Steam supply system

Abstract

The utility model provides a steam supply system, and belongs to the technical field of steam preparation. The steam supply system comprises a heating unit, a heat storage unit and a flash evaporation unit. The heating unit is used for providing a heat exchange medium, the heat storage unit comprises a liquid storage container, and the liquid storage container is used for storing heating liquid subjected to heat exchange with the heat exchange medium. The flash evaporation unit is used for receiving and flashing the heating liquid in the liquid storage container, the flash evaporation unit comprises a liquid inlet, a steam outlet and a liquid outlet, the liquid inlet is connected with the liquid storage container through a pipeline so as to receive the heating liquid, and the steam outlet is connected with a steam supply pipeline so as to provide steam to the outside; and the liquid outlet is connected with the liquid storage container through a pipeline so as to enable the flash liquid obtained after flash to flow back to the liquid storage container. The flash evaporation liquid obtained after flash evaporation flows back into the liquid storage container, the heat energy of the flash evaporation liquid is fully utilized, and the utilization rate of the heat energy is increased.

Description

Technical Field

[0001] The present application relates to the technical field of steam preparation, and in particular to a steam supply system. Background Art

[0002] Steam has a wide range of uses, including industrial production and heating. For example, processes such as coating and formation in the battery industry consume large quantities of steam. However, steam generation requires a large amount of thermal energy, and its low thermal energy utilization rate leads to high production costs. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems in the background art. To this end, one object of the present application is to provide a steam supply system to improve the utilization rate of thermal energy required for steam generation, thereby reducing production costs.

[0004] An embodiment of the present application provides a steam supply system, comprising a heating unit, a heat storage unit, and a flash evaporation unit. The heating unit is used to provide a heat exchange medium, the heat storage unit includes a liquid storage container, and the liquid storage container is used to store heated liquid after heat exchange with the heat exchange medium. The flash evaporation unit is used to receive and flash evaporate the heated liquid in the liquid storage container. The flash evaporation unit includes a liquid inlet, a steam outlet, and a liquid outlet. The liquid inlet is connected to the liquid storage container pipeline for receiving the heated liquid, the steam outlet is connected to the steam supply pipeline for externally providing steam, and the liquid outlet is connected to the liquid storage container pipeline for returning the flashed liquid obtained after flash evaporation to the liquid storage container.

[0005] In the technical solution of the embodiment of the present application, by returning the flash liquid obtained after flash evaporation to the liquid storage container, it is possible to not only realize the recycling of the flash liquid, but also recover the heat energy in the flash liquid to the liquid storage container, thereby realizing the recovery and utilization of heat energy. By making full use of the heat energy of the flash liquid to improve the utilization rate of heat energy, at the same time, it can further reduce the heating energy consumption required by the heating unit to heat the flash liquid returned to the liquid storage container, which is conducive to reducing the overall cost.

[0006] In some embodiments, the flash evaporation unit includes a flash tank, a pressure reducing valve, and a spray assembly. A liquid inlet, a steam outlet, and a liquid outlet are each disposed on the surface of the flash tank. The pressure reducing valve is disposed in the pipeline between the liquid inlet and the liquid storage container and is used to regulate the evaporation pressure within the flash tank. The spray assembly is disposed within the flash tank and connected to the liquid inlet. The spray assembly is used to receive and spray the heated liquid for flash evaporation. The pressure reducing valve and the spray assembly provide favorable flash evaporation conditions for the heated liquid within the flash tank, thereby facilitating steam generation.

[0007] In some embodiments, the flash evaporation unit further includes a stopper assembly disposed within the flash tank. The stopper assembly is positioned between the spray assembly and the steam outlet along the height of the flash tank to stop liquid droplets. By placing the stopper assembly between the spray assembly and the steam outlet, the occurrence of liquid droplets discharged from the spray assembly being discharged from the steam outlet is reduced, thereby improving both the utilization rate of the heated liquid and the quality of the steam.

[0008] In some embodiments, the stopper assembly includes a steam channel and a stopper disposed within the steam channel, wherein the steam channel has a first inner wall and a second inner wall facing each other, one end of the stopper being connected to one of the first inner wall and the second inner wall, and the other end of the stopper being bent toward a side closer to the spray assembly, with a gap being formed between the other end of the stopper and the other of the first inner wall and the second inner wall. The provision of the stopper with a bent structure can both stop liquid droplets and allow steam to pass through.

[0009] In some embodiments, a plurality of stoppers are provided, with a portion of the plurality of stoppers located on the first inner wall and the remainder of the plurality of stoppers located on the second inner wall. The stoppers located on the first inner wall and the stoppers located on the second inner wall are alternately arranged along the extension direction of the steam channel. By providing the plurality of stoppers alternately on the opposing first and second inner walls, a zigzag-shaped steam channel is formed, further reducing the probability of liquid droplets passing through the steam channel, thereby effectively stopping the droplets.

[0010] In some embodiments, a flash tank includes an outer tank body, an inner tank body, and a first insulation layer. The inner tank body is disposed within the outer tank body, and the first insulation layer is disposed in the space between the outer and inner tank bodies. Providing the first insulation layer within the flash tank minimizes heat loss from the flashed liquid, thereby further improving heat utilization after the flashed liquid flows back into the liquid storage container.

[0011] In some embodiments, the steam supply system further includes a liquid replenishment line connected to the flash tank for replenishing liquid into the flash tank. By providing the liquid replenishment line, a certain amount of liquid is replenished into the system to compensate for the consumption of the heated liquid during the flash evaporation process, thereby enabling the entire system to operate continuously and stably.

[0012] In some embodiments, the heating unit includes an evaporator and a first condenser connected to the evaporator via a pipe for circulating a heat exchange medium. The evaporator is configured to absorb external heat, and the first condenser is configured to heat the liquid. By providing the evaporator with external heat absorption, the external heat is fully utilized to heat the heated liquid, thereby reducing the energy consumption required by the heating unit to heat the heated liquid in the liquid storage container.

[0013] In some embodiments, the heating unit is further configured to be connected to a steam supply line for heating the steam in the steam supply line. The heating unit further heats the steam in the steam supply line to obtain steam at a higher temperature to meet higher temperature steam demand.

[0014] In some embodiments, the heating unit further comprises a second condensation section disposed in the steam supply line, the second condensation section being connected to the evaporation section line in parallel with the first condensation section. The parallel arrangement of the second condensation section and the first condensation section allows the second condensation section and the first condensation section to operate independently of each other, thereby better heating the heating liquid in the liquid storage container and the steam in the steam supply line.

[0015] In some embodiments, the liquid storage container includes an outer body, an inner body, and a second insulation layer. The inner body is disposed within the outer body, and the second insulation layer is disposed in the space between the outer and inner bodies. Providing the second insulation layer within the liquid storage container minimizes heat loss from heating the liquid, thereby further improving heat energy utilization.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0018] Figure 1 This is a schematic structural diagram of a steam supply system according to some embodiments of the present application;

[0019] Figure 2 This is a schematic structural diagram of a flash tank in some embodiments of the present application;

[0020] Figure 3 This is a schematic structural diagram of a stopper assembly in some embodiments of the present application;

[0021] Figure 4 This is a schematic structural diagram of a liquid storage container according to some embodiments of the present application.

[0022] Description of reference numerals:

[0023] 100. Steam supply system;

[0024] 10. Heating unit; 11. Evaporation unit; 12. First condensation unit; 13. Compressor; 14. Expansion valve; 15. Second condensation unit; 16. First circuit; 161. First electric valve; 162. Second check valve; 17. Second circuit; 171. Second electric valve;

[0025] 20. Heat storage unit; 21. Liquid storage container; 211. Outer body; 212. Inner body; 213. Second insulation layer; 214. Second sewage outlet; 215. Return outlet;

[0026] 30. Flash unit; 31. Liquid inlet; 32. Steam outlet; 33. Liquid outlet; 34. Flash tank; 341. Outer tank body; 342. Inner tank body; 343. First insulation layer; 35. Pressure reducing valve; 36. Spray assembly; 37. First drain outlet; 38. Stop assembly; 381. Steam channel; 382. Stopper;

[0027] 40. Steam supply pipeline;

[0028] 50. Liquid pump;

[0029] 60. First check valve;

[0030] 70. Fluid infusion line;

[0031] P, steam flow path. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0034] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0035] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0037] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0038] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application 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 cannot be understood as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0040] Steam has a wide range of uses, including industrial production and heating. For example, processes such as coating and formation in the battery industry consume large quantities of steam. In some cases, steam is generated by heating water, which evaporates to form steam. This requires a significant amount of thermal energy, and the energy used to heat the water is wasted, resulting in low thermal energy utilization and high production costs.

[0041] Based on the above considerations, the present application provides a steam supply system, including a heating unit, a heat storage unit, and a flash evaporation unit. The heating unit is used to provide a heat exchange medium, and the heat storage unit includes a liquid storage container, which is used to store heated liquid after heat exchange with the heat exchange medium. The flash evaporation unit is used to receive and flash evaporate the heated liquid in the liquid storage container. The flash evaporation unit includes a liquid inlet, a steam outlet, and a liquid outlet. The liquid inlet is connected to the liquid storage container pipeline for receiving the heated liquid, the steam outlet is used to connect to the steam supply pipeline for providing steam to the outside, and the liquid outlet is connected to the liquid storage container pipeline for returning the flashed liquid obtained after flash evaporation to the liquid storage container.

[0042] By returning the flash liquid obtained after flash evaporation to the liquid storage container, it is possible to not only realize the recycling of the flash liquid, but also recover the heat energy in the flash liquid to the liquid storage container, thereby realizing the recovery and utilization of heat energy. By making full use of the heat energy of the flash liquid to improve the utilization rate of heat energy, at the same time, it can further reduce the heating energy consumption required by the heating unit to heat the flash liquid returned to the liquid storage container, which is conducive to reducing overall costs.

[0043] The steam supply system disclosed in the embodiments of the present application can be used, but is not limited to, in processes such as coating and formation in battery production.

[0044] like Figure 1 As shown, Figure 1 Schematic diagram of the structure of the steam supply system of some embodiments of the present application. The embodiment of the present application provides a steam supply system 100, including a heating unit 10, a heat storage unit 20 and a flash unit 30. The heating unit 10 is used to provide a heat exchange medium, and the heat storage unit 20 includes a liquid storage container 21, and the liquid storage container 21 is used to store the heated liquid after heat exchange with the heat exchange medium. The flash unit 30 is used to receive and flash the heated liquid in the liquid storage container 21. The flash unit 30 includes a liquid inlet 31, a steam outlet 32 ​​and a liquid outlet 33. The liquid inlet 31 is connected to the liquid storage container 21 pipeline for receiving the heated liquid, the steam outlet 32 ​​is used to be connected to the steam supply pipeline 40 for providing steam to the outside, and the liquid outlet 33 is connected to the liquid storage container 21 pipeline for returning the flashed liquid obtained after flashing to the liquid storage container 21.

[0045] The heating unit 10 is a component for heating a heat exchange medium. In some embodiments, the heating unit 10 can be configured as a heat pump. The heat pump recovers heat energy from low- and medium-temperature industrial wastewater and exhaust gas to heat the heat exchange medium, thereby converting low-grade heat energy into usable high-grade heat energy. The heated heat exchange medium then exchanges heat with a heating liquid, transferring heat to the heating liquid to facilitate steam production from the higher-temperature heating liquid. The heat exchange medium used in the heat pump can be a refrigerant, and the heating liquid can be water.

[0046] The heat storage unit 20 is a component for storing the heated liquid after heat exchange. The heated liquid after heat exchange has a high thermal energy, which can be stored in the heat storage unit 20, thereby realizing energy storage. In some embodiments, the heating unit 10 configured as a heat pump also includes a compressor, which is used to pressurize the heat exchange medium to obtain a high-temperature and high-pressure heating medium. The compressor consumes a certain amount of electricity. During power off periods, the heat pump can be used to recover the heat energy and store it in the heat storage unit 20. During power peak periods, the stored heat energy can be released, which not only enables on-demand use of heat energy, but also optimizes system configuration, realizes off-peak operation, and reduces operating costs. Among them, the liquid storage container 21 of the heat storage unit 20 can be a storage tank.

[0047] The flash unit 30 is a component used to quickly convert the heated liquid into steam. The principle of flash evaporation is that after the high-pressure saturated heated liquid enters the low-pressure flash unit 30 from the liquid inlet 31, due to the sudden drop in pressure, the saturated heated liquid becomes saturated steam and saturated liquid under the pressure within the flash unit 30. The saturated steam is output to the steam-consuming equipment through the steam outlet 32 ​​and the steam supply pipeline 40 in turn. Among them, the saturated liquid is the flash liquid obtained after flash evaporation. The flash liquid is lower in temperature than the heated liquid, but the flash liquid still has a certain amount of thermal energy. The flash liquid is returned to the liquid storage container 21 through the liquid outlet 33 to realize heat energy recovery and improve the utilization rate of thermal energy. The flash liquid returned to the liquid storage container 21 is further heated by the heating unit 10 for flash evaporation, realizing the recycling of the flash liquid. The flash liquid with a certain amount of thermal energy reduces the heating energy consumption of the heating unit 10 to a certain extent.

[0048] In some embodiments, a liquid pump 50 and a first check valve 60 may be provided on the pipeline connecting the liquid outlet 33 and the liquid storage container 21 to provide power for the reflux of the flashed liquid, so that the flashed liquid can flow back into the liquid storage container 21 more efficiently.

[0049] By returning the flash liquid obtained after flash evaporation to the liquid storage container 21, it is possible to not only realize the recycling of the flash liquid, but also recover the heat energy in the flash liquid to the liquid storage container 21, thereby realizing the recovery and utilization of heat energy. By making full use of the heat energy of the flash liquid to improve the utilization rate of heat energy, at the same time, it can further reduce the heating energy consumption required by the heating unit 10 to heat the flash liquid returned to the liquid storage container 21, which is conducive to reducing the overall cost.

[0050] Combine Figure 1 and Figure 2 As shown, Figure 2Schematic diagram of the flash tank structure of some embodiments of the present application. According to some embodiments of the present application, the flash unit 30 includes a flash tank 34, a pressure reducing valve 35, and a spray assembly 36. The liquid inlet 31, the steam outlet 32, and the liquid outlet 33 are respectively disposed on the surface of the flash tank 34. The pressure reducing valve 35 is disposed in the pipeline between the liquid inlet 31 and the liquid storage container 21. The pressure reducing valve 35 is used to adjust the evaporation pressure within the flash tank 34. The spray assembly 36 is disposed within the flash tank 34 and connected to the liquid inlet 31. The spray assembly 36 is used to receive and spray the heated liquid for flash evaporation.

[0051] In some embodiments, along the height of flash tank 34, liquid inlet 31 and steam outlet 32 ​​are located at the top of flash tank 34, and liquid outlet 33 is located at the bottom of flash tank 34. Flashed liquid obtained after flash evaporation of the heated liquid is located in the lower half of flash tank 34, and steam obtained after flash evaporation of the heated liquid is located in the upper half of flash tank 34. The space occupied by the steam is the gas phase space. A first drain outlet 37 is also provided at the bottom of flash tank 34.

[0052] Based on the principle of flash evaporation, the pressure in the flash tank 34 is relatively low, so that the high-pressure saturated heated liquid can form steam after entering the low-pressure flash tank 34 from the liquid inlet 31. By setting the pressure reducing valve 35, not only the pressure of the pipeline can be adjusted, but also the flash tank 34 can be provided with heated liquid of appropriate pressure, so that the heated liquid can flash evaporate at an appropriate evaporation pressure, thereby improving the steam generation efficiency.

[0053] The spray assembly 36 is used to atomize the heating liquid into droplets. The heating liquid in the droplet shape is more likely to flash evaporate into steam, thereby improving the steam generation efficiency.

[0054] By providing the pressure reducing valve 35 and the spray assembly 36 , good flashing conditions are provided for the flashing of the heated liquid in the flash tank 34 , thereby facilitating the generation of steam.

[0055] Combine Figure 1 and Figure 2 As shown, according to some embodiments of the present application, the flash unit 30 further includes a stopper assembly 38 disposed in the flash tank 34. Along the height direction of the flash tank 34, the stopper assembly 38 is located between the spray assembly 36 and the steam outlet 32, and the stopper assembly 38 is used to stop liquid droplets.

[0056] The stopper assembly 38 is a component used to stop liquid droplets within the flash tank 34. The heated liquid sprayed from the spray assembly 36 is in the form of light droplets, which are easily discharged from the steam outlet 32. The stopper assembly 38 stops the droplets within the flash tank 34. This not only reduces the loss of heated liquid used for flash evaporation, but also reduces the droplet content in the steam output from the steam outlet 32, thereby improving the quality of the steam.

[0057] In some embodiments, the stopper assembly 38 can be configured as a baffle. Liquid droplets can be stopped by the baffle and retained in the flash tank for flash evaporation. Since the steam density is relatively low, the baffle will not affect the discharge of steam from the steam outlet 32 ​​.

[0058] By arranging the stopper assembly 38 between the spray assembly 36 and the steam outlet 32, the phenomenon of liquid droplets output by the spray assembly 36 being discharged from the steam outlet is reduced, thereby improving the utilization rate of the heated liquid and the quality of the steam.

[0059] like Figure 3 As shown, Figure 3 Schematic diagram of the structure of a stopper assembly according to some embodiments of the present application. According to some embodiments of the present application, the stopper assembly 38 includes a steam channel 381 and a stopper 382 disposed within the steam channel 381. The steam channel 381 has a first inner wall and a second inner wall facing each other. One end of the stopper 382 is connected to one of the first inner wall and the second inner wall, and the other end of the stopper 382 is bent toward a side closer to the spray assembly, with a gap between the other end of the stopper 382 and the other of the first inner wall and the second inner wall.

[0060] The steam passage 381 can be constructed as a passage between two spaced-apart plates. One end of the stopper 382 can be connected to the first inner wall, and the other end of the stopper 382 can be bent toward the side near the spray assembly. The stopper 382 and the first inner wall together define a recessed portion with an opening, with the opening of the recessed portion facing the spray assembly 36. Utilizing the different inertias of steam and liquid droplets, the liquid droplets can be stopped by the recessed portion, thereby being retained in the flash tank 34 for flash evaporation, thereby capturing the liquid droplets. Steam can then pass through the gap between the other end of the stopper 382 and the second inner wall and be discharged from the steam outlet 32.

[0061] In some embodiments, the steam channel 381 can be set to be curved. The curved steam channel 381 can increase the length of the steam channel 381, and the curved part of the steam channel 381 can also play a certain stopping role on the droplets, that is, it can further reduce the probability of the droplets passing through the steam channel.

[0062] The stopper 382 with a bent structure can stop the liquid droplets while allowing the steam to pass through.

[0063] like Figure 3 As shown, according to some embodiments of the present application, a plurality of stoppers 382 are provided, a portion of the plurality of stoppers 382 are located on the first inner wall, and the rest of the plurality of stoppers 382 are located on the second inner wall, and the stoppers 382 located on the first inner wall and the stoppers 382 located on the second inner wall are alternately arranged in sequence along the extension direction of the steam channel 381.

[0064] The stopper 382 located on the first inner wall and the stopper 382 located on the second inner wall are alternately arranged in sequence along the extension direction of the steam channel 381, so that the steam flow path P in the steam channel 381 is in a broken line shape, which accordingly increases the difficulty of the droplets passing through the steam channel, thereby reducing the probability of the droplets passing through the steam channel.

[0065] By arranging a plurality of stoppers 382 alternately on the first inner wall and the second inner wall relative to each other, a zigzag steam channel 381 is formed, which further reduces the probability of liquid droplets passing through the steam channel, thereby achieving effective stopping of the liquid droplets.

[0066] like Figure 2 As shown, according to some embodiments of the present application, the flash tank 34 includes an outer tank body 341, an inner tank body 342 and a first insulation layer 343. The inner tank body 342 is disposed in the outer tank body 341, and the first insulation layer 343 is disposed in the space between the outer tank body 341 and the inner tank body 342.

[0067] Inner tank 342 is the portion of flash tank 34 that holds the flashed liquid. Outer tank 341 is the shell surrounding inner tank 342. First insulation layer 343 is used to reduce the transfer of heat energy from the flashed liquid to the outside. First insulation layer 343 can be constructed of an insulating material or as a vacuum layer between inner tank 342 and outer tank 341.

[0068] By providing the first heat-insulating layer 343 in the flash tank 34 , the heat energy loss of the flashed liquid can be reduced as much as possible, thereby further improving the utilization rate of the heat energy after the flashed liquid flows back into the liquid storage container 21 .

[0069] like Figure 2 As shown, according to some embodiments of the present application, the steam supply system 100 further includes a liquid replenishing pipeline 70 , which is connected to the flash tank 34 for replenishing liquid into the flash tank 34 .

[0070] The heated liquid flashes in the flash tank 34 to form steam, which is then output. This means that the heated liquid is gradually consumed, and the flash tank 34 is replenished with liquid through the liquid replenishment line 70. The liquid then flows back into the liquid storage container 21, maintaining the total amount of liquid in the liquid storage container 21 and the flash tank 34 within an appropriate range to maintain the normal operation of the entire system. A liquid replenishment valve can be provided on the liquid replenishment line 70 to enable on-demand liquid replenishment.

[0071] By providing a liquid replenishing pipeline 70 to replenish a certain amount of liquid into the system, the consumption of the heated liquid during the flash evaporation process is compensated, thereby enabling the entire system to operate continuously and stably.

[0072] like Figure 1As shown, according to some embodiments of the present application, the heating unit 10 includes an evaporation part 11 and a first condensation part 12 connected to the evaporation part 11 through a pipeline for circulating a heat exchange medium. The evaporation part 11 is used to absorb external heat, and the first condensation part 12 is used to heat the liquid.

[0073] In some embodiments, the evaporation section 11 can be configured as an evaporation coil, and the first condensation section 12 can be configured as a condensation coil. The heating unit 10 further includes a compressor 13 and an expansion valve 14. The outlet of the evaporation coil is connected to the inlet of the condensation coil via the compressor 13, and the outlet of the condensation coil is connected to the inlet of the evaporation coil via the expansion valve 14. The compressor 13 compresses the heat exchange medium into a high-temperature, high-pressure liquid and inputs it into the condensation coil. The heat of the high-temperature, high-pressure heat exchange medium is transferred to the heated liquid to obtain a medium-temperature, high-pressure heat exchange medium. The medium-temperature, high-pressure heat exchange medium is converted to a low-temperature, low-pressure heat exchange medium under the action of the expansion valve 14. The low-temperature, low-pressure heat exchange medium flows into the evaporation section 11 to absorb external heat, thereby transferring low-grade external heat energy to the heat exchange medium, thereby reducing the energy consumption of the compressor 13 required to heat the heat exchange medium to a certain extent. The heat exchange medium is compressed by the compressor 13 and the above process is repeated.

[0074] The external heat may be waste heat from exhaust gas or waste water.

[0075] By providing the evaporation portion 11 to absorb external heat, the external heat is fully utilized to heat the heating liquid, thereby reducing the energy consumption required by the heating unit 10 for heating the heating liquid in the liquid storage container.

[0076] like Figure 1 As shown, according to some embodiments of the present application, the heating unit 10 is further configured to be connected to the steam supply line 40 to heat the steam in the steam supply line 40 .

[0077] The steam obtained after flash evaporation is output through the steam supply pipeline 40, and the heat exchange medium of the heating unit 10 exchanges heat with the steam in the steam supply pipeline 40, thereby transferring heat energy to the steam to further increase the temperature of the steam, thereby obtaining steam with a higher temperature, thereby meeting the demand for higher temperature steam.

[0078] In some embodiments, the temperature of the steam directly output from the steam supply line 40 is in the range of 105-230°C, and the temperature of the steam further heated by the heating unit 10 is in the range of 105-245°C.

[0079] The steam in the steam supply pipeline 40 is further heated by the heating unit 10 to obtain steam with a higher temperature to meet the demand for higher temperature steam.

[0080] like Figure 1As shown, according to some embodiments of the present application, the heating unit 10 further includes a second condensation portion 15 disposed in the steam supply pipeline 40 , and the second condensation portion 15 and the first condensation portion 12 are connected to the evaporation portion 11 pipeline in parallel.

[0081] In some embodiments, the evaporator section 11 can be configured as an evaporation coil, and the second condenser section 15 can be configured as a condensation coil. The evaporator section 11 is connected to the first condenser section 12 via a first circuit 16, and the evaporator section 11 is connected to the second condenser section 15 via a second circuit 17. A first electric valve 161 and a second check valve 162 are provided on the first circuit 16. The first electric valve 161 is used to control the flow of the first circuit 16, while the second check valve 162 is used to prevent the heat exchange medium after heat exchange in the second condenser section 15 from flowing to the first condenser section 12. A second electric valve 171 is provided on the second circuit 17. The second electric valve 171 is used to control the flow of the second circuit 17, thereby enabling the second condenser section 15 to be activated as needed based on the actual steam temperature required.

[0082] By setting the second condensation section 15 and the first condensation section 12 in parallel, the operations of the second condensation section 15 and the first condensation section 12 are independent of each other, thereby better completing the heating of the heating liquid in the liquid storage container 21 and the heating of the steam in the steam supply pipeline 40.

[0083] like Figure 4 As shown, Figure 4 Schematic diagram of the structure of a liquid storage container according to some embodiments of the present application. According to some embodiments of the present application, the liquid storage container 21 includes an outer body 211, an inner body 212, and a second insulation layer 213. The inner body 212 is disposed within the outer body 211, and the second insulation layer 213 is disposed in the space between the outer body 211 and the inner body 212.

[0084] The inner body 212 is the portion of the liquid storage container 21 that holds the heated liquid. The outer body 211 is the shell that surrounds the inner body 212. The second insulation layer 213 is used to reduce the transfer of heat energy from the heated liquid to the outside world, thereby reducing heat loss during the storage process. The second insulation layer 213 can be constructed of an insulating material or a vacuum layer between the inner body 212 and the outer body 211.

[0085] In some embodiments, along the height direction of the liquid storage container 21, the heated liquid is located in the lower half of the liquid storage container 21. The heated liquid can be high-temperature saturated water. The upper half of the liquid storage container 21 is a gas phase space. The bottom of the liquid storage container 21 is also provided with a second sewage outlet 214. Among them, the reflux port 215 on the liquid storage container 21, which is connected to the liquid outlet 33, is provided near the top of the liquid storage container 21.

[0086] By providing the second heat-insulating layer 213 in the liquid storage container 21 , the heat energy loss of the heated liquid can be reduced as much as possible, thereby further improving the utilization rate of the heat energy.

[0087] The following combination Figures 1 to 4 The embodiments of the present application are described in further detail.

[0088] The steam supply system 100 includes a heating unit 10 , a heat storage unit 20 , a flash unit 30 , a steam supply pipeline 40 , a liquid pump 50 , a first check valve 60 , and a liquid replenishing pipeline 70 .

[0089] The heating unit 10 is a heat pump comprising an evaporator 11, a first condenser 12, a second condenser 15, a compressor 13, and an expansion valve 14. The evaporator 11 is connected to the first condenser 12 via a first circuit 16, and to the second condenser 15 via a second circuit 17. The first and second condenser 12, 15 are connected in parallel. After absorbing heat in the evaporator 11, the heat exchange medium is compressed and heated by the compressor 13 and then supplied to the first and second condenser 12, 15, respectively. After releasing heat from the first and second condenser 12, 15, the heat exchange medium is decompressed and cooled by the expansion valve, thereby achieving a circulating heat exchange medium. A first electric valve 161 and a second check valve 162 are provided in the first circuit 16, and a second electric valve 171 is provided in the second circuit 17.

[0090] The heat storage unit 20 includes a liquid storage container 21, which includes an outer body 211, an inner body 212, and a second insulation layer 213 located between the outer body 211 and the inner body 212. The liquid storage container 21 is provided with a second drain port 214 and a return port 215. The first condenser 12 is located within the liquid storage container 21, which is used to store high-temperature saturated water.

[0091] The flash unit 30 includes a flash tank 34, a pressure reducing valve 35, a spray assembly 36, and a stopper assembly 38. The flash tank 34 comprises an outer tank body 341, an inner tank body 342, and a first insulation layer 343 located between the outer and inner tank bodies 341 and 342. The flash tank 34 is provided with a liquid inlet 31, a steam outlet 32, and a liquid outlet 33. The liquid storage container 21 is connected to the liquid inlet 31 via the pressure reducing valve 35. The steam outlet 32 ​​is connected to the steam supply line 40. The liquid outlet 33 is connected to the reflux port 215 via a liquid pump 50 and a first check valve 60. The spray assembly 36 and stopper assembly 38 are located within the flash tank 34, with the stopper assembly 38 located between the spray assembly 36 and the steam outlet 32. High-temperature saturated water flashes within the flash tank 34 to produce steam and low-temperature saturated water. The steam is discharged through the steam outlet 32, while the low-temperature saturated water is stored within the flash tank 34 and can flow back to the liquid storage container 21. The flash tank 34 is further provided with a first sewage outlet 37 , and the flash tank 34 is connected to the liquid replenishing pipeline 70 .

[0092] The stopper assembly 38 includes a steam passage 381 and a plurality of stoppers 382. Some stoppers 382 are located on the first inner wall of the steam passage 381, while others are located on the second inner wall. The stoppers 382 located on the first inner wall have a first end connected to the first inner wall and a second end bent toward the spray assembly 36, with a gap between them and the second inner wall. The stoppers 382 located on the second inner wall have a first end connected to the second inner wall and a second end bent toward the spray assembly 36, with a gap between them and the first inner wall.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A steam supply system, characterized in that: include: A heating unit, used for providing a heat exchange medium; a heat storage unit, comprising a liquid storage container for storing heated liquid after heat exchange with the heat exchange medium; A flash evaporation unit is used to receive and flash evaporate the heated liquid in the liquid storage container; the flash evaporation unit includes a liquid inlet, a steam outlet and a liquid outlet, the liquid inlet is connected to the liquid storage container pipeline for receiving the heated liquid, the steam outlet is used to be connected to the steam supply pipeline for providing steam to the outside, and the liquid outlet is connected to the liquid storage container pipeline for returning the flashed liquid obtained after flash evaporation to the liquid storage container.

2. The steam supply system according to claim 1, characterized in that The flash unit comprises: a flash tank, wherein the liquid inlet, the steam outlet, and the liquid outlet are respectively provided on the surface of the flash tank; a pressure reducing valve, disposed in the pipeline between the liquid inlet and the liquid storage container, the pressure reducing valve being used to adjust the evaporation pressure in the flash tank; A spray assembly is arranged in the flash tank and connected to the liquid inlet. The spray assembly is used to receive and spray the heated liquid to perform flash evaporation.

3. The steam supply system according to claim 2, characterized in that: The flash unit further includes: a stopper assembly disposed in the flash tank; Along the height direction of the flash tank, the stop assembly is located between the spray assembly and the steam outlet, and the stop assembly is used to stop liquid droplets.

4. The steam supply system according to claim 3, characterized in that: The stopper assembly includes a steam channel and a stopper disposed in the steam channel; The steam channel has a first inner wall and a second inner wall relative to each other, one end of the stopper is connected to one of the first inner wall and the second inner wall, the other end of the stopper is bent toward a side close to the spray assembly, and there is a gap between the other end of the stopper and the other of the first inner wall and the second inner wall.

5. The steam supply system according to claim 4, characterized in that: There are multiple stoppers, a portion of which are located on the first inner wall, and the rest of which are located on the second inner wall; the stoppers located on the first inner wall and the stoppers located on the second inner wall are alternately arranged in sequence along the extension direction of the steam channel.

6. The steam supply system according to claim 2, characterized in that: The flash tank comprises: Outer tank; an inner tank body, disposed within the outer tank body; and The first heat-insulating layer is arranged in the space between the outer tank body and the inner tank body.

7. The steam supply system according to claim 2, characterized in that: The steam supply system further comprises: A fluid replenishing pipeline is connected to the flash tank and is used for replenishing fluid into the flash tank.

8. The steam supply system according to any one of claims 1 to 7, characterized in that: The heating unit includes an evaporation portion and a first condensation portion connected to the evaporation portion via a pipeline for the heat exchange medium to flow; The evaporation part is used to absorb external heat, and the first condensation part is used to heat the heating liquid.

9. The steam supply system according to claim 8, characterized in that The heating unit is further configured to be connected to the steam supply pipeline to heat the steam in the steam supply pipeline.

10. The steam supply system according to claim 9, characterized in that The heating unit further includes a second condensation portion disposed in the steam supply pipeline, wherein the second condensation portion and the first condensation portion are connected to the evaporation portion pipeline in parallel.

11. The steam supply system according to any one of claims 1 to 7, characterized in that: The liquid storage container comprises: external body; an inner body disposed in the outer body; and The second heat-insulating layer is arranged in the space between the outer body and the inner body.

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