Efficient supercritical carbon dioxide power generation device

Abstract

The utility model discloses an efficient supercritical carbon dioxide power generation device which comprises a protective shell, a heat exchanger is installed in the protective shell, one end of the heat exchanger is connected with a turbine, a maintenance mechanism is arranged at the bottom of the turbine, an exhaust mechanism is arranged at the top of the protective shell, and the maintenance mechanism comprises a fixed seat and a movable installation seat. And two guide sliding grooves and a driving groove are formed in the surface of the top of the fixing base, and a driving screw rod is rotationally connected into the driving groove. According to the efficient supercritical carbon dioxide power generation device, heat exchange and heating are conducted through the heat exchanger, then the turbine is pushed to do work for power generation, compared with an existing Brayton cycle, the compression link is omitted, the carbon dioxide pressure of an outlet of the turbine is reduced, the efficiency is remarkably improved, and under the same working condition, the power doing capacity of the technology is 6.5 times that of the Brayton cycle; and low-quality heat can be consumed, and the heat consumption is reduced by about 40% compared with a Brayton cycle.

Description

Technical Field

[0001] This utility model relates to the field of carbon dioxide power generation technology, specifically to a high-efficiency supercritical carbon dioxide power generation device. Background Technology

[0002] Supercritical carbon dioxide power generation systems are a type of power system that uses supercritical carbon dioxide as the working fluid to convert heat from a heat source into mechanical energy. The heat source can come from nuclear reactors, solar energy, geothermal energy, industrial waste heat, fossil fuel combustion, etc. In the current technology, the efficiency of supercritical carbon dioxide power generation devices is not ideal. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a high-efficiency supercritical carbon dioxide power generation device, which solves the problem that the efficiency of supercritical carbon dioxide power generation devices is not ideal.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a high-efficiency supercritical carbon dioxide power generation device, including a protective shell, a heat exchanger installed inside the protective shell, a turbine connected to one end of the heat exchanger, a maintenance mechanism at the bottom of the turbine, and an exhaust mechanism at the top of the protective shell.

[0005] The maintenance mechanism includes a fixed base and a movable mounting base. The top surface of the fixed base has two guide grooves and a drive groove. A drive screw is rotatably connected inside the drive groove. A drive motor is fixedly connected to the end of the drive screw. A connecting seat is threaded onto the drive screw. Two T-shaped guide seats are fixedly connected to the bottom of the movable mounting base. Two support seats are fixedly connected to the front end of the movable mounting base. A support hydraulic cylinder is fixedly connected to the top of each of the two support seats. A support plate is fixedly connected to the end of the output shaft of each support hydraulic cylinder.

[0006] Preferably, the fixing seat is fixedly installed on the bottom of the inner side of the protective shell, and the fixing seat is detachably connected to the protective shell, so that the fixing seat can be installed inside the protective shell and can be disassembled.

[0007] Preferably, the driving groove is disposed between two guide grooves, and the driving groove is slidably connected to the connecting seat. The top end of the connecting seat is fixedly connected to the movable mounting seat, so that the connecting seat can drive the movable mounting seat to move.

[0008] Preferably, the two guide grooves are matched with the T-shaped guide seat, and the movable mounting seat is slidably connected to the fixed seat through the T-shaped guide seat and the guide groove, so as to guide the movement of the movable mounting seat.

[0009] Preferably, the output shaft end of the supporting hydraulic cylinder passes through the support base and extends to the bottom of the support base. The output shaft end of the supporting hydraulic cylinder is detachably connected to the support plate, so that the supporting hydraulic cylinder can drive the support plate to move up and down and can replace the support plate.

[0010] Preferably, the exhaust mechanism includes multiple rotating plates, and an exhaust window is provided at the bottom of the protective shell. The multiple rotating plates are disposed inside the exhaust window, and a rotating shaft is fixedly connected to the end of each of the multiple rotating plates. A worm gear is fixedly connected to one end of each rotating shaft, and a worm is provided on one side of each of the multiple worm gears. An exhaust motor is fixedly connected to the end of the worm. The worm meshes with the multiple worm gears, and the worm is rotatably connected to the inner wall of the exhaust window. This allows carbon dioxide to be discharged during operation and the exhaust window to be closed when idle to prevent dust from entering.

[0011] This invention provides a highly efficient supercritical carbon dioxide power generation device. Compared with the prior art, it has the following advantages:

[0012] 1. This highly efficient supercritical carbon dioxide power generation device heats the carbon dioxide to 200-300℃ through a heat exchanger, and then drives a supercritical carbon dioxide turbine to generate electricity. Compared with the existing Brayton cycle, it saves the compression stage, reduces the carbon dioxide pressure at the turbine outlet, and significantly improves the efficiency of the supercritical carbon dioxide compressor. Under the same operating conditions, the power output of this technology is 6.5 times that of the Brayton cycle; it can consume low-quality heat, and the heat consumption is reduced by about 40% compared with the Brayton cycle.

[0013] 2. This high-efficiency supercritical carbon dioxide power generation device uses a drive motor to move the mobile mounting base, which in turn moves the turbine, removing the turbine from the protective casing. Then, a support hydraulic cylinder moves the support plate down to the ground to support the mobile mounting base, thus facilitating the maintenance and repair of the turbine and improving the convenience of maintenance.

[0014] 3. This high-efficiency supercritical carbon dioxide power generation device uses an exhaust motor to drive a rotating plate to open and close the exhaust window. It can release carbon dioxide during operation and close the exhaust window when idle to prevent dust from entering. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the maintenance mechanism structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure between the fixed base and the movable mounting base of this utility model;

[0018] Figure 4 This is a schematic diagram of the exhaust mechanism of this utility model.

[0019] In the diagram: 1. Protective shell; 2. Maintenance mechanism; 201. Fixed base; 202. Movable mounting base; 203. Guide groove; 204. Drive groove; 205. Drive screw; 206. Drive motor; 207. Connecting seat; 208. T-shaped guide seat; 209. Support seat; 210. Support hydraulic cylinder; 211. Support plate; 3. Heat exchanger; 4. Exhaust mechanism; 401. Rotating plate; 402. Rotating shaft; 403. Worm gear; 404. Worm; 405. Exhaust motor; 5. Turbine. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 This utility model provides a technical solution: a high-efficiency supercritical carbon dioxide power generation device, including a protective shell 1, a heat exchanger 3 installed inside the protective shell 1, a turbine 5 connected to one end of the heat exchanger 3, a maintenance mechanism 2 at the bottom of the turbine 5, and an exhaust mechanism 4 at the top of the protective shell 1. It utilizes -40℃, 5.2MPa high-pressure liquid carbon dioxide produced by low-temperature methanol washing as the working medium. This medium is pressurized to 10-30MPa and then reheated within the low-temperature methanol washing, transferring cooling energy to the low-temperature methanol washing. The 10-30MPa carbon dioxide then exits the low-temperature methanol washing. After alcohol washing, the temperature is heated to 200-300℃ by heat exchanger 3 with solar energy and / or low-grade heat from chemical plants. Then, it drives a supercritical carbon dioxide turbine 5 to generate electricity. The carbon dioxide pressure at the outlet of turbine 5 is atmospheric pressure and is discharged into the atmosphere. Compared with the existing Brayton cycle, this technology saves the compression stage and reduces the carbon dioxide pressure at the outlet of turbine 5, significantly improving the efficiency of the supercritical carbon dioxide compressor. Under the same operating conditions, the power output of this technology is 6.5 times that of the Brayton cycle. It can consume low-quality heat, and the heat consumption is reduced by about 40% compared with the Brayton cycle.

[0022] The maintenance mechanism 2 includes a fixed base 201 and a movable mounting base 202. The fixed base 201 is fixedly installed on the bottom inner side of the protective shell 1 and is detachably connected to the protective shell 1, allowing the fixed base 201 to be installed inside the protective shell 1 and to be disassembled. The top surface of the fixed base 201 has two guide grooves 203 and a drive groove 204. A drive screw 205 is rotatably connected inside the drive groove 204, and a drive motor 206 is fixedly connected to the end of the drive screw 205. A connecting seat 207 is threaded onto the drive screw 205. The drive groove 204 is located between the two guide grooves 203 and is slidably connected to the connecting seat 207. The top of the connecting seat 207 is fixedly connected to the movable mounting base 202, allowing the connecting seat 207 to drive the movable mounting base 202 to move. Two T-shaped guide seats 2 are fixedly connected to the bottom of the movable mounting base 202. 08. Two guide grooves 203 match the T-shaped guide seat 208. The movable mounting seat 202 is slidably connected to the fixed seat 201 through the T-shaped guide seat 208 and the guide grooves 203, so that the movement of the movable mounting seat 202 can be guided. Two support seats 209 are fixedly connected to the front end of the movable mounting seat 202. Support hydraulic cylinders 210 are fixedly connected to the top of the two support seats 209. Support plates 211 are fixedly connected to the output shaft end of the support hydraulic cylinders 210. The movable mounting seat 202 can be supported by the support hydraulic cylinders 210 and the support plates 211. The output shaft end of the support hydraulic cylinders 210 passes through the support seats 209 and extends to the bottom of the support seats 209. The output shaft end of the support hydraulic cylinders 210 is detachably connected to the support plates 211, so that the support hydraulic cylinders 210 can drive the support plates 211 to move up and down, and the support plates 211 can be replaced.

[0023] Please see Figure 1 and Figure 4 The exhaust mechanism 4 includes multiple rotating plates 401. An exhaust window is provided at the bottom of the protective shell 1. The multiple rotating plates 401 are located inside the exhaust window. A rotating shaft 402 is fixedly connected to the end of each rotating plate 401, allowing the rotating plates 401 to rotate. A worm gear 403 is fixedly connected to one end of the rotating shaft 402. A worm 404 is provided on one side of each worm gear 403. An exhaust motor 405 is fixedly connected to the end of the worm 404. The worm 404 meshes with the multiple worm gears 403 and is rotatably connected to the inner wall of the exhaust window. The exhaust motor 405 can drive the worm 404 to rotate, which in turn drives the multiple worm gears 403 to rotate. The rotation of the worm gears 403 drives the rotating shaft 402 to rotate, which in turn drives the rotating plates 401 to rotate, thus opening and closing the exhaust window. This allows carbon dioxide to be discharged during operation and the exhaust window to be closed when not in use to prevent dust from entering.

[0024] During operation, -40℃, 5.2MPa high-pressure liquid carbon dioxide produced by a low-temperature methanol wash is used as the working medium. This medium is pressurized to 10-30MPa and then reheated within the low-temperature methanol wash, transferring its cooling capacity to the wash. After leaving the low-temperature methanol wash, the 10-30MPa carbon dioxide is heated to 200-300℃ via heat exchanger 3, where it exchanges heat with solar energy and / or low-grade heat from the chemical plant. This heat then drives a supercritical carbon dioxide turbine 5 to generate electricity. The carbon dioxide outlet pressure of turbine 5 is atmospheric pressure, and it is discharged into the atmosphere. Compared to the existing Brayton cycle, this technology eliminates the compression stage, reduces the carbon dioxide outlet pressure of turbine 5, and significantly improves the efficiency of the supercritical carbon dioxide compressor. Under the same operating conditions, the working capacity of this technology is 6.5 times that of the Brayton cycle; it can consume low-quality heat, reducing heat consumption by approximately 40% compared to the Brayton cycle.

[0025] During maintenance, the drive motor 206 drives the drive screw 205 to rotate, which in turn moves the connecting seat 207. The movement of the connecting seat 207 then moves the movable mounting seat 202, which in turn moves the turbine 5, removing it from the protective shell 1. Then, the support hydraulic cylinder 210 moves the support plate 211 downwards, placing it on the ground to support the movable mounting seat 202. This facilitates maintenance and repair of the turbine 5, improving the ease of maintenance.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A high-efficiency supercritical carbon dioxide power generation device, comprising a protective shell (1), characterized in that: The protective shell (1) is equipped with a heat exchanger (3), one end of which is connected to a turbine (5). The turbine (5) has a maintenance mechanism (2) at the bottom and an exhaust mechanism (4) at the top. The maintenance mechanism (2) includes a fixed base (201) and a movable mounting base (202). The top surface of the fixed base (201) has two guide grooves (203) and a drive groove (204). A drive screw (205) is rotatably connected inside the drive groove (204). A drive motor (206) is fixedly connected to the end of the drive screw (205). A connecting seat (207) is threaded onto the drive screw (205). Two T-shaped guide seats (208) are fixedly connected to the bottom of the movable mounting base (202). Two support seats (209) are fixedly connected to the front end of the movable mounting base (202). A support hydraulic cylinder (210) is fixedly connected to the top of each of the two support seats (209). A support plate (211) is fixedly connected to the end of the output shaft of the support hydraulic cylinder (210).

2. The high-efficiency supercritical carbon dioxide power generation device according to claim 1, characterized in that: The fixing seat (201) is fixedly installed on the bottom of the inner side of the protective shell (1), and the fixing seat (201) is detachably connected to the protective shell (1).

3. The high-efficiency supercritical carbon dioxide power generation device according to claim 1, characterized in that: The driving groove (204) is disposed between two guide grooves (203), and the driving groove (204) is slidably connected to the connecting seat (207), and the top end of the connecting seat (207) is fixedly connected to the movable mounting seat (202).

4. The high-efficiency supercritical carbon dioxide power generation device according to claim 1, characterized in that: The two guide grooves (203) are matched with the T-shaped guide seat (208), and the movable mounting seat (202) is slidably connected to the fixed seat (201) through the T-shaped guide seat (208) and the guide grooves (203).

5. A high-efficiency supercritical carbon dioxide power generation device according to claim 1, characterized in that: The output shaft end of the supporting hydraulic cylinder (210) passes through the support base (209) and extends to the bottom of the support base (209). The output shaft end of the supporting hydraulic cylinder (210) is detachably connected to the support plate (211).

6. The high-efficiency supercritical carbon dioxide power generation device according to claim 1, characterized in that: The exhaust mechanism (4) includes multiple rotating plates (401), and the bottom of the protective shell (1) is provided with an exhaust window, with the multiple rotating plates (401) arranged inside the exhaust window.

7. A high-efficiency supercritical carbon dioxide power generation device according to claim 6, characterized in that: Each of the multiple rotating plates (401) is fixedly connected to a rotating shaft (402) at one end. A worm gear (403) is fixedly connected to one end of the rotating shaft (402). A worm (404) is provided on one side of each of the multiple worm gears (403). An exhaust motor (405) is fixedly connected to the end of the worm (404).

8. A high-efficiency supercritical carbon dioxide power generation device according to claim 7, characterized in that: The worm (404) meshes with a plurality of worm wheels (403), and the worm (404) is rotatably connected to the inner wall of the exhaust window.

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