A gas flow distributor for an adsorption column

Abstract

The utility model relates to adsorption tower technical field, and disclose a kind of airflow distributor for adsorption tower, including adsorption tower body and the upper fixed plate and lower fixed plate located in adsorption tower body inside, the upper fixed plate and lower fixed plate are all welded and installed in the upper and lower ends inside adsorption tower body, the upper and lower ends of adsorption tower body are respectively provided with compressed air outlet and compressed air inlet;The airflow distributor for adsorption tower adopts outer, inner double-layer diffusion structure, can ladder type evenly dispersed airflow, prevent tunnel effect and drying agent boiling abrasion, adapt large tower diameter and reduce resistance, diffuser extends into tower can reduce airflow velocity, prolong gas-solid contact time to improve drying efficiency, when regenerating, top gas collection unit is consistent with inner diffusion structure, can guarantee regenerative airflow uniform, while Y type support strip and 120 ° support rod enhance impact resistance, 304 steel is corrosion resistant, inlet and outlet air filter screen block adsorbent particle, bolt connection is convenient to disassemble and maintain.

Description

Technical Field

[0001] This utility model relates to the field of adsorption tower technology, specifically to an airflow distributor for adsorption towers. Background Technology

[0002] Adsorption towers are core equipment for separating and purifying substances based on the principle of adsorption. They are widely used in environmental protection, chemical industry, and pharmaceutical fields. The main body is usually a cylindrical, sealed container. Key internal components include an adsorbent layer, a fluid distribution device, and a regeneration system. The adsorbent is the core component; common types of adsorbents adsorb organic pollutants, while molecular sieves are suitable for gas dehydration and separation. Different types of adsorbents target different substances. Its working process consists of two stages: adsorption and regeneration. In the adsorption stage, the gas or liquid fluid to be treated passes through the adsorbent layer, and the target substance is selectively captured. The purified fluid is discharged from the top of the tower. When the adsorbent reaches saturation, the regeneration stage begins. The adsorbed substance is removed by heating, depressurization, or the introduction of a desorbent, restoring the adsorbent's activity for recycling. Due to its high separation efficiency, simple operation, and low energy consumption, this equipment has become an important device for removing heavy metals in water treatment and treating VOCs (volatile organic compounds) in waste gas purification.

[0003] Current adsorption tower airflow distribution schemes have significant shortcomings. Most adopt a single-layer diffusion structure, which makes it difficult for the airflow to be evenly distributed across the cross-section of the tower when adapted to large-diameter equipment. This easily leads to the tunneling effect. Furthermore, the diffusers often do not extend into the tower, resulting in high airflow velocity and short gas-solid contact time, making it difficult to meet the dew point temperature requirements. In the regeneration stage, there is a lack of a symmetrical airflow distribution structure that matches the adsorption stage. The regeneration airflow tends to concentrate at the top, and the adsorbent at the bottom is often not fully regenerated. It quickly becomes saturated after entering the next cycle, leading to an increase in the outlet dew point and creating a vicious cycle. Meanwhile, the existing diffuser support structure has weak impact resistance and is prone to deformation. Some are made of ordinary carbon steel, which is prone to corrosion, thus limiting the equipment's lifespan. The inlet and outlet filters are not adequately protected or are made of poor-quality materials, causing the adsorbent to be easily lost with the airflow, increasing consumable costs and reducing drying efficiency. Diffusers are mostly welded to fixed plates, making disassembly and maintenance inconvenient. The tower body size is not properly matched, causing the flow rate to deviate from the optimal range. Furthermore, it is not designed for the special working conditions of the bottom adsorbent, making it prone to oversaturation during adsorption and "non-penetration" during regeneration, thus affecting the overall drying capacity. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides an airflow distributor for an adsorption tower to solve the problems mentioned in the background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an airflow distributor for an adsorption tower, comprising an adsorption tower body, and an upper fixed plate and a lower fixed plate located inside the adsorption tower body. The upper and lower fixed plates are welded to the upper and lower ends inside the adsorption tower body. The upper and lower ends of the adsorption tower body are respectively provided with a compressed air outlet and a compressed air inlet. The side of the lower fixed plate facing the compressed air inlet is provided with an inner diffusion unit and an outer diffusion unit from the inside to the outside. The inner diffusion unit is welded to the lower inner fixed plate. The end of the upper fixed plate facing the compressed air outlet is provided with a top gas collecting unit. The outer side of the adsorption tower body is also provided with a support column, a safety valve interface, a packing port, and lifting lugs. The support column is fixedly installed on the lower part of the outer side of the adsorption tower body, and the lifting lugs are fixedly installed on the upper part of the outer side of the adsorption tower body.

[0006] Preferably, the external diffusion unit includes a connecting plate, on the side of the connecting plate facing the compressed air inlet, an external cylindrical diffuser is welded and installed, a support strip is welded and connected to the opening inside the external cylindrical diffuser, and a plurality of diffusion holes arranged in a ring are opened on the outer side of the external cylindrical diffuser, the diameter of the diffusion holes being 5mm to 8mm.

[0007] Through the above technical solution, the connecting plate provides a stable mounting base for the outer cylindrical diffuser. The annular diffusion hole on the outer side of the outer cylindrical diffuser can initially divert the incoming compressed air, so that the airflow is evenly diffused along the annular direction. The support bar can enhance the structural strength of the opening of the outer cylindrical diffuser, avoid deformation caused by airflow impact, and ensure the distribution stability of the diffusion hole.

[0008] Preferably, the connecting plate and the outer cylindrical diffuser are each provided with eight in a ring, the included angle between two adjacent outer cylindrical diffusers is 45°, the connecting plate and the lower fixing plate are fixedly installed by bolts, the outer cylindrical diffuser and the lower fixing plate are connected by plug-in, the outer cylindrical diffuser passes through the lower fixing plate and extends into the interior of the adsorption tower body, the outer cylindrical diffuser and the connecting plate are both made of stainless steel, and the cross-section of the first support bar is Y-shaped.

[0009] Through the above technical solution, eight outer cylindrical diffusers arranged in a ring at a 45° angle, together with the outer ring diffusion holes, enable the compressed air entering from the compressed air inlet to achieve 360° all-round uniform diffusion, avoiding local airflow concentration. The outer cylindrical diffusers are connected to the lower fixed plate by plug-in connection and fixed by connecting disc bolts. Compared with the traditional welded structure, it is more convenient to disassemble and replace the diffusers later, reducing maintenance costs. The use of stainless steel can improve the corrosion resistance of the diffusers and extend the service life of the equipment. The Y-shaped support bar can enhance the internal structural stability of the outer cylindrical diffuser without obstructing the airflow. At the same time, the outer cylindrical diffuser extends into the tower body, which can effectively reduce the airflow velocity and increase the contact time between the compressed air and the adsorbent. This avoids the tunnel effect and prevents the desiccant from boiling and abrading, reducing the pressure loss of the tower body.

[0010] Preferably, the inner diffusion unit includes an inner cylindrical diffuser, which is welded to the lower inner fixed plate. The outer side of the inner cylindrical diffuser has several diffuser holes arranged in a ring. A support strip is welded to the opening inside the inner cylindrical diffuser, and a support rod is welded between the support strip and the bottom inside the inner cylindrical diffuser. The inner cylindrical diffuser, the support strip, and the support rod are all made of 304 stainless steel, and the diameter of the diffuser holes is 3mm to 5mm.

[0011] Through the above technical solution, the inner cylindrical diffuser is fixed to the lower inner fixed plate by welding to ensure structural stability. The second annular diffusion hole on its outer side can perform secondary uniform dispersion of the airflow that has been initially treated by the outer diffusion unit. The combination of the second support bar and the support rod can enhance the overall rigidity of the inner cylindrical diffuser, resist the impact of airflow, and ensure the effective diffusion effect of the second diffusion hole.

[0012] Preferably, the cross-section of the second support bar is also Y-shaped, the number of the support rods is three times that of the second support bar, and the three support rods are distributed at a 120° angle around the vertical axis of the second support bar.

[0013] Through the above technical solution, the Y-shaped support bar can effectively disperse the airflow impact force at the opening of the inner cylindrical diffuser. Combined with the support rods distributed at a 120° angle, a multi-directional support structure is formed, which greatly improves the deformation resistance of the inner cylindrical diffuser, ensures that it maintains structural integrity under long-term airflow impact, and guarantees the uniform distribution of the second diffuser hole.

[0014] Preferably, ten inner cylindrical diffusers are arranged in a ring around the axis of the lower inner fixed plate. The inner cylindrical diffusers are arranged in a ring around the axis of the lower inner fixed plate. The two adjacent inner cylindrical diffusers are at an angle of 36°. The inner cylindrical diffusers penetrate the lower inner fixed plate and extend into the interior of the adsorption tower body.

[0015] Through the above technical solution, the inner diffusion unit and the outer diffusion unit form a double-layer diffusion structure. Multiple inner cylindrical diffusers are distributed in a ring at a 36° angle. Through the second ring diffusion hole on the outer side, the airflow initially diffused by the outer diffusion unit is uniformly dispersed again, further ensuring the uniformity of the compressed airflow across the cross-section of the adsorption tower body. This is especially suitable for large-diameter tower equipment and eliminates the airflow "tunneling" phenomenon. The Y-shaped support bar and the support rods distributed at a 120° angle can significantly enhance the structural strength of the inner cylindrical diffuser, resist the deformation caused by airflow impact, and ensure long-term stable operation. The inner cylindrical diffuser extends into the tower body and is welded and fixed to the lower inner fixed plate, which can further reduce the airflow velocity, ensure that the compressed air and the adsorbent in the tower are in full contact, meet the specified dew point temperature requirements, and improve drying efficiency.

[0016] Preferably, the adsorption tower body contains an adsorbent, and both the compressed air outlet and the compressed air inlet are equipped with stainless steel filters.

[0017] Through the above technical solution, the adsorbent placed inside the tower can directly contact the diffused compressed air to achieve water vapor adsorption. The stainless steel filter screens at the compressed air outlet and inlet openings can effectively intercept adsorbent particles inside the tower, preventing the adsorbent from being lost from the inlet and outlet with the airflow, ensuring the stability of the total amount of adsorbent, and avoiding the decrease in drying effect due to adsorbent loss. On the other hand, the filter screens can play a preliminary sorting role in the airflow entering and leaving the tower, helping the airflow to enter or leave the adsorption bed evenly, reducing the impact of local airflow turbulence on the adsorption or regeneration process, and further ensuring the drying efficiency and operational stability of the adsorption tower.

[0018] Preferably, the lower inner fixing plate and the upper inner fixing plate have the same size, and the lower inner fixing plate and the upper inner fixing plate are symmetrically distributed about the horizontal axis of the adsorption tower body. The internal diffusion unit and the top gas collection unit have the same structure, and the upper inner fixing plate and the upper fixing plate are fixedly installed by bolts.

[0019] Through the above technical solution, the symmetrical distribution of the lower inner fixed plate and the upper inner fixed plate, together with the internal diffusion unit and the top gas collecting unit with the same structure, forms a symmetrical airflow distribution structure at the upper and lower ends of the adsorption tower. In the adsorption stage, compressed air is evenly diffused from the bottom through the inner and outer diffusion units and then comes into contact with the adsorbent. In the regeneration stage, dry compressed air is evenly dispersed from the top through the top gas collecting unit and then permeates downwards, ensuring that the regeneration airflow can act evenly on the adsorbent in the tower and avoid insufficient regeneration of the adsorbent at the bottom due to uneven airflow. At the same time, the upper inner fixed plate and the upper fixed plate are fixed with bolts, which facilitates disassembly and maintenance in the later stage, makes it easy to inspect or replace the top gas collecting unit, reduces maintenance difficulty, and the symmetrical structure can make the tower body more evenly stressed, improving the overall structural stability of the equipment.

[0020] Compared with the prior art, this utility model provides an airflow distributor for adsorption towers, which has the following advantages: 1. This airflow distributor for adsorption towers features a double-layer diffusion structure consisting of an outer diffusion unit and an inner diffusion unit. This structure achieves a stepped and uniform dispersion of the airflow. The outer diffusion unit uses eight 304 stainless steel outer cylindrical diffusers arranged in a ring at a 45° angle, along with an outer ring diffusion hole one, to perform 360° preliminary uniform diffusion of the incoming airflow, avoiding localized airflow concentration. The inner diffusion unit uses ten inner cylindrical diffusers arranged in a ring at a 36° angle, which further disperse the airflow after preliminary diffusion through an ring diffusion hole two, forming a synergistic effect of double-layer diffusion. This design not only adapts to large-diameter adsorption tower equipment but also ensures the uniformity of compressed air across the entire cross-section of the tower body, eliminating the airflow tunnel effect. At the same time, it avoids boiling abrasion of the desiccant caused by concentrated airflow, reducing tower resistance and pressure loss. 2. The airflow distributor used in the adsorption tower has diffusers in both the external and internal diffusion units extending into the interior of the adsorption tower. This effectively reduces the airflow velocity, prolongs the contact time between the compressed air and the adsorbent inside the tower, ensures sufficient contact between the airflow and the adsorbent, efficiently adsorbs water vapor, meets the specified dew point temperature requirements, and significantly improves drying efficiency. On the other hand, the lower and upper internal fixed plates are symmetrically distributed about the horizontal axis of the tower body, and the top gas collecting unit has the same structure as the internal diffusion unit. During the regeneration stage, the drying compressed air can enter from the outlet in reverse, be evenly dispersed by the top gas collecting unit, and then penetrate downwards. This ensures that the regeneration airflow acts evenly on the adsorbent throughout the tower, avoids insufficient regeneration of the adsorbent at the bottom due to uneven airflow, ensures the effectiveness of adsorbent recycling, and maintains the long-term stable drying capacity of the equipment. 3. The airflow distributor used in the adsorption tower, with its Y-shaped support bar 1 of the outer diffusion unit, Y-shaped support bar 2 of the inner diffusion unit, and support rods distributed at a 120° angle, can significantly enhance the diffuser's resistance to airflow impact, prevent structural deformation caused by airflow impact, and ensure long-term stable operation. The outer diffusion unit is made of 304 stainless steel, which improves corrosion resistance and adapts to complex working conditions. At the same time, stainless steel filters are installed at both the compressed air inlet and outlet, which can not only intercept adsorbent particles and prevent adsorbent loss with the airflow, ensuring a stable total amount of adsorbent and preventing a decrease in drying effect due to adsorbent loss, but also initially regulate the inlet and outlet airflow, reducing the impact of local airflow turbulence on the adsorption or regeneration process, further improving the equipment's operational stability, and extending the maintenance cycle and overall service life. 4. The airflow distributor used in the adsorption tower has the connecting plate of the outer diffuser unit fixed to the lower fixed plate by bolts. Compared with the traditional welded structure, it can easily disassemble and replace the diffuser, reducing maintenance time. The upper inner fixed plate is also connected to the upper fixed plate by bolts, which facilitates later inspection or replacement of the top gas collection unit and reduces the difficulty of maintenance operation. In addition, the adsorbent loss is effectively controlled by the filter screen, reducing the frequency of adsorbent replenishment. Combined with the corrosion resistance of 304 stainless steel and the deformation resistance of the support structure, it can significantly reduce the maintenance cost and consumable cost of the equipment throughout its entire life cycle. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the half-section structure of this utility model; Figure 3 This is a schematic diagram of the installation structure of the top gas collection unit of this utility model; Figure 4 Schematic diagram of the installation structure of the outer diffusion unit and the inner diffusion unit of this utility model Figure 1 ; Figure 5 Schematic diagram of the installation structure of the outer diffusion unit and the inner diffusion unit of this utility model Figure 2 ; Figure 6 This is a schematic diagram of the distribution structure of the outer diffusion unit and the inner diffusion unit of this utility model; Figure 7 This is a schematic diagram of the mounting structure of the inner diffusion unit and the lower inner fixing plate of this utility model. Figure 1 ; Figure 8 This is a schematic diagram of the mounting structure of the inner diffusion unit and the lower inner fixing plate of this utility model. Figure 2 ; Figure 9 This is a schematic diagram of the installation structure of the top gas collection unit and the upper inner fixing plate of this utility model; Figure 10 This is a schematic diagram of the three-dimensional structure of the external diffusion unit of this utility model; Figure 11 This is a schematic diagram of the three-dimensional structure of the internal diffusion unit of this utility model; Figure 12 This is a schematic diagram of a half-section of the internal diffusion unit of this utility model.

[0022] The components are as follows: 1. Adsorption tower body; 2. Compressed air inlet; 3. Compressed air outlet; 4. Lower fixed plate; 5. Lower inner fixed plate; 6. External diffusion unit; 601. Connecting plate; 602. External cylindrical diffuser; 603. Support bar one; 604. Diffusion hole one; 7. Internal diffusion unit; 701. Internal cylindrical diffuser; 702. Diffusion hole two; 703. Support bar two; 704. Support rod; 8. Upper fixed plate; 9. Upper inner fixed plate; 10. Top gas collection unit; 11. Support column; 12. Safety valve interface; 13. Packing port; 14. Lifting lug. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: like Figure 1-12 As shown, the present invention provides an airflow distributor for an adsorption tower, including an adsorption tower body 1, and an upper fixing plate 8 and a lower fixing plate 4 located inside the adsorption tower body 1. The upper fixing plate 8 and the lower fixing plate 4 are welded to the upper and lower ends inside the adsorption tower body 1. The upper and lower ends of the adsorption tower body 1 are respectively provided with a compressed air outlet 3 and a compressed air inlet 2. The side of the lower fixing plate 4 facing the compressed air inlet 2 is provided with an inner diffusion unit 7 and an outer diffusion unit 6 from the inside to the outside. The inner diffusion unit 7 is welded to the lower inner fixing plate 5. The upper fixing plate 8 is provided with a top gas collecting unit 10 at the end facing the compressed air outlet 3. The outer side of the adsorption tower body 1 is also provided with a support column 11, a safety valve interface 12, a packing port 13 and a lifting lug 14. The support column 11 is fixedly installed on the lower part of the outer side of the adsorption tower body 1, and the lifting lug 14 is fixedly installed on the upper part of the outer side of the adsorption tower body 1.

[0025] Example 2: like Figure 2-12 As shown, as an improvement to the previous embodiment, in order to achieve uniform diffusion in all directions and avoid local airflow concentration.

[0026] Specifically, the external diffuser unit 6 includes a connecting plate 601. An outer cylindrical diffuser 602 is welded to the side of the connecting plate 601 facing the compressed air inlet 2. A support strip 603 is welded to the opening inside the outer cylindrical diffuser 602. Several annularly distributed diffusion holes 604 are formed on the outer side of the outer cylindrical diffuser 602, with a diameter of 5mm to 8mm. The advantages are that the connecting plate 601 provides a stable mounting base for the outer cylindrical diffuser 602, the annular diffusion holes 604 on the outer side of the outer cylindrical diffuser 602 can initially divert the incoming compressed air, causing the airflow to diffuse evenly along the annular direction, and the support strip 603 can enhance the structural strength of the opening of the outer cylindrical diffuser 602, preventing deformation caused by airflow impact and ensuring the stability of the diffusion hole distribution 604.

[0027] Specifically, the connecting plate 601 and the outer cylindrical diffuser 602 are each provided with eight in a ring. The included angle between two adjacent outer cylindrical diffusers 602 is 45°. The connecting plate 601 and the lower fixing plate 4 are fixedly installed by bolts. The outer cylindrical diffuser 602 and the lower fixing plate 4 are connected by plug-in connection. The outer cylindrical diffuser 602 passes through the lower fixing plate 4 and extends into the interior of the adsorption tower body 1. The outer cylindrical diffuser 602 and the connecting plate 601 are both made of stainless steel. The cross-section of the support bar 603 is Y-shaped. The advantages are that the eight outer cylindrical diffusers 602 arranged in a ring at a 45° angle, together with the annular diffusion holes 604 on their outer sides, can achieve 360° all-round uniform diffusion of compressed air entering from the compressed air inlet 2, avoiding local airflow concentration. The outer cylindrical diffusers 602 are connected to the lower fixed plate 4 by plug-in connection and fixed by bolts through the connecting plate 601. Compared with the traditional welded structure, it is more convenient to disassemble and replace the diffusers in the later stage, reducing maintenance costs. The use of stainless steel can improve the corrosion resistance of the diffusers and extend the service life of the equipment. The Y-shaped support bar 603 can enhance the internal structural stability of the outer cylindrical diffuser 602 without obstructing the airflow. At the same time, the outer cylindrical diffuser 602 extends into the tower body, which can effectively reduce the airflow velocity and increase the contact time between the compressed air and the adsorbent, thus avoiding the tunnel effect and preventing the desiccant boiling abrasion, reducing the pressure loss of the tower body.

[0028] Example 3: like Figure 2-12 As shown, as an improvement on the previous embodiment, in order to achieve double-layer diffusion.

[0029] Specifically, the inner diffusion unit 7 includes an inner cylindrical diffuser 701, which is welded to the lower inner fixed plate 5. The outer side of the inner cylindrical diffuser 701 is provided with several diffuser holes 702 arranged in a ring. A support bar 703 is welded and installed at the opening inside the inner cylindrical diffuser 701. A support rod 704 is welded and installed between the support bar 703 and the bottom inside the inner cylindrical diffuser 701. The inner cylindrical diffuser 701, the support bar 703 and the support rod 704 are all made of 304 stainless steel. The diameter of the diffuser holes 702 is 3mm to 5mm. The advantages are that the inner cylindrical diffuser 701 is fixed to the lower inner fixed plate 5 by welding, ensuring the structural stability. The second annular diffusion hole 702 on its outer side can perform secondary uniform dispersion of the airflow that has been initially treated by the outer diffusion unit 6. The combination of the second support bar 703 and the support rod 704 can enhance the overall rigidity of the inner cylindrical diffuser 701, resist the impact of airflow, and ensure the effective diffusion effect of the second diffusion hole 702.

[0030] Specifically, the cross-section of support bar 703 is also Y-shaped, and the number of support rods 704 is three times that of support bar 703. The three support rods 704 are distributed at a 120° angle around the vertical axis of support bar 703. The advantage is that the Y-shaped support bar 703 can effectively disperse the airflow impact force at the opening of the inner cylindrical diffuser 701. Combined with the support rods 704 distributed at a 120° angle, it forms a multi-directional support structure, significantly improving the deformation resistance of the inner cylindrical diffuser 701, ensuring its structural integrity under long-term airflow impact, and guaranteeing the uniform distribution of the diffuser holes 702.

[0031] Specifically, ten inner cylindrical diffusers 701 are arranged in a ring. The inner cylindrical diffusers 701 are arranged in a ring around the axis of the lower inner fixed plate 5. The two adjacent inner cylindrical diffusers 701 are at an angle of 36°. The inner cylindrical diffusers 701 penetrate the lower inner fixed plate 5 and extend into the interior of the adsorption tower body 1. The advantages are that the inner diffusion unit 7 and the outer diffusion unit 6 form a double-layer diffusion structure. Multiple inner cylindrical diffusers 701, arranged in a ring at a 36° angle, further uniformly disperse the airflow initially diffused by the outer diffusion unit 6 through the outer ring diffusion holes 702, ensuring the uniformity of compressed airflow across the cross-section of the adsorption tower body 1. This is especially suitable for large-diameter equipment, eliminating the "tunneling" phenomenon of airflow. The Y-shaped support bar 703, in conjunction with the support rods 704 arranged at a 120° angle, can significantly enhance the structural strength of the inner cylindrical diffuser 701, resisting deformation caused by airflow impact and ensuring long-term stable operation. The inner cylindrical diffuser 701 extends into the tower body and is welded and fixed to the lower inner fixed plate 5, which can further reduce the airflow velocity, ensuring full contact between the compressed air and the adsorbent in the tower, meeting the specified dew point temperature requirements, and improving drying efficiency.

[0032] Example 4: like Figure 2-12 As shown, as an improvement to the previous embodiment, in order to avoid a decrease in drying effect due to adsorbent loss.

[0033] Specifically, the adsorbent is placed inside the adsorption tower body 1, and stainless steel filters are installed at the openings of the compressed air outlet 3 and the compressed air inlet 2. The advantages are that the adsorbent placed inside the tower can directly contact the diffused compressed air to achieve water vapor adsorption. The stainless steel filters at the compressed air outlet 3 and inlet openings effectively intercept adsorbent particles within the tower, preventing adsorbent loss with the airflow from the inlet and outlet, ensuring a stable total amount of adsorbent, and avoiding a decrease in drying efficiency due to adsorbent loss. Furthermore, the filters can initially regulate the airflow entering and exiting the tower, assisting in the uniform entry and exit of the airflow into or out of the adsorption bed, reducing the impact of localized airflow turbulence on the adsorption or regeneration process, and further ensuring the drying efficiency and operational stability of the adsorption tower.

[0034] Example 5: like Figure 2-12 As shown, as an improvement to the previous embodiment, in order to ensure that the regeneration gas flow can act uniformly on the adsorbent in the tower.

[0035] Specifically, the lower inner fixed plate 5 and the upper inner fixed plate 9 have the same dimensions and are symmetrically distributed about the transverse axis of the adsorption tower body 1. The inner diffusion unit 7 and the top gas collecting unit 10 have the same structure, and the upper inner fixed plate 9 and the upper fixed plate 8 are fixed together by bolts. The advantages are that the symmetrical distribution of the lower inner fixed plate 5 and the upper inner fixed plate 9, combined with the identical structure of the inner diffusion unit 7 and the top gas collecting unit 10, creates a symmetrical airflow distribution structure at both ends of the adsorption tower body 1. During the adsorption stage, compressed air diffuses evenly from the bottom through the inner and outer diffusion units 6 and then contacts the adsorbent. During the regeneration stage, dry compressed air diffuses evenly from the top through the top gas collecting unit 10 and then permeates downwards, ensuring that the regeneration airflow acts evenly on the adsorbent inside the tower, avoiding insufficient regeneration of the adsorbent at the bottom due to uneven airflow. Furthermore, the bolted fixing of the upper inner fixed plate 9 and the upper fixed plate 8 facilitates later disassembly and maintenance, making it easier to inspect or replace the top gas collecting unit 10, reducing maintenance difficulty. The symmetrical structure also ensures more balanced stress on the tower body, improving the overall structural stability of the equipment.

[0036] Working Principle: During operation, compressed air first enters through the compressed air inlet 2 of the adsorption tower body 1. The stainless steel filter at the inlet first intercepts impurities and initially organizes the airflow. Then, the airflow first contacts the outer diffusion unit 6 on the lower fixed plate 4, passing through eight outer cylindrical diffusers 602 arranged in a ring at a 45° angle. The airflow then undergoes initial 360° uniform diffusion through the outer annular diffusion holes 604. Simultaneously, the outer cylindrical diffusers 602 extend into the tower body to reduce the airflow velocity. The Y-shaped support bar 603 ensures the stability of the diffuser structure. Next, the airflow enters the inner diffusion unit 7. Multiple inner cylindrical diffusers 701 arranged in a ring at a 36° angle undergo secondary diffusion through the outer annular diffusion holes 702, forming a double-layer diffusion structure. This completely avoids localized airflow concentration and tunneling effects. The Y-shaped support bar 703 and the outer annular diffusion holes 602 further enhance the airflow. The support rods 704, distributed at a 120° angle, ensure that the internal diffuser is resistant to airflow impact and operates stably. The uniformly diffused airflow makes full contact with the adsorbent inside the tower, and the adsorbent adsorbs water vapor in the airflow to achieve drying. The symmetrical distribution of the lower inner fixed plate 5 and the upper inner fixed plate 9, together with the top gas collecting unit 10, which has the same structure as the internal diffuser unit 7, allows the dried compressed air to enter from the compressed air outlet 3 in the reverse direction during the regeneration stage. After being evenly dispersed by the top gas collecting unit 10, it permeates downwards, ensuring that the regeneration airflow acts evenly on the adsorbent and avoiding insufficient regeneration. Finally, the compressed air dried in the adsorption stage is combed by the top gas collecting unit 10 and discharged from the compressed air outlet 3. The stainless steel filter screen at the outlet intercepts adsorbent particles, preventing them from being lost with the airflow and ensuring the stability of the total amount of adsorbent. Overall, it achieves efficient drying and long-term stable operation of the equipment.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An airflow distributor for an adsorption tower, comprising an adsorption tower body (1), and an upper fixed plate (8) and a lower fixed plate (4) located inside the adsorption tower body (1), characterized in that: The upper fixing plate (8) and the lower fixing plate (4) are both welded and installed at the upper and lower ends inside the adsorption tower body (1). The upper and lower ends of the adsorption tower body (1) are respectively provided with compressed air outlet (3) and compressed air inlet (2). The side of the lower fixing plate (4) facing the compressed air inlet (2) is provided with an inner diffusion unit (7) and an outer diffusion unit (6) from the inside to the outside. The inner diffusion unit (7) is welded to the lower inner fixing plate (5). The upper fixing plate (8) is provided with a top gas collection unit (10) at the end facing the compressed air outlet (3). The outer side of the adsorption tower body (1) is also provided with a support column (11), a safety valve interface (12), a packing port (13) and a lifting lug (14). The support column (11) is fixedly installed on the lower part of the outer side of the adsorption tower body (1), and the lifting lug (14) is fixedly installed on the upper part of the outer side of the adsorption tower body (1).

2. The gas flow distributor for an adsorption tower according to claim 1, characterized in that: The external diffusion unit (6) includes a connecting plate (601). An external cylindrical diffuser (602) is welded and installed on the side of the connecting plate (601) facing the compressed air inlet (2). A support bar (603) is welded and connected to the opening inside the external cylindrical diffuser (602). Several diffusion holes (604) arranged in a ring are opened on the outer side of the external cylindrical diffuser (602). The diameter of the diffusion holes (604) is 5mm to 8mm.

3. The airflow distributor for an adsorption tower according to claim 2, characterized in that: The connecting plate (601) and the outer cylindrical diffuser (602) are each provided with eight in a ring. The included angle between two adjacent outer cylindrical diffusers (602) is 45°. The connecting plate (601) and the lower fixing plate (4) are fixedly installed by bolts. The outer cylindrical diffuser (602) and the lower fixing plate (4) are connected by plug-in connection. The outer cylindrical diffuser (602) passes through the lower fixing plate (4) and extends into the interior of the adsorption tower body (1). The outer cylindrical diffuser (602) and the connecting plate (601) are both made of 304 stainless steel. The cross-section of the support bar (603) is Y-shaped.

4. The gas flow distributor for an adsorption tower according to claim 1, characterized in that: The inner diffusion unit (7) includes an inner cylindrical diffuser (701), which is welded to the lower inner fixing plate (5). The outer side of the inner cylindrical diffuser (701) is provided with a plurality of diffuser holes (702) arranged in a ring. A support bar (703) is welded to the opening inside the inner cylindrical diffuser (701). A support rod (704) is welded between the support bar (703) and the bottom inside the inner cylindrical diffuser (701). The inner cylindrical diffuser (701), the support bar (703) and the support rod (704) are all made of 304 stainless steel. The diameter of the diffuser hole (702) is 3mm to 5mm.

5. A gas flow distributor for an adsorption tower according to claim 4, characterized in that: The cross-section of the second support bar (703) is also Y-shaped. The number of the support rods (704) is three times that of the second support bar (703), and the three support rods (704) are distributed at a 120° angle around the vertical axis of the second support bar (703).

6. A gas flow distributor for an adsorption tower according to claim 4, characterized in that: The inner cylindrical diffusers (701) are arranged in a ring of ten. The inner cylindrical diffusers (701) are arranged in a ring around the axis of the lower inner fixed plate (5). The two adjacent inner cylindrical diffusers (701) are at an angle of 36°. The inner cylindrical diffusers (701) penetrate the lower inner fixed plate (5) and extend into the interior of the adsorption tower body (1).

7. A gas flow distributor for an adsorption tower according to claim 1, characterized in that: The adsorption tower body (1) contains an adsorbent, and stainless steel filters are installed at the openings of the compressed air outlet (3) and the compressed air inlet (2).

8. A gas flow distributor for an adsorption tower according to claim 1, characterized in that: The lower inner fixing plate (5) and the upper inner fixing plate (9) have the same size, and the lower inner fixing plate (5) and the upper inner fixing plate (9) are symmetrically distributed about the horizontal axis of the adsorption tower body (1). The inner diffusion unit (7) and the top gas collection unit (10) have the same structure. The upper inner fixing plate (9) and the upper fixing plate (8) are fixedly installed by bolts.

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