Compact arrangement structure of main power house of rear-mounted steam turbine

Abstract

The invention discloses a compact rear turbine main power house arrangement structure, and relates to the technical field of energy, the compact rear turbine main power house arrangement structure comprises a three-floor arrangement structure, the first floor arrangement structure comprises a condenser arranged in a turbine, and a condensate pump and a drain flash tank are arranged in a condensate pump pit and a circulating water pump; a vacuumizing system, an open type water system and a main oil tank lubricating oil system are arranged in the first floor arrangement structure, the first floor arrangement structure can descend into a pump pit step by step through a steel platform under zero meter, and the second floor arrangement structure comprises a shaft seal heater, an oil purification device, a top shaft oil pump and a duplex oil filter. And meanwhile, equipment such as an oil cooler, a main oil tank, an energy accumulator and an air cooler is arranged, the air cooler is arranged in a steam turbine platform, and the three-floor arrangement structure comprises a middle-low pressure bypass pipeline, a steam turbine, a generator and a thermal control electronic room. The early-stage investment is reduced, and meanwhile it is ensured that maintenance personnel move smoothly.

Description

Technical Field

[0001] The present invention relates to the technical field of energy, and in particular to a compact layout structure of a rear steam turbine main plant building. Background Art

[0003] For a gas turbine generator unit for combined heat and power supply, in order to maximize heat supply, the steam turbine is set as a back pressure turbine. When the heat supply is insufficient, when the gas turbine back pressure turbine operates for power generation, steam needs to be discharged. On the one hand, it causes economic losses and energy waste, and on the other hand, it generates noise pollution and affects the lives of surrounding residents. In order to avoid the shutdown of the back pressure steam turbine generator unit and solve the phenomenon of tight power supply, the back pressure steam turbine is changed into a steam turbine generator unit that can generate electricity and supply heat, and the discharged steam is used for power generation to improve the energy utilization efficiency.

[0004] Based on the support of advanced science and technology, considering advanced processes and formulating comprehensive systems to achieve the goal of conservation and intensification is the focus of current power plant design. During the design, rely on scientific analysis and planning to achieve "optimization", "refinement", and "rationalization". On the premise of optimizing the layout of the system and saving infrastructure investment, the designed buildings and their equipment layout conform to the principles of ergonomics and are pleasing to the eye. This is the most advanced solution for the design and layout of current power plants.

[0005] The main plant building of a general thermal power plant includes a generator, a steam turbine unit and other auxiliary equipment, steam pipelines, oil pipelines, cables and control lines connecting the equipment. At the same time, sufficient maintenance space needs to be reserved for maintenance personnel, enough space needs to be reserved for the transfer and repair of equipment in the plant building, and passages need to be reserved for the escape of personnel and the fire rescue of firefighters in case of an accident.

[0006] In order to save land area without sacrificing the compressed passage and maintenance space, make full use of space resources, eliminate duplicate construction, and optimize the connecting pipelines and cables between systems. The goal is to make the systems simple, the process smooth, the transition natural, the function complete, and the operation convenient. Therefore, it is of great significance to intensively arrange the condenser, vacuum pumping system, closed water system, steam turbine, generator, shaft seal system, lubricating oil system and related electrical and control equipment.

[0007] In the prior art, the main plant layout device disclosed in the patent publication number CN119352815A includes a steam turbine generator pedestal column and a steam turbine large platform column (the steam turbine large platform column related to the periphery of the steam turbine pedestal column). A fair - faced formwork, wooden strips, and reinforcing channel steels are arranged between the steam turbine generator pedestal column and the steam turbine large platform column. The fair - faced formwork, wooden strips, and reinforcing channel steels are arranged to form the minimum net space distance between the steam turbine generator pedestal column and the steam turbine large platform column to meet the synchronous pouring of the steam turbine generator pedestal column and the steam turbine large platform column. The main plant layout device of the present invention has a sufficient net space size left during the preliminary design of the steam turbine generator pedestal column and the steam turbine large platform column. However, the overall space utilization rate of this comparative technology is low. The present invention intensively arranges the generator, steam turbine unit, and its auxiliary facilities, improving the space utilization rate inside the plant and reducing the floor area. Summary of the Invention

[0008] The purpose of the present invention is to solve the deficiencies of the large floor area occupied by the layout of the steam turbine house of the existing thermal power plant unit, inconvenient operation and management, and large investment caused by long pipelines and cables. It provides a compact main plant with a rear - mounted steam turbine, which can ensure system reliability, maintenance sites, and escape passages while reducing initial investment and project floor area. The present invention intensively arranges the generator, steam turbine unit, and its auxiliary facilities, improving the space utilization rate inside the plant, and provides a layout structure of a compact main plant with a rear - mounted steam turbine.

[0009] Another purpose of the present invention is to solve the instability of the existing plant layout structure. The present invention places each auxiliary facility in three layers, resulting in less overall floor area and providing a layout structure of a compact main plant with a rear - mounted steam turbine.

[0010] To achieve the above - mentioned purposes, the present invention provides the following technical solutions: A layout structure of a compact main plant with a rear - mounted steam turbine, including a three - floor layout structure. The first - floor layout structure includes a condenser arranged inside the steam turbine, a condensate pump and a drain - water expander arranged in the condensate pump pit and the circulating water pump. Among them, a vacuum - pumping system, an open - type water system, and a main - tank lubricating oil system are provided, and they gradually descend to the pump pit through a steel platform. The second - floor layout structure includes a shaft - seal heater, an oil - purification device, a jacking oil pump, and a double - union oil filter arranged, and at the same time, an oil cooler, a main tank, an accumulator, and an air cooler are equipped. The air cooler is arranged inside the steam turbine platform. The third - floor layout structure includes medium - and - low - pressure bypass pipelines, a steam turbine, a generator, and a thermal - control electronics room.

[0011] Preferably, single - rail cranes are arranged at the bottom of the beams in both the open - type pump area and the vacuum - pump area of the first - floor layout structure. The open - type circulating water pump, vacuum pump, and electric water filter inside the first - floor layout structure are maintained through the single - rail crane.

[0012] Preferably, the beams and columns on both sides of the condenser in the layout structure of the first floor are asymmetrically arranged, so that more equipment can be placed on the first floor.

[0013] Preferably, the layout structure of the second floor is the 3.9m floor. When the steel platform reaches the position of the air cooler, the air cooler valves are overhauled, and the steel ladder can reach the overhaul area in the generator air chamber. A certain space is left below the air cooler for placing chemical equipment.

[0014] Preferably, the generator enclosed bus is connected to the main transformer on the south side through the layout structure of the second floor. The main transformer is close to the main plant building, and the south wall in the layout structure of the second floor serves as the firewall for the main transformer.

[0015] Preferably, the layout inside the steam turbine casing on the third floor is relatively loose. An overhaul site with a size of 13m×6m is arranged in the southwest corner of the layout structure on the third floor, which is convenient for the vertical transportation of large equipment materials such as the generator and steam turbine rotors on the third floor. The thermal control electronics room is located in the southwest corner of the main plant building.

[0016] Preferably, a condenser and a steam turbine are arranged in the layout structure on the third floor. The overhaul area of the steam turbine rotor is located on the east side of the steam turbine pedestal. The excitation room on the second floor and the switchgear room on the first floor are vertically arranged downward from the thermal control electronics room on the third floor. The thermal control electronics room is equipped with an anti-static floor.

[0017] Preferably, in the layout structure on the third floor, the generator is arranged near the overhaul space, which is convenient for generator overhaul.

[0018] Preferably, on the south side of the generator in the layout structure on the third floor is the overhaul area of the generator rotor. At the same time, there are inspection holes for the main oil tank, condensate pump and circulating water butterfly valve, which is convenient for the external transportation and repair of the equipment on the first and second floors.

[0019] Preferably, the stairwell of the main plant building and the condenser water side extraction pipe space are both arranged outdoors.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, the rear machines of the gas turbine and the generator are centrally arranged in one plant building. The condenser core extraction is on the west side, the main steam inlet pipe is on the east side, the condenser circulating water inlet pipe is on the west side, the power generation outgoing line is on the south side, and the overhaul site is on the southeast side of the plant building. The main passage is arranged along the axis on the zero-meter floor, and the evacuation stairs are located at the northeast corner and the west side of the plant building respectively. A large door is set on the west side of the south of the zero-meter floor as the access channel for equipment maintenance, and personnel access channels are set in the southwest, north and east. The present invention enables the full utilization of the open spaces around the plant building, saves land occupation, reduces the upfront investment, and at the same time ensures the smooth movement line of the maintenance personnel. The lengths of the oil and gas pipelines and cables in the steam turbine room are reduced, which is convenient for personnel to overhaul. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic diagram of the 0m floor plan layout structure of the turbine hall of the present invention.

[0022] Figure 2 It is Figure 1 a schematic diagram of the 3.9m floor plan layout structure of the second floor of the turbine hall in

[0023] Figure 3 It is Figure 1 a schematic diagram of the 7.9m floor plan layout structure of the third floor of the turbine hall in

[0024] Figure 4 It is Figure 1 a sectional view of the turbine hall in

[0025] In the figure: 1. Condenser; 2. Steam turbine; 3. Condensate pump; 4. Circulating water pump; 5. Vacuum extraction system; 6. Open water system; 7. Steam seal heater; 8. Jacking oil pump; 9. Dual oil filter; 10. Air cooler; 11. Medium and low pressure bypass pipeline; 12. Generator; 13. Thermal control electronics room; 14. Drain flash tank; 15. Stairwell; 16. Maintenance space; 17. Switchgear room; 18. Main oil tank; 19. Excitation room; 20. Thermal control electronics room. Specific embodiments

[0026] The following will, through specific embodiments and in conjunction with the accompanying drawings, further specifically describe the technical solutions of the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Embodiment 1: Referring to Figures 1 to 4 , a compact layout structure of 12 sets of main power plants for steam turbines and generators. The layout structure on the first floor includes a condenser 1. The condenser 1 condenses the steam discharged from the steam turbine 2 into water, thereby realizing the efficient conversion of thermal energy into mechanical energy. In this design, the condenser 1 is arranged inside the steam turbine 2. This layout not only saves space but also reduces the complexity of pipeline connections and improves the overall efficiency of the system. The center line of the condenser 1 is strictly aligned with the axis of the steam turbine 2, ensuring the smooth flow of steam. At the same time, it is also convenient for the installation and maintenance of equipment. In the layout structure on the first floor, the beam columns on both sides of the condenser are asymmetrically arranged, enabling more equipment to be placed on the first floor.

[0028] The condensate pump 3 and the drain flash tank 14 are important components of the condenser 1 system. The condensate pump 3 is used to transport the condensed water to the boiler, while the drain flash tank 14 is used to collect and process the drain water in the system. In this design, the condensate pump 3 and the drain flash tank 14 are arranged in the condensate pump pit and the circulating water pump 4 area. This layout makes full use of the space in the plant and is also convenient for the centralized management and maintenance of equipment.

[0029] The vacuum extraction system 5 and the open cooling water system 6 are key auxiliary systems to ensure the normal operation of the condenser 1. The vacuum extraction system 5 maintains the vacuum state inside the condenser 1 through the vacuum pump set, thereby improving the condensation efficiency; the open cooling water system 6 provides cooling water for the condenser 1. In this design, these two systems are arranged in the area below ground level and gradually descend to the pump pit through the steel platform. This design not only saves space but also facilitates the inspection and maintenance of equipment.

[0030] The lubricating oil system of the main oil tank 18 is an important guarantee for the operation of the steam turbine 2. The lubricating oil system provides lubrication and cooling for key components such as the bearings and gears of the steam turbine 2. In this design, the lubricating oil system of the main oil tank 18 is arranged in the area below ground level and adjacent to the vacuum extraction system 5 and the open cooling water system 6. This layout facilitates centralized management and maintenance, and at the same time reduces the complexity of the pipelines.

[0031] To facilitate the inspection and maintenance of equipment, single-rail cranes are installed at the beam bottom in both the open pump area and the vacuum pump area in this design. The installation of the single-rail crane greatly improves the convenience of equipment inspection, reduces the labor intensity of manual handling, and at the same time improves the inspection efficiency.

[0032] In the layout structure of the first floor, the design of gradually descending to the pump pit through the steel platform not only saves space but also provides convenience for the inspection of equipment. The width and height of the steel platform are carefully designed to ensure that maintenance personnel can reach each equipment area safely and conveniently.

[0033] The layout structure of the second floor The layout structure of the second floor is another important area of the main power house, mainly responsible for the layout of the auxiliary equipment of the steam turbine 2. Specifically as follows: The gland heater 7 is used to heat the gland steam of the steam turbine 2 to ensure the normal operation of the gland system; the oil purification device is used to remove impurities in the lubricating oil to ensure the cleanliness of the lubricating oil. In this design, the gland heater 7 and the oil purification device are arranged on the 3.9m floor and connected to the equipment area on the first floor through the steel platform. This layout not only saves space but also facilitates the centralized management and maintenance of equipment.

[0034] The jacking oil pump 8 and the duplex oil filter 9 are key equipment during the start-up and shutdown processes of the steam turbine 2. The jacking oil pump 8 is used to provide jacking oil during the start-up and shutdown of the steam turbine 2 to reduce the friction between the journal and the bearing; the duplex oil filter 9 is used to filter impurities in the lubricating oil. In this design, the jacking oil pump 8 and the duplex oil filter 9 are arranged on the 3.9m floor and adjacent to the gland heater 7 and the oil purification device. This layout facilitates the centralized management and maintenance of equipment, and at the same time reduces the complexity of the pipelines.

[0035] The oil cooler is used to cool the lubricating oil to ensure that the temperature of the lubricating oil is within the normal range; the main oil tank 18 is used to store the lubricating oil. In this design, the oil cooler and the main oil tank 18 are arranged on the 3.9m floor and are connected to the lubricating oil system of the main oil tank 18 on the first floor through a steel platform. This layout not only saves space but also facilitates the centralized management and maintenance of the equipment.

[0036] The accumulator 20 is used to store hydraulic energy to ensure that the system can provide sufficient pressure within a short period of time; the generator 12 air cooler 10 is used to cool the generator 12 to ensure the normal operation of the generator 12. In this design, the accumulator 20 and the generator 12 air cooler 10 are arranged on the 3.9m floor and are adjacent to the oil cooler and the main oil tank 18. This layout facilitates the centralized management and maintenance of the equipment and also reduces the complexity of the pipelines.

[0037] The air cooler 10 is an important part of the cooling system of the steam turbine 2 and is used to cool the lubricating oil and cooling water of the steam turbine 2. In this design, the air cooler 10 is arranged inside the steam turbine 2 platform and is connected to the equipment area on the second floor through a steel platform. This layout not only saves space but also facilitates the centralized management and maintenance of the equipment. There is a certain space left below the air cooler 10 for placing chemical equipment, making the overall space more compact.

[0038] To facilitate the overhaul and maintenance of the equipment, a steel platform is set on the 3.9m floor in this design. The steel platform extends to the position of the air cooler 10 to facilitate the overhaul of the air cooler 10 valves. At the same time, the design of the steel ladder enables the maintenance personnel to reach the overhaul area in the generator 12 wind chamber safely and conveniently. The width and height of the steel platform and the steel ladder are carefully designed to ensure the safety and convenience of the maintenance personnel.

[0039] The generator 12 enclosed busbar is an important electrical equipment connecting the generator 12 and the main transformer. In this design, the generator 12 enclosed busbar is connected to the south main transformer through the layout structure on the second floor. The main transformer is close to the main plant building, and the south wall serves as the firewall of the main transformer. This layout not only saves space but also improves the safety of the system.

[0040] Layout structure on the third floor The layout structure on the third floor is the highest area of the main plant building and mainly undertakes the layout of the steam turbine 2 and the generator 12. Specifically as follows: The medium and low pressure bypass pipeline 11 is an important part of the steam turbine 2 system and is used to regulate the steam flow during the startup and shutdown processes of the steam turbine 2 to ensure the stable operation of the system. In this design, the medium and low pressure bypass pipeline 11 is arranged on the third floor and is connected to the steam turbine 2 and the generator 12 through a pipeline bridge. This layout not only saves space but also facilitates the centralized management and maintenance of the equipment.

[0041] The steam turbine 2 and the generator 12 are the core equipment in the main power plant building, and their layout positions and arrangements have a crucial impact on the operating efficiency of the entire power plant. In this design, the steam turbine 2 and the generator 12 are arranged on the third floor and connected to the equipment area on the second floor through a steel platform. This layout not only saves space but also facilitates the centralized management and maintenance of the equipment.

[0042] The thermal control electronics room 13 is the core area of the power plant's automatic control system and is used to monitor and control the operation of the entire power plant. In this design, the thermal control electronics room 13 is arranged on the third floor and connected to each equipment area through cable trays. This layout not only saves space but also facilitates the centralized management and maintenance of the equipment.

[0043] In this design, by reasonably planning the functional areas of each floor and optimizing the equipment layout, the space utilization rate is greatly improved. The compact layout not only saves land resources but also reduces the length of the connecting pipes between the equipment, improving the overall efficiency of the system. Steel platforms and steel ladders are provided on each floor of this design to facilitate the inspection and maintenance of the equipment. At the same time, by setting single-rail cranes under the beams in the open pump area and the vacuum pump area, the convenience of equipment maintenance is further improved. These designs greatly reduce the labor intensity of manual handling and improve the maintenance efficiency. In this design, the south wall also serves as the firewall for the main transformer, improving the safety of the system. At the same time, by reasonably arranging the equipment and pipes, the mutual interference between the equipment is reduced, further improving the reliability of the system. Sufficient space is reserved on each floor of this design to facilitate the future expansion and upgrade of the equipment. This flexible design not only improves the adaptability of the system but also provides guarantee for the future development of the power plant.

[0044] Example 2: Refer to Figures 1 to 4 , a compact layout structure of the main power plant building for the steam turbine and generator 12 group, and the layout structure on the first floor As one of the core areas of the entire main power plant building, the layout structure on the first floor mainly undertakes the layout tasks of the condenser 1 and related auxiliary equipment. The condenser 1, as a key equipment in the steam turbine 2 system, its main function is to condense the steam discharged from the steam turbine 2 into water, thus realizing the efficient conversion of thermal energy into mechanical energy. In this design, the condenser 1 is arranged inside the steam turbine 2. The advantage of this arrangement is not only to save space but also to reduce the complexity of pipe connections, thereby improving the overall efficiency of the system. At the same time, the center line of the condenser 1 is strictly aligned with the axis of the steam turbine 2, which ensures the smoothness of steam flow and also provides convenient conditions for the installation and maintenance of the equipment.

[0045] The thermal control electronics room located on the third floor is arranged vertically downward to the excitation room 19 on the second floor and the switchgear room 17 on the first floor, and static electricity floors are provided in the thermal control electronics room.

[0046] The condensate pump 3 and the drain expansion vessel 14 are also important components of the condenser 1 system. The main responsibility of the condensate pump 3 is to transport the condensed water to the boiler, while the drain expansion vessel 14 is used to collect and process the drain water in the system. In this design, they are arranged in the condensate pump pit and the circulating water pump 4 area. Such a layout makes full use of the space in the plant and is convenient for the centralized management and maintenance operation of the equipment.

[0047] The vacuum extraction system 5 and the open water system 6 are key auxiliary systems to ensure the normal operation of the condenser 1. The vacuum extraction system 5 maintains the vacuum state in the condenser 1 through the vacuum pump group to improve the condensation efficiency; the open water system 6 provides cooling water for the condenser 1. In this design, these two systems are arranged in the area below ground level and gradually descend to the pump pit through the steel platforms. This design not only saves space but also facilitates the maintenance and repair work of the equipment.

[0048] The lubricating oil system of the main oil tank 18 is an important guarantee facility for the operation of the steam turbine 2. The lubricating oil system provides lubrication and cooling functions for key components such as the bearings and gears of the steam turbine 2. In this design, the lubricating oil system of the main oil tank 18 is arranged in the area below ground level and is adjacent to the vacuum extraction system 5 and the open water system 6. Such a layout is conducive to centralized management and maintenance, reduces the complexity of the pipelines, and improves the stability and reliability of the system.

[0049] To further facilitate the maintenance and repair of the equipment, single-rail cranes under the beam bottom are installed in both the open pump area and the vacuum pump area in this design. The installation of the single-rail cranes greatly improves the convenience of equipment maintenance, effectively reduces the labor intensity of manual handling, improves the maintenance efficiency, ensures that the equipment can be maintained and serviced in a timely manner, and thus guarantees the normal operation of the entire system.

[0050] In addition, the design of gradually descending to the pump pit through the steel platforms in the first-floor layout structure not only saves space but also provides convenient conditions for the maintenance of the equipment. The width and height of the steel platforms have been carefully designed and calculated, fully considering the operation space and safety requirements of the maintenance personnel, ensuring that the maintenance personnel can safely and conveniently reach each equipment area for efficient maintenance and repair work.

[0051] Second-floor layout structure The layout structure on the second floor is another important area of the main power plant, mainly responsible for the layout of the auxiliary equipment of the steam turbine 2. The gland heater 7 is used to heat the gland steam of the steam turbine 2 to ensure the normal operation of the gland system; the oil purification device is used to remove impurities in the lubricating oil to ensure the cleanliness of the lubricating oil, thus providing guarantee for the stable operation of the steam turbine 2. In this design, the gland heater 7 and the oil purification device are arranged on the 3.9m floor and connected to the equipment area on the first floor through a steel platform. This layout not only saves space but also facilitates the centralized management and maintenance of the equipment, improving the efficiency and convenience of equipment management.

[0052] The jacking oil pump 8 and the duplex oil filter 9 are key equipment during the startup and shutdown processes of the steam turbine 2. The main function of the jacking oil pump 8 is to provide jacking oil when the steam turbine 2 starts up and shuts down, thereby reducing the friction between the journal and the bearing and protecting the surfaces of the journal and the bearing; the duplex oil filter 9 is used to filter impurities in the lubricating oil to ensure the quality of the lubricating oil. In this design, the jacking oil pump 8 and the duplex oil filter 9 are arranged on the 3.9m floor and adjacent to the gland heater 7 and the oil purification device. Such a layout facilitates the centralized management and maintenance of the equipment, and at the same time reduces the complexity of the pipeline, reduces the potential risks brought by pipeline connection, and improves the stability and reliability of the system.

[0053] The oil cooler is used to cool the lubricating oil to ensure that the temperature of the lubricating oil is within the normal range, thus ensuring the performance of the lubricating oil and the normal operation of the steam turbine 2; the main oil tank 18 is used to store the lubricating oil, providing an adequate oil source for the entire lubricating oil system. In this design, the oil cooler and the main oil tank 18 are arranged on the 3.9m floor and connected to the lubricating oil system of the main oil tank 18 on the first floor through a steel platform. This layout not only saves space but also facilitates the centralized management and maintenance of the equipment, which is conducive to timely discovering and handling problems in the lubricating oil system and ensuring the stable operation of the system.

[0054] The accumulator 20 is used to store hydraulic energy to ensure that the system can provide sufficient pressure within a short period of time to cope with emergencies or temporary needs of the equipment; the air cooler 10 of the generator 12 is used to cool the generator 12 to ensure the normal operation of the generator 12 and prevent failures caused by overheating. In this design, the accumulator 20 and the air cooler 10 of the generator 12 are arranged on the 3.9m floor and adjacent to the oil cooler and the main oil tank 18. This layout facilitates the centralized management and maintenance of the equipment, and at the same time reduces the complexity of the pipeline, improves the stability and reliability of the system, and ensures that the equipment can operate efficiently and stably.

[0055] The air cooler 10 is an important part of the cooling system of the steam turbine 2, which is used to cool the lubricating oil and cooling water of the steam turbine 2 to ensure the normal operating temperature of the steam turbine 2. In this design, the air cooler 10 is arranged inside the platform of the steam turbine 2 and is connected to the equipment area on the second floor through a steel platform. This layout not only saves space but also facilitates the centralized management and maintenance of equipment, which is beneficial to improving the operating efficiency and maintenance efficiency of the equipment.

[0056] To further facilitate the overhaul and maintenance of equipment, a steel platform is set on the 3.9m floor in this design, and the steel platform is extended to the location of the air cooler 10 to facilitate the overhaul of the air cooler 10 valves. At the same time, the design of the steel ladder enables maintenance personnel to reach the overhaul area in the air chamber of the generator 12 safely and conveniently. The width and height of the steel platform and the steel ladder have been carefully designed and calculated, fully considering the operating space and safety requirements of maintenance personnel to ensure that maintenance personnel can carry out overhaul and maintenance work efficiently and safely.

[0057] The enclosed busbar of the generator 12 is an important electrical equipment connecting the generator 12 and the main transformer, and its main function is to transmit the electric energy generated by the generator 12 to the main transformer safely and efficiently. In this design, the enclosed busbar of the generator 12 is connected to the main transformer on the south side through the layout structure on the second floor. The main transformer is close to the main plant building, and the south wall serves as the firewall of the main transformer. This layout not only saves space but also improves the safety of the system, ensures the safe operation of electrical equipment, and is also convenient for the management and maintenance of equipment.

[0058] Layout structure on the third floor The layout structure on the third floor is the highest area of the main plant building, mainly responsible for the layout of the steam turbine 2 and the generator 12. The medium and low pressure bypass pipeline 11 is an important part of the steam turbine 2 system, and its main function is to adjust the steam flow during the start-up and shutdown processes of the steam turbine 2 to ensure the stable operation of the system. In this design, the medium and low pressure bypass pipeline 11 is arranged on the third floor and is connected to the steam turbine 2 and the generator 12 through a pipeline bridge. This layout not only saves space but also facilitates the centralized management and maintenance of equipment, which is beneficial to improving the operating efficiency and maintenance efficiency of the system.

[0059] As the core equipment of the main plant building, the layout positions and layouts of the steam turbine 2 and the generator 12 have a crucial impact on the operating efficiency of the entire power plant. In this design, the steam turbine 2 and the generator 12 are arranged on the third floor and are connected to the equipment area on the second floor through a steel platform. This layout not only saves space but also facilitates the centralized management and maintenance of equipment, which is beneficial to improving the operating efficiency and maintenance efficiency of the equipment and also ensures the safe operation of the equipment.

[0060] The thermal control electronics room 13 is the core area of the power plant automation control system, and its main function is to monitor and control the operation of the entire power plant. In this design, the thermal control electronics room 13 is arranged on the third floor and is connected to each equipment area through cable trays. This layout not only saves space but also facilitates the centralized management and maintenance of equipment, which is beneficial to improving the operation efficiency and maintenance efficiency of the system. At the same time, it also ensures the safe operation of the system. The thermal control electronics room 13 is equipped with static electricity floors.

[0061] This design has the advantage of a compact layout. By reasonably planning the functional areas of each floor and optimizing the equipment layout, the space utilization rate is greatly improved. The compact layout not only saves land resources and reduces construction costs but also reduces the length of the connecting pipes between equipment, reduces the pipe resistance, improves the overall efficiency of the system, and at the same time reduces the potential risks brought by pipe connections, improving the stability and reliability of the system.

[0062] In terms of maintenance convenience, this design has steel platforms and steel ladders installed on each floor, providing convenient conditions for equipment maintenance and repair. At the same time, by installing single-rail cranes under the beams in the open pump area and the vacuum pump area, the convenience of equipment maintenance is further improved, effectively reducing the labor intensity of manual handling, improving the maintenance efficiency, ensuring that the equipment can be maintained and serviced in a timely manner, and thus ensuring the normal operation of the entire system.

[0063] Safety is also one of the important considerations in this design. In this design, the south wall also serves as the main transformer firewall, which improves the safety of the system, effectively prevents damage to the main transformer caused by accidents such as fires, and ensures the safe operation of electrical equipment. At the same time, by reasonably arranging equipment and pipes, the mutual interference between equipment is reduced, further improving the reliability of the system, reducing the failure risk during equipment operation, and ensuring the safe and stable operation of the entire system.

[0064] In the layout structure on the third floor, the layout inside the casing of steam turbine 2 is relatively loose. In the southwest corner of the layout structure on the third floor, there is a maintenance site of 13m×6m in the air above, and the traveling crane arranged at 17m facilitates the vertical transportation of large equipment materials such as the generator 12 on the 3rd floor and the rotor of steam turbine 2. The thermal control electronics room 13 is located in the southwest corner of the main plant building. 7. A compact layout structure of the main plant building with a rear-mounted steam turbine 2 according to claim 6, characterized in that, in the layout structure on the third floor, the large equipment condenser 1 and steam turbine 2 are arranged between A2 / A3 (8.5m wheelbase) and 2 / 3 axis (9.2m wheelbase), and the maintenance area of the rotor of steam turbine 2 is located on the east side of the pedestal of steam turbine 2. 8. A compact layout structure of the main plant building with a rear-mounted steam turbine 2 according to claim 7, characterized in that, in the layout structure on the third floor, the generator 12 is arranged between A1 / A2 (8.2m wheelbase) and 2 / 3 axis (9.2m wheelbase) adjacent to the maintenance space 16, facilitating the maintenance of the generator 12. 9. A compact layout structure of the main plant building with a rear-mounted steam turbine 2 according to claim 8, characterized in that, on the south side of the generator 12 in the layout structure on the third floor is the maintenance area of the rotor of the generator 12, and on the layout structure on the third floor, there are inspection holes for the main oil tank 18, condensate pump 3, and circulating water butterfly valve, facilitating the external transportation and repair of equipment on the 3.9m and 0m floors. A compact layout structure of the main plant building with a rear-mounted steam turbine 2 according to claim 1 or 9, characterized in that, the occupied area of the plant building index is 708.7㎡, the thermal engine index is 0.0136㎡ / kW, the in-plant maintenance space 16 is 102.7㎡, accounting for 14.49% of the total floor area of the plant building.

[0065] In the layout structure on the third floor, the layout inside the casing of steam turbine 2 is relatively loose. This design provides sufficient space for the operation and maintenance of equipment, avoiding difficulties in equipment maintenance caused by narrow space. In the southwest corner of the layout structure on the third floor, there is a maintenance site of 13m×6m in the air above, providing a dedicated area for the maintenance of large equipment and ensuring the safety and convenience of maintenance work. The traveling crane arranged at 17m facilitates the vertical transportation of large equipment materials such as the generator 12 on the 3rd floor and the rotor of steam turbine 2, effectively improving the efficiency of equipment transportation and reducing potential safety hazards during transportation. The thermal control electronics room 13 is located in the southwest corner of the main plant building. This location selection is conducive to the monitoring and management of the entire plant building, ensuring the stable operation of the system.

[0066] In the layout structure on the third floor, the large equipment condenser 1 and steam turbine 2 are arranged between A2 / A3 (8.5m wheelbase) and 2 / 3 axis (9.2m wheelbase). This layout method makes the connection between equipment more compact, reduces the length of pipelines, and improves the overall efficiency of the system. The maintenance area of the rotor of steam turbine 2 is located on the east side of the pedestal of steam turbine 2. This location setting facilitates maintenance personnel to maintain and repair the rotor of steam turbine 2, improving the efficiency of maintenance.

[0067] The stairwell 15 in the main plant building and the tube extraction space on the water side of the condenser 1 are both arranged outdoors, making the space inside the plant building more compact.

[0068] In the layout structure on the third floor, the generator 12 is arranged between the A1 / A2 (8.2m axle distance) and the 2 / 3 axis (9.2m axle distance) near the maintenance space 16. This layout makes the generator 12 adjacent to the maintenance space 16, facilitating the maintenance and repair work of the generator 12, reducing the equipment movement during the maintenance process, and improving the convenience of maintenance.

[0069] On the south side of the generator 12 in the layout structure on the third floor is the rotor maintenance area of the generator 12. This design provides a dedicated area for the maintenance of the rotor of the generator 12, ensuring the safety and convenience of the maintenance work. On the layout structure on the third floor, there are inspection holes for the main oil tank 18, condensate pump 3, and circulating water butterfly valve. The setting of these inspection holes facilitates the external transportation and repair of equipment on the 3.9m and 0m floors, improves the efficiency of equipment maintenance, and reduces the equipment downtime.

[0070] The occupied area of the plant building is 708.7 ㎡, and the heat engine index is 0.0136 ㎡ / kW. The setting of this index ensures the space utilization efficiency of the plant building and meets the layout requirements of heat engine equipment. The in-plant maintenance space is 102.7 ㎡, accounting for 14.49% of the total floor area of the plant building. The setting of this proportion provides sufficient space for the maintenance of in-plant equipment, ensuring the convenience and safety of equipment maintenance.

[0071] For those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

Claims

1. A compact rear-mounted steam turbine main plant layout structure, characterized in that: It includes a three-story layout structure. The first floor layout structure includes the condenser arranged in the turbine, the condensate pump and the drain expansion tank arranged in the condensate pump pit and the circulating water pump, in which a vacuum system, an open water system and a main oil tank lubricating oil system are set up, which are gradually lowered to the pump pit through a steel platform. The second floor layout structure includes a shaft seal heater, an oil purification device, a top shaft oil pump and a double oil filter, and is equipped with an oil cooler, a main oil tank, an accumulator and an air cooler. The air cooler is arranged in the turbine platform. The third floor layout structure includes medium and low pressure bypass pipelines, steam turbines, generators and thermal control electronics rooms.

2. A compact rear-mounted steam turbine main plant layout structure according to claim 1, characterized in that: In the first floor layout structure, monorail cranes are installed at the bottom of the beams in the open pump area and the vacuum pump area. The open circulating water pump, vacuum pump and electric water filter in the first floor layout structure are inspected and maintained by the monorail cranes.

3. A compact rear-mounted steam turbine main plant layout structure according to claim 2, characterized in that: In the layout structure of the first floor, the beams and columns on both sides of the condenser are set asymmetrically, so that more equipment can be placed on the first floor.

4. A compact rear-mounted steam turbine main plant layout structure according to claim 1 or 3, characterized in that: The second floor is arranged in a 3.9m structure. When the steel platform reaches the air cooler position, the air cooler valve can be inspected. The steel ladder can reach the maintenance area in the generator wind room. There is a certain amount of space under the air cooler to place chemical equipment.

5. A compact rear-mounted steam turbine main plant layout structure according to claim 4, characterized in that: The generator enclosed busbar is connected to the main transformer on the south side through the second-floor layout structure. The main transformer is close to the main plant building, and the south wall of the second-floor layout structure serves as the main transformer fire wall.

6. A compact rear-mounted steam turbine main plant layout structure according to claim 1 or 5, characterized in that: The layout of the turbine casing in the third floor layout structure is relatively spacious. A 13m×6m overhead maintenance area is arranged in the southwest corner of the third floor layout structure to facilitate the vertical transportation of large equipment materials such as the 3-story generator and turbine rotor. The thermal control electronics room is located in the southwest corner of the main plant.

7. A compact rear-mounted steam turbine main plant layout structure according to claim 6, characterized in that: The condenser and steam turbine are arranged in the structure on the third floor. The turbine rotor maintenance area is located on the east side of the turbine base. The excitation room on the second floor and the distribution room on the first floor are arranged vertically downward in the thermal control electronics room on the third floor. An electrostatic floor is installed in the thermal control electronics room.

8. A compact rear-mounted steam turbine main plant layout structure according to claim 7, characterized in that: In the layout structure of the third floor, the generator is arranged near the maintenance space to facilitate the maintenance of the generator.

9. A compact rear-mounted steam turbine main plant layout structure according to claim 8, characterized in that: The south side of the generator within the third floor layout structure is the generator rotor maintenance area, which is also equipped with inspection holes for the main oil tank, condensate pump and circulating water butterfly valve to facilitate the transportation and repair of equipment on the first and second floors.

10. A compact rear-mounted steam turbine main plant layout structure according to claim 1 or 9, characterized in that: The stairwell of the main powerhouse and the condenser water side extraction pipe space are both arranged outdoors.

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