Steam turbine dead steam heat exchange device for thermal power plant

Abstract

The invention belongs to the technical field of thermal power generation, and relates to a thermal power plant steam turbine dead steam heat exchange device which comprises a boiler, and a dead steam treatment mechanism is mounted on one side of the boiler. The boiler generates high-temperature and high-pressure steam to drive the steam turbine to rotate, heat energy is converted into mechanical energy, the mechanical energy is transmitted to the generator through a coupler, a generator rotor rotates in a magnetic field, electric energy is generated through electromagnetic induction, dead steam generated by the steam turbine is distributed to the heat exchange assembly through a gas conveying pipe, and heat energy is recycled through primary and deep heat exchange and then cooled. And during the period, the water pump is used for assisting water drainage, the smooth proceeding of the water drainage process is ensured, and the condensed water can enter the boiler again to be recycled after being treated, or other treatments are carried out according to actual needs.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal power generation, and in particular relates to an exhaust steam heat exchange device for a steam turbine in a thermal power plant. Background Art

[0002] Thermal power plants primarily generate heat by burning fossil fuels (such as coal, oil, and natural gas), which is then converted into mechanical energy and ultimately into electrical energy through generators. The steam turbine, a core component of this process, operates by expanding high-temperature, high-pressure steam through nozzles or blades to generate work, thereby driving the turbine's rotation. As the steam expands and generates work in the turbine's stages, its pressure and temperature gradually decrease, ultimately forming low-pressure, low-temperature steam, known as exhaust steam.

[0003] After searching, the existing patent (application number: CN204006089U) discloses a heat exchange system for exhaust steam from a steam turbine in a thermal power plant, comprising a steam distribution straight pipe, a first steam distribution conical pipe, a heat exchange device, a second steam distribution conical pipe and two flanges. The steam distribution straight pipe is connected to the small diameter end of the first steam distribution conical pipe, the large diameter end of the first steam distribution conical pipe is connected to one side of the heat exchange device through a first flange, the other side of the heat exchange device is connected to the large diameter end of the second steam distribution conical pipe through a second flange, and the small diameter end of the second steam distribution conical pipe is connected to the inlet end of the air-cooling island. The heat exchange device comprises an outer shell, an insulation layer, a main heat exchange pipe and a plurality of auxiliary heat exchange pipes. The main heat exchange pipe and the plurality of auxiliary heat exchange pipes are installed in the outer shell, and the main heat exchange pipe and the plurality of auxiliary heat exchange pipes are connected to the outside of the main heat exchange pipe and the plurality of auxiliary heat exchange pipes with heat dissipation fins. This system makes full use of the thermal energy in the exhaust steam of the steam turbine, does not require additional fuel consumption, saves energy, does not affect the environment, and has a simple structure. In the process of realizing this patent, the inventor found that the prior art has the following problems:

[0004] Existing thermal power plant turbine exhaust steam heat exchangers, if the heat energy in the exhaust steam is not released promptly and effectively, can cause the internal temperature of the heat exchanger to overheat, resulting in thermal stress. Over time, this thermal stress can cause equipment deformation, cracking, or even failure. Existing heat exchangers also have limitations, which can prevent the heat energy in the exhaust steam from being fully recovered and utilized. This directly reduces the thermal efficiency of the entire power generation system, increases fuel consumption, and ultimately increases operating costs.

[0005] Therefore, in order to solve the above problems, a thermal power plant steam turbine exhaust steam heat exchange device is proposed. Summary of the Invention

[0006] The purpose of the present invention is to solve the defects and shortcomings in the prior art and to design a heat exchange device for exhaust steam from a steam turbine in a thermal power plant.

[0007] To achieve the above-mentioned object, the technical solution adopted by the present invention is: a thermal power plant steam turbine exhaust steam heat exchange device, comprising a boiler, an exhaust steam treatment mechanism installed on one side of the boiler;

[0008] A turbine body is nested on one side of the boiler, a coupling is nested on one side of the turbine body, a generator is nested on the other side of the coupling, a first gas pipe is nested on one side of the outside of the turbine body, a first distribution cone pipe is nested on the other side of the first gas pipe, a heat exchange component is nested on the other side of the first distribution cone pipe, a first processor is embedded in the interior of the heat exchange component, a second gas pipe is nested on the top of the first processor, a second distribution cone pipe is nested on the other side of the second gas pipe, a condenser is nested on the other side of the second distribution cone pipe, a second processor is embedded in the interior of the condenser, a drain pipe is nested on one side of the second processor, and a water pump is nested on one side of the drain pipe.

[0009] Preferably, a cooling water tank is nested on one side of the first processor, a pump body is nested on one side of the cooling water tank, a water pipe is embedded in the interior of the pump body, and a sprinkler tray is nested on one end of the water pipe.

[0010] Preferably, the coupling is used together with the turbine body.

[0011] Preferably, the cross-sections of the first distribution tapered tube and the second distribution tapered tube are tapered.

[0012] Preferably, the first processor is installed inside the heat exchange component.

[0013] Preferably, the second processor is installed inside the condenser.

[0014] Preferably, the drain pipe is installed between the second processor and the boiler.

[0015] Preferably, the sprinkler tray is movably mounted on the outside of the water pipe.

[0016] After adopting the above technical solution, the exhaust steam heat exchange device for a steam turbine in a thermal power plant provided by the present invention has the following beneficial effects:

[0017] The present invention recovers and utilizes the heat energy in the exhaust steam by setting up an exhaust steam treatment mechanism to improve energy utilization efficiency. By starting the boiler, it generates high-temperature and high-pressure steam, which enters the steam turbine body, thereby driving the steam turbine body to rotate, realizing the conversion of heat energy into mechanical energy. At the same time, the rotor of the steam turbine body is connected to the rotor of the generator through a coupling, and the mechanical energy is transmitted to the generator. The generator rotor rotates in the magnetic field and converts the mechanical energy into electrical energy through electromagnetic induction. At the same time, the exhaust steam generated by the steam turbine body in this process is transported to the subsequent treatment structure through the first gas transmission pipe and enters the first distribution cone pipe. It is initially distributed through its special cone structure to ensure that the exhaust steam can flow evenly and stably. Enter the heat exchange component. Inside the heat exchange component, the first processor performs preliminary heat exchange treatment on the exhaust steam to extract part of the heat energy therein. The exhaust steam that has undergone preliminary treatment enters the second distribution cone through the second gas pipeline for further distribution. Under the continuous action of the heat exchange component, the heat energy in the exhaust steam is fully recovered and utilized, and the temperature is further reduced. The low-temperature exhaust steam then enters the condenser and is condensed under the action of the second processor and finally converted into liquid water. The condensed water is discharged through the drain pipe. During this period, the water pump is used to assist drainage to ensure the smooth progress of the drainage process. The condensed water can be treated and then enter the boiler again for recycling, or undergo other treatments according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a steam turbine exhaust steam heat exchange device for a thermal power plant according to the present invention;

[0019] Figure 2 It is a structural schematic diagram of the cooling water tank in the present invention;

[0020] Figure 3 for Figure 1 A in the middle is an enlarged structural diagram;

[0021] Figure 4 for Figure 1 Enlarged structural diagram at point B in the middle.

[0022] Among them: 1. Boiler; 2. Exhaust steam treatment mechanism; 3. Steam turbine body; 4. Coupling; 5. Generator; 6. First gas pipe; 7. First distribution cone; 8. Heat exchange component; 9. First processor; 10. Second gas pipe; 11. Second distribution cone; 12. Condenser; 13. Second processor; 14. Drain pipe; 15. Water pump; 16. Cooling water tank; 17. Pump body; 18. Water pipe; 19. Sprinkler tray. DETAILED DESCRIPTION

[0023] The present invention will be further described clearly and completely below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments described are only some, not all, of the embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention, its application, or use. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0026] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0028] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0029] Example 1

[0030] As attached Figure 1 、 3 -4 shows a thermal power plant steam turbine exhaust steam heat exchange device, comprising a boiler 1, with an exhaust steam treatment mechanism 2 installed on one side of the boiler 1; a turbine body 3 is nested on one side of the boiler 1, a coupling 4 is nested on one side of the turbine body 3, a generator 5 is nested on the other side of the coupling 4, a first gas pipeline 6 is nested on one side of the outside of the turbine body 3, a first distribution cone 7 is nested on the other side of the first gas pipeline 6, a heat exchange component 8 is nested on the other side of the first distribution cone 7, a first processor 9 is embedded in the heat exchange component 8, a second gas pipeline 10 is nested on the top of the first processor 9, a second distribution cone 11 is nested on the other side of the second gas pipeline 10, a condenser 12 is nested on the other side of the second distribution cone 11, a second processor 13 is embedded in the condenser 12, a drain pipe 14 is nested on one side of the second processor 13, and a water pump 15 is nested on one side of the drain pipe 14.

[0031] Among them: by starting the boiler 1, it generates high-temperature and high-pressure steam, which enters the turbine body 3, thereby driving the turbine body 3 to rotate, realizing the conversion of thermal energy into mechanical energy. At the same time, the rotor of the turbine body 3 is connected to the rotor of the generator 5 through the coupling 4, and the mechanical energy is transmitted to the generator 5. The rotor of the generator 5 rotates in the magnetic field and converts the mechanical energy into electrical energy through electromagnetic induction. At the same time, in this process, the exhaust steam generated by the turbine body 3 is transported to the subsequent processing structure through the first gas transmission pipe 6 and enters the first distribution cone 7. It is preliminarily distributed through its special cone structure to ensure that the exhaust steam can flow into the heat exchange component 8 evenly and stably. Inside the heat exchange component 8, the exhaust steam is transported to the heat exchange component 8 evenly and stably. A processor 9 performs preliminary heat exchange treatment on the exhaust steam to extract part of the heat energy therein. The exhaust steam after preliminary treatment enters the second distribution cone 11 through the second gas pipeline 10 for further distribution. Under the continuous action of the heat exchange component 8, the heat energy in the exhaust steam is fully recovered and utilized, and the temperature is further reduced. The low-temperature exhaust steam then enters the condenser 12 and is condensed under the action of the second processor 13 and finally converted into liquid water. The condensed water is discharged through the drain pipe 14. During this period, the water pump 15 is used to assist drainage to ensure the smooth progress of the drainage process. The condensed water can be treated and then enter the boiler 1 again for recycling, or undergo other treatments according to actual needs.

[0032] Example 2

[0033] Based on the first embodiment, the solution in the first embodiment is further detailed in combination with the following specific working methods, as described below:

[0034] like Figure 2 As shown, as a preferred embodiment; a cooling water tank 16 is nested on one side of the first processor 9, a pump body 17 is nested on one side of the cooling water tank 16, a water pipe 18 is embedded in the interior of the pump body 17, and a sprinkler plate 19 is nested on one end of the water pipe 18. Furthermore, when the first processor 9 processes the exhaust steam and recovers heat energy, its surface temperature will increase. The cooling water evenly sprayed by the sprinkler plate 19 can effectively cool the first processor 9, and then flow back to the cooling water tank 16 for recycling or further processing.

[0035] The working process of this patent is as follows:

[0036] When the thermal power plant steam turbine exhaust steam heat exchange device is in use, the boiler 1 is started to generate high-temperature and high-pressure steam, and the steam enters the turbine body 3, thereby driving the turbine body 3 to rotate, realizing the conversion of thermal energy into mechanical energy. At the same time, the rotor of the turbine body 3 is connected to the rotor of the generator 5 through the coupling 4, and the mechanical energy is transmitted to the generator 5. The rotor of the generator 5 rotates in the magnetic field and converts the mechanical energy into electrical energy through electromagnetic induction. At the same time, in this process, the exhaust steam generated by the turbine body 3 is transported to the subsequent processing structure through the first gas transmission pipe 6 and enters the first distribution cone 7. It is preliminarily distributed through its special cone structure to ensure that the exhaust steam can flow into the heat exchange component 8 evenly and stably. Inside the heat exchange component 8, the first processor 9 performs preliminary heat exchange processing on the exhaust steam to extract part of the heat energy therein. The first processor 9 processes the exhaust steam and When recovering heat energy, its surface temperature will increase. The cooling water evenly sprayed by the sprinkler plate 19 can effectively cool the first processor 9, and then flow back to the cooling water tank 16 for recycling or further treatment. The exhaust steam that has been preliminarily treated enters the second distribution cone 11 through the second gas pipe 10 for further distribution. Under the continuous action of the heat exchange component 8, the heat energy in the exhaust steam is fully recovered and utilized, and the temperature is further reduced. The low-temperature exhaust steam then enters the condenser 12 and is condensed under the action of the second processor 13, and finally converted into liquid water. The condensed water is discharged through the drain pipe 14. During this period, the water pump 15 is used to assist drainage to ensure the smooth progress of the drainage process. The condensed water can be treated and then enter the boiler 1 again for recycling, or undergo other treatments according to actual needs. This is the working process and working principle of the device.

[0037] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A steam turbine exhaust steam heat exchange device for a thermal power plant, comprising a boiler (1), characterized in that: A spent steam treatment mechanism (2) is installed on one side of the boiler (1); A steam turbine body (3) is nested and installed on one side of the boiler (1), a coupling (4) is nested and installed on one side of the steam turbine body (3), a generator (5) is nested and installed on the other side of the coupling (4), a first gas pipeline (6) is nested and installed on one side of the outside of the steam turbine body (3), a first distribution cone pipe (7) is nested and installed on the other side of the first gas pipeline (6), a heat exchange component (8) is nested and installed on the other side of the first distribution cone pipe (7), and a heat exchange component (8) is embedded and installed inside the heat exchange component (8). A first processor (9), wherein a second air supply pipe (10) is nested on the top of the first processor (9), a second distribution conical pipe (11) is nested on the other side of the second air supply pipe (10), a condenser (12) is nested on the other side of the second distribution conical pipe (11), a second processor (13) is embedded in the interior of the condenser (12), a drain pipe (14) is nested on one side of the second processor (13), and a water pump (15) is nested on one side of the drain pipe (14).

2. The exhaust steam heat exchange device for a steam turbine in a thermal power plant according to claim 1, characterized in that: A cooling water tank (16) is nested on one side of the first processor (9), a pump body (17) is nested on one side of the cooling water tank (16), a water pipe (18) is embedded in the interior of the pump body (17), and a watering plate (19) is nested on one end of the water pipe (18).

3. The exhaust steam heat exchange device for a steam turbine in a thermal power plant according to claim 1, characterized in that: The coupling (4) is used together with the steam turbine body (3).

4. The exhaust steam heat exchange device for a steam turbine in a thermal power plant according to claim 1, characterized in that: The cross-sectional shapes of the first distribution tapered tube (7) and the second distribution tapered tube (11) are tapered.

5. The exhaust steam heat exchange device for a steam turbine in a thermal power plant according to claim 1, characterized in that: The first processor (9) is installed inside the heat exchange component (8).

6. The exhaust steam heat exchange device for a steam turbine in a thermal power plant according to claim 1, characterized in that: The second processor (13) is installed inside the condenser (12).

7. The exhaust steam heat exchange device for a steam turbine in a thermal power plant according to claim 1, characterized in that: The drainage pipe (14) is installed between the second processor (13) and the boiler (1).

8. The exhaust steam heat exchange device for a steam turbine in a thermal power plant according to claim 2, characterized in that: The watering plate (19) is movably installed outside the water delivery pipe (18).

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