Cooling, heating, steam and electricity quadruple supply system and its working method

Abstract

The present application relates to a cooling, heating, steam and electricity quadruple supply system based on heat pump technology and valley electricity storage technology, which includes a cold storage and supply system, a heat pump energy storage system, a heat storage system, a flash evaporation system, a steam supply system, an expansion power supply system and an optional circulating return water system. The present application also relates to a working method of the cooling, heating, steam and electricity quadruple supply system as described above. The cooling, heating, steam and electricity quadruple supply system described herein utilizes the heat storage and refrigeration functions of the heat pump at the same time, and can supply cold water at 5-15°C, hot water at 120°C-200°C, steam at 120°C-200°C and above 200°C, and electricity.

Description

Technical Field

[0001] The present application relates to the field of heat pumps and energy-saving technology, and in particular to a cooling, heating, steam and electricity quadruple supply system and a working method thereof. Background Art

[0002] Steam boilers can provide high-temperature and high-pressure steam and are widely used in various process flows in industry and daily life. Existing boilers are mainly fuel boilers such as coal-fired boilers, gas-fired boilers, or electric boilers. However, traditional steam boiler storage is prone to produce greenhouse gases or high energy consumption. Therefore, boilers that use innovative energy-saving technologies such as heat pump steam systems will develop rapidly in the future.

[0003] At present, there are literatures that disclose heat pump steam supply methods based on heat pump waste heat recovery or molten salt, but they either rely on external waste heat or have high operating costs. As we all know, power supply includes peak power supply period and valley power supply period, and the power cost of valley power supply period is much lower than that of peak power supply period.

[0004] To this end, there is a continuous need in the art to develop a steam supply system that can combine heat pump technology and valley electricity storage technology. Summary of the invention

[0005] The purpose of this application is to provide a cooling, heating, steam and electricity quadruple supply system based on heat pump technology and valley electricity storage technology. Specifically, the cooling, heating, steam and electricity quadruple supply system described herein may include a cold storage and supply system, a heat pump energy storage system, a heat storage system, a flash evaporation system, a steam supply system, an expansion power supply system and an optional circulating water return system. The cooling, heating, steam and electricity quadruple supply system described herein utilizes the heat storage and refrigeration functions of the heat pump at the same time, and can supply cold water at 5-15℃, hot water at 120℃-200℃, steam at 120℃-200℃ and above 200℃, and electricity.

[0006] In order to solve the above technical problems, this application provides the following technical solutions.

[0007] In a first aspect, the present application provides a cooling, heating, steam and electricity quadruple supply system, characterized in that the cooling, heating, steam and electricity quadruple supply system comprises:

[0008] A cold storage and cooling system, the cold storage and cooling system comprising a cold water tank, a cold water tank water outlet pipe, a cold water tank water inlet pipe, a cold water tank air outlet pipe, a cold water tank air inlet pipe and a cooling coil, the cold water tank water inlet pipe is in fluid communication with the cold water tank for supplying cold water, the cooling coil is arranged in the cold water tank, the cold water tank air outlet pipe, the cooling coil and the cold water tank air inlet pipe form a fluid passage for supplying cold air;

[0009] A heat pump energy storage system, the heat pump energy storage system comprising a cold water storage tank, a heat pump compressor, a hot water storage tank and a heat pump expansion valve, wherein an evaporative cold storage coil is arranged in the cold water storage tank, and a condensing heat storage coil is arranged in the hot water storage tank, wherein the evaporative cold storage coil, the heat pump compressor, the condensing heat storage coil and the heat pump expansion valve are sequentially connected to form a fluid flow loop;

[0010] A heat storage system, the heat storage system comprising a heat storage water supply pump, a heat storage water supply pipe and a hot water storage tank, the hot water storage tank is provided with an electric heater, and the heat storage water supply pump and the heat storage water supply pipe are used to add external supplementary water to the hot water storage tank;

[0011] A flash evaporation system, wherein the flash evaporation system comprises a hot water storage tank, a flash evaporation circulation pump, a flash evaporation pressure reducing valve and a flash evaporation tank, wherein the hot water storage tank, the flash evaporation circulation pump, the flash evaporation pressure reducing valve and the flash evaporation tank are connected in sequence and used to transport water to be flashed into the flash evaporation tank, wherein a flash evaporation atomizing nozzle is arranged in the flash evaporation tank, and the flash evaporation tank is fluidly connected to a flash evaporation exhaust pipe and used to discharge water vapor after flash evaporation;

[0012] A steam supply system, the steam supply system comprising a flash tank, a flash exhaust pipe, a flash compression suction pipe, a flash compressor, a flash compression exhaust pipe, a flash water supply pump and a flash water supply pipe, wherein the flash tank is in fluid communication with the flash compressor through the flash exhaust pipe and the flash compression suction pipe, for conveying water vapor to be compressed to the flash compressor, wherein the flash compression exhaust pipe is in fluid communication with the flash compressor, for outputting compressed water vapor, wherein the flash water supply pipe is connected to the flash water supply pump, and the flash water supply pump is connected to the flash compressor, for adding external supplementary water to the flash compressor;

[0013] An expansion power supply system, the expansion power supply system comprises a flash tank, a flash exhaust pipe, a flash expansion air inlet pipe, a flash expander for power generation, a flash expansion exhaust pipe and a first electric wire, wherein the flash tank sequentially transports water vapor to the flash expander through the flash exhaust pipe and the flash expansion air inlet pipe, wherein the flash expansion exhaust pipe is connected to the flash expander for outputting water vapor in the flash expander, wherein the first electric wire is electrically connected to the flash expander for outputting electrical energy.

[0014] In one embodiment of the first aspect, the cold, heat, steam and electricity quadruplet supply system also includes a circulating return water system, which includes a flash tank, a heat pump and a hot water storage tank, wherein the flash tank, the heat pump, the hot water storage tank and the flash circulation pump are connected in sequence to form a fluid flow loop, and the heat pump is also connected to the heating pipe fluid for outputting hot water.

[0015] In an implementation manner of the first aspect, the heat storage system further includes a hot water storage tank drain pipe, which is connected to the hot water storage tank and is used to drain water in the hot water storage tank.

[0016] In an implementation manner of the first aspect, the cold storage and cooling supply system further includes a cold water tank drain pipe, which is connected to the cold water tank and is used to drain water in the cold water tank.

[0017] In one embodiment of the first aspect, the flash evaporation system further comprises a flash evaporation drain pipe, wherein the flash evaporation drain pipe is used to discharge saturated water in the flash evaporation tank.

[0018] In an implementation manner of the first aspect, the expansion power supply system further includes a first switch, a battery, a third switch and a third electric wire connected in sequence, and one end of the first switch is electrically connected to the first electric wire.

[0019] In an implementation manner of the first aspect, the expansion power supply system further includes a second switch, a second wire, and a third wire connected in sequence, and one end of the second switch is electrically connected to the first wire.

[0020] In a second aspect, the present application provides a working method of a cooling, heating, steam and electricity quadruple supply system, characterized in that the cooling, heating, steam and electricity quadruple supply system is the cooling, heating, steam and electricity quadruple supply system as described in the first aspect, and the method comprises the following steps:

[0021] S1: The heat pump energy storage system works, heating the water working medium in the hot water storage tank of the heat storage system, and at the same time cools the water working medium in the cold water storage tank of the cold storage cooling system to 5-15℃, supplying cold air or cold water to the outside;

[0022] S2: Using valley electricity to further heat the water working medium in the hot water storage tank of the heat storage system, and after flash evaporation by the flash evaporation system to generate steam and hot water in the flash tank, hot water is supplied to the outside;

[0023] S3: The flash evaporation system and steam supply system work to realize external steam supply;

[0024] S4: The expansion power supply system works to realize external power supply.

[0025] In an implementation manner of the second aspect, in step S3, it also includes adding external supplementary water to the flash compressor through a flash water supplement pipe and a flash water supplement pump.

[0026] In a third aspect, the present application provides a working method of a cooling, heating, steam and electricity quadruple supply system, characterized in that the cooling, heating, steam and electricity quadruple supply system is the cooling, heating, steam and electricity quadruple supply system as described in the first aspect, and the method comprises the following steps:

[0027] S1: The heat pump energy storage system works, heating the water working medium in the hot water storage tank of the heat storage system, and at the same time cools the water working medium in the cold water storage tank of the cold storage cooling system to 5-15℃, supplying cold air or cold water to the outside;

[0028] S2: Using valley electricity to further heat the water working medium in the hot water storage tank of the heat storage system, and after flash evaporation by the flash evaporation system to generate steam and hot water in the flash tank, hot water is supplied to the outside;

[0029] S3: The flash evaporation system and steam supply system work to realize external steam supply;

[0030] S4: The expansion power supply system works to realize external power supply;

[0031] S5: The circulating water return system works to circulate the hot water formed in the flash tank of the flash system to the hot water storage tank.

[0032] Compared with the prior art, the positive effects of the present invention are as follows.

[0033] 1. Based on the dual effects of cooling and heating of the heat pump, the heat pump is used to store cold and heat at the same time. The hot water in the hot water storage tank is first heated to 120°C to achieve the first-level medium-temperature heat storage, and the water working medium in the cold water storage tank is reduced to 5-15°C. The performance advantages of the heat pump can be effectively utilized to reduce the consumption of electricity, reduce operating costs and expenses, and no additional heat source is required, which effectively solves the dependence of the application production site on the heat source.

[0034] 2. By using valley electricity to store heat, thermal energy can be stored through electric heating during the low period of urban electricity consumption at night, which effectively solves the dependence of application production sites on heat sources and can also be used directly in many application scenarios without heat sources.

[0035] 3. During the low electricity consumption period in the city at night, a large amount of high-temperature thermal energy is stored through electric heating, and high-temperature and high-pressure steam is generated through flash evaporation and steam compression, avoiding the huge power consumption of direct use of electric boilers, as well as the high electricity prices and operating costs of electric boilers during peak power supply periods under peak and valley electricity. On the other hand, it reduces the operating costs of equipment and improves the economy of steam generation.

[0036] 4. By using high-temperature and high-pressure hot water above 200°C for heat storage, the water working medium is cheap, the use cost is low, and it does not corrode the water tank, effectively avoiding the high use cost of molten salt heat storage. By directly flashing high-temperature and high-pressure hot water above 200°C to generate high-temperature and high-pressure steam, the heat exchange temperature and heat exchange system required for molten salt heat storage are effectively avoided, the heat exchange efficiency is improved and the equipment cost is reduced.

[0037] 5. Through flash evaporation and coupling with a water vapor compressor, it can not only meet the demand for high-temperature and high-pressure steam above 200°C, but also meet the demand for medium-temperature and medium-pressure steam between 120-200°C, and can meet the steam demand in almost all ranges of industrial heating.

[0038] 6. At the same time, the expander power generation system can provide a certain amount of electricity while supplying steam. It can supply both electricity and heat, further reducing the overall energy consumption and operating costs of the system.

[0039] 7. At the same time, the circulating water return system is equipped with the function of supplying hot water, which further expands the available range and can meet the needs of more users. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A cooling, heating, steam and electricity quadruple supply system according to an embodiment of the present application is shown.

[0041] exist Figure 1 In the figure, the meanings of the reference numerals are as follows:

[0042] 10 cold water tank outlet pipe, 11 first stop valve, 12 second stop valve, 13 cold water tank outlet pipe, 14 third stop valve, 15 cold water tank inlet pipe, 16 fourth stop valve, 17 cold water tank inlet pipe, 18 cooling coil, 19 cold water tank, 20 fifth stop valve, 21 cold water tank drain pipe,

[0043] 30 evaporation cold storage coil, 31 heat pump suction pipe, 32 heat pump compressor, 33 heat pump outlet pipe, 34 condensation heat storage coil, 35 heat pump return pipe, 36 heat pump expansion valve, 37 heat pump outlet pipe,

[0044] 40 heat storage water supply pump, 41 heat storage water supply pipe, 42 sixth stop valve, 43 heat storage tank, 44 electric heater, 45 seventh stop valve, 46 heat storage tank drain pipe,

[0045] 49 flash first stop valve, 50 flash circulation pump, 51 flash circulation pipe, 52 flash pressure reducing valve, 53 flash second stop valve, 54 flash tank, 55 flash atomizing nozzle, 56 flash third stop valve, 57 flash drain pipe,

[0046] 60 the eighth stop valve, 61 the heat pump, 62 the heating pipe, 63 the ninth stop valve, 64 the circulation pipe, 65 the tenth stop valve,

[0047] 70 flash exhaust pipe, 71 flash fourth stop valve, 72 flash compression suction pipe, 73 flash fifth stop valve, 74 flash compressor, 75 flash compression exhaust pipe, 76 flash sixth stop valve, 77 flash water supply pump, 78 flash water supply pipe,

[0048] 80 flash expansion air inlet pipe, 81 flash seventh stop valve, 82 flash expander, 83 flash expansion exhaust pipe, 84 first electric wire, 85 first switch, 86 second switch, 87 second electric wire, 88 battery, 89 third switch, 90 third electric wire. DETAILED DESCRIPTION

[0049] Unless otherwise defined, technical or scientific terms used in the present specification and claims shall have the common meanings understood by persons having ordinary skills in the technical field to which the present invention belongs.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be connected, detachably connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0053] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings and embodiments of the present application.

[0054] In a specific embodiment, the present invention provides a cold, heat, steam and electricity quadruple supply system based on heat pump valley power storage, which mainly includes a cold storage cooling system, a heat pump energy storage system, a heat storage system, a steam system, a circulating water return system, a steam supply system and an expansion power supply system. The cold storage cooling system and the heat pump energy storage system are connected through a cold water storage tank 19, and the cold water storage tank 19 has a cold supply coil 18 and an evaporation cold storage coil 30. The heat pump energy storage system and the heat storage system are connected through a hot water storage tank 43, and the hot water storage tank 43 has a condensing heat storage coil 34 and an electric heater 44. The heat storage system and the flash evaporation system are connected through the hot water storage tank 43. The flash evaporation system and the circulating water return system are connected through a flash tank 54. The flash evaporation system and the steam supply system are connected through a flash tank 54. The flash evaporation system and the expansion power supply system are connected through a flash tank 54.

[0055] The cold storage and cooling system includes a cold water tank outlet pipe 10, a first stop valve 11, a second stop valve 12, a cold water tank air outlet pipe 13, a third stop valve 14, a cold water tank air inlet pipe 15, a fourth stop valve 16, a cold water tank inlet pipe 17, a cooling coil 18, a cold water tank 19, a fifth stop valve 20, and a cold water tank drain pipe 21. In this embodiment, the cold water tank inlet pipe 17 is connected to the cold water tank 19 for replenishing water to the cold water tank 19, and the fourth stop valve 16 is provided on the cold water tank inlet pipe 17. In this embodiment, the cold water tank outlet pipe 10 is connected to the cold water tank 19 for discharging cold water in the cold water tank 19 and supplying cold water to the user, and the first stop valve 11 is provided on the cold water tank outlet pipe 10. In this embodiment, the cold water tank 19 may be provided with an evaporative cold storage coil 30 and a cooling coil 18 that are not connected to each other. The cold water tank air inlet pipe 15, the cooling coil 18 and the cold water tank air outlet pipe 13 are fluidly connected in sequence to form a pipeline for supplying cold air. A fourth stop valve 16 may be provided on the cold water tank air inlet pipe 15, and a second stop valve 12 is provided on the cold water tank air outlet pipe 13. In this embodiment, the cold water tank drain pipe 21 is used to discharge waste water or unused water to the outside, and the cold water tank outlet pipe 10 is used to supply cold water to users for refrigeration.

[0056] The heat pump energy storage system includes a cold water storage tank 19, an evaporative cold storage coil 30, a heat pump suction pipe 31, a heat pump compressor 32, a heat pump outlet pipe 33, a condensing heat storage coil 34, a heat pump return pipe 35, a heat pump expansion valve 36, a heat pump outlet pipe 37 and a hot water storage tank 43. In this embodiment, the condensing heat storage coil 34 is arranged in the hot water storage tank 43, and the heat pump working medium after being compressed by the heat pump compressor 32 can condense and release heat in the condensing heat storage coil 34, and heat the water working medium in the hot water storage tank 43. The evaporative cold storage coil 30 is arranged in the cold water storage tank 19, and absorbs heat by evaporating the heat pump working medium to reduce the temperature of the water working medium in the cold water storage tank 19. In this embodiment, the evaporative cold storage coil 30, the heat pump suction pipe 31, the heat pump compressor 32, the heat pump outlet pipe 33, the condensing heat storage coil 34, the heat pump return pipe 35, the heat pump expansion valve 36 and the heat pump outlet pipe 37 are connected in sequence to form a loop suitable for the circulation of the heat pump working fluid.

[0057] The heat storage system includes a heat storage water supply pump 40, a heat storage water supply pipe 41, a sixth stop valve 42, a hot water storage tank 43, an electric heater 44, a seventh stop valve 45, and a hot water storage tank drain pipe 46. The heat storage water supply pipe 41 is in fluid communication with the hot water storage tank 43 through the heat storage water supply pump 40, and is used to replenish water to the hot water storage tank 43. The hot water storage tank drain pipe 46 is in fluid communication with the hot water storage tank 43, and is used to discharge hot water in the hot water storage tank 43. The sixth stop valve 42 is provided on the heat storage water supply pipe 41, and the seventh stop valve 45 is provided on the hot water storage tank drain pipe 46. The hot water storage tank 43 is also provided with an electric heater 44, which is used to heat the water working medium in the hot water storage tank 43.

[0058] The flash system includes a hot water storage tank 43, a first flash stop valve 49, a flash circulation pump 50, a flash circulation pipe 51, a flash pressure reducing valve 52, a second flash stop valve 53, a flash tank 54, a flash atomizing nozzle 55, a third flash stop valve 56, and a flash drain pipe 57. The hot water storage tank 43 is connected to the flash circulation pump 50, which is connected to the flash pressure reducing valve 52 through the flash circulation pipe 51, and the flash pressure reducing valve 52 is connected to the flash atomizing nozzle 55 disposed in the flash tank 54, for conveying the hot water in the hot water storage tank 43 to the flash tank 54. The first flash stop valve 49 is disposed on the pipeline connecting the hot water storage tank 43 and the flash circulation pump 50. The second flash stop valve 53 is disposed on the pipeline connecting the flash pressure reducing valve 52 and the flash atomizing nozzle 55. The flash evaporation drain pipe 57 is in fluid communication with the flash tank 54 for discharging water from the flash tank 54 , and a flash evaporation third stop valve 56 is disposed on the flash evaporation drain pipe 57 .

[0059] The circulating water return system includes a flash tank 54, an eighth stop valve 60, a heat pump 61, a heat supply pipe 62, a ninth stop valve 63, a circulation pipe 64, and a tenth stop valve 65. In this embodiment, the flash tank 54 is connected to the heat supply pump 61, and the eighth stop valve 60 is provided on the pipeline connecting the flash tank 54 and the heat supply pump 61. The heat supply pipe 62 is connected to the heat supply pump 61, and the ninth stop valve 63 is provided on the heat supply pipe. In addition, the heat pump 61 is also in fluid communication with the hot water storage tank 43 through the circulation pipe 64, and the tenth stop valve 65 may be provided on the circulation pipe 64. The hot water passing through the heat pump 61 can directly supply hot water to users through the heat supply pipe 62, and can also flow back to the hot water storage tank 43 through the circulation pipe 64.

[0060] The steam supply system includes a flash tank 54, a flash exhaust pipe 70, a fourth flash stop valve 71, a flash compression suction pipe 72, a fifth flash stop valve 73, a flash compressor 74, a flash compression exhaust pipe 75, a sixth flash stop valve 76, a flash water supply pump 77, and a flash water supply pipe 78. In this embodiment, the flash exhaust pipe 70 is in fluid communication with the flash tank 54, and is used to discharge the water vapor that has been flashed in the flash tank 54 and directly supply steam to the user. The flash exhaust pipe 70 may be provided with a fourth flash stop valve 71. At the same time, the flash tank 54 may also be in fluid communication with the flash compressor 74 through the flash exhaust pipe 70 and the flash compression suction pipe 72, and is used to convey the water vapor to be compressed to the flash compressor 74. The flash compression suction pipe 72 may be provided with a fifth flash stop valve 73. The compressed water vapor can be supplied to the user through the flash compression exhaust pipe 75. In addition, the flash water supply pipe 78, the flash water supply pump 77 and the flash compressor 74 may be connected in sequence to supply water to the flash compressor 74. The flash water supply pipe 78 may be provided with a flash sixth stop valve 76.

[0061] The expansion power supply system includes a flash tank 54, a flash exhaust pipe 70, a flash expansion air intake pipe 80, a flash seventh stop valve 81, a flash expander 82, a flash expansion exhaust pipe 83, a first wire 84, a first switch 85, a second switch 86, a second wire 87, a battery 88, a third switch 89 and a third wire 90. In this embodiment, the flash tank 54 can be fluidly connected to the flash expander 82 through the flash exhaust pipe 70 and the flash expansion air intake pipe 80 in sequence, and output water vapor to the flash expander 82. The flash expander 82 can generate electricity using water vapor, thereby supplying electricity. The flash exhaust pipe 70 can be provided with a flash seventh stop valve 81. The residual water vapor of the flash expander 82 after power generation can be discharged through the flash expansion exhaust pipe 83. In addition, the flash expander 82 can be electrically connected to one end of the second switch 86 through the first wire 84, and the other end of the first switch 85 can be electrically connected to the third wire 90 through the second wire 87 to supply power to the outside. At the same time, the flash expander 82 can be electrically connected to one end of the first switch 85 through the first wire 84, the other end of the first switch 85 is electrically connected to the battery 88, the battery 88 is electrically connected to one end of the third switch 89, and the other end of the third switch 89 is electrically connected to the third wire 90. With the help of the battery 88, the first switch 85 and the third switch 89, the power in the flash expander 82 can be stored and supplied to the outside in a controlled manner.

[0062] Next, we will combine Figure 1 Describe the working method of the cooling, heating, steam and electricity quadruple generation system described in this article.

[0063] During normal operation, the system heats the water working medium in the hot water storage tank 43 to about 120°C through the dual functions of cooling and heating of the heat pump energy storage system during valley power at night. While realizing the first level of heat storage in the heat storage system, the water working medium temperature in the cold storage water tank 19 of the cold storage and cooling system is reduced to below 15°C to realize cold storage, and then the hot water temperature is heated to above 200°C by valley power heating to store high-temperature and high-pressure hot water to realize the second level of heat storage. During daytime use, the flash evaporation system generates corresponding high-temperature and high-pressure water vapor, and couples the corresponding circulating water return system, steam supply system and expansion power supply system. Through the water pump, water vapor compressor and expander, high-temperature hot water, steam of different temperatures and pressures and electric energy are respectively supplied to meet different working conditions. At the same time, the cold storage and cooling system can also realize cooling by directly supplying cold water of 5-15°C, or by heat exchange supplying cold air.

[0064] When the system is working normally, during the off-peak hours at night, when the electricity price is cheap and the electricity load is sufficient, the cold storage cooling system and the heat storage system first replenish water working medium, open the sixth stop valve 42, and replenish water working medium into the hot water storage tank 43 through the heat storage water replenishment pump 40 and the heat storage water replenishment pipe 41 to ensure that sufficient water working medium is stored in the hot water storage tank 43, open the fourth stop valve 16, and replenish water working medium into the cold water storage tank 19 through the cold water storage tank inlet pipe 17 to ensure that sufficient water working medium is stored in the cold water storage tank 19. First, the heat pump energy storage system works, and the working medium flows through the evaporating cold storage coil 30, the heat pump suction pipe 31, the heat pump compressor 32, the heat pump outlet pipe 33, the condensing heat storage coil 34, the heat pump return pipe 35, the heat pump expansion valve 36 and the heat pump outlet pipe 37 in sequence to form a complete cycle. In the evaporative cold storage coil 30, heat is taken from the water medium in the cold storage water tank 19 to reduce its temperature to below 15°C, and in the condensing heat storage coil 34, heat is released by condensation to heat the water medium in the hot water storage tank 43 to about 120°C, thus realizing the first stage of heating. Then the valley electric heating system works, heating the water medium in the hot water storage tank 43 through the electric heater 44 to a temperature of above 200°C, with a corresponding pressure of above 1.555MPa, and keeping most of the water medium in the hot water storage tank 43 in liquid form, with only a small amount in the form of steam, thus realizing the second stage of heating, and finally realizing valley electric heat storage using high temperature and high pressure water medium.

[0065] During the daytime peak electricity period, when it is needed, the flash system works, opens the first flash stop valve 49 and the second flash stop valve 53, adjusts the opening of the flash pressure reducing valve 52, and flows the high-temperature and high-pressure water working medium above 200°C stored in the hot water storage tank 43 through the flash atomizing nozzle 55 through the flash circulation pump 50 and the flash circulation pipe 51 into the flash tank 54, and reduces the pressure and flashes in the flash tank 54 to generate high-temperature and high-pressure steam with a temperature of 120-200°C and a pressure of 0.199-1.555MPa, and high-temperature and high-pressure saturated water with a temperature of 120-200°C and a pressure of 0.199-1.555MPa.

[0066] Then, according to different user needs, the circulating return water system, steam supply system, expansion power supply system and cold supply and storage system can work separately or in combination.

[0067] When the circulating water return system is not working, the eighth stop valve 60 and the ninth stop valve 63 are opened, and the tenth stop valve 65 is closed. The high-temperature and high-pressure saturated water of 120-200°C in the flash tank 54 can be directly supplied to the user through the heat pump 61 and the heat pipe 62. When the user does not need hot water supply, the ninth stop valve 63 is closed and the tenth stop valve 65 is opened. The water working medium in the flash tank 54 is sent into the hot water storage tank 43 through the heat pump 61 and the circulation pipe 64 to form a complete cycle.

[0068] When the steam supply system is working, there can also be two different modes. According to different user needs, the high-temperature and high-pressure steam with a temperature of 120-200°C and a pressure of 0.199-1.555MPa can be supplied in two ways. The first is to close the fifth flash stop valve 73 and open the fourth flash stop valve 71. The high-temperature and high-pressure steam with a temperature of 120-200°C and a pressure of 0.199-1.555MPa can be directly supplied to users through 70. The second is to open 73 and close 71. The high-temperature and high-pressure steam with a temperature of 120-200°C and a pressure of 0.199-1.555MPa flows into the flash compressor 74 through the flash exhaust pipe 70 and the flash compression suction pipe 72. After being compressed by the flash compressor 74, the temperature and pressure are further increased to 200°C and 1.555MPa or more and supplied to users through the flash compression exhaust pipe 75, meeting the steam heat demand above 200°C. During the compression process of the flash compressor 74, it is also necessary to open the flash sixth stop valve 76, and the external supplementary water flows into the compression chamber of the flash compressor 74 through the flash water supply pump 77 and the flash water supply pipe 78 to reduce the superheat of the compression process and ensure the safety and efficiency of the compression process.

[0069] When the expansion power supply system is working, the seventh flash stop valve 81 is opened, and the high-temperature and high-pressure steam generated at a temperature of 120-200°C and a pressure of 0.199-1.555MPa flows into the flash expander 82 through the flash exhaust pipe 70 and the flash expansion air intake pipe 80, and expands and generates electricity through the flash expander 82. After expansion, the temperature and pressure of the high-temperature and high-pressure steam are further reduced and supplied to users through the flash expansion exhaust pipe 83. The generated electric energy also has two supply modes, one is the direct power supply mode, and the other is the energy storage power supply mode. In the direct power supply mode, the first switch 85 and the third switch 89 are disconnected, and the second switch 86 is closed. The power generated by the flash expander 82 is directly supplied to the user through the first wire 84, the second wire 87 and the third wire 90. In the energy storage power supply mode, the second switch 86 is disconnected, the first switch 85 is closed, and the power generated by the flash expander 82 is sent to the battery 88 through the first wire 84 for storage, and then when it is needed, the third switch 89 is closed again, and it is supplied to the user through the third wire 90.

[0070] When the cold supply and storage system is working during the day, it also provides cooling in two different modes, one is to directly supply cold water, and the other is to supply cold air through heat exchange. When supplying cold water, directly open the first stop valve 11 and the fourth stop valve 16, and supply cold water to users through the cold storage water tank outlet pipe 10, and return water and make-up water return through the cold storage water tank inlet pipe 17. When supplying cold air, open the second stop valve 12 and the third stop valve 14, and air flows into the cooling coil 18 through the cold storage water tank inlet pipe 15 and is cooled in the cold storage water tank 19. The cooled air is supplied to users through the cold storage water tank outlet pipe 13.

[0071] In the process of specific practical application, the entire system can choose four different functional modes according to user needs: cold water supply, cold air supply, hot water supply, steam supply and electricity supply.

[0072] During the day, the entire system is continuously operated to ensure the supply of different energy sources during the day. The high-temperature and high-pressure water medium above 200°C stored in the hot water storage tank 43 and the low-temperature water medium below 15°C stored in the cold water storage tank 19 are continuously consumed to meet the needs of different users. After the daytime heating is completed, the high-temperature and high-pressure water medium above 200°C stored in the hot water storage tank 43 is consumed, and the temperature is also reduced to a certain temperature range. The low-temperature water medium below 15°C stored in the cold water storage tank 19 is also consumed, and the temperature rises to above 15°C.

[0073] The above description of the embodiments is to facilitate those of ordinary skill in the art to understand and apply the present application. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without having to pay creative labor. Therefore, the present application is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the contents disclosed in the present application without departing from the scope and spirit of the present application are within the scope of the present application.

Claims

1. A cold, hot, steam and electricity quadruple supply system, characterized in that: The cold, heat, steam and electricity quadruple supply system includes: A cold storage and cooling system, the cold storage and cooling system comprising a cold water tank, a cold water tank water outlet pipe, a cold water tank water inlet pipe, a cold water tank air outlet pipe, a cold water tank air inlet pipe and a cooling coil, the cold water tank water outlet pipe is in fluid communication with the cold water tank for supplying cold water to the outside, the cooling coil is arranged in the cold water tank, the cold water tank air outlet pipe, the cooling coil and the cold water tank air inlet pipe form a fluid passage for supplying cold air to the outside; A heat pump energy storage system, the heat pump energy storage system comprising a cold water storage tank, a heat pump compressor, a hot water storage tank and a heat pump expansion valve, wherein an evaporative cold storage coil is arranged in the cold water storage tank, and a condensing heat storage coil is arranged in the hot water storage tank, wherein the evaporative cold storage coil, the heat pump compressor, the condensing heat storage coil and the heat pump expansion valve are sequentially connected to form a fluid flow loop; A heat storage system, the heat storage system comprising a heat storage water supply pump, a heat storage water supply pipe and a hot water storage tank, the hot water storage tank is provided with an electric heater, and the heat storage water supply pump and the heat storage water supply pipe are used to add external supplementary water to the hot water storage tank; A flash evaporation system, wherein the flash evaporation system comprises a hot water storage tank, a flash evaporation circulation pump, a flash evaporation pressure reducing valve and a flash evaporation tank, wherein the hot water storage tank, the flash evaporation circulation pump, the flash evaporation pressure reducing valve and the flash evaporation tank are connected in sequence and used to transport water to be flashed into the flash evaporation tank, wherein a flash evaporation atomizing nozzle is arranged in the flash evaporation tank, and the flash evaporation tank is fluidly connected to a flash evaporation exhaust pipe and used to discharge water vapor after flash evaporation; A steam supply system, the steam supply system comprising a flash tank, a flash exhaust pipe, a flash compression suction pipe, a flash compressor, a flash compression exhaust pipe, a flash water supply pump and a flash water supply pipe, wherein the flash tank is in fluid communication with the flash compressor through the flash exhaust pipe and the flash compression suction pipe, for conveying water vapor to be compressed to the flash compressor, wherein the flash compression exhaust pipe is in fluid communication with the flash compressor, for outputting compressed water vapor, wherein the flash water supply pipe is connected to the flash water supply pump, and the flash water supply pump is connected to the flash compressor, for adding external supplementary water to the flash compressor; An expansion power supply system, the expansion power supply system comprises a flash tank, a flash exhaust pipe, a flash expansion air inlet pipe, a flash expander for power generation, a flash expansion exhaust pipe and a first electric wire, wherein the flash tank sequentially transports water vapor to the flash expander through the flash exhaust pipe and the flash expansion air inlet pipe, wherein the flash expansion exhaust pipe is connected to the flash expander for outputting water vapor in the flash expander, wherein the first electric wire is electrically connected to the flash expander for outputting electrical energy.

2. The cooling, heating, steam and electricity quadruple supply system according to claim 1, characterized in that: The cold, heat, steam and electricity quadruple supply system also includes: A circulating water return system, the circulating water return system includes a flash tank, a heat pump and a hot water storage tank, wherein the flash tank, the heat pump, the hot water storage tank and the flash circulation pump are connected in sequence to form a fluid flow loop, and the heat pump is also connected to the heating pipe fluid for outputting hot water.

3. The cooling, heating, steam and electricity quadruple supply system according to claim 1 or 2, characterized in that: The heat storage system also includes a hot water storage tank drain pipe, which is connected to the hot water storage tank and is used to drain water from the hot water storage tank.

4. The cooling, heating, steam and electricity quadruple supply system according to claim 1 or 2, characterized in that: The cold storage and cooling system also includes a cold storage water tank drain pipe, which is connected to the cold storage water tank and is used to drain water in the cold storage water tank.

5. The cooling, heating, steam and electricity quadruple supply system according to claim 1 or 2, characterized in that: The flash evaporation system further comprises a flash evaporation drain pipe, which is used to discharge the saturated water in the flash evaporation tank.

6. The cooling, heating, steam and electricity quadruple supply system according to claim 1 or 2, characterized in that: The expansion power supply system further includes a first switch, a battery, a third switch and a third electric wire which are connected in sequence, and one end of the first switch is electrically connected to the first electric wire.

7. The cooling, heating, steam and electricity quadruple supply system according to claim 6, characterized in that: The expansion power supply system further includes a second switch, a second wire and a third wire which are connected in sequence, and one end of the second switch is electrically connected to the first wire.

8. A method for operating a cold, hot, steam and electricity quadruple supply system, characterized in that: The cooling, heating, steam and electricity quadruple supply system is the cooling, heating, steam and electricity quadruple supply system as described in any one of claims 1 to 7, and the method The following steps are involved: S1: The heat pump energy storage system works, heating the water working medium in the hot water storage tank of the heat storage system, and at the same time cools the water working medium in the cold water storage tank of the cold storage cooling system to 5-15℃, supplying cold air or cold water to the outside; S2: Using valley electricity to further heat the water working medium in the hot water storage tank of the heat storage system, and after flash evaporation by the flash evaporation system to generate steam and hot water in the flash tank, hot water is supplied to the outside; S3: The flash evaporation system and steam supply system work to realize external steam supply; S4: The expansion power supply system works to realize external power supply.

9. The method according to claim 8, characterized in that In step S3, it also includes adding external supplementary water to the flash compressor through the flash water supplementation pipe and the flash water supplementation pump.

10. A method for operating a cold, hot, steam and electricity quadruple supply system, characterized in that: The cooling, heating, steam and electricity quadruple supply system is the cooling, heating, steam and electricity quadruple supply system as claimed in claim 2, and the method The following steps are involved: S1: The heat pump energy storage system works, heating the water working medium in the hot water storage tank of the heat storage system, and at the same time cools the water working medium in the cold water storage tank of the cold storage cooling system to 5-15℃, supplying cold air or cold water to the outside; S2: Using valley electricity to further heat the water working medium in the hot water storage tank of the heat storage system, and after flash evaporation by the flash evaporation system to generate steam and hot water in the flash tank, hot water is supplied to the outside; S3: The flash evaporation system and steam supply system work to realize external steam supply; S4: The expansion power supply system works to realize external power supply; S5: The circulating water return system works to circulate the hot water formed in the flash tank of the flash system to the hot water storage tank.

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