Peak shaving device of thermal power generating unit

Abstract

The invention provides a thermal power generating unit peak regulation device which comprises a power generation assembly, a peak regulation assembly and a peak regulation assembly. The refrigeration assembly is provided with a steam inlet, a water source inlet and a cooling capacity outlet, and the steam inlet communicates with the steam outlet so that steam of the power generation assembly can drive the refrigeration assembly to work; the storage part is provided with a cooling capacity cavity which can communicate with the cooling capacity outlet and store the cooling capacity; and a heat exchange pipe of the heat exchanger penetrates through the cooling capacity cavity. Through the technical scheme provided by the invention, the problem of poor peak regulation and frequency modulation response capability of the power plant in the related technology can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and in particular to a peak-shaving device for a thermal power unit. Background Art

[0002] Thermal power generation refers to a power generation method that uses the heat energy generated by coal combustion to heat the water in the boiler and generate high-temperature and high-pressure steam. The steam enters the steam turbine unit and drives the rotor of the steam turbine unit to rotate, thereby driving the generator to generate electricity.

[0003] With the rapid development of social economy, the peak-valley difference of power load is expanding due to the uneven power consumption of end users. For example, the power consumption during the day is significantly greater than that at night, which makes it extremely difficult to adjust the peak of the power grid. In particular, the operation of thermal power units adopts the operation mode of determining power by heat, which not only has a narrow peak adjustment range, but also aggravates the excess power generation during the low power load period of the power grid.

[0004] Therefore, during the peak-shaving stage of the steam turbine unit, improving the peak-shaving and frequency-regulating response capabilities of the power plant has become an issue that needs to be addressed urgently. Summary of the invention

[0005] The present invention provides a peak-shaving device for a thermal power unit to solve the problem of poor peak-shaving and frequency-regulating response capability of a power plant in the related art.

[0006] The present invention provides a peak-shaving device for a thermal power unit, which comprises: a power generation component having a steam outlet; a refrigeration component having a steam inlet, a water source inlet and a cold capacity outlet, wherein the steam inlet and the steam outlet are connected so that the steam of the power generation component drives the refrigeration component to work; a storage component having a cold capacity cavity which can be connected to the cold capacity outlet and store cold capacity; and a heat exchanger, wherein the heat exchange pipe of the heat exchanger is passed through the cold capacity cavity.

[0007] By applying the technical solution of the present invention, the peak-shaving device of a thermal power unit includes a power generation component, a refrigeration component, a storage component and a heat exchanger. The steam in the power generation component is transported to the refrigeration component through a steam outlet and a steam inlet. The refrigeration component is driven to work by the steam of the power generation component. The water source is transported to the refrigeration component through a water source inlet of the refrigeration component. The refrigeration component is used to make ice and ice slurry from water. The prepared ice and ice slurry are transported to a cold volume cavity storing cold volume through a cold volume outlet, and heat is exchanged with a heat exchange pipe penetrating the cold volume cavity, thereby providing cold volume to the user end. By extracting the steam in the power generation component to drive the refrigeration component to work, the output of the thermal power unit can be reduced, so that the thermal power unit can also have good peak-shaving and frequency-regulating response capabilities during the peak-shaving stage.

[0008] Furthermore, the refrigeration assembly includes a driving machine and a refrigerator, the steam inlet is arranged at the driving machine, the refrigerator is located downstream of the driving machine, the driving machine has a cold source outlet, the refrigerator has a cold source inlet, the cold source outlet is connected to the cold source inlet, and the cold capacity outlet is arranged at the refrigerator. With the above refrigeration assembly, the driving machine can be used to drive the refrigerator to work, and the refrigerator can be used to make ice and ice slurry.

[0009] Furthermore, the refrigerator includes an ice maker and a cold storage tank, the cold storage tank is located downstream of the ice maker and communicated with the ice maker, a steam inlet and a water source inlet are provided in the ice maker, and a cold capacity outlet includes an ice cube outlet provided in the ice maker and an ice slurry outlet provided in the cold storage tank. With the above refrigerator, ice and ice slurry can be prepared by the ice maker, and the ice slurry can be stored by the cold storage tank, so that ice and ice slurry can be stored separately.

[0010] Furthermore, the power generation component includes a steam turbine and a generator connected to the steam turbine, the generator is electrically connected to the driving machine, and the steam outlet is arranged at the steam turbine. With the above-mentioned power generation component, steam can be used to drive the steam turbine to rotate, and the steam turbine drives the generator to rotate and generate electricity. The electric energy generated by the generator can drive the driving machine to work, and then drive the ice maker to work. By directly using the electric energy generated by the power generation component to drive the driving machine to work, the amount of electricity connected to the grid is reduced, so that the thermal power unit can also have good peak-shaving and frequency-regulating response capabilities during the peak-shaving stage.

[0011] Furthermore, the peak load regulation device of the thermal power unit also includes a driving branch and a power grid branch, the generator is electrically connected to the driving machine through the driving branch, the generator is connected to the power grid through the power grid branch, and a switch is arranged on the driving branch. With the above structure, electric energy can be transmitted to the power grid through the power grid branch, electric energy can be supplied to the driving machine through the driving branch, and the driving branch can be controlled by the switch to freely switch the driving mode of the driving machine.

[0012] Furthermore, the peak load regulation device of the thermal power unit also includes a steam pipeline, the steam outlet is connected to the steam inlet through the steam pipeline, and a valve is arranged on the steam pipeline. The valve can be used to control the steam pipeline to control the on and off of the steam pipeline and switch the driving mode of the driving machine.

[0013] Furthermore, the refrigerator has a water inlet pipeline, the two ends of which are respectively connected to the water source inlet and the chemical water of the power plant, and a first water pump is arranged on the water inlet pipeline. The battery chemical water can be transported to the ice maker through the first water pump by the water inlet pipe to provide a water source for the ice maker, and ice is made by the ice maker.

[0014] Furthermore, a first thermometer is provided on the cold storage tank, and the temperature of the cold storage tank can be measured by the first thermometer, so as to adjust the temperature of the cold storage tank.

[0015] Furthermore, the storage unit includes a transfer vehicle and an ice bucket, the cold volume chamber includes a transport chamber provided in the transfer vehicle and a storage chamber provided in the ice bucket, the transport chamber can be communicated with the cold volume outlet, and the heat exchange pipe is passed through the storage chamber. The transfer vehicle can be used to transport ice in the ice maker and ice slurry in the cold storage tank to the ice bucket, where they are stored and heat exchanged with the heat exchanger.

[0016] Furthermore, a second thermometer is provided on the ice bucket, and the temperature of the ice bucket can be measured by the second thermometer to adjust the temperature of the ice bucket. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of a peak-shaving device for a thermal power plant provided according to an embodiment of the present invention is shown.

[0019] The above drawings include the following reference numerals:

[0020] 1. Steam turbine; 2. Generator; 3. Power grid; 4. Driving machine; 5. Ice maker; 6. Cold storage tank; 7. Transfer vehicle; 8. Ice bucket; 9. User end; 10. Cooling pipe; 11. First water pump; 12. Valve; 13. Switch; 14. Steam pipeline; 15. Driving branch; 16. Water inlet pipe; 17. First thermometer; 18. Heat exchanger; 19. Heat exchange tube. DETAILED DESCRIPTION

[0021] 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, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0022] like Figure 1 As shown, an embodiment of the present invention provides a peak-shaving device for a thermal power unit, which includes a power generation component, a refrigeration component, a storage component, and a heat exchanger 18. The power generation component has a steam outlet; the refrigeration component has a steam inlet, a water source inlet, and a cold outlet, and the steam inlet and the steam outlet are connected so that the steam of the power generation component drives the refrigeration component to work; the storage component has a cold cavity that can be connected to the cold outlet and store cold; the heat exchange tube 19 of the heat exchanger 18 is inserted into the cold cavity.

[0023] By applying the technical solution of the present invention, the peak-shaving device of a thermal power unit includes a power generation component, a refrigeration component, a storage component and a heat exchanger. The steam in the power generation component is transported to the refrigeration component through a steam outlet and a steam inlet. The refrigeration component is driven to work by the steam of the power generation component. The water source is transported to the refrigeration component through a water source inlet of the refrigeration component. The refrigeration component is used to make ice and ice slurry from water. The prepared ice and ice slurry are transported to a cold volume cavity storing cold volume through a cold volume outlet, and heat is exchanged with a heat exchange pipe 19 penetrating the cold volume cavity, thereby providing cold volume to a user end 9. By extracting the steam in the power generation component to drive the refrigeration component to work, the output of the thermal power unit can be reduced, so that the thermal power unit can also have good peak-shaving and frequency-regulating response capabilities during the peak-shaving stage.

[0024] In this embodiment, the user end 9 is provided with a cooling pipe 10, and the heat exchange pipe 19 of the heat exchanger 18 is connected to the cooling pipe 10. The cooling pipe 10 can cool the air to transfer the cold energy to the air, thereby achieving cooling of the user end.

[0025] like Figure 1 As shown, the refrigeration assembly includes a driving machine 4 and a refrigerator, a steam inlet is arranged at the driving machine 4, the refrigerator is located downstream of the driving machine 4, the driving machine 4 has a cold source outlet, the refrigerator has a cold source inlet, the cold source outlet is connected to the cold source inlet, and the cold capacity outlet is arranged at the refrigerator. By adopting the above refrigeration assembly, the driving machine 4 can be used to drive the refrigerator to work, and the refrigerator can be used to make ice and ice slurry.

[0026] The driving machine 4 can be driven by steam or other energy sources, such as electrical energy.

[0027] like Figure 1 As shown, the refrigerator includes an ice maker 5 and a cold storage tank 6, the cold storage tank 6 is located downstream of the ice maker 5 and communicated with the ice maker 5, a steam inlet and a water source inlet are provided at the ice maker 5, and a cold capacity outlet includes an ice cube outlet provided at the ice maker 5 and an ice slurry outlet provided at the cold storage tank 6. With the above refrigerator, ice and ice slurry can be prepared by the ice maker 5, and ice slurry can be stored by the cold storage tank 6, so that ice and ice slurry can be stored separately.

[0028] In this embodiment, an ice slurry pipe is provided between the ice maker 5 and the cold storage tank 6, and a delivery pump is provided on the ice slurry pipe to deliver the ice slurry made by the ice maker 5 to the cold storage tank 6 through the ice slurry pipe.

[0029] like Figure 1As shown, the power generation assembly includes a steam turbine 1 and a generator 2 drivingly connected to the steam turbine 1, the generator 2 is electrically connected to the driving machine 4, and the steam outlet is arranged at the steam turbine 1. With the above-mentioned power generation assembly, steam can be used to drive the steam turbine 1 to rotate, and the steam turbine 1 drives the generator 2 to rotate and generate electricity. The electric energy generated by the generator 2 can drive the driving machine 4 to work, and then drive the ice maker 5 to work. By directly using the electric energy generated by the power generation assembly to drive the driving machine to work, the amount of electricity connected to the grid is reduced, so that the thermal power unit can also have good peak-shaving and frequency-regulating response capabilities during the peak-shaving stage.

[0030] Of course, the electric energy generated by the generator 2 can also be directly used to drive the ice maker 5 to work.

[0031] like Figure 1 As shown, the peak-shaving device of the thermal power unit further includes a driving branch 15 and a grid branch, the generator 2 is electrically connected to the driving machine 4 through the driving branch 15, the generator 2 is connected to the grid 3 through the grid branch, and a switch 13 is provided on the driving branch 15. With the above structure, electric energy can be transmitted to the grid through the grid branch, electric energy can be supplied to the driving machine 4 through the driving branch 15, and the driving branch 15 can be controlled by the switch 13 to freely switch the driving mode of the driving machine 4.

[0032] like Figure 1 As shown, the peak-shaving device of the thermal power unit also includes a steam pipeline 14, through which the steam outlet is connected to the steam inlet, and a valve 12 is provided on the steam pipeline 14. The valve 12 can be used to control the steam pipeline 14 to control the on and off of the steam pipeline 14 and switch the driving mode of the driving machine 4.

[0033] like Figure 1 As shown, the refrigerator has a water inlet pipe 16, both ends of which are connected to the water source inlet and the chemical water of the power plant respectively, and a first water pump 11 is arranged on the water inlet pipe 16. The battery chemical water can be transported to the ice maker 5 through the first water pump 11 by the water inlet pipe 16, so as to provide a water source for the ice maker 5, and the ice maker 5 is used to make ice.

[0034] like Figure 1 As shown, a first thermometer 17 is provided on the cold storage tank 6. The first thermometer 17 can be used to measure the temperature of the cold storage tank 6, and then the temperature of the cold storage tank 6 can be adjusted.

[0035] like Figure 1 As shown, the storage unit includes a transfer vehicle 7 and an ice bucket 8, the cold volume chamber includes a transport chamber provided in the transfer vehicle 7 and a storage chamber provided in the ice bucket 8, the transport chamber can be communicated with the cold volume outlet, and the heat exchange pipe 19 is passed through the storage chamber. The transfer vehicle 7 can be used to transport ice in the ice maker 5 and ice slurry in the cold storage tank 6 to the ice bucket 8, where they are stored and heat exchanged with the heat exchanger 18.

[0036] like Figure 1 As shown, a second thermometer is provided on the ice bucket 8. The second thermometer can be used to measure the temperature of the ice bucket 8 to adjust the temperature of the ice bucket 8.

[0037] The application of the peak-shaving device for thermal power generation units provided by the present invention has the following beneficial effects:

[0038] (1) During the peak-shaving period of the power grid, the entire ice-making equipment can be driven by the peak-shaving electricity to consume electricity, reduce the on-grid power of the power plant, make full use of the electricity during the peak-shaving period of the thermal power plant, avoid waste of resources, and achieve green production, which is a reliable peak-shaving method.

[0039] (2) During the peak load period of the power grid, the thermal power plant can extract steam to drive the entire ice-making equipment, which can reduce the amount of steam entering the turbine for work, thereby reducing the generator output, which is an effective peak load means.

[0040] (3) The ice and ice slurry produced by the above technology can meet the building cooling needs by exchanging heat on the user side, thereby improving energy utilization efficiency and meeting environmental protection requirements.

[0041] (4) Refrigeration and cold storage are carried out within the thermal power plant, and cold chain vehicles are used for mobile cooling, which greatly saves site utilization area and costs.

[0042] (5) It can effectively assist thermal power plants in implementing the “three reforms” and stimulate new vitality for the green and low-carbon development of coal-fired power.

[0043] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0045] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the 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 devices or elements 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 contours of each component itself.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0047] 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. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A peak-shaving device for a thermal power unit, characterized in that: The peak load regulation device of the thermal power unit comprises: a power generation assembly having a steam outlet; A refrigeration component, having a steam inlet, a water source inlet and a cold outlet, wherein the steam inlet and the steam outlet are connected to each other so that the steam of the power generation component drives the refrigeration component to work; A storage member having a cold energy cavity capable of communicating with the cold energy outlet and storing cold energy; A heat exchanger (18), wherein a heat exchange tube (19) of the heat exchanger (18) is inserted into the cold volume cavity.

2. The peak load regulation device of a thermal power unit according to claim 1, characterized in that: The refrigeration component comprises a driving machine (4) and a refrigerator, the steam inlet is arranged on the driving machine (4), the refrigerator is located downstream of the driving machine (4), the driving machine (4) has a cold source outlet, the refrigerator has a cold source inlet, the cold source outlet is connected to the cold source inlet, and the cold capacity outlet is arranged on the refrigerator.

3. The peak load regulation device of a thermal power unit according to claim 2, characterized in that: The refrigerator comprises an ice maker (5) and a cold storage tank (6); the cold storage tank (6) is located downstream of the ice maker (5) and is in communication with the ice maker (5); the steam inlet and the water source inlet are arranged on the ice maker (5); and the cold capacity outlet comprises an ice cube outlet arranged on the ice maker (5) and an ice slurry outlet arranged on the cold storage tank (6).

4. The peak load regulation device of a thermal power unit according to claim 2, characterized in that: The power generation component comprises a steam turbine (1) and a generator (2) drivingly connected to the steam turbine (1), the generator (2) being electrically connected to the driving machine (4), and the steam outlet being arranged at the steam turbine (1).

5. The peak load regulation device for thermal power generation unit according to claim 4, characterized in that: The peak load regulation device of the thermal power unit further comprises a drive branch (15) and a power grid branch, the generator (2) is electrically connected to the drive machine (4) via the drive branch (15), the generator (2) is connected to the power grid (3) via the power grid branch, and a switch (13) is provided on the drive branch (15).

6. The peak load regulation device of a thermal power unit according to claim 2, characterized in that: The peak load regulation device of the thermal power unit further comprises a steam pipeline (14), the steam outlet is connected to the steam inlet through the steam pipeline (14), and a valve (12) is arranged on the steam pipeline (14).

7. The peak load regulation device of a thermal power unit according to claim 2, characterized in that: The refrigerator has a water inlet pipe (16), both ends of which are respectively connected to the water source inlet and the chemical water of the power plant, and a first water pump (11) is arranged on the water inlet pipe (16).

8. The peak load regulation device of a thermal power unit according to claim 3, characterized in that: The cold storage tank (6) is provided with a first temperature measuring instrument (17).

9. The peak load regulation device of a thermal power unit according to claim 1, characterized in that: The storage unit comprises a transfer vehicle (7) and an ice bucket (8); the cold volume chamber comprises a transport chamber arranged on the transfer vehicle (7) and a storage chamber arranged on the ice bucket (8); the transport chamber can be connected to the cold volume outlet; and the heat exchange pipe (19) is passed through the storage chamber.

10. The peak load regulation device of a thermal power unit according to claim 9, characterized in that: The ice bucket (8) is provided with a second temperature measuring instrument.

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