adsorbent can be added to the second storage chamber 806 through the adsorbent injection tube 702.

[0073] Optionally, in order to achieve 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. The first medium input pipe 5 and the second medium input pipe 6 at one end away from the airflow pipe 9 both pass through the top cover 2 and extend out of the top cover 2.

[0074] Optionally, an embodiment of the present application provides a preferred structure of the driving device, specifically: 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, and one pulse of the motor 10 is set to drive the turbine 12 to rotate β°, and the output shaft of the motor 10 is fixedly connected to the worm 11, so that the turbine 12 and the worm 11 are engaged and connected.

[0075] Preferably, when the stepping motor stops rotating and the drying and regeneration zones are performing corresponding operations, the first and second sealing strips 18, 19, and the outer wall of the inner tube 8 are in close contact and sealed. To prevent gas leakage caused by vents in the wall of the inner tube 8, the areas on the left and right sides of the wall of the inner tube 8 near the partition 17 are sealed areas 803. The vents in the wall of the inner tube 8 are located in the wall of the inner tube 8 between adjacent sealed areas 803. The sealed areas 803 prevent the presence of vents in the areas where the first and second sealing strips 18, 19, and the wall of the inner tube 8 meet, thereby preventing gas leakage between the regeneration airflow output chamber and the drying airflow output chamber.

[0076] Here's how this application works:

[0077] like Figure 22As shown, the intermittent time of the motor 10 is first set to the time when the desiccant in the placement chamber 28 of the drying zone is adsorbed to saturation (at this time, the desiccant in the placement chamber 28 of the regeneration zone needs to have been regenerated), or the time when the desiccant in the placement chamber 28 of the regeneration zone is completely regenerated (at this time, the desiccant in the placement chamber 28 of the drying zone needs not to reach adsorption saturation), and the step rotation angle of the motor 10 is set to β°.

[0078] Open the first pneumatic valve 29, the second pneumatic valve 30, the third pneumatic valve 31 and the fourth pneumatic valve 32, and at the same time open the fifth pneumatic valve 43. The wet air to be dried is input from the first pipe 33, passes through the ejector 39, enters the first cooler 40 for cooling and dehydration, then enters the first medium input pipe 5, and then enters the first tube cavity 901. It enters the air flow input chamber to be dried of the first air flow chamber 24 through the air flow holes of the air flow pipe 9, enters the placement chamber 28 of the drying area through the air holes of the core tube 801, flows radially through the desiccant, and the wet air to be dried is adsorbed and dried by the desiccant. It is then collected from the air holes of the inner cylinder 8 to the dry air flow output of the second air flow chamber 25. The regenerated dry air is inputted from the sixth pipe 38, passes through the fourth pipe 36, enters the second medium input pipe 6, and then enters the second tube cavity 902. It enters the regeneration air flow input chamber of the first air flow chamber 24 through the air flow holes of the air flow tube 9, enters the placement chamber 28 of the regeneration zone through the air holes of the core tube 801, flows radially through the desiccant, and the adsorption saturated desiccant is regenerated. It is then collected from the air holes of the inner tube 8 to the regeneration air flow output chamber of the second air flow chamber 25, outputted from the second medium output pipe 4, and sucked in and recovered by the ejector 39, achieving zero emission and zero gas consumption.

[0079] When the desiccant in the placement chamber 28 of the drying zone adjacent to the regeneration zone is saturated with adsorption, or the desiccant in the placement chamber 28 of the regeneration zone adjacent to the drying zone 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, the motor 10 is started, and the inner cylinder 8 is driven to rotate β°, that is, the position of one placement chamber 28. At this time, the placement chamber 28 in which the desiccant in the drying zone is saturated with adsorption is transferred to the regeneration zone, and the placement chamber 28 in which the desiccant in the regeneration zone is completely regenerated is transferred to the drying zone; then the first pneumatic valve 29, the second pneumatic valve 30, the third pneumatic valve 31 and the fourth pneumatic valve 32 are opened to continue the drying and regeneration operations, and the operation is repeated in this cycle.

[0080] The present application has been described in a relatively specific and detailed manner through general explanations and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations may be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by such conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. A zero-gas-consumption single-tower adsorption dryer comprising an adsorption tower, a first pipe (33) for inputting wet air to be dried, and a second pipe (34) for outputting dry air, characterized in that: It also includes an ejector (39), a third pipe (35), a fourth pipe (36), a first medium input pipe (5) and a second medium input pipe (6); the adsorption tower includes an outer cylinder (1); an inner cylinder (8) is rotatably arranged in the outer cylinder (1); a core tube (801) with a closed bottom is coaxially arranged in the inner cylinder (8); an upper cover (7) is provided on the top of the inner cylinder (8) for sealing the inner cylinder (8) and the top of the core tube (801); a plurality of partitions (17) are uniformly distributed radially between the outer wall of the core tube (801) and the inner wall of the inner cylinder (8); the partitions (17) divide the interior of the inner cylinder (8) into a plurality of sealed placement chambers (28) for placing desiccant; the central angle of the placement chamber (28) is β; A preset number of adjacent placement chambers (28) are regeneration zones, and the remaining placement chambers (28) are drying zones; the center angle of the regeneration zone is α; an airflow tube (9) with a closed bottom is coaxially placed in the core tube (801); a first airflow chamber (24) is formed between the airflow tube (9) and the core tube (801); a second airflow chamber (25) is formed between the inner tube (8) and the outer tube (1); a first pipe partition (22) and a second pipe partition (27) are respectively provided in the airflow tube (9) along the edge direction of the center angle α of the regeneration zone; the first pipe partition (22) and the second pipe partition (27) divide the interior of the airflow tube (9) into a first tube cavity (901) and a second tube cavity (902) with a center angle α. The walls of the airflow tube (9) of the first tube cavity (901) and the second tube cavity (902) are uniformly distributed with a plurality of through-flow holes; the upper cover (7) is provided with a through-flow hole; the bottom of the first medium input tube (5) can be moved through the airflow hole to communicate with the first tube cavity (901); the bottom of the second medium input tube (6) can be moved through the airflow hole to communicate with the second tube cavity (902); the walls of the core tube (801) on the left and right sides of the partition (17) and the wall of the inner tube (8) are uniformly distributed with a plurality of through-flow holes; the combination of the first medium input tube (5), the second medium input tube (6) and the airflow tube (9) above the upper cover (7) is provided with a sealing plate (16); The top wall of the upper cover (7) on the periphery of the airflow tube hole is provided with a third sealing ring (15); the top wall of the third sealing ring (15) is fitted with the bottom wall of the sealing plate (16) for sealing the top of the first airflow chamber (24); the bottom outer wall of the airflow tube (9) is provided with an airflow tube convex ring (903); the air vent of the tube wall of the core tube (801) is located above the airflow tube convex ring (903); the outer wall of the airflow tube convex ring (903) is sleeved with a fourth sealing ring (23); the side surface of the fourth sealing ring (23) away from the airflow tube convex ring (903) is fitted with the inner wall of the core tube (801) for sealing the bottom of the first airflow chamber (24); the diameter of the upper cover (7) is larger than the diameter of the inner tube (8);The top wall of the outer cylinder (1) is provided with a first sealing ring (13); the top wall of the first sealing ring (13) is fitted with the bottom wall of the outer peripheral area of the upper cover (7) to close the top of the second air flow chamber (25); the bottom outer wall of the inner cylinder (8) is provided with an inner cylinder convex ring (804); the air vent of the cylinder wall of the inner cylinder (8) is located above the inner cylinder convex ring (804); the outer wall of the inner cylinder convex ring (804) is sleeved with a second sealing ring (14); the side surface of the second sealing ring (14) away from the inner cylinder convex ring (804) is fitted with the inner wall of the outer cylinder (1) to close the bottom of the second air flow chamber (25); the inner wall of the outer cylinder (1) is divided along the edge direction of the central angle α of the regeneration zone A first sealing strip (18) and a second sealing strip (19) are provided; the first sealing strip (18) and the second sealing strip (19) are in contact with the outer wall of the inner tube (8) on the side away from the outer tube (1); the first sealing strip (18) and the second sealing strip (19) separate the second airflow chamber (25) into a regeneration airflow output chamber and a drying airflow output chamber with a central angle α; the outer wall of the airflow tube (9) is provided with a third sealing strip (20) and a fourth sealing strip (21) along the edge direction of the central angle α of the regeneration zone; the third sealing strip (20) and the fourth sealing strip (21) are in contact with the inner wall of the core tube (801) on the side away from the airflow tube (9); the third sealing strip (20) and the fourth sealing strip (21) are in contact with the inner wall of the core tube (801) on the side away from the airflow tube (9); the third sealing strip (20) ), the fourth sealing strip (21) divides the first airflow chamber (24) into a regeneration airflow input chamber and a to-be-dried airflow input chamber with a central angle α; the outer cylinder (1) is provided with a second medium output pipe (4) communicating with the regeneration airflow output chamber and a first medium output pipe (3) communicating with the drying airflow output chamber; the first pipeline (33) is communicated with the inlet of the ejector (39); the first medium input pipe (5) is provided with a first pneumatic valve (29), and its end away from the first tube cavity (901) is communicated with the outlet of the ejector (39); the first medium input pipe (5) between the ejector (39) and the first tube cavity (901) is provided with a first cooler (40); The second medium output pipe (4) is provided with a fourth pneumatic valve (32); the end of the second medium output pipe (4) away from the outer cylinder (1) is connected to the adsorption port of the ejector (39); one end of the third pipe (35) is connected to the second pipe (34), and the other end is connected to the end of the first medium output pipe (3) away from the outer cylinder (1); the first medium output pipe (3) is provided with a third pneumatic valve (31); one end of the fourth pipe (36) is connected to the end of the second medium input pipe (6) away from the second tube cavity (902), and the other end is connected to the third pipe (35) through a sixth pipe (38); the second medium input pipe (6) is provided with a second pneumatic valve (30);The outer cylinder (1) is provided with a driving device for driving the inner cylinder (8) to rotate clockwise or counterclockwise by β° in a step-by-step manner when the first pneumatic valve (29), the second pneumatic valve (30), the third pneumatic valve (31) and the fourth pneumatic valve (32) are in a closed state; the areas on the left and right sides of the wall of the inner cylinder (8) close to the partition (17) are sealing areas (803); the air holes of the wall of the inner cylinder (8) are located on the wall of the inner cylinder (8) between adjacent sealing areas (803).

2. The zero-gas-consumption single-tower adsorption dryer according to claim 1, characterized in that: The sixth pipeline (38) is provided with a drying tower (42).

3. The zero-gas-consumption single-tower adsorption dryer according to claim 2, characterized in that: The sixth pipeline (38) is also provided with a fifth pneumatic valve (43).

4. The zero-gas-consumption single-tower adsorption dryer according to claim 3, characterized in that: A fifth pipe (37) is provided between the third pipe (35) and the fourth pipe (36); the fifth pipe (37) is provided with a second cooler (41).

5. The zero-gas-consumption single-tower adsorption dryer according to claim 4, characterized in that: The fifth pipeline (37) is also provided with a sixth pneumatic valve (44).

6. The zero-gas-consumption single-tower adsorption dryer according to claim 5, characterized in that: 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 a desiccant and a second placement chamber (806) for placing an adsorbent.

7. The zero-gas-consumption single-tower adsorption dryer according to claim 6, characterized in that: The upper cover (7) above the first storage chamber (805) is provided with a desiccant injection pipe (701) in communication therewith; the upper cover (7) above the second storage chamber (806) is provided with an adsorbent injection pipe (702) in communication therewith; and the tops of the desiccant injection pipe (701) and the adsorbent injection pipe (702) are both provided with sealing caps (26).

8. The zero-gas-consumption single-tower adsorption dryer according to claim 7, characterized in that: A top cover (2) is provided on 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); the 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 out of the top cover (2).

9. The zero-gas-consumption single-tower adsorption dryer according to claim 5, characterized in that: The driving device comprises a worm gear (12) arranged at the bottom of the inner cylinder (8) and a stepping motor (10) arranged at the outer cylinder (1); an output shaft of the motor (10) is provided with a worm (11); and the worm gear (12) and the worm (11) are meshingly connected.

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