Radial flow adsorption tower applied to zero-gas-consumption double-tower adsorption type drying machine

Abstract

The utility model relates to a radial flow adsorption tower applied to a zero-gas-consumption double-tower adsorption type dryer, which comprises an adsorption tower body, a first airflow channel is arranged at the axis position of the adsorption tower body along the axial direction of the adsorption tower body, a first separation part is arranged on the periphery of the first airflow channel, and a first cavity is formed between the first separation part and the first airflow channel. And a second airflow channel is formed between the first separation part and the adsorption tower body, so that gas of the adsorption tower flows in the radial direction, and compared with the adsorption tower body in the prior art that gas flows in the axial direction, the problem of large pressure drop is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas drying, specifically relates to a radial flow adsorption tower applied to zero-gas-consumption double-tower adsorption dryer. BACKGROUND

[0002] Adsorption dryers are widely used in the drying of compressed gas. In order to reduce the dew point of the gas, the drying agent needs to be regenerated in time. In order to realize continuous production and improve the drying efficiency, a double-tower adsorption dryer is developed, as shown in the figure. The device is provided with two adsorption towers: a first adsorption tower 1' and a second adsorption tower 2'. By controlling the opening or closing of the first pneumatic valve 5' and the second pneumatic valve 6', the two adsorption towers can alternately perform drying and regeneration operations, thereby realizing cyclic operation. Figure 1

[0003] The regeneration of the adsorption tower is usually carried out through a regeneration pipeline 4', which introduces the drying gas processed by the adsorption tower during the drying operation into the adsorption tower that is being regenerated, thereby regenerating the drying agent therein. In order to optimize the gas recovery process after regeneration and realize zero gas consumption, the system controls the opening or closing of the third pneumatic valve 7' and the fourth pneumatic valve 8' to re-introduce the regenerated gas into the adsorption tower for drying operation, because the regenerated gas contains a large amount of moisture.

[0004] At present, the first adsorption tower 1' and the second adsorption tower 2' in the prior art both adopt an axial gas flow mode. When the gas passes through the drying agent, it will encounter significant resistance, resulting in a large pressure drop. In addition, the wet air produced by the air compressor has a relatively high pressure, while the pressure of the regenerated gas is relatively low. This pressure difference makes it difficult for the regenerated gas to effectively mix with the wet air from the air compressor and enter the adsorption tower for drying operation, thereby affecting the system cycle and reducing the regeneration efficiency of the drying agent and the overall performance of the dryer.

[0005] In order to reduce the resistance caused by the drying agent and reduce the pressure drop of the gas, a drying agent with a small resistance coefficient is usually selected, which however increases the use cost of the dryer. In order to further promote the mixing of the regenerated gas and the wet air, an ejector 3' is usually configured in the system. The working principle of the ejector 3' is similar to that of a Venturi tube. The wet air is injected at high speed through the ejector, generating negative pressure, thereby sucking in the regenerated gas and mixing the two to be sent into the adsorption tower for drying operation. Although in most cases the ejector 3' can effectively solve the problem of the integration of the regenerated gas, when the pressure of the wet air from the air compressor is low, the negative pressure generated by the ejector 3' is still not sufficient to completely suck in the regenerated gas, resulting in poor system circulation and thereby affecting the regeneration of the drying agent and the overall performance of the dryer. At the same time, the use of a drying agent with a small resistance coefficient still has the problem of high use cost, which has not been fundamentally solved.

[0006] ​Therefore, how to effectively solve the problem of large pressure drop caused by the axial gas flow mode of the first adsorption tower 1' and the second adsorption tower 2' has become a problem to be solved at present. Technical content

[0007] Therefore, the utility model provides a radial flow adsorption tower applied to zero-gas-consumption double-tower adsorption dryer, mainly solves the technical problem of large pressure drop caused by the axial gas flow mode of the adsorption tower applied to zero-gas-consumption double-tower adsorption dryer in the prior art.

[0008] In order to achieve the above object, the utility model provides the following technical scheme:

[0009] A radial flow adsorption tower applied to zero-gas-consumption double-tower adsorption dryer, including cylindrical adsorption tower body, the top of adsorption tower body is equipped with upper cover for closing its top, bottom is equipped with lower cover for closing its bottom, the tubular first gas flow channel is arranged along the axial direction of the adsorption tower body at the axial position of the adsorption tower body, the first gas flow channel is equipped with the cylindrical net first partition part in the adsorption tower body of the outer periphery, the first partition part is surrounded with the first gas flow channel, the upper cover and the lower cover and forms the first chamber for placing drying agent, the first partition part is surrounded with the inner wall of the adsorption tower body, the upper cover and the lower cover and forms the second gas flow channel, the first gas flow channel pipe wall is uniformly distributed with a plurality of first gas flow holes that are communicated with the first chamber, the upper cover is provided with a plurality of upper cover gas holes that are communicated with the second gas flow channel, the lower cover is provided with lower cover gas hole that is communicated with the first gas flow channel, the adsorption tower body is equipped with first gas flow pipe and second gas flow pipe, the first gas flow pipe is communicated with the second gas flow channel through the upper cover gas hole, the second gas flow pipe is communicated with the first gas flow channel through the lower cover gas hole.

[0010] Optionally, the second partition part is cylindrical net, and the second partition part is surrounded with the first partition part, the upper cover and the lower cover and forms the second chamber for placing adsorbent, and the second gas flow channel is a region surrounded by the second partition part, the inner wall of the adsorption tower body, the upper cover and the lower cover.

[0011] Optionally, the utility model also includes a gas collecting device arranged on the adsorption tower body, a plurality of upper cover gas holes are communicated with the gas collecting device, and the first gas flow pipe is communicated with the gas collecting device.

[0012] Optionally, the gas collecting device is an upper collection cover arranged on the top of the adsorption tower body, the upper collection cover bottom wall is provided with an upper collection groove, a plurality of upper cover gas hole orifices are located in the upper collection groove, and the first gas flow pipe bottom end penetrates through the upper collection cover and extends into the upper collection groove.

[0013] Preferably, the adsorption tower body bottom is provided with a lower collection cover; the lower collection cover top wall is provided with a lower collection groove; the lower cover air hole bottom is located in the lower collection groove; and the second airflow pipe top end penetrates through the lower collection cover and extends into the lower collection groove.

[0014] Optionally, the gas collecting device is a branch air pipe provided at the upper cover air hole orifice position of the upper cover and communicated with the upper cover air hole, and a plurality of branch air pipes are communicated with the first airflow pipe at the branch air pipe end away from the upper cover air hole.

[0015] The utility model has at least the following beneficial effects:

[0016] The utility model discloses a first airflow channel is arranged on the axis position of the adsorption tower body and extends along the axis of the adsorption tower body, and the first airflow channel outer periphery is equipped with the first separation part, and the first separation part and the first airflow channel form the first chamber, and the first separation part and the adsorption tower body form the second airflow channel, so that the gas flow direction of the first adsorption tower and the second adsorption tower of the application flows along the radial direction, compared with the axial flow mode of the gas of the prior art adsorption tower, as shown in the drawing, Figure 7 As shown in the principle schematic drawing of the prior art adsorption tower, hereinafter referred to as "axis", Figure 8 As shown in the principle schematic drawing of the prior art adsorption tower, hereinafter referred to as "axis",

[0017]

[0018] Wherein, Δp is the pressure drop of the gas through the pipeline, λ is the along-path friction coefficient, 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.

[0019] The along-path friction coefficient λ is related to the Reynolds number Re and the relative roughness of the pipe wall That is,

[0020] Under the same pipeline conditions, it can be assumed that λ is constant when the gas flows in the pipeline. In the above case, the difference between the axial flow and the radial flow of the gas is analyzed.

[0021] I. From formula (1.1), the pressure drop generated by the axial flow of the gas is:

[0022]

[0023] Wherein, H 轴 is the height of the adsorption tower, R 轴 is the radius of the adsorption tower when the gas flows axially. As can be seen, in the axial flow mode, to reduce the pressure drop, only H 轴 can be reduced, or R 轴 can be increased, which

[0024] This results in the actual product being flattened, increasing the floor space, and making it difficult to commercialize.

[0025] 2. From formula (1.1), we can see that the pressure drop caused by radial gas flow is:

[0026]

[0027] Further arrangement of formula (1.3) yields:

[0028]

[0029] Among them H 径 is the height of the adsorption tower; R1 is the outer diameter of the first air flow channel; R2 is the inner diameter of the second air flow channel. 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 first chamber and the second 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.

[0030] 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.

[0031] It can be seen that the radial flow adsorption tower used in the zero-gas-consumption double-tower adsorption dryer of the present application has the advantages of effectively reducing the pressure drop and improving the adsorption efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order 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.

[0033] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented. Any structural modifications, changes in proportions, or adjustments in sizes shall remain within the scope of the technical contents disclosed herein without affecting the efficacy and objectives of the present invention.

[0034] Figure 1 This is a structural diagram of a zero-gas-consumption double-tower adsorption dryer in the prior art;

[0035] Figure 2 This is a schematic structural diagram of a radial flow adsorption tower used in a zero-gas-consumption double-tower adsorption dryer according to the present invention;

[0036] Figure 3 This is an exploded view of a radial flow adsorption tower used in a zero-gas-consumption double-tower adsorption dryer according to the present invention;

[0037] Figure 4 This is a front view of a radial flow adsorption tower used in a zero-gas-consumption double-tower adsorption dryer according to the present invention;

[0038] Figure 5 This utility model is an accessory for a radial flow adsorption tower used in a zero gas consumption double tower adsorption dryer. Figure 4 AA section view;

[0039] Figure 6 This utility model is an accessory for a radial flow adsorption tower used in a zero gas consumption double tower adsorption dryer. Figure 4 BB cross-sectional view;

[0040] Figure 7 It is a schematic diagram of the principle of the adsorption tower of the prior art zero gas consumption double-tower adsorption dryer;

[0041] Figure 8 This is a schematic diagram of the principle of a radial flow adsorption tower used in a zero-gas-consumption double-tower adsorption dryer of the present application;

[0042] Description of reference numerals:

[0043] 1. Adsorption tower body; 2. First airflow pipe; 3. Second airflow pipe; 4. Upper collecting cover; 401. Upper collecting trough; 5. Lower collecting cover; 501. Lower collecting trough; 6. Upper cover; 601. Upper cover air hole; 7. Lower cover; 701. Lower cover air hole; 8. First airflow channel; 801. First airflow hole; 9. First partition; 10. Second partition; 11. First chamber; 12. Second chamber; 13. Second airflow channel. DETAILED DESCRIPTION

[0044] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0045] 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.).

[0046] 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.

[0047] The utility model is a radial flow adsorption tower used in a zero gas consumption double tower adsorption dryer, such as Figures 2 to 6 As shown, the adsorption tower comprises a cylindrical adsorption tower body 1, with an upper cover 6 at the top to seal the top and a lower cover 7 at the bottom to seal the bottom. A tubular first airflow channel 8 is provided axially along the center of the adsorption tower body 1. A cylindrical mesh-shaped first partition 9 is provided within the adsorption tower body 1, surrounding the first airflow channel 8. Thus, the first partition 9, the first airflow channel 8, the upper cover 6, and the lower cover 7 define a first chamber 11 for storing desiccant. The first partition 9, the inner wall of the adsorption tower body 1, the upper cover 6, and the lower cover 7 define a second airflow channel 13. The walls of the first airflow channel 8 are uniformly distributed with multiple first airflow holes 801 that communicate with the first chamber 11, allowing gas within the first airflow channel 8 to enter the first chamber 11 through the first airflow holes 801. The upper cover 6 defines multiple upper cover air holes 601 that communicate with the second airflow channel 13, while the lower cover 7 defines lower cover air holes 701 that communicate with the first airflow channel 8. The adsorption tower body 1 is equipped with a first airflow pipe 2 and a second airflow pipe 3. The first airflow tube 2 is connected to the second airflow channel 13 through the upper cover air holes 601; the second airflow tube 3 is connected to the first airflow channel 8 through the lower cover air holes 701. During use, gas enters the first airflow tube 2 and exits the second airflow tube 3, or enters the second airflow tube 3 and exits the first airflow tube 2. When entering the first airflow tube 2 and exiting the second airflow tube 3, the gas enters the second airflow channel 13 from the first airflow tube 2 through the upper cover air holes 601, then flows radially through the first chamber 11, enters the first airflow channel 8 through the first airflow holes 801, and then enters the second airflow tube 3 through the lower cover air holes 701 for exit. When entering the second airflow tube 3 and exiting the first airflow tube 2, the gas enters the first airflow channel 8 from the second airflow tube 3 through the lower cover air holes 701, then flows radially through the first chamber 11 into the second airflow channel 13 through the first airflow holes 801, and then enters the first airflow tube 2 through the upper cover air holes 601 for exit.

[0048] Optionally, in some applications, not only dry gas is required, but also impurities in the gas need to be filtered, which requires the use of adsorbents. Therefore, a cylindrical mesh second partition 10 is arranged in the adsorption tower body 1 outside the periphery of the first partition 9, and the second partition 10, the first partition 9, the upper cover 6 and the lower cover 7 form a second chamber 12 therebetween for placing adsorbents. In this way, the wet air is dried by the drying agent at the same time, and is also purified by the adsorbents. At this time, the second airflow passage 13 is the area surrounded by the second partition 10, the inner wall of the adsorption tower body 1, the upper cover 6 and the lower cover 7.

[0049] Optionally, in order to facilitate the gas to enter and exit the second airflow passage 13, a plurality of upper cover air holes 601 are arranged. In order to facilitate the plurality of upper cover air holes 601 to communicate with the first airflow pipe 2, a gas collecting device arranged in the adsorption tower body 1 is further included. The plurality of upper cover air holes 601 are in communication with the gas collecting device, and the first airflow pipe 2 is in communication with the gas collecting device.

[0050] In some specific applications, the gas collecting device is an upper collection cover 4 arranged at the top of the adsorption tower body 1. The upper collection cover 4 is provided with an upper collection groove 401 in the bottom wall, and the orifices of the plurality of upper cover air holes 601 are located in the upper collection groove 401. The first airflow pipe 2 passes through the upper collection cover 4 and extends into the upper collection groove 401.

[0051] At the same time, in order to make the overall appearance of the product beautiful, the adsorption tower body 1 is provided with a lower collection cover 5 at the bottom. The lower collection cover 5 is provided with a lower collection groove 501 in the top wall, and the orifices of the plurality of lower cover air holes 701 are located in the lower collection groove 501. The top end of the second airflow pipe 3 passes through the lower collection cover 5 and extends into the lower collection groove 501.

[0052] In some other specific applications, the gas collecting device is a branch air pipe (not marked in the drawing) arranged at the orifice position of the upper cover air hole 601 of the upper cover 6 and in communication with the upper cover air hole 601. The plurality of branch air pipes are in communication with the first airflow pipe 2 at the ends away from the upper cover air hole 601.

[0053] The above describes the present application in detail and in a specific manner through general description and specific embodiments. It should be understood that, based on the technical concept of the present application, some conventional adjustments or further innovations can also be made to these specific embodiments; however, as long as these conventional adjustments or further innovations do not deviate from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A radial flow adsorption tower for use in a zero-gas-consumption double-tower adsorption dryer, the adsorption tower comprising a cylindrical adsorption tower body (1); an upper cover (6) is provided on the top of the adsorption tower body (1) for sealing the top thereof, and a lower cover (7) is provided on the bottom thereof for sealing the bottom thereof, wherein: A tubular first airflow channel (8) is provided at the axis center of the adsorption tower body (1) along its axial direction; a cylindrical mesh first partition (9) is provided inside the adsorption tower body (1) at the outer periphery of the first airflow channel (8); the first partition (9) and the first airflow channel (8), the upper cover (6) and the lower cover (7) form a first chamber (11) for placing a desiccant; the first partition (9) and the inner wall of the adsorption tower body (1), the upper cover (6) and the lower cover (7) form a second airflow channel (13); a plurality of uniformly distributed desiccant-containing ... The first chamber (11) is connected to a first air flow hole (801); the upper cover (6) is provided with a plurality of upper cover air holes (601) connected to the second air flow channel (13); the lower cover (7) is provided with lower cover air holes (701) connected to the first air flow channel (8); the adsorption tower body (1) is provided with a first air flow tube (2) and a second air flow tube (3); the first air flow tube (2) is connected to the second air flow channel (13) through the upper cover air holes (601); the second air flow tube (3) is connected to the first air flow channel (8) through the lower cover air holes (701).

2. The radial flow adsorption tower used in the zero-gas-consumption double-tower adsorption dryer according to claim 1, characterized in that: A cylindrical mesh-shaped second partition (10) is provided inside the adsorption tower body (1) on the outer periphery of the first partition (9); the second partition (10), the first partition (9), the upper cover (6) and the lower cover (7) form a second chamber (12) for placing an adsorbent; the second air flow channel (13) is an area enclosed by the second partition (10), the inner wall of the adsorption tower body (1), the upper cover (6) and the lower cover (7).

3. A radial flow adsorption tower for use in a zero-gas-consumption double-tower adsorption dryer according to claim 1 or 2, characterized in that: It also includes a gas collecting device arranged on the adsorption tower body (1); the plurality of upper cover air holes (601) are all connected to the gas collecting device; and the first air flow pipe (2) is connected to the gas collecting device.

4. The radial flow adsorption tower used in a zero-gas-consumption double-tower adsorption dryer according to claim 3, characterized in that: The gas collecting device is an upper collecting cover (4) arranged on the top of the adsorption tower body (1); an upper collecting groove (401) is provided on the bottom wall of the upper collecting cover (4); the openings of the plurality of upper cover air holes (601) are all located in the upper collecting groove (401); the bottom end of the first air flow pipe (2) passes through the upper collecting cover (4) and extends into the upper collecting groove (401).

5. The radial flow adsorption tower used in a zero-gas-consumption double-tower adsorption dryer according to claim 4, characterized in that: A lower collecting cover (5) is provided at the bottom of the adsorption tower body (1); a lower collecting groove (501) is provided on the top wall of the lower collecting cover (5); the bottom of the air hole (701) of the lower cover is located in the lower collecting groove (501); the top end of the second air flow pipe (3) passes through the lower collecting cover (5) and extends into the lower collecting groove (501).

6. The radial flow adsorption tower used in a zero-gas-consumption double-tower adsorption dryer according to claim 3, characterized in that: The gas collecting device is a bronchial tube connected to the upper cover air hole (601) and arranged at the opening position of the upper cover air hole (601) of the upper cover (6), and the ends of the multiple bronchi away from the upper cover air hole (601) are all connected to the first air flow pipe (2).

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