Compression heat regeneration zero-gas-consumption adsorption drying system coupled with power plant heat recovery system

Abstract

The application relates to a compression heat regeneration zero-gas-consumption adsorption drying system coupled with a power plant heat recovery system. The system efficiently utilizes low-grade heat energy of the power plant heat recovery system in the drying and regeneration processes of compressed air through the cooperation of an air inlet system, a working system, a regeneration system and a cooling system. The air inlet system delivers compressed air to a first gas-liquid separator, and the separated gas enters the working system to complete adsorption drying, and enters the regeneration system and the cooling system to realize zero-gas-consumption regeneration, and finally forms a closed loop. The system has the beneficial effect of fully utilizing power plant waste heat, significantly reducing the energy consumption of traditional drying technology, realizing zero-compressed-air consumption in the regeneration process, and achieving the purpose of energy saving and environmental protection.

Description

Technical Field

[0001] This application relates to the field of energy-saving system technology, and in particular to a compression heat regeneration zero-gas-consumption adsorption drying system coupled with a power plant regenerative system. Background Technology

[0002] Industrial gases, often referred to as the "blood" of industry, are a fundamental element of national economic development. Compressed air, as a crucial component of industrial gases, is widely used in power generation, chemical industry, and manufacturing. With advancements in industrial technology and increasingly stringent environmental requirements, the efficient treatment and energy-saving utilization of compressed air have become a focus of industry attention. Traditional compressed air drying technology typically employs adsorption dryers, but their regeneration process consumes large amounts of compressed air or external heat energy, resulting in low energy efficiency and high operating costs, which contradicts current energy conservation and emission reduction policies.

[0003] While existing compression heat regeneration drying technologies can partially utilize the compression heat of air compressors, the low grade of this heat often fails to meet the full energy requirements for desiccant regeneration. This necessitates additional consumption of compressed air or supplemental high-grade heat energy, thus failing to fundamentally solve the energy consumption problem. Furthermore, the cold blowing process in traditional technologies still consumes compressed air, further increasing energy waste.

[0004] To address the aforementioned issues, current technologies lack a solution that fully integrates power plant regenerative systems with compression heat regeneration drying technology. Power plant regenerative systems possess abundant low-grade thermal energy resources; effectively coupling them with compressed air drying systems can not only improve energy utilization efficiency but also achieve zero air consumption during the drying process. Therefore, developing a compression heat regeneration zero-air-consumption adsorption dryer technology coupled with a power plant regenerative system has significant practical implications and application value. Utility Model Content

[0005] Therefore, it is necessary to address the problems of high energy consumption and low regeneration efficiency of traditional compressed air drying technology by providing a zero-air-consumption adsorption drying system that is coupled with a power plant regenerative system.

[0006] A zero-gas-consumption adsorption drying system for compression heat regeneration coupled to a power plant regenerative system, the drying system comprising:

[0007] The air intake system is connected to the inlet of the first gas-liquid separator (4);

[0008] The working system is connected to the first gas-liquid separator (4) via a working pipeline (41);

[0009] The regeneration system and the cooling system are connected to the first gas-liquid separator (4) via processing pipelines (42), and the regeneration system and the cooling system are also connected to the working system.

[0010] In one embodiment, the intake system includes:

[0011] The first air compressor (1) is connected to the electric motor (3), and the first air compressor (1) is provided with an air inlet (11).

[0012] The second air compressor (2) is connected to the first air compressor (1) by a power source.

[0013] The first regenerator (10) and the second regenerator (20) are provided with a first steam inlet (101) and a first steam outlet (102).

[0014] The first regenerator (10) is located between the first air compressor (1) and the second air compressor (2), and the first regenerator (20) is located between the second air compressor (2) and the first gas-liquid separator (4).

[0015] In one embodiment, the drying system further includes:

[0016] The third regenerator (30) is installed on the processing pipeline (42). The third regenerator (30) has two inlets and two outlets, namely the first inlet (301), the second inlet (303), the first outlet (302), and the second outlet (304).

[0017] A working valve (410) is provided on the working pipeline (41), and a processing valve (420) is provided on the processing pipeline (42). The processing valve (420) is located between the first inlet (301) of the third regenerator and the first gas-liquid separator (4).

[0018] In one embodiment, the regeneration system includes:

[0019] The fourth regenerator (40) is provided with a fourth regenerator inlet (403) and a fourth regenerator outlet (404), and the fourth regenerator (40) is also provided with a second steam inlet (401) and a second steam outlet (402).

[0020] The fourth regenerator (40) is connected to the third regenerator (30) at the first outlet (302) of the third regenerator (30) via the fourth regenerator inlet (403), and a regeneration valve (305) is provided between the fourth regenerator inlet (403) and the third regenerator at the first outlet (302).

[0021] In one embodiment, the cooling system includes:

[0022] The fifth regenerator (50) is provided with a fifth regenerator inlet (503) and a fifth regenerator outlet (504), and the fifth regenerator (50) is also provided with a third steam inlet (501) and a third steam outlet (502).

[0023] The fifth regenerator (50) is connected to the third regenerator (30) at the first outlet (302) of the third regenerator (30) via the fifth regenerator inlet (503). A cooling valve (306) is provided between the fifth regenerator inlet (503) and the third regenerator at the first outlet (302).

[0024] In one embodiment, the drying system further includes:

[0025] The second gas-liquid separator (7) is disposed between the third regenerator (30) and the working system.

[0026] In one embodiment, the working system includes:

[0027] First working tower (5) and second working tower (6);

[0028] A valve system (8) is connected to the first working tower (5) and the second working tower (6).

[0029] In one embodiment, the valve system (8) includes:

[0030] The first valve group is provided with four valves, namely the first valve (801), the second valve (802), the third valve (803) and the fourth valve (804).

[0031] The second valve group has four valves: the fifth valve (805), the sixth valve (806), the seventh valve (807), and the eighth valve (808).

[0032] The valve system (8) is provided with eight inlets and outlets, namely A, B, C, D, E, F, G and H, which are connected to the first valve group and the first valve group.

[0033] In one embodiment, the valve system (8) is provided with a finished gas outlet pipeline (9).

[0034] In one embodiment, dew point analyzers are installed on the outlet pipe (51) of the first working tower and the outlet pipe (61) of the second working tower.

[0035] The aforementioned zero-air-consumption adsorption drying system, coupled with a power plant's regenerative system, delivers compressed air to a first gas-liquid separator via an intake system. After separation, the air is divided into a working system and a regeneration / cooling system. The working system is directly connected to the working tower via a working pipeline to complete the adsorption drying process. The regeneration and cooling systems utilize low-grade heat energy from the power plant's regenerative system to heat and regenerate the regeneration tower, respectively, and then cool it via processing pipelines. Finally, the regenerated gas is reintegrated into the working system. By integrating the heat energy of the power plant's regenerative steam, this system achieves zero compressed air consumption during the regeneration process, significantly reducing the energy consumption of traditional adsorption dryers. It solves the problems of low regeneration efficiency and severe energy waste in the prior art, meeting the technical requirements of green and energy-saving technologies. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a compression thermal regeneration zero-gas-consumption adsorption drying system coupled to a power plant regenerative system, provided as an embodiment of this application.

[0037] Reference numerals in the detailed embodiments:

[0038] 1. First air compressor; 2. Second air compressor; 3. Electric motor; 4. First gas-liquid separator; 5. First working tower; 6. Second working tower; 7. Second gas-liquid separator; 8. Valve system; 9. Finished gas outlet pipeline;

[0039] 11. Air inlet;

[0040] 10. First regenerator; 20. Second regenerator; 30. Third regenerator; 40. Fourth regenerator; 50. Fifth regenerator;

[0041] 100, First steam; 200, Second steam; 300, Third steam;

[0042] 101. First steam inlet; 102. First steam outlet;

[0043] 41. Working pipeline; 42. Processing pipeline;

[0044] 410. Working valve; 420. Processing valve;

[0045] 301. First inlet of the third regenerator; 302. First outlet of the third regenerator; 303. Second inlet of the third regenerator; 304. Second outlet of the third regenerator;

[0046] 305. Regeneration valve; 306. Cooling valve;

[0047] 401. Second steam inlet; 402. Second steam outlet; 403. Fourth regenerator inlet; 404. Fourth regenerator outlet;

[0048] 501. Third steam inlet; 502. Third steam outlet; 503. Fifth regenerator inlet; 504. Fifth regenerator outlet;

[0049] 801. First valve; 802. Second valve; 803. Third valve; 804. Fourth valve; 805. Fifth valve; 806. Sixth valve; 807. Seventh valve; 808. Eighth valve;

[0050] 51. Outlet pipeline of the first working tower; 61. Outlet pipeline of the second working tower;

[0051] A, A; B, B; C, C; D, D; E, E; F, F; G, G; H, H. Detailed Implementation

[0052] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0053] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0054] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0056] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0058] See Figure 1 , Figure 1This diagram illustrates a zero-gas-consumption adsorption drying system coupled to a power plant regenerative system, according to an embodiment of this application. The drying system provided in this embodiment includes an intake system, a working system, a regeneration system, and a cooling system. Specifically: the intake system is connected to the inlet of a first gas-liquid separator 4; the working system is connected to the first gas-liquid separator 4 via a working pipeline 41; the regeneration system and the cooling system are respectively connected to the first gas-liquid separator 4 via processing pipelines 42; and the regeneration system and the cooling system are also respectively connected to the working system.

[0059] The drying system of this application utilizes the low-grade heat energy of the power plant's regenerating system in the drying and regeneration process of compressed air through the coordinated operation of the air intake system, working system, regeneration system and cooling system. The air intake system delivers compressed air to the first gas-liquid separator 4. The separated gas enters the working system to complete adsorption drying, and enters the regeneration system and cooling system to achieve zero-air-consumption regeneration, ultimately forming a closed loop.

[0060] Continue to combine Figure 1 In this application, the air intake system includes: a first air compressor 1, a second air compressor 2, a first regenerator 10, and a second regenerator 20. The first air compressor 1 is connected to an electric motor 3 and has an air inlet 11. The second air compressor 2 is poweredly connected to the first air compressor 1. Both the first regenerator 10 and the second regenerator 20 have a first steam inlet 101 and a first steam outlet 102. The first regenerator 10 is located between the first air compressor 1 and the second air compressor 2, and the second regenerator 20 is located between the second air compressor 2 and the first gas-liquid separator 4.

[0061] In some embodiments of this application, the temperature of the first steam 100 is between 30°C and 40°C.

[0062] In this application, the air intake system operates as follows: Air first enters the system through the air inlet 11 of the first air compressor 1. After initial compression by the first air compressor 1, the temperature rises to approximately 80°C-90°C. Subsequently, the compressed air enters the first regenerator 10, where it exchanges heat with the first steam 100 from the power plant's regenerating system. The first steam 100 enters the first regenerator 10 through the first steam inlet 101, cooling the compressed air to approximately 50°C before returning to the power plant's thermal system from the first steam outlet 102.

[0063] The initially cooled compressed air continues to the second air compressor 2 for secondary compression, raising its temperature again to approximately 100°C. Then, the high-temperature air enters the second regenerator 20, where it exchanges heat again with the first steam 100, further cooling to 50°C-60°C before being sent to the first gas-liquid separator 4 for gas-liquid separation. Through the synergistic effect of two-stage compression and two-stage regeneration, the system not only optimizes the temperature control of the compressed air but also fully utilizes the low-grade waste heat from the power plant, effectively reducing energy consumption. Simultaneously, it provides a stable air source for subsequent adsorption drying and regeneration processes.

[0064] According to some embodiments of this application, the drying system further includes a third regenerator 30. The third regenerator 30 is disposed on the processing pipeline 42, and the third regenerator 30 has two inlets and two outlets, namely a first inlet 301, a second inlet 303, a first outlet 302, and a second outlet 304.

[0065] In some embodiments of this application, a working valve 410 is provided on the working pipeline 41, and a processing valve 420 is provided on the processing pipeline 42. The processing valve 420 is located between the first inlet 301 of the third regenerator and the first gas-liquid separator 4. During the operation of the drying system, both the working valve 410 and the processing valve 420 are opened simultaneously, with the working valve 410 having a larger opening. Only a small amount of compressed air passes through the processing valve 420 to the regeneration system or the cooling system. The working valve 410 regulates the flow rate of the working pipeline 41 to ensure the stable operation of the adsorption drying process; while the processing valve 420 controls the gas distribution ratio entering the regeneration / cooling system.

[0066] The third regenerator 30, as a heat exchange component, adopts a dual-inlet, dual-outlet structure, enabling it to simultaneously handle airflows from different pipelines and achieve efficient heat recovery and distribution. The first inlet 301 of the third regenerator is connected to the processing pipeline 42, receiving compressed air from the first gas-liquid separator 4; while the second inlet 303 of the third regenerator is connected to the regenerated or cooled return gas, forming a counter-current flow for heat exchange. This design allows the waste heat of the high-temperature return gas to preheat the low-temperature gas about to enter the regeneration system, thereby reducing the external heat energy requirement of the regeneration process.

[0067] According to some embodiments of this application, the regeneration system includes a fourth regenerator 40. The fourth regenerator 40 is provided with a fourth regenerator inlet 403 and a fourth regenerator outlet 404. Furthermore, the fourth regenerator 40 is also provided with a second steam inlet 401 and a second steam outlet 402. The fourth regenerator 40 is connected to the third regenerator 30's third regenerator first outlet 302 via the fourth regenerator inlet 403, and a regeneration valve 305 is provided between the fourth regenerator inlet 403 and the third regenerator first outlet 302.

[0068] In some embodiments of this application, the temperature of the second steam 200 is between 130°C and 190°C, and the pressure is between 1 MPa and 5 MPa. The second steam 200 enters the fourth regenerator 40 through the second steam inlet 401, and then returns to the thermal system through the second steam outlet 402.

[0069] In the regeneration system, the fourth regenerator 40 is designed to fully utilize the medium- and high-pressure steam resources provided by the power plant to achieve efficient regeneration of the working system. When the regeneration valve 305 is opened, compressed air from the third regenerator 30 enters the fourth regenerator 40 and undergoes thorough heat exchange with the second steam 200 at 130℃-190℃. Through the heating of the fourth regenerator 40, the temperature of the compressed air is rapidly increased to the operating temperature required for regeneration, and then it enters the working system to complete the regeneration.

[0070] According to some embodiments of this application, the cooling system includes a fifth regenerator 50. The fifth regenerator 50 is provided with a fifth regenerator inlet 503 and a fifth regenerator outlet 504. Furthermore, the fifth regenerator 50 is also provided with a third steam inlet 501 and a third steam outlet 502. The fifth regenerator 50 is connected to the first outlet 302 of the third regenerator 30 via the fifth regenerator inlet 503, and a cooling valve 306 is provided between the fifth regenerator inlet 503 and the first outlet 302 of the third regenerator.

[0071] In some embodiments of this application, the temperature of the third steam 300 is between 20°C and 30°C. The third steam 300 enters the fifth regenerator 50 through the third steam inlet 501 and then returns to the thermal system through the third steam outlet 502.

[0072] The cooling system achieves rapid cooling of the drying tower through the fifth regenerator 50, ensuring continuous and stable system operation. When the cooling valve 306 is opened, compressed air flows through the fifth regenerator 50 and exchanges heat with the third steam 300 at 20℃-30℃. The introduction of this low-temperature steam effectively lowers the temperature of the compressed air, bringing it to suitable operating conditions for adsorption drying. The cooling process not only shortens the switching time of the drying tower but also avoids potential damage to the adsorbent structure within the working system due to sudden temperature changes. The low-temperature characteristics of the third steam 300 make it particularly suitable for the cooling stage, and its heat source can be low-grade waste heat from the power plant or the cooling water system, further improving energy utilization efficiency.

[0073] In this application, the coordinated operation of the regeneration system and the cooling system enables the drying tower to efficiently switch between the regeneration and cooling stages. During regeneration, the regeneration valve 305 is open, and the cooling valve 306 is closed. During cooling, the regeneration valve 305 is closed, and the cooling valve 306 is open.

[0074] In some embodiments of this application, the drying system further includes a second gas-liquid separator 7, which is disposed between the third regenerator 30 and the working system. Because the second gas-liquid separator 7 is disposed between the third regenerator 30 and the working system, this arrangement can effectively intercept trace amounts of liquid water and impurities that may be carried in the gas after regeneration and cooling. This arrangement has dual advantages: on the one hand, it prevents moisture and contaminants from entering the working system and affecting the performance of the adsorbent; on the other hand, it avoids the accumulation of impurities within the system, which could lead to equipment corrosion or blockage.

[0075] According to some embodiments of this application, the working system includes a first working tower 5, a second working tower 6, and a valve system 8, wherein the valve system 8 is connected to the first working tower 5 and the second working tower 6. The first working tower 5 and the second working tower 6 achieve an alternating operation mode through the coordinated control of the valve system 8, ensuring the continuity and stability of the drying process.

[0076] In some embodiments of this application, the valve system 8 includes a first valve group and a second valve group. The first valve group has four valves: a first valve 801, a second valve 802, a third valve 803, and a fourth valve 804. The second valve group has four valves: a fifth valve 805, a sixth valve 806, a seventh valve 807, and an eighth valve 808. The valve system has eight inlets and outlets: A, B, C, D, E, F, G, and H, which connect the first valve group and the second valve group.

[0077] According to some embodiments of this application, port A is connected to the outlet 404 of the fourth regenerator, port B is connected to the second inlet 303 of the third regenerator, port C is connected to the outlet of the second gas-liquid separator 7, port E is connected to the inlet of the second working tower 6, port F is connected to the outlet of the second working tower 6, port G is connected to the inlet of the first working tower 5, and port H is connected to the outlet of the first working tower 5.

[0078] As the control component of the working system, valve system 8 can flexibly switch the roles of the first working tower 5 and the second working tower 6 by adjusting the opening and closing states of each valve, thereby optimizing the system's working efficiency. The design of valve system 8 fully considers the complexity of compressed air flow and the flexibility of system switching. It contains multiple valve groups that achieve precise control of the airflow path through different combinations. For example, when the first working tower 5 is in adsorption and drying mode, the second working tower 6 can perform regeneration or cooling operations, and vice versa. This dual-tower alternating operation mode not only improves the system's processing capacity but also avoids the downtime problems caused by the regeneration process in traditional single-tower systems, significantly improving overall operating efficiency.

[0079] In some embodiments of this application, the valve system 8 is equipped with a finished gas outlet pipeline 9. Port D is connected to the finished gas outlet pipeline 9. This pipeline, via port D, is connected to the entire system and is responsible for delivering high-quality compressed air, after adsorption and drying treatment, to the gas-consuming terminal. The pipeline is manufactured using high-pressure resistant and corrosion-resistant materials to ensure stable airtightness and structural strength during long-term operation. Furthermore, the finished gas outlet pipeline 9 also possesses good expandability and compatibility; its standardized interface design facilitates connection to different types of gas-consuming equipment or subsequent processing devices, meeting the needs of diverse industrial scenarios.

[0080] In some embodiments of this application, dew point analyzers are installed on the outlet pipe 51 of the first working tower 5 and the outlet pipe 61 of the second working tower 6. The dew point analyzers can monitor the dew point temperature of the compressed air in real time, ensuring it remains stable within the range required by the process. Through continuous data feedback, the system can dynamically adjust operating parameters; for example, when the dew point rises, the regeneration process is automatically triggered, thereby maintaining drying efficiency and avoiding energy waste. The data from the dew point analyzers can also be linked with the PLC control system, providing crucial information for the automatic switching between the two towers and ensuring the system is always in optimal operating condition.

[0081] Example 1

[0082] When the first working tower 5 is in the adsorption working state and the second working tower 6 is in the regeneration and cold blowing state, the system operation process is as follows:

[0083] After being compressed by the first air compressor 1, the air temperature rises to 80℃-90℃, and then enters the first regenerator 10, where it exchanges heat with the first steam 100 at 30℃-40℃, cooling down to approximately 50℃. After being compressed a second time by the second air compressor 2, the temperature rises again to approximately 100℃, and then enters the second regenerator 20 for further cooling to 50℃-60℃. The cooled compressed air then enters the first gas-liquid separator 4 for gas-liquid separation, removing liquid water.

[0084] At this time, both the working valve 410 and the processing valve 420 are open. Most of the compressed air enters the first working tower 5 through the working pipeline 41 for adsorption and drying. The dried gas is then tested for dew point by a dew point analyzer. If the dew point is qualified, it is supplied to the user through the finished gas outlet pipeline 9. During adsorption in the first working tower 5, the gas flow direction is: working valve 410 - fourth valve 804 - first working tower 5 - eighth valve 808 - finished gas outlet pipeline 9.

[0085] When processing valve 420 is open, a small amount of compressed air enters the third regenerator 30 through processing pipeline 42. When regeneration valve 305 is open and cooling valve 306 is closed, the compressed air enters the fourth regenerator 40 to exchange heat with the second steam 200 at 130℃-190℃, raising the temperature to the required regeneration temperature (usually 120℃-180℃). The high-temperature gas enters the second working tower 6, heating and regenerating the adsorbent inside, and the desorbed moisture is discharged with the gas flow. During this regeneration process, the gas flow direction is: processing valve 420 - third regenerator 30 - regeneration valve 305 - fourth regenerator 40 - first valve 801 - second working tower 6 - fifth valve 805 - third regenerator 30 - second gas-liquid separator 7 - fourth valve 804 - first working tower 5 - eighth valve 808 - finished gas outlet pipeline 9.

[0086] After regeneration is complete, regeneration valve 305 closes. At this time, cooling valve 306 opens, and compressed air enters the fifth regenerator 50, exchanging heat with the third steam 300 at 20℃-30℃, cooling it to a suitable temperature (approximately 30℃-50℃). The cooled gas enters the second working tower 6, lowering the adsorbent temperature and restoring its adsorption capacity, preparing it for the next cycle. During this cooling process, the gas flow is as follows: processing valve 420 - third regenerator 30 - cooling valve 306 - fifth regenerator 50 - first valve 801 - second working tower 6 - fifth valve 805 - third regenerator 30 - second gas-liquid separator 7 - fourth valve 804 - first working tower 5 - eighth valve 808 - finished gas outlet pipeline 9.

[0087] It should be noted that when the first working tower 5 is in adsorption mode and the second working tower 6 is in regeneration and cold blowing mode: the first valve 801, the fourth valve 804, the fifth valve 805, and the eighth valve 808 are open, while the second valve 802, the third valve 803, the sixth valve 806, and the seventh valve 807 are closed. The humid air discharged during regeneration and cold blowing enters the second gas-liquid separator 7. After removing condensate, some of the gas can be recycled back into the system, reducing gas consumption. When the first working tower 5 reaches adsorption saturation (dew point rises) or the second working tower 6 completes regeneration and cold blowing, the system can be switched, with the second working tower 6 becoming the working tower and the first working tower 5 entering the regeneration and cold blowing stage.

[0088] Example 2

[0089] When the second working tower 6 is in the adsorption working state, and the first working tower 5 is in the regeneration and cold blowing state, the system operation process is as follows:

[0090] After being compressed by the first air compressor 1, the air temperature rises to 80℃-90℃, and then enters the first regenerator 10, where it exchanges heat with the first steam 100 at 30℃-40℃, cooling down to approximately 50℃. After being compressed a second time by the second air compressor 2, the temperature rises again to approximately 100℃, and then enters the second regenerator 20 for further cooling to 50℃-60℃. The cooled compressed air then enters the first gas-liquid separator 4 for gas-liquid separation, removing liquid water.

[0091] At this time, both the working valve 410 and the processing valve 420 are open. Most of the compressed air enters the second working tower 6 through the working pipeline 41 for adsorption and drying. The dried gas is then tested for dew point by a dew point analyzer. If the dew point is qualified, it is supplied to the user through the finished gas outlet pipeline 9. During adsorption in the second working tower 6, the gas flow direction is: working valve 410 - third valve 803 - second working tower 6 - seventh valve 807 - finished gas outlet pipeline 9.

[0092] When processing valve 420 is open, a small amount of compressed air enters the third regenerator 30 through processing pipeline 42. When regeneration valve 305 is open and cooling valve 306 is closed, the compressed air enters the fourth regenerator 40 to exchange heat with the second steam 200 at 130℃-190℃, raising the temperature to the required regeneration temperature (typically 120℃-180℃). The high-temperature gas enters the first working tower 5 to heat and regenerate the adsorbent, and the desorbed moisture is discharged with the gas flow. During this regeneration process, the gas flow direction is: processing valve 420 - third regenerator 30 - regeneration valve 305 - fourth regenerator 40 - second valve 802 - first working tower 5 - sixth valve 806 - third regenerator 30 - second gas-liquid separator 7 - third valve 803 - second working tower 6 - seventh valve 807 - finished gas outlet pipeline 9.

[0093] After regeneration is complete, regeneration valve 305 closes. At this time, cooling valve 306 opens, and compressed air enters the fifth regenerator 50, where it exchanges heat with the third steam 300 at 20℃-30℃, cooling to a suitable temperature (approximately 30℃-50℃). The cooled gas then enters the first working tower 5, lowering the adsorbent temperature and restoring its adsorption capacity, preparing it for the next cycle. During this cooling process, the gas flow direction is: processing valve 420 - third regenerator 30 - cooling valve 306 - fifth regenerator 50 - second valve 802 - first working tower 5 - sixth valve 806 - third regenerator 30 - second gas-liquid separator 7 - third valve 803 - second working tower 6 - seventh valve 807 - finished gas outlet pipeline 9.

[0094] It should be noted that when the second working tower 6 is in adsorption mode and the first working tower 5 is in regeneration and cold blowing mode: the first valve 801, the fourth valve 804, the fifth valve 805, and the eighth valve 808 are closed, while the second valve 802, the third valve 803, the sixth valve 806, and the seventh valve 807 are open. The humid air discharged during regeneration and cold blowing enters the second gas-liquid separator 7. After removing condensate, some of the gas can be recycled back into the system, reducing gas consumption. When the second working tower 6 reaches adsorption saturation (dew point rises) or the first working tower 5 completes regeneration and cold blowing, the system can switch, with the first working tower 5 becoming the working tower and the second working tower 6 entering the regeneration and cold blowing stage.

[0095] The zero-air-consumption adsorption drying system for compressed air drying coupled with a power plant regenerative system, as provided in this application, achieves high efficiency, energy saving, and stable operation in the compressed air drying process through innovative structural design and heat energy utilization methods. The system organically combines the low-grade waste heat resources of the power plant regenerative system with the compressed air drying process, fully utilizing steam heat energy to complete the regeneration and cooling of the adsorbent. This completely eliminates the drawback of traditional drying technologies that require compressed air for regeneration, truly achieving zero-air-consumption operation. This coupled design not only significantly reduces energy consumption but also significantly improves the overall thermal efficiency of the system, making energy utilization more rational and economical.

[0096] Another significant advantage of this system lies in its control method and modular structural design. Through valve system regulation and real-time monitoring by a dew point analyzer, the system can automatically switch between dual-tower operating states, ensuring the continuity and stability of the drying process. Simultaneously, the coordinated operation of the multi-stage regenerator and gas-liquid separator effectively improves the quality of compressed air processing, ensuring that the dew point and pressure of the output gas remain within the required process range. The entire system is compact, reliable in operation, and easy to maintain, making it widely applicable in industrial sectors requiring high-quality compressed air, such as power generation, chemical engineering, and electronics.

[0097] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A zero-gas-consumption adsorption drying system for compression heat regeneration coupled to a power plant regenerative system, characterized in that, The drying system includes: The air intake system is connected to the inlet of the first gas-liquid separator (4); The working system is connected to the first gas-liquid separator (4) via a working pipeline (41); The regeneration system and the cooling system are connected to the first gas-liquid separator (4) via processing pipelines (42), and the regeneration system and the cooling system are also connected to the working system.

2. The zero-gas-consumption adsorption drying system for compression heat regeneration coupled to a power plant regenerative system according to claim 1, characterized in that, The intake system includes: The first air compressor (1) is connected to the electric motor (3), and the first air compressor (1) is provided with an air inlet (11). The second air compressor (2) is connected to the first air compressor (1) by a power source. The first regenerator (10) and the second regenerator (20) are provided with a first steam inlet (101) and a first steam outlet (102). The first regenerator (10) is located between the first air compressor (1) and the second air compressor (2), and the second regenerator (20) is located between the second air compressor (2) and the first gas-liquid separator (4).

3. The zero-gas-consumption adsorption drying system for compression heat regeneration coupled to a power plant regenerative system according to claim 1, characterized in that, The drying system also includes: The third regenerator (30) is installed on the processing pipeline (42). The third regenerator (30) has two inlets and two outlets, namely the first inlet (301), the second inlet (303), the first outlet (302), and the second outlet (304). A working valve (410) is provided on the working pipeline (41), and a processing valve (420) is provided on the processing pipeline (42). The processing valve (420) is located between the first inlet (301) of the third regenerator and the first gas-liquid separator (4).

4. The zero-gas-consumption adsorption drying system for compression heat regeneration coupled to a power plant regenerative system according to claim 3, characterized in that, The regeneration system includes: The fourth regenerator (40) is provided with a fourth regenerator inlet (403) and a fourth regenerator outlet (404), and the fourth regenerator (40) is also provided with a second steam inlet (401) and a second steam outlet (402). The fourth regenerator (40) is connected to the third regenerator (30) at the first outlet (302) of the third regenerator (30) via the fourth regenerator inlet (403), and a regeneration valve (305) is provided between the fourth regenerator inlet (403) and the third regenerator at the first outlet (302).

5. The zero-gas-consumption adsorption drying system for compression heat regeneration coupled to a power plant regenerative system according to claim 4, characterized in that, The cooling system includes: The fifth regenerator (50) is provided with a fifth regenerator inlet (503) and a fifth regenerator outlet (504), and the fifth regenerator (50) is also provided with a third steam inlet (501) and a third steam outlet (502). The fifth regenerator (50) is connected to the third regenerator (30) at the first outlet (302) of the third regenerator (30) via the fifth regenerator inlet (503). A cooling valve (306) is provided between the fifth regenerator inlet (503) and the third regenerator at the first outlet (302).

6. The zero-gas-consumption adsorption drying system for compression heat regeneration coupled to a power plant regenerative system according to claim 3, characterized in that, The drying system also includes: The second gas-liquid separator (7) is disposed between the third regenerator (30) and the working system.

7. The zero-gas-consumption adsorption drying system for compression heat regeneration coupled to a power plant regenerative system according to claim 5, characterized in that, The working system includes: First working tower (5) and second working tower (6); A valve system (8) is connected to the first working tower (5) and the second working tower (6).

8. The zero-gas-consumption adsorption drying system for compression heat regeneration coupled to a power plant regenerative system according to claim 7, characterized in that, The valve system (8) includes: The first valve group is provided with four valves, namely the first valve (801), the second valve (802), the third valve (803) and the fourth valve (804). The second valve group has four valves: the fifth valve (805), the sixth valve (806), the seventh valve (807), and the eighth valve (808). The valve system (8) is provided with eight inlets and outlets, namely A, B, C, D, E, F, G and H, which are connected to the first valve group and the first valve group.

9. The zero-gas-consumption adsorption drying system for compression heat regeneration coupled to a power plant regenerative system according to claim 7, characterized in that, The valve system (8) is equipped with a finished gas outlet pipeline (9).

10. The zero-gas-consumption adsorption drying system coupled to a power plant regenerative system according to claim 7, characterized in that, Dew point analyzers are installed on the outlet pipe (51) of the first working tower and the outlet pipe (61) of the second working tower.

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