A pressure swing adsorption PSA biogas purification equipment

Abstract

The present invention provides a pressure swing adsorption (PSA) biogas purification device, which belongs to the technical field of biogas adsorption purification, and comprises a supporting base, a fixing plate is fixedly installed above the supporting base, and a bottom supporting block is fixedly installed above the fixing plate; the pressure swing adsorption (PSA) biogas purification device provided by the present invention has four main air inlet pipes installed above the dry gas outlet, each main air inlet pipe is interconnected with the corresponding adsorption tower, and a first air valve is installed inside each main air inlet pipe, so that the biogas enters different adsorption towers for purification, and the adsorption towers are used alternately, and the overall utilization rate of the device is higher. When in use, the first air valve of the main air inlet pipes connected to each other at the bottom of the adsorption tower that needs to be used is opened, and then the first air valve at the bottom of the adsorption tower that does not need to be used is closed. Then, when the two adsorption towers on the left need to be used, the biogas can circulate through the near pipe, so the flow path is shorter, and the overall efficiency of the device is also higher.

Description

Technical Field

[0001] The invention relates to the technical field of biogas adsorption purification, and in particular to a pressure swing adsorption (PSA) biogas purification device. Background Art

[0002] Biogas is a mixture consisting mainly of methane and a small amount of hydrogen sulfide, carbon dioxide and trace amounts of phosphine. It is produced naturally in certain geographical swamps. The surface of the swamp was originally porous vegetation, which formed a crust after decay, preventing oxygen from contacting the organic matter below. When biogas is produced from an anaerobic fermentation device, especially when fermented at medium and high temperatures, it carries a large amount of H2S. Since there is still a large amount of water vapor in the biogas, the water and H2S in the biogas work together to accelerate the corrosion and blockage of metal pipes, valves, and flow meters. To avoid the need to purify the biogas before use, a pressure swing adsorption biogas purification device is required.

[0003] The existing pressure swing adsorption biogas purification device is not efficient during use, the number of adsorption purification towers is insufficient, and it is not convenient to use. Summary of the invention

[0004] The invention provides a pressure swing adsorption (PSA) biogas purification device, aiming to solve the problems in the prior art that the existing pressure swing adsorption biogas purification device has low efficiency during use, insufficient number of adsorption purification towers and is inconvenient to use.

[0005] The present invention is implemented as follows: it includes a support base, a fixing plate is fixedly installed on the top of the support base, a bottom support block is fixedly installed on the top of the fixing plate, side rods are fixed on the left and right sides of the bottom support block, and a mounting plate is welded and installed on the top of the side rods.

[0006] Preferably, a gas compressor is installed on the upper left side of the mounting plate, a gas compressor is installed on the right end of the gas compressor, a compressed gas outlet is installed on the output end of the gas compressor, the other end of the compressed gas outlet is interconnected with the air intake buffer tank, and the compressed gas outlet and the air intake buffer tank are in flow with each other.

[0007] Preferably, a dehumidification tower is connected and fixed to the right side of the air intake buffer tank, a ball ring is installed inside the dehumidification tower, a conical ash removal port is opened at the bottom of the dehumidification tower, a sealing ring is installed in front of the dehumidification tower, the sealing ring and the dehumidification tower are perpendicular to each other, and a dry gas outlet is installed on the top of the dehumidification tower, and the dry gas outlet is in an inverted "C" shape.

[0008] Preferably, a main air intake pipe that circulates with each other is installed above the dry gas outlet, and the main air intake pipe is installed with four symmetrical ones, a first air valve is installed inside the main air intake pipe, a second air valve is installed inside the dry gas outlet between the main air intake pipes, a near pipe is installed between the left and right main air intake pipes, the near pipe is installed on the left side of the second air valve, the dry gas outlet and the near pipe circulate with each other, and a third air valve is installed inside the near pipe.

[0009] Preferably, an adsorption tower is installed on the top of the main air intake pipe, and the adsorption tower is provided with four mutually symmetrical groups. An inner material trough of matching size is installed inside the adsorption tower, and through holes are evenly opened at the bottom of the inner material trough.

[0010] Preferably, a first air outlet that is mutually circulated is installed on the top of the adsorption tower, and the first air outlet, the adsorption tower and the main air inlet pipe are mutually circulated, a fourth air valve is installed inside the first air outlet, and clean air pipes that are perpendicular and circulated to each other are installed on the top of the fourth air valve, an exhaust gas valve is installed on the upper left of the fourth air valve, and a main exhaust gas pipe that is mutually circulated with the clean air pipe is installed on the left side of the exhaust gas valve, a clean air valve is installed on the upper right of the first air outlet, a second air outlet is installed on the right side of the first air outlet, three groups of the second air outlet are installed, the second air outlet and the clean air pipe are mutually circulated, a fifth air valve is installed inside each of the second air outlets, and a clean air outlet is installed at the end of the clean air pipe.

[0011] Preferably, an auxiliary exhaust pipe that is in communication with the second exhaust outlet is installed below the fifth air valve, and an auxiliary exhaust pipe is installed inside the auxiliary exhaust pipe. The auxiliary exhaust pipe and the main exhaust pipe are in communication with each other, and an exhaust gas treatment tower is installed at the end of the main exhaust pipe.

[0012] Preferably, an air storage tank is installed at the end of the clean air outlet, and the air storage tank and the clean air outlet are in communication with each other.

[0013] The pressure swing adsorption (PSA) biogas purification equipment provided by the present invention enables the support base to support the entire device, and the support base can make the device more stable, thereby preventing the device from shifting on the ground and affecting the use of the device. At the same time, the fixing plate installed on the top of the support base makes the entire device more flat, which is convenient for the use of the device. Then, the mounting plate can install the gas compressor and the exhaust gas treatment tower on the top together with the air intake buffer tank, so that the entire device saves more space. In the pressure swing adsorption (PSA) biogas purification equipment provided by the present invention, the gas inside the air intake buffer tank enters the interior of the dehumidification tower to remove water vapor in the biogas. Because the biogas contains a large amount of moisture, if it directly enters the adsorption tower for treatment, it will affect the adsorption effect and life of the adsorbent inside the adsorption tower, thereby affecting the biogas purification effect. The moisture in the gas will also cause problems such as frost and freezing of the adsorption tower, affecting the smooth progress of the purification process. At the same time, dehydration materials can be placed in the ball ring installed inside the dehumidification tower, and the waste materials after use can be taken out of the device through the ash removal port to avoid material loss. The pressure swing adsorption PSA biogas purification device provided by the present invention is that the biogas after dehumidification from the inside of the dehumidification tower enters the device through the dry gas outlet for purification, and four main air inlet pipes are installed above the dry gas outlet, each of which is interconnected with the corresponding adsorption tower, and a first air valve is installed inside each main air inlet pipe, so that the biogas can enter different adsorption towers for purification, so that the adsorption towers are used alternately, and the overall utilization rate of the device is higher. When in use, the first air valve of the main air inlet pipes interconnected at the bottom of the adsorption tower to be used is opened, and then the first air valve at the bottom of the adsorption tower that is not in use is closed. Then, when the two adsorption towers on the left are needed to be used, the biogas can be circulated through the near pipe, so the circulation path is shorter, and the overall efficiency of the device is also higher; The pressure swing adsorption (PSA) biogas purification equipment provided by the present invention discharges the gas adsorbed from the adsorption tower through the first outlet and the second outlet. If the gas discharged from the first outlet is pure biogas, the waste gas valve on the left side of the first outlet is closed, and then the clean gas valve is opened to allow the biogas to pass through the clean gas pipe into the gas storage tank for storage. At the same time, what flows out from the three second outlets on the right side is purified biogas, so the waste gas pipe valve inside the auxiliary waste gas pipe connected to the side of the second outlet is closed, and the fifth gas valve inside the second outlet is opened to allow the biogas to pass through the clean gas pipe into the gas storage tank for storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in the field of biogas adsorption and purification technology, other drawings can be obtained based on these drawings without creative work. The above and other purposes, features and advantages of the present invention will be more clear as shown in the drawings. The same reference numerals in all the drawings indicate the same parts, and the drawings are not deliberately scaled according to the actual size. The focus is on illustrating the main purpose of the present invention.

[0015] Figure 1It is a front view structural schematic diagram of the pressure swing adsorption PSA biogas purification equipment provided by Embodiments 1 to 3 of the present invention; Figure 2 It is a schematic cross-sectional structural diagram of a pressure swing adsorption (PSA) biogas purification device provided in Embodiments 1 to 3 of the present invention; Figure 3 It is a schematic diagram of the structure of a buffer tank of a pressure swing adsorption PSA biogas purification device provided in Embodiments 1 to 3 of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the adsorption tower of the pressure swing adsorption PSA biogas purification equipment provided in Embodiments 1 to 4 of the present invention; Figure 5 It is a schematic diagram of the adsorption tower structure of the pressure swing adsorption PSA biogas purification equipment provided in the fourth and fifth embodiments of the present invention; Figure 6 Schematic diagram of the air inlet pipe structure of the pressure swing adsorption PSA biogas purification equipment provided in the fourth and fifth embodiments of the present invention; Figure 7 It is a schematic diagram of the gas outlet pipe structure of the pressure swing adsorption (PSA) biogas purification equipment provided in Example 5 of the present invention.

[0016] Summary of reference numerals: 1. Support base; 2. Fixing plate; 3. Bottom support block; 4. Side rod; 5. Mounting plate; 6. Raw air inlet; 7. Gas compressor; 8. Compressed air outlet; 9. Air inlet buffer tank; 10. Dehumidification tower; 11. Ball ring; 12. Ash removal port; 13. Sealing ring; 14. Dry gas outlet; 15. Main air inlet pipe; 16. First air valve; 17. Second air valve; 18. Near pipe; 19. third air valve; 20. adsorption tower; 21. inner material tank; 22. through hole; 23. first air outlet; 24. fourth air valve; 25. waste gas valve; 26. main waste gas pipe; 27. clean gas pipe; 28. clean gas valve; 29. ​​second air outlet; 30. fifth air valve; 31. auxiliary waste gas pipe; 32. waste gas pipe valve; 33. clean gas outlet; 34. gas storage tank; 35. waste gas treatment tower. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field of biogas adsorption purification technology without creative work are within the scope of protection of the present invention.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0021] For example, see Figure 1-4 . This embodiment provides a pressure swing adsorption (PSA) biogas purification device, including a support base 1, a fixed plate 2 is fixedly installed on the top of the support base 1, a bottom support block 3 is fixedly installed on the top of the fixed plate 2, side rods 4 are fixed on the left and right sides of the bottom support block 3, and a mounting plate 5 is welded and installed on the top of the side rod 4, so that the support base 1 supports the device as a whole, and the support base 1 can make the device more stable, avoid the device from shifting on the ground, and affect the use of the device. At the same time, the fixed plate 2 installed on the top of the support base 1 makes the device as a whole more flat, which is convenient for the use of the device. Then the mounting plate 5 can install the gas compressor 7 and the exhaust gas treatment tower 35 on the top together with the air intake buffer tank 9, so that the device as a whole is more space-saving.

[0022] For example 2, please refer to Figure 1-4 A gas compressor 7 is installed on the upper left side of the mounting plate 5, a gas compressor 7 is installed on the right end of the gas compressor 7, a compressed gas outlet 8 is installed on the output end of the gas compressor 7, the other end of the compressed gas outlet 8 is connected to the air intake buffer tank 9, and the compressed gas outlet 8 and the air intake buffer tank 9 are circulated with each other. The raw gas inlet 6 can be filled with the freshly extracted biogas that has not been cleaned into the gas compressor 7, and then the biogas is pressurized by the gas compressor 7. After pressurization, it is passed into the air intake buffer tank 9 through the compressed gas outlet 8 for storage. The air intake buffer tank 9 can assist the internal air pressure of the equipment to be more stable during use, so that the device is more stable in the process of purifying biogas and is convenient to use.

[0023] For example 3, please refer to Figure 1-4A dehumidification tower 10 is connected and fixed to the right side of the air intake buffer tank 9, a ball ring 11 is installed inside the dehumidification tower 10, a conical ash removal port 12 is opened at the bottom of the dehumidification tower 10, a sealing ring 13 is installed in front of the dehumidification tower 10, the sealing ring 13 and the dehumidification tower 10 are perpendicular to each other, and a dry gas outlet 14 is installed on the top of the dehumidification tower 10, and the dry gas outlet 14 is in an inverted "C" shape. The gas inside the air intake buffer tank 9 enters the interior of the dehumidification tower 10 to remove the water vapor in the biogas. Because the biogas contains a large amount of moisture, if it directly enters the adsorption tower 20 for treatment, it will affect the adsorption effect and life of the adsorbent inside the adsorption tower 20, and then affect the purification effect of the biogas. The moisture in the gas will also cause the adsorption tower 20 to frost and freeze, affecting the smooth progress of the purification process. At the same time, dehydration materials can be placed in the ball ring 11 installed inside the dehumidification tower 10, and the waste materials after use can be taken out of the device through the ash removal port 12 to avoid material loss.

[0024] Example 4, please refer to Figure 4-6 A main air intake pipe 15 that circulates with each other is installed above the dry gas outlet 14. The main air intake pipe 15 is installed with four symmetrical, first air valves 16 installed inside the main air intake pipes 15. A second air valve 17 is installed inside the dry gas outlet 14 between the main air intake pipes 15. A near pipe 18 is installed between the main air intake pipes 15 on the left and right sides. The near pipe 18 is installed on the left side of the second air valve 17. The dry gas outlet 14 and the near pipe 18 circulate with each other. A third air valve 19 is installed inside the near pipe 18. The biogas after dehumidification from the dehumidification tower 10 enters the device for purification through the dry gas outlet 14. Four main air intake pipes 15 are installed above the dry gas outlet 14. Each main air intake pipe 15 is interconnected with the corresponding adsorption tower 20, and a first air valve 16 is installed inside each main air intake pipe 15, so that the biogas can enter different adsorption towers 20 for purification, so that the adsorption towers 20 can be used alternately, and the overall utilization rate of the device is higher. When in use, the first air valve 16 of the main air intake pipe 15 connected to each other at the bottom of the adsorption tower 20 that needs to be used is opened, and then the first air valve 16 at the bottom of the adsorption tower 20 that does not need to be used is closed. Then, when the two adsorption towers 20 on the left need to be used, the biogas can circulate through the near pipe 18, so the flow path is shorter, which also makes the overall efficiency of the device higher.

[0025] An adsorption tower 20 is installed on the top of the main air intake pipe 15. The adsorption tower 20 is provided with four groups symmetrically. An inner material trough 21 of matching size is installed inside the adsorption tower 20. Through holes 22 are evenly opened at the bottom of the inner material trough 21. The biogas flowing through the main air intake pipe 15 will enter the interior of the adsorption tower 20 for adsorption and purification. Molecular sieve adsorbent is placed in the inner material trough 21 inside the adsorption tower 20. The molecular sieve has different adsorption capacities for biogas and internal impurity gases, so the biogas can be purified and separated. After the internal adsorbent reaches adsorption saturation equilibrium, the first air valve 16 at the bottom can be closed to release the waste gas in the adsorbent, so that the adsorbent can be regenerated, which is convenient for repeated use of the device. Four groups of adsorption towers 20 are arranged inside the device, so that the device has a higher efficiency in purifying biogas, and the internal adsorbent has more time to regenerate, which is convenient for use.

[0026] For example 5, please refer to Figure 5-7 A first air outlet 23 that is in communication with each other is installed on the top of the adsorption tower 20. The first air outlet 23, the adsorption tower 20 and the main air inlet pipe 15 are in communication with each other. A fourth air valve 24 is installed inside the first air outlet 23. A clean air pipe 27 that is perpendicular to each other and in communication is installed on the top of the fourth air valve 24. An exhaust gas valve 25 is installed on the upper left of the fourth air valve 24. A main exhaust gas pipe 26 that is in communication with the clean air pipe 27 is installed on the left side of the exhaust gas valve 25. A clean air valve 28 is installed on the upper right of the first air outlet 23. A second air outlet 29 is installed on the right side of the first air outlet 23. The second air outlet 29 is provided with three groups. The second air outlet 29 and the clean air pipe 27 are in communication with each other. A fifth air valve 3 is installed inside the second air outlet 29. 0. A clean gas outlet 33 is installed at the end of the clean gas pipe 27. The gas adsorbed from the adsorption tower 20 is discharged through the first outlet 23 and the second outlet 29. If the gas discharged from the first outlet 23 is pure biogas, the waste gas valve 25 on the left side of the first outlet 23 is closed, and then the clean gas valve 28 is opened to allow the biogas to pass through the clean gas pipe 27 into the gas storage tank 34 for storage. At the same time, what flows out from the three second outlets 29 on the right side is purified biogas, so the waste gas pipe valve 32 inside the auxiliary waste gas pipe 31 connected to the side of the second outlet 29 is closed, and the fifth valve 30 inside the second outlet 29 is opened to allow the biogas to pass through the clean gas pipe 27 into the gas storage tank 34 for storage.

[0027] Auxiliary exhaust pipes 31 are installed below the fifth air valve 30, which are in communication with the second air outlet 29, and auxiliary exhaust pipes 31 are installed inside the auxiliary exhaust pipes 31. The auxiliary exhaust pipes 31 and the main exhaust pipe 26 are in communication with each other. An exhaust gas treatment tower 35 is installed at the end of the main exhaust pipe 26. In the process of regenerating the adsorbent inside the adsorption tower 20, if the adsorbent in the adsorption tower 20 at the bottom of the first air outlet 23 is to be regenerated, the clean air valve 28 on the right side of the first air outlet 23 is closed, and then the left side of the first air outlet 23 is closed. The exhaust gas valve 25 on the side is opened to allow the exhaust gas emitted during adsorbent regeneration to enter the main exhaust pipe 26 for discharge. When the adsorbent in the three adsorption towers 20 on the right side is regenerated, the fifth valve 30 inside the second gas outlet 29 connected to the fixed adsorption tower 20 is closed, and then the exhaust pipe valve 32 inside the auxiliary exhaust pipe 31 connected to the side of the second gas outlet 29 is opened to allow the exhaust gas to enter the auxiliary exhaust pipe 31 and finally merge into the main exhaust pipe 26, and then be discharged into the exhaust gas treatment tower 35 through the main exhaust pipe 26 for exhaust gas treatment.

[0028] A gas storage tank 34 is installed at the end of the clean gas outlet 33, and the gas storage tank 34 and the clean gas outlet 33 are in communication with each other. The gas storage tank 34 at the end of the clean gas outlet 33 stores the purified biogas for subsequent use.

[0029] Working principle, first, the support base 1 supports the device as a whole, the support base 1 can make the device more stable, avoid the device from shifting on the ground and affecting the use of the device, and at the same time the fixed plate 2 installed on the top of the support base 1 makes the device as a whole more flat, which is convenient for the use of the device, and then the mounting plate 5 can install the gas compressor 7 and the waste gas treatment tower 35 on the top together with the air intake buffer tank 9, so that the device as a whole can save more space, and then the interior of the raw air inlet 6 can be filled with the freshly extracted biogas that has not been cleaned into the gas compressor 7, and then the biogas is pressurized by the gas compressor 7, and after pressurization, it is passed into the interior of the air intake buffer tank 9 through the compressed gas outlet 8 for storage, and the air intake buffer tank 9 can assist the equipment in using the internal air pressure to be more stable, so that the device is more stable in the process of purifying biogas and convenient to use; The gas inside the air inlet buffer tank 9 enters the dehumidification tower 10 to remove water vapor in the biogas. Because the biogas contains a large amount of water, if it directly enters the adsorption tower 20 for treatment, it will affect the adsorption effect and life of the adsorbent inside the adsorption tower 20, thereby affecting the biogas purification effect. The water in the gas will also cause problems such as frost and freezing of the adsorption tower 20, affecting the smooth progress of the purification process. At the same time, dehydration materials can be placed in the ball ring 11 installed inside the dehumidification tower 10, and the waste materials after use can be taken out of the device through the ash removal port 12 to avoid material loss. The biogas after dehumidification from the inside of the dehumidification tower 10 enters the device through the dry gas outlet 14 for purification. Four main air inlet pipes 15 are installed above the dry gas outlet 14. Each main air inlet pipe 15 is interconnected with the corresponding adsorption tower 20, and a first air valve 16 is installed inside each main air inlet pipe 15. Therefore, the biogas can enter different adsorption towers 20 for purification, so that the adsorption towers 20 can be used alternately, and the overall utilization rate of the device is higher. When in use, the first air valve 16 of the main air inlet pipes 15 connected to each other at the bottom of the adsorption tower 20 that needs to be used is opened, and then the first air valve 16 at the bottom of the adsorption tower 20 that does not need to be used is closed. Then, when the two adsorption towers 20 on the left are needed, At this time, the biogas can be circulated through the near pipe 18, so the circulation path is shorter, and the overall efficiency of the device is higher. The biogas flowing through the main air inlet pipe 15 will enter the adsorption tower 20 for adsorption and purification. A molecular sieve adsorbent is placed in the inner material tank 21 inside the adsorption tower 20. The molecular sieve has different adsorption capacities for biogas and internal impurity gases, so the biogas can be purified and separated. After the internal adsorbent reaches adsorption saturation equilibrium, the first air valve 16 at the bottom can be closed to release the waste gas in the adsorbent, so that the adsorbent can be regenerated, which is convenient for repeated use of the device. Four groups of adsorption towers 20 are set inside the device, so that the device has a higher efficiency in purifying biogas and the internal adsorbent has more time to regenerate; The gas adsorbed from the adsorption tower 20 is discharged through the first gas outlet 23 and the second gas outlet 29. If the gas discharged from the first gas outlet 23 is pure biogas, the waste gas valve 25 on the left side of the first gas outlet 23 is closed, and then the clean gas valve 28 is opened to allow the biogas to pass through the clean gas pipe 27 into the gas storage tank 34 for storage. At the same time, what flows out from the three second gas outlets 29 on the right side is purified biogas, so the waste gas pipe valve 32 inside the auxiliary waste gas pipe 31 connected to the side of the second gas outlet 29 is closed, and the fifth gas valve 30 inside the second gas outlet 29 is opened to allow the biogas to pass through the clean gas pipe 27 into the gas storage tank 34 for storage. The adsorbent inside the adsorption tower 20 is regenerated. During the process, if the adsorbent in the adsorption tower 20 at the bottom of the first gas outlet 23 is to be regenerated, the clean air valve 28 on the right side of the first gas outlet 23 is closed, and then the exhaust gas valve 25 on the left side of the first gas outlet 23 is opened, so that the exhaust gas discharged from the adsorbent regeneration enters the main exhaust pipe 26 for discharge. When regenerating the adsorbent inside the three adsorption towers 20 on the right, the fifth air valve 30 inside the second gas outlet 29 connected to the fixed adsorption tower 20 is closed, and then the exhaust pipe valve 32 inside the auxiliary exhaust pipe 31 connected to the side of the second gas outlet 29 is opened, so that the exhaust gas enters the auxiliary exhaust pipe 31 and finally merges into the main exhaust pipe 26, and is discharged into the exhaust gas treatment tower 35 through the main exhaust pipe 26 for exhaust gas treatment.

[0030] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to a person skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but shall conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure swing adsorption (PSA) biogas purification device, comprising a support base, characterized in that: A fixing plate is fixedly installed on the upper part of the support base, a bottom support block is fixedly installed on the upper part of the fixing plate, side rods are fixed on both the left and right sides of the bottom support block, and a mounting plate is welded and installed on the top of the side rods.

2. The pressure swing adsorption (PSA) biogas purification equipment according to claim 1, characterized in that: A gas compressor is installed on the upper left side of the mounting plate, a gas compressor is installed on the right end of the gas compressor, a compressed gas outlet is installed on the output end of the gas compressor, the other end of the compressed gas outlet is interconnected with the air intake buffer tank, and the compressed gas outlet and the air intake buffer tank are in communication with each other.

3. The pressure swing adsorption (PSA) biogas purification equipment according to claim 2, characterized in that: A dehumidification tower is connected and fixed to the right side of the air intake buffer tank, a ball ring is installed inside the dehumidification tower, a conical ash removal port is opened at the bottom of the dehumidification tower, a sealing ring is installed in front of the dehumidification tower, the sealing ring and the dehumidification tower are perpendicular to each other, and a dry gas outlet is installed on the top of the dehumidification tower, and the dry gas outlet is in an inverted "C" shape.

4. The pressure swing adsorption (PSA) biogas purification equipment according to claim 3, characterized in that: A main air intake pipe that circulates with each other is installed above the dry gas outlet, and the main air intake pipe is installed with four symmetrical ones. A first air valve is installed inside the main air intake pipe, and a second air valve is installed inside the dry gas outlet between the main air intake pipes. A near pipe is installed between the left and right main air intake pipes, and the near pipe is installed on the left side of the second air valve. The dry gas outlet and the near pipe circulate with each other, and a third air valve is installed inside the near pipe.

5. The pressure swing adsorption (PSA) biogas purification equipment according to claim 4, characterized in that: An adsorption tower is installed on the top of the main air intake pipe. The adsorption tower is provided with four mutually symmetrical groups. An inner material trough with matching size is installed inside the adsorption tower. Through holes are evenly opened at the bottom of the inner material trough.

6. The pressure swing adsorption (PSA) biogas purification equipment according to claim 5, characterized in that: A first air outlet that is mutually circulated is installed on the top of the adsorption tower, and the first air outlet, the adsorption tower and the main air inlet pipe are mutually circulated, a fourth air valve is installed inside the first air outlet, and clean air pipes that are perpendicular and circulated to each other are installed on the top of the fourth air valve, an exhaust gas valve is installed on the upper left of the fourth air valve, and a main exhaust gas pipe that is mutually circulated with the clean air pipe is installed on the left side of the exhaust gas valve, a clean air valve is installed on the upper right of the first air outlet, a second air outlet is installed on the right side of the first air outlet, three groups of the second air outlet are installed, the second air outlet and the clean air pipe are mutually circulated, a fifth air valve is installed inside each of the second air outlets, and a clean air outlet is installed at the end of the clean air pipe.

7. The pressure swing adsorption (PSA) biogas purification equipment according to claim 6, characterized in that: An auxiliary exhaust pipe that is in communication with the second exhaust port is installed below the fifth air valve, and an auxiliary exhaust pipe is installed inside the auxiliary exhaust pipe. The auxiliary exhaust pipe and the main exhaust pipe are in communication with each other, and an exhaust gas treatment tower is installed at the end of the main exhaust pipe.

8. The pressure swing adsorption (PSA) biogas purification equipment according to claim 6, characterized in that: An air storage tank is installed at the end of the clean air outlet, and the air storage tank and the clean air outlet are in communication with each other.

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