Dual-tower switch compressor air dryer

Abstract

The utility model discloses a kind of double-tower switching compressed air drying machine, it is related to double-tower switching compressed air drying machine technical field, including adsorption tower and regenerator, the side of adsorption tower and regenerator bottom is provided with air inlet hole, the middle part of air inlet hole is fixedly connected with air inlet pipe, the top of air inlet pipe surface is fixedly connected with air inlet valve, the lower part of adsorption tower and regenerator inner wall is fixedly connected with support grating, the top of support grating is fixedly connected with filter cloth;The utility model is combined by gas distribution branch, first valve and second valve, when personnel operating device is used, the flow of regenerative purge gas can be accurately controlled (control in 5% to 15% of total drying gas amount) by adjusting valve opening and closing size, when adsorption tower works, open the valve on the side of regenerator, and dry purge gas can be supplied to it, when two towers switch, only need to operate valve reversely, realize the quick switching of airflow direction, ensure that regeneration is thorough, and avoid energy waste.

Description

Technical Field

[0001] This utility model relates to the technical field of dual-tower switching compressed air dryers, specifically a dual-tower switching compressed air dryer. Background Technology

[0002] The dual-tower switching compressed air dryer is a device that achieves continuous drying of compressed air by alternating "adsorption and dehydration" and "regeneration and revival" in two towers. Its core consists of an adsorption tower and a regeneration tower with identical structure or function, as well as supporting pipelines and valves.

[0003] An existing dual-tower switching compressed air dryer, when in use, (1) The regeneration purge gas flow rate adjustment accuracy is low, and most of them are fixed split structures. They cannot dynamically adjust the purge gas flow rate according to the adsorbent saturation level, which easily leads to the problem of "excessive gas flow rate wastes energy, and insufficient gas flow rate results in incomplete regeneration", causing fluctuations in drying efficiency. (2) The adsorbent layer has poor fixation. The airflow impact can easily cause the layer to loosen and the particles to shift, which not only reduces the adsorption and regeneration effect, but may also generate dust pollution of the gas source. Moreover, the adsorbent replacement requires disassembling the tower body, which is cumbersome and time-consuming.

[0004] To address the above problems, this utility model provides a dual-tower switching compressed air dryer. Utility Model Content

[0005] The purpose of this invention is to provide a dual-tower switching compressed air dryer. This invention can dynamically adjust the regeneration purge air volume, stabilize the adsorbent layer, and simplify maintenance, thereby solving the problems of unstable regeneration effect, easy pollution of air source, and inconvenience of adsorbent replacement in existing equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual-tower switching compressed air dryer, comprising an adsorption tower and a regeneration tower, wherein an air inlet hole is provided on one side of the bottom of the adsorption tower and the regeneration tower, an air inlet pipe is fixedly connected to the middle of the air inlet hole, an air inlet valve is fixedly connected to the top of the surface of the air inlet pipe, a support grid plate is fixedly connected to the lower part of the inner wall of the adsorption tower and the regeneration tower, a filter cloth is fixedly connected to the top of the support grid plate, a first filter screen is placed on the top of the filter cloth, and an adsorbent layer is formed in the upper part of the first filter screen, i.e., in the middle of the adsorption tower and the regeneration tower.

[0007] Furthermore, an upper pressure plate is fixedly connected to the upper part of the inner wall of the adsorption tower and the regeneration tower. Several grooves are opened in the middle of the upper pressure plate, and the opening of the grooves allows dry air to flow out.

[0008] Furthermore, a second filter screen is threadedly connected to the bottom of the upper pressure plate, and threaded holes are evenly opened around the perimeter of the second filter screen, with a bolt threadedly connected to the center of the threaded holes.

[0009] Furthermore, a gas supply branch pipe is fixedly connected to the top of the adsorption tower and the regeneration tower, and a main channel is connected through the upper part of the surface of the gas supply branch pipe. The other end of the gas supply branch pipe is fixedly connected to the regeneration tower.

[0010] Furthermore, a first valve is fixedly connected to the top of the left side of the gas transmission branch pipe, and a second valve is fixedly connected to the top of the right side of the gas transmission branch pipe.

[0011] Furthermore, a switch door is rotatably connected to the center of the front of the adsorption tower and the regeneration tower, a sealing ring is fixedly connected to the inner side of the switch door, an observation window is fixedly connected to the front of the switch door, and a support leg is fixedly connected to the lower part of the surface of the adsorption tower and the regeneration tower.

[0012] Furthermore, a drain pipe is fixedly connected to the bottom of the adsorption tower and the regeneration tower, a drain valve is fixedly connected to the top of the surface of the drain pipe, a dehumidification pipe is fixedly connected to one side of the lower part of the adsorption tower and the regeneration tower, and a pressure relief valve is fixedly connected to the top of the surface of the dehumidification pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a dual-tower switching compressed air dryer. (1) By combining the gas supply branch pipe, the first valve and the second valve, when the personnel operate the device, the flow rate of the regeneration purge gas can be precisely controlled by adjusting the opening and closing of the valve (controlled at 5%-15% of the total dry gas volume). When the adsorption tower is working, the valve on the regeneration tower side can be opened to supply dry purge gas. When switching between the two towers, only the valve needs to be operated in the opposite direction to achieve a rapid switch of the airflow direction, which ensures thorough regeneration and avoids energy waste.

[0014] (2) Through the layered fixing structure of the support grid plate, filter cloth, first filter screen and upper pressure plate and second filter screen, the adsorbent layer is fixed from bottom to top when the personnel operate the device. The support grid plate bears the weight of the adsorbent, and the upper pressure plate presses the top of the layer, effectively resisting the impact of airflow and preventing the layer from loosening. The double filter screen blocks the adsorbent dust from entering the gas path, ensuring the cleanliness of the gas source. The second filter screen can be removed by bolts, making it easy to clean and replace. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the device of this utility model; Figure 2 This is a schematic diagram of the internal structure of the adsorption tower of this utility model; Figure 3 This is a schematic diagram of the rear structure of the device of this utility model; Figure 4 This is a schematic diagram of the filter screen position structure of this utility model; Figure 5 This is a schematic cross-sectional view of the present invention.

[0016] In the diagram: 1. Adsorption tower; 2. Regeneration tower; 3. Inlet pipe; 4. Support grid plate; 5. Filter cloth; 6. First filter screen; 7. Adsorbent layer; 8. Upper pressure plate; 9. Second filter screen; 10. Bolt; 11. Gas supply branch pipe; 12. Main channel; 13. First valve; 14. Second valve; 15. Opening and closing door; 16. Observation window; 17. Support leg; 18. Inlet valve; 19. Drain pipe; 20. Drain valve; 21. Dehumidification pipe; 22. Pressure relief valve. Detailed Implementation

[0017] 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.

[0018] To solve the problem of how to effectively position and adjust the technology, such as Figure 1-5 As shown, the following preferred technical solutions are provided: A dual-tower switching compressed air dryer includes an adsorption tower 1 and a regeneration tower 2. An air inlet hole is provided on one side of the bottom of the adsorption tower 1 and the regeneration tower 2. An air inlet pipe 3 is fixedly connected to the middle of the air inlet hole. An air inlet valve 18 is fixedly connected to the top of the surface of the air inlet pipe 3. A support grid plate 4 is fixedly connected to the lower part of the inner wall of the adsorption tower 1 and the regeneration tower 2. A filter cloth 5 is fixedly connected to the top of the support grid plate 4. A first filter screen 6 is placed on the top of the filter cloth 5. The upper part of the first filter screen 6, that is, the middle part of the adsorption tower 1 and the regeneration tower 2, is an adsorbent layer 7.

[0019] Specifically, when operating the device, personnel can simultaneously control the opening and closing of the air inlet valve 18, the first valve 13 and the second valve 14 of the air delivery branch pipe 11, and the pressure relief valve 22 through an external PLC control system or manual operation, so as to realize the alternating operation of the two towers and ensure the continuous output of dry compressed air.

[0020] Furthermore, such as Figure 2 As shown, the following preferred technical solutions are provided: An upper pressure plate 8 is fixedly connected to the upper part of the inner wall of the adsorption tower 1 and the regeneration tower 2. Several grooves are opened in the middle of the upper pressure plate 8. The grooves allow dry air to flow out. The upper pressure plate 8 adopts an annular structure that fits the inner wall of the tower. After it fits tightly against the tower wall, it forms a uniform pressure on the top of the adsorbent layer 7, which prevents the airflow from impacting the top and causing the adsorbent particles to shift. The grooves in the middle are evenly distributed along the circumference to ensure that the dry air flows out evenly from the top of the adsorbent layer 7, without causing excessive local pressure due to concentrated airflow, and without affecting the gas flow efficiency.

[0021] Furthermore, such as Figure 2 As shown, the following preferred technical solutions are provided: The bottom of the upper pressure plate 8 is threaded with a second filter screen 9. The second filter screen 9 has evenly spaced threaded holes around its perimeter, and a bolt 10 is threaded into the center of each hole. The purpose of this design is that the second filter screen 9 is made of 304 stainless steel with a mesh size of 0.1-0.3mm, which can block adsorbent dust without obstructing airflow. The bolt 10 firmly fixes the second filter screen 9 to the bottom of the upper pressure plate 8. To remove it, simply open the switch door 15 and unscrew the bolt to remove the second filter screen 9, which is convenient for regular cleaning or replacement and prevents dust accumulation from affecting the filtration effect.

[0022] Furthermore, such as Figure 5 As shown, the following preferred technical solutions are provided: The top of the adsorption tower 1 and the regeneration tower 2 are fixedly connected to the gas supply branch pipe 11. The upper part of the surface of the gas supply branch pipe 11 is connected to the main channel 12. The other end of the gas supply branch pipe 11 is fixedly connected to the regeneration tower 2. The purpose of this design is that the gas supply branch pipe 11 adopts an inverted T-shaped tee structure, with one end connected to the gas outlet at the top of the adsorption tower 1, the other end connected to the gas inlet at the top of the regeneration tower 2, and the middle part connected to the main channel 12, so as to realize the sharing of the pipeline for "adsorption gas outlet" and "regeneration gas inlet", without the need to lay additional regeneration-specific pipes, thus simplifying the equipment structure.

[0023] Furthermore, such as Figure 1 As shown, the following preferred technical solutions are provided: A first valve 13 is fixedly connected to the top left side of the gas supply branch pipe 11, and a second valve 14 is fixedly connected to the top right side of the gas supply branch pipe 11. When the adsorption tower 1 is working, the first valve 13 is opened (fully open, allowing the dry gas to enter the main channel 12) and the second valve 14 is opened (to 5%-15% of the scale, diverting the dry gas to the regeneration tower 2). When switching between the two towers, the first valve 13 is closed and the second valve 14 is opened (fully open), allowing the dry gas from the regeneration tower 2 to enter the main channel 12. At the same time, the first valve 13 is opened (to 5%-15%) to supply regeneration gas to the adsorption tower 1. The function switching is achieved through the reverse operation of the valves, avoiding crosstalk between the airflow of the two towers.

[0024] Furthermore, such as Figure 1As shown, the following preferred technical solutions are provided: A switch door 15 is rotatably connected to the center of the front of the adsorption tower 1 and the regeneration tower 2. A sealing ring is fixedly connected to the inner side of the switch door 15. An observation window 16 is fixedly connected to the front of the switch door 15. Support legs 17 are fixedly connected to the lower part of the surface of the adsorption tower 1 and the regeneration tower 2. The opening angle of the switch door 15 is 90°, which is convenient for personnel to reach or use tools to replace the adsorbent. The sealing ring is made of oil-resistant and heat-resistant nitrile rubber with a compression of up to 30%, which ensures that the pressure inside the tower is stable and leak-free. The observation window 16 is made of double-layer tempered glass, which is resistant to high pressure and has high light transmittance, allowing personnel to observe in real time whether the adsorbent layer 7 is loose or has water accumulation. The support legs 17 are made of carbon steel welded structure with foot pads at the bottom to ensure that the equipment is placed horizontally and to prevent the tower from tilting and causing uneven distribution of the adsorbent layer 7.

[0025] Furthermore, such as Figure 1 As shown, the following preferred technical solutions are provided: A drain pipe 19 is fixedly connected to the bottom of adsorption tower 1 and regeneration tower 2. A drain valve 20 is fixedly connected to the top of the surface of drain pipe 19. A dehumidification pipe 21 is fixedly connected to one side of the lower part of adsorption tower 1 and regeneration tower 2. A pressure relief valve 22 is fixedly connected to the top of the surface of dehumidification pipe 21. Drain pipe 19 is located at the lowest point of the tower bottom and is used to discharge the residual condensate after compressed air pretreatment. Drain valve 20 is normally closed and is only opened periodically before the equipment is started or during adsorption. The connection position of dehumidification pipe 21 is higher than that of drain pipe 19 to prevent condensate from entering dehumidification pipe 21. Pressure relief valve 22 is a special valve for regeneration. When opened, it can reduce the pressure inside the tower from the working pressure to below 0.05MPa, providing a smooth passage for regeneration purging gas and discharging the purging exhaust gas carrying moisture. Pressure relief valve 22 and the valve of gas supply branch pipe 11 open synchronously to ensure a closed loop in the regeneration process.

[0026] Working principle: Adsorption drying process of adsorption tower 1: ① Open the inlet valve 18 of adsorption tower 1 (fully open) and close the inlet valve 18 of regeneration tower 2; ② Open the first valve 13 on the side of adsorption tower 1 (fully open) and close the second valve 14 on the side of regeneration tower 2 (close it first, and adjust the opening after depressurization); ③ The pretreated humid compressed air enters the bottom of adsorption tower 1 through the inlet pipe 3, passes through the support grid plate 4 that bears the weight of the adsorbent in sequence, and the gas passes through the gaps in the grid plate → filter cloth 5 (blocking fine dust and protecting the adsorbent) → first filter screen 6 (further filtering to ensure that the airflow enters the adsorbent layer 7 evenly); ④ The humid air comes into full contact with the adsorbent layer 7 (activated alumina or molecular sieve), and the moisture is physically adsorbed by the pores of the adsorbent. The dried air continues to permeate upward; ⑤ The dried air passes through the second filter screen 9 (blocking adsorbent dust) → the groove of the upper pressure plate 8 → the gas supply branch pipe 11 → the first valve 13 → the main channel 12. Part of it is delivered to the gas-using end (such as pneumatic equipment and instruments), and the other part is retained for purging of regeneration tower 2.

[0027] Regeneration process of regeneration tower 2: ① After the adsorption tower 1 outputs gas stably, open the pressure relief valve 22 of regeneration tower 2 (fully open) to quickly release the residual pressure of the previous adsorption in regeneration tower 2 to below 0.05MPa; ② Adjust the second valve 14 on the side of regeneration tower 2 to 5%-15% opening, and the dry gas in the main channel 12 enters the top of regeneration tower 2 through the second valve 14 → gas supply branch pipe 11; ③ The dry purging gas penetrates the adsorbent layer 7 of regeneration tower 2 from top to bottom (opposite to the adsorption airflow direction, i.e., counter-purging, which can fully contact the deep layer of adsorbent and improve the desorption effect), desorbing and entraining the moisture in the pores of the adsorbent; ④ The humid waste gas carrying moisture is discharged from the equipment through the humidification pipe 21 at the bottom of regeneration tower 2 → pressure relief valve 22, completing the regeneration; ⑤ During the regeneration process, the drain valve 20 is kept closed to prevent the purging gas from leaking from the drain pipe 19.

[0028] Two-tower switching process: ① After adsorption tower 1 has been working for 3-10 minutes (set according to the humidity requirements of the gas user), the adsorbent is close to saturation, at which point the switching program is started; ② Close the inlet valve 18 and the first valve 13 of adsorption tower 1, and open the pressure relief valve 22 of adsorption tower 1 to put it into regeneration state; ③ Close the pressure relief valve 22 and the second valve 14 of regeneration tower 2 (adjust to full open), and open the inlet valve 18 of regeneration tower 2 to switch it to adsorption state; ④ Repeat the above adsorption and regeneration process, with the two towers working alternately to achieve 24-hour continuous output of dry air.

[0029] Maintenance and observation: Personnel can check through the observation window 16 whether the adsorbent layer 7 in the two towers is loose or has water accumulation; when the adsorbent adsorption capacity decreases, the adsorbent can be quickly replaced by opening the switch door 15. After replacement, the switch door 15 should be closed, and the sealing ring should be used to ensure sealing performance; the drain valve 20 should be opened regularly to drain the condensate to avoid water accumulation affecting the adsorption effect.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] 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. A dual-tower switching compressed air dryer, comprising an adsorption tower (1) and a regeneration tower (2), characterized in that: An air inlet hole is provided on one side of the bottom of the adsorption tower (1) and the regeneration tower (2). An air inlet pipe (3) is fixedly connected to the middle of the air inlet hole. An air inlet valve (18) is fixedly connected to the top of the surface of the air inlet pipe (3). A support grid plate (4) is fixedly connected to the lower part of the inner wall of the adsorption tower (1) and the regeneration tower (2). A filter cloth (5) is fixedly connected to the top of the support grid plate (4). A first filter screen (6) is placed on the top of the filter cloth (5). The upper part of the first filter screen (6), that is, the middle part of the adsorption tower (1) and the regeneration tower (2), is an adsorbent layer (7).

2. The dual-tower switching compressed air dryer according to claim 1, characterized in that: An upper pressure plate (8) is fixedly connected to the upper part of the inner wall of the adsorption tower (1) and the regeneration tower (2). Several grooves are opened in the middle of the upper pressure plate (8), and the opening of the grooves allows dry air to flow out.

3. A dual-tower switching compressed air dryer according to claim 2, characterized in that: The bottom of the upper pressure plate (8) is threaded with a second filter screen (9), and threaded holes are evenly opened around the second filter screen (9). A bolt (10) is threaded in the middle of the threaded hole.

4. A dual-tower switching compressed air dryer according to claim 1, characterized in that: The top of the adsorption tower (1) and the regeneration tower (2) are fixedly connected to a gas supply branch pipe (11), and the upper part of the surface of the gas supply branch pipe (11) is connected to a main channel (12). The other end of the gas supply branch pipe (11) is fixedly connected to the regeneration tower (2).

5. A dual-tower switching compressed air dryer according to claim 4, characterized in that: A first valve (13) is fixedly connected to the top left side of the gas transmission branch pipe (11), and a second valve (14) is fixedly connected to the top right side of the gas transmission branch pipe (11).

6. A dual-tower switching compressed air dryer according to claim 1, characterized in that: A switch door (15) is rotatably connected to the center of the front of the adsorption tower (1) and the regeneration tower (2). A sealing ring is fixedly connected to the inner side of the switch door (15). An observation window (16) is fixedly connected to the front of the switch door (15). A support leg (17) is fixedly connected to the lower part of the surface of the adsorption tower (1) and the regeneration tower (2).

7. A dual-tower switching compressed air dryer according to claim 1, characterized in that: The bottom of the adsorption tower (1) and the regeneration tower (2) are fixedly connected to a drain pipe (19), and the top of the surface of the drain pipe (19) is fixedly connected to a drain valve (20). A dehumidification pipe (21) is fixedly connected to one side of the lower part of the adsorption tower (1) and the regeneration tower (2), and a pressure relief valve (22) is fixedly connected to the top of the surface of the dehumidification pipe (21).

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