A winter antifreeze and wind energy recovery system for indirect air-cooled power plants

Abstract

The present invention discloses a winter antifreeze and wind energy recovery system for an indirect air-cooled power station. The system comprises a natural ventilation indirect air-cooling tower, an air-cooling radiator mounted at the tower's air inlet, and a track disposed around the tower. Several automatic travel mechanisms are mounted on the track, and a wind power generator is mounted on each of the automatic travel mechanisms. By disposing the wind power generator around the cooling tower's air inlet, the present invention increases wind resistance at the cooling tower's air inlet, thereby reducing wind speed at the cooling tower's air inlet and, in turn, reducing the heat exchange capacity of the air-cooling radiator, thereby achieving the purpose of preventing the air-cooling radiator from freezing.

Description

Technical Field

[0001] The invention relates to a winter antifreeze and wind energy recovery system for an indirect air-cooled power station, belonging to the technical field of hyperbolic cooling towers in thermal power plants. Background Art

[0002] Circulating water natural ventilation cooling towers in thermal and nuclear power plants are large, thin-shell structures. To conserve water, power plants located in water-scarce areas require a circulating cooling water system that cools and reuses the hot water discharged from the cooler. Large power plants typically utilize hyperbolic cooling towers. This type of cooling tower is often used in inland power plants with limited access to water.

[0003] Indirect air cooling technology is widely used in arid inland areas of my country due to its significant water-saving advantages. However, in winter, the air cooling capacity exceeds the circulating water heat load, which can easily cause freezing of the finned tubes in indirect cooling radiators. Closing the louvers at the radiator inlet is a common method to reduce cooling air flow and heat exchange to prevent freezing. However, reducing cooling air flow does not reduce cooling air velocity, resulting in less than ideal antifreeze effects. Summary of the Invention

[0004] The purpose of the present invention is to provide a winter antifreeze and wind energy recovery system for an indirect air-cooled power station. By arranging a wind power generation device on the periphery of the cooling tower air inlet, the wind resistance of the cooling tower air inlet is increased, thereby reducing the wind speed at the cooling tower air inlet, and then reducing the heat exchange of the air-cooled radiator, thereby achieving the purpose of antifreeze of the air-cooled radiator.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A winter antifreeze and wind energy recovery system for an indirect air-cooled power station includes a natural ventilation indirect air-cooling tower, an air-cooling radiator is installed at the air inlet of the natural ventilation indirect air-cooling tower, a track is provided on the periphery of the natural ventilation indirect air-cooling tower, a plurality of automatic traveling mechanisms are provided on the track, and a wind power generation device is installed on the automatic traveling mechanism.

[0007] In the aforementioned winter antifreeze and wind energy recovery system for an indirect air-cooled power station, the wind turbine generator comprises a support column, a generator body, and blades. The lower end of the support column is fixedly mounted on an automatic propulsion mechanism, the generator body is mounted on the top of the support column, and the blades are mounted on the horizontally disposed rotating shaft of the generator body. The blades are made of fiberglass or aluminum alloy.

[0008] In the aforementioned winter antifreeze and wind energy recovery system for an indirect air-cooled power station, the natural ventilation indirect air-cooling tower includes an air-cooling tower body and a bottom support, the air-cooling tower body is installed on the bottom support, and the top height of the blade is lower than the top height of the air-cooled radiator.

[0009] In the aforementioned winter antifreeze and wind energy recovery system for an indirect air-cooled power station, this system adopts the following control method: in winter operating conditions, the wind resistance at the air inlet of the natural ventilation indirect air-cooling tower is increased through a wind power generation device, the wind speed blowing to the air-cooled radiator is reduced, the heat exchange amount of the air-cooled radiator is reduced, and the cooling water in the air-cooled radiator is prevented from freezing.

[0010] In the aforementioned winter antifreeze and wind energy recovery system for an indirect air-cooled power station, the control method of this system also includes the following contents: in non-winter working conditions, the rotating shaft of the generator body is locked by the wind turbine gearbox locking device of the wind power generation device, so that the blades remain stationary, thereby reducing the impact of the wind power generation device on the internal flow field of the natural ventilation indirect air-cooling tower, reducing the wind resistance at the air inlet of the natural ventilation indirect air-cooling tower, increasing the wind speed blowing to the air-cooled radiator, and increasing the heat exchange capacity of the air-cooled radiator.

[0011] In the aforementioned winter antifreeze and wind energy recovery system for an indirect air-cooled power station, the control method of this system also includes the following contents: in winter operating conditions, the inlet wind speed of the natural ventilation indirect air-cooling tower is first detected, and then the wind turbine is dragged along the track to a position with higher inlet wind speed through the automatic walking mechanism; in non-winter operating conditions, the inlet wind speed of the natural ventilation indirect air-cooling tower is first detected, and then the wind turbine is dragged along the track to a position with lower inlet wind speed through the automatic walking mechanism.

[0012] Compared with the prior art, the present invention increases the wind resistance of the cooling tower air inlet by arranging a wind power generation device outside the cooling tower air inlet, thereby reducing the wind speed at the cooling tower air inlet, and further reducing the heat exchange of the air-cooled radiator, thereby achieving the purpose of both recovering wind energy and preventing the air-cooled radiator from freezing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0014] Figure 2 It is a schematic diagram of the layout of the wind power generation device;

[0015] Figure 3 It is a top view of the present invention.

[0016] Figure numerals: 1-natural ventilation indirect air cooling tower, 2-air cooling radiator, 3-wind power generation device, 4-automatic walking mechanism, 5-track.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0018] Embodiment 1 of the present invention: A winter antifreeze and wind energy recovery system for an indirect air-cooled power station, comprising a natural ventilation indirect air-cooling tower 1, an air-cooling radiator 2 being installed at the air inlet of the natural ventilation indirect air-cooling tower 1, a track 5 being provided on the periphery of the natural ventilation indirect air-cooling tower 1, a plurality of automatic walking mechanisms 4 being provided on the track 5, and a wind power generation device 3 being installed on the automatic walking mechanism 4.

[0019] Example 2: A winter antifreeze and wind energy recovery system for an indirect air-cooled power station, comprising a natural ventilation indirect air-cooling tower 1, an air-cooling radiator 2 being installed at the air inlet of the natural ventilation indirect air-cooling tower 1, a track 5 being provided on the periphery of the natural ventilation indirect air-cooling tower 1, a plurality of automatic walking mechanisms 4 being provided on the track 5, and a wind power generation device 3 being installed on the automatic walking mechanism 4.

[0020] The wind turbine generator 3 includes a support column, a generator body, and blades. The lower end of the support column is fixedly mounted on the automatic travel mechanism 4. The generator body is mounted on the top of the support column. The blades are mounted on the rotating shaft of the generator body, and the rotating shaft of the generator body is arranged horizontally. The natural ventilation indirect air-cooling tower 1 includes an air-cooling tower body and a bottom support. The air-cooling tower body is mounted on the bottom support. The top height of the blades is lower than the top height of the air-cooling radiator 2.

[0021] This system adopts the following control method:

[0022] Under winter operating conditions, the wind speed at the air inlet of the natural ventilation indirect air-cooling tower 1 is first detected, and then the wind turbine 3 is dragged along the track 5 by the automatic walking mechanism 4 to a position where the wind speed is higher; the wind resistance at the air inlet of the natural ventilation indirect air-cooling tower 1 is increased by the wind turbine 3, the wind speed blowing to the air-cooling radiator 2 is reduced, the heat exchange amount of the air-cooling radiator 2 is reduced, and the cooling water in the air-cooling radiator 2 is prevented from freezing.

[0023] During non-winter operating conditions, the wind speed at the inlet of the natural ventilation indirect air-cooling tower 1 is first detected. The wind turbine 3 is then dragged along the track 5 via the automatic travel mechanism 4 to a position with lower wind speed. The rotating shaft of the generator body is locked by the wind turbine gearbox locking device of the wind turbine 3, keeping the blades stationary. This reduces the impact of the wind turbine 3 on the flow field within the natural ventilation indirect air-cooling tower 1, reduces wind resistance at the inlet of the natural ventilation indirect air-cooling tower 1, increases the wind speed toward the air-cooling radiator 2, and enhances the heat exchange capacity of the air-cooling radiator 2. Depending on the size of the indirect cooling tower, the rated power generation capacity of the vertical axis fan generator ranges from approximately 500kW to 1000kW. For a typical 660MW unit, this system can achieve frost protection for the air-cooling radiator and generate an annual power generation benefit of approximately 300,000 yuan.

Claims

1. A winter antifreeze and wind energy recovery system for an indirect air-cooling power station, comprising a natural ventilation indirect air-cooling tower (1), an air-cooling radiator (2) being installed at the air inlet of the natural ventilation indirect air-cooling tower (1), characterized in that: A track (5) is provided on the periphery of the natural ventilation indirect air cooling tower (1), a plurality of automatic travel mechanisms (4) are provided on the track (5), and a wind power generation device (3) is installed on the automatic travel mechanism (4); The wind power generation device (3) comprises a support column, a generator body and blades, the lower end of the support column is fixedly mounted on an automatic walking mechanism (4), the generator body is mounted on the top of the support column, and the blades are mounted on the rotating shaft of the generator body, and the rotating shaft of the generator body is arranged horizontally; The natural ventilation indirect air cooling tower (1) comprises an air cooling tower body and a bottom support, the air cooling tower body is mounted on the bottom support, and the top height of the blades is lower than the top height of the air cooling radiator (2); The system adopts the following control method: in winter working conditions, the wind resistance at the air inlet of the natural ventilation indirect air cooling tower (1) is increased by the wind power generation device (3), the wind speed blowing to the air cooling radiator (2) is reduced, the heat exchange amount of the air cooling radiator (2) is reduced, and the cooling water in the air cooling radiator (2) is prevented from freezing; In non-winter working conditions, the rotating shaft of the generator body is locked by the wind turbine gearbox locking device of the wind power generation device (3), so that the blades remain stationary, thereby reducing the influence of the wind power generation device (3) on the internal flow field of the natural ventilation indirect air cooling tower (1), reducing the wind resistance at the air inlet of the natural ventilation indirect air cooling tower (1), increasing the wind speed blowing to the air cooling radiator (2), and increasing the heat exchange capacity of the air cooling radiator (2); In winter working conditions, the wind speed at the air inlet of the natural ventilation indirect air cooling tower (1) is first detected, and then the wind power generation device (3) is dragged along the track (5) to a position with a higher wind speed via the automatic walking mechanism (4); in non-winter working conditions, the wind speed at the air inlet of the natural ventilation indirect air cooling tower (1) is first detected, and then the wind power generation device (3) is dragged along the track (5) to a position with a lower wind speed via the automatic walking mechanism (4).

Images