Peak shaving system of thermal power plant

Abstract

The utility model relates to the technical field of heat supply peak shaving systems, in particular to a thermal power plant peak shaving system which comprises a steam turbine generator, the steam turbine generator comprises a steam inlet disc cylinder, a connecting frame is arranged on the rear side of the steam inlet disc cylinder, the front end of the connecting frame is fixedly connected with the rear end of the steam inlet disc cylinder through bolts, and a power generation device is arranged at the rear end of the connecting frame. The front end of the power generation device is fixedly connected with the rear end of the connecting frame, a rear end cover is arranged on the rear side of the power generation device, the peripheral end of the rear end cover is fixedly connected with the rear end of the power generation device through bolts, a copper pipe connector is arranged on the front side of the power generation device, and the rear end of the copper pipe connector is fixedly connected with the right side of the front end of the power generation device. The steam turbine generator is arranged to provide electric power for the heat pump, the steam outlet pipe is arranged on the front side of the steam inlet disc cylinder to recycle and send hot steam back to the heat pump to conduct auxiliary heating on the heat pump, and the hot steam enters the heat supply network circulating water supply pipeline along with the heat supply network circulating water pipeline to be used repeatedly.

Description

Technical Field

[0001] The utility model relates to the technical field of heat supply peak regulation systems, in particular to a thermal power plant peak regulation system. Background Art

[0002] Since electrical energy cannot be stored, and its generation and consumption are synchronized, it is imperative to maintain a balance between supply and demand. The load in the power system fluctuates frequently. To maintain active power balance and system frequency stability, thermal power plants must implement peak load regulation.

[0003] Existing peak-shaving technology for thermal power plants primarily utilizes electric boilers to absorb the electricity generated by steam turbine generators during peak-shaving periods, thereby achieving peak-shaving during periods of low load. Electric boiler peak-shaving focuses solely on peak-shaving needs and directly reduces the on-grid load, without considering the full utilization of energy. During the power generation process, a significant amount of heat is lost through the exhaust of steam turbine generators, and electric boiler peak-shaving does not recycle this heat, resulting in a relatively low overall energy utilization rate. Utility Model Content

[0004] The utility model provides a peak regulation system for a thermal power plant.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A thermal power plant peak shaving system includes a heat pump, a bypass valve, a heat network circulating water pump, a heat network heater, a steam turbine generator, a heat network circulating water return pipe, a bypass pipe, a heat network circulating water supply pipe, a generator steam extraction pipe, a low-temperature heat source pipe, a driving heat source line, and a heat network circulating water pipe. The steam turbine generator includes a steam inlet drum, a connecting frame is provided at the rear side of the steam inlet drum, the front end of the connecting frame is fixedly connected to the rear end of the steam inlet drum by bolts, a power generation device is provided at the rear end of the connecting frame, the front end of the power generation device is fixedly connected to the rear end of the connecting frame, a rear end cover is provided at the rear side of the power generation device, the peripheral end of the rear end cover is fixedly connected to the rear end of the power generation device by bolts, a copper pipe interface is provided at the front side of the power generation device, the rear end of the copper pipe interface is fixedly connected to the front end of the power generation device on the right side, a hollow cylindrical protrusion is provided at the front end of the steam inlet drum, the rear end of the cylindrical protrusion is fixed to and communicated with the front end of the steam inlet drum, a front end cover is provided at the front end of the cylindrical protrusion, and the front end cover is fixedly connected to the front end of the cylindrical protrusion by bolts. The lower end of the steam inlet drum is provided with a steam inlet threaded pipe, the upper end of the steam inlet threaded pipe is fixed and connected to the lower end of the steam inlet drum, and the steam inlet threaded pipe is inclined at forty-five degrees to the horizontal plane, and a steam outlet pipe is provided on the front side of the steam inlet drum, and the rear end of the steam outlet pipe is fixed and communicated with the front end of the steam inlet drum, and the steam outlet pipe is inclined at forty-five degrees to the front end face of the steam inlet drum. A rotating shaft is provided at the center of the steam inlet drum, and the front end of the rotating shaft is rotatably connected to the cylindrical protrusion through a bearing, and the rear end of the rotating shaft is rotatably connected to the rear end cover through a bearing. A steam impeller is provided on the rotating shaft, and the center of the steam impeller is connected to the rotating shaft through a key. The steam impeller is located in the steam inlet drum, and a copper rotor is provided at the rear end of the rotating shaft, and the copper rotor is fixedly connected to the cylindrical side surface of the rotating shaft. A stator coil is provided inside the generator, and the rear end of the stator coil is fixedly connected to the rear end of the generator. A pair of brushes are symmetrically provided on the inner side of the stator coil, and the outer ends of the pair of brushes are fixedly connected to the inner side of the stator coil. The pair of brushes are connected to the copper tube interface through a line.

[0007] Furthermore, the left side of the lower end of the heat pump is fixed and connected to the heat network circulating water return pipe, the heat network circulating water return pipe is fixed and connected to the bypass pipe, and the right side of the lower end of the heat pump is fixed and connected to the bypass pipe through the heat network circulating water pipe.

[0008] Furthermore, a bypass valve is installed in the bypass pipe, a heat network circulating water pump is installed behind the bypass valve, and the bypass pipe is fixed to and connected with the heat network heater.

[0009] Furthermore, the upper side of the heating network circulating water pump is fixed and connected to the steam inlet threaded pipe in the steam turbine generator through the generator steam extraction pipe, and the right side of the heating network circulating water pump is fixed and connected to the heating network circulating water supply pipe.

[0010] Furthermore, the left side of the upper end of the heat pump is connected to the copper pipe interface in the steam turbine generator through the driving heat source circuit, and the right side of the upper end is fixed and connected to the steam outlet pipe in the steam turbine generator through the low-temperature heat source pipeline.

[0011] Beneficial effect: By setting up a steam turbine generator, part of the hot steam in the heat network heater is introduced into the steam inlet drum through the steam inlet threaded pipe through the generator steam extraction pipe, driving the steam impeller in the steam inlet drum to rotate, thereby driving the rotor at the rear end to rotate to achieve the purpose of power generation and provide electricity for the heat pump, and a steam outlet pipe is set on the front side of the steam inlet drum, which can recover the hot steam that drives the steam impeller to rotate, and return it to the heat pump through the low-temperature heat source pipe for auxiliary heating of the heat pump, and enters the heat network circulating water supply pipe along the heat network circulating water pipe for multiple use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the three-dimensional structure of the steam turbine generator of the present invention. Figure 1 ;

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the steam turbine generator of the present invention. Figure 2 ;

[0015] Figure 4 This is a schematic diagram of the main structure of the steam turbine generator of the present invention;

[0016] Figure 5 This is a schematic diagram of the three-dimensional structure of the internal structure of the steam turbine generator of the present invention;

[0017] Reference numerals:

[0018] 1 heat pump, 2 bypass valve, 3 heating network circulating water pump, 4 heating network heater, 5 steam turbine generator, 6 heating network circulating water return pipe, 7 bypass pipe, 8 heating network circulating water supply pipe, 9 generator steam extraction pipe, 10 low-temperature heat source pipe, 11 driving heat source line, 12 heating network circulating water pipe;

[0019] 501 steam inlet drum, 502 steam inlet threaded pipe, 503 steam outlet pipe, 504 connecting frame, 505 generator, 506 front end cover, 507 copper pipe interface, 508 rear end cover, 509 rotating shaft, 510 steam impeller, 511 stator coil, 512 copper rotor, 513 brush. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are 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, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0022] Reference Figure 1-5A thermal power plant peak regulation system includes a heat pump 1, a bypass valve 2, a heat network circulating water pump 3, a heat network heater 4, a steam turbine generator 5, a heat network circulating water return pipe 6, a bypass pipe 7, a heat network circulating water supply pipe 8, a generator steam extraction pipe 9, a low-temperature heat source pipe 10, a driving heat source line 11, and a heat network circulating water pipe 12. The steam turbine generator 5 includes a steam inlet drum 501, a connecting frame 504 is provided at the rear side of the steam inlet drum 501, the front end of the connecting frame 504 is fixedly connected to the rear end of the steam inlet drum 501 by bolts, and the rear end of the connecting frame 504 is provided with a power generation device 505, and the front end of the power generation device 505 is connected to the connecting frame 504. The rear end of the frame 504 is fixedly connected, the rear side of the power generation device 505 is provided with a rear end cover 508, the periphery of the rear end cover 508 is fixedly connected to the rear end of the power generation device 505 by bolts, the front side of the power generation device 505 is provided with a copper pipe interface 507, the rear end of the copper pipe interface 507 is fixedly connected to the front end of the power generation device 505 on the right side, the front end of the steam inlet disc 501 is provided with a hollow cylindrical protrusion, the rear end of the cylindrical protrusion is fixed and communicated with the front end of the steam inlet disc 501, the front end of the cylindrical protrusion is provided with a front end cover 506, the front end cover 506 is fixedly connected to the front end of the cylindrical protrusion by bolts, and the lower end of the steam inlet disc 501 is provided with a steam inlet The threaded pipe 502 has an upper end fixed and connected to the lower end of the steam inlet drum 501, and the steam inlet threaded pipe 502 is tilted at 45 degrees to the horizontal plane. The front side of the steam inlet drum 501 is provided with a steam outlet pipe 503, and the rear end of the steam outlet pipe 503 is fixed and connected to the front end of the steam inlet drum 501. The steam outlet pipe 503 is tilted at 45 degrees to the front end of the steam drum. The center of the steam inlet drum 501 is provided with a rotating shaft 509, and the front end of the rotating shaft 509 is rotatably connected to the cylindrical protrusion through a bearing, and the rear end of the rotating shaft 509 is rotatably connected to the rear end cover 508 through a bearing. The rotating shaft 509 is provided with a steam impeller 510 The center of the steam impeller 510 is connected to the rotating shaft 509 through a key. The steam impeller 510 is located in the steam inlet drum 501. A copper rotor 512 is provided at the rear end of the rotating shaft 509. The copper rotor 512 is fixedly connected to the cylindrical side of the rotating shaft 509. A stator coil 511 is provided inside the generator 505. The rear end of the stator coil 511 is fixedly connected to the rear end of the generator 505. A pair of brushes 513 are symmetrically provided on the left and right sides of the stator coil 511. The outer ends of the pair of brushes 513 are fixedly connected to the inner side of the stator coil 511. The pair of brushes 513 are connected to the copper pipe interface 507 through a line.

[0023] The left side of the lower end of the heat pump 1 is fixed and connected to the heat network circulating water return pipe 6, the heat network circulating water return pipe 6 is fixed and connected to the bypass pipe 7, and the right side of the lower end of the heat pump 1 is fixed and connected to the bypass pipe 7 through the heat network circulating water pipe 12.

[0024] A bypass valve 2 is installed in the bypass pipe 7 , a heat network circulating water pump 3 is installed behind the bypass valve 2 , and the bypass pipe 7 is fixed to and communicated with the heat network heater 4 .

[0025] The upper side of the heating network circulating water pump 3 is fixed and connected to the steam inlet threaded pipe 502 in the steam turbine generator 5 through the generator steam extraction pipe 9, and the right side of the heating network circulating water pump 3 is fixed and connected to the heating network circulating water supply pipe 8.

[0026] The left side of the upper end of the heat pump 1 is connected to the copper pipe interface 507 in the steam turbine generator 5 through the driving heat source line 11, and the right side of the upper end is fixed and connected to the steam outlet pipe 503 in the steam turbine generator 5 through the low-temperature heat source pipeline 10.

[0027] Working principle:

[0028] By setting up a steam turbine generator 5, part of the hot steam in the heat network heater 4 is led into the steam inlet drum 501 through the steam inlet threaded pipe 502 via the generator steam extraction pipe 9, driving the steam impeller 510 in the steam inlet drum 501 to rotate, thereby driving the rotor at the rear end to rotate to achieve the purpose of power generation, providing electricity for the heat pump 1, and a steam outlet pipe 503 is set on the front side of the steam inlet drum 501. The steam outlet pipe 503 can recover the hot steam that drives the steam impeller 510 to rotate, and return it to the heat pump 1 through the low-temperature heat source pipe 10 to be used for auxiliary heating of the heat pump 1, and enters the heat network circulating water supply pipe 8 along the heat network circulating water pipe 12 for multiple use.

[0029] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A thermal power plant peak regulation system, characterized by: The invention comprises a heat pump (1), a bypass valve (2), a heat network circulating water pump (3), a heat network heater (4), a steam turbine generator (5), a heat network circulating water return pipe (6), a bypass pipe (7), a heat network circulating water supply pipe (8), a generator extraction pipe (9), a low-temperature heat source pipe (10), a driving heat source circuit (11), and a heat network circulating water pipe (12). The steam turbine generator (5) comprises a steam inlet drum (501), a connecting frame (504) is provided at the rear side of the steam inlet drum (501), a front end of the connecting frame (504) is fixedly connected to the rear end of the steam inlet drum (501) by bolts, a power generation device (505) is provided at the rear end of the connecting frame (504), and a front end of the power generation device (505) is connected to the connecting frame (504). The rear end of the frame (504) is fixedly connected, the rear side of the power generation device (505) is provided with a rear end cover (508), the peripheral end of the rear end cover (508) is fixedly connected to the rear end of the power generation device (505) by bolts, the front side of the power generation device (505) is provided with a copper pipe interface (507), the rear end of the copper pipe interface (507) is fixedly connected to the right side of the front end of the power generation device (505), the front end of the steam inlet drum (501) is provided with a hollow cylindrical protrusion, the rear end of the cylindrical protrusion is fixed and communicated with the front end of the steam inlet drum (501), the front end of the cylindrical protrusion is provided with a front end cover (506), the front end cover (506) is fixedly connected to the front end of the cylindrical protrusion by bolts, the lower end of the steam inlet drum (501) is provided with a steam inlet threaded pipe ( 502), the upper end of the steam inlet threaded pipe (502) is fixed and connected to the lower end of the steam inlet drum (501), the steam inlet threaded pipe (502) is inclined at 45 degrees to the horizontal plane, the front side of the steam inlet drum (501) is provided with a steam outlet pipe (503), the rear end of the steam outlet pipe (503) is fixed and connected to the front end of the steam inlet drum (501), the steam outlet pipe (503) is inclined at 45 degrees to the front end of the steam inlet drum (501), a rotating shaft (509) is provided at the center of the steam inlet drum (501), the front end of the rotating shaft (509) is rotatably connected to the cylindrical protrusion through a bearing, the rear end of the rotating shaft (509) is rotatably connected to the rear end cover (508) through a bearing, a steam impeller (510) is provided on the rotating shaft (509), the steam The center of the steam impeller (510) is connected to the rotating shaft (509) through a key. The steam impeller (510) is located in the steam inlet drum (501). The rear end of the rotating shaft (509) is provided with a copper rotor (512). The copper rotor (512) is fixedly connected to the cylindrical side of the rotating shaft (509). The generator (505) is provided with a stator coil (511). The rear end of the stator coil (511) is fixedly connected to the rear end of the generator (505). A pair of brushes (513) are symmetrically provided on the inside of the stator coil (511). The outer ends of the pair of brushes (513) are fixedly connected to the inner side of the stator coil (511). The pair of brushes (513) are connected to the copper pipe interface (507) through a line.

2. A thermal power plant peak shaving system according to claim 1, characterized in that: The left side of the lower end of the heat pump (1) is fixed to and communicated with the heat network circulating water return pipe (6), the heat network circulating water return pipe (6) is fixed to and communicated with the bypass pipe (7), and the right side of the lower end of the heat pump (1) is fixed to and communicated with the bypass pipe (7) via the heat network circulating water pipe (12).

3. A thermal power plant peak shaving system according to claim 1, characterized in that: A bypass valve (2) is installed in the bypass pipe (7), a heating network circulating water pump (3) is installed behind the bypass valve (2), and the bypass pipe (7) is fixed to and communicated with the heating network heater (4).

4. A thermal power plant peak shaving system according to claim 1, characterized in that: The upper side of the heating network circulating water pump (3) is fixed and connected to the steam inlet threaded pipe (502) in the steam turbine generator (5) through the generator steam extraction pipe (9), and the right side of the heating network circulating water pump (3) is fixed and connected to the heating network circulating water supply pipe (8).

5. The peak-shaving system of a thermal power plant according to claim 1, characterized in that: The left side of the upper end of the heat pump (1) is connected to the copper pipe interface (507) in the steam turbine generator (5) through the driving heat source circuit (11), and the right side of the upper end is fixed and connected to the steam outlet pipe (503) in the steam turbine generator (5) through the low-temperature heat source pipeline (10).

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