AHF recovery system and recovery method

Abstract

The invention relates to the technical field of nuclear industry gas treatment, and provides an AHF recovery system and a recovery method. The AHF recovery system comprises a condensing device and an AHF storage device; the condensing device is provided with an inlet and a first outlet; the AHF storage devices are provided with input ports and output ports, and first switch valves are arranged between the input ports of the AHF storage devices and the first discharge port of the condensing device. Therefore, the input port of one AHF storage device can be communicated with the condensing device by controlling the first switch valves, after one AHF storage device is full of AHF, the corresponding first switch valve is closed, and then the first switch valve corresponding to the other AHF storage device is opened, so that the liquid AHF discharged by the condensing device is stored in the other AHF storage device, and the liquid AHF is discharged by the condensing device. Therefore, by controlling opening and closing of the first switch valve, collection of AHF can be achieved, different storage devices can be replaced, continuous operation of the condensing device can be kept, and the AHF recovery efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of nuclear industry gas processing, and in particular to an AHF recovery system and a recovery method. Background Art

[0002] In the production of atomic energy industry or operation of nuclear facilities, exhaust gas containing nuclides of different properties is generated with different process engineering. Exhaust gas containing nuclides is generally radioactive, for example, AHF (Anhydrous Hydrogen Fluoride) gas in the nuclear industry. The recovery of radioactive AHF gas is generally condensed and separated from other gases.

[0003] At present, the method for separating and recovering radioactive AHF gas from other gases is mainly the liquid Diva flask condensation method, which is to place an AHF recovery container in a Diva flask, add liquid nitrogen to the Diva flask, and collect the mixed gas through heat exchange condensation through the container wall. However, in the existing method for separating and recovering AHF gas from other gases, when the AHF recovery container is full, the recovery needs to be suspended, the full recovery container is taken out of the Diva flask, and then a new recovery container is put into the Diva flask.

[0004] It can be seen that the AHF gas recovery process in the prior art cannot be operated continuously, which affects the recovery efficiency of the AHF gas. Summary of the invention

[0005] The present application provides an AHF recovery system and a recovery method to solve the technical problem in the prior art that the AHF gas recovery process cannot be operated continuously, thus affecting the recovery efficiency of the AHF gas.

[0006] In order to solve the above problems, the present application provides an AHF recovery system, the AHF recovery system comprising:

[0007] A condensing device having an inlet and a first outlet, wherein the inlet is used to input the AHF mixed gas, and the first outlet is used to discharge the liquid AHF;

[0008] The 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 switch 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 switch valve is disposed between the output port of each of the AHF storage devices and the inlet.

[0010] In some embodiments, the condensing device further comprises a second discharge outlet;

[0011] At least two condensing devices are provided, and 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 succeeding condensing device.

[0012] In some embodiments, along the flow direction of the AHF mixed gas, a third switch valve is provided between two adjacent condensing devices, between the second outlet of the preceding condensing device and the inlet of the succeeding condensing device.

[0013] In some embodiments, the first discharge ports of at least two of the condensing devices are both connected to the input port of the AHF storage device, and a fourth switch valve is disposed between the first discharge ports of two adjacent condensing devices.

[0014] In some embodiments, the condensing device comprises:

[0015] Box;

[0016] A heat exchange tube is arranged in the box body, and the heat exchange tube 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.

[0017] In some embodiments, the heat exchange tube 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.

[0018] In some embodiments, one end of the heat exchange tube forming the inlet, one end forming the first outlet, and one end forming the second outlet are all arranged through the side wall of the box body, and are connected to the flexible joint outside the box body, and the flexible joint is used to prevent the heat exchange tube from detaching from the side wall of the box body.

[0019] In some embodiments, the AHF storage device includes a storage tank and a pressure sensing portion, and the pressure sensing portion is disposed at the bottom of the storage tank.

[0020] The present application also provides an AHF recovery method, which is applied to any of the AHF recovery systems described above, and the AHF recovery method comprises:

[0021] Passing the AHF mixed gas into the condensing device from the inlet;

[0022] Opening the first switch valve and the second switch valve of the AHF storage device, and keeping the fourth switch valve between adjacent AHF storage devices closed, so that the AHF storage device collects the AHF condensed in the corresponding condensing device;

[0023] After one of the AHF storage devices is full, the first switch valve and the second switch valve corresponding to the AHF storage device are closed, and the fourth switch valve is opened. After the full AHF storage device is replaced with an empty AHF storage device, the first switch valve and the second switch valve of the empty AHF storage device are opened, and the fourth switch valve is closed;

[0024] Wherein, when the AHF storage device includes a storage tank and a pressure sensing part, when the pressure value sensed by the pressure sensing part reaches a preset value, the first switch valve and the second switch valve corresponding to the pressure sensing part are closed.

[0025] The beneficial effect of the embodiment of the present application is that the AHF recovery system provided by the present application includes a condensing device and an AHF storage device, the inlet of the condensing device is used to input the AHF mixed gas, and the first outlet is used to discharge the liquid AHF. By setting at least two AHF storage devices, the inlet of at least two AHF storage devices are connected to the first outlet, and a first switch valve is set between the inlet of each AHF storage device and the first outlet of the condensing device, so that after the AHF mixed gas is input into the condensing device, when the liquid AHF is collected, the first switch valve of one of the AHF storage devices can be opened first, and when the AHF storage device is full, the corresponding first switch valve is closed, and then the first switch valve corresponding to the other AHF storage device is opened, so that the liquid AHF discharged from the condensing device is stored in the other AHF storage device, so that the collection of AHF can be realized by controlling the opening and closing of the first switch valve to replace different storage devices, so that the condensing device can be kept in continuous operation and the AHF recovery efficiency can be improved.

[0026] By connecting the output port of the AHF storage device to the inlet port of the condensing device, and providing a second switch valve between the output port of each AHF storage device and the inlet port of the condensing device, after opening the second switch valve, the volatilized AHF gas in the AHF storage device can be re-input into the condensing device for condensation.

[0027] In addition, the heat exchange tube of the condensing device used in the AHF recovery system is arranged so that one end of the heat exchange tube forming an inlet, one end forming a first outlet and one end forming a second outlet all penetrate the side wall of the box body and are connected to the flexible joint on the outside of the box body. In this way, when the heat exchange tube leaks, the connection between the flexible joint and the heat exchange tube is removed, and the heat exchange tube can be removed from the condensing device, which facilitates the replacement and maintenance of the heat exchange tube and increases the service life of the condensing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0029] Figure 1 is a structural schematic diagram of an AHF recovery system provided in one embodiment of the present application;

[0030] Figure 2 is a structural schematic diagram of an AHF recovery system provided by another embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of a condensing device in an AHF recovery system provided in one embodiment of the present application;

[0032] Figure 4 It is a structural schematic diagram of the location of the heat exchange tubes of the condensing device in the AHF recovery system provided in one embodiment of the present application;

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of the heat exchange tube of the condensing device in the AHF recovery system provided in one embodiment of the present application;

[0034] Figure 6 It is a schematic diagram of the structure of the cooperation between the heat exchange tube and the box of the condensing device in the AHF recovery system provided in one embodiment of the present application.

[0035] In the figure: 100, AHF recovery system; 10, condensing device; 11, heat exchange tube; 111, inlet; 112, first outlet; 113, second outlet; 12, housing; 121, heat exchange chamber; 13, flexible joint; 20, AHF storage device; 21, storage tank; 211, input port; 212, output port; 22, pressure sensing unit; 31, first switch valve; 32, second switch valve; 33, third switch valve; 34, fourth switch valve. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0038] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] See also Figure 1 The present application provides an AHF recovery system, which can be used for the recovery of AHF in a mixed gas containing AHF (Anhydrous Hydrogen Fluoride) in the nuclear industry, but is not limited thereto. The AHF recovery system includes a condensing device 10 and an AHF storage device 20. The condensing device 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 device 20 has an input port 211 and an output port 212, at least two AHF storage devices 20 are provided, the input ports 211 of at least two AHF storage devices 20 are both connected to the first outlet 112, and a first switch valve 31 is provided between the input port 211 and the first outlet 112 of each AHF storage device 20.

[0040] When the AHF recovery system provided by the present application is used to recover the AHF in the AHF mixed gas, the first switch valve 31 of one of the at least two AHF storage devices 20 can be opened first, and the liquid AHF discharged from the first discharge port 112 of the condensing device 10 is collected by the 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 liquid AHF is collected by the other AHF storage device 20. It can be seen that the AHF recovery system provided by the present application can keep the condensing device 10 running continuously when replacing different AHF storage devices 20, improve the AHF recovery efficiency, and is simple to operate.

[0041] like Figure 1 As shown, an embodiment of the present application is described by taking two AHF storage devices 20 as an example, the input ports 211 of the two AHF storage devices 20 are both connected to the first discharge port 112 of the condensing device 10 through a pipeline, and a first switch valve 31 is provided on the pipeline between the input port 211 and the first discharge port 112, so that the opening and closing of the first switch valve 31 can control which AHF storage device 20 the liquid AHF discharged from the first discharge port 112 of the condensing device 10 flows to collect.

[0042] It should be noted that, during the process of collecting liquid AHF in the AHF storage device 20, a small amount of liquid AHF in the AHF storage device 20 will volatilize. In order to improve the AHF condensation efficiency, 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 switch 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-input into the condensing device 10 for condensation. It can be understood that in order to prevent the AHF mixed gas from entering the AHF storage device 20 when the AHF mixed gas is input into the condensing device 10, the second switch valve 32 can be opened when the AHF mixed gas is stopped from being input into the condensing device 10 to allow the AHF gas in the AHF storage device 20 to enter the condensing device 10. Of course, by providing the second switch valve 32 between the inlet port 111 of the condensing device 10 and the output port 212 of the AHF storage device 20, it can be effectively prevented that the AHF mixed gas enters the AHF storage device 20 when the AHF mixed gas is input into the condensing device 10.

[0043] The condensing device 10 may further include a second outlet 113. The condensing device 10 condenses the AHF gas in the input AHF mixed gas, and the obtained liquid AHF is discharged from the first outlet 112, and other gases are discharged from the second outlet 113. Figure 2 As shown, in some embodiments, at least two condensing devices 10 are also provided in the AHF recovery system. The condensing devices 10 in the AHF recovery system are connected in sequence, and along the flow direction of the AHF mixed gas, between two adjacent condensing devices 10, the second discharge port 113 of the previous condensing device 10 is connected to the inlet port 111 of the next condensing device 10. In this way, the previous condensing device 10 will continue to input the condensed gas to the next condensing device 10 for further condensation processing, effectively ensuring the recovery rate of the AHF gas in the AHF mixed gas.

[0044] like Figure 2 As shown, in some embodiments, a third switch valve 33 is provided between two adjacent condensing devices 10, between the second discharge port 113 of the previous condensing device 10 and the inlet port 111 of the next condensing device 10. By providing the third switch valve 33 between the second discharge port 113 of the previous condensing device 10 and the inlet port 111 of the next condensing device 10, when the AHF mixed gas enters the first condensing device 10 for condensation, the third switch valve 33 between it and the next condensing device 10 can be closed first, so that the AHF mixed gas is fully condensed in the first condensing device 10. Of course, in some embodiments, the third switch valve 33 can also be kept in an open state, so that multiple condensing devices 10 work at the same time, thereby improving the condensation recovery efficiency of AHF by the AHF recovery system 100. And the AHF recovery system 100 connects at least two condensing devices 10 in series, and the mixed gas containing AHF is condensed by at least two condensing devices 10, which effectively ensures that the AHF in the mixed gas is fully recovered.

[0045] When at least two condensing devices 10 are provided, such as Figure 2As shown, in some embodiments, the first outlets 112 of at least two condensing devices 10 are connected to the input port 211 of the AHF storage device 20, and a fourth switch valve 34 is provided between the first outlets 112 of two adjacent condensing devices 10. The fourth switch valve 34 can be provided at one end of the first switch valve 31 of the AHF storage device 20 close to the first outlet 112 of the condensing device 10. It can be understood that by making the first outlets 112 of all condensing devices 10 in the AHF recovery system connected to the input port 211 of the AHF storage device 20, the liquid AHF obtained by condensation can be collected in the AHF storage device 20. By providing a fourth switch valve 34 between the first discharge ports 112 of two adjacent condensing devices 10, in some embodiments, the number of condensing devices 10 in the AHF recovery system 100 can be made 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, when AHF collection begins, the first switch valve 31 and the second switch valve 32 corresponding to each AHF storage device 20 can be opened, and the fourth switch valve 34 between adjacent AHF storage devices 20 can be kept closed, thereby achieving simultaneous collection of multiple AHF storage devices 20 and improving collection efficiency. When the AHF storage device 20 connected to the first condensing device 10 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 between the AHF storage device 20 and the next AHF storage device 20 is opened, so that the AHF discharged from the first condensing device 10 is temporarily collected in the next AHF storage device 20. After the AHF storage device 20 corresponding to the first condensing device 10 is replaced with an empty one, the first switch valve 31 and the second switch valve 32 corresponding to the empty AHF storage device 20 are opened, and the fourth switch valve 34 between it and the next AHF storage device 20 is closed, thereby 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 similar, and will not be repeated here.

[0046] In the above embodiments of the present application, there is no limitation on the specific structures of the condensing device 10 and the AHF storage device 20. The condensing device 10 is used in the AHF recovery system to condense the AHF mixed gas by heat exchange with the AHF mixed gas inputted therein. The AHF storage device 20 is used in the AHF recovery system to store the liquid AHF condensed by the condensing device 10.

[0047] like Figure 3 and Figure 4As shown, in some embodiments, the condensing device 10 may include a housing 12 and a heat exchange tube 11. The heat exchange tube 11 is disposed in the housing 12, and the heat exchange tube 11 forms an inlet 111, a first outlet 112, and a second outlet 113 of the condensing device 10, and the first outlet 112 is located below the inlet 111 and the second outlet 113. Among them, the first outlet 112 is located below the inlet 111 and the second outlet 113, which is described by taking the placement state of the condensing device 10 during normal use as an example. The AHF mixed gas is input into the heat exchange tube 11 from the inlet 111, and after heat exchange, the condensed liquid AHF enters the AHF storage device 20 from the first outlet 112 at the bottom, and other gases in the AHF mixed gas are discharged from the second outlet 113 at the top or enter the next condensing device 10 to continue condensing. In order to ensure that the AHF mixed gas is fully heat exchanged in the heat exchange tube 11 of the condensing device 10, as Figure 4 and Figure 5 As shown, in some embodiments, the heat exchange tube 11 can be made into a cylindrical spiral structure, the inlet 111 and the second outlet 113 are located at one end of the cylindrical spiral structure, and the first outlet 112 is 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 box 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, in order to further increase the heat exchange area of ​​the heat exchange tube 11, fins can also be added to the heat exchange tube 11, but it is not limited to this.

[0048] The heat exchange tube 11 in the condensing device 10 may leak during long-term use. Figure 6 As shown, in some embodiments, the end of the heat exchange tube 11 forming the inlet 111, the end forming the outlet, and the end forming the second outlet 113 can all penetrate the side wall of the box body 12 and be connected to the flexible joint 13 outside the box body 12. The flexible joint 13 is used to prevent the heat exchange tube 11 from detaching from the side wall of the box body 12. For example, Figure 4 and Figure 6 As shown, the box body 12 can have a heat exchange cavity 121, and the heat exchange tube 11 is arranged in the heat exchange cavity 121. The three ends of the heat exchange tube 11 pass through the side wall of the box body 12 and are connected with the flexible joint 13. In this way, when the heat exchange tube 11 needs to be replaced, the three ends of the heat exchange tube 11 and the flexible joint 13 are separated, the heat exchange cavity 121 is opened, and the heat exchange tube 11 is taken out for maintenance and replacement, which is simple to operate.

[0049] like Figure 1 and Figure 2As shown, in some embodiments, the AHF storage device 20 may include a storage tank 21 and a pressure sensing unit 22, wherein the pressure sensing unit 22 is disposed at the bottom of the storage tank 21. The pressure sensing unit 22 is disposed at the bottom of the storage tank 21, so that the pressure of the storage tank 21 can be sensed, and it is convenient to judge whether the storage tank 21 is full according to the pressure value. For example, the pressure sensing unit 22 can be an electronic scale, but it is not limited thereto. Of course, in some embodiments, the AHF recovery system may also include a control device, and the pressure sensing unit 22 and the first switch valve 31 are both connected to the control device. When the pressure sensing unit 22 senses that the pressure value of the storage tank 21 reaches a preset value, the control device controls the first switch valve 31 corresponding to the pressure sensing unit 22 to close, and opens another first switch valve 31. It can be understood that the pressure value of the pressure sensing unit 22 corresponding to the other first switch valve 31 opened by the control device is the initial value. For example, the initial pressure value of the pressure sensing unit 22 may be the pressure value when the storage tank 21 is empty. Correspondingly, when the control device controls the first switch valve 31 to close, the preset value of the pressure sensing unit 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, and the weight of the AHF condensed by the corresponding condensing device 10 per unit time can be monitored, so as to determine whether there is an abnormality in the condensing efficiency of the condensing device 10. It should be noted that when the AHF recovery system also includes a second switch valve 32, a third switch valve 33 and a fourth switch valve 34, the second switch valve 32, the third switch valve 33 and the fourth switch valve 34 can also be connected to the control device. Among them, the first switch valve 31, the second switch valve 32, the third switch valve 33 and the fourth switch valve 34 in the AHF recovery system can all be solenoid valves, but are not limited to this.

[0050] It should be noted that, in some embodiments, the AHF storage device 20, each connecting pipe and the switch valve in the AHF recovery system 100 provided in the present application are provided with a cold insulation layer, which can prevent AHF evaporation, condensed water freezing and frostbite of personnel. In the embodiment of the present application, there is no restriction on the specific setting structure and material of the cold insulation layer. For example, the cold insulation layer can be polyurethane foam, foam glass, nitrile rubber, diene foam or expanded perlite and elastic felt. The cold insulation layer can be wrapped around the outer wall of the AHF storage device 20, each connecting pipe and the switch valve. In addition, it should be noted that a cold storage box can also be provided outside the AHF storage device 20. Regarding the specific insulation measures of the AHF storage device 20, it can be selected according to its working environment temperature, but it is not limited thereto.

[0051] In some embodiments, the present application further provides an AHF recovery method, which is applied to the AHF recovery system in the above embodiment having at least two AHF storage devices 20 and at least two condensing devices 10. Taking the example that each condensing device 10 in the AHF recovery system 100 is provided with an AHF storage device 20, the AHF recovery method includes:

[0052] Step S100 , introducing the AHF mixed gas into the condensing device 10 from the inlet 111 .

[0053] Taking the condensing device 10 including the box 12 and the heat exchange tube 11 as an example, the AHF mixed gas is passed into the condensing device 10 from the inlet 111, that is, the heat exchange tube 11 of the condensing device 10 is passed into the heat exchange tube 11 of the condensing device 10 from the inlet 111, and the AHF mixed gas exchanges heat with the low-temperature medium in the heat exchange chamber 121 of the heat exchange device. The low-temperature medium for heat exchange between the heat exchange chamber 121 and the heat exchange tube 11 can be low-temperature air, but is not limited to this. For example, the low-temperature medium for heat exchange can provide a working environment of about -83°C, but is not limited to this. The AHF gas in the AHF mixed gas is condensed to obtain liquid AHF and is discharged from the first discharge port 112 of the condensing device 10, and other gases are discharged from the second discharge port 113 of the condensing device 10. It should be noted that when the AHF recovery system includes at least two condensing devices 10, the other gases discharged from the second discharge port 113 enter the next condensing device 10 for further condensation, so as to ensure that the AHF gas in the AHF mixed gas is fully condensed and recovered. It can be understood that a third switch valve 33 is arranged between the second discharge outlet 113 of the current condensing device 10 and the inlet 111 of the subsequent condensing device 10. When other gases enter the inlet 111 of the subsequent condensing device 10 from the second discharge outlet 113, the third switch valve 33 between them needs to be opened first.

[0054] Step S200 , opening the first switch valve 31 and the second switch valve 32 corresponding to the AHF storage device 20 , and keeping the fourth switch valve 34 between adjacent AHF storage devices 20 closed, so that the AHF storage device 20 collects the AHF condensed in the corresponding condensing device 10 .

[0055] 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 one-to-one corresponding. In this way, when AHF begins to be collected, the first switch valve 31 and the second switch valve 32 corresponding to each AHF storage device 20 can be opened, and the fourth switch valve 34 between adjacent AHF storage devices 20 can be kept closed. The AHF discharged from each condensing device 10 is collected in the corresponding AHF storage device 20, and multiple condensing devices 10 can be operated at the same time, and multiple AHF storage devices 20 can be collected at the same time, thereby improving the collection efficiency.

[0056] 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 the full AHF storage device 20 is replaced 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.

[0057] It should be noted that when the AHF recovery system 100 is provided with at least two condensing devices 20, since between two adjacent condensing devices 10, the second discharge port 113 of the previous condensing device 10 is connected to the inlet port 111 of the subsequent condensing device 20, it can be understood that in 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 filled up first. When the AHF storage device 20 connected to the first condensing device 10 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 between the AHF storage device 20 and the next AHF storage device is opened, so that the AHF discharged from the first condensing device 10 is temporarily collected in the next AHF storage device 20. After the AHF storage device 20 corresponding to the first condensing device 10 is replaced with an empty one, the first switch valve 31 and the second switch valve 32 corresponding to the empty AHF storage device 20 are opened, and the fourth switch valve 34 between it and the next AHF storage device 20 is closed, thereby 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 similar, and will not be repeated here.

[0058] When the AHF storage device 20 includes a storage tank 21 and a pressure sensing unit 22, step S300 includes:

[0059] Step S301 : when the pressure value sensed by the pressure sensing part 22 reaches a preset value, the first switch valve 31 and the second switch valve 32 corresponding to the pressure sensing part 22 are closed.

[0060] The pressure sensing part 22 is disposed at the bottom of the storage tank 21, and can judge whether the storage tank 21 is full by sensing the weight of the storage tank 21. When the pressure value sensed by the pressure sensing part 22 reaches a preset value, the first switch valve 31 and the second switch valve 32 corresponding to the pressure sensing part 22 are closed, wherein the preset value is the pressure value of the pressure sensing part 22 when the storage tank 21 on the pressure sensing part 22 is full of liquid AHF. It can be understood that the first switch valve 31 corresponding to the pressure sensing part 22 is the first switch valve 31 corresponding to the storage tank 21 on the pressure sensing part 22.

[0061] 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 AHF weight of the condensation corresponding to the condensation device 10 per unit time, so as to determine whether the condensation efficiency of the condensation device 10 is abnormal.

[0062] The AHF recovery method provided in the present application adopts all the technical solutions of all the embodiments of the above-mentioned AHF recovery system 100, and therefore has at least all the beneficial effects brought by the technical solutions of the embodiments of the above-mentioned AHF recovery system 100, which will not be described one by one here.

[0063] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An AHF recovery system, characterized in that: The AHF recovery system includes: A condensing device having an inlet and a first outlet, wherein the inlet is used to input the AHF mixed gas, and the first outlet is used to discharge the liquid AHF; The 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 switch valve is provided between the input port of each AHF storage device and the first discharge port.

2. The AHF recovery system according to claim 1, characterized in that: The output ports of at least two of the AHF storage devices are communicated with the inlet, and a second switch valve is provided between the output port of each of the AHF storage devices and the inlet.

3. The AHF recovery system according to claim 2, characterized in that: The condensing device further comprises a second discharge outlet; At least two condensing devices are provided, and along the flow direction of the AHF mixed gas, between two adjacent condensing devices, the second outlet of the preceding condensing device is connected to the inlet of the succeeding condensing device.

4. The AHF recovery system according to claim 3, characterized in that: Between two adjacent condensing devices, a third switch valve is arranged between the second discharge port of the preceding condensing device and the inlet port of the succeeding condensing device.

5. The AHF recovery system according to claim 4, characterized in that: The first discharge ports of at least two of the condensing devices are communicated with the input port of the AHF storage device, and a fourth switch valve is arranged between the first discharge ports of two adjacent condensing devices.

6. The AHF recovery system according to claim 5, characterized in that: The condensing device comprises: Box; A heat exchange tube is arranged in the box body, and the heat exchange tube 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.

7. The AHF recovery system according to claim 6, characterized in that: The heat exchange tube 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.

8. The AHF recovery system according to claim 7, characterized in that: One end of the heat exchange tube forming the inlet, one end forming the first outlet and one end forming the second outlet are all arranged through the side wall of the box body and are connected to the flexible joint outside the box body. The flexible joint is used to prevent the heat exchange tube from detaching from the side wall of the box body.

9. The AHF recovery system according to claim 8, characterized in that: The AHF storage device includes a storage tank and a pressure sensing portion, and the pressure sensing portion is arranged at the bottom of the storage tank.

10. An AHF recovery method, characterized in that: Applicable to the AHF recovery system according to any one of claims 5 to 9, the AHF recovery method comprising: Passing the AHF mixed gas into the condensing device from the inlet; Opening the first switch valve and the second switch valve of the AHF storage device, and keeping the fourth switch valve between adjacent AHF storage devices closed, so that the AHF storage device collects the AHF condensed in the corresponding condensing device; After one of the AHF storage devices is full, the first switch valve and the second switch valve corresponding to the AHF storage device are closed, and the fourth switch valve is opened. After the full AHF storage device is replaced with an empty AHF storage device, the first switch valve and the second switch valve of the empty AHF storage device are opened, and the fourth switch valve is closed; Wherein, when the AHF storage device includes a storage tank and a pressure sensing part, when the pressure value sensed by the pressure sensing part reaches a preset value, the first switch valve and the second switch valve corresponding to the pressure sensing part are closed.

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