Heat pump steam supply system with water replenishing and temperature rising functions

Abstract

The utility model relates to the field of heat pump steam supply, in particular to a water replenishing and temperature rising heat pump steam supply system which is characterized in that a steam heater is arranged on a steam supply pipeline at the steam output end of a flash evaporation device, and a water replenishing pipeline is connected to a circulation pipeline of the flash evaporation device through the heat exchange side of the steam heater; the steam heater utilizes high-temperature and high-pressure steam evaporated by the flash evaporation device to heat supplementary water of the water supplementing pipeline, the supplementary water of the water supplementing pipeline is preheated for the first time, the temperature of the supplementary water is increased, and the output end of the steam heater is connected with the water supplementing pipeline. The condensate water generated after heat exchange and condensation of the steam in the steam supply pipeline and the make-up water in the water make-up pipeline is supplemented into the water make-up pipeline, so that the make-up water in the water make-up pipeline is preheated for the second time, the temperature of the make-up water is further increased, and the service life of the make-up water is prolonged. The temperature of the supplemented water is very close to that of high-temperature hot water in the flash evaporation device, so that the impact of low temperature of the supplemented water on stable operation of the system is avoided.

Description

Technical Field

[0001] This application relates to the field of heat pump steam supply, and relates to a heat pump steam supply system for water replenishment and temperature rise. Background Art

[0002] A heat pump is an energy-efficient device that makes full use of low-grade heat energy. Heat can spontaneously transfer from a high-temperature object to a low-temperature object, but it cannot spontaneously proceed in the opposite direction. The working principle of a heat pump is a mechanical device that forces heat to flow from a low-temperature object to a high-temperature object in a reverse cycle manner. It only consumes a small amount of net work in the reverse cycle and can obtain a large amount of heat supply, effectively utilizing the difficult-to-apply low-grade heat energy to achieve the purpose of energy conservation. The combination of a heat pump and flash technology heats the working fluid of the flash system through the heat pump. Utilizing the characteristic that the boiling point of the working fluid increases with the increase of pressure, when the high-pressure and high-temperature fluid is depressurized, its boiling point decreases and it enters the flash tank. The fluid temperature is higher than the boiling point at this pressure, and the fluid rapidly boils and vaporizes in the flash tank and undergoes two-phase separation, thereby producing high-pressure and high-temperature steam.

[0003] In the prior art, the coupling of heat pump technology and steam compression technology is used to further increase the temperature and pressure of the supplied steam. However, when these technologies supply heat, little consideration is given to the preheating problem of water replenishment. Directly introducing the water replenishment into the system not only reduces the heating temperature in the system, affects the safe and stable operation of the system, but also to a certain extent affects the steam generation amount and is not conducive to the generation of steam. Summary of the Utility Model

[0004] To solve or at least partially solve the above technical problems, this application provides a heat pump steam supply system for water replenishment and temperature rise, including:

[0005] A flash device for generating steam and water;

[0006] A heat pump heating device connected to the circulation pipeline of the flash device through a heat exchanger for heating the water in the circulation pipeline of the flash device;

[0007] A steam supply pipeline connected to the output end of the flash device for processing steam, and a steam heater is provided on the steam supply pipeline;

[0008] A water replenishment pipeline is connected to the circulation pipeline of the flash device after passing through the heat exchange side of the steam heater to generate the first preheated water through the heating of the steam heater;

[0009] Among them, the input end of the steam heater is connected to the steam supply pipeline, and the output end of the steam heater is connected to the make-up water pipeline, so as to supplement the condensed water generated after heat exchange and condensation of the steam in the steam supply pipeline and the make-up water in the make-up water pipeline into the make-up water pipeline. The make-up water pipeline is used to mix the first preheated water and the condensed water to obtain the second preheated water and supply it to the circulation pipeline of the flash evaporation device.

[0010] Optionally, the flash evaporation device includes a flash evaporation tank and a flash evaporation circulation pipeline connected to the flash evaporation tank. A circulation pump, a heat exchanger of the heat pump heating device, and a flash evaporation valve are sequentially connected to the flash evaporation circulation pipeline. The make-up water pipeline is connected to the pipeline between the heat exchanger and the flash evaporation valve.

[0011] Optionally, the make-up water pipeline includes a make-up water pump, a first make-up water pipe, and a second make-up water pipe. The first make-up water pipe is connected to the first heat exchange side inlet of the steam heater, and the second make-up water pipe is connected from the first heat exchange side outlet of the steam heater to the flash evaporation circulation pipeline.

[0012] Optionally, the steam heater further includes a first steam heating pipe and a second steam heating pipe. The first steam heating pipe is connected from the steam supply pipeline to the second heat exchange side inlet of the steam heater, and the second steam heating pipe is connected from the second heat exchange side outlet of the steam heater to the second make-up water pipe.

[0013] Optionally, the heat pump heating device includes a first heat pump circulation pipeline and a second heat pump circulation pipeline. The first heat pump circulation pipeline is connected to the second heat pump circulation pipeline through the heat exchange side of a first condenser. The heat exchanger includes a second condenser of the second heat pump circulation pipeline, and the heat exchange side of the second condenser is connected to the circulation pipeline of the flash evaporation device.

[0014] Optionally, the first heat pump circulation pipeline includes a first evaporator, a first compressor, a first condenser, and a first expansion valve connected in sequence through pipelines. The pipeline between the first condenser and the first expansion valve is connected to the first compressor through a first supplementary air pipeline.

[0015] Optionally, the second heat pump circulation pipeline includes a second compressor, a second condenser, a second expansion valve, and the first condenser of the first heat pump circulation pipeline connected in sequence through pipelines. The pipeline between the second condenser and the second expansion valve is connected to the second compressor through a second supplementary air pipeline.

[0016] Optionally, the steam supply pipeline includes a steam inlet pipe connected to the steam output end of the flash evaporation tank. The steam inlet pipe is connected to a steam compressor, and the output end of the steam compressor is connected to a steam exhaust pipe.

[0017] Optionally, the steam supply pipeline further includes a steam bypass pipe. The input end of the steam bypass pipe is connected to the steam inlet pipe, the output end of the steam bypass pipe is connected to the steam exhaust pipe, and the input end of the first steam heating pipe is connected to the steam exhaust pipe.

[0018] Optionally, the steam supply pipeline further includes a water spraying device. The water spraying device includes a water spray pipe, a water spray pump and a water spray regulating valve provided on the water spray pipe. The water spray pipe is connected to the compression chamber of the steam compressor.

[0019] In the heat pump steam supply system for water replenishment and temperature rise provided by the present application, a steam heater is arranged on the steam supply pipeline at the steam output end of the flash evaporation device. The water replenishment pipeline is connected to the circulating pipeline of the flash evaporation device through the heat exchange side of the steam heater. The steam heater uses the high-temperature and high-pressure steam from the flash evaporation device to heat the makeup water in the water replenishment pipeline, preheating the makeup water in the water replenishment pipeline for the first time and increasing the temperature of the makeup water. Moreover, the output end of the steam heater is connected to the water replenishment pipeline, and the condensed water generated after heat exchange and condensation between the steam in the steam supply pipeline and the makeup water in the water replenishment pipeline is replenished into the water replenishment pipeline again. In this way, the makeup water in the water replenishment pipeline is preheated for the second time, further increasing the temperature of the makeup water, so that the makeup water is replenished into the flash evaporation device at a temperature very close to the temperature of the high-temperature hot water in the flash evaporation device, avoiding the impact on the stable operation of the system caused by the low makeup water temperature. Brief Description of the Drawings

[0020] In order to more clearly illustrate the embodiments of the present application, the relevant drawings will be briefly introduced below. It can be understood that the drawings described below are only used to illustrate some embodiments of the present application, and those of ordinary skill in the art can also obtain many other technical features and connection relationships not mentioned in this text based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the heat pump steam supply system for water replenishment and temperature rise of the present application.

[0022] Description of the Reference Numerals:

[0023] 11. Waste heat inlet pipe; 12. First evaporator; 13. Waste heat outlet pipe; 14. First liquid return pipe; 15. First intake pipe; 16. First compressor; 17. First outlet pipe; 18. First condenser; 19. First condensate pipe; 20. First expansion valve; 21. First gas supply pipe before the valve; 22. First gas supply expansion valve; 23. First gas supply pipe after the valve; 31. Second intake pipe; 32. Second compressor; 33. Second outlet pipe; 34. Second condenser; 35. Second condensate pipe; 36. Second expansion valve; 37. Second liquid return pipe; 38. Second gas supply pipe before the valve; 39. Second gas supply expansion valve; 40. Second gas supply pipe after the valve; 41. Flash tank; 42. Flash pipe; 43. First stop valve; 44. First circulation pipe; 45. Circulation pump; 46. Second circulation pipe; 47. Second stop valve; 48. Flash valve; 49. Third stop valve; 50. Drain pipe; 51. First water supply pipe; 52. Water supply pump; 53. Second water supply pipe; 54. First regulating valve; 55. First steam heating pipe; 56. Steam heater; 57. Second steam heating pipe; 58. Fourth stop valve; 61. Water vapor intake pipe; 62. Fifth stop valve; 63. Water vapor compressor; 64. Water vapor exhaust pipe; 65. Second regulating valve; 66. Sixth stop valve; 67. Water vapor bypass pipe; 68. Spray pipe; 69. Spray regulating valve; 70. Spray water pump. Detailed implementation mode

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present utility model 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 therefore should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0027] Next, the technical solutions in the embodiments of the present application will be described in detail with reference to the accompanying drawings in the embodiments of the present application.

[0028] This embodiment provides a heat pump steam supply system for water replenishment and temperature rise. The system includes a flash evaporation device, a heat pump heating device, a water replenishment pipeline, a steam supply pipeline, and a steam heater connected to the steam supply pipeline.

[0029] As Figure 1 shown, the flash evaporation device has a flash evaporation tank 41 and a flash evaporation circulation pipeline connected to the flash evaporation tank 41. The flash evaporation circulation pipeline is connected to the flash evaporation tank 41 to form a closed loop, providing circulating water for the flash evaporation tank 41. The flash evaporation tank 41 is used to generate steam and liquid water to achieve gas-liquid separation.

[0030] Specifically, as Figure 1 shown, the flash evaporation circulation pipeline includes a first circulation pipe 44 and a second circulation pipe 46. A first stop valve 43 and a circulation pump 45 are provided on the first circulation pipe 44. The first circulation pipe 44 is connected from the bottom output end of the flash evaporation tank 41 to the heat exchanger of the heat pump heating device. The heat exchanger of the heat pump heating device is connected to a flash evaporation pipe 42 located inside the flash evaporation tank 41 through the second circulation pipe 46. A second stop valve 47 and a flash evaporation valve 48 are provided on the second circulation pipe 46 in sequence.

[0031] As Figure 1 shown, the water replenishment pipeline of this embodiment includes a water replenishment pump 52, a first water replenishment pipe 51, and a second water replenishment pipe 53. The first water replenishment pipe 51 is connected to an external water source and is connected to the second water replenishment pipe 53 through the water replenishment pump 52. The second water replenishment pipe 53 is connected to the second circulation pipe 46 in the flash evaporation circulation pipeline. Specifically, the second water replenishment pipe 53 is connected between the second stop valve 47 and the flash evaporation valve 48 to provide supplementary working medium for the flash evaporation circulation pipeline and ensure the normal and continuous operation of the flash evaporation device for producing steam.

[0032] In this embodiment, the steam output end of the flash evaporation tank 41 is connected to the steam supply pipeline, which is used to process the steam generated by the flash evaporation tank 41 and supply it to users.

[0033] Specifically, as Figure 1As shown, the steam supply pipeline includes a steam inlet pipe 61 connected to the steam output end of the flash tank 41. The steam inlet pipe 61 is connected to a steam compressor 63. The output end of the steam compressor 63 is connected to a steam exhaust pipe 64, and the steam exhaust pipe 64 leads to the user side to supply steam to the user. A fifth stop valve 62 is provided on the steam inlet pipe 61, and a second regulating valve 65 is provided on the steam exhaust pipe 64 for the on / off of steam output and flow control.

[0034] In one embodiment, as Figure 1 shown, the steam supply pipeline is provided with a steam bypass pipe 67. The input end of the steam bypass pipe 67 is connected to the steam inlet pipe 61 or directly connected to the steam output end of the flash tank 41. The output end of the steam bypass pipe 67 is connected to the steam exhaust pipe 64 or leads to the user side. The steam bypass pipe 67 does not pass through the steam compressor 63, so it can be used to supply low-temperature and low-pressure steam to the user to meet different needs of the user for steam. A sixth stop valve 66 is provided on the steam bypass pipe 67 for the on / off of the steam bypass pipe 67.

[0035] It is worth mentioning that in this embodiment, a steam heater 56 is also provided. The first heat exchange side of the steam heater 56 is connected to the make-up water pipeline, and the second heat exchange side of the steam heater 56 is connected to the steam supply pipeline, so as to use the steam heat of the steam supply pipeline to heat the make-up water in the make-up water pipeline, achieving the effect of preheating the make-up water.

[0036] Specifically, as Figure 1 shown, a first make-up water pipe 51 is connected to the inlet of the first heat exchange side of the steam heater 56, and a second make-up water pipe 53 is connected to the flash circulation pipeline from the outlet of the first heat exchange side of the steam heater 56. The steam heater 56 has a first steam heating pipe 55 and a second steam heating pipe 57. The first steam heating pipe 55 is connected from the steam exhaust pipe 64 of the steam supply pipeline to the inlet of the second heat exchange side of the steam heater 56, and the second steam heating pipe 57 is connected from the outlet of the second heat exchange side of the steam heater 56 to the second make-up water pipe 53.

[0037] In this way, the high-temperature and high-pressure steam in the steam exhaust pipe 64 of the steam supply pipeline passes through the steam heater 56, and at the same time, the make-up water in the make-up water pipeline also passes through the steam heater 56. In the steam heater 56, the high-temperature and high-pressure steam heats the make-up water, increasing the temperature of the make-up water and achieving the first heating of the make-up water in the make-up water pipeline, which is beneficial to reducing the impact of the relatively low temperature of the make-up water on the flash evaporation device. At the same time, the high-temperature and high-pressure steam releases heat in the steam heater 56, and the steam condenses to form liquid water. The liquid water flows into the second make-up water pipe 53 along the second steam heating pipe 57 and mixes with the make-up water that has been heated for the first time in the second make-up water pipe 53. Since the temperature of the high-temperature and high-pressure steam is relatively high, even if it condenses to form liquid water, its temperature may still be higher than that of the make-up water after the first heating. Therefore, the condensed water in the second steam heating pipe 57 heats the make-up water that has been heated for the first time in the second make-up water pipe 53 again, further increasing the temperature of the make-up water. Thus, the make-up water in the make-up water pipeline undergoes secondary preheating, and the temperature of the make-up water is further increased, enabling the make-up water to be replenished into the flash evaporation device at a temperature very close to that of the high-temperature hot water in the flash evaporation device, avoiding the impact of low make-up water temperature on the stable operation of the system.

[0038] In one embodiment, as Figure 1 shown, the steam supply pipeline further has a water spraying device. The water spraying device includes a water spraying pipe 68, a water spraying pump 70 and a water spraying regulating valve 69 provided on the water spraying pipe 68. The water spraying pipe 68 is connected to the compression chamber of the steam compressor 63, which can effectively reduce the exhaust superheat degree of the steam compressor 63, ensure the safe and stable operation of the unit, and improve the performance of the steam compressor 63 at the same time.

[0039] The heat pump heating device in this embodiment is a cascade heat pump system, which specifically includes a first heat pump circulation pipeline and a second heat pump circulation pipeline.

[0040] As Figure 1 shown, the first heat pump circulation pipeline includes a first evaporator 12. The inlet and outlet of one heat exchange side of the first evaporator 12 are respectively connected to the waste heat inlet pipe 11 and the waste heat outlet pipe 13. The inlet and outlet of the other heat exchange side of the first evaporator 12 are respectively connected to the first liquid return pipe 14 and the first intake pipe 15. The first intake pipe 15 is connected to the first compressor 16. The first compressor 16 is connected to the heat exchange side inlet of the first condenser 18 through the first outlet pipe 17. The heat exchange side outlet of the first condenser 18 is connected to the first expansion valve 20 through the first condensate pipe 19, and the first expansion valve 20 is connected to the first liquid return pipe 14 to form a loop.

[0041] As Figure 1As shown in the figure, the second heat pump circulation pipeline includes the first condenser 18 of the first heat pump circulation pipeline. The outlet of the heat exchange side of the first condenser 18 is connected to the second compressor 32 through the second intake pipe 31. The second compressor 32 is connected to the second condenser 34 through the second outlet pipe 33. The second condenser 34 is connected to the second expansion valve 36 through the second condensate pipe 35. The second expansion valve 36 is connected to the inlet of the heat exchange side of the first condenser 18 through the second liquid return pipe 37, thereby forming a loop of the second heat pump circulation pipeline.

[0042] In one embodiment, as Figure 1 shown in the figure, the first heat pump circulation pipeline also has a first gas supply pipeline. The first gas supply pipeline includes a first pre-valve gas supply pipe 21, a first gas supply expansion valve 22, and a first post-valve gas supply pipe 23. The first pre-valve gas supply pipe 21 is connected to the first condensate pipe 19 and is connected to the first post-valve gas supply pipe 23 through the first gas supply expansion valve 22. The first post-valve gas supply pipe 23 is connected to the first compressor 16. The first gas supply pipeline can achieve the effect of supplementing gas and increasing enthalpy for the first compressor 16.

[0043] Similarly, the second gas supply pipeline includes a second pre-valve gas supply pipe 38, a second gas supply expansion valve 39, and a second post-valve gas supply pipe 40. The second pre-valve gas supply pipe 38 is connected to the second condensate pipe 35 and is connected to the second post-valve gas supply pipe 40 through the second gas supply expansion valve 39. The second post-valve gas supply pipe 40 is connected to the second compressor 32. The second gas supply pipeline can also achieve the effect of supplementing gas and increasing enthalpy for the second compressor 32.

[0044] Of course, the heat pump heating device in this embodiment may not adopt a cascade heat pump system, but only one of the first heat pump circulation pipeline and the second heat pump circulation pipeline. For example, the heat pump heating device is only the first heat pump circulation pipeline. At this time, the first circulation pipe 44 of the flash evaporation device is connected to the inlet of the heat exchange side of the first condenser 18 through the circulation pump 45, and the second circulation pipe 46 is connected from the outlet of the heat exchange side of the first condenser 18 to the flash evaporation valve 48, which also has the effect of heating the water working medium of the flash evaporation device.

[0045] In this embodiment, a drain pipe 50 is further provided at the lower end of the flash evaporation tank 41. A third stop valve 49 is provided on the drain pipe 50. The drain pipe 50 is used to supply high-temperature water in the flash evaporation tank 41 to customers or for sewage discharge.

[0046] The specific working principle of this embodiment is as follows:

[0047] When the system of the embodiment of the present application works normally, the heat pump heating device works first, wherein the first heat pump circulation pipeline works, and the waste heat flows into the first evaporator 12 through the waste heat inlet pipe 11, and then flows out through the waste heat outlet pipe 13. The waste heat heats the primary working fluid in the first evaporator 12 in the first evaporator 12 to evaporate it. The evaporated primary working fluid flows into the first compressor 16 through the first air inlet pipe 15 to be compressed, and then flows into the first condenser 18 through the first air outlet pipe 17. The primary working fluid condenses in the first condenser 18 to release heat to heat the secondary working fluid in the first heat pump circulation pipeline to evaporate it. A part of the condensed primary working fluid flows through the first condenser pipe 19, passes through the first expansion valve 20, expands, cools down and reduces the pressure, and then flows back into the first evaporator 12 through the first return liquid pipe 14 to form a cycle; another part flows through the first condenser pipe 19 and the first valve front air supply pipe 21, passes through the first air supply expansion valve 22, expands, cools down and reduces the pressure, and then flows into the first compressor 16 through the first valve rear air supply pipe 23, absorbs the superheat of the compressed primary working fluid in the first compressor 16 and evaporates, and then is compressed and discharged from the first compressor 16, and flows into the first condenser 18 through the first outlet pipe 17 to form a cycle, thereby achieving the effect of air supply and enthalpy increase.

[0048] The circulation paths of the second heat pump circulation pipeline and the first heat pump circulation pipeline are basically the same. The difference is that the secondary working fluid absorbs the condensation heat of the primary working fluid and evaporates in the first condenser 18, and condenses and releases heat in the second condenser 34 to heat the water working fluid from the first circulation pipe 44 in the second condenser 34 to increase its temperature.

[0049] When the flash device and the steam supply pipeline are working, the first stop valve 43 and the second stop valve 47 are opened, and the high-temperature water working medium flashes at the top of the flash tank 41 through the flash pipe 42 to form saturated water vapor and saturated water. The saturated water vapor can be sucked away and compressed by the water vapor compressor 63 through the water vapor inlet pipe 61, and the saturated water flows through the first circulation pipe 44 through the first stop valve 43 to enter the circulation pump 45 for circulation, and is heated and heated when flowing into the second condenser 34. The heated high-temperature water passes through the second circulation pipe 46, flows through the second stop valve 47 and the flash valve 48, and is depressurized when flowing through the flash valve 48, and then flows into the flash tank 41 through the flash pipe 42 for flash evaporation.

[0050] There are two steam supply modes to choose from when the steam supply pipeline is working:

[0051] When the first steam supply mode is working, the fifth stop valve 62 and the second regulating valve 65 are opened, and the sixth stop valve 66 is closed. The steam with lower temperature and pressure generated in the flash tank 41 flows through the steam inlet pipe 61, through the fifth stop valve 62, and into the steam compressor 63. After being compressed, the temperature and pressure are increased to reach a higher temperature and pressure, and then the steam flows through the second regulating valve 65 through the steam exhaust pipe 64 to be supplied to users, thereby meeting the demand for higher pressure and higher temperature steam.

[0052] When the first steam supply mode works, the external water source flows through the water spray pipe 68, passes through the water spray regulating valve 69 and the water spray pump 70, and is sprayed into the compression chamber of the steam compressor 63. Water spraying in the compression chamber realizes atomization to absorb the temperature and pressure of the compressed steam, thereby reducing the exhaust superheat degree of the steam compressor 63 and ensuring the safe and stable operation of the system.

[0053] When the second steam supply mode works, the fifth stop valve 62 is closed, the sixth stop valve 66 and the second regulating valve 65 are opened. The steam with lower temperature and pressure enters the steam bypass pipe 67 through the steam inlet pipe 61, and is supplied to users after flowing through the sixth stop valve 66 and the steam exhaust pipe 64.

[0054] When the steam heater 56 works, the fourth stop valve 58 is opened, the first regulating valve 54 is adjusted, and the steam from the steam exhaust pipe 64 is introduced into the first steam heating pipe 55. It flows into the steam heater 56 through the first steam heating pipe 55. The high-temperature and high-pressure steam condenses and cools down in the steam heater 56, and is used to heat the make-up water from the first make-up water pipe 51. The condensed water formed after the high-temperature and high-pressure steam exchanges heat flows through the second steam heating pipe 57, passes through the fourth stop valve 58, and flows into the second make-up water pipe 53. In the second make-up water pipe 53, the condensed water is mixed with the make-up water to realize the secondary heating of the make-up water, further increasing the temperature of the make-up water. The mixed high-temperature water flows into the second circulation pipe 46 through the second make-up water pipe 53, and then flows into the flash tank 41 through the flash valve 48.

[0055] In this embodiment, by using heat pump technology for heating, the supply of low-pressure steam and high-temperature hot water can be realized. On the basis of coupling the steam compressor, the supply of high-temperature and high-pressure steam can be realized, meeting the various different heat use requirements of users. The heat pump can be in various different forms such as an air source heat pump, a waste heat source heat pump, and a ground source heat pump, effectively utilizing the abundant air energy, low-grade waste heat energy, and geothermal energy in the air, reducing the consumption of high-quality energy, and achieving the effect of energy conservation. This system is used to generate steam and domestic hot water, effectively avoiding the use of coal-fired boilers, eliminating the emissions of coal-fired boiler flue gas, and achieving the effect of environmental protection.

[0056] In the embodiment of the present utility model, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0057] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some 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 embodiments of the present utility model. In this specification, the schematic representations 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. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A heat pump steam supply system for water replenishment and temperature rise, characterized in that Comprising: A flash evaporation device for generating steam and water; A heat pump heating device connected to the circulation pipeline of the flash evaporation device through a heat exchanger for heating the water in the circulation pipeline of the flash evaporation device; A steam supply pipeline connected to the output end of the flash evaporation device for processing the steam, and a steam heater is provided on the steam supply pipeline; A make-up water pipeline is connected to the circulation pipeline of the flash evaporation device through the heat exchange side of the steam heater (56) to generate first preheated water through the heating of the steam heater (56); Wherein, the input end of the steam heater (56) is connected to the steam supply pipeline, and the output end of the steam heater (56) is connected to the make-up water pipeline to supplement the condensed water generated after heat exchange and condensation of the steam in the steam supply pipeline and the make-up water in the make-up water pipeline into the make-up water pipeline. The make-up water pipeline is used to mix the first preheated water and the condensed water to obtain second preheated water and supply it to the circulation pipeline of the flash evaporation device.

2. The heat pump steam supply system for water replenishment and temperature rise according to claim 1, wherein The flash evaporation device includes a flash evaporation tank (41) and a flash evaporation circulation pipeline connecting the flash evaporation tank (41). A circulation pump (45), the heat exchanger of the heat pump heating device, and a flash evaporation valve (48) are sequentially connected to the flash evaporation circulation pipeline. The make-up water pipeline is connected to the pipeline between the heat exchanger and the flash evaporation valve (48).

3. The heat pump steam supply system for water replenishment and temperature rise according to claim 2, characterized in that, The make-up water pipeline includes a make-up water pump (52), a first make-up water pipe (51), and a second make-up water pipe (53). The first make-up water pipe (51) is connected to the first heat exchange side inlet of the steam heater (56), and the second make-up water pipe (53) is connected to the flash evaporation circulation pipeline from the first heat exchange side outlet of the steam heater (56).

4. The heat pump steam supply system for water replenishment and temperature rise according to claim 3, wherein The steam heater (56) further includes a first steam heating pipe (55) and a second steam heating pipe (57). The first steam heating pipe (55) is connected to the second heat exchange side inlet of the steam heater (56) from the steam supply pipeline, and the second steam heating pipe (57) is connected to the second make-up water pipe (53) from the second heat exchange side outlet of the steam heater (56).

5. The heat pump steam supply system for water replenishment and temperature rise according to any one of claims 1-4, characterized in that The heat pump heating device includes a first heat pump circulation pipeline and a second heat pump circulation pipeline. The first heat pump circulation pipeline is connected to the second heat pump circulation pipeline through the heat exchange side of a first condenser (18). The heat exchanger includes a second condenser (34) of the second heat pump circulation pipeline, and the heat exchange side of the second condenser (34) is connected to the circulation pipeline of the flash evaporation device.

6. The heat pump steam supply system for water replenishment and temperature rise according to claim 5, wherein, The first heat pump circulation pipeline includes a first evaporator (12), a first compressor (16), a first condenser (18), and a first expansion valve (20) sequentially connected by pipelines. The pipeline between the first condenser (18) and the first expansion valve (20) is connected to the first compressor (16) through a first gas supply pipeline.

7. The heat pump steam supply system for water replenishment and temperature rise according to claim 6, characterized in that, The second heat pump circulation pipeline includes a second compressor (32), a second condenser (34), a second expansion valve (36) connected in sequence through pipelines, and a first condenser (18) of the first heat pump circulation pipeline. The pipeline between the second condenser (34) and the second expansion valve (36) is connected to the second compressor (32) through a second gas supply pipeline.

8. The heat pump steam supply system for water replenishment and temperature rise according to claim 4, characterized in that, The steam supply pipeline includes a steam inlet pipe (61) connected to the steam output end of the flash tank (41). The steam inlet pipe (61) is connected to a steam compressor (63), and the output end of the steam compressor (63) is connected to a steam discharge pipe (64).

9. The heat pump steam supply system for water replenishment and temperature rise according to claim 8, characterized in that, The steam supply pipeline further includes a steam bypass pipe (67). The input end of the steam bypass pipe (67) is connected to the steam inlet pipe (61), the output end of the steam bypass pipe (67) is connected to the steam discharge pipe (64), and the input end of the first steam heating pipe (55) is connected to the steam discharge pipe (64).

10. The heat pump steam supply system for water replenishment and temperature rise according to claim 8, characterized in that, The steam supply pipeline further includes a water spraying device. The water spraying device includes a water spray pipe (68), a water spray pump (70) and a water spray regulating valve (69) arranged on the water spray pipe (68). The water spray pipe (68) is connected to the compression cavity of the steam compressor (63).

Images