Zero-gas-consumption single-tower adsorption type drying machine

Abstract

An adsorption tower of the zero-gas-consumption single-tower adsorption type drying machine comprises an outer cylinder and an inner cylinder rotatably arranged in the outer cylinder, a core pipe is arranged in the inner cylinder, the inner cylinder is divided into a plurality of containing chambers through partition plates, the containing chambers are used for containing drying agents, the adjacent containing chambers with the preset number are regeneration areas with the central angle being alpha, and the other containing chambers are drying areas. An airflow pipe is placed in the core pipe, and a first pipeline partition plate and a second pipeline partition plate which are arranged in the airflow pipe in the central angle alpha side line direction divide the interior of the airflow pipe into a first pipe cavity and a second pipe cavity with the central angle alpha. And a first sealing strip and a second sealing strip which are arranged along the side line direction of the central angle alpha divide the second airflow chamber into a regenerated airflow output chamber and a dry airflow output chamber with the central angle alpha. The first airflow chamber is divided into a regeneration airflow input chamber and a to-be-dried airflow input chamber with the central angle alpha by a third sealing strip and a fourth sealing strip which are arranged along the side line direction of the central angle alpha, so that the gas of the adsorption tower flows along the radial direction, the pressure drop is low, and the use cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of gas drying, and 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 reduce the dew point of the gas, the desiccant needs to be regenerated in time. Figure 1 The figure shows a schematic diagram of a zero-gas consumption single-tower adsorption dryer of the prior art, in which the adsorption tower 1' is divided into a drying zone and a regeneration zone. The adsorption tower 1' is driven to rotate by a driving device, and the desiccant in the drying zone is moved to the regeneration zone for regeneration; the regenerated desiccant is sent back to the drying zone for drying the hot and humid gas. The regeneration of the desiccant in the regeneration zone is usually performed by introducing the gas part that has been dried in the drying zone into the regeneration zone, and the dried dry gas 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, and 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 of 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 also be set in the system to improve the mixing process of the regeneration gas and the humid hot gas. The working principle of the ejector 3' is similar to that of the Venturi tube. The humid hot 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 inhale 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 the problem of relatively high use cost is still not solved. 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 that the adsorption tower of the prior art zero-gas consumption single-tower adsorption dryer adopts an axial gas flow mode and cannot effectively overcome the large pressure drop, resulting in high use costs, poor circulation of the overall system of the dryer, 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 pipeline for inputting wet air to be dried and a second pipeline for outputting dry air; further comprising an ejector, a third pipeline, a fourth pipeline, 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 tube with a closed bottom is coaxially arranged in the inner cylinder; an upper cover is arranged on the top of the inner cylinder for closing the inner cylinder and the top of the core tube; a plurality of partitions are uniformly distributed radially between the outer wall of the core tube and the inner wall of the inner cylinder; the partition divides the interior of the inner cylinder into a plurality of closed 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 center 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 arranged in the airflow tube along the edge direction of the center 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 center 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 movably pass through the airflow hole to communicate with the first tube cavity; the bottom of the second medium input tube can movably pass through the airflow hole The vents are connected to the second tube cavity through the airflow tube hole; the core tube walls on the left and right sides of the partition and the inner tube walls 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 airflow tube above the upper cover is provided with a sealing plate; the upper cover top wall at the periphery of the airflow 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, so as to close the top of the first airflow chamber; the outer wall of the bottom of the airflow tube is provided with an airflow tube convex ring; the air hole in the core tube wall is located above the airflow tube convex ring; the outer wall of the airflow tube convex ring is sleeved with a fourth sealing ring; the side of the fourth sealing ring away from the airflow tube convex ring is fitted with the inner wall of the core tube, so as to close the first The bottom of the airflow 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 outer peripheral area of ​​the upper cover, so as to close the top of the second airflow 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 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 close the bottom of the second airflow chamber; the inner wall of the outer cylinder is provided with a first sealing strip and a second sealing strip respectively along the edge line direction of the central angle α of the regeneration zone; the first sealing strip and the second sealing strip are in contact with the outer wall of the inner cylinder away from the side of the outer cylinder;The first sealing strip and the second sealing strip divide the second airflow chamber into a regeneration airflow output chamber and a drying airflow output chamber with a central angle α; the outer wall of the airflow tube is provided with a third sealing strip and a fourth sealing strip respectively along the edge line 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 airflow tube; the third sealing strip and the fourth sealing strip divide the first airflow chamber into a regeneration airflow input chamber and a to-be-dried airflow input chamber with a central angle α; the outer cylinder is provided with a second medium output pipe connected to the regeneration airflow output chamber and a first medium output pipe connected to the drying airflow output chamber; the first pipeline is connected to 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 connected to the injector outlet; 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 second medium output pipe is connected to the ejector adsorption port at one end away from the outer cylinder; one end of the third pipe is connected to the second pipe, and the other end is connected to the first medium output pipe at one end 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 second medium input pipe at one end 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 steppingly driving the inner cylinder to rotate clockwise or counterclockwise by β° when the first pneumatic valve, the second pneumatic valve, the third pneumatic valve and the fourth pneumatic valve are closed. ;

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

[0009] Preferably, the sixth pipeline is also 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 partition plates; 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 tube connected thereto; the upper cover above the second placement chamber is provided with an adsorbent injection tube connected thereto; and the tops of the desiccant injection tube and the adsorbent injection tube 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 airflow 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 sealing areas; and the air holes on the inner cylinder wall are located on the inner cylinder wall adjacent to the sealing areas.

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

[0018] The adsorption tower includes an outer cylinder, an inner cylinder can be rotatably arranged in the outer cylinder, a core tube is arranged in the inner cylinder, and a plurality of partitions are evenly distributed radially between the core tube and the inner cylinder. The partitions divide the inner cylinder into a plurality of placement chambers with a central angle of β for placing desiccant. The adjacent preset number of placement chambers are regeneration zones with a central angle of α, and the remaining placement chambers are drying zones. An airflow tube is placed in the core tube, and a first pipeline partition and a second pipeline partition are respectively arranged in the airflow tube along the edge direction of the central angle α of the regeneration zone. The first pipeline partition and the second pipeline partition divide the airflow tube into a first tube cavity and a second tube cavity with a central angle α. The wet air to be dried is input from the first tube cavity, and the regenerated dry air is input from the second tube cavity. The inner wall of the outer cylinder 1 is respectively provided with a first sealing strip and a second sealing strip along the edge direction of the central angle α of the regeneration zone. The first sealing strip and the second sealing strip divide the second airflow chamber into a regeneration airflow output chamber and a drying airflow output chamber with a central angle α. The outer wall of the airflow 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 divide the first airflow chamber into a regeneration airflow input chamber and an airflow input chamber to be dried with a central angle α. 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 arranged to drive the inner cylinder to rotate β°. Every time the inner cylinder rotates β°, that is, one placement chamber position, the placement chamber in the drying zone that is saturated with adsorption will be rotated to the regeneration zone to regenerate the desiccant. At the same time, the placement chamber in the regeneration zone that is regenerated 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 Fig.23 The schematic diagram of the adsorption tower of the prior art dryer is shown, hereinafter referred to as "axis". Fig.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 way; ρ is the velocity 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.

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

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

[0023] is a constant. In the above case, the difference between the axial flow and radial flow of gas is analyzed.

[0024] 1. From formula (1.1), we can know 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 know that the pressure drop caused by radial flow of gas 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, making it easy to commercialize. 径 The increase will also increase the volume of the placement chamber, which can effectively solve the possible reduction in drying capacity caused by the reduction in desiccant capacity when the axial direction changes to the radial direction.

[0032] At the same time, compared with the axial flow method in the prior art, the radial flow method of the present application greatly increases the contact area between the gas and the desiccant, and the contact time is shorter. 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] In order to more clearly explain 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 only exemplary, and for those of ordinary skill in the art, other drawings can be derived from the provided drawings without creative work.

[0035] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0036] Figure 1 It 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 It 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 an adsorption tower of a zero-gas-consumption single-tower adsorption dryer of the present invention;

[0041] Figure 6 The invention is an accessory of the zero gas consumption single tower adsorption dryer Figure 5 AA section view;

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

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

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

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

[0046] Fig.11 It is a structural schematic diagram of the inner cylinder of the zero-gas-consumption single-tower adsorption dryer of the present invention;

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

[0048] Fig.13 The invention is an accessory of the zero gas consumption single tower adsorption dryer Fig.12 FF section view;

[0049] Fig.14 It is a structural schematic diagram of the air flow pipe of the zero-gas-consumption single-tower adsorption dryer of the present invention;

[0050] Fig.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] Fig.16 The invention is an accessory of the zero gas consumption single tower adsorption dryer Fig.15 GG section view;

[0052] Fig.17 It is a diagram showing the assembly state of the inner cylinder and the air flow pipe of the zero-gas-consumption single-tower adsorption dryer of the present invention;

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

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

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

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

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

[0058] Fig.23 It is a principle schematic diagram of an adsorption tower of a zero-gas-consumption single-tower adsorption dryer in the prior art;

[0059] Fig.24 The 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 placement chamber; 806. Second placement 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 , the first sealing strip; 19, the second sealing strip; 20, the third sealing strip; 21, the fourth sealing strip; 22, the first pipeline partition; 23, the fourth sealing ring; 24, the first air flow chamber; 25, the second air flow chamber; 26, the sealing cap; 27, the second pipeline partition; 28, the placement chamber; 29, the first pneumatic valve; 30, the second pneumatic valve; 31, the third pneumatic valve; 32, the fourth pneumatic valve; 33, the first pipeline; 34, the second pipeline; 35, the third pipeline; 36, the fourth pipeline; 37, the fifth pipeline; 38, the sixth pipeline; 39, the ejector; 40, the first cooler; 41, the second cooler; 42, the drying tower; 43, the fifth pneumatic valve; 44, the sixth pneumatic valve. DETAILED DESCRIPTION

[0062] The present application is 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 special meanings in terms of technical connotations (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] The terms such as "upper", "lower", "left", "right", "middle", etc. used in this application are usually used to facilitate intuitive understanding by comparing with the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product. Without departing from the technical concept disclosed in this application, changes in these relative positional relationships should also be regarded as the scope of this application.

[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 pipeline 33 and a second pipeline 34 are provided. The first pipeline 33 is usually used to connect to an air compressor to input wet air to be dried, and the second pipeline 34 is used to output dry air after drying. An ejector 39, a third pipeline 35, a fourth pipeline 36, a first medium input pipe 5 and a second medium input pipe 6 are also provided. The adsorption tower includes an outer cylinder 1, and an inner cylinder 8 is rotatably arranged in the outer cylinder 1. A core tube 801 with a closed bottom is coaxially fixed in the inner cylinder 8. An upper cover 7 is installed on the top of the inner cylinder 8 to close the inner cylinder 8 and the top of the core tube 801. Multiple partitions 17 are evenly 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 multiple closed placement chambers 28 for placing desiccant, and the center angle of the placement chamber 28 is β; the adjacent preset number of placement chambers 28 are regeneration zones. The number of placement chambers in the regeneration zone of the embodiment of the present application is 2, and the remaining placement chambers 28 are drying zones, and the center angle of the regeneration zone is α. The 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, and a second airflow chamber 25 is formed between the inner tube 8 and the outer tube 1. The first pipe partition 22 and the second pipe partition 27 are respectively arranged in the airflow tube 9 along the edge direction of the central angle α of the regeneration zone. The first pipe partition 22 and the second pipe partition 27 divide the inside of the airflow tube 9 into a first tube cavity 901 and a second tube cavity 902, and the central angle of the second tube cavity 902 corresponds to α. The walls of the airflow tube 9 of the first tube cavity 901 and the second tube cavity 902 are evenly distributed with multiple through airflow holes. The upper cover 7 is provided with through airflow holes. The bottom of the first medium input tube 5 can be movably passed through the airflow hole to be fixedly connected to the airflow tube 9 and communicated with the first tube cavity 901; the bottom of the second medium input tube 6 can be movably passed through the airflow hole to be fixedly connected to the airflow tube 9 and communicated with the second tube cavity 902. The tube wall of the core tube 801 on the left and right sides of the partition 17 and the tube wall of the inner tube 8 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, and a third sealing ring 15 is fixedly provided on the top wall of the upper cover 7 at the periphery of 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, which is used to seal 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, and the air vent hole of the tube wall of the core tube 801 is located above the airflow pipe convex ring 903, and 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 is fitted with the inner wall of the core tube 801 to seal 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, and the first sealing ring 13 is fixedly arranged on the top wall of the outer tube 1, so that 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, so as to seal the top of the second airflow chamber 25; the outer wall of the bottom of the inner tube 8 is provided with an inner tube convex ring 804, and the air vent of the inner tube 8 wall is located above the inner tube convex ring 804. The second sealing ring 14 is sleeved on the outer wall of the inner tube convex ring 804, and the side of the second sealing ring 14 away from the inner tube convex ring 804 is fitted with the inner wall of the outer tube 1 to seal the bottom of the second airflow chamber 25. The inner wall of the outer tube 1 is fixed with a first sealing strip 18 and a second sealing strip 19 respectively along the edge line direction of the central angle α of the regeneration zone. The first sealing strip 18 and the second sealing strip 19 are fitted with the outer wall of the inner tube 8 away from the side of the outer tube 1. In this way, the first sealing strip 18 and the second sealing strip 19 divide the second airflow chamber 25 into a regeneration airflow output chamber and a drying airflow output chamber with a central angle α. The third sealing strip 20 and the fourth sealing strip 21 are fixedly arranged on the outer wall of the airflow tube 9 along the edge direction of the central angle α of the regeneration zone, so that 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. In this way, the third sealing strip 20 and the fourth sealing strip 21 divide 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 respectively provided with a second medium output pipe 4 connected to the regeneration airflow output chamber and a first medium output pipe 3 connected to the drying airflow output chamber. The first pipeline 33 is connected to the inlet of the ejector 39. A first pneumatic valve 29 is arranged on the first medium input pipe 5, and its end away from the first tube cavity 901 is connected to the outlet of the ejector 39. The first medium input pipe 5 between the ejector 39 and the first tube cavity 901 is installed 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 down the humid air input from the air compressor to remove a certain amount of moisture. The second medium output pipe 4 is provided with a fourth pneumatic valve 32, and the end of the second medium output pipe 4 away from the outer tube 1 is connected to the adsorption port of the ejector 39. One end of the third pipeline 35 is connected to the second pipeline 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 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 the 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 stepwise manner when 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 desiccant with saturated adsorption in the drying area is moved to the regeneration area for regeneration operation in turn, and the desiccant regenerated in the regeneration area is sent back to the drying area for drying operation.

[0066] Preferably, the sixth pipeline 38 introduces dried dry air to regenerate the desiccant in the regeneration zone. In order to further improve the dryness of the regenerated dry air, the sixth pipeline 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, after the regeneration operation is completed, the regeneration operation can be stopped. For this purpose, the sixth pipeline 38 is also 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 dry air is cooled by the second cooler 41 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, after the regeneration operation is completed, the regeneration operation can be stopped. For this purpose, a sixth pneumatic valve 44 is also 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 work together or separately. By further drying the regenerated dry air, the dryness of the desiccant is adjusted, and then the drying capacity of the dryer is adjusted to obtain different drying dew points, so that the dryer of the present application has stronger adaptability.

[0071] Optionally, in some applications, it is not only required to obtain dry gas, but also to filter impurities in the gas, which requires the use of adsorbents. For this purpose, 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 adsorbent. In this way, the humid air is dried by the desiccant and purified by the adsorbent at the same time.

[0072] Preferably, in order to facilitate the addition of desiccant and adsorbent, a desiccant injection pipe 701 connected thereto is fixedly provided on the upper cover 7 above the first placement chamber 805, and an adsorbent injection pipe 702 connected thereto is fixedly provided on the upper cover 7 above the second placement chamber 806, and a sealing cap 26 is provided on the top of the desiccant injection pipe 701 and the adsorbent injection pipe 702. When adding desiccant and adsorbent, the sealing cap 26 is opened, and desiccant can be added to the first placement chamber 805 through the desiccant injection pipe 701, and adsorbent can be added to the second placement chamber 806 through the adsorbent injection pipe 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, the 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 meshed and connected.

[0075] Preferably, when the stepper motor stops rotating and the drying area and the regeneration area perform corresponding operations, the first sealing strip 18, the second sealing strip 19 and the outer wall of the inner cylinder 8 are sealed in close contact with each other. To prevent possible gas leakage caused by the air holes in the wall of the inner cylinder 8, the wall of the inner cylinder 8 near the left and right sides of the partition 17 is a sealing area 803, and the air holes in 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 avoids the presence of air holes in the contact 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 airflow output chamber and the drying airflow output chamber.

[0076] Here’s how this application works:

[0077] like Fig. 22As shown, first, the intermittent time of the motor 10 is set to the time when the desiccant in the placement chamber 28 of the drying zone is saturated with adsorption (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 open the fifth pneumatic valve 43 at the same time. The wet air to be dried is input from the first pipeline 33, and after passing 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, 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, and then is collected from the air holes of the inner cylinder 8 to the dry air flow output of the second air flow chamber 25. chamber, flows out from the first medium output pipe 3, and is output from the second pipe 34 through the third pipe 35; the regenerated dry air is input 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, enters the regeneration airflow input chamber of the first airflow chamber 24 through the air flow holes of the airflow tube 9, enters the placement chamber 28 of the regeneration zone through the air permeable holes of the core tube 801, radially flows through the desiccant, the adsorption saturated desiccant is regenerated, and then is collected from the air permeable holes of the inner tube 8 to the regeneration airflow output chamber of the second airflow chamber 25, output from the second medium output pipe 4, and is sucked 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 way.

[0080] The above is a relatively specific and detailed description of the present application through general description and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, 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 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 comprises an ejector (39), a third pipeline (35), a fourth pipeline (36), a first medium input pipe (5) and a second medium input pipe (6); the adsorption tower comprises an outer cylinder (1); an inner cylinder (8) is rotatably arranged inside the outer cylinder (1); a core tube (801) with a closed bottom is coaxially arranged inside the inner cylinder (8); an upper cover (7) is arranged 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 (8) 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 desiccants; the center angle of the placement chambers (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 arranged 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 airflow holes; the upper cover (7) is provided with a through airflow hole; the bottom of the first medium input tube (5) can be movably passed through the airflow hole to communicate with the first tube cavity (901); the bottom of the second medium input tube (6) can be movably passed through the airflow hole to communicate with the second tube cavity (902); the tube walls of the core tube (801) on the left and right sides of the partition (17) and the tube wall of the inner tube (8) are uniformly distributed with a plurality of through air 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); A third sealing ring (15) is provided on the top wall of the upper cover (7) at the periphery of the airflow tube hole; the top wall of the third sealing ring (15) is fitted with the bottom wall of the sealing plate (16) to seal the top of the first airflow chamber (24); an airflow tube convex ring (903) is provided on the outer wall of the bottom of the airflow tube (9); the air vent of the tube wall of the core tube (801) is located above the airflow tube convex ring (903); a fourth sealing ring (23) is sleeved on the outer wall of the airflow tube convex ring (903); 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) to seal 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 in contact with the bottom wall of the outer peripheral area of ​​the upper cover (7) to seal the top of the second airflow 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 in contact with the inner wall of the outer cylinder (1) to seal the bottom of the second airflow chamber (25); the inner wall of the outer cylinder (1) is divided into a plurality of convex rings along the edge line direction of the central angle α of the regeneration zone. A first sealing strip (18) and a second sealing strip (19) are provided respectively; 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; a third sealing strip (20) and a fourth sealing strip (21) are provided respectively on the outer wall of the airflow tube (9) along the edge line 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) ), a 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 respectively provided with a second medium output pipe (4) connected to the regeneration airflow output chamber and a first medium output pipe (3) connected to the drying airflow output chamber; the first pipeline (33) is connected to 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 connected to 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 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 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. ; 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 pipeline (37) is provided between the third pipeline (35) and the fourth pipeline (36); the fifth pipeline (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 placement chamber (805) is provided with a desiccant injection pipe (701) connected thereto; the upper cover (7) above the second placement chamber (806) is provided with an adsorbent injection pipe (702) connected thereto; 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 first medium input pipe (5) and the second medium input pipe (6) have their ends away from the air flow pipe (9) passing through the top cover (2) and extending 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 turbine (12) arranged at the bottom of the inner cylinder (8) and a stepping motor (10) arranged at the outer cylinder (1); the output shaft of the motor (10) is provided with a worm (11); the turbine (12) and the worm (11) are meshingly connected.

10. The zero-gas-consumption single-tower adsorption dryer according to claim 5, characterized in that: 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 on the wall of the inner cylinder (8) are located on the wall of the inner cylinder (8) between adjacent sealing areas (803).

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