Hydrogen-cooled generator set shaft end fire danger monitoring and fire extinguishing system

Abstract

A hydrogen-cooled generator set shaft end fire danger monitoring and fire extinguishing system comprises a generator set shaft end and a fire danger monitoring and fire extinguishing system. The fire danger monitoring and fire extinguishing system comprises a monitoring module, a control module and a fire extinguishing module. The monitoring module monitors fire danger and feeds back a data signal to the control module; the control module receives the data signal from the monitoring module, analyzes the data signal to generate feedback data, confirms the range and the type of fire danger, forms a processing measure and sends a control signal to the fire extinguishing module; the fire extinguishing module receives the control signal from the control module and performs fire extinguishing treatment; the fire extinguishing module comprises a gas fire extinguishing device, a foam fire extinguishing device and a fire-fighting water spraying fire extinguishing device which jointly form a three-stage fire extinguishing measure, the shaft end fire danger of the generator set can be rapidly controlled and eliminated, economic losses are reduced, and personnel safety is protected.

Description

Technical Field

[0001] The present invention belongs to the technical field of fire prevention and control of generator sets, and in particular relates to a shaft end fire risk monitoring and fire extinguishing system for hydrogen-cooled generator sets. Background Art

[0002] At a time when the global energy landscape is accelerating its transition to clean energy and environmental protection standards are becoming increasingly stringent, hydrogen-cooled generators continue to expand their application in the power industry due to their significant advantages of high efficiency, energy saving, cleanliness and environmental protection. However, with the deepening of their application, the potential safety hazards of hydrogen-cooled generators have gradually become prominent, among which the hydrogen leakage problem and the fire risk it causes have become the key factors restricting the safe, stable, economical and efficient operation of hydrogen-cooled generator sets.

[0003] At present, hydrogen-cooled generator sets in operation have not formulated special fire safety designs for fires in the generator shaft end hydrogen system and the turbine shaft end oil system during the design phase, and lack automatic fire extinguishing devices to deal with fires caused by hydrogen leakage at the shaft end. Affected by complex operating conditions such as frequent deep peak regulation and overspeed tests, hydrogen-cooled generator sets in many power plants have experienced shaft end fire accidents, causing serious equipment damage and economic losses, and having a significant impact on the stability of power supply.

[0004] The existing generator fire extinguishing system is monitored by measuring the ambient temperature and conducting personnel inspections, and is controlled by on-duty patrol personnel who activate the alarm and take fire extinguishing measures on the spot after discovering a fire. It is not possible to detect and deal with fires that occur irregularly in a timely manner. The concentration of hydrogen leakage from the generator shaft end is easily diluted by ambient air. The existing equipment cannot monitor hydrogen leakage from the generator shaft end in a timely and effective manner and take control measures in advance, which poses a serious safety hazard. The existing carbon dioxide local flooding fire extinguishing system is the main fire extinguishing measure, among which the carbon dioxide fire extinguishing system is mainly used for gas fire extinguishing. The fire extinguishing method is relatively simple and the duration is short, which cannot guarantee the timely capture of the initial fire and the effective containment of the fire.

[0005] Therefore, it is urgent to develop an advanced and reliable intelligent monitoring and fire extinguishing decision system for shaft-end fire risk of hydrogen-cooled generator sets. This system can not only fill the gap in existing technologies and improve the safety and reliability of hydrogen-cooled generator sets, but also has important practical significance for ensuring the stability of the power system and promoting the efficient use of clean energy. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention proposes a fire risk monitoring and fire extinguishing system for the shaft end of a hydrogen-cooled generator set.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system, including a generator set shaft end and a fire risk monitoring and fire extinguishing system, characterized in that: the generator set shaft end includes a generator excitation end, a generator steam end and a turbine body shaft end; the fire risk monitoring and fire extinguishing system includes a monitoring module, a control module and a fire extinguishing module; the monitoring module monitors the fire risk and feeds back data signals to the control module; the control module receives the data signal from the monitoring module, analyzes and generates feedback data, confirms the scope and type of the fire risk, and then forms processing measures and sends control signals to the fire extinguishing module; the fire extinguishing module receives the control signal from the control module and performs fire extinguishing processing to protect the safety of the generator set; the fire extinguishing module includes a gas fire extinguishing device, a foam fire extinguishing device and a fire water sprinkler fire extinguishing device, the three of which together constitute a three-level fire extinguishing measure, which can quickly control and eliminate the fire risk at the generator set shaft end, reduce economic losses, and protect personnel safety.

[0008] The control module includes a general control unit and a human-computer interaction interface; the human-computer interaction interface is used to display feedback data generated by the control module analysis, and can also be used to receive user input instructions and remotely control the fire extinguishing module.

[0009] The monitoring module includes a flame detector, a smoke detector, an infrared temperature sensor and a hydrogen detector.

[0010] The flame detector is arranged at the generator excitation end, the generator steam end and the turbine body shaft end, 1.0~8.0m away from the center point of the shaft end, and at least one flame detector is arranged at each position; The smoke detectors are arranged directly above the generator excitation end, the generator steam end and the turbine body shaft end, 1.0~3.0m away from the center point of the shaft end, and no less than one is arranged at each position.

[0011] The infrared temperature sensors are arranged in a circular range with the generator excitation end, the generator steam end and the center point of the turbine body shaft end as the center, with an inner radius of 0.2 meters and an outer radius of 1.0 meters, and 2 to 8 infrared temperature sensors are arranged at each position.

[0012] The hydrogen detectors are arranged in a circular range with the center point of the generator excitation end and the generator steam end as the center, an inner radius of 0.2 meters and an outer radius of 1.0 meters, and 1 to 6 are arranged at each position.

[0013] The gas fire extinguishing device is a first-level fire extinguishing device. After the control module receives the abnormal data signal fed back by the monitoring module, it analyzes and processes it and sends a control signal to the fire extinguishing module to start the gas fire extinguishing device to extinguish the fire. The fire extinguishing gas is carbon dioxide or other inert gas.

[0014] The foam fire extinguishing device is a second-level fire extinguishing device. After the first-level fire extinguishing device is started, if the data signal fed back by the monitoring module is still abnormal, the foam fire extinguishing device is manually started, and the device is shut down and the hydrogen delivery is stopped.

[0015] The fire sprinkler fire extinguishing device is a third-level fire extinguishing device. After the second-level fire extinguishing device is activated, if the data signal fed back by the monitoring module is still abnormal, the staff will judge the fire situation. If the fire is still not extinguished or is uncontrollable, the fire sprinkler fire extinguishing device will be manually opened until the fire is extinguished.

[0016] The present invention is a fire risk monitoring and fire extinguishing system for the shaft end of a hydrogen-cooled generator set. The fire risk monitoring and fire extinguishing system comprises a monitoring module, a control module and a fire extinguishing module; the monitoring module monitors the fire risk in real time through a flame detector, a smoke detector, an infrared temperature sensor and a hydrogen detector and feeds back a data signal to the control module; the control module receives the data signal from the detection module and performs analysis and processing to confirm the scope and type of the fire risk, then forms processing measures and sends a control signal to the fire extinguishing module; the fire extinguishing module receives the control signal from the control module and performs fire extinguishing processing to protect the safety of the generator set; the invention can realize the fire risk monitoring of the shaft end of the generator set and take three-level fire extinguishing measures, quickly control and eliminate the fire risk at the shaft end of the generator set, reduce economic losses and protect personnel safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention shows a structural diagram of a hydrogen-cooled generator set shaft end fire risk monitoring and extinguishing system.

[0018] Figure 2 This is a front view of a generator excitation end (steam end) monitoring device and fire sprinkler layout of a hydrogen-cooled generator set shaft end fire risk monitoring and extinguishing system shown in the present invention.

[0019] Figure 3 The present invention shows a front view of a steam turbine body shaft end monitoring device and a fire sprinkler layout of a shaft end fire risk monitoring and extinguishing system for a hydrogen-cooled generator set.

[0020] Figure 4 The present invention shows a schematic diagram of a fire protection pipeline at the generator excitation end (steam end) of a hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system.

[0021] Figure 5 The present invention shows a schematic diagram of a fire protection pipeline at the shaft end of a turbine body of a hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system.

[0022] In the figure: 1, smoke detector, 2, flame detector, 3, smoke detector, 4, flame detector, 5, smoke detector, 6, flame detector, 7, carbon dioxide nozzle, 8, fire sprinkler head, 9, foam fire sprinkler, 10, carbon dioxide nozzle, 11, fire sprinkler head, 12, foam fire sprinkler, 13, carbon dioxide nozzle, 14, fire sprinkler head, 15, foam fire sprinkler, 16, carbon dioxide nozzle, 17, fire sprinkler head, 18, foam fire sprinkler, 19, carbon dioxide nozzle, 20, fire sprinkler head, 21, foam fire sprinkler, 22, carbon dioxide nozzle, 23, fire sprinkler head, 24, foam fire sprinkler, 25, carbon dioxide nozzle, 26, fire sprinkler head, 27, foam fire sprinkler, 28, carbon dioxide nozzle, 29, fire sprinkler head, 30, foam fire sprinkler, 31. Carbon dioxide nozzle, 32. Fire water sprinkler, 33. Foam fire extinguishing nozzle, 34. Infrared temperature sensor, 35. Carbon dioxide nozzle, 36. Hydrogen detector, 37. Infrared temperature sensor, 38. Carbon dioxide nozzle, 39. Infrared temperature sensor, 40. Infrared temperature sensor, 41. Carbon dioxide nozzle, 42. Hydrogen detector, 43. Infrared temperature sensor, 44. Carbon dioxide nozzle, 45. Infrared temperature sensor, 46. Infrared temperature sensor, 47. Infrared temperature sensor, 48. Infrared temperature sensor, 49. Electric shut-off valve, 50. Electric shut-off valve, 51. Electric shut-off valve, 52. Electric shut-off valve, 53. Electric shut-off valve, 54. Electric shut-off valve, 55. Carbon dioxide nozzle, 56. Carbon dioxide nozzle, 57. Electric shut-off valve, 58. Electric shut-off valve, 59. Electric shut-off valve. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0024] like Figures 1 to 5As shown, a fire risk monitoring and fire extinguishing system for the shaft end of a hydrogen-cooled generator set includes two parts: the shaft end of the generator set and the fire risk monitoring and fire extinguishing system; the shaft end of the generator set includes the generator excitation end, the generator steam end and the turbine body shaft end; the fire risk monitoring and fire extinguishing system includes a monitoring module, a control module and a fire extinguishing module; the monitoring module monitors the fire risk and feeds back the data signal to the control module; the control module receives the data signal from the monitoring module, analyzes and generates feedback data, confirms the scope and type of the fire risk, and then forms processing measures and sends control signals to the fire extinguishing module; the fire extinguishing module receives the control signal from the control module and performs fire extinguishing processing to protect the safety of the generator set; the fire extinguishing module includes a gas fire extinguishing device, a foam fire extinguishing device and a fire water sprinkler fire extinguishing device, which together constitute a three-level fire extinguishing measure, which can quickly control and eliminate the fire risk at the shaft end of the generator set, reduce economic losses and protect personnel safety.

[0025] like Figures 1 to 3 As shown, smoke detectors 1, 3, and 5 are arranged directly above the generator excitation end, the generator steam end, and the turbine body shaft end, 1.5 meters away from the center point of the shaft end.

[0026] like Figures 1 to 3 As shown, flame detectors 2, 4, and 6 are arranged directly above the generator excitation end, the generator steam end, and the turbine body shaft end, 1.5 m away from the center point of the shaft end.

[0027] like Figures 1 to 3 As shown, infrared temperature sensors 34, 37, 39, 40, 43, 45, 46, 47, 48 are arranged at a circle with a radius of 0.5 meters, with the generator excitation end, the generator steam end and the center point of the turbine body shaft end as the center.

[0028] like Figure 1~2 As shown, the hydrogen detectors 36, 42 are arranged at a circle with a radius of 0.5 meters, with the center point of the steam end of the generator and the center point of the excitation end of the generator as the center.

[0029] The gas fire extinguishing device is a first-level fire extinguishing device, and the fire extinguishing gas is carbon dioxide; after the control module receives the abnormal data signal collected and sent by the monitoring module, the control module analyzes and processes it and sends a control signal to the fire extinguishing module. The fire extinguishing module receives the control signal from the control module, and then opens the electric shut-off valves 51, 54, and 59, and releases carbon dioxide gas through the carbon dioxide nozzles 7, 10, 13, 16, 19, 22, 25, 28, 31, 35, 38, 41, 44, 55, and 56 to perform the first-level fire extinguishing.

[0030] The foam fire extinguishing device is a second-level fire extinguishing device. After the first-level fire extinguishing device is started, if the data signal collected and sent by the monitoring module is still abnormal, the machine will be shut down immediately, the hydrogen delivery will be stopped, and the electric shut-off valves 49, 52, and 57 will be manually opened. Foam will be sprayed through the foam fire extinguishing nozzles 9, 12, 15, 18, 21, 24, 27, 30, and 33 to perform the second-level fire extinguishing.

[0031] The fire sprinkler fire extinguishing device is a third-level fire extinguishing device. After the second-level fire extinguishing device is activated, if the data signal collected and sent by the monitoring module is still abnormal, the staff will judge the fire situation. If the fire is still not extinguished or uncontrollable, the electric shut-off valves 50, 53, and 58 will be manually opened to spray fire water through the fire sprinkler heads 8, 11, 14, 17, 20, 23, 26, 29, and 32 to perform the third-level fire extinguishing until the fire is extinguished.

[0032] The above description and illustrations show the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the specific details of the above exemplary embodiments. The present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments of the present invention should be regarded as exemplary rather than restrictive. The scope of protection of the present invention is defined by the attached claims, rather than the description of the above specific embodiments. Any changes that fall within the equivalent meaning and scope of the claims should be included in the present invention. The figure marks in the claims should not be interpreted as limiting the scope of protection of the claims.

[0033] In addition, it should be understood that although this specification is described according to specific embodiments, not every embodiment contains only one independent technical solution. This description of the specification is only for the sake of clarity, and those skilled in the art should understand the specification as a whole. The technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fire risk monitoring and fire extinguishing system for the shaft end of a hydrogen-cooled generator set, comprising a shaft end of a generator set and a fire risk monitoring and fire extinguishing system, characterized in that: The shaft end of the generator set includes the generator excitation end, the generator steam end and the turbine body shaft end; the fire risk monitoring and fire extinguishing system includes a monitoring module, a control module and a fire extinguishing module; the monitoring module monitors the fire risk and feeds back data signals to the control module; the control module receives the data signal from the monitoring module, analyzes and generates feedback data, confirms the scope and type of the fire risk, and then forms processing measures and sends control signals to the fire extinguishing module; the fire extinguishing module receives the control signal from the control module and performs fire extinguishing processing to protect the safety of the generator set; the fire extinguishing module includes a gas fire extinguishing device, a foam fire extinguishing device and a fire water sprinkler fire extinguishing device, which together constitute a three-level fire extinguishing measure, which can quickly control and eliminate the fire risk at the shaft end of the generator set, reduce economic losses, and protect personnel safety.

2. A hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system according to claim 1, characterized in that: The control module includes a general control unit and a human-computer interaction interface; the human-computer interaction interface is used to display feedback data generated by the control module analysis, and can also be used to receive user input instructions and remotely control the fire extinguishing module.

3. A hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system according to claim 1, characterized in that: The monitoring module includes a flame detector, a smoke detector, an infrared temperature sensor and a hydrogen detector.

4. A hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system according to claim 3, characterized in that: The flame detectors are arranged directly above the generator excitation end, the generator steam end and the turbine body shaft end, 1.0~8.0m away from the center point of the shaft end, and no less than one is arranged at each position.

5. A hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system according to claim 3, characterized in that: The smoke detectors are arranged directly above the generator excitation end, the generator steam end and the turbine body shaft end, 1.0~3.0m away from the center point of the shaft end, and no less than one is arranged at each position.

6. A hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system according to claim 3, characterized in that: The infrared temperature sensors are arranged in a circular range with the generator excitation end, the generator steam end and the center point of the turbine body shaft end as the center, with an inner radius of 0.2 meters and an outer radius of 1.0 meters, and 2 to 8 infrared temperature sensors are arranged at each position.

7. A hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system according to claim 3, characterized in that: The hydrogen detectors are arranged in a circular range with the center point of the generator excitation end and the generator steam end as the center, an inner radius of 0.2 meters and an outer radius of 1.0 meters, and 1 to 6 are arranged at each position.

8. The hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system according to claim 1 is characterized by: The gas fire extinguishing device is a first-level fire extinguishing device. After the control module receives the abnormal data signal fed back by the monitoring module, it analyzes and processes it and sends a control signal to the fire extinguishing module to start the gas fire extinguishing device to extinguish the fire. The fire extinguishing gas is carbon dioxide or other inert gas.

9. A hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system according to claim 1, characterized in that: The foam fire extinguishing device is a second-level fire extinguishing device. After the first-level fire extinguishing device is started, if the data signal fed back by the monitoring module is still abnormal, the foam fire extinguishing device is manually started, and the device is shut down and the hydrogen delivery is stopped.

10. A hydrogen-cooled generator set shaft end fire risk monitoring and fire extinguishing system according to claim 1, characterized in that: The fire sprinkler fire extinguishing device is a third-level fire extinguishing device. After the second-level fire extinguishing device is activated, if the data signal fed back by the monitoring module is still abnormal, the staff will judge the fire situation. If the fire is still not extinguished or is uncontrollable, the fire sprinkler fire extinguishing device will be manually opened until the fire is extinguished.

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