Environment-friendly and energy-saving steam turbine system of thermal power plant

Abstract

The invention relates to the technical field of thermal power generation, and discloses a thermal power plant environment-friendly energy-saving steam turbine system which comprises a steam turbine, an air inlet in the top of the steam turbine is connected with an air inlet pipe, an inverted-cone-shaped water collecting funnel is arranged on the inner wall of the air inlet pipe, and the inner side wall of the water collecting funnel protrudes in the axis direction of the air inlet pipe to form a plurality of protruding parts; a plurality of vent holes are distributed in the convex part; the first generator is connected with the output end of the steam turbine; the condenser is communicated with a bottom air outlet of the steam turbine; one end of the water flow power generation mechanism is communicated with the water outlet end of the water collecting funnel through a connecting pipe, and the other end is communicated with the condenser. The multiple protruding parts are arranged on the inner side wall of the water collecting funnel in the axis direction of the air inlet pipe, the protruding parts are preferably in a circular arc shape, the multiple vent holes are distributed in the protruding parts and used for allowing water vapor to pass through, condensate water cannot flow above the vent holes, and therefore the possibility that the condensate water passes through the water collecting funnel is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and in particular to an environmentally friendly and energy-saving steam turbine system for a thermal power plant. Background Art

[0002] In modern thermal power generation, traditional steam turbine systems often have problems such as low energy utilization and serious environmental pollution. With increasingly stringent environmental regulations and increasing energy demand, how to improve the efficiency and environmental performance of steam turbine systems has become an urgent problem to be solved. In the existing technology, some improvement measures have improved the efficiency of the system to a certain extent, but there is still room for further improvement.

[0003] The patent with the publication number CN111022136A discloses a steam turbine energy-saving system, which inputs water vapor into the interior of the steam turbine through the air intake pipe, and the water vapor will adhere to the inner wall of the air intake pipe after condensation, and the condensed water flows into the interior of the water flow power generation mechanism along the air intake pipe. After the condensed water is collected, the condensed water is discharged, and the water flow power generation mechanism generates electricity through the gravitational potential energy generated by the condensed water flowing down, thereby achieving the purpose of energy saving. However, the patent still has the following defects: on the one hand, the guide plate is in an arc shape, and the lowest end of the guide plate is flush with the pipe mouth of the conduction pipe. After the water vapor condenses, the condensed water will slide down on the inner wall of the air intake pipe. The arc-shaped guide plate can better collect the condensed water, ensuring that the condensed water enters the interior of the conduction pipe better. However, the guide plate needs to be provided with air holes for the water vapor to pass through, and the condensed water can easily flow into the lower end of the air intake pipe through the air holes after being collected on the inner wall of the pipe. On the other hand, in this scheme, the condensed water is collected in the collection bottle through the control valve. When enough condensed water is collected, the gravitational potential energy of the water is converted into electricity generation and energy saving by opening the control valve. This requires real-time attention to the water level of the condensed water in the collection bottle during use and regular opening of the control valve, which makes the operation process cumbersome. Summary of the invention

[0004] The present invention aims to provide an environmentally friendly and energy-saving steam turbine system for a thermal power plant to overcome the above-mentioned shortcomings.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] An environmentally friendly and energy-saving steam turbine system for a thermal power plant, comprising:

[0007] A steam turbine, wherein the air inlet at the top of the steam turbine is connected to an air inlet pipe, an inverted cone-shaped water collecting funnel is arranged on the inner wall of the air inlet pipe, the inner side wall of the water collecting funnel protrudes toward the axis direction of the air inlet pipe to form a plurality of protrusions, and a plurality of vents are arranged on the protrusions;

[0008] a first generator connected to an output end of the steam turbine;

[0009] a condenser connected to the bottom air outlet of the steam turbine; and

[0010] The water flow power generation mechanism has one end connected to the water outlet end of the water collecting funnel through a connecting pipe, and the other end connected to the condenser.

[0011] Furthermore, the raised portion is a raised arc plate, and a plurality of the vent holes are arranged on the arc plate.

[0012] Furthermore, the water flow power generation mechanism comprises:

[0013] A first water conduit having one end penetrating the air inlet pipe and connected to the output end of the water collecting funnel;

[0014] A collecting bottle fixedly mounted on the outside of the steam turbine, wherein the water inlet at the top of the collecting bottle is connected to the other end of the first water pipe, and the height of the other end of the first water pipe is lower than the height of one end of the first water pipe;

[0015] A second water conduit is inserted into the collecting bottle, the middle portion of the second water conduit passes through the side wall of the collecting bottle, and one end of the second water conduit is inserted downwardly into the inner bottom of the first water conduit, the other end of the second water conduit is located outside the collecting bottle and extends downward, and the height of the other end of the second water conduit is lower than the height of one end of the second water conduit; and

[0016] A power generation component has one end connected to the other end of the second water conduit, and the other end of the power generation component is connected to the condenser.

[0017] Furthermore, a venting pipe is provided on the top of the collecting bottle.

[0018] Furthermore, the power generation component comprises:

[0019] A shell fixedly mounted on the outer side wall of the steam turbine, the shell being arranged in a vertical direction, one end of the shell being connected to the other end of the second water conduit, the other end of the shell being connected to one end of a drain pipe, and the other end of the drain pipe being connected to the condenser;

[0020] A spiral blade installed in the housing, the spiral blade being capable of self-rotation under the impact of water flow; and

[0021] A second generator is fixedly mounted on the outer side wall of the steam turbine, and the second generator is drivingly connected to the spiral blade via a transmission belt.

[0022] Furthermore, the rotation axis of the spiral blade is parallel to the axis of the shell.

[0023] Furthermore, a support frame is arranged in the shell, the spiral blade is rotatably connected to the support frame, and the transmission belt passes through the shell.

[0024] Furthermore, the first water conduit is in a "crank" shape, including an integrally formed first vertical tube, a horizontal tube and a second vertical tube, the upper end of the first vertical tube is connected to the water outlet end of the water collecting funnel, and the lower end of the second vertical tube is connected to the condenser.

[0025] Furthermore, the second water conduit is in an "η" shape, and a shorter vertical section of the second water conduit is inserted into the collecting bottle.

[0026] Furthermore, the inner wall of the air intake pipe is smooth, and the outer wall of the air intake pipe is provided with a heat-insulating layer.

[0027] Compared with the prior art, the present invention has at least the following advantages:

[0028] The present invention provides a plurality of protrusions on the inner wall of the water collecting funnel toward the axial direction of the air inlet pipe. The protrusions are preferably arc-shaped. A plurality of ventilation holes are distributed on these protrusions. The ventilation holes are used to allow water vapor to pass through, and condensed water will not flow on the top, thereby reducing the possibility of condensed water passing through the water collecting funnel, and further reducing the amount of condensed water flowing into the lower end of the air inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 It is a schematic diagram of the overall structure of the environmentally friendly and energy-saving steam turbine system of a thermal power plant according to the present invention;

[0031] Figure 2 It is a cross-sectional view of the assembly of the gas collecting pipe and the water collecting funnel of the present invention;

[0032] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A area;

[0033] Figure 4 For the present invention Figure 1 A partial enlarged view of area B.

[0034] Figure numerals: 1. turbine; 2. air inlet pipe; 3. insulation layer; 4. water collecting funnel; 5. protrusion; 6. vent; 7. first generator; 8. condenser; 9. first water pipe; 10. collecting bottle; 11. second water pipe; 12. vent pipe; 13. shell; 14. spiral blade; 15. second generator; 16. transmission belt; 17. support frame. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figure 1 , the present invention relates to an environmentally friendly and energy-saving steam turbine system for a thermal power plant. The system achieves the purpose of improving energy utilization efficiency by optimizing the design and configuration of multiple key components. The specific structure includes a steam turbine, an air intake pipe 2, a water collecting funnel 4, a first generator 7, a condenser 8 and a water flow power generation mechanism. Among them, the steam turbine, as one of the core equipment of the entire system, is responsible for converting high-temperature and high-pressure steam into mechanical energy, and then driving the first generator 7 to generate electrical energy. The air intake pipe 2 is connected to the air intake at the top of the steam turbine, and is used to transport high-temperature and high-pressure steam generated by the boiler to the inside of the steam turbine. Combined with reference Figure 4, a water collecting funnel 4 is provided on the inner wall of the air inlet pipe 2, which is used to collect condensed water formed after water vapor condenses on the inner wall of the air inlet pipe 2. The water collecting funnel 4 is located on the inner side of the air inlet pipe 2, and has an inverted cone structure, which can effectively collect and guide the condensed water into the water flow power generation mechanism. A plurality of protrusions 5 are provided on the inner wall of the water collecting funnel 4 toward the axial direction of the air inlet pipe 2, and the protrusions 5 are preferably in an arc shape. A plurality of vents 6 are distributed on these protrusions 5, and the vents 6 are used to allow water vapor to pass through, while the condensed water will not flow above, thereby reducing the possibility of condensed water passing through the water collecting funnel 4, and further reducing the amount of condensed water flowing into the lower end of the air inlet pipe 2. The first generator 7 is directly connected to the output end of the steam turbine, and generates electricity by receiving mechanical energy converted by the steam turbine. The condenser 8 is installed at the bottom outlet of the steam turbine, and is mainly used to cool the low-pressure steam discharged from the steam turbine so that it can be condensed into liquid water again. In addition, the condenser 8 also plays a role in recovering waste heat, thereby improving the overall energy efficiency ratio. One end of the water flow power generation mechanism is connected to the water outlet end of the water collecting funnel 4 through a connecting pipe, and the other end is connected to the condenser 8. The water flow power generation mechanism uses the gravitational potential energy generated by the condensed water flow to generate electricity, thereby achieving the purpose of energy saving.

[0038] Optionally, the outer surface of the air inlet pipe 2 is covered with a heat-insulating material to reduce heat loss and keep the steam temperature stable.

[0039] Specifically, refer to Figure 2-3 The water flow power generation mechanism includes a first water pipe 9, a collecting bottle 10, a second water pipe 11 and a power generation assembly. The first water pipe 9 is in the shape of a "crank" and runs through the air inlet pipe 2 to transport the water collected by the water collecting funnel 4 to the collecting bottle 10. The collecting bottle 10 is fixedly installed on the outside of the steam turbine, and its top water inlet is connected to the other end of the first water pipe 9. The second water pipe 11 is arranged in an "η" shape, one end of which is inserted into the collecting bottle 10 and close to the bottom of the collecting bottle 10, and the other end extends to the outside of the collecting bottle 10 and extends downward. One end of the power generation assembly is connected to the other end of the second water pipe 11, and the other end is connected to the condenser 8.

[0040] In order to ensure that the pressure above the liquid surface in the collection bottle 10 is equal to the atmospheric pressure, the present invention is provided with an air release pipe 12 at the top of the collection bottle 10. When the condensed water on the air inlet pipe 2 is transported to the collection bottle 10 through the water collecting funnel 4 and the first water conduit 9, the liquid surface height of the condensed water in the collection bottle 10 will gradually rise. When the height of the condensed water is higher than the highest height of the second water conduit 11, the condensed water in the collection bottle 10 will be discharged through the second water conduit 11 under the action of atmospheric pressure until the liquid surface height of the condensed water in the collection bottle 10 is lower than the height of one end of the second water conduit 11.

[0041] Compared with the traditional method of controlling the height of condensed water using a solenoid valve, the present invention can realize automatic collection of condensed water, thereby reducing the condensed water level height monitoring link and achieving better automatic control effect.

[0042] The power generation assembly includes a shell 13 fixed on the outer wall of the steam turbine, a spiral blade 14, and a second generator 15 connected to the spiral blade 14. Specifically, the shell 13 is installed on the outer wall of the steam turbine and is arranged in the vertical direction. One end of the shell 13 is connected to the other end of the second water pipe 11, and the other end is connected to a drain pipe, which is connected to the condenser 8. The spiral blade 14 is installed in the shell 13. When water flows through the spiral blade 14, it will drive it to rotate. The second generator 15 is connected to the spiral blade 14 through a transmission belt 16. When the spiral blade 14 rotates, it drives the second generator 15 to work and generate additional electricity.

[0043] Optionally, a bracket specifically used for supporting the rotation of the spiral blade 14 is installed inside the housing 13 to ensure that the transmission belt 16 can run smoothly without interfering with the working conditions of other components.

[0044] This solution realizes the process of converting the gravitational potential energy of condensed water into electrical energy by relying on the condensed water formed on the intake pipe to drive the second generator to generate electricity, thereby providing another way to compensate for power generation.

[0045] Since the water collecting funnel is provided and a convex portion is formed on the water collecting funnel, the possibility of condensed water passing through the water collecting funnel can be effectively reduced.

[0046] Since the second water conduit is provided, the second water conduit is in an "η" shape, and can discharge the collected condensed water at one time when the water level in the water collecting bottle reaches a certain height, thereby reducing the setting of valves and water level monitoring devices.

[0047] In summary, the environmentally friendly and energy-saving steam turbine system for thermal power plants proposed in this patent makes innovative improvements to the traditional structure. While ensuring the power generation efficiency, it provides another way to compensate for power generation, thereby improving the power generation efficiency.

[0048] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do 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 should not be understood as a limitation on the present invention.

[0049] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An environmentally friendly and energy-saving steam turbine system for a thermal power plant, characterized in that: include: A steam turbine (1), wherein an air inlet at the top of the steam turbine is connected to an air inlet pipe (2), an inner wall of the air inlet pipe (2) is provided with an inverted cone-shaped water collecting funnel (4), an inner side wall of the water collecting funnel (4) protrudes toward the axial direction of the air inlet pipe (2) to form a plurality of protrusions (5), and a plurality of ventilation holes (6) are arranged on the protrusions (5); A first generator (7) connected to the output end of the steam turbine; a condenser (8) in communication with the bottom gas outlet of the steam turbine; as well as The water flow power generation mechanism has one end connected to the water outlet end of the water collecting funnel (4) through a connecting pipe, and the other end connected to the condenser.

2. The environmentally friendly and energy-saving steam turbine system for a thermal power plant according to claim 1 is characterized in that: The raised portion (5) is a raised arc plate, and a plurality of ventilation holes (6) are arranged on the arc plate.

3. The environmentally friendly and energy-saving steam turbine system for a thermal power plant according to claim 1 is characterized in that: The water flow power generation mechanism comprises: A first water guide pipe (9) having one end penetrating the air inlet pipe (2) and communicating with the output end of the water collecting funnel (4); A collecting bottle (10) fixedly mounted on the outside of the steam turbine, wherein a water inlet at the top of the collecting bottle (10) is connected to the other end of the first water conduit (9), and the height of the other end of the first water conduit (9) is lower than the height of one end of the first water conduit (9); A second water conduit (11) is inserted into the collecting bottle (10), the middle portion of the second water conduit (11) passes through the side wall of the collecting bottle (10), and one end of the second water conduit (11) is inserted downwardly into the inner bottom of the first water conduit (9), the other end of the second water conduit (11) is located outside the collecting bottle (10) and extends downwardly, and the height of the other end of the second water conduit (11) is lower than the height of one end of the second water conduit (11); and A power generation component having one end connected to the other end of the second water conduit (11), and the other end of the power generation component connected to the condenser (8).

4. The environmentally friendly and energy-saving steam turbine system for a thermal power plant according to claim 3 is characterized in that: The top of the collecting bottle (10) is provided with a venting pipe (12).

5. The environmentally friendly and energy-saving steam turbine system for a thermal power plant according to claim 3 is characterized in that: The power generation assembly comprises: a casing (13) fixedly mounted on the outer side wall of the steam turbine, the casing (13) being arranged in a vertical direction, one end of the casing (13) being connected to the other end of the second water conduit (11), the other end of the casing (13) being connected to one end of a drainage pipe, the other end of the drainage pipe being connected to the condenser (8); a spiral blade (14) installed in the housing (13), wherein the spiral blade (14) is capable of self-rotation under the impact of water flow; and A second generator (15) is fixedly mounted on the outer wall of the steam turbine, and the second generator (15) is transmission-connected to the spiral blade (14) via a transmission belt (16).

6. The environmentally friendly and energy-saving steam turbine system for a thermal power plant according to claim 5, characterized in that: The rotation axis of the spiral blade (14) is parallel to the axis of the housing (13).

7. The environmentally friendly and energy-saving steam turbine system for a thermal power plant according to claim 6, characterized in that: A support frame (17) is arranged inside the shell (13), the spiral blade (14) is rotatably connected to the support frame (17), and the transmission belt (16) is arranged to penetrate the shell (13).

8. The environmentally friendly and energy-saving steam turbine system for a thermal power plant according to claim 5, characterized in that: The first water conduit (9) is in the shape of a "crank handle" and comprises an integrally formed first vertical pipe, a horizontal pipe and a second vertical pipe; the upper end of the first vertical pipe is connected to the water outlet end of the water collecting funnel (4), and the lower end of the second vertical pipe is connected to the condenser (8).

9. The environmentally friendly and energy-saving steam turbine system for a thermal power plant according to claim 5, characterized in that: The second water conduit (11) is in an "η" shape, and a shorter vertical section of the second water conduit (11) is inserted into the collecting bottle (10).

10. The environmentally friendly and energy-saving steam turbine system for a thermal power plant according to any one of claims 1 to 9, characterized in that: The inner wall of the air intake pipe (2) is smooth and clean, and the outer wall of the air intake pipe (2) is provided with a heat-insulating layer (3).

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