Boiler room system for supplying heat by utilizing exhaust steam waste heat of steam turbine and use method of boiler room system

Abstract

The invention discloses a boiler room system using steam turbine exhaust steam waste heat to supply heat and a using method of the boiler room system using the steam turbine exhaust steam waste heat to supply heat, the system comprises a closed boiler room, a boiler device, a heat exchanger and a heat exchanger, the cooling triangular heat dissipation devices are arranged on the periphery of the bottom of the closed boiler room, and the cooling triangular heat dissipation devices are provided with adjustable shutters; the air outlet is formed in the top of the closed boiler room; and the circulating water supply system is used for supplying unit circulating water to the cooling triangular heat dissipation device, and the circulating water supply system comprises a water inlet pipeline communicated with an outlet water pipeline of a condenser of the steam turbine and a water return pipeline communicated with an inlet pipeline of a circulating water pump. The heat supply requirement of the bottom of the boiler room can be met by fully utilizing exhaust steam waste heat of the steam turbine, meanwhile, the problem that temperature distribution in the boiler room is uneven is solved, auxiliary steam consumption is reduced, the unit power generation efficiency is improved, the boiler room operation environment is improved, and the equipment reliability is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of energy saving of thermal power generating units, and more particularly relates to a boiler house system utilizing exhaust heat of turbine exhaust steam and a use method of the boiler house system utilizing exhaust heat of turbine exhaust steam. BACKGROUND

[0002] Due to the characteristics of high building height and large internal space, the power station boiler house has significant heat loss during the operation of the boiler, which usually accounts for 0.2% to 0.6% of the heat released by the boiler combustion. The continuous heat loss of the boiler causes the internal temperature of the boiler house to be higher than the external ambient temperature, and thus the internal atmospheric pressure of the boiler house is lower than the external ambient pressure. In the winter operation condition, the internal and external pressure difference of the boiler house can be as high as about 200 Pa. This pressure difference will drive a large amount of cold air to leak into the boiler house from the positions where the sealing is not tight enough, forming a significant chimney effect. Although the temperature at the upper part of the boiler house can reach about 65℃, the temperature at the bottom of the boiler house is too low, and a large number of heating facilities must be laid to prevent the freezing damage of the equipment at the bottom of the boiler house or to affect the normal operation, resulting in energy waste.

[0003] At the same time, the high-temperature environment at the top of the boiler house not only seriously affects the inspection and maintenance work of the staff, but also reduces the use reliability and service life of electrical equipment and thermal instruments. On the other hand, the steam turbine of the thermal power generating unit generates a large amount of low-grade exhaust heat during operation. These exhaust heat is taken away by the circulating water of the unit through the condenser and then discharged into the cooling tower, and cannot be effectively utilized, resulting in secondary waste of energy.

[0004] Therefore, how to fully utilize the exhaust heat of the turbine exhaust steam to solve the heating demand at the bottom of the boiler house, while improving the problem of uneven temperature distribution in the boiler house, reducing the consumption of auxiliary steam, improving the power generation efficiency of the unit, improving the working environment of the boiler house and improving the reliability of the equipment, is the focus of the technical personnel in the field. SUMMARY

[0005] The purpose of the present application is to provide a boiler house system utilizing exhaust heat of turbine exhaust steam and a use method of the boiler house system utilizing exhaust heat of turbine exhaust steam, which can fully utilize the exhaust heat of turbine exhaust steam to solve the heating demand at the bottom of the boiler house, while improving the problem of uneven temperature distribution in the boiler house, reducing the consumption of auxiliary steam, improving the power generation efficiency of the unit, improving the working environment of the boiler house and improving the reliability of the equipment.

[0006] In view of the above defects or improvement needs of the prior art, the present application provides a boiler house system utilizing exhaust heat of turbine exhaust steam, which comprises: a closed boiler house, which is internally provided with a boiler device; Cooling triangle heat dissipation device, arranged at the bottom of the closed boiler room, the cooling triangle heat dissipation device being provided with adjustable louvers; Air outlet, arranged at the top of the closed boiler room, the air outlet being provided with adjustable louvers; Circulating water supply system, used for supplying unit circulating water to the cooling triangle heat dissipation device, the circulating water supply system comprising a water inlet pipeline in communication with an outlet water pipeline of a condenser of a steam turbine and a water return pipeline in communication with an inlet pipeline of a circulating water pump; Temperature monitoring device, arranged at the bottom and the top of the closed boiler room, respectively; Pressure monitoring device, arranged at the middle of the closed boiler room.

[0007] Optionally, the circulating water supply system comprises a boiler room heat dissipation system water inlet valve, a boiler room heat dissipation system water inlet regulating valve and a boiler room heat dissipation system water return valve. The boiler room heat dissipation system water inlet valve is arranged on the water inlet pipeline, the boiler room heat dissipation system water inlet regulating valve is arranged between the boiler room heat dissipation system water inlet valve and the cooling triangle heat dissipation device, and the boiler room heat dissipation system water return valve is arranged on the water return pipeline.

[0008] Optionally, the circulating water supply system further comprises a neighboring unit communication pipeline. The neighboring unit communication pipeline comprises a neighboring unit circulating water inlet communication pipeline and a neighboring unit circulating water return communication pipeline, the neighboring unit circulating water inlet communication pipeline is provided with a neighboring unit circulating water inlet communication shut-off valve and a neighboring unit circulating water inlet communication shut-off valve, the neighboring unit circulating water return communication pipeline is provided with a neighboring unit circulating water return communication shut-off valve and a neighboring unit circulating water return communication shut-off valve, and the neighboring unit communication pipeline is used for introducing unit circulating water from a neighboring unit condenser when a unit is shut down.

[0009] Optionally, the circulating water supply system further comprises: An auxiliary heating device, which forms a closed circulation loop with the circulating water supply system through an auxiliary heating device water inlet pipeline and an auxiliary heating device water outlet pipeline, the auxiliary heating device water inlet pipeline is provided with an auxiliary heating device water inlet shut-off valve, the auxiliary heating device water outlet pipeline is provided with an auxiliary heating device water outlet shut-off valve, and the auxiliary heating device is provided with an auxiliary heating device circulating water pump.

[0010] Optionally, the auxiliary heating device comprises at least one of an auxiliary heating device steam heater and an auxiliary heating device electric heater, used for heating circulating water when a unit is shut down.

[0011] Optionally, the circulating water supply system further includes: a circulating water inlet temperature measuring point and a circulating water return temperature measuring point, wherein the circulating water inlet temperature measuring point is located at the condenser outlet and the circulating water return temperature measuring point is located on the return water pipeline.

[0012] Optionally, the enclosed boiler room is equipped with a blower or a primary air fan, and the air intake of the blower or primary air fan is located inside the enclosed boiler room to draw in air heated by the cooling triangular heat dissipation device.

[0013] Optionally, it may also include: a heater, which is disposed on the air inlet side of the blower or primary air blower for supplementing heating of the intake air.

[0014] Optionally, the opening degree of the louvers of the cooling triangle heat dissipation device and the opening degree of the louvers of the air outlet can be adjusted according to the detection data of the temperature monitoring device and the pressure monitoring device to control the air flow and temperature entering the enclosed boiler room.

[0015] This application also provides a method for using a boiler room system that utilizes waste heat from steam turbine exhaust for heating, applying the boiler room system as described in claims 1 to 9, including: Under normal operating conditions, the boiler room heat dissipation system inlet valve and boiler room heat dissipation system return valve are opened, and a portion of the unit's circulating water is drawn out from the condenser outlet water pipe of the steam turbine. After passing through the boiler room heat dissipation system inlet valve and boiler room heat dissipation system inlet regulating valve, it enters the cooling triangle heat dissipation device. The unit's circulating water exchanges heat with the air in the cooling triangle heat dissipation device. After heating the air, the temperature decreases. The cooled circulating water returns to the inlet pipe of the circulating water pump through the boiler room heat dissipation system return valve. When the unit is shut down and the adjacent unit is running, close the boiler room heat dissipation system inlet valve and boiler room heat dissipation system return valve, open the adjacent unit circulating water inlet connection shut-off valve, the adjacent unit circulating water inlet connection shut-off valve, the adjacent unit circulating water connection shut-off valve, and the adjacent unit circulating water return connection shut-off valve. Draw out a portion of the unit's circulating water from the outlet water pipe of the adjacent unit condenser, and enter the cooling triangle heat dissipation device for heat dissipation through the adjacent unit connection pipeline and the boiler room heat dissipation system inlet regulating valve. The cooled circulating water returns to the adjacent unit circulating water pump inlet pipe through the adjacent unit connection pipeline. When both units are shut down, close the inlet valve and return valve of the boiler room heat dissipation system, open the inlet valve of the adjacent unit's circulating water, the return valve of the adjacent unit's circulating water, the inlet valve of the auxiliary heating device, and the outlet valve of the auxiliary heating device, put the steam heater or electric heater of the auxiliary heating device into operation, and start the circulating water pump of the auxiliary heating device. The heated circulating water enters the cooling triangle heat dissipation device for heat dissipation through the inlet regulating valve of the boiler room heat dissipation system, and the cooled circulating water returns to the auxiliary heating device for heating, forming a closed loop.

[0016] This application provides a boiler room system for heating using waste heat from steam turbine exhaust, comprising: a closed boiler room containing a boiler unit; a cooling triangular heat dissipation device disposed around the bottom of the closed boiler room, the cooling triangular heat dissipation device having adjustable louvers; an air outlet disposed at the top of the closed boiler room, the air outlet having adjustable louvers; a circulating water supply system for supplying circulating water to the cooling triangular heat dissipation device, the circulating water supply system including an inlet pipe connected to the outlet water pipe of the steam turbine condenser and a return water pipe connected to the inlet pipe of the circulating water pump; temperature monitoring devices disposed at the bottom and top of the closed boiler room respectively; and a pressure monitoring device disposed in the middle of the closed boiler room.

[0017] It has the following beneficial effects: By installing cooling triangular heat dissipation devices around the bottom of the enclosed boiler room, high-temperature circulating water from the turbine condenser outlet is introduced for heat exchange. This utilizes the waste heat from the turbine exhaust to heat the cold air entering the boiler room, effectively solving the problem of excessively low temperatures at the bottom of the boiler room and improving the working environment during winter operation. Simultaneously, the heated air forms an upward airflow circulation within the boiler room, exiting through the top air outlet, reducing the temperature at the top of the boiler room and resolving the problem of excessively high temperatures at the top of traditional boiler rooms. Through the configuration of temperature and pressure monitoring devices, combined with adjustable louver opening control, precise regulation of temperature and pressure within the boiler room is achieved, creating a favorable temperature gradient distribution. This system fully utilizes the low-grade waste heat from the turbine exhaust, reducing the consumption of high-quality auxiliary steam, improving energy efficiency, and simultaneously enhancing equipment reliability and personnel comfort. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 A schematic diagram of a boiler room structure for a boiler room system that utilizes waste heat from steam turbine exhaust, provided as an embodiment of this application; Figure 2 This is a schematic diagram of a circulating water system for a boiler room system that utilizes waste heat from steam turbine exhaust, provided as an embodiment of this application.

[0020] In the picture: Enclosed boiler room-1, boiler unit-2, cooling triangular heat dissipation device-3, adjustable louvers-4, air outlet-5, boiler room top temperature measuring point-6, boiler room bottom temperature measuring point-7, blower-8, air heater-9; air intake-10, flue-11, rotary air preheater-12, boiler room pressure measuring point-13, boiler rear flue-hole-14, condenser-15, circulating water inlet temperature measuring point-16, indirect cooling tower heat dissipation system-17, circulating water pump-18, boiler room heat dissipation system inlet valve-19; boiler room heat dissipation system inlet regulating valve- 20. Adjacent unit circulating water inlet shut-off valve - 21. Return to adjacent unit circulating water shut-off valve - 22. Circulating water return temperature measuring point - 23. Boiler room heat dissipation system - 24. Boiler room heat dissipation system return valve - 25. Auxiliary heating device inlet shut-off valve - 26. Auxiliary heating device steam heater - 27. Auxiliary heating device electric heater - 28. Auxiliary heating device - 29. Auxiliary heating device circulating water pump - 30. Auxiliary heating device outlet shut-off valve - 31. To adjacent unit circulating water inlet shut-off valve - 32. Adjacent unit circulating water return shut-off valve - 33. Detailed Implementation

[0021] The purpose of this application is to provide a boiler room system that utilizes the waste heat from steam turbine exhaust, and a method for using the boiler room system that utilizes the waste heat from steam turbine exhaust. This system can fully utilize the waste heat from steam turbine exhaust to meet the heating needs at the bottom of the boiler room, while also improving the problem of uneven temperature distribution inside the boiler room. This reduces auxiliary steam consumption, improves the power generation efficiency of the unit, improves the working environment of the boiler room, and enhances equipment reliability.

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a boiler room structure for a boiler room system that utilizes waste heat from steam turbine exhaust, provided as an embodiment of this application.

[0024] Please refer to Figure 2 , Figure 2 This is a schematic diagram of a circulating water system for a boiler room system that utilizes waste heat from steam turbine exhaust, provided as an embodiment of this application.

[0025] The following embodiment illustrates a boiler room system that utilizes waste heat from steam turbine exhaust, as provided in this application.

[0026] like Figure 1 and Figure 2 This embodiment provides a boiler room system that uses exhaust heat from a steam turbine for heating, including a closed boiler room 1, a cooling triangle heat dissipation device 3, a circulating water supply system, and a monitoring device.

[0027] The enclosed boiler room 1 is a fully enclosed structure, housing a boiler unit 2. The boiler unit 2 can be a conventional coal-fired boiler, gas-fired boiler, or oil-fired boiler. Cooling triangular heat dissipation devices 3 are installed around the bottom of the enclosed boiler room 1. These devices are conventional cooling triangular tube bundle structures with adjustable louvers 4 on the outside. An air outlet 5 is installed at the top of the enclosed boiler room 1. The air outlet 5 has sufficient airflow area and adjustable louvers to control the airflow.

[0028] The circulating water supply system supplies circulating water to the cooling triangular heat dissipation device 3. This system includes an inlet pipe and a return pipe. The inlet pipe is connected to the outlet water pipe of the turbine condenser 15, and the return pipe is connected to the inlet pipe of the circulating water pump 18. A boiler room heat dissipation system inlet valve 19 and a boiler room heat dissipation system inlet regulating valve 20 are sequentially installed on the inlet pipe. The boiler room heat dissipation system inlet valve 19 is used to control the start and stop of the system, and the boiler room heat dissipation system inlet regulating valve 20 is used to regulate the flow rate of circulating water entering the cooling triangular heat dissipation device 3. A boiler room heat dissipation system return valve 25 is installed on the return pipe. All the cooling triangular heat dissipation devices 3 are connected to the circulating water inlet and return pipes through pipelines to form the boiler room heat dissipation system 24.

[0029] The circulating water supply system also includes a circulating water inlet temperature measuring point 16 and a circulating water return temperature measuring point 23. The circulating water inlet temperature measuring point 16 is located at the outlet of the condenser 15 and is used to monitor the temperature of the circulating water entering the cooling triangle heat dissipation device 3. The circulating water return temperature measuring point 23 is located on the return water pipe and is used to monitor the temperature of the circulating water after cooling.

[0030] Temperature monitoring devices are installed at the bottom and top of the enclosed boiler room 1 to detect the temperature at different heights within the boiler room. Temperature measuring point 7 at the bottom of the boiler room is used to prevent equipment malfunction due to excessively low temperatures at the bottom, while temperature measuring point 6 at the top of the boiler room is used to monitor the temperature at the top, preventing excessively high temperatures from affecting equipment and personnel. Pressure monitoring devices, specifically pressure measuring point 13, are located in the middle of the enclosed boiler room 1 to detect the pressure within the boiler room.

[0031] The working principle of this embodiment is as follows: Under normal operating conditions, the circulating water of the unit is heated by heat exchange in the condenser 15, and part of it is sent to the intercooler tower heat dissipation system 17 for cooling. After cooling, it is sent back to the condenser 15 for heat absorption and circulation by the circulating water pump 18. The other part of the circulating water is led out from the outlet water pipe of the condenser 15, and the boiler room heat dissipation system inlet valve 19 and boiler room heat dissipation system return water valve 25 are opened. The circulating water enters the cooling triangle heat dissipation device 3 in the boiler room heat dissipation system 24 through the boiler room heat dissipation system inlet regulating valve 20. In the cooling triangle heat dissipation device 3, the high-temperature circulating water exchanges heat with the external cold air. After the air is heated, its temperature rises, and driven by the pressure difference between the inside and outside of the boiler room, it enters the closed boiler room 1 to achieve heating of the bottom of the boiler room. The cooled circulating water returns to the inlet pipe of the circulating water pump 18 through the boiler room heat dissipation system return water valve 25 and re-enters the circulation.

[0032] By adjusting the opening of the adjustable louvers 4 of the cooling triangular heat dissipation device 3 and the adjustable louvers of the air outlet 5, the airflow and temperature entering the enclosed boiler room 1 can be controlled. When the temperature at the bottom of the boiler room is too low, the opening of the louvers 4 can be closed to reduce the amount of cold air entering, while the opening of the boiler room heat dissipation system inlet water regulating valve 20 can be increased to increase the circulating water flow and improve the heating capacity. A dynamic temperature balance is formed inside the boiler room, which not only raises the temperature at the bottom of the boiler room, but also lowers the temperature at the top of the boiler room due to air circulation, thus improving the working environment.

[0033] In summary, this embodiment effectively solves the problem of excessively low temperatures at the bottom of the boiler room by installing a cooling triangular heat dissipation device around the perimeter of the enclosed boiler room. This allows the high-temperature circulating water from the turbine condenser outlet to be introduced for heat exchange, utilizing the waste heat from the turbine exhaust to heat the cold air entering the boiler room, thus improving the working environment during winter operation. Simultaneously, the heated air forms an upward airflow circulation within the boiler room, exiting through the top air outlet, reducing the temperature at the top of the boiler room and resolving the problem of excessively high temperatures at the top of traditional boiler rooms. Through the configured temperature and pressure monitoring devices, combined with adjustable louver opening control, precise regulation of temperature and pressure within the boiler room is achieved, creating a favorable temperature gradient distribution. This system fully utilizes the low-grade waste heat from the turbine exhaust, reducing the consumption of high-quality auxiliary steam, improving energy efficiency, and simultaneously enhancing equipment reliability and personnel comfort.

[0034] Furthermore, the following specific embodiment will further illustrate the boiler room system for heating using exhaust heat from a steam turbine provided in this application.

[0035] Based on the first embodiment, this embodiment adds a connecting pipeline between adjacent units and an auxiliary heating device to meet the heating needs of the boiler room after the unit is shut down.

[0036] See Figure 2 The circulating water supply system also includes adjacent unit connection pipelines. These pipelines include adjacent unit circulating water inlet connection pipelines and adjacent unit circulating water return connection pipelines. The adjacent unit circulating water inlet connection pipeline is equipped with an adjacent unit circulating water inlet connection shut-off valve 32 and an adjacent unit circulating water inlet connection shut-off valve 21, while the adjacent unit circulating water return connection pipeline is equipped with an adjacent unit circulating water return connection shut-off valve 22 and an adjacent unit circulating water return connection shut-off valve 33. These adjacent unit connection pipelines are used to introduce unit circulating water from the adjacent unit condenser when the unit is shut down.

[0037] The system also includes an auxiliary heating device 29. The auxiliary heating device 29 is connected to the circulating water supply system via an auxiliary heating device inlet pipe and an auxiliary heating device outlet pipe, forming a closed-loop circulation system. An auxiliary heating device inlet shut-off valve 26 is installed on the auxiliary heating device inlet pipe, and an auxiliary heating device outlet shut-off valve 31 is installed on the auxiliary heating device outlet pipe. The auxiliary heating device 29 is equipped with an auxiliary heating device circulating water pump 30, used to drive the circulating water to circulate in the closed loop. The auxiliary heating device 29 includes an auxiliary heating device steam heater 27 and an auxiliary heating device electric heater 28; one or both heating methods can be selected or used simultaneously depending on the actual situation.

[0038] The usage method of this embodiment is as follows: When this unit is shut down and the adjacent unit is running, close the boiler room cooling system inlet valve 19 and the boiler room cooling system return valve 25, and open the adjacent unit circulating water inlet connection shut-off valve 21, the adjacent unit circulating water inlet connection shut-off valve 32, the adjacent unit circulating water connection shut-off valve 22, and the adjacent unit circulating water return connection shut-off valve 33. A portion of the unit's circulating water is drawn from the outlet water pipe of the adjacent unit condenser and flows through the adjacent unit circulating water inlet connection shut-off valve 32, the adjacent unit circulating water inlet connection shut-off valve 21, and the boiler room cooling system inlet regulating valve 20 into the cooling triangle cooling device 24 for heat dissipation. The cooled circulating water returns to the adjacent unit circulating water pump inlet pipe through the adjacent unit circulating water connection shut-off valve 22 and the adjacent unit circulating water return connection shut-off valve 33, thus utilizing the waste heat of the adjacent unit to heat the boiler room of this unit.

[0039] When both boiler units are shut down, close the boiler room cooling system inlet valve 19 and the boiler room cooling system return valve 25. Open the adjacent unit circulating water inlet shut-off valve 21, the adjacent unit circulating water inlet shut-off valve 22, the auxiliary heating device inlet shut-off valve 26, and the auxiliary heating device outlet shut-off valve 31. Activate the auxiliary heating device steam heater 27 or the auxiliary heating device electric heater 28, and start the auxiliary heating device circulating water pump 30. The heated circulating water passes through the auxiliary heating device outlet shut-off valve 31 and the boiler room cooling system inlet regulating valve 20 to enter the cooling triangle cooling device 24 for heat dissipation. The cooled circulating water then passes through the adjacent unit circulating water inlet shut-off valve 22, the adjacent unit circulating water inlet shut-off valve 21, and the auxiliary heating device inlet shut-off valve 26 back to the auxiliary heating device 29 for reheating, forming a closed loop to ensure the boiler room's heating needs during the shutdown of both boiler units.

[0040] Furthermore, the following specific embodiment will further illustrate the boiler room system for heating using exhaust heat from a steam turbine provided in this application.

[0041] This embodiment further optimizes the ventilation and heating system of the boiler room based on the previous embodiment.

[0042] See Figure 1 An air supply fan 8 or a primary air fan is installed inside the enclosed boiler room 1. The air intake 10 of the air supply fan 8 or primary air fan is located inside the enclosed boiler room 1 to draw in air heated by the cooling triangular heat dissipation device 3. This arrangement can increase the inlet air temperature of the air supply fan 8 or primary air fan, reduce the steam consumption of the winter heater 9, and thus increase the unit's power generation. At the same time, placing the air supply fan 8 and the primary air fan's air intake 10 inside the boiler room can also reduce noise pollution to the outside environment.

[0043] A heater 9 is installed on the air inlet side of the blower 8 or primary air fan to supplement the heating of the intake air. When the air temperature after being heated by the cooling triangular heat dissipation device 3 is still insufficient to meet the boiler combustion requirements, the heater 9 can provide additional heating. Since the initial temperature of the intake air has been increased by the cooling triangular heat dissipation device 3, the steam consumption of the heater 9 is significantly reduced compared to the traditional method.

[0044] The boiler room is also equipped with conventional equipment such as a rotary air preheater 12, a flue 11, and a boiler rear flue 14. The opening of the louvers 4 of the cooling triangular heat dissipation device 3 and the opening of the louvers of the air outlet 5 can be adjusted in real time according to the detection data of the temperature monitoring device (bottom temperature measuring point 7 and top temperature measuring point 6) and the pressure monitoring device (boiler room pressure measuring point 13) to precisely control the airflow and temperature entering the enclosed boiler room 1 and achieve the optimal temperature distribution in the boiler room.

[0045] When the unit is operating under high summer temperatures or when the system is not required, close the boiler room cooling system inlet valve 19 and the boiler room cooling system return valve 25 to shut down the system. If necessary, drain the water inside the cooling triangle radiator 3 to prevent water quality deterioration or pipe corrosion during long-term disuse.

[0046] This invention utilizes the waste heat from the turbine exhaust, solving not only the problem of excessively low temperatures at the bottom of the boiler room but also mitigating the problem of excessively high temperatures at the top. This creates good air circulation, improving the working environment and equipment reliability. Simultaneously, the system reduces the consumption of high-quality auxiliary steam, significantly improving the overall energy efficiency and power generation of the unit.

[0047] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0048] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0049] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0050] The above provides a detailed description of a boiler room system utilizing waste heat from steam turbine exhaust, and its usage method. Specific examples have been used to illustrate the principles and implementation methods of this application. These embodiments are merely illustrative to aid in understanding the method and core concepts of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims.

Claims

1. A boiler house system for heating using exhaust steam waste heat of a steam turbine, characterized in that, The utility model relates to a closed boiler room, which is internally provided with a boiler device. A cooling triangular heat dissipation device is arranged at the bottom of the closed boiler room, and the cooling triangular heat dissipation device is provided with adjustable louvers. An air outlet is arranged at the top of the closed boiler room, and the air outlet is provided with adjustable louvers. A circulating water supply system is used to supply unit circulating water to the cooling triangular heat dissipation device, and the circulating water supply system comprises a water inlet pipeline in communication with an outlet water pipeline of a condenser of a steam turbine and a backwater pipeline in communication with an inlet pipeline of a circulating water pump. Temperature monitoring devices are arranged at the bottom and top of the closed boiler room, respectively. A pressure monitoring device is arranged at the middle of the closed boiler room. The circulating water supply system comprises a boiler room heat dissipation system water inlet valve, a boiler room heat dissipation system water inlet regulating valve and a boiler room heat dissipation system backwater valve.

2. The boiler room system according to claim 1, characterized in that, The boiler room heat dissipation system water inlet valve is arranged on the water inlet pipeline, the boiler room heat dissipation system water inlet regulating valve is arranged between the boiler room heat dissipation system water inlet valve and the cooling triangular heat dissipation device, and the boiler room heat dissipation system backwater valve is arranged on the backwater pipeline. The circulating water supply system further comprises a neighboring unit communication pipeline.

3. The boiler room system according to claim 2, characterized in that, The neighboring unit communication pipeline comprises a neighboring unit circulating water inlet communication pipeline and a neighboring unit circulating water backwater communication pipeline. The neighboring unit circulating water inlet communication pipeline is provided with a neighboring unit circulating water inlet communication shut-off valve and a neighboring unit circulating water inlet communication shut-off valve, the neighboring unit circulating water backwater communication pipeline is provided with a neighboring unit circulating water backwater communication shut-off valve and a neighboring unit circulating water backwater communication shut-off valve, and the neighboring unit communication pipeline is used to introduce unit circulating water from a neighboring unit condenser when the unit is shut down.

4. The boiler room system according to claim 3, characterized in that, Further comprising: An auxiliary heating device, which forms a closed circulation loop in communication with the circulating water supply system through an auxiliary heating device water inlet pipeline and an auxiliary heating device water outlet pipeline.

5. The boiler room system according to claim 4, characterized in that, The auxiliary heating device water inlet pipeline is provided with an auxiliary heating device water inlet shut-off valve, the auxiliary heating device water outlet pipeline is provided with an auxiliary heating device water outlet shut-off valve, and the auxiliary heating device is provided with an auxiliary heating device circulating water pump.

6. The boiler room system according to claim 5, characterized in that The auxiliary heating device comprises at least one of an auxiliary heating device steam heater and an auxiliary heating device electric heater, which is used to heat circulating water when the unit is shut down.

7. The boiler room system according to claim 6, characterized in that The circulating water supply system further comprises a circulating water inlet temperature measuring point and a circulating water backwater temperature measuring point.

8. The boiler room system according to claim 7, characterized in that The circulating water inlet temperature measuring point is arranged at the outlet of the condenser, and the circulating water backwater temperature measuring point is arranged on the backwater pipeline. A supply fan or a primary fan is arranged in the closed boiler room, and the air suction port of the supply fan or the primary fan is arranged inside the closed boiler room and is used to suck in air heated by the cooling triangular heat dissipation device. Further comprising: A warm air heater is arranged on the air inlet side of the supply fan or the primary fan and is used to supplementally heat the sucked-in air.

9. The boiler room system according to claim 8, characterized in that, The opening degree of the louvers of the cooling triangle heat dissipation device and the opening degree of the louvers of the air outlet can be adjusted according to the detection data of the temperature monitoring device and the pressure monitoring device, so as to control the air flow and temperature entering the closed boiler room.

10. A method of using a boiler house system for heating with exhaust steam waste heat of a steam turbine, characterized in that, The application of the boiler room system as claimed in claims 1-9, comprising: In the normal operation condition of the unit, the water inlet valve and the water return valve of the boiler room heat dissipation system are opened, a part of the circulating water of the unit is led out from the outlet water pipeline of the condenser of the steam turbine, enters the cooling triangle heat dissipation device through the water inlet valve and the water inlet regulating valve of the boiler room heat dissipation system, and exchanges heat with air in the cooling triangle heat dissipation device, so that the temperature of the air is reduced after being heated, and the cooled circulating water returns to the inlet pipeline of the circulating water pump through the water return valve; In the condition that the unit is shut down and the adjacent unit is running, the water inlet valve and the water return valve of the boiler room heat dissipation system are closed, the circulating water inlet communication shut-off valve, the circulating water outlet communication shut-off valve, the circulating water return communication shut-off valve and the circulating water return communication shut-off valve of the adjacent unit are opened, a part of the circulating water of the unit is led out from the outlet water pipeline of the condenser of the adjacent unit, enters the cooling triangle heat dissipation device through the communication pipeline of the adjacent unit and the water inlet regulating valve of the boiler room heat dissipation system, and exchanges heat in the cooling triangle heat dissipation device, and the cooled circulating water returns to the inlet pipeline of the circulating water pump of the adjacent unit through the communication pipeline of the adjacent unit; In the condition that both the units are shut down, the water inlet valve and the water return valve of the boiler room heat dissipation system are closed, the circulating water inlet communication shut-off valve, the circulating water return communication shut-off valve, the water inlet shut-off valve and the water outlet shut-off valve of the auxiliary heating device are opened, the steam heater or the electric heater of the auxiliary heating device is put into operation, the circulating water pump of the auxiliary heating device is started, the heated circulating water enters the cooling triangle heat dissipation device through the water inlet regulating valve of the boiler room heat dissipation system, exchanges heat in the cooling triangle heat dissipation device, and the cooled circulating water returns to the auxiliary heating device for heating, so as to form a closed circulation.

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