Main power house of thermal power plant
By rationally arranging steam turbines, condensers, water supply pumps, deaerators and high-pressure heaters in the main factory building of the thermal power plant, the problems of large area occupied by the main factory building and poor maintenance and passage conditions are solved, and the effect of shortening the pipeline length and reducing the power consumption of the water supply pump is achieved.
Patent Information
- Application Number
- CN202420629161.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The layout of the main factory buildings of the existing thermal power plants leads to a large area. The water supply pump and water supply pump turbine occupy a single span of the steam room, the low-pressure water supply pipeline is arranged for a long time, and the maintenance and transportation conditions are poor.
A first steam turbine, a first condenser, a second steam turbine, a second condenser and a water supply pump are set up in the steam room, and the deaerator and a high-pressure heater are arranged in the middle of the deaerator, and the deaerator and a water supply pump are connected through a low-pressure water supply pipe, and the water supply pump and a high-pressure heater are connected through a high-pressure water supply pipe.
The length of the low-pressure water supply pipe between the deaerator and the water supply pump and the high-pressure water supply pipe between the water supply pump and the high-pressure heater is shortened, which reduces the area occupied, reduces the power consumption of the water supply pump, and simplifies the maintenance and passage conditions.
Smart Images
Figure CN222881148U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of thermal power generation, and in particular to a main plant building of a thermal power plant. Background Art
[0002] A thermal power plant is a factory that uses coal, oil, and natural gas as fuel to produce electricity. The production process of a thermal power plant is as follows: the fuel burns in the boiler, heating the water in the boiler, turning the water in the boiler into steam. The steam pressure drives the turbine to rotate, and the main steam turbine drives the generator to rotate, converting mechanical energy into electrical energy.
[0003] In the common layout of the main plant building of a thermal power plant with a feedwater pump turbine equipped with an independent condenser, the feedwater pump and the feedwater pump turbine are installed on the head side of the main steam turbine, and the feedwater pump and the feedwater pump turbine separately occupy one span of the steam engine room, resulting in a larger occupied area of the main plant building of the thermal power plant, the low-pressure feedwater pipeline between the deaerator and the feedwater pump inlet is long, the pipeline has a large slope, the maintenance access conditions are poor, and the distance between the high-pressure feedwater pipeline at the feedwater pump outlet and the high-pressure heater is far. Summary of the invention
[0004] Based on this, it is necessary to provide a main plant building of a thermal power plant to reduce the occupied area of the main plant building of the thermal power plant.
[0005] A main plant building of a thermal power plant, comprising:
[0006] Steam engine room;
[0007] Deaeration room;
[0008] A first steam turbine, a first condenser, a second steam turbine, a second condenser and a feed water pump are arranged in the steam engine room, wherein the first steam turbine has a generator, and the second steam turbine and the feed water pump are arranged in the middle of the generator on the side facing the deaerator room; and
[0009] A deaerator and a high-pressure heater, wherein the deaerator and the high-pressure heater are arranged in the middle of the deaerator room;
[0010] Among them, the first steam turbine, the first condenser, the deaerator, the feed water pump and the high-pressure heater are connected to form a first circulation loop, and the second steam turbine, the second condenser, the deaerator, the feed water pump and the high-pressure heater are connected to form a second circulation loop.
[0011] In one embodiment, the first steam turbine is arranged along the length direction of the steam turbine room, the second steam turbine is arranged along the length direction of the steam turbine room, and the axial direction of the first steam turbine is parallel to the axial direction of the second steam turbine.
[0012] In one embodiment, the main plant building of the thermal power plant also includes a low-pressure heater, which is arranged in the deaerator room, a water inlet of the low-pressure heater is connected to the first condenser and the second condenser, and a water outlet of the low-pressure heater is connected to the deaerator.
[0013] In one embodiment, the deaerator room is provided with a first intermediate layer, a first operating layer, a heater layer and a deaerator layer from bottom to top along its height direction, the low-pressure heater is provided with multiple stages, the multi-stage low-pressure heaters are respectively arranged in the first intermediate layer, the first operating layer and the throat of the first condenser, the multi-stage high-pressure heaters are respectively arranged in the first operating layer and the heater layer, and the deaerator is arranged in the deaerator layer.
[0014] In one embodiment, the steam engine room is provided with a second intermediate layer and a second operating layer from bottom to top along its height direction, the second intermediate layer and the first intermediate layer are located at the same height, and the second operating layer and the first operating layer are located at the same height; the first steam turbine is arranged on the second operating layer, the first condenser is arranged below the first steam turbine, the second steam turbine is arranged on the second intermediate layer, the second condenser is arranged below the second steam turbine, and the feed water pump is arranged on the second intermediate layer.
[0015] In one embodiment, the main plant of the thermal power plant also includes a first condensate pump and a second condensate pump, the first condensate pump and the second condensate pump are arranged in the steam engine room, the water inlet of the first condensate pump is connected to the first condenser, and the water outlet of the first condensate pump is connected to the low-pressure heater; the water inlet of the second condensate pump is connected to the second condenser, and the water outlet of the second condensate pump is connected to the low-pressure heater.
[0016] In one embodiment, the first condensate pump and the second condensate pump are arranged side by side along the length direction of the steam engine room, and the first condensate pump is arranged on a side of the second condenser away from the deaerator room.
[0017] In one of the embodiments, the feed water pump and the second steam turbine are staggered along the length direction of the turbine house, and the axial direction of the feed water pump is parallel to the axial direction of the second steam turbine.
[0018] In one embodiment, a first water tank and a second water tank are provided at the bottom of the steam engine room, the first water tank is provided below the first steam turbine and the first condenser, the second water tank is provided below the second steam turbine, the second condenser and the feed water pump, and the first water tank is connected to the second water tank.
[0019] In one of the embodiments, the main plant of the thermal power plant further includes a sewage pump, and a water inlet of the sewage pump is connected to the first water tank through a sewage pipe.
[0020] In the main plant of the thermal power plant mentioned above, the deaerator is connected to the water inlet of the feed water pump through a low-pressure feed water pipeline, and the water outlet of the feed water pump is connected to the high-pressure heater through a high-pressure feed water pipeline. In the process of arranging the main plant of the thermal power plant, the deaerator and the high-pressure heater are arranged in the middle of the deaerator room, and the feed water pump and the second steam turbine are arranged in the middle of the generator side facing the deaerator room. In this way, the length of the low-pressure feed water pipeline between the deaerator and the feed water pump and the high-pressure feed water pipeline between the feed water pump and the high-pressure heater can be shortened, and the occupied area can be reduced. The small machine circulating water pit and the main machine circulating water pit are integrated and centrally arranged, and drainage is considered uniformly, and no sewage pump for the small machine circulating water pit is provided. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a top view of the main building of a thermal power plant according to an embodiment of the present application.
[0022] Figure 2 for Figure 1 A cross-sectional view of the main plant building of the thermal power plant.
[0023] Description of Figure Numbers:
[0024] 10. Steam engine room; 11. Second intermediate layer; 12. Second operating layer; 13. First water tank; 14. Second water tank; 20. Deaerator room; 21. First intermediate layer; 22. First operating layer; 23. Heater layer; 24. Deaerator layer; 30. First steam turbine; 31. Generator; 32. First condenser; 33. Second steam turbine; 34. Second condenser; 35. Feed water pump; 36. First condensate pump; 37. Second condensate pump; 40. Deaerator; 41. High-pressure heater; 42. Low-pressure heater. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0026] See also Figure 1 An embodiment of the present application provides a main plant building of a thermal power plant, and the main plant building of the thermal power plant includes a steam engine room 10 and a deoxidation room 20.
[0027] It should be noted that the relative positions of the steam engine room 10 and the deaerator room 20 can be set according to actual needs. Figure 1 The steam engine room 10 and the deaerator room 20 are arranged front and back.
[0028] See also Figure 1 and Figure 2 The main plant of the thermal power plant further includes a first steam turbine 30, a first condenser 32, a second steam turbine 33, a second condenser 34 and a feed water pump 35, and the first steam turbine 30, the first condenser 32, the second steam turbine 33, the second condenser 34 and the feed water pump 35 are arranged in the steam turbine room 10. Specifically, the first steam turbine 30 has a generator 31, and the feed water pump 35 and the second steam turbine 33 are arranged in the middle of the generator 31 on the side facing the deaerator room 20.
[0029] In this embodiment, the feed water pump 35 and the second steam turbine 30 are staggered along the length direction of the turbine house 10 , and the axial direction of the feed water pump 35 is parallel to the axial direction of the second steam turbine 30 .
[0030] See also Figure 1 and Figure 2 The main plant of the thermal power plant further includes a deaerator 40 and a high-pressure heater 41 , and the deaerator 40 and the high-pressure heater 41 are arranged in the middle of the deaerator room 20 .
[0031] Optionally, the high-pressure heater 41 is provided with multiple stages, and the multi-stage high-pressure heater 41 heats the water discharged from the deaerator 40, which is beneficial to improving the heating effect.
[0032] Among them, see Figure 1 The first steam turbine 30, the first condenser 32, the deaerator 40, the feed water pump 35 and the high-pressure heater 41 are connected to form a first circulation loop, and the second steam turbine 33, the second condenser 34, the deaerator 40, the feed water pump 35 and the high-pressure heater 41 are connected to form a second circulation loop.
[0033] Specifically, see Figure 1, the deaerator 40 is connected to the water inlet of the feed water pump 35 through the low-pressure feed water pipeline, and the water outlet of the feed water pump 35 is connected to the high-pressure heater 41 through the high-pressure feed water pipeline. In the process of arranging the main plant of the thermal power plant, the deaerator 40 and the high-pressure heater 41 are arranged in the middle of the deaerator room 20, and the feed water pump 35 and the second steam turbine 33 are arranged in the middle of the generator 31 on the side facing the deaerator room 20, so that the length of the low-pressure feed water pipeline between the deaerator 40 and the feed water pump 35 and the high-pressure feed water pipeline between the feed water pump 35 and the high-pressure heater 41 can be shortened, the running resistance of the feed water pipeline is reduced, the power consumption of the feed water pump 35 is reduced, and the cost required for the feed water pipeline can also be reduced. In addition, the low-pressure feed water pipeline between the deaerator 40 and the feed water pump 35 is short and smooth, which reduces the occupied space, and the pipeline elevation across the deaerator room 20 passage is high, which is convenient for maintenance.
[0034] See also Figure 1 In order to meet the layout space of the second steam turbine 33 and the second condenser 34, the distance between the span AB of the steam turbine room 10 can be increased by one meter. Compared with the existing increase in width of about ten meters in the head direction of the steam turbine room 10, the main power plant of the thermal power plant in this embodiment can reduce the volume of the steam turbine room 10 and save the civil construction cost. Among them, A is located on the side of the steam turbine room 10 away from the deaerator room 20, and B is located on the side where the steam turbine room 10 is connected to the deaerator room 20 and is arranged opposite to A.
[0035] In one embodiment, see Figure 1 The first steam turbine 30 is arranged along the length direction of the steam turbine room 10, and the second steam turbine 33 is arranged along the length direction of the steam turbine room 10, and the axial direction of the first steam turbine 30 is parallel to the axial direction of the second steam turbine 33. Such an arrangement is conducive to reducing the occupied area, making the layout of the steam turbine room 10 more compact, and facilitating the maintenance of various equipment in the steam turbine room 10.
[0036] In one embodiment, see Figure 1 and Figure 2 The main plant of the thermal power plant also includes a low-pressure heater 42, which is arranged in the deaerator room 20. The water inlet of the low-pressure heater 42 is connected to the first condenser 32 and the second condenser 34, and the water outlet of the low-pressure heater 42 is connected to the deaerator 40. When in use, the steam generated by the boiler is sent to the first steam turbine 30 and the second steam turbine 33 to do work, and then the steam is discharged into the first condenser 32 and the second condenser 34 to condense into water, and the condensed water absorbs heat through the low-pressure heater 42. In this way, by setting the low-pressure heater 42, the low-pressure heater 42 is used to heat the condensed water flowing out of the first condenser 32 and the second condenser 34.
[0037] Optionally, the low-pressure heater 42 is provided with multiple stages, and the multiple-stage low-pressure heater 42 heats the condensed water discharged from the first condenser 32 and the second condenser 34 , which is beneficial to improving the heating effect.
[0038] In one embodiment, see Figure 1 and Figure 2 The main plant of the thermal power plant further includes a first condensate pump 36 and a second condensate pump 37, which are arranged in the steam engine room 10. The water inlet of the first condensate pump 36 is connected to the first condenser 32, and the water outlet of the first condensate pump 36 is connected to the low-pressure heater 42. The water inlet of the second condensate pump 37 is connected to the second condenser 34, and the water outlet of the second condensate pump 37 is connected to the low-pressure heater 42. When in use, the first condensate pump 36 pumps the condensate after passing through the first condenser 32 into the deaerator 40 through the low-pressure heater 42, and the second condensate pump 37 pumps the condensate after passing through the second condenser 34 into the deaerator 40 through the low-pressure heater 42, so that the water level of the hot wells of the first condenser 32 and the second condenser 34 can be maintained stable, and the amount of water in the deaerator 40 can be guaranteed.
[0039] In this embodiment, refer to Figure 1 The first condensate pump 36 and the second condensate pump 37 are arranged side by side along the length direction of the steam engine room 10 , and the first condensate pump 36 is arranged on the side of the second condenser 34 .
[0040] In one embodiment, see Figure 2 The steam turbine room 10 is provided with a second intermediate layer 11 and a second operating layer 12 from bottom to top along its height direction. The first steam turbine 30 is arranged on the second operating layer 12, and the first condenser 32 is arranged below the first steam turbine 30. The second steam turbine 33 is arranged on the second intermediate layer 11, and the second condenser 34 is arranged below the second steam turbine 33. The feed water pump 35 is arranged on the second intermediate layer 11. In this way, by dividing the steam turbine room 10 into the second intermediate layer 11 and the second operating layer 12, it is beneficial to reduce the space occupied, comprehensively divide the functions, and facilitate the connection between various equipment.
[0041] In one embodiment, see Figure 2The deaerator room 20 is provided with a first intermediate layer 21, a first operating layer 22, a heater layer 23 and a deaerator layer 24 from bottom to top along its height direction. The multi-stage low-pressure heater 42 is respectively arranged in the first intermediate layer 21, the first operating layer 22 and the throat of the first condenser 32. The multi-stage high-pressure heater 41 is respectively arranged in the first operating layer 22 and the heater layer 23. The deaerator 40 is arranged in the deaerator layer 24. In this way, by dividing the deaerator room 20 into the first intermediate layer 21, the first operating layer 22, the heater layer 23 and the deaerator layer 24, it is beneficial to reduce the space occupied, comprehensively divide the functions, and facilitate the connection between the various equipment.
[0042] It should be noted that the first intermediate layer 21 and the second intermediate layer 11 are located at the same height, and the first operating layer 22 and the second operating layer 12 are located at the same height.
[0043] In this embodiment, the low-pressure heater 42 , the high-pressure heater 41 and the deaerator 40 are staggered along the length direction of the deaerator room 20 .
[0044] In one embodiment, see Figure 1 A first water tank 13 and a second water tank 14 are provided at the bottom of the steam engine room 10. The first water tank 13 is provided below the first steam turbine 30 and the first condenser 32, and the second water tank 14 is provided below the second steam turbine 33, the second condenser 34 and the feed water pump 35, and the first water tank 13 is connected to the second water tank 14.
[0045] Furthermore, the main plant of the thermal power plant further includes a sewage pump, and the water inlet of the sewage pump is connected to the first water tank 13 through a sewage pipe. In this way, the first water tank 13 and the second water tank 14 are integrated and centrally arranged, and the pit bottom elevation of the second water tank 14 is higher than the pit bottom elevation of the first water tank 13, so that the water in the second water tank 14 can be discharged to the first water tank 13 for storage, and then the sewage pump discharges the sewage in the first water tank 13. In this way, the sewage in the first water tank 13 and the second water tank 14 can be completely discharged by using the sewage pump of the first water tank 13, and there is no need to set a sewage pump in the second water tank 14, which reduces costs, and can also reduce the amount of civil construction and the construction period.
[0046] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0047] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0048] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0049] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.
[0051] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0052] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. A main plant of a thermal power plant, characterized in that: include: Steam engine room; Deaeration room; A first steam turbine, a first condenser, a second steam turbine, a second condenser and a feed water pump are arranged in the steam engine room, the first steam turbine is provided with a generator, and the second steam turbine and the feed water pump are arranged in the middle of the generator on the side facing the deaerator room; as well as, A deaerator and a high-pressure heater, wherein the deaerator and the high-pressure heater are arranged in the middle of the deaerator room; Among them, the first steam turbine, the first condenser, the deaerator, the feed water pump and the high-pressure heater are connected to form a first circulation loop, and the second steam turbine, the second condenser, the deaerator, the feed water pump and the high-pressure heater are connected to form a second circulation loop.
2. The main plant of a thermal power plant according to claim 1, characterized in that: The first steam turbine is arranged along the length direction of the steam turbine room, the second steam turbine is arranged along the length direction of the steam turbine room, and the axial direction of the first steam turbine is parallel to the axial direction of the second steam turbine.
3. The main plant of a thermal power plant according to claim 1, characterized in that: The main plant building of the thermal power plant also includes a low-pressure heater, which is arranged in the deaerator room. The water inlet of the low-pressure heater is connected to the first condenser and the second condenser, and the water outlet of the low-pressure heater is connected to the deaerator.
4. The main building of a thermal power plant according to claim 3, characterized in that: The deaerator is provided with a first intermediate layer, a first operating layer, a heater layer and a deaerator layer from bottom to top along its height direction. The low-pressure heater and the high-pressure heater are provided with multiple stages. The low-pressure heater is respectively arranged in the first intermediate layer, the first operating layer and the throat of the first condenser. The multiple stages of the high-pressure heater are respectively arranged in the first operating layer and the heater layer. The deaerator is arranged in the deaerator layer.
5. The main building of a thermal power plant according to claim 4, characterized in that: The turbine room is provided with a second intermediate layer and a second operating layer from bottom to top along its height direction, the second intermediate layer and the first intermediate layer are located at the same height, and the second operating layer and the first operating layer are located at the same height; The first steam turbine is arranged at the second operating layer, the first condenser is arranged below the first steam turbine, the second steam turbine is arranged at the second intermediate layer, the second condenser is arranged below the second steam turbine, and the feed water pump is arranged at the second intermediate layer.
6. The main building of a thermal power plant according to claim 3, characterized in that: The main plant building of the thermal power plant also includes a first condensate pump and a second condensate pump, which are arranged in the steam engine room. The water inlet of the first condensate pump is connected to the first condenser, and the water outlet of the first condensate pump is connected to the low-pressure heater; the water inlet of the second condensate pump is connected to the second condenser, and the water outlet of the second condensate pump is connected to the low-pressure heater.
7. The main building of a thermal power plant according to claim 6, characterized in that: The first condensate pump and the second condensate pump are arranged side by side along the length direction of the steam engine room, and the first condensate pump is arranged on a side of the second condenser away from the deaerator room.
8. The main plant building of a thermal power plant according to any one of claims 1 to 7, characterized in that: The feed water pump and the second steam turbine are staggered along the length direction of the steam turbine room, and the axial direction of the feed water pump is parallel to the axial direction of the second steam turbine.
9. The main building of a thermal power plant according to any one of claims 1 to 7, characterized in that: A first water tank and a second water tank are provided at the bottom of the steam engine room. The first water tank is provided below the first steam turbine and the first condenser, and the second water tank is provided below the second steam turbine, the second condenser and the feed water pump, and the first water tank is connected to the second water tank.
10. The main building of a thermal power plant according to claim 9, characterized in that: The main plant building of the thermal power plant also includes a sewage pump, and the water inlet of the sewage pump is connected to the first water tank through a sewage pipe.