High, medium, and low-pressure steam integrated supply system based on green power energy storage

Abstract

The present invention discloses a high, medium and low pressure steam integrated supply system based on green power energy storage, which comprises: a heat pump energy storage system, a green power energy storage system, a low-temperature flash evaporation system, a high-temperature flash evaporation system and a gas supply system. The heat pump energy storage system comprises: a heat pump heat generation device and a heat pump heat storage device. The heat pump heat generation device is used to heat the heat storage medium in the heat pump heat storage device to achieve primary heat storage. The green power energy storage system comprises: an energy supply device, a power storage device and a green power heat storage device. The low-temperature flash evaporation system comprises: a low-temperature flash evaporation tank and a low-temperature flash evaporation pipeline. The high-temperature flash evaporation system comprises: a high-temperature flash evaporation tank and a high-temperature flash evaporation pipeline. The high, medium and low pressure steam integrated supply system based on green power energy storage according to the present invention has advantages such as wide application range, low operation cost and low system energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump energy conservation, and particularly to a high, medium, and low pressure steam integrated supply system based on green power energy storage and a method thereof. Background Art

[0002] Steam boilers can provide high-temperature and high-pressure steam and are widely used in various technological processes in industry and daily life. Existing boilers are mainly fuel boilers such as coal-fired boilers and gas-fired boilers, or electric boilers. Fuel boilers directly utilize the combustion heat of fuel to generate steam, and their operating costs are often relatively low. However, during the combustion process, due to impurities in the fuel, pollutants such as nitrogen oxides and greenhouse gases such as carbon dioxide will be generated. Among them, since coal-fired boilers will generate a large amount of pollution during operation, in recent years, with the continuous increase of the country's environmental protection efforts, coal-fired boilers have been continuously phased out and renovated. Even cleaner gas-fired boilers will emit a large amount of carbon dioxide during the combustion process. Moreover, gas-fired boilers also face the problem of "gas shortage", that is, insufficient natural gas supply, especially in winter when the heating demand is strong.

[0003] In comparison, electric boilers have a wider range of adaptability. Electric boilers can directly convert electrical energy into heat energy for generating steam. Compared with fuel boilers, electric boilers not only have environmental protection but also have more flexible adjustment capabilities. However, the electric boilers in the prior art are highly dependent on heat source conditions and the environment; they operate unstably and have poor performance; the system usage methods are limited; they consume a large amount of electricity during operation, and the operating costs are high during peak power periods; the price of energy storage material is expensive. Therefore, there is room for improvement in the above technologies. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the present invention is to provide a high, medium, and low pressure steam integrated supply system based on green power energy storage, and the high, medium, and low pressure steam integrated supply system based on green power energy storage has advantages such as a wide application range, low operating cost, and low system energy consumption.

[0005] The high, medium, and low pressure steam integrated supply system based on green power energy storage according to an embodiment of the present invention includes:

[0006] A heat pump energy storage system, the heat pump energy storage system includes: a heat pump heat generation device and a heat pump heat storage device, and the heat pump heat generation device is used to heat the heat storage medium in the heat pump heat storage device to achieve primary heat storage;

[0007] Green power energy storage system, the green power energy storage system includes: an energy supply device, an electricity storage device, and a green power heat storage device. The electricity storage device is electrically connected to the energy supply device and the green power heat storage device respectively. The energy supply device stores the generated electric energy in the electricity storage device, and the electricity storage device is used to heat the heat storage medium in the green power heat storage device to achieve secondary heat storage;

[0008] Low-temperature flash evaporation system, the low-temperature flash evaporation system includes: a low-temperature flash evaporation tank and a low-temperature flash evaporation pipeline. The low-temperature flash evaporation tank is connected to the heat pump heat storage device through the low-temperature flash evaporation pipeline, and the low-temperature flash evaporation tank is used to perform low-temperature flash evaporation treatment on the heat storage medium in the heat pump heat storage device;

[0009] High-temperature flash evaporation system, the high-temperature flash evaporation system includes: a high-temperature flash evaporation tank and a high-temperature flash evaporation pipeline. The high-temperature flash evaporation tank is connected to the green power heat storage device through the high-temperature flash evaporation pipeline, and the high-temperature flash evaporation tank is used to perform high-temperature flash evaporation treatment on the heat storage medium in the green power heat storage device;

[0010] Gas supply system, the gas supply system includes: an ejector tank, an ejector pump, and an ejector pipeline. The ejector tank is connected to the low-temperature flash evaporation tank and the high-temperature flash evaporation tank respectively through the ejector pipeline; the working modes of the gas supply system include a low-temperature supply mode, a medium-temperature supply mode, and a high-temperature supply mode. In the low-temperature supply mode, the low-temperature flash evaporation system operates alone, and the heat storage medium after the low-temperature flash evaporation treatment is transported to the ejector tank to generate low-temperature steam at 100°C; in the high-temperature supply mode, the high-temperature flash evaporation system operates alone, and the heat storage medium after the high-temperature flash evaporation treatment is transported to the ejector tank to generate high-temperature steam at 200°C; in the medium-temperature supply mode, the low-temperature flash evaporation system and the high-temperature flash evaporation system operate together, and the heat storage medium after the low-temperature flash evaporation treatment and the heat storage medium after the high-temperature flash evaporation treatment are ejected to the ejector tank through the ejector pump to generate medium-temperature steam at 100 - 200°C.

[0011] The high, medium, and low-pressure steam integrated supply system based on green power energy storage according to the present invention has advantages such as a wide application range, low operating cost, and low system energy consumption.

[0012] In some embodiments, the green power energy storage system further includes: a first conveying device. After the heat storage medium completes the first-stage heat storage in the heat pump heat storage device, the heat storage medium is transported to the green power heat storage device through the first conveying device.

[0013] In some embodiments, the green power energy storage system further includes: a green power heater disposed in the green power heat storage device for heating the heat storage medium; the heat pump heat generation device further includes: a heat pump compressor, and the heat pump compressor and the green power heater are supplied with electric energy by the electricity storage device.

[0014] In some embodiments, the heat pump energy storage system further includes: a second conveying device, and the low-temperature flash tank is connected to the ejector tank through the second conveying device; in the medium-temperature supply mode, the heat storage medium that has undergone the first-stage heat storage in the low-temperature flash tank is introduced into the ejector tank through the second conveying device to adjust the medium-temperature steam.

[0015] In some embodiments, the heat pump energy storage system further includes: a third conveying device, the third conveying device is connected to the heat pump heat storage device, and the heat pump heat storage device replenishes the heat storage medium through the third conveying device.

[0016] In some embodiments, the low-temperature flash system further includes: a first return pipeline, and a low-temperature flash return water pump is provided in the first return pipeline. The low-temperature flash return water pump is used to return the heat storage medium flashed in the low-temperature flash tank to the heat pump heat storage device through the first return pipeline.

[0017] In some embodiments, the high-temperature flash system further includes: a second return pipeline, and a high-temperature flash return water pump is provided in the second return pipeline. The high-temperature flash return water pump is used to return the heat storage medium flashed in the high-temperature flash tank to the green power heat storage device through the second return pipeline.

[0018] In some embodiments, the gas supply system further includes: a third return pipeline, the third return pipeline is connected to the first return pipeline, and the heat storage medium in the ejector tank is returned to the heat pump heat storage device through the third return pipeline and the first return pipeline.

[0019] In some embodiments, the heat storage medium is a water working medium.

[0020] Compared with the prior art, the beneficial effects of the present application are as follows:

[0021] First, the heat pump energy storage system can store heat by using the principle of an air source heat pump. First, the hot water in the heat pump hot water tank 30 is heated to above 100°C to achieve the first-stage low-temperature heat storage, which can effectively utilize the performance advantages of the air source heat pump, reduce the consumption of electric energy, lower the operation cost and expenses. In addition, the air source is a ubiquitous heat source, effectively solving the dependence of the application production site on the heat source;

[0022] Second, by using direct electric heating with valley electricity for heat storage, during the low valley period of urban electricity consumption at night, heat energy is stored through electric heating. First, the hot water in the green electricity storage water tank 50 is heated to over 200 °C, effectively solving the dependence on heat sources in the application production site and enabling direct use in many application scenarios without heat sources;

[0023] Third, during the low valley period of urban electricity consumption at night, a large amount of high-temperature heat energy is stored through electric heating, and high-temperature and high-pressure steam is generated through flash evaporation, avoiding huge power consumption, reducing the operating cost, and improving the economy of steam generation;

[0024] Fourth, by using high-temperature and high-pressure hot water above 100 °C and 200 °C for heat storage, the water working medium is cheap, has a low usage cost, and has no corrosion to the water tank, effectively avoiding the high usage cost of molten salt heat storage; and by directly flashing high-temperature and high-pressure hot water above 100 °C and 200 °C to generate low-temperature and high-temperature steam, the heat exchange temperature and heat exchange system required for molten salt heat storage are effectively avoided, improving the heat exchange efficiency and reducing the equipment cost;

[0025] Fifth, through separate flash evaporation, the demand for high-temperature steam above 200 °C and low-temperature steam near 100 °C can be met. At the same time, by coupling the ejector method, the demand for medium-temperature steam between 100 - 200 °C can also be met, meeting the steam demand within the industrial heating range;

[0026] Sixth, the steam integrated supply system is coupled with a solar power generation panel 90 and a wind turbine 92. Not only can clean solar energy and wind energy be used for power generation to supply the operation of electrical equipment during the day, but also it can be stored in a storage battery 96 for use by a heat pump compressor and an electric heater at night, effectively using clean solar energy and wind energy and reducing the overall system energy consumption.

[0027] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0028] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0029] Figure 1 is a schematic structural diagram of a high, medium, and low pressure steam integrated supply system based on green electricity energy storage according to an embodiment of the present invention.

[0030] Reference Signs:

[0031] 10 - First cut-off valve, 11 - Heat pump heat storage make-up water pump, 12 - Heat pump heat storage make-up water pipe, 13 - Heat pump heat storage preheater, 14 - Heat pump heat storage inlet pipe, 15 - Heat pump return liquid pipe, 16 - Heat pump outlet liquid pipe, 17 - Heat pump expansion valve, 18 - Heat pump inlet liquid pipe, 19 - Heat pump evaporator; 20 - Heat pump evaporation pipe, 21 - Heat pump compressor, 22 - Heat pump exhaust pipe, 23 - Heat pump condensing pipe;

[0032] 30 - Heat pump heat storage water tank, 31 - Low-temperature flash evaporation first cut-off valve, 32 - Low-temperature flash evaporation circulation pump, 33 - Low-temperature flash evaporation circulation pipe, 34 - Low-temperature flash evaporation pressure reducing valve, 35 - Low-temperature flash evaporation second cut-off valve, 36 - Low-temperature flash evaporation atomizing nozzle, 37 - Low-temperature flash evaporation third cut-off valve, 38 - Low-temperature flash evaporation drain pipe, 39 - Low-temperature flash evaporation tank;

[0033] 40 - Low-temperature flash evaporation fourth cut-off valve, 41 - Low-temperature flash evaporation outlet liquid pipe, 42 - Low-temperature flash evaporation return water pump, 43 - Low-temperature flash evaporation return water pipe, 44 - Low-temperature flash evaporation fifth cut-off valve, 45 - Low-temperature flash evaporation sixth cut-off valve, 46 - Low-temperature flash evaporation return water bypass pipe;

[0034] 50 - Green power heat storage water tank, 51 - High-temperature flash evaporation first cut-off valve, 52 - High-temperature flash evaporation circulation pump, 53 - High-temperature flash evaporation circulation pipe, 54 - High-temperature flash evaporation pressure reducing valve, 55 - High-temperature flash evaporation second cut-off valve, 56 - High-temperature flash evaporation atomizing nozzle, 57 - High-temperature flash evaporation third cut-off valve, 58 - High-temperature flash evaporation drain pipe, 59 - High-temperature flash evaporation tank;

[0035] 60 - High-temperature flash evaporation fourth cut-off valve, 61 - High-temperature flash evaporation outlet liquid pipe, 62 - High-temperature flash evaporation return water pump, 63 - High-temperature flash evaporation return water pipe, 64 - High-temperature flash evaporation fifth cut-off valve, 67 - Steam supply first cut-off valve, 68 - Steam supply second cut-off valve, 69 - Steam supply third cut-off valve;

[0036] 70 - High-temperature flash evaporation outlet gas pipe, 71 - Ejector pump, 72 - Ejected outlet gas pipe, 73 - Low-temperature flash evaporation outlet gas pipe, 74 - Ejector tank atomizing nozzle, 75 - Ejector tank, 76 - Ejector tank exhaust pipe, 77 - Ejector tank cut-off valve, 78 - Ejector tank return water pipe;

[0037] 80 - Green power heat storage first cut-off valve, 81 - Green power heat storage circulation pump, 82 - Green power heat storage make-up water pipe, 83 - Green power heat storage second cut-off valve;

[0038] 90 - Solar power generation panel, 91 - First electric wire, 92 - Wind turbine, 93 - Second electric wire, 94 - First switch, 95 - Second switch, 96 - Battery, 97 - Third switch, 98 - Third electric wire, 99 - Fourth switch;

[0039] 100 - Fourth electric wire, 101 - Fifth switch, 102 - Green power heater. Detailed implementation manners

[0040] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0042] Next, reference is made to Figure 1 Describe a high, medium, and low pressure steam integrated supply system based on green power energy storage according to an embodiment of the present invention. As Figure 1 shown, a high, medium, and low pressure steam integrated supply system based on green power energy storage according to an embodiment of the present invention may include: a heat pump energy storage system, a green power energy storage system, a low-temperature flash evaporation system, a high-temperature flash evaporation system, and a gas supply system. Further, the heat pump energy storage system may include: a heat pump heat generation device and a heat pump heat storage device, wherein the heat pump heat generation device is used to heat the heat storage medium in the heat pump heat storage device to achieve the first-stage heat storage; specifically, the heat pump heat generation device may include: a heat pump heat storage preheater 13, a heat pump expansion valve 17, a heat pump evaporator 19, and a heat pump condenser tube 23; further, the heat pump heat storage preheater 13 is connected to one end of the heat pump condenser tube 23 through a heat pump return liquid pipe 15, the other end of the heat pump condenser tube 23 is connected to a heat pump exhaust pipe 22, the heat pump expansion valve 17 is connected to the heat pump heat storage preheater 13 through a heat pump liquid outlet pipe 16, the heat pump evaporator 19 is connected to the heat pump expansion valve 17 through a heat pump liquid inlet pipe 18, and a heat pump evaporation tube 20 is connected to the heat pump evaporator 19. Further, in a specific embodiment, the heat pump heat storage device may be a heat pump hot water tank 30, and the heat storage medium in the heat pump hot water tank 30 is heated to above 100 °C through the heating effect of the heat pump energy storage system during the night valley electricity, so as to achieve the first-stage heat storage. In a specific embodiment, the heat pump energy storage system may adopt the principle of an air source heat pump, which can effectively utilize the performance advantages of the air source heat pump, reduce the consumption of electric energy, and reduce the operation cost and expenses. In addition, the air source is a ubiquitous heat source, effectively solving the dependence of the application production site on the heat source.

[0043] Furthermore, the green power energy storage system may include: an energy supply device, an electricity storage device, and a green power heat storage device. Specifically, the electricity storage device is respectively connected to the energy supply device and the green power heat storage device through an electric energy transmission device. The energy supply device stores the generated electric energy in the electricity storage device, and the electricity storage device is used to heat the heat storage medium in the green power heat storage device to achieve secondary heat storage. Further, in a specific embodiment, the green power heat storage device may be a green power hot water tank 50, and the heat storage medium in the green power hot water tank 50 is heated to above 200°C by directly heating with valley electricity to store high-temperature and high-pressure medium, achieving secondary heat storage. Further, in a specific embodiment, the energy supply device may be a solar panel 90 and a wind turbine 92, the electricity storage device may be a storage battery 96, and the green power heat storage device may be a green power hot water tank 50, wherein a green power heater 102 is arranged in the green power hot water tank 50. Further, the solar panel 90 is connected to the first inlet end of the storage battery 96 through a first wire 91, a first switch 94, and the wind turbine 92 is connected to the second inlet end of the storage battery 96 through a second wire 93, a second switch 95. Further, the outlet end of the storage battery 96 is connected to a third switch 97 and a third wire 98, and the storage battery 96 supplies power to the heat pump energy storage system through the third wire 98 and a fifth switch 101. Further, the heat pump energy storage system supplies power to the green power heat storage device through the third wire 98, a fourth switch 99, and a fourth wire 100. In this way, when the integrated supply system is working properly, the green power is supplied through the solar panel 90 and the wind turbine 92 in the green power energy storage system, and the electric energy is stored in the storage battery 96.

[0044] Furthermore, as Figure 1As shown, the low-temperature flash evaporation system may include: a low-temperature flash evaporation tank 39 and a low-temperature flash evaporation pipeline. Specifically, the low-temperature flash evaporation tank 39 is connected to the heat pump heat storage device through the low-temperature flash evaporation pipeline, and the low-temperature flash evaporation tank 39 is used for performing low-temperature flash evaporation treatment on the heat storage medium in the heat pump heat storage device. It should be noted that after the heat storage medium undergoes low-temperature flash evaporation treatment, the temperature remains around 100°C. Further, the low-temperature flash evaporation pipeline may include: a first low-temperature flash evaporation stop valve 31, a low-temperature flash evaporation circulating pump 32, a low-temperature flash evaporation circulating pipe 33, a low-temperature flash evaporation pressure reducing valve 34, a second low-temperature flash evaporation stop valve 35, and a low-temperature flash evaporation atomizing nozzle 36. Specifically, when it is necessary to supply low-temperature medium steam around 100°C, the low-temperature flash evaporation system operates. Open the first low-temperature flash evaporation stop valve 31 and the second low-temperature flash evaporation stop valve 35, adjust the opening degree of the low-temperature flash evaporation pressure reducing valve 34, and send the high-temperature and high-pressure medium stored in the heat pump heat storage water tank 30 above 100°C through the low-temperature flash evaporation circulating pump 32 and the low-temperature flash evaporation circulating pipe 33 through the low-temperature flash evaporation atomizing nozzle 36 into the low-temperature flash evaporation tank 39, where it undergoes pressure-reducing flash evaporation in the low-temperature flash evaporation tank 39 to generate low-temperature medium steam with a temperature around 100°C and a pressure around 0.1 MPa, and a low-temperature saturated medium with a temperature around 100°C and a pressure of 0.1 MPa.

[0045] Further, as Figure 1 shown, the high-temperature flash evaporation system includes: a high-temperature flash evaporation tank 59 and a high-temperature flash evaporation pipeline. Specifically, the high-temperature flash evaporation tank 59 is connected to the green power heat storage device through the high-temperature flash evaporation pipeline, and the high-temperature flash evaporation tank 59 is used for performing high-temperature flash evaporation treatment on the heat storage medium in the green power heat storage device. It should be noted that after the heat storage medium undergoes high-temperature flash evaporation treatment, the temperature remains above 200°C. Further, the high-temperature flash evaporation pipeline may include: a first high-temperature flash evaporation stop valve 51, a high-temperature flash evaporation circulating pump 52, a high-temperature flash evaporation circulating pipe 53, a high-temperature flash evaporation pressure reducing valve 54, a second high-temperature flash evaporation stop valve 55, and a high-temperature flash evaporation atomizing nozzle 56. Specifically, when it is necessary to supply high-temperature medium steam above 200°C, the high-temperature flash evaporation system operates. Open the first high-temperature flash evaporation stop valve 51 and the second high-temperature flash evaporation stop valve 55, adjust the opening degree of the high-temperature flash evaporation pressure reducing valve 54, and send the high-temperature and high-pressure medium stored in the green power heat storage water tank 50 above 200°C through the high-temperature flash evaporation circulating pump 52 and the high-temperature flash evaporation circulating pipe 53 through the high-temperature flash evaporation atomizing nozzle 56 into the high-temperature flash evaporation tank 59, where it undergoes pressure-reducing flash evaporation in the high-temperature flash evaporation tank 59 to generate high-temperature medium steam with a temperature of 200°C and a pressure around 1.555 MPa, and a high-temperature saturated medium with a temperature of 200°C and a pressure of 1.555 MPa.

[0046] Further, as Figure 1As shown, the gas supply system may include: an ejector tank 75, an ejector pump 71, and an ejector pipeline. Specifically, the ejector tank 75 is connected to the low-temperature flash tank 39 and the high-temperature flash tank 59 respectively through the ejector pipeline. Further, the ejector pipeline includes a first steam supply stop valve 67, a third steam supply stop valve 69, a high-temperature flash outlet pipe 70, an ejector outlet pipe 72, and a low-temperature flash outlet pipe 73. The low-temperature flash tank 39 is connected to the ejector tank 75 through the first steam supply stop valve 67, the low-temperature flash outlet pipe 73. The high-temperature flash tank 59 is connected to the ejector tank 75 through the third steam supply stop valve 69, the high-temperature flash outlet pipe 70. The ejector outlet pipe 72 is arranged between the ejector pump 71 and the ejector tank 75.

[0047] Further, the operating modes of the gas supply system include a low-temperature supply mode, a medium-temperature supply mode, and a high-temperature supply mode. Further, in the low-temperature supply mode, the low-temperature flash system operates independently, and the heat storage medium after low-temperature flash treatment is transported to the ejector tank 75 to generate low-temperature steam at 100 °C. Specifically, when the user needs low-temperature medium steam, the first steam supply stop valve 67 and the second steam supply stop valve 68 are opened, and the low-temperature medium steam with a temperature near 100 °C and a pressure near 0.1 MPa passes through the low-temperature flash outlet pipe 73 and the ejector outlet pipe 72, flows through the ejector pump 71 and into the ejector tank 75, and then is sent to the user side through the ejector tank exhaust pipe 76 for the user to use.

[0048] Further, in the high-temperature supply mode, the high-temperature flash system operates independently, and the heat storage medium after high-temperature flash treatment is transported to the ejector tank 75 to generate high-temperature steam at 200 °C. Specifically, when the user needs high-temperature medium steam, the third steam supply stop valve 69 and the second steam supply stop valve 68 are opened, and the high-temperature medium steam with a temperature of 200 °C and a pressure near 1.555 MPa passes through the high-temperature flash outlet pipe 70 and the ejector outlet pipe 72, flows through the ejector pump 71 and into the ejector tank 75, and then is sent to the user side through the ejector tank exhaust pipe 76 for the user to use.

[0049] Further, in the medium-temperature supply mode, the low-temperature flash evaporation system and the high-temperature flash evaporation system operate together, and the heat storage medium processed by the low-temperature flash evaporation and the heat storage medium processed by the high-temperature flash evaporation are ejected into the ejector tank 75 through the ejector pump 71 to generate medium-temperature steam at 100-200 °C. Specifically, the high-temperature medium steam with a temperature above 200 °C generated by the high-temperature flash evaporation system in the high-temperature flash evaporation tank 59 and the low-temperature medium steam with a temperature near 100 °C generated by the low-temperature flash evaporation system in the low-temperature flash evaporation tank 39 are then used. The first steam supply stop valve 67, the second steam supply stop valve 68, and the third steam supply stop valve 69 are opened. Further, the high-temperature medium steam with a temperature above 200 °C in the high-temperature flash evaporation tank 59 flows into the ejector pump 71 through the high-temperature flash evaporation outlet pipe 70, ejecting the low-temperature medium steam with a temperature near 100 °C in the low-temperature flash evaporation tank 39. The low-temperature medium steam with a temperature near 100 °C in the low-temperature flash evaporation tank 39 flows into the ejector pump 71 through the low-temperature flash evaporation outlet pipe 73. The medium-temperature medium steam with a temperature of 100-200 °C generated after ejection flows into the ejector tank 75 through the ejector outlet pipe 72, and then is supplied to users through the ejector tank exhaust pipe 76. In this way, during the day, low-temperature and low-pressure steam is flashed out by the low-temperature flash evaporation system, and high-temperature and high-pressure steam is flashed out by the high-temperature flash evaporation system. The two can be separately supplied through the steam supply system, or the ejector pump 71 in the steam supply system can be used to eject the low-temperature and low-pressure steam with the high-temperature and high-pressure steam to achieve the supply of steam with intermediate pressure and temperature, to meet a wider range of demands, and at the same time reduce energy consumption.

[0050] The high-, medium-, and low-pressure steam integrated supply system based on green power energy storage according to the present invention has advantages such as a wide application range, low operating cost, and low system energy consumption.

[0051] In some embodiments, as Figure 1 shown, the green power energy storage system further includes a first conveying device. After the heat storage medium completes the first-stage heat storage in the heat pump heat storage device, the heat storage medium is conveyed to the green power heat storage device through the first conveying device. Specifically, the first conveying device may include a first green power heat storage stop valve 80, a green power heat storage circulation pump 81, a green power heat storage make-up water pipe 82, and a second green power heat storage stop valve 83. The heat storage medium heated to above 100 °C from the heat pump heat storage water tank 30 is sent into the green power heat storage water tank 50 by the green power heat storage circulation pump 81 through the first green power heat storage stop valve 80, the green power heat storage make-up water pipe 82, and the second green power heat storage stop valve 83 to ensure that there is sufficient heat storage medium stored in the green power heat storage water tank 50.

[0052] In some embodiments, the green power energy storage system further includes a green power heater 102. Specifically, the green power heater 102 is disposed in the green power heat storage device for heating the heat storage medium. Further, the heat pump heat generation device further includes a heat pump compressor 21. Further, the heat pump compressor 21 and the green power heater 102 are supplied with electric energy by the electricity storage device. In this way, the green power stored in the storage battery 96 can not only be used to supply the power consumption requirements of the heat pump compressor 21 and the green power heater 102, but also be used to meet the power consumption requirements of other devices in the steam integrated supply system when the steam integrated supply system is operating. At the same time, the solar panels 90 and wind turbines 92 in the steam integrated supply system can generate electricity through solar energy and wind energy, fully utilize clean energy, consume additional green power, supplement the power consumption of the system during the day, and provide the power consumption of the system at night.

[0053] In some embodiments, as Figure 1 shown, the heat pump energy storage system further includes a second conveying device, and the low-temperature flash tank 39 is connected to the ejector tank 75 through the second conveying device. Further, in the medium-temperature supply mode, the heat storage medium that has undergone the first-stage heat storage in the low-temperature flash tank 39 is introduced into the ejector tank 75 through the second conveying device to adjust the medium-temperature steam. Specifically, the second conveying device may include a low-temperature flash fourth stop valve 40, a low-temperature flash liquid discharge pipe 41, a low-temperature flash sixth stop valve 45, a low-temperature flash return water bypass pipe 46, and an ejector tank atomizing nozzle 74. Further, due to the different states and proportions of the high-temperature steam and the low-temperature steam, the medium-temperature steam may have a certain degree of superheat. At this time, the low-temperature flash fourth stop valve 40 and the low-temperature flash sixth stop valve 45 are opened, and the low-temperature saturated medium with a temperature of about 100°C and a pressure of 0.1 MPa in the low-temperature flash tank 39 passes through the low-temperature flash liquid discharge pipe 41 and the low-temperature flash return water bypass pipe 46, flows through the ejector tank atomizing nozzle 74 and is sprayed out in the ejector tank 75, absorbing the superheat of the medium-temperature medium steam, further cooling the medium-temperature medium steam, making the temperature close to the saturated state, and then supplied to the user through 76.

[0054] In some embodiments, as Figure 1As shown, the heat pump energy storage system further includes: a third conveying device. Specifically, the third conveying device is connected to the heat pump heat storage device, and the heat pump heat storage device replenishes the heat storage medium through the third conveying device. Further, the third conveying device may include: a first cut-off valve 10, a heat pump heat storage make-up water pump 11, a heat pump heat storage make-up water pipe 12, and a heat pump heat storage inlet pipe 14. Further, during the night valley electricity period when the electricity price is low and the electricity load is sufficient, the heat pump energy storage system operates normally. First, the heat storage medium is replenished in the heat pump heat storage water tank 30 of the heat pump energy storage system. The first cut-off valve 10 is opened, and the heat storage medium flows through the heat pump heat storage make-up water pump 11, the heat pump heat storage make-up water pipe 12, and the heat pump heat storage inlet pipe 14, passes through the heat pump heat storage preheater 13, and is replenished into the heat pump heat storage water tank 30 to ensure that there is sufficient heat storage medium stored in the heat pump heat storage water tank 30, completing the first replenishment of the heat storage medium. At the same time, the heat storage medium flows through a complete cycle of the heat pump energy storage system, extracts heat from the air in the heat pump evaporator 19, condenses and releases heat in the heat pump condenser tube 23 to heat the heat storage medium in the heat pump heat storage water tank 30, heating its temperature to above 100°C and the corresponding pressure to above 0.1 MPa, and keeping most of the heat storage medium in the heat storage medium in a liquid state within 30, with only a small amount in a vapor state, realizing the first-stage low-temperature heat storage. In the heat pump heat storage preheater 13, the heat pump working medium further preheats the supplementary heat storage medium from the external heat pump heat storage water tank 30.

[0055] Further, the heat storage medium is replenished in the green electricity heat storage water tank 50 of the green electricity energy storage system. The heat storage medium heated to above 100°C from the heat pump heat storage water tank 30 is sent into the green electricity heat storage water tank 50 by the green electricity heat storage circulation pump 81 through the green electricity heat storage first cut-off valve 80, the green electricity heat storage make-up water pipe 82, and the green electricity heat storage second cut-off valve 83 to ensure that there is sufficient heat storage medium stored in the green electricity heat storage water tank 50. At the same time, the first replenishment of the heat storage medium is repeated in the heat pump heat storage water tank 30, completing the second replenishment, and repeating the first-stage low-temperature heat storage process. Further, the heat storage medium in the green electricity heat storage water tank 50 is heated by the green electricity heater 102 using valley electricity, heating its temperature to above 200°C and the corresponding pressure to above 1.555 MPa, and keeping most of the heat storage medium in the green electricity heat storage water tank 50 in a liquid state, with only a small amount in a vapor state, realizing the second-stage high-temperature heat storage; finally, the high-temperature and low-temperature heat storage of valley electricity is realized using the high-temperature and high-pressure heat storage medium. Further, in addition to using valley electricity, the green electricity stored in the storage battery 96 at this time can also be used to supply the power consumption of the heat pump compressor 21 and the green electricity heater 102, further making full use of green electricity and reducing the electricity cost and the operating cost of the equipment.

[0056] In some embodiments, such as Figure 1As shown in the figure, the low-temperature flash evaporation system further includes a first return pipeline. Further, a low-temperature flash evaporation return water pump 42 is provided in the first return pipeline. Specifically, the low-temperature flash evaporation return water pump 42 is used to return the heat storage medium after flashing in the low-temperature flash evaporation tank 39 to the heat pump heat storage device through the first return pipeline. Further, a low-temperature flash evaporation return water pipe 43 and a low-temperature flash evaporation fifth stop valve 44 are also provided in the first return pipeline. During the normal operation of the steam comprehensive supply system, the heat storage medium remaining after flashing in the low-temperature flash evaporation tank 39 flows through the low-temperature flash evaporation return water pump 42 through the low-temperature flash evaporation liquid outlet pipe 41, the low-temperature flash evaporation return water pipe 43 and the low-temperature flash evaporation fifth stop valve 44, and returns to the heat pump heat storage water tank 30.

[0057] In some embodiments, as Figure 1 shown, the high-temperature flash evaporation system further includes a second return pipeline. Specifically, a high-temperature flash evaporation return water pump 62 is provided in the second return pipeline. Further, the high-temperature flash evaporation return water pump 62 is used to return the heat storage medium after flashing in the high-temperature flash evaporation tank 59 to the green power heat storage device through the second return pipeline. Further, a high-temperature flash evaporation fourth stop valve 60, a high-temperature flash evaporation liquid outlet pipe 61, a high-temperature flash evaporation return water pipe 63 and a high-temperature flash evaporation fifth stop valve 64 are also provided in the second return pipeline. During the normal operation of the steam comprehensive supply system, the heat storage medium remaining after flashing in the high-temperature flash evaporation tank 59 flows through the high-temperature flash evaporation return water pump 62 through the high-temperature flash evaporation liquid outlet pipe 61 and the high-temperature flash evaporation return water pipe 63, and returns to the green power heat storage water tank 50.

[0058] In some embodiments, as Figure 1 shown, the gas supply system further includes a third return pipeline. Specifically, the third return pipeline is connected to the first return pipeline, and the heat storage medium in the ejector tank 75 returns to the heat pump heat storage device through the third return pipeline and the first return pipeline. Further, an ejector tank stop valve 77 and an ejector tank return water pipe 78 are also provided in the third return pipeline. During the normal operation of the steam comprehensive supply system, the heat storage medium remaining after spraying and heat-absorbing gasification in the ejector tank 75 flows through the low-temperature flash evaporation return water pump 42 through the ejector tank return water pipe 78 and the low-temperature flash evaporation return water pipe 43, and returns to the heat pump heat storage water tank 30.

[0059] In some embodiments, the heat storage medium is a water working medium. By setting the heat storage medium as a water working medium, on the one hand, it is beneficial to reduce the use cost, and on the other hand, it reduces the corrosion of the water tank, thus effectively avoiding the problem of high use cost of molten salt heat storage in the prior art.

[0060] In some embodiments, a third low-temperature flash-off cut-off valve 37 and a low-temperature flash-off drain pipe 38 are provided at the bottom of the low-temperature flash-off tank 39. In this way, when the low-temperature flash-off tank 39 stops working or is under maintenance, the residual heat storage medium in the low-temperature flash-off tank 39 can be discharged from the low-temperature flash-off tank 39 through the third low-temperature flash-off cut-off valve 37 and the low-temperature flash-off drain pipe 38. Similarly, a third high-temperature flash-off cut-off valve 57 and a high-temperature flash-off drain pipe 58 are provided at the bottom of the high-temperature flash-off tank 59. In this way, when the high-temperature flash-off tank 59 stops working or is under maintenance, the residual heat storage medium in the high-temperature flash-off tank 59 can be discharged from the high-temperature flash-off tank 59 through the third high-temperature flash-off cut-off valve 57 and the high-temperature flash-off drain pipe 58.

[0061] Further, during the day, the green electricity energy storage system continues to operate, and the solar power generation panel 90 and the wind turbine 92 therein realize the supply of green electricity. First, the green electricity is stored in the storage battery 96 to supply the electricity consumption of the electrical equipment in the steam comprehensive supply system. The excess electricity will be stored in the storage battery 96 and first supply the electrical equipment at night. Only when the green electricity is used up at night will the valley electricity be used.

[0062] Further, the entire steam comprehensive supply system continuously operates to ensure the supply of different energy sources during the day. The high-temperature and high-pressure water working medium above 200°C stored in the green electricity heat storage water tank 50 and the high-temperature and high-pressure water working medium near 100°C stored in the heat pump heat storage water tank 30 are continuously consumed to meet the needs of different users. After the heat supply is completed during the day, a part of the water working medium stored in the green electricity heat storage water tank 50 and the heat pump heat storage water tank 30 is consumed, and the temperature also drops to a certain temperature range. Then, during the night, water replenishment and heating are carried out to form a complete cycle.

[0063] The present invention also provides a method for a high, medium, and low pressure steam comprehensive supply system based on green electricity energy storage. This method is applied to any high, medium, and low pressure steam comprehensive supply system based on green electricity energy storage as described in the first aspect, and thus has the advantages of a wide application range, low operating cost, and low system energy consumption.

[0064] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0065] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A high, medium and low pressure steam integrated supply system based on green power energy storage, characterized in that Comprising: A heat pump energy storage system, which includes a heat pump heat generation device and a heat pump heat storage device. The heat pump heat generation device is used to heat the heat storage medium in the heat pump heat storage device to achieve the first-stage heat storage. A green power energy storage system, which includes an energy supply device, a power storage device, and a green power heat storage device. The power storage device is electrically connected to the energy supply device and the green power heat storage device respectively. The energy supply device stores the generated electric energy in the power storage device, and the power storage device is used to heat the heat storage medium in the green power heat storage device to achieve the second-stage heat storage. A low-temperature flash evaporation system, which includes a low-temperature flash evaporation tank and a low-temperature flash evaporation pipeline. The low-temperature flash evaporation tank is connected to the heat pump heat storage device through the low-temperature flash evaporation pipeline, and the low-temperature flash evaporation tank is used to perform low-temperature flash evaporation treatment on the heat storage medium in the heat pump heat storage device. A high-temperature flash evaporation system, which includes a high-temperature flash evaporation tank and a high-temperature flash evaporation pipeline. The high-temperature flash evaporation tank is connected to the green power heat storage device through the high-temperature flash evaporation pipeline, and the high-temperature flash evaporation tank is used to perform high-temperature flash evaporation treatment on the heat storage medium in the green power heat storage device. A gas supply system, which includes an ejector tank, an ejector pump, and an ejector pipeline. The ejector tank is connected to the low-temperature flash evaporation tank and the high-temperature flash evaporation tank respectively through the ejector pipeline. The working modes of the gas supply system include a low-temperature supply mode, a medium-temperature supply mode, and a high-temperature supply mode. In the low-temperature supply mode, the low-temperature flash evaporation system operates independently, and the heat storage medium after the low-temperature flash evaporation treatment is transported to the ejector tank to generate low-temperature steam at 100°C. In the high-temperature supply mode, the high-temperature flash evaporation system operates independently, and the heat storage medium after the high-temperature flash evaporation treatment is transported to the ejector tank to generate high-temperature steam at 200°C. In the medium-temperature supply mode, the low-temperature flash evaporation system and the high-temperature flash evaporation system operate together, and the heat storage medium after the low-temperature flash evaporation treatment and the heat storage medium after the high-temperature flash evaporation treatment are ejected to the ejector tank through the ejector pump to generate medium-temperature steam at 100-200°C.

2. The integrated high, medium and low pressure steam supply system based on green power energy storage according to claim 1, characterized in that, The green power energy storage system further includes a first conveying device. After the heat storage medium completes the first-stage heat storage in the heat pump heat storage device, the heat storage medium is transported to the green power heat storage device through the first conveying device.

3. The high, medium, and low pressure steam integrated supply system based on green power energy storage according to claim 2, wherein The green power energy storage system further includes a green power heater, which is arranged in the green power heat storage device to heat the heat storage medium. The heat pump heat generation device further includes a heat pump compressor, and the heat pump compressor and the green power heater are supplied with electric energy by the power storage device.

4. The high, medium, and low pressure steam integrated supply system based on green power energy storage according to claim 1, wherein The heat pump energy storage system further includes a second conveying device. The low-temperature flash evaporation tank is connected to the ejector tank through the second conveying device. In the medium-temperature supply mode, the heat storage medium that has completed the first-stage heat storage in the low-temperature flash evaporation tank is introduced into the ejector tank through the second conveying device to adjust the medium-temperature steam.

5. The integrated high, medium, and low pressure steam supply system based on green power energy storage according to claim 4, wherein The heat pump energy storage system further includes: a third conveying device, the third conveying device is connected to the heat pump heat storage device, and the heat pump heat storage device supplements the heat storage medium through the third conveying device.

6. The integrated high, medium, and low pressure steam supply system based on green power energy storage according to claim 1, wherein The low-temperature flash evaporation system further includes: a first reflux pipeline, a low-temperature flash evaporation return water pump is provided in the first reflux pipeline, and the low-temperature flash evaporation return water pump is used to return the heat storage medium after flashing in the low-temperature flash evaporation tank to the heat pump heat storage device through the first reflux pipeline.

7. The integrated high, medium, and low-pressure steam supply system based on green power energy storage according to claim 6, wherein The high-temperature flash evaporation system further includes: a second reflux pipeline, a high-temperature flash evaporation return water pump is provided in the second reflux pipeline, and the high-temperature flash evaporation return water pump is used to return the heat storage medium after flashing in the high-temperature flash evaporation tank to the green power heat storage device through the second reflux pipeline.

8. The integrated high, medium and low pressure steam supply system based on green power energy storage according to claim 7, wherein, The gas supply system further includes: a third reflux pipeline, the third reflux pipeline is connected to the first reflux pipeline, and the heat storage medium in the ejector tank returns to the heat pump heat storage device through the third reflux pipeline and the first reflux pipeline.

9. The integrated high, medium and low pressure steam supply system based on green power energy storage according to claim 1, wherein, The heat storage medium is a water-based working fluid.

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