Centrifugal turbine variable-frequency power generation device for compressed air energy storage and power generation system of centrifugal turbine variable-frequency power generation device

Abstract

The invention provides a centrifugal turbine frequency conversion power generation device for compressed air energy storage and a power generation system thereof.The centrifugal turbine frequency conversion power generation device comprises a shell, a turbine stator and a generator stator are fixed in the shell, a turbine rotor is rotationally matched with the interior of the turbine stator, and a generator rotor is rotationally matched with the interior of the generator stator; the generator rotor is fixedly connected with the turbine rotor, a plurality of stator blades are arranged in the turbine stator, a plurality of rotor blades are arranged on the peripheral side of the turbine rotor, the stator blades correspond to the rotor blades, and an air inlet head and an air outlet head are arranged on the two sides of the shell respectively. The overall length of the device can be reduced under the condition that the length of the rotor of the turbine is not changed, so that the turbine and the generator form an integrated structure, and use is more convenient; the turbine rotor, the turbine stator and the generator rotor can be cooled at the same time, heat conduction can be conducted, and therefore heat recovery is achieved; and the blown hot air can be recycled.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation devices, and in particular to a centrifugal turbine variable frequency power generation device for compressed air energy storage and a power generation system thereof. Background Art

[0002] With the increasing shortage of conventional energy and the growing prominence of environmental pollution, the utilization of renewable energy has become an urgent issue that needs to be addressed. In coal gasification combined cycle power generation systems, compressed air energy storage (CAES) is commonly used to store excess electricity. After pumped hydro storage, CAES is considered the second most suitable technology for GW-scale power storage. Its operating principle is that during periods of low electricity demand, electricity is used to compress air to high pressure and store it in caverns or pressure vessels, converting the electricity into the air's internal energy for storage. During peak electricity demand, the high-pressure air is released from the storage chamber to drive a turbine expander to generate electricity. As an important type of energy storage, CAES possesses unique advantages over other types of energy storage, such as pumped hydro and electrochemical storage, and has significant development potential. Compared with pumped storage, compressed air energy storage has a short construction period, relatively easy site selection, high eco-friendly environment, and few resettlement and demolition issues; compared with the currently more mature lithium battery energy storage, compressed air energy storage has a long life, many cycles, good safety, clean and pollution-free, and no system performance degradation. In addition, compressed air energy storage has frequency and voltage regulation performance similar to traditional thermal power, as well as rotational inertia and short-circuit current support, which is conducive to the safe and stable operation of the power system in the future with a high proportion of new energy scenarios. Most existing turbines and generators are two completely different units. The turbine rotor is driven by compressed air, and then the turbine rotor is connected to the generator rotor to drive the generator rotor to rotate to generate electricity. It usually takes up a large space, and when generating electricity, the hotter air is blown directly into the turbine, which easily forms condensation in the turbine. If not handled in time, the condensation may corrode the blades in the turbine, affecting the service life of the turbine. In addition, the turbine directly blows out the hotter air, which easily causes energy waste.

[0003] To this end, the present invention provides a centrifugal turbine variable frequency power generation device and a power generation system thereof for compressed air energy storage. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a centrifugal turbine variable frequency generator and its power generation system for compressed air energy storage, so as to solve the problems raised in the above background technology. The present invention can reduce the overall length of the device while ensuring that the length of the turbine rotor remains unchanged, so that the turbine and the generator form an integrated structure, which is more convenient to use; the turbine rotor, turbine stator and generator rotor can be dissipated at the same time, and heat can be conducted to achieve heat recovery; the blown hot air can be recovered to reduce energy waste, and the blown air can be blown back into the turbine after drying, thereby drying the turbine, and condensed water can be evaporated to prevent condensed water from corroding the rotor blades and stator blades.

[0005] In order to achieve the above-mentioned objectives, the present invention is implemented through the following technical solutions: a centrifugal turbine variable frequency power generation device for compressed air energy storage, comprising a shell, a turbine stator and a generator stator are fixed in the shell, a turbine rotor is rotatably matched in the turbine stator, a generator rotor is rotatably matched in the generator stator, the generator rotor is fixedly connected to the turbine rotor, a plurality of stator blades are installed in the turbine stator, a plurality of rotor blades are installed on the circumferential side of the turbine rotor, the stator blades correspond to the rotor blades, an air inlet head and an air outlet head are respectively installed on both sides of the shell, the air outlet head corresponds to the turbine rotor, a cooling water pipe is installed in the turbine stator, a water collecting tank is installed in the shell, the water collecting tank corresponds to the cooling water pipe, an air storage box is installed on the shell, the air storage box is connected to the air outlet head, the air storage box corresponds to the water collecting tank, an air supply structure is installed on one side of the air storage box, a drying structure is installed in the shell, the air supply structure corresponds to the drying structure, and the air supply structure and the drying structure correspond to the generator stator.

[0006] Furthermore, the turbine rotor includes a rotating shaft, a first fixed wheel and a first rotating wheel, the rotor blades are fixed between the first fixed wheel and the first rotating wheel, the first fixed wheel is fixedly connected to the rotating shaft, the first rotating wheel is rotatably connected to the turbine stator, a sleeve is fixed on the first rotating wheel at one end, the sleeve is rotatably connected to the air outlet, a plurality of second fixed wheels are fixed in the turbine stator, the second fixed wheel is fixedly connected to the stator blades, a second rotating wheel is fixed on the stator blades, and the second rotating wheel is rotatably connected to the rotating shaft.

[0007] Furthermore, a fixing plate is fixed between the sleeve and the generator rotor, the sleeve is rotatably connected to the outer casing and the air outlet, the turbine stator is fixedly connected to the air inlet, the air inlet is rotatably connected to the rotating shaft, a first air inlet is opened in the air inlet, and a first valve is installed in the first air inlet.

[0008] Furthermore, a cavity is opened in the turbine stator, and a cooling water pipe is fixed in the cavity. A water inlet pipe is fixed to one end of the cooling water pipe, and the water inlet pipe is fixedly connected to the outer shell. A connecting water pipe is installed at the other end of the cooling water pipe. The water outlet pipe and the water collecting tank are connected through the connecting water pipe, and the bottom of the water collecting tank is connected to the air storage tank.

[0009] Furthermore, an air outlet is provided on one side of the air inlet head, a second valve is installed in the air outlet, an air pipe is installed on one side of the air outlet, and one end of the air pipe is connected to the water collecting tank.

[0010] Furthermore, a water outlet pipe is fixed at the bottom of the water collecting tank, the water outlet pipe is connected to the air storage tank, a third valve is fixed in the water outlet pipe, connecting ports are opened at the top of the water collecting tank and the air storage tank, the top of the water collecting tank is connected to the air storage tank through the connecting ports, a downpipe is fixed at the bottom of the air storage tank, and a fourth valve is installed in the downpipe.

[0011] Furthermore, the air supply structure includes an air pump fixed to one side of the air storage box, the air inlet end of the air pump is connected to the air storage box, and the air outlet end of the air pump corresponds to the drying structure.

[0012] Furthermore, the drying structure includes a drying box fixed in the shell, a plurality of activated carbon plates are fixed in the drying box, and an air supply pipe is fixed between the air outlet end of the air pump and the drying box.

[0013] Furthermore, a second air inlet is provided on the turbine stator, the second air inlet is connected to the drying box, and a fifth valve is installed in the second air inlet.

[0014] A power generation system for compressed air energy storage includes a centrifugal turbine variable frequency power generation device, an air intake module is installed at the input end of the centrifugal turbine variable frequency power generation device, the air intake module includes a compressed air energy storage chamber and a compressed air heating expander, the centrifugal turbine variable frequency power generation device is connected to the centrifugal turbine variable frequency power generation device through the compressed air heating expander, and a frequency converter is installed at the output end of the centrifugal turbine variable frequency power generation device, and the centrifugal turbine variable frequency power generation device is connected to the power grid through the frequency converter.

[0015] Beneficial effects of the present invention: The present invention provides a centrifugal turbine variable frequency power generation device for compressed air energy storage and a power generation system thereof, comprising a generator rotor; a turbine rotor; a turbine stator; a cooling water pipe; an air storage box; an air supply structure; and a drying structure.

[0016] The generator rotor is fixedly connected to the turbine rotor, and the turbine stator is arranged on the relatively inner side of the generator rotor. This can reduce the overall length of the device while ensuring that the length of the turbine rotor remains unchanged, so that the turbine and generator form an integrated structure, which is more convenient to use. A cooling water pipe is installed in the turbine stator, which can dissipate heat from the turbine rotor, turbine stator and generator rotor at the same time, and can also conduct heat to achieve heat recovery. An air supply structure is installed on one side of the air storage box, and a drying structure is installed in the outer shell. The blown hot air can be recovered, thereby reducing energy waste. The blown air can be blown back into the turbine after drying, thereby drying the inside of the turbine, which can evaporate the condensed water to prevent the condensed water from corroding the rotor blades and stator blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall assembly structure of a centrifugal turbine variable frequency power generation device for compressed air energy storage according to the present invention; Figure 2 This is a schematic diagram of the overall assembly cross-sectional structure of a centrifugal turbine variable frequency power generation device for compressed air energy storage according to the present invention; Figure 3 for Figure 2 Schematic diagram at A in the middle; Figure 4 for Figure 2 Schematic diagram at point B in the middle; Figure 5 for Figure 2 Schematic diagram at C in the middle; Figure 6 This is a schematic diagram of the assembly structure of a centrifugal turbine variable frequency power generation device for compressed air energy storage and a turbine stator, a generator rotor, and a generator stator in its power generation system according to the present invention; Figure 7 This is a schematic diagram of the assembled three-dimensional structure of a centrifugal turbine variable frequency power generation device for compressed air energy storage and a power generation system thereof; Figure 8 This is a schematic diagram of the assembly structure of the stator blades in a centrifugal turbine variable frequency power generation device for compressed air energy storage and its power generation system according to the present invention; Figure 9 This is a schematic diagram of the assembled three-dimensional structure of a centrifugal turbine variable frequency power generation device for compressed air energy storage and a rotor blade in its power generation system according to the present invention; Figure 10 This is a schematic diagram of the assembly structure of a centrifugal turbine variable frequency power generation device for compressed air energy storage and a housing and an air storage tank in its power generation system according to the present invention; In the figure: 1, housing; 2, turbine rotor; 3, turbine stator; 4, generator rotor; 5, generator stator; 6, first fixed wheel; 7, first rotating wheel; 8, stator blades; 9, rotor blades; 10, second fixed wheel; 11, second rotating wheel; 12, air inlet; 13, first air inlet; 14, first valve; 15, second valve; 16, air pipe; 17, water inlet pipe; 18, cooling water pipe; 1 9. Water collecting tank; 20. Connecting water pipe; 21. Water outlet pipe; 22. Air storage tank; 23. Air pump; 24. Air supply pipe; 25. Drying box; 26. Activated carbon plate; 27. Second air inlet; 28. Third valve; 29. Fixed plate; 30. Rotating shaft; 32. Fourth valve; 32. Drain pipe; 33. Connecting port; 34. Fifth valve; 35. Air outlet; 36. Sleeve; 37. Air outlet; 38. Cavity. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] See also Figures 1 to 10 The present invention provides a technical solution: a centrifugal turbine variable frequency generator for compressed air energy storage and a power generation system thereof, comprising a housing 1, wherein a turbine stator 3 and a generator stator 5 are fixed in the housing 1, a turbine rotor 2 is rotatably fitted in the turbine stator 3, a generator rotor 4 is rotatably fitted in the generator stator 5, the generator rotor 4 is fixedly connected to the turbine rotor 2, a plurality of stator blades 8 are installed in the turbine stator 3, a plurality of rotor blades 9 are installed on the circumference of the turbine rotor 2, the stator blades 8 correspond to the rotor blades 9, and the housing 1 is provided with a plurality of stator blades 8. An air inlet 12 and an air outlet 35 are respectively installed on both sides, and the air outlet 35 corresponds to the turbine rotor 2. A cooling water pipe 18 is installed in the turbine stator 3, and a water collecting tank 19 is installed in the outer shell 1, and the water collecting tank 19 corresponds to the cooling water pipe 18. An air storage box 22 is installed on the outer shell 1, and the air storage box 22 is connected to the air outlet 35. The air storage box 22 corresponds to the water collecting tank 19. An air supply structure is installed on one side of the air storage box 22, and a drying structure is installed in the outer shell 1, and the air supply structure corresponds to the drying structure. The air supply structure and the drying structure correspond to the generator stator 5.

[0020] In this embodiment, the turbine rotor 2 includes a rotating shaft 30, a first fixed wheel 6 and a first rotating wheel 7. The rotor blades 9 are fixed between the first fixed wheel 6 and the first rotating wheel 7. The first fixed wheel 6 is fixedly connected to the rotating shaft 30. The first rotating wheel 7 is rotationally connected to the turbine stator 3. A sleeve 36 is fixed to the first rotating wheel 7 at one end. The sleeve 36 is rotationally connected to the air outlet 35. A plurality of second fixed wheels 10 are fixed in the turbine stator 3. The second fixed wheels 10 are fixedly connected to the stator blades 8. A second rotating wheel 11 is fixed to the stator blades 8. The second rotating wheel 11 is rotationally connected to the rotating shaft 30.

[0021] Specifically, the heated compressed air can be used to blow the rotor blades 9 to rotate, thereby driving the rotating shaft 30 to rotate. At this time, the rotor blades 9 and the stator blades 8 can play a guiding role, and the first fixed wheel 6 and the first rotating wheel 7 are respectively installed on both sides of the rotor blade 9, and the second fixed wheel 10 and the second rotating wheel 11 are respectively installed on both sides of the stator blade 8. This can reduce friction while ensuring the guiding effect, reduce energy waste, and reduce heat generated by friction.

[0022] A fixing plate 29 is fixed between the sleeve 36 and the generator rotor 4. The sleeve 36 is rotatably connected to the outer casing 1 and the air outlet 35. The turbine stator 3 is fixedly connected to the air inlet 12. The air inlet 12 is rotatably connected to the rotating shaft 30. A first air inlet 13 is provided in the air inlet 12, and a first valve 14 is installed in the first air inlet 13.

[0023] Specifically, the heated compressed air is blown into the first air inlet 13, and the first valve 14 is opened, so that the compressed air blows the rotor blades 9, thereby driving the rotating shaft 30 to rotate, so that the rotating shaft 30 drives the generator rotor 4 to rotate through the fixed plate 29, and power generation can be performed, and then the wind is blown out from the wind outlet 35.

[0024] A cavity 38 is provided in the turbine stator 3, and a cooling water pipe 18 is fixed in the cavity 38. A water inlet pipe 17 is fixed to one end of the cooling water pipe 18, and the water inlet pipe 17 is fixedly connected to the outer casing 1. A connecting water pipe 20 is installed at the other end of the cooling water pipe 18. The water outlet pipe 21 is connected to the water collecting tank 19 through the connecting water pipe 20, and the bottom of the water collecting tank 19 is connected to the air storage tank 22.

[0025] Specifically, the turbine rotor 2, the turbine stator 3 and the generator rotor 4 can be cooled through the cooling water pipe 18. When the turbine rotor 2 generates heat, it can be transferred to the turbine stator 3 through the first rotating wheel 7, thereby performing heat exchange through the cooling water pipe 18. Water is introduced into the cooling water pipe 18 through the water inlet pipe 17, and then flows into the water collecting tank 19 through the connecting water pipe 20. The walls of the water collecting tank 19 are coated with a thermal insulation coating, which can achieve a good thermal insulation effect, thereby recovering heat energy.

[0026] An air outlet 37 is provided on one side of the air inlet head 12, and a second valve 15 is installed in the air outlet 37. An air pipe 16 is installed on one side of the air outlet 37, and one end of the air pipe 16 is connected to the water collecting box 19. A water outlet pipe 21 is fixed to the bottom of the water collecting box 19, and the water outlet pipe 21 is connected to the air storage box 22. A third valve 28 is fixed in the water outlet pipe 21. A connecting port 33 is provided at the top of the water collecting box 19 and the air storage box 22. The top of the water collecting box 19 is connected to the air storage box 22 through the connecting port 33. A downpipe 32 is fixed to the bottom of the air storage box 22, and a fourth valve 31 is installed in the downpipe 32.

[0027] Specifically, the air blown out of the air outlet 37 can be blown into the water collecting tank 19 through the air pipe 16, and the hot air blown out of the air pipe 16 can be recovered by the water in the water collecting tank 19, and then blown into the air storage tank 22 through the connecting port 33. A blowing outlet can be opened at the top of the air storage tank 22, and a fifth valve can be installed in the blowing outlet to store the gas through the air storage tank 22. After opening the fifth valve, the gas can be blown out through the blowing outlet, and the third valve 28 and the fourth valve 31 can be opened at the same time to collect the hot water separately.

[0028] A connection port is opened on one side of the gas storage box 22, and a three-way valve can be installed at one end of the gas pipe 16. The gas pipe 16 is connected to the connection port through the three-way valve, so that the gas can be directly discharged to the outside or discharged into the gas storage box 22. The water in the water collecting tank 19 is heated to form steam and enters the gas storage box 22. After power generation is completed, it can be blown into the second air inlet 27 to generate electricity, thereby realizing energy recovery.

[0029] The air supply structure includes an air pump 23 fixed to one side of the air storage box 22. The air inlet end of the air pump 23 is connected to the air storage box 22, and the air outlet end of the air pump 23 corresponds to the drying structure. The drying structure includes a drying box 25 fixed in the outer shell 1. A plurality of activated carbon plates 26 are fixed in the drying box 25. An air supply pipe 24 is fixed between the air outlet end of the air pump 23 and the drying box 25. A second air inlet 27 is opened on the turbine stator 3. The second air inlet 27 is connected to the drying box 25. A fifth valve 34 is installed in the second air inlet 27.

[0030] Specifically, for the gas in the air storage box 22, after the compressed gas is blown out, the air pump 23 is started, so that the air pump 23 blows the gas in the air storage box 22 into the drying box 25, and then blows the gas into the second air inlet 27 after being dried by the activated carbon plate 26 in the drying box 25. Then, the fifth valve 34 is opened to blow the dried air toward the stator blades 8 and the rotor blades 9, so as to evaporate the condensed water on the surfaces of the stator blades 8 and the rotor blades 9.

[0031] A guide block may be installed in the second air inlet 27 to control the direction of wind blowing toward the stator blades 8 and the rotor blades 9. At a specific angle, the guide block may drive the rotor blades 9 to rotate, thereby generating electricity.

[0032] Working process: By blowing the heated compressed air into the first air inlet 13, opening the first valve 14, the compressed air blows the rotor blades 9, thereby driving the rotating shaft 30 to rotate, so that the rotating shaft 30 drives the generator rotor 4 to rotate through the fixed plate 29, thereby generating electricity. Then, the blown air is blown into the water collecting tank 19 or the air storage tank 22 through the air pipe 16 as needed; when the air blows into the water collecting tank 19, the cooling water pipe 18 cools the turbine rotor 2, the turbine stator 3 and the generator rotor 4. When the turbine rotor 2 generates heat, it can be transferred to the turbine stator 3 through the first rotating wheel 7, thereby performing heat exchange through the cooling water pipe 18. Water is introduced into the cooling water pipe 18 through the water inlet pipe 17, and then flows into the water collecting tank 19 through the connecting water pipe 20. At the same time, hot air is blown into the water collecting tank 19, thereby accelerating evaporation to form steam, so that the steam is blown into the air storage tank 22 through the connecting port 33. The steam can be stored in the air storage tank 22, and the steam can be directly sent out through the blowing port to connect to the steam generator for power generation, or directly stored in the air storage tank 22 for subsequent use; when the wind is blown directly into the air storage tank 22, the steam generated by heat exchange between the hot air and the cooling water pipe 18 can be stored in the air storage tank 22, and can be sent out through the blowing port to connect to the steam generator for power generation.

[0033] With respect to the steam stored in the air storage tank 22, after compressed air power generation is completed, the air pump 23 is started so that the air pump 23 delivers the steam in the air storage tank 22 into the second air inlet 27. The steam is then dried by the activated carbon plate 26 in the drying box 25 to reduce the water content in the steam. The fifth valve 34 is opened to allow the dry air to blow toward the stator blades 8 and the rotor blades 9. The dry air can evaporate the condensed water, and the blown air can then be directly discharged through the air pipe 16.

[0034] A power generation system for compressed air energy storage includes a centrifugal turbine variable frequency power generation device, an air intake module is installed at the input end of the centrifugal turbine variable frequency power generation device, the air intake module includes a compressed air energy storage chamber and a compressed air heating expander, the centrifugal turbine variable frequency power generation device is connected to the centrifugal turbine variable frequency power generation device through the compressed air heating expander, and a frequency converter is installed at the output end of the centrifugal turbine variable frequency power generation device, and the centrifugal turbine variable frequency power generation device is connected to the power grid through the frequency converter.

[0035] Specifically, the compressed air is stored in a compressed air energy storage chamber, heated by a compressed air heating expander, and then blown into a centrifugal turbine variable frequency generator to generate electricity. The generator stator 5 in the centrifugal turbine variable frequency generator is connected to the wiring terminal, the inverter is connected through the wiring terminal, and then the power grid is connected through the inverter, so that the electricity is incorporated into the power grid.

[0036] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A centrifugal turbine variable frequency power generation device for compressed air energy storage, comprising a housing (1), characterized in that: The housing (1) is provided with a turbine stator (3) and a generator stator (5). The turbine stator (3) is rotatably coupled with the turbine rotor (2). The generator stator (5) is rotatably coupled with the generator rotor (4). The generator rotor (4) is fixedly connected to the turbine rotor (2). A plurality of stator blades (8) are installed in the turbine stator (3). A plurality of rotor blades (9) are installed on the circumferential side of the turbine rotor (2). The stator blades (8) correspond to the rotor blades (9). An air inlet (12) and an air outlet (35) are respectively installed on both sides of the housing (1). The air outlet ( 35) corresponds to the turbine rotor (2), a cooling water pipe (18) is installed in the turbine stator (3), a water collecting tank (19) is installed in the housing (1), the water collecting tank (19) corresponds to the cooling water pipe (18), an air storage box (22) is installed on the housing (1), the air storage box (22) is connected to the air outlet (35), the air storage box (22) corresponds to the water collecting tank (19), an air supply structure is installed on one side of the air storage box (22), a drying structure is installed in the housing (1), the air supply structure corresponds to the drying structure, and the air supply structure and the drying structure correspond to the generator stator (5).

2. A centrifugal turbine variable frequency power generation device for compressed air energy storage according to claim 1, characterized in that: The turbine rotor (2) includes a rotating shaft (30), a first fixed wheel (6) and a first rotating wheel (7), a rotor blade (9) is fixed between the first fixed wheel (6) and the first rotating wheel (7), the first fixed wheel (6) is fixedly connected to the rotating shaft (30), the first rotating wheel (7) is rotatably connected to the turbine stator (3), a sleeve (36) is fixed on the first rotating wheel (7) at one end, the sleeve (36) is rotatably connected to the air outlet (35), a plurality of second fixed wheels (10) are fixed in the turbine stator (3), the second fixed wheels (10) are fixedly connected to the stator blades (8), a second rotating wheel (11) is fixed on the stator blades (8), and the second rotating wheel (11) is rotatably connected to the rotating shaft (30).

3. A centrifugal turbine variable frequency power generation device for compressed air energy storage according to claim 2, characterized in that: A fixing plate (29) is fixed between the sleeve (36) and the generator rotor (4), the sleeve (36) is rotatably connected to the housing (1) and the air outlet (35), the turbine stator (3) is fixedly connected to the air inlet (12), the air inlet (12) is rotatably connected to the rotating shaft (30), a first air inlet (13) is provided in the air inlet (12), and a first valve (14) is installed in the first air inlet (13).

4. The centrifugal turbine variable frequency power generation device for compressed air energy storage according to claim 1, characterized in that: A cavity (38) is provided in the turbine stator (3), a cooling water pipe (18) is fixed in the cavity (38), a water inlet pipe (17) is fixed to one end of the cooling water pipe (18), the water inlet pipe (17) is fixedly connected to the housing (1), a connecting water pipe (20) is installed at the other end of the cooling water pipe (18), a water outlet pipe (21) is connected to the water collecting tank (19) through the connecting water pipe (20), and the bottom of the water collecting tank (19) is connected to the air storage tank (22).

5. The centrifugal turbine variable frequency power generation device for compressed air energy storage according to claim 1, characterized in that: An air outlet (37) is provided on one side of the air inlet head (12), a second valve (15) is installed in the air outlet (37), an air pipe (16) is installed on one side of the air outlet (37), and one end of the air pipe (16) is connected to the water collecting tank (19).

6. The centrifugal turbine variable frequency power generation device for compressed air energy storage according to claim 1, characterized in that: A water outlet pipe (21) is fixed at the bottom of the water collecting box (19), the water outlet pipe (21) is connected to the air storage box (22), a third valve (28) is fixed in the water outlet pipe (21), a communication port (33) is opened at the top of the water collecting box (19) and the air storage box (22), the top of the water collecting box (19) and the air storage box (22) are connected through the communication port (33), a downpipe (32) is fixed at the bottom of the air storage box (22), and a fourth valve (31) is installed in the downpipe (32).

7. The centrifugal turbine variable frequency power generation device for compressed air energy storage according to claim 1, characterized in that: The air delivery structure comprises an air pump (23) fixed to one side of the air storage box (22), an air inlet end of the air pump (23) is connected to the air storage box (22), and an air outlet end of the air pump (23) corresponds to the drying structure.

8. A centrifugal turbine variable frequency power generation device for compressed air energy storage according to claim 7, characterized in that: The drying structure comprises a drying box (25) fixed in the housing (1), a plurality of activated carbon plates (26) are fixed in the drying box (25), and an air supply pipe (24) is fixed between the air outlet end of the air pump (23) and the drying box (25).

9. A centrifugal turbine variable frequency power generation device for compressed air energy storage according to claim 8, characterized in that: The turbine stator (3) is provided with a second air inlet (27), the second air inlet (27) is connected to the drying box (25), and a fifth valve (34) is installed in the second air inlet (27).

10. A power generation system for compressed air energy storage, comprising the centrifugal turbine variable frequency power generation device according to claim 1, characterized in that: The input end of the centrifugal turbine variable frequency generator is equipped with an air intake module, which includes a compressed air energy storage chamber and a compressed air heating expander. The centrifugal turbine variable frequency generator is connected to the centrifugal turbine variable frequency generator through the compressed air heating expander. The output end of the centrifugal turbine variable frequency generator is equipped with a frequency converter, and the centrifugal turbine variable frequency generator is connected to the power grid through the frequency converter.

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