Steam turbine power generation system
By eliminating the bypass condenser and using a shut-off valve to connect the desuperheating and pressure-reducing bypass to the main turbine circuit, the problems of increased land occupation and investment in the steam turbine power generation system were solved, and the normal operation of the equipment and prevention of corrosion and scaling were achieved.
Patent Information
- Application Number
- CN202520523697.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-24
AI Technical Summary
The inclusion of bypass condensers in existing steam turbine power generation systems increases the power plant's floor space and equipment investment, and the bypass system is prone to corrosion, scaling, and damage if it is not used for a long time.
The bypass condenser was eliminated, and a shut-off valve was used to connect the desuperheating and pressure reducing bypass in parallel with the turbine main line. During maintenance, the steam enters the condenser through the desuperheating and pressure reducing bypass, thus eliminating the bypass condenser, reducing land occupation and investment, and avoiding damage from long-term shutdown.
This reduces the floor space required for power plant construction and equipment investment, avoids equipment corrosion and scaling damage, and ensures normal system operation.
Smart Images
Figure CN223724688U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a steam turbine power generation system. BACKGROUND
[0002] The steam turbine power generation system adopts circulating water cooling, is directly connected with the condenser through the pipeline at the steam exhaust port of the steam turbine, is provided with a steam temperature and pressure reducing bypass parallelly connected with the steam turbine, and is communicated with the bypass condenser. Under the normal operation of the steam turbine power generation system, steam enters the steam turbine generator set to generate power, exhaust steam is discharged from the steam exhaust port of the steam turbine, enters the condenser, is condensed into condensed water, and returns to the boiler system. When the steam turbine needs to be overhauled, the steam enters the bypass condenser after being reduced in temperature and pressure by the bypass, is condensed into condensed water, and the condensed water is recycled. However, the configuration of the bypass condenser in the power generation system increases the floor area of the power plant, leads to the increase of equipment and civil engineering investment, and in addition, the bypass system is not used in normal times and is in a long-term inactivated state, so that the equipment is prone to corrosion and scaling and damage. SUMMARY
[0003] The utility model aims at solving one of the technical problems in the related art at least to some extent.
[0004] Therefore, the embodiment of the utility model provides a steam turbine power generation system, cancels the bypass condenser in the related art, reduces the floor area of the power plant, reduces the equipment and civil engineering investment, and the cut-off valve is arranged on the main path of the steam turbine and is simultaneously in the open operation with the main path of the steam turbine, so that the long-term inactivated state does not occur, so that the equipment is not damaged due to the long-term inactivation.
[0005] The steam turbine power generation system according to the embodiment of the utility model comprises a steam turbine main path, a temperature and pressure reducing bypass, a condenser and a cut-off valve, the inlet of the temperature and pressure reducing bypass and the inlet of the steam turbine main path are used for communicating with a steam source, the outlet of the temperature and pressure reducing bypass and the outlet of the steam turbine main path are communicated with the inlet of the condenser, and the cut-off valve is arranged between the outlet of the steam turbine main path and the inlet of the condenser.
[0006] The steam turbine power generation system according to the embodiment of the utility model cancels the bypass condenser in the related art, reduces the floor area of the power plant, reduces the equipment and civil engineering investment, and the cut-off valve is arranged on the main path of the steam turbine and is simultaneously in the open operation with the main path of the steam turbine, so that the long-term inactivated state does not occur, so that the equipment is not damaged due to the long-term inactivation.
[0007] In some embodiments, the cut-off valve is an electric vacuum butterfly valve or an electric gate valve.
[0008] In some embodiments, the condenser is a water-cooled condenser.
[0009] In some embodiments, the steam turbine power generation system further comprises a first pipeline, one end of the first pipeline being in communication with the outlet of the turbine main path, the other end of the first pipeline being in communication with the inlet of the condenser, and the shut-off valve being arranged on the first pipeline.
[0010] In some embodiments, the steam turbine power generation system further comprises a second pipeline, one end of the second pipeline being in communication with the outlet of the desuperheating and pressure reducing bypass, the other end of the second pipeline being in communication with the first pipeline, and the other end of the second pipeline being located downstream of the shut-off valve.
[0011] In some embodiments, the first pipeline has a length of 1.5-2.1 m.
[0012] In some embodiments, the turbine main path comprises a turbine and a first valve, the first valve being arranged at the inlet of the turbine, the inlet of the first valve forming the inlet of the turbine main path, and the outlet of the turbine forming the outlet of the turbine main path.
[0013] In some embodiments, the desuperheating and pressure reducing bypass comprises a desuperheating and pressure reducing device and a second valve, the second valve being arranged at the inlet of the desuperheating and pressure reducing device, and the inlet of the second valve forming the inlet of the desuperheating and pressure reducing bypass.
[0014] In some embodiments, the desuperheating and pressure reducing bypass further comprises a third valve, the third valve being arranged at the outlet of the desuperheating and pressure reducing device, and the outlet of the third valve forming the outlet of the desuperheating and pressure reducing bypass. BRIEF DESCRIPTION OF DRAWINGS
[0015] Fig. 1 FIG. 1 is a schematic diagram of a steam turbine power generation system according to an embodiment of the present application;
[0016] Fig. 2 FIG. 2 is a schematic diagram of a turbine, a shut-off valve and a condenser according to an embodiment of the present application;
[0017] REFERENCE NUMERALS:
[0018] Steam turbine power generation system 100, turbine 1, desuperheating and pressure reducing device 2, condenser 3, shut-off valve 4, first pipeline 5, second pipeline 6, first valve 7, second valve 8, and third valve 9. DETAILED DESCRIPTION
[0019] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.
[0020] The following will be described with reference to the accompanying drawingsFigs. 1-2 The steam turbine power generation system 100 of the embodiment of the utility model is shown in detail.
[0021] The steam turbine power generation system 100 of the embodiment of the utility model comprises a turbine main path, a temperature and pressure reducing bypass, a condenser 3 and a cut-off valve 4.The inlet of the temperature and pressure reducing bypass and the inlet of the turbine main path are both used for communicating with a steam source, the outlet of the temperature and pressure reducing bypass and the outlet of the turbine main path are both communicated with the inlet of the condenser 3, and the cut-off valve 4 is arranged between the outlet of the turbine main path and the inlet of the condenser 3.
[0022] The steam turbine power generation system 100 further comprises a boiler, and the boiler generates steam, and the inlet of the turbine main path and the inlet of the temperature and pressure reducing bypass are both communicated with the steam outlet of the boiler.
[0023] When the turbine 1 is normally operated, the cut-off valve 4 is in an open state, the temperature and pressure reducing bypass is in a disconnected state, steam enters the turbine main path through the steam inlet, and after power generation in the turbine main path, exhaust steam is discharged from the outlet of the turbine main path into the condenser 3 and is condensed into condensed water.When the turbine main path needs to be opened for maintenance, the cut-off valve 4 is closed, the communication between the outlet of the turbine main path and the inlet of the condenser 3 is disconnected, steam enters the temperature and pressure reducing bypass, and after being cooled and decompressed by the temperature and pressure reducing bypass, the steam enters the condenser 3 and is condensed into condensed water.The condensed water after condensation of the condenser 3 is recycled to the boiler.
[0024] Compared with the related art, the steam turbine power generation system 100 of the embodiment of the utility model connects the temperature and pressure reducing bypass in parallel with the turbine main path, connects the outlet of the temperature and pressure reducing bypass with the condenser 3 located downstream of the turbine main path, and condenses the steam after the temperature and pressure reducing bypass by the condenser 3 downstream of the turbine main path, that is, the bypass condenser in the related art is cancelled, and one set of condenser 3 is used to condense the steam discharged from the turbine main path during normal operation and condense the steam discharged from the temperature and pressure reducing bypass during maintenance, so that the land occupation area of the steam turbine power generation system 100 is reduced, the land occupation demand of the steam turbine power generation system 100 on the power plant is reduced, the equipment and civil engineering investment of the steam turbine power generation system 100 is reduced, and the problem of corrosion and scaling damage caused by long-term non-use of the bypass condenser 3 in the related art is avoided.
[0025] Therefore, the steam turbine power generation system 100 of the embodiment of the utility model cancels the bypass condenser in the related art, reduces the land occupation area of the power plant, reduces the equipment and civil engineering investment, and the cut-off valve 4 is located on the turbine main path and is in an open operation state at the same time, so that the situation of long-term non-use does not occur, and the cut-off valve 4 is not damaged due to long-term non-use.
[0026] Specifically, the steam turbine power generation system 100 of this utility model embodiment includes a boiler, a steam turbine main line, a desuperheating and pressure reducing bypass, a condenser 3, a shut-off valve 4, a first pipeline 5, and a second pipeline 6.
[0027] The boiler outlet connects to the inlet of the main turbine circuit and the inlet of the desuperheating and pressure reducing bypass. The main turbine circuit is the main circuit of the steam turbine power generation system 100, and the desuperheating and pressure reducing bypass is the desuperheating and pressure reducing bypass of the steam turbine power generation system 100.
[0028] The main turbine circuit includes turbine 1 and first valve 7. First valve 7 is located at the inlet of turbine 1, forming the inlet of the main turbine circuit. The outlet of turbine 1 forms the outlet of the main turbine circuit. The outlet of turbine 1 is the exhaust steam outlet of turbine 1.
[0029] The first valve 7 controls the connection between the inlet of the steam turbine 1 and the outlet of the boiler. During normal operation of the steam turbine 1, the first valve 7 is open, allowing steam to enter the turbine 1 and generate electricity. During maintenance of the steam turbine 1, the first valve 7 is closed, disconnecting the inlet of the steam turbine 1 from the outlet of the boiler.
[0030] The outlet of the steam turbine 1 is connected to one end of the first pipeline 5, and the other end of the first pipeline 5 is connected to the inlet of the condenser 3. The shut-off valve 4 is installed on the first pipeline 5.
[0031] Specifically, the cross-sectional shape of the first pipe 5 is rectangular, for example, a pipe with a diameter of 2700*1300mm.
[0032] Furthermore, condenser 3 is a water-cooled condenser 3. For example... Fig. 2 As shown, the water-cooled condenser is located below the steam turbine 1. The minimum distance required between the water-cooled condenser and the steam turbine 1 is small, thereby further saving the power plant floor space required for the steam turbine power generation system 100 of this utility model embodiment.
[0033] Furthermore, the length of the first conduit 5 is 1.5-2.1m. For example, the length of the first conduit 5 is 1.7m, 1.8m, 1.9m or 2.0m.
[0034] In this embodiment, the length of the first pipeline 5 is 1.8m.
[0035] The shut-off valve 4 is an electrically operated vacuum butterfly valve or an electrically operated slide gate valve. This valve can be connected to the control unit of the steam turbine power generation system 100 for remote control of its opening and closing, making operation convenient. Furthermore, the electrically operated vacuum butterfly valve or slide gate valve has good sealing performance, preventing air leakage and ensuring the vacuum level of the condenser 3, thereby guaranteeing the cooling effect of the condenser 3. At the same time, the electrically operated vacuum butterfly valve and slide gate valve can be installed and operated in a relatively small space.
[0036] The temperature and pressure reducing bypass comprises the temperature and pressure reducing device 2, the second valve 8 and the third valve 9. The second valve 8 is arranged at the inlet of the temperature and pressure reducing device 2, and the inlet of the second valve 8 forms the inlet of the temperature and pressure reducing bypass. The third valve 9 is arranged at the outlet of the temperature and pressure reducing device 2, and the outlet of the third valve 9 forms the outlet of the temperature and pressure reducing bypass.
[0037] The second valve 8 is arranged at the inlet of the temperature and pressure reducing device 2, and the third valve 9 is arranged at the outlet of the temperature and pressure reducing device 2. When the steam turbine 1 is in operation, the second valve 8 and the third valve 9 are closed, and the temperature and pressure reducing bypass is disconnected. When the steam turbine 1 is under maintenance, the second valve 8 and the third valve 9 are opened, and the steam flows through the temperature and pressure reducing bypass.
[0038] One end of the second pipeline 6 is communicated with the outlet of the temperature and pressure reducing device 2, and the third valve 9 is arranged on the second pipeline 6. The other end of the second pipeline 6 is communicated with the first pipeline 5, and the other end of the second pipeline 6 is located downstream of the cut-off valve 4. The temperature and pressure reducing bypass is connected to the first pipeline 5 through the second pipeline 6.
[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0040] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features.
[0041] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0042] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0043] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.
[0044] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A steam turbine power generation system (100) characterized by, The turbine main path, the temperature and pressure reducing bypass, the condenser (3) and the cut-off valve (4) are included, the inlet of the temperature and pressure reducing bypass and the inlet of the turbine main path are used to communicate with the steam source, the outlet of the temperature and pressure reducing bypass and the outlet of the turbine main path are communicated with the inlet of the condenser (3), and the cut-off valve (4) is arranged between the outlet of the turbine main path and the inlet of the condenser (3).
2. The steam turbine power generating system (100) of claim 1, characterized by The cut-off valve (4) is an electric vacuum butterfly valve or an electric gate valve.
3. The steam turbine power generating system (100) of claim 1, characterized by, The condenser (3) is a water-cooled condenser (3).
4. The steam turbine power system (100) of claim 1, wherein, Further comprising a first pipeline (5), one end of the first pipeline (5) is communicated with the outlet of the turbine main path, and the other end of the first pipeline (5) is communicated with the inlet of the condenser (3), and the cut-off valve (4) is arranged on the first pipeline (5).
5. The steam turbine power system (100) of claim 4, characterized by Further comprising a second pipeline (6), one end of the second pipeline (6) is communicated with the outlet of the temperature and pressure reducing bypass, and the other end of the second pipeline (6) is communicated with the first pipeline (5), and the other end of the second pipeline (6) is located downstream of the cut-off valve (4).
6. The steam turbine power system (100) of claim 4, characterized by The length of the first pipeline (5) is 1.5-2.1m.
7. The steam turbine power system (100) of claim 1, wherein, The turbine main path includes a turbine (1) and a first valve (7), the first valve (7) is arranged at the inlet of the turbine (1), the inlet of the first valve (7) forms the inlet of the turbine main path, and the outlet of the turbine (1) forms the outlet of the turbine main path.
8. The steam turbine power system (100) of claim 1, wherein, The temperature and pressure reducing bypass includes a temperature and pressure reducing device (2) and a second valve (8), the second valve (8) is arranged at the inlet of the temperature and pressure reducing device (2), and the inlet of the second valve (8) forms the inlet of the temperature and pressure reducing bypass.
9. The steam turbine power system (100) of claim 8, characterized by The temperature and pressure reducing bypass further comprises a third valve (9), the third valve (9) is arranged at the outlet of the temperature and pressure reducing device (2), and the outlet of the third valve (9) forms the outlet of the temperature and pressure reducing bypass.