AHF recovery system
By designing an AHF recovery system and using switching valves to control the gas flow direction and storage device switching, the problem of the AHF gas recovery process being unable to operate continuously was solved, achieving a highly efficient AHF recovery effect.
Patent Information
- Application Number
- CN202520114643.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-17
AI Technical Summary
The existing AHF gas recovery process cannot operate continuously, which affects the recovery efficiency.
Design an AHF recovery system, including a condensation unit and at least two AHF storage units. By setting on/off valves to control the gas flow direction and switching of the storage units, the continuous operation of the condensation unit and efficient recovery can be achieved.
By controlling the opening and closing of the switching valve, the AHF storage device can be automatically switched, the condensation device can be kept running continuously, the AHF recovery efficiency can be improved, and the recovery rate can be increased through a multi-stage condensation device.
Smart Images
Figure CN223797159U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of nuclear industry gas processing technology, and in particular to an AHF recovery system. Background Technology
[0002] In the production of nuclear energy or the operation of nuclear facilities, different processes generate exhaust gases containing radionuclides. These exhaust gases are generally radioactive; for example, AHF (Anhydrous Hydrogen Fluoride) gas in the nuclear industry. The recovery of radioactive AHF gas typically involves condensation and separation from other gases.
[0003] Currently, the main method for separating and recovering radioactive AHF gas from other gases is the liquid Diva bottle condensation method. This method involves placing an AHF recovery container in a Diva bottle, adding liquid nitrogen, and collecting the mixed gas through heat exchange across the container wall. However, existing methods for separating and recovering AHF gas from other gases require pausing recovery when the AHF recovery container is full, removing the full container from the Diva bottle, and then placing a new container inside.
[0004] It is evident that the existing AHF gas recovery process cannot operate continuously, which affects the AHF gas recovery efficiency. Utility Model Content
[0005] This application provides an AHF recovery system to solve the technical problem that the AHF gas recovery process in the prior art cannot operate continuously, which affects the AHF gas recovery efficiency.
[0006] To address the above problems, this application provides an AHF recycling system, the AHF recycling system comprising:
[0007] A condensation device having an inlet and a first outlet, the inlet being used to input AHF mixed gas and the first outlet being used to discharge liquid AHF;
[0008] An AHF storage device has an input port and an output port. At least two AHF storage devices are provided. The input ports of at least two AHF storage devices are connected to the first discharge port, and a first switching valve is provided between the input port of each AHF storage device and the first discharge port.
[0009] In some embodiments, the output ports of at least two of the AHF storage devices are connected to the inlet, and a second switching valve is provided between the output port and the inlet of each of the AHF storage devices.
[0010] In some embodiments, the condensation device further includes a second outlet;
[0011] At least two condensing devices are provided. Between two adjacent condensing devices, along the flow direction of the AHF mixed gas, the second outlet of the preceding condensing device is connected to the inlet of the following condensing device.
[0012] In some embodiments, along the flow direction of the AHF mixed gas, a third switching valve is provided between two adjacent condensing devices, between the second outlet of the preceding condensing device and the inlet of the following condensing device.
[0013] In some embodiments, the first outlets of at least two of the condensing devices are connected to the inlet of the AHF storage device, and a fourth switching valve is provided between the first outlets of two adjacent condensing devices.
[0014] In some embodiments, the number of AHF storage devices is the same as the number of condensation devices, and each condensation device corresponds to one AHF storage device.
[0015] In some embodiments, the condensation device includes:
[0016] Box;
[0017] A heat exchange tube is disposed inside the housing, and the heat exchange tube forms the inlet, the first outlet and the second outlet of the condensation device, with the first outlet located below the inlet and the second outlet.
[0018] In some embodiments, the heat exchange tube has a cylindrical spiral structure, with the inlet and the second outlet located at one end of the cylindrical spiral structure and the first outlet located at the other end of the cylindrical spiral structure.
[0019] In some embodiments, the heat exchange tube is provided through the side wall of the housing at one end forming the inlet, one end forming the first outlet, and one end forming the second outlet, and is connected to a union joint on the outside of the housing. The union joint is used to prevent the heat exchange tube from detaching from the side wall of the housing.
[0020] In some embodiments, the AHF storage device includes a storage tank and a pressure sensor disposed at the bottom of the storage tank.
[0021] The beneficial effects of the embodiments of this application are as follows: The AHF recovery system provided by this application includes a condensation device and an AHF storage device. The inlet of the condensation device is used to input AHF mixed gas, and the first outlet is used to discharge liquid AHF. By setting at least two AHF storage devices, with the inlets of at least two AHF storage devices connected to the first outlet, and a first switching valve installed between the inlet of each AHF storage device and the first outlet of the condensation device, when the AHF mixed gas is input into the condensation device and the collection of liquid AHF begins, the first switching valve of one AHF storage device can be opened first. After that AHF storage device is full, its corresponding first switching valve is closed, and then the first switching valve of the other AHF storage device is opened, so that the liquid AHF discharged from the condensation device is stored in another AHF storage device. Thus, by controlling the opening and closing of the first switching valve, the collection of AHF can be achieved by changing different storage devices, which can keep the condensation device running continuously and improve the AHF recovery efficiency.
[0022] By connecting the output port of the AHF storage device to the inlet of the condenser, and by installing a second switching valve between the output port of each AHF storage device and the inlet of the condenser, the AHF gas volatilized in the AHF storage device can be re-introduced into the condenser for condensation after the second switching valve is opened.
[0023] Furthermore, the heat exchange tubes of the condenser used in the AHF recovery system are designed so that one end of the heat exchange tube forming the inlet, one end forming the first outlet, and one end forming the second outlet all penetrate the side wall of the housing and are connected to a union joint on the outside of the housing. In this way, when a leak occurs in the heat exchange tube, the heat exchange tube can be removed from the condenser by disconnecting the union joint from the heat exchange tube, which facilitates the replacement and maintenance of the heat exchange tube and improves the service life of the condenser. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:
[0025] Figure 1 This is a schematic diagram of the structure of an AHF recovery system provided in one embodiment of this application;
[0026] Figure 2 This is a schematic diagram of the structure of an AHF recovery system provided in another embodiment of this application;
[0027] Figure 3This is a three-dimensional structural schematic diagram of the condensation device in an AHF recovery system provided in an embodiment of this application;
[0028] Figure 4 This is a schematic diagram showing the location of the heat exchange tubes in the condenser of the AHF recovery system provided in one embodiment of this application.
[0029] Figure 5 This is a three-dimensional structural diagram of the heat exchange tube of the condenser in an AHF recovery system provided in an embodiment of this application;
[0030] Figure 6 This is a schematic diagram of the structure of the heat exchange tube and the housing of the condenser in an AHF recovery system provided in one embodiment of this application.
[0031] In the diagram: 100, AHF recovery system; 10, condenser; 11, heat exchange tube; 111, inlet; 112, first outlet; 113, second outlet; 12, housing; 121, heat exchange chamber; 13, union joint; 20, AHF storage device; 21, storage tank; 211, input port; 212, output port; 22, pressure sensor; 31, first switching valve; 32, second switching valve; 33, third switching valve; 34, fourth switching valve. Detailed Implementation
[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, not all structures. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0033] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0035] Please see Figure 1 This application provides an AHF recovery system that can be used in the nuclear industry to recover AHF (Anhydrous Hydrogen Fluoride) from mixed gases containing AHF, but is not limited thereto. The AHF recovery system includes a condensation unit 10 and an AHF storage unit 20. The condensation unit 10 has an inlet 111 and a first outlet 112. The inlet 111 is used to input the AHF mixed gas, and the first outlet 112 is used to discharge liquid AHF. The AHF storage unit 20 has an inlet 211 and an outlet 212. At least two AHF storage units 20 are provided, and the inlets 211 of at least two AHF storage units 20 are connected to the first outlet 112. A first switching valve 31 is provided between the inlet 211 and the first outlet 112 of each AHF storage unit 20.
[0036] When using the AHF recovery system provided in this application to recover AHF from an AHF mixture, the first switch valve 31 of one of at least two AHF storage devices 20 can be opened first. The liquid AHF discharged from the first outlet 112 of the condenser 10 is collected by this AHF storage device 20. After one AHF storage device 20 is full, the first switch valve 31 of the other AHF storage device 20 is opened, and the other AHF storage device 20 is used for collection. Therefore, the AHF recovery system provided in this application can maintain continuous operation of the condenser 10 when different AHF storage devices 20 are replaced, improving AHF recovery efficiency, and is simple to operate.
[0037] like Figure 1 As shown, in one embodiment of this application, two AHF storage devices 20 are provided as an example. The inlet 211 of both AHF storage devices 20 are connected to the first outlet 112 of the condensing device 10 through a pipeline. A first switching valve 31 is provided on the pipeline between the inlet 211 and the first outlet 112. Thus, the opening and closing of the first switching valve 31 can control which AHF storage device 20 the liquid AHF discharged from the first outlet 112 of the condensing device 10 flows to for collection.
[0038] It should be noted that during the collection of liquid AHF in the AHF storage device 20, a small amount of liquid AHF will evaporate. To improve the AHF condensation efficiency, such as... Figure 1 As shown, in some embodiments, the output ports 212 of at least two AHF storage devices 20 are connected to the inlet port 111 of the condensing device 10, and a second switching valve 32 is provided between the output port 212 and the inlet port 111 of each AHF storage device 20. In this embodiment, by connecting the output port 212 of the AHF storage device 20 to the inlet port 111 of the condensing device 10, the AHF gas volatilized in the AHF storage device 20 can be re-introduced into the condensing device 10 for condensation. It can be understood that, to prevent the AHF mixture from entering the AHF storage device 20 when the AHF mixture is introduced into the condensing device 10, the second switching valve 32 can be opened when the AHF mixture is stopped from being introduced into the condensing device 10, allowing the AHF gas in the AHF storage device 20 to enter the condensing device 10. Of course, by providing the second switching valve 32 between the inlet port 111 of the condensing device 10 and the output port 212 of the AHF storage device 20, the entry of the AHF mixture into the AHF storage device 20 when the AHF mixture is introduced into the condensing device 10 can be effectively prevented.
[0039] The condensing device 10 may further include a second outlet 113. The condensing device 10 condenses the AHF gas in the input AHF mixture, and the resulting liquid AHF is discharged through the first outlet 112, while other gases are discharged through the second outlet 113. For example... Figure 2 As shown, in some embodiments, at least two condensing devices 10 are provided in the AHF recovery system. The condensing devices 10 in the AHF recovery system are connected sequentially. Along the flow direction of the AHF mixed gas, the second outlet 113 of the preceding condensing device 10 is connected to the inlet 111 of the following condensing device 10. In this way, the condensed gas from the preceding condensing device 10 continues to be fed into the next condensing device 10 for further condensation, effectively ensuring the recovery rate of AHF gas in the AHF mixed gas.
[0040] like Figure 2 As shown, in some embodiments, a third switching valve 33 is provided between two adjacent condensing devices 10, between the second outlet 113 of the preceding condensing device 10 and the inlet 111 of the following condensing device 10. By providing the third switching valve 33 between the second outlet 113 of the preceding condensing device 10 and the inlet 111 of the following condensing device 10, when the AHF mixture enters the first condensing device 10 for condensation, the third switching valve 33 between it and the following condensing device 10 can be closed first, allowing the AHF mixture to be fully condensed in the first condensing device 10. Of course, in some embodiments, the third switching valve 33 can also be kept open, allowing multiple condensing devices 10 to operate simultaneously, improving the condensation and recovery efficiency of the AHF recovery system 100 for AHF. Furthermore, by connecting at least two condensing devices 10 in series, the AHF-containing mixture passes through at least two condensing devices 10 for condensation, effectively ensuring that the AHF in the mixture is fully recovered.
[0041] When at least two condensing devices 10 are also provided, such as Figure 2As shown, in some embodiments, the first outlets 112 of at least two condensing devices 10 are connected to the inlet 211 of the AHF storage device 20, and a fourth switching valve 34 is provided between the first outlets 112 of two adjacent condensing devices 10. The fourth switching valve 34 may be located at the end of the first switching valve 31 of the AHF storage device 20 near the first outlet 112 of the condensing device 10. It can be understood that by connecting the first outlets 112 of all condensing devices 10 in the AHF recovery system to the inlet 211 of the AHF storage device 20, the condensed liquid AHF can be collected in the AHF storage device 20. By providing a fourth switching valve 34 between the first outlet 112 of two adjacent condensing devices 10, in some embodiments, the number of condensing devices 10 in the AHF recovery system 100 can be the same as the number of AHF storage devices 20, that is, one condensing device 10 corresponds to one AHF storage device 20. In this way, during the AHF collection process, the first switching valve 31 and the second switching valve 32 corresponding to each AHF storage device 20 can be in the open state, while the fourth switching valve 34 between adjacent AHF storage devices 20 is kept closed, so as to achieve simultaneous collection of multiple AHF storage devices 20 and improve collection efficiency. When the AHF storage device 20 connected to the first condenser 10 is full, the first and second switching valves 31 and 32 corresponding to that AHF storage device 20 are closed, and the fourth switching valve 34 between that AHF storage device 20 and the next AHF storage device 20 is opened, so that the AHF discharged from the first condenser 10 is temporarily collected into the next AHF storage device 20. After the AHF storage device 20 corresponding to the first condenser 10 is replaced with an empty one, the first and second switching valves 31 and 32 corresponding to the empty AHF storage device 20 are opened, and the fourth switching valve 34 between it and the next AHF storage device 20 is closed, thus completing the replacement of the AHF storage device 20. It can be understood that the replacement operation of other AHF storage devices 20 in the AHF recovery system 100 after they are full is the same, and will not be described in detail here.
[0042] In the above embodiments of this application, the specific structures of the condensing device 10 and the AHF storage device 20 are not limited. The condensing device 10, in the AHF recovery system, is used to condense the AHF mixed gas through heat exchange with the input internal AHF mixed gas. The AHF storage device 20, in the AHF recovery system, is used to store the liquid AHF condensed by the condensing device 10.
[0043] like Figure 3 and Figure 4As shown, in some embodiments, the condensing device 10 may include a housing 12 and heat exchange tubes 11. The heat exchange tubes 11 are disposed within the housing 12, forming an inlet 111, a first outlet 112, and a second outlet 113 of the condensing device 10, with the first outlet 112 located below the inlet 111 and the second outlet 113. The first outlet 112 being located below the inlet 111 and the second outlet 113 is illustrated using the condensing device 10 in its normal operating state as an example. The AHF mixture enters the heat exchange tubes 11 through the inlet 111. After heat exchange, the condensed liquid AHF enters the AHF storage device 20 through the lower first outlet 112. Other gases in the AHF mixture are discharged through the upper second outlet 113 or enter the next condensing device 10 for further condensation. To ensure sufficient heat exchange in the heat exchange tubes 11 of the condensing device 10, such as... Figure 4 and Figure 5 As shown, in some embodiments, the heat exchange tube 11 can be in the form of a cylindrical spiral structure, with the inlet 111 and the second outlet 113 located at one end of the cylindrical spiral structure, and the first outlet 112 located at the other end of the cylindrical spiral structure. It can be understood that when the heat exchange tube 11 is installed in the housing 12, the end of the heat exchange tube 11 forming the inlet 111 and the second outlet 113 is located at the top. Of course, to further increase the heat exchange area of the heat exchange tube 11, fins can be added to the heat exchange tube 11, but this is not a limitation.
[0044] The heat exchange tube 11 in the condenser 10 may leak during long-term use, such as... Figure 6 As shown, in some embodiments, the heat exchange tube 11 can be configured such that one end forming the inlet 111, one end forming the outlet, and one end forming the second outlet 113 all penetrate the side wall of the housing 12 and are connected to a union joint 13 on the outside of the housing 12. The union joint 13 is used to prevent the heat exchange tube 11 from detaching from the side wall of the housing 12. For example, as Figure 4 and Figure 6 As shown, the housing 12 may have a heat exchange chamber 121, and the heat exchange tube 11 is disposed in the heat exchange chamber 121. The three ends of the heat exchange tube 11 pass through the side wall of the housing 12 and are connected to the union joint 13. In this way, when the heat exchange tube 11 needs to be replaced, the three ends of the heat exchange tube 11 are separated from the union joint 13, the heat exchange chamber 121 is opened, and the heat exchange tube 11 can be taken out for maintenance and replacement. The operation is simple.
[0045] like Figure 1 and Figure 2As shown, in some embodiments, the AHF storage device 20 may include a storage tank 21 and a pressure sensor 22, wherein the pressure sensor 22 is disposed at the bottom of the storage tank 21. The pressure sensor 22, disposed at the bottom of the storage tank 21, can sense the pressure of the storage tank 21, facilitating the determination of whether the storage tank 21 is full based on the pressure value. For example, the pressure sensor 22 can be an electronic scale, but is not limited thereto. Of course, in some embodiments, the AHF recycling system may also include a control device, with both the pressure sensor 22 and the first switching valve 31 connected to the control device. When the pressure sensor 22 senses that the pressure value of the storage tank 21 has reached a preset value, the control device controls the first switching valve 31 corresponding to the pressure sensor 22 to close and opens another first switching valve 31. It can be understood that the pressure value of the pressure sensor 22 corresponding to the other first switching valve 31 opened by the control device is an initial value. For example, the initial pressure value of the pressure sensor 22 can be the pressure value when the storage tank 21 is empty. Correspondingly, when the control device controls the first switching valve 31 to close, the preset value of the pressure sensor 22 is the pressure value when the storage tank 21 is full. Of course, during the operation of the AHF recovery system 100, the weight of the AHF storage device 20 can also be sensed by the pressure sensing unit 22, which can monitor the weight of AHF condensed by the condensing device 10 per unit time, thereby determining whether there is any abnormality in the condensing efficiency of the condensing device 10. It should be noted that when the AHF recovery system also includes a second switching valve 32, a third switching valve 33, and a fourth switching valve 34, these valves can all be connected to the control device. The first switching valve 31, the second switching valve 32, the third switching valve 33, and the fourth switching valve 34 in the AHF recovery system can all be solenoid valves, but are not limited to this.
[0046] It should be noted that in some embodiments, the AHF storage device 20, each connecting pipe, and the switching valves in the AHF recovery system 100 provided in this application are all equipped with a cold insulation layer to prevent AHF evaporation, condensate freezing, and frostbite to personnel. The specific structure and materials of the cold insulation layer are not limited in the embodiments of this application. For example, the cold insulation layer can be polyurethane foam, foam glass, nitrile rubber, diene foam, expanded perlite, or elastic felt, etc. The cold insulation layer can wrap around the outer wall of the AHF storage device 20, each connecting pipe, and the switching valves. Furthermore, it should be noted that a cold insulation box can also be installed outside the AHF storage device 20. The specific insulation measures for the AHF storage device 20 can be selected according to its operating environment temperature, but are not limited thereto.
[0047] An AHF recovery system 100 is configured with at least two AHF storage devices 20 and at least two condensing devices 10, and each condensing device 10 corresponds to one AHF storage device 20. The method for AHF recovery may include:
[0048] Step S100: The AHF mixed gas is introduced into the condenser 10 through the inlet 111.
[0049] Taking the condenser 10, which includes a housing 12 and heat exchange tubes 11, as an example, the AHF mixed gas enters the condenser 10 through inlet 111, i.e., through the heat exchange tubes 11 of the condenser 10. The AHF mixed gas exchanges heat with a cryogenic medium in the heat exchange chamber 121 of the heat exchanger. The cryogenic medium exchanging heat between the heat exchange chamber 121 and the heat exchange tubes 11 can be cryogenic air, but is not limited to this. For example, the cryogenic medium can provide an operating environment of approximately -83°C, but is not limited to this. The AHF gas in the AHF mixed gas condenses to obtain liquid AHF, which is discharged from the first outlet 112 of the condenser 10. Other gases are discharged from the second outlet 113 of the condenser 10. It should be noted that when the AHF recovery system includes at least two condenser 10s, other gases discharged from the second outlet 113 enter the next condenser 10 for further condensation, ensuring that the AHF gas in the AHF mixed gas is fully condensed and recovered. It is understood that a third switching valve 33 is provided between the second outlet 113 of the current condensing device 10 and the inlet 111 of the next condensing device 10. When other gases enter the inlet 111 of the next condensing device 10 from the second outlet 113, the third switching valve 33 between them needs to be opened first.
[0050] In step S200, the first switch valve 31 and the second switch valve 32 corresponding to the AHF storage device 20 are opened, while the fourth switch valve 34 between adjacent AHF storage devices 20 is kept closed, so that the AHF storage device 20 collects the AHF condensed in the corresponding condensation device 10.
[0051] When the AHF recovery system 100 includes at least two AHF storage devices 20 and at least two condensing devices 10, the number of condensing devices 10 and AHF storage devices 20 in the AHF recovery system 100 can be the same and correspond one-to-one. Thus, during the AHF collection process, the first switching valve 31 and the second switching valve 32 corresponding to each AHF storage device 20 can be in the open state, while the fourth switching valve 34 between adjacent AHF storage devices 20 remains closed. The AHF discharged from each condensing device 10 is collected into the corresponding AHF storage device 20, enabling multiple condensing devices 10 to operate simultaneously and multiple AHF storage devices 20 to collect simultaneously, thereby improving collection efficiency.
[0052] In step S300, after an AHF storage device 20 is full, the first switch valve 31 and the second switch valve 32 corresponding to the AHF storage device 20 are closed, and the fourth switch valve 34 is opened. After replacing the full AHF storage device 20 with an empty AHF storage device 20, the first switch valve 31 and the second switch valve 32 of the empty AHF storage device 20 are opened, and the fourth switch valve 34 is closed.
[0053] It should be noted that when the AHF recovery system 100 is equipped with at least two condensing devices 20, since the second outlet 113 of the first condensing device 10 is connected to the inlet 111 of the second condensing device 20, it can be understood that during the AHF recovery process, the first condensing device 10 generally collects the most AHF, that is, the AHF storage device 20 corresponding to the first condensing device 10 is generally full first. When the AHF storage device 20 connected to the first condenser 10 is full, the first and second switching valves 31 and 32 corresponding to that AHF storage device 20 are closed, and the fourth switching valve 34 between that AHF storage device 20 and the next AHF storage device is opened, so that the AHF discharged from the first condenser 10 is temporarily collected into the next AHF storage device 20. After the AHF storage device 20 corresponding to the first condenser 10 is replaced with an empty one, the first and second switching valves 31 and 32 corresponding to the empty AHF storage device 20 are opened, and the fourth switching valve 34 between it and the next AHF storage device 20 is closed, thus completing the replacement of the AHF storage device 20. It can be understood that the replacement operation of other AHF storage devices 20 in the AHF recovery system 100 after they are full is the same, and will not be described in detail here.
[0054] Wherein, when the AHF storage device 20 includes a storage tank 21 and a pressure sensing unit 22, step S300 includes:
[0055] Step S301: When the pressure value sensed by the pressure sensing unit 22 reaches the preset value, the first switch valve 31 and the second switch valve 32 corresponding to the pressure sensing unit 22 are closed.
[0056] A pressure sensor 22 is located at the bottom of the storage tank 21 and can determine whether the storage tank 21 is full by sensing its weight. When the pressure value sensed by the pressure sensor 22 reaches a preset value, the first switch valve 31 and the second switch valve 32 corresponding to the pressure sensor 22 are closed. The preset value is the pressure value of the pressure sensor 22 when the storage tank 21 is full of liquid AHF. It can be understood that the first switch valve 31 corresponding to the pressure sensor 22 is the same as the first switch valve 31 corresponding to the storage tank 21.
[0057] It should be noted that by setting a pressure sensing unit 22 at the bottom of the storage tank 21, the pressure sensing unit 22 can also monitor the weight of AHF condensed by the condensing device 10 per unit time, thereby determining whether the condensing efficiency of the condensing device 10 is abnormal.
[0058] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. An AHF recovery system characterized by, The AHF recovery system comprises: a condensing device having an inlet for inputting AHF mixed gas and a first outlet for discharging liquid AHF; AHF storage devices each having an inlet and an outlet, and at least two of the AHF storage devices are provided, the inlets of the at least two AHF storage devices are communicated with the first outlet, and a first switch valve is arranged between the inlet of each of the AHF storage devices and the first outlet.
2. The AHF recovery system of claim 1, wherein, The outlets of the at least two AHF storage devices are communicated with the inlet, and a second switch valve is arranged between the outlet of each of the AHF storage devices and the inlet.
3. The AHF recovery system of claim 2, wherein, The condensing device further comprises a second outlet; The condensing device is provided with at least two condensing devices, and along the flow direction of the AHF mixed gas, the second outlet of a former condensing device is connected to the inlet of a latter condensing device between adjacent two condensing devices.
4. The AHF recovery system of claim 3, wherein, A third switch valve is arranged between the second outlet of a former condensing device and the inlet of a latter condensing device between adjacent two condensing devices.
5. The AHF recovery system of claim 4, wherein, The first outlets of the at least two condensing devices are communicated with the inlets of the AHF storage devices, and a fourth switch valve is arranged between the first outlets of adjacent two condensing devices.
6. The AHF recovery system of claim 5, wherein, The number of the AHF storage devices is the same as the number of the condensing devices, and each of the condensing devices corresponds to one AHF storage device.
7. The AHF recovery system of claim 3, wherein, The condensing device comprises: a box body; a heat exchange pipe arranged in the box body, the heat exchange pipe forms the inlet, the first outlet and the second outlet of the condensing device, and the first outlet is located below the inlet and the second outlet.
8. The AHF recovery system of claim 7, wherein, The heat exchange pipe is in a cylindrical spiral structure, the inlet and the second outlet are located at one end of the cylindrical spiral structure, and the first outlet is located at the other end of the cylindrical spiral structure.
9. The AHF recovery system of claim 8, wherein, The end forming the inlet, the end forming the first outlet and the end forming the second outlet of the heat exchange pipe are all arranged through the side wall of the box body and connected with a union joint outside the box body, and the union joint is used to avoid the heat exchange pipe from being separated from the side wall of the box body.
10. The AHF recovery system of any one of claims 1-9, wherein, The AHF storage device comprises a storage tank and a pressure sensing part arranged at the bottom of the storage tank.