A zero gas consumption PSA nitrogen generator recovery and energy saving system
By using the exhaust gas in the adsorption tower as the regenerated gas of the drying tower of the PSA nitrogen-making device, the problems of increased power consumption and poor regeneration capacity caused by the regenerated gas of the dryer from itself in the prior art are solved, and the effects of zero gas consumption and power saving are achieved.
Patent Information
- Application Number
- CN202510006361.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2045-01-03
AI Technical Summary
In the existing PSA nitrogen production device, the regeneration gas of the dryer is taken from its own internal body and needs to consume additional compressed air, resulting in increased power consumption, and the poor drying effect of the dryer will lead to poor regeneration capacity.
A zero-gas consumption PSA nitrogen production device recycling and energy-saving system is designed. By using the waste gas in the adsorption tower as the regeneration gas of the drying tower, the water absorption capacity of the molecular sieve in the adsorption tower is used to improve the regeneration effect of the desiccant and avoid additional consumption of compressed air.
It achieves zero consumption of regenerated gas, saves electricity, and improves the regeneration effect of the desiccant due to the drying of the regenerated gas.
Smart Images
Figure CN119406195B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of PSA nitrogen making devices, and in particular to a zero-gas-consumption PSA nitrogen making device recovery and energy-saving system. Background Art
[0002] In the PSA nitrogen production system, the raw air is first compressed by an air compressor and then processed by an air purification system. The air purification system usually includes components such as a dust collector, an oil remover and a drying tower. There are usually two groups of drying towers. The two groups of drying towers use desiccant adsorption and regeneration cycles to complete the drying of the air. The regeneration gas conventionally used for the dryer is taken from the inside of the dryer itself, which requires additional compressed air and increases power consumption. In addition, if the drying effect of the dryer itself is poor, the regeneration effect will be poor. Summary of the invention
[0003] In view of this, the purpose of the present invention is to propose a zero gas consumption PSA nitrogen production device recovery energy-saving system to solve the problem that the regeneration gas of the current dryer is taken from the inside of the dryer, which requires additional compressed air and leads to increased power consumption. In addition, if the drying effect of the dryer itself is poor, it will lead to poor regeneration effect.
[0004] Based on the above purpose, the present invention provides a zero gas consumption PSA nitrogen production device recovery energy-saving system, including a first drying tower, a second drying tower, a first adsorption tower and a second adsorption tower, and also includes: a first pipeline, a backflush tank, and a second pipeline, wherein:
[0005] The air inlets of the first drying tower and the second drying tower are connected to a third pipeline, and the air outlets are connected to a fourth pipeline, the first control valve and the second control valve are connected in series to the third pipeline, the fifth pipeline is connected in parallel to the third pipeline, the third control valve and the fourth control valve are connected in series to the fifth pipeline, the first exhaust pipe is connected to the fifth pipeline, the first exhaust pipe is located between the third control valve and the fourth control valve, the fifth control valve and the sixth control valve are connected in series to the fourth pipeline, the sixth pipeline is connected in parallel to the fourth pipeline, and the seventh control valve and the eighth control valve are connected in series to the sixth pipeline;
[0006] The first adsorption tower and the second adsorption tower are connected with a second exhaust pipe, one end of the first pipe is connected with the second exhaust pipe, the other end of the first pipe is connected with the air inlet of the blowback tank, one end of the second pipe is connected with the air outlet of the blowback tank, the other end of the second pipe is connected with the sixth pipe and is located between the seventh control valve and the eighth control valve, and the second pipe is connected in series with a ninth control valve;
[0007] The first drying tower and the second drying tower are both provided with an intermediate column, and the intermediate column is provided with a distribution part, and the distribution part is used to place the desiccant, wherein when the first drying tower or the second drying tower is in an adsorption state, the distribution part puts the desiccant in an aggregated state, and when the first drying tower or the second drying tower is in a regeneration state, the distribution part puts the desiccant in a dispersed state.
[0008] Optionally, an air heater is connected in series to the second pipeline. When one of the drying towers is undergoing a regeneration operation, the air heater is used to heat the regeneration gas flowing in the second pipeline during a predetermined time period of regeneration, and the regeneration gas is not heated during other time periods.
[0009] Optionally, the distribution part includes an annular platform arranged between the middle column and the first drying tower and the second drying tower body, the annular platform has a first horizontal section, a vertical section and a second horizontal section, the two ends of the vertical section are respectively connected to the first horizontal section and the second horizontal section to form a step shape, an annular moving net is slidably connected between the vertical section and the middle column, one end of the moving net close to the middle column is higher than the other end, the top of the moving net is used to place the desiccant, the bottom of the moving net is provided with a first driving part, the first driving part is used to drive the moving net to rise or fall, the top of the first horizontal section is provided with a first airbag, when the first airbag is inflated, a An inclined surface facing the central column, an annular baffle is slidably provided above the first horizontal section, a plurality of first air holes are distributed on the annular baffle, a second driving part is provided on the top of the annular baffle, and a plurality of second air holes are distributed on the second horizontal section. When the first drying tower or the second drying tower is in an adsorption state, the height of the moving net is lower than the first horizontal section, and the desiccant is located in the space formed by the baffle, the vertical section, the moving net and the middle column, and is in an aggregated state. When the first drying tower or the second drying tower is in a regeneration state, the height of the moving net is higher than the first horizontal section, and the desiccant is located in the space formed by the first horizontal section, the moving net and the middle column, and is in a dispersed state.
[0010] Optionally, a plurality of openings are distributed in an annular manner on the vertical section, and a second air bag is provided at the opening, and the desiccant on the moving net can be pushed to move upward by inflating the second air bag.
[0011] Optionally, temperature sensors are provided in the tower bodies of the first drying tower and the second drying tower. When the temperature sensor detects that a first temperature has been reached, the first temperature indicates that a required heating temperature has been reached, and the first driving unit drives the moving net to rise. When the temperature sensor detects that a second temperature has been reached, the second temperature indicates that the temperature of the regenerated gas has been restored to its original temperature. After a predetermined time has passed through the timer, the first driving unit drives the moving net to descend.
[0012] Optionally, the first driving part and the second driving part are electric cylinders or pneumatic cylinders.
[0013] Optionally, at least two groups of the distribution parts are arranged above and below.
[0014] During operation, when the first drying tower is in the adsorption state and the second drying tower is in the regeneration state, the first control valve, the fifth control valve, the ninth control valve, the eighth control valve and the fourth control valve are opened, and the other control valves are closed. When the second drying tower is regenerated, the exhaust gas in the adsorption tower is used as the regeneration gas, passes through the first pipeline, the backflush tank and the second pipeline, and enters the second drying tower through the eighth control valve to take away the moisture in the desiccant in the second drying tower, and regenerates the desiccant in the second drying tower. Then, the regenerated gas passes through the fourth control valve and is discharged through the first exhaust valve. When the first drying tower is in the regeneration state and the second drying tower is in the adsorption state, the second control valve, the sixth control valve, the ninth control valve, the seventh control valve and the third control valve are opened, and the other control valves are closed. When the first drying tower is regenerated, the exhaust gas in the adsorption tower is used as the regeneration gas, passes through the first pipeline, the backflush tank and the second pipeline, and enters the first drying tower through the seventh control valve to take away the moisture in the desiccant in the first drying tower, and regenerates the desiccant in the first drying tower. Then, the regenerated gas passes through the third control valve and is discharged through the first exhaust valve.
[0015] From the above, it can be seen that the present invention uses the waste gas in the adsorption tower as the regeneration gas of the drying tower. In addition to being able to separate nitrogen and oxygen, the molecular sieve in the adsorption tower also has a strong water absorption capacity. Therefore, when the waste gas in the adsorption tower is used as the regeneration gas of the drying tower, the water content of the regeneration gas is much lower than the water content of the compressed air at the outlet of the dryer. Therefore, the water absorption effect of the regeneration gas is better, and the moisture in the desiccant can be better taken away, thereby improving the regeneration effect of the desiccant. Therefore, the present invention does not need to consume additional compressed air as the regeneration gas, thereby achieving zero consumption of the regeneration gas and saving electric energy. At the same time, because the regeneration gas is drier, the regeneration effect of the desiccant is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 A schematic diagram of the structure of a recycling and energy-saving system according to an embodiment of the present invention;
[0018] Figure 2 This is a schematic diagram of the internal structure of the first drying tower in an embodiment of the present invention;
[0019] Figure 3 This is an enlarged view of the mobile network of an embodiment of the present invention;
[0020] Figure 4 It is a partial side view of the vertical section of an embodiment of the present invention.
[0021] The numbers in the figure are:
[0022] 1. The first drying tower; 2. The second drying tower; 3. The first adsorption tower; 4. The second adsorption tower; 5. The first pipeline; 6. The blowback tank; 7. The second pipeline; 8. The third pipeline; 9. The fourth pipeline; 10. The first control valve; 11. The second control valve; 12. The fifth pipeline; 13. The third control valve; 14. The fourth control valve; 15. The first exhaust pipe; 16. The fifth control valve; 17. The sixth control valve; 18. The sixth pipeline; 19. The seventh control valve; 20. The eighth control valve; 21. The second exhaust pipe; 22. The ninth control valve; 23. The middle column; 24. The annular platform; 25. The first horizontal section; 26. The vertical section; 27. The second horizontal section; 28. The moving net; 29. The first air bag; 30. The baffle; 31. The second air bag; 32. The desiccant; 33. The air heater. DETAILED DESCRIPTION
[0023] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.
[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0025] like Figure 1 and Figure 2 As shown, a zero gas consumption PSA nitrogen production device recovery energy-saving system includes a first drying tower 1, a second drying tower 2, a first adsorption tower 3 and a second adsorption tower 4, characterized in that it also includes: a first pipeline 5, a backflush tank 6, and a second pipeline 7, wherein:
[0026] The air inlets of the first drying tower 1 and the second drying tower 2 are connected to a third pipeline 8, and the air outlets are connected to a fourth pipeline 9. The third pipeline 8 is connected in series with a first control valve 10 and a second control valve 11. The third pipeline 8 is connected in parallel with a fifth pipeline 12. The fifth pipeline 12 is connected in series with a third control valve 13 and a fourth control valve 14. The fifth pipeline 12 is connected to a first exhaust pipe 15, and the first exhaust pipe 15 is located between the third control valve 13 and the fourth control valve 14. The fourth pipeline 9 is connected in series with a fifth control valve 16 and a sixth control valve 17. The fourth pipeline 9 is connected in parallel with a sixth pipeline 18, and the sixth pipeline 18 is connected in series with a seventh control valve 19 and an eighth control valve 20;
[0027] The first adsorption tower 3 and the second adsorption tower 4 are connected to the second exhaust pipe 21, one end of the first pipeline 5 is connected to the second exhaust pipe 21, the other end of the first pipeline 5 is connected to the air inlet of the back-blowing tank 6, one end of the second pipeline 7 is connected to the air outlet of the back-blowing tank 6, the other end of the second pipeline 7 is connected to the sixth pipeline 18, and is located between the seventh control valve 19 and the eighth control valve 20, and the second pipeline 7 is connected in series with a ninth control valve 22, and the switch of the control valve can be automatically realized by an existing control system.
[0028] The first drying tower 1 and the second drying tower 2 are both provided with an intermediate column 23, and the intermediate column 23 is provided with a distribution part, and the distribution part is used to place the desiccant 32, wherein when the first drying tower 1 or the second drying tower 2 is in an adsorption state, the distribution part makes the desiccant 32 in an aggregated state, and when the first drying tower 1 or the second drying tower 2 is in a regeneration state, the distribution part makes the desiccant 32 in a dispersed state.
[0029] During operation, when the first drying tower 1 is in the adsorption state and the second drying tower 2 is in the regeneration state, the first control valve 10, the fifth control valve 16, the ninth control valve 22, the eighth control valve 20 and the fourth control valve 14 are opened, and the other control valves are closed. When the second drying tower 2 is regenerated, the exhaust gas in the adsorption tower is used as the regeneration gas, passes through the first pipeline 5, the backflush tank 6 and the second pipeline 7, and enters the second drying tower 2 through the eighth control valve 20, takes away the moisture in the desiccant 32 in the second drying tower 2, and regenerates the desiccant 32 in the second drying tower 2. Then, the regenerated gas passes through the fourth control valve 14 and is discharged through the first exhaust valve. When the first drying tower 1 is in the regeneration state and the second drying tower 2 is in the adsorption state, the second control valve 11, the sixth control valve 17, the ninth control valve 22, the seventh control valve 19 and the third control valve 13 are opened, and the other control valves are closed. When the first drying tower 1 is regenerated, the exhaust gas in the adsorption tower is used as the regeneration gas, passes through the first pipeline 5, the backflush tank 6 and the second pipeline 7, and enters the first drying tower 1 through the seventh control valve 19, takes away the moisture in the desiccant 32 in the first drying tower 1, and regenerates the desiccant 32 in the first drying tower 1, and then the regenerated gas passes through the third control valve 13 and is discharged through the first exhaust valve.
[0030] As can be seen from the above, the present invention uses the waste gas in the adsorption tower as the regeneration gas of the drying tower. In addition to being able to separate nitrogen and oxygen, the molecular sieve in the adsorption tower also has a strong water absorption capacity. Therefore, when the waste gas in the adsorption tower is used as the regeneration gas of the drying tower, the water content of the regeneration gas is much lower than the water content of the compressed air at the outlet of the dryer. Therefore, the regeneration gas has a better water absorption effect and can better take away the moisture in the desiccant 32, thereby improving the regeneration effect of the desiccant 32. Therefore, the present invention does not need to consume additional compressed air as the regeneration gas, thereby achieving zero consumption of the regeneration gas and saving electric energy. At the same time, since the regeneration gas is drier, the regeneration effect of the desiccant 32 is improved.
[0031] In some embodiments, an air heater 33 is connected in series to the second pipeline 7. When one of the drying towers is undergoing a regeneration operation, the air heater 33 is used to heat the regeneration gas flowing in the second pipeline 7 during a predetermined time period of regeneration, and the regeneration gas is not heated during other time periods.
[0032] In the regeneration state, the moisture in the desiccant 32 can be further removed by heating the regeneration gas, thereby further improving the regeneration effect of the desiccant 32. The regeneration gas is not heated in other time periods in order to cool the desiccant 32 while regenerating, so as to facilitate the subsequent adjustment to the drying effect in the adsorption state.
[0033] During the adsorption operation, it is hoped that all the air passes through the desiccant 32 to ensure the drying effect. When the adsorbent is in a polymerized state, gaps can be avoided to ensure that all the air passes through the desiccant 32 for dehumidification. During the regeneration operation, it is hoped that the desiccant 32 is dispersed so that the regenerated gas can pass through the desiccant 32 more comprehensively and take away the moisture in the desiccant 32, thereby improving the regeneration effect of the desiccant 32. In order to achieve the above effect, Figure 2-Figure 3 As shown, in some embodiments, the distribution part includes an annular platform 24 arranged between the middle column 23 and the tower bodies of the first drying tower 1 and the second drying tower 2, the annular platform 24 has a first horizontal section 25, a vertical section 26 and a second horizontal section 27, the two ends of the vertical section 26 are respectively connected to the first horizontal section 25 and the second horizontal section 27 to form a step shape, an annular moving net 28 is slidably connected between the vertical section 26 and the middle column 23, one end of the moving net 28 close to the middle column 23 is higher than the other end, the top of the moving net 28 is used to place the desiccant 32, the bottom of the moving net 28 is provided with a first driving unit, the first driving unit is used to drive the moving net 28 to rise or fall, the top of the first horizontal section 25 is provided with a first airbag 29, when the first airbag 2 9 forms an inclined surface toward the central column when inflated, an annular baffle 30 is slidably provided above the first horizontal section 25, a plurality of first vents are distributed on the annular baffle 30, a second driving part is provided on the top of the annular baffle 30, a plurality of second vents are distributed on the second horizontal section 27, when the first drying tower 1 or the second drying tower 2 is in an adsorption state, at this time, the height of the moving net 28 is lower than the first horizontal section 25, the desiccant 32 is located in the space formed by the baffle 30, the vertical section 26, the moving net 28 and the middle column 23, and is in an aggregated state, when the first drying tower 1 or the second drying tower 2 is in a regeneration state, at this time, the height of the moving net 28 is higher than the first horizontal section 25, the desiccant 32 is located in the space formed by the first horizontal section 25, the moving net 28 and the middle column 23, and is in a dispersed state.
[0034] When the first drying tower 1 or the second drying tower 2 is in the adsorption state, the control system controls the first driving unit to drive the mobile net 28 to move downward, so that the height of the mobile net 28 is lower than the first horizontal section 25, and the first air bag 29 is inflated by the external inflation device to form an inclined surface, so that the desiccant 32 on the first horizontal section 25 falls into the mobile net 28, and the desiccant 32 is located in the space formed by the baffle 30, the vertical section 26, the mobile net 28 and the middle column 23. The desiccant 32 is covered by the baffle 30. Since the space is small at this time, the desiccant 32 will be in a polymerized state, which is beneficial to the drying effect. When the first drying tower 1 or the second drying tower 2 is in the regeneration state, the control system controls the first driving unit to drive the mobile net 28 to move upward, and the second driving unit drives the baffle 30 to move upward. At this time, the height of the mobile net 28 is higher than the first horizontal section 25, and the desiccant 32 is located in the space formed by the first horizontal section 25, the mobile net 28 and the middle column 23. At this time, due to the addition of the first horizontal section 25, the space is increased, so that the desiccant 32 is in a dispersed state, which is beneficial to the regeneration effect.
[0035] like Figure 4 As shown, in some embodiments, the vertical section 26 is provided with a plurality of openings in a ring shape, and a second air bag 31 is provided at the opening. The inflation of the second air bag 31 can push the desiccant 32 on the moving net 28 to move upward, so that the desiccant 32 can be more evenly distributed on the moving net 28.
[0036] In some embodiments, temperature sensors are provided in the tower bodies of the first drying tower 1 and the second drying tower 2. When the temperature sensor detects that a first temperature has been reached, the first temperature indicates that a required heating temperature has been reached, and the first driving unit drives the moving net 28 to rise. When the temperature sensor detects that a second temperature has been reached, the second temperature indicates that the temperature of the regenerated gas has been restored to its original temperature. After a predetermined time has passed through the timer, the first driving unit drives the moving net 28 to descend.
[0037] After the first temperature and the second temperature are detected by the temperature sensor, the first driving part is driven by the control system, so that when the mobile network 28 rises or falls to drive the desiccant 32 to roll, it is already at the required temperature. Therefore, the regeneration effect and cooling effect can be further improved through the rolling process at the required temperature. The design of the timer allows the desiccant 32 to cool for a period of time in a dispersed state and then polymerize.
[0038] In some embodiments, the first driving part and the second driving part are electric cylinders or pneumatic cylinders, and may also be other existing driving parts that can drive components to rise and fall.
[0039] In some embodiments, at least two groups of the distribution parts are provided above and below. By providing multiple groups of distribution parts and placing desiccant 32 on the distribution parts, the drying effect of the air can be further improved.
[0040] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the above aspects of the present invention, which are not provided in detail for the sake of simplicity.
[0041] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A zero-gas-consumption PSA nitrogen generator recovery and energy-saving system, comprising a first drying tower (1), a second drying tower (2), a first adsorption tower (3) and a second adsorption tower (4), characterized in that: Also includes: A first pipeline (5), a blowback tank (6), and a second pipeline (7), wherein: The air inlets of the first drying tower (1) and the second drying tower (2) are connected to a third pipeline (8), and the air outlets are connected to a fourth pipeline (9); the third pipeline (8) is connected in series with a first control valve (10) and a second control valve (11); the third pipeline (8) is connected in parallel with a fifth pipeline (12); the fifth pipeline (12) is connected in series with a third control valve (13) and a fourth control valve (14); the fifth pipeline (12) is connected in series with a first exhaust pipe (15); the first exhaust pipe (15) is located between the third control valve (13) and the fourth control valve (14); the fourth pipeline (9) is connected in series with a fifth control valve (16) and a sixth control valve (17); the fourth pipeline (9) is connected in parallel with a sixth pipeline (18); the sixth pipeline (18) is connected in series with a seventh control valve (19) and an eighth control valve (20); The first adsorption tower (3) and the second adsorption tower (4) are connected to a second exhaust pipe (21); one end of the first pipeline (5) is connected to the second exhaust pipe (21); the other end of the first pipeline (5) is connected to an air inlet of a back-blowing tank (6); one end of the second pipeline (7) is connected to an air outlet of the back-blowing tank (6); the other end of the second pipeline (7) is connected to a sixth pipeline (18) and is located between a seventh control valve (19) and an eighth control valve (20); and a ninth control valve (22) is connected in series to the second pipeline (7); The first drying tower (1) and the second drying tower (2) are both provided with an intermediate column (23), and the intermediate column (23) is provided with a distribution part, and the distribution part is used to place a desiccant (32), wherein when the first drying tower (1) or the second drying tower (2) is in an adsorption state, the distribution part makes the desiccant (32) in an aggregated state, and when the first drying tower (1) or the second drying tower (2) is in a regeneration state, the distribution part makes the desiccant (32) in a dispersed state; An air heater is connected in series to the second pipe (7). When one of the drying towers is regenerating, the air heater is used to heat the regeneration gas flowing in the second pipe (7) during a predetermined time period of regeneration, and does not heat the regeneration gas during other time periods. The distribution part comprises an annular platform (24) arranged between the intermediate column (23) and the tower bodies of the first drying tower (1) and the second drying tower (2); the annular platform (24) comprises a first horizontal section (25), a vertical section (26) and a second horizontal section (27); the two ends of the vertical section (26) are respectively connected to the first horizontal section (25) and the second horizontal section (27) to form a step shape; an annular moving net (28) is slidably connected between the vertical section (26) and the intermediate column (23); one end of the moving net (28) close to the intermediate column (23) is higher than the other end; a desiccant (32) is placed above the moving net (28); a first driving unit is arranged at the bottom of the moving net (28); the first driving unit is used to drive the moving net (28) to rise or fall; a first air bag (29) is arranged at the top of the first horizontal section (25); when the first air bag (29) is inflated, a desiccant (32) is placed above the moving net (28); The first horizontal section (25) is provided with an annular baffle (30) which is slidably disposed above the first horizontal section (25), and a plurality of first vent holes are distributed on the annular baffle (30). A second driving unit is disposed on the top of the annular baffle (30). A plurality of second vent holes are distributed on the second horizontal section (27). When the first drying tower (1) or the second drying tower (2) is in an adsorption state, the height of the moving net (28) is lower than that of the first horizontal section (25), and the desiccant (32) is located in a space formed by the baffle (30), the vertical section (26), the moving net (28) and the middle column (23), and is in an aggregated state. When the first drying tower (1) or the second drying tower (2) is in a regeneration state, the height of the moving net (28) is higher than that of the first horizontal section (25), and the desiccant (32) is located in a space formed by the first horizontal section (25), the moving net (28) and the middle column (23), and is in a dispersed state. The vertical section (26) is provided with a plurality of openings in an annular shape, and a second air bag (31) is provided at the opening, and the desiccant (32) on the moving net (28) can be pushed upward by inflating the second air bag (31); Temperature sensors are provided in the tower bodies of the first drying tower (1) and the second drying tower (2). When the temperature sensor detects that a first temperature has been reached, the first temperature indicates that a required heating temperature has been reached, and the first driving unit drives the moving net (28) to rise. When the temperature sensor detects that a second temperature has been reached, the second temperature indicates that the temperature of the regenerated gas has been restored to its original state. After a predetermined time has elapsed through a timer, the first driving unit drives the moving net (28) to descend. After the temperature sensor detects the first temperature and the second temperature, the control system drives the first driving unit again, so that the moving net (28) is at the required temperature during the process of rising or falling to drive the desiccant (32) to roll.
2. A zero gas consumption PSA nitrogen generator recovery and energy saving system according to claim 1, characterized in that: The first driving part and the second driving part are electric cylinders or pneumatic cylinders.
3. A zero gas consumption PSA nitrogen generator recovery and energy saving system according to claim 1, characterized in that: The distribution parts are provided with at least two groups in the upper and lower parts.
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