Krypton-xenon fine extraction device

Abstract

This application relates to the technical field of krypton-xenon fine extraction, in particular to a krypton-xenon fine extraction device, which mainly includes a tray assembly. The tray assembly includes trays, overflow weirs and downcomers. The trays are horizontally installed on the inner wall of the tower body. A plurality of sieve holes are provided on the trays. There are two overflow weirs, which are relatively arranged on the upper end surface of the trays. The downcomers are vertically installed on the lower end surface of the trays. The downcomers are located outside the two overflow weirs. An annular pipe is provided on the lower end surface of the trays. The annular pipe is vertically arranged and communicated with a plurality of sieve holes. An arc-shaped flow guiding groove is formed on the inner wall of the annular pipe. The flow guiding groove is arranged around the axis direction of the annular pipe. A flow guiding block is arranged in the annular pipe. The surface of the flow guiding block facing the flow guiding groove is an arc surface. A connecting piece is arranged between the flow guiding block and the groove wall of the flow guiding groove. This application has the effect of reducing the manufacturing cost of the equipment while ensuring relatively good separation effect and efficiency of the rectification column as much as possible.

Description

Technical Field

[0001] The present application relates to the technical field of krypton-xenon fine extraction, and in particular to a krypton-xenon fine extraction device. Background Art

[0002] A krypton-xenon fine extraction device is a device that separates krypton and xenon using the fractional distillation principle. Among them, the rectification column (also known as the separation column) is the most critical part. Inside the rectification column, the gas is divided into different components through fillers or trays, and then different gases are separated according to the physical properties (such as boiling point, freezing point, diffusion rate, etc.) of gas molecules under different conditions.

[0003] Currently, the rectification column mainly consists of a feed inlet, a column body, trays, a condenser, a discharge outlet, etc. The working principle of the rectification column is to introduce the mixed gas from the feed inlet of the column body, and through the action of multiple trays, the gas is separated into different components, and then collected separately from different discharge outlets. The role of the trays is to increase the contact area between the gas and the liquid and promote energy transfer. Generally speaking, the lower the boiling point of gas molecules, the better the separation effect in the rectification column. Therefore, for a krypton-xenon fine extraction device, the rectification column usually adopts a low-temperature cooling method to liquefy high-boiling-point gases such as oxygen and nitrogen in the gas mixture, while krypton and xenon remain gaseous, so as to achieve the purpose of krypton-xenon separation.

[0004] However, in the rectification column, the gas is transferred and mixed between different trays, and during the transfer and mixing process, the gas will interact with each other, such as adsorption, reaction, etc. These interactions will affect the separation efficiency of the gas. Increasing the height and the number of trays of the rectification column can increase the contact time and contact times of the gas in the rectification column, thereby increasing the interaction between the gases and improving the separation efficiency and gas purity. However, it will also increase the volume of the equipment and greatly increase the manufacturing cost of the equipment. Summary of the Invention

[0005] In order to reduce the manufacturing cost of the equipment while ensuring relatively good separation effect and efficiency of the rectification column as much as possible, the present application provides a krypton-xenon fine extraction device.

[0006] The krypton-xenon fine extraction device provided by the present application adopts the following technical solutions:

[0007] A krypton-xenon fine extraction device, comprising:

[0008] A column body, a liquid inlet hole is opened on the side wall of the column body, a liquid outlet hole is opened on the lower end surface of the column body, and a gas outlet hole is opened on the upper end surface of the column body;

[0009] A condensing device, the condensing device is communicated with the air outlet through an air outlet pipe, a reflux pipe is connected to the condensing device, the reflux pipe is communicated with the condensing device, one end of the reflux pipe is communicated with the upper part of the tower body, and the other end of the reflux pipe is connected to the light component collecting device bucket;

[0010] A reboiling device, the reboiling device is communicated with the liquid outlet through a liquid outlet pipe, a gas guide pipe is connected to the reboiling device, one end of the gas guide pipe is communicated with the reboiling device, one end of the gas guide pipe is communicated with the lower part of the tower body, and the reboiling device is communicated with the heavy component collecting device through a conduit;

[0011] A tray assembly, the tray assembly includes a tray, an overflow weir and a downcomer. The tray is horizontally installed on the inner wall of the tower body. A plurality of sieve holes are opened on the tray. There are two overflow weirs, which are oppositely arranged on the upper end surface of the tray. The downcomer is vertically installed on the lower end surface of the tray. The downcomer is located outside the two overflow weirs. A ring pipe is arranged on the lower end surface of the tray. The ring pipe is vertically arranged and communicated with a plurality of the sieve holes. An arc-shaped diversion groove is opened on the inner wall of the ring pipe. The diversion groove is arranged around the axis direction of the ring pipe. A diversion block is arranged in the ring pipe. The diversion block is adapted to the diversion groove. The surface of the diversion block facing the diversion groove is an arc surface. The diversion block is a ring block and is coaxially arranged with the ring pipe. A connecting piece is arranged between the diversion block and the groove wall of the diversion groove. The connecting piece is used to fix the diversion block in the ring pipe.

[0012] By adopting the above technical solutions, when the equipment is started, the mixed gas at the bottom of the tower body will rise to the upper part of the tower body. When the mixed gas flows into the ring pipe, a part of the mixed gas entering the ring pipe will flow through the middle part of the ring pipe, while the other part will enter the diversion groove and then enter the middle part of the ring pipe. Because the diversion groove is arc-shaped, the flow direction of the mixed gas coming out of the diversion groove forms a certain angle with the flow direction of the mixed gas in the middle part of the ring pipe. Therefore, the mixed gas in the two paths will collide. The collision of the mixed gas will slow down the flow rate of the mixed gas, so that the flow time of the mixed gas in the tower body increases, and the interaction time between various gases is longer, thereby improving the efficiency and effect of gas separation. At the same time, due to the collision of the gases, the interaction intensity between various gases will also increase, further improving the efficiency and effect of gas separation. In addition, this structure does not increase the volume of the equipment, and its manufacturing cost is not increased, so as to ensure that the rectifying tower has relatively good separation effect and efficiency as a whole, while reducing the manufacturing cost of the equipment.

[0013] Optionally, a plurality of guide grooves are provided along the axial direction of the annular tube, a plurality of guide blocks are provided along the axial direction of the annular tube, and the plurality of guide blocks correspond one-to-one to the plurality of guide grooves, and a plurality of connecting members are provided, and the plurality of connecting members correspond one-to-one to the guide blocks.

[0014] By adopting the above technical solution, the flow velocity of the gas can be further reduced, and the number of gas collisions can be increased, thereby further enhancing the effect of the interaction between various gases, and further improving the efficiency and effect of gas separation.

[0015] Optionally, a plurality of the guide grooves are evenly spaced apart along the axis direction of the annular tube, and a plurality of the guide blocks are evenly spaced apart along the axis direction of the annular tube.

[0016] By adopting the above technical scheme, on the one hand, the evenly spaced distribution of the guide grooves and the guide blocks can slow down the flow of the gas relatively stably but gradually, thereby avoiding as much as possible the situation where the mixed gas has a huge impact on a certain part of the inner wall of the annular tube, thereby reducing the probability of damage to the annular tube; on the other hand, the evenly spaced layout of the guide grooves can make the overall mass distribution of the annular tube relatively uniform, thereby improving the self-load strength of the annular tube, thereby further reducing the probability of damage to the annular tube.

[0017] Optionally, the connecting member includes a connecting block, and a plurality of the connecting blocks are provided, a guide hole is formed between two adjacent connecting blocks, one end of the connecting block is fixedly connected to the groove wall of the guide groove, and one end of the connecting block is fixedly connected to the guide block.

[0018] By adopting the above technical solution, the connection between the guide block and the annular pipe is achieved, and at the same time, it is ensured that the mixed gas can flow smoothly from the guide groove.

[0019] Optionally, a plurality of the connecting blocks are evenly spaced around the annular tube axis.

[0020] By adopting the above technical solution, the load borne on each connecting block is relatively uniform, thereby avoiding the connection block from breaking due to excessive load as much as possible, thereby improving the connection strength between the guide block and the annular pipe.

[0021] Optionally, the opposing surfaces of two adjacent connecting blocks are both inclined surfaces inclined in a direction away from each other.

[0022] By adopting the above technical solution, the aperture of the diversion hole relatively close to the bottom of the tower body is smaller than the aperture relatively far from the bottom of the tower body. Therefore, when the mixed gas flows through the diversion hole, the mixed gas moves from a relatively small space to a relatively large space, so that the pressure of the mixed gas decreases, and its flow velocity will further slow down. As a result, the flow time of the mixed gas in the tower body is further increased, and the interaction time between the mixed gases is longer, thus further improving the separation efficiency and effect of the mixed gases.

[0023] Optionally, a flow retarder is provided on the upper end surface of the tray, and the flow retarder is used to slow down the flow rate of the mixed liquid on the tray.

[0024] By adopting the above technical solution, the flow velocity of the mixed liquid on the tray becomes slower, so that the contact time between the mixed gas and the mixed liquid is longer, enhancing the heat exchange effect between the mixed gas and the mixed liquid, and further improving the separation effect of each component in the mixed gas.

[0025] Optionally, the flow retarder includes flow retarder plates. There are two flow retarder plates, and the two flow retarder plates are relatively arranged on the upper end surface of the tray, and both are located between the two overflow weirs. Arc-shaped flow retarder grooves are formed on the opposite end faces of the two flow retarder plates. A flow retarder block is also provided on the tray, and the flow retarder block is located in the flow retarder groove, and the end face of the flow retarder block facing the flow retarder groove is an arc surface.

[0026] By adopting the above technical solution, when the mixed liquid flows through the upper end surface of the tray, the flow retarder grooves and the flow retarder blocks have the same effect as the flow guide grooves and the flow guide blocks. The flow retarder grooves and the flow retarder blocks also cause a part of the mixed liquid to flow back, so as to collide with the mixed liquid in the middle of the tray, and then achieve the effect of reducing the flow velocity of the mixed liquid.

[0027] Optionally, a plurality of the flow retarder grooves are provided, and the plurality of flow retarder grooves are evenly spaced along the flow direction of the mixed liquid. A plurality of the flow retarder blocks are provided, and the plurality of flow retarder blocks are evenly spaced along the flow direction of the mixed liquid and correspond to the plurality of flow retarder grooves one by one.

[0028] By adopting the above technical solution, the self-load strength of the flow retarder plate is also enhanced, and thus the probability of damage to the flow retarder plate is reduced.

[0029] Optionally, the heights of the flow retarder plates and the flow retarder blocks are not higher than the height of the overflow weir.

[0030] By adopting the above technical solution, when the heights of the flow retarder plate and the flow retarder block are higher than the overflow weir, the flow retarder plate and the flow retarder block will guide the mixed liquid, thus accelerating the flow of the mixed liquid. Therefore, when set to the same height, the flow rate of the mixed liquid can be slowed down as much as possible, further enhancing the heat exchange effect between the mixed gas and the mixed liquid, and further improving the separation effect of each component in the mixed gas.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. By providing the annular tube, the gas from the bottom to the top of the tower body collides. The gas collision slows down the gas flow rate, increasing the residence time of the gas in the tower body. The longer the interaction time between the gases, the higher the efficiency and effect of gas separation. At the same time, due to the gas collision, the interaction intensity between various gases also increases, further improving the efficiency and effect of gas separation. In addition, this structure does not increase the volume of the equipment, nor does it increase the manufacturing cost, thus generally ensuring relatively good separation efficiency and effect of the distillation column while reducing the manufacturing cost of the equipment.

[0033] 2. The provision of the connecting block not only realizes the connection between the flow guiding block and the annular tube, but also forms a flow guiding hole between two adjacent connecting blocks. The aperture of the flow guiding hole becomes smaller along the gas flow direction, further slowing down the gas flow rate, increasing the residence time of the gas in the tower body, and further improving the efficiency and effect of gas separation.

[0034] 3. The provision of the flow retarder makes the flow rate of the liquid on the tray slower, increasing the contact time between the gas and the liquid, enhancing the heat exchange effect between the gas and the liquid, and further improving the separation effect of each component in the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is the overall structural schematic diagram of the krypton-xenon fine extraction device in the embodiment of the present application.

[0036] Figure 2 is the structural schematic diagram of the tray assembly in the embodiment of the present application.

[0037] Figure 3 is Figure 2 the enlarged schematic diagram at A in

[0038] Figure 4 is the structural schematic diagram of the flow retarder in the embodiment of the present application.

[0039] Figure 5It is a schematic structural diagram of the connecting member in the embodiment of the present application.

[0040] Explanation of reference numerals:

[0041] 1. Tower body; 11. Liquid inlet hole; 12. Liquid inlet pipe; 13. Air outlet hole; 14. Liquid outlet hole; 2. Condensing device; 21. Air outlet pipe; 22. Return pipe; 3. Reboiling device; 31. Liquid outlet pipe; 32. Gas guide pipe; 4. Tray assembly; 41. Tray; 411. Sieve hole; 42. Overflow weir; 43. Downcomer; 44. Annular pipe; 441. Flow guiding block; 442. Flow guiding groove; 443. Connecting member; 444. Flow guiding hole; 45. Flow buffering member; 451. Flow buffering plate; 4511. Flow buffering groove; 452. Flow buffering block. Detailed implementation manners

[0042] The following will further describe the present application in detail with reference to the Figures 1-5 accompanying drawings.

[0043] The embodiment of the present application discloses a krypton-xenon fine extraction device. Referring to Figure 1 , the krypton-xenon fine extraction device includes a tower body 1, a condensing device 2, a reboiling device 3 and a tray assembly 4.

[0044] The tower body 1 in this embodiment is set to be cylindrical and is arranged vertically. A liquid inlet hole 11 is opened on the side wall of the tower body 1. The liquid inlet hole 11 is located in the middle part of the tower body 1 in the vertical direction. A liquid inlet pipe 12 is connected to the liquid inlet hole 11. The end of the liquid inlet pipe 12 far from the tower body 1 is connected to a compressor (not shown in the figure). The compressor is used to liquefy the gas and then transport it into the tower body 1 through the liquid inlet pipe 12 (prior art, not elaborated here). A liquid outlet hole 14 is opened on the lower end surface of the tower body 1, and an air outlet hole 13 is opened on the upper end surface of the tower body 1.

[0045] The condensing device 2 in this embodiment is a condenser, which is mainly used to cool the vaporized liquid to make it return to the liquid state. Of course, in other alternative embodiments, the condensing device 2 can also be other devices with a cooling function. A condensing element and a return channel (not shown in the figure) are provided in the condenser. An air outlet pipe 21 is provided on the condenser. One end of the air outlet pipe 21 is connected to the return channel, and the other end of the air outlet pipe 21 is connected to the air outlet hole 13 on the tower body 1. A return pipe 22 is also fixedly connected to the condenser. The return pipe 22 in this embodiment is a three-way pipe. The first end of the return pipe 22 is connected to the return channel in the condenser. The second end of the return pipe 22 extends into the tower body 1 and is located at the upper end inside the tower body 1. The third end of the return pipe 22 is connected to a light component collection device, which is mainly used to collect the lighter gases in the gas, or can also be connected to the compressor for further fractionation.

[0046] The reboiling device 3 in the embodiment of the present application is a reboiler, which heats the liquid to vaporize it into gas. Of course, in other alternative embodiments, the reboiler can also be other devices with heating functions. The structure of the reboiler is similar to that of the condenser. Inside the reboiler, there are heating elements and a reflux pipe 22 (not shown in the figure). On the reboiler, there is a liquid outlet pipe 31. One end of the liquid outlet pipe 31 communicates with the reflux channel in the reboiler, and the other end of the liquid outlet pipe 31 communicates with the liquid outlet hole 14. A gas guide pipe 32 is also fixedly connected to the reboiler. One end of the gas guide pipe 32 communicates with the reflux channel in the reboiler, and the other end of the gas guide pipe 32 extends into the tower body 1 and is located at the lower end inside the tower body 1. The reboiler is fixedly connected with a conduit, and the end of the conduit far from the reboiler communicates with the heavy component collection device. The heavy component collection device is used to collect the lighter gas in the unvaporized liquid or gas.

[0047] A plurality of tray assemblies 4 are provided, and the plurality of tray assemblies 4 are evenly spaced along the axial direction of the tower body 1. In this embodiment, the number of tray assemblies 4 is set to six. Of course, in other alternative embodiments, the number of tray assemblies 4 can be determined according to actual situations. The tray assembly 4 includes a tray 41, an overflow weir 42, and a downcomer 43.

[0048] In this embodiment, the tray 41 is correspondingly set to be circular, and the tray 41 is fixedly installed on the inner wall of the tower body 1 in the horizontal direction. A plurality of sieve holes 411 are formed in the middle part of the tray 41, and the plurality of sieve holes 411 are arranged in an array on the tray 41. There are two overflow weirs 42, which are oppositely arranged on the upper surface of the tray 41. The downcomer 43 is installed on the lower surface of the tray 41 in the vertical direction. The downcomer 43 is not in the space between the two overflow weirs 42, but is on the left or right side of the two overflow weirs 42.

[0049] Since the six tray assemblies 4 are evenly spaced in the vertical direction, and the downcomers 43 are also spaced in the vertical direction, when the liquid flows out from the reflux pipe 22 on the tower body 1, the liquid first falls on the upper surface of the uppermost tray 41. When the liquid level exceeds the overflow weir 42, the liquid flows from the downcomer 43 to the next lower tray 41. The intervals of the downcomers 43 on the upper and lower trays 41 are staggeredly arranged, so that the liquid can flow in an S shape, which relatively increases the flow path of the liquid. And with the cooperation of the overflow weir 42, the flow rate of the liquid is delayed, enabling the liquid and gas in the tower body 1 to fully exchange heat, thereby accelerating the separation of various gases.

[0050] The lower end face of the tray 41 is provided with an annular pipe 44. In this embodiment, there are also six annular pipes 44, and the six annular pipes 44 correspond to the six trays 41 one by one. The annular pipes 44 are arranged vertically and communicate with a plurality of sieve holes 411. A plurality of arc-shaped flow guide grooves 442 are formed on the inner wall of the annular pipe 44, and the plurality of flow guide grooves 442 are all arranged around the axis direction of the annular pipe 44. Only one flow guide groove 442 is shown in this embodiment. Of course, in other alternative embodiments, the number of flow guides can be determined according to the actual situation. Two or more flow guide grooves 442 are arranged at equal intervals in sequence along the axial direction of the annular pipe 44, which makes the overall mass distribution of the annular pipe 44 relatively uniform, thereby improving the overall load strength of the annular pipe 44.

[0051] A plurality of flow guide blocks 441 are arranged in the annular pipe 44. The flow guide blocks 441 are adapted to the flow guide grooves 442. Therefore, the number of flow guide blocks 441 in this embodiment is also set to one. The surface of the flow guide block 441 facing the flow guide groove 442 is an arc surface. The flow guide block 441 is an annular block and is arranged coaxially with the annular pipe 44.

[0052] A connecting member 443 is arranged between the flow guide block 441 and the groove wall of the flow guide groove 442. The connecting member 443 is a plurality of connecting blocks.

[0053] One end of the connecting block is fixedly connected to the groove wall of the flow guide groove 442, and one end of the connecting block is fixedly connected to the flow guide block 441. There are six connecting blocks in this embodiment, and the six connecting blocks are arranged at equal intervals around the axis of the annular pipe 44. The equal interval arrangement of the six connecting blocks can make the loads borne by the six connecting blocks basically the same. Therefore, a certain connecting block will not break due to a huge load, thereby improving the connection strength between the flow guide block 441 and the annular pipe 44. Of course, in other alternative embodiments, the number of connecting blocks can be determined according to the actual situation.

[0054] In addition, a flow guide hole 444 is formed between two adjacent connecting blocks to allow gas to flow through the flow guide groove 442. Moreover, the opposite surfaces of two adjacent connecting blocks are inclined surfaces that are inclined in the direction of moving away from each other. Therefore, the flow guide hole 444 is a tapered hole, and the aperture of the flow guide hole 444 gradually increases along the flow direction of the gas. Therefore, when the gas flows through the flow guide hole 444, the gas moves from a relatively small space to a relatively large space, so the pressure of the gas decreases, and its flow velocity will further slow down, so that the flow time of the gas in the tower body 1 is further increased, and the interaction time between the gases is longer, thereby further improving the efficiency and effect of gas separation.

[0055] In summary, when the concentrated mixed liquid flows into the tower from the liquid inlet pipe 12, start the condensing device 2 and the reboiling device 3. The mixed liquid will flow to the bottom of the tower body 1 along the lower tower plates 41, and then flow into the reboiling device 3 along the liquid outlet pipe 31. The reboiling device 3 heats and vaporizes a part of the mixed liquid to form a mixed gas, and the mixed gas enters the bottom of the tower body 1 through the air inlet pipe. The pressure at the bottom of the tower body 1 gradually increases. Since the mixed gas is light in mass and high in temperature, the mixed gas will flow upward. Then the mixed gas will reach the sieve holes 411 of the tower plate 41. The strong air pressure will push open the sieve holes 411 and contact the mixed liquid with a lower temperature. Thus, a part of the heat in the mixed gas will be absorbed by the mixed liquid, and the lighter gas will continue to flow upward, while the heavier gas will stay in place or move down to the bottom inside the tower body 1.

[0056] The gas in the upper part of the tower body 1 enters the condensing device 2 through the air outlet pipe 21. The condensing device 2 will cool and liquefy a part of the gas. Then the new liquid will enter the tower body 1 through one end of the reflux pipe 22 for further fractional distillation, and a part of the light-quality gas will be collected through one end of the reflux pipe 22. In this cycle, the mixed liquid will be fractionated multiple times, and finally the corresponding krypton-xenon gas will be obtained.

[0057] During this process, when the mixed gas flows into the annular pipe 44, a part of the mixed gas entering the annular pipe 44 will flow through the middle part of the annular pipe 44, while the other part will enter the diversion groove 442, and then enter the middle part of the annular pipe 44. Since the diversion groove 442 is arc-shaped, the flow direction of the mixed gas coming out of the diversion groove 442 has a certain angle with the flow direction of the mixed gas in the middle part of the annular pipe 44. Thus, the mixed gas in the two paths will collide. The collision of the mixed gas will slow down the flow rate of the mixed gas, so that the flow time of the mixed gas in the tower body 1 increases, and the interaction time between the mixed gases is longer, thereby improving the separation efficiency and effect of the mixed gas.

[0058] At the same time, due to the collision of the mixed gas, the interaction intensity between various mixed gases will also increase, further improving the separation efficiency and effect of the mixed gas. In addition, this structure does not increase the volume of the equipment, nor does its manufacturing cost increase. Thus, overall, it tries to ensure that the rectifying tower has relatively good separation effect and efficiency, while reducing the manufacturing cost of the equipment.

[0059] Moreover, the slowdown of the gas flow velocity also increases the contact time between the mixed gas and the mixed liquid, making the heat transfer effect between the mixed gas and the mixed liquid better, thereby further accelerating the separation of various gases in the mixed gas and further improving the separation effect and efficiency of the device.

[0060] Therefore, in order to further improve the separation effect and efficiency of the present device, a flow retarder 45 is provided on the upper end surface of the tray 41, and the flow retarder 45 includes a flow retarder plate 451.

[0061] There are two flow retarder plates 451, which are oppositely arranged on the upper end surface of the tray 41 and are located at the edge part of the tray 41. Both flow retarder plates 451 are located between the two overflow weirs 42. Arc-shaped flow retarder grooves 4511 are formed on the opposite end faces of the two flow retarder plates 451. A flow retarder block 452 is also provided on the tray 41, and the flow retarder block 452 is located in the flow retarder groove 4511. The end face of the flow retarder block 452 facing the flow retarder groove 4511 is an arc surface. The flow retarder groove 4511 and the flow retarder block 452 have the same principle and effect as the flow guiding groove 442 and the flow guiding block 441. The flow retarder groove 4511 and the flow retarder block 452 can slow down the flow velocity of the liquid, increase the contact time between the mixed gas and the mixed liquid, further enhance the heat transfer effect between the mixed gas and the mixed liquid, and thus further accelerate the separation of various gases in the mixed gas.

[0062] Similarly, there are multiple flow retarder grooves 4511, which are evenly spaced along the liquid flow direction. There are multiple flow retarder blocks 452, which are evenly spaced along the liquid flow direction and correspond to the multiple flow retarder grooves 4511 one by one. In this embodiment, there are six flow retarder grooves 4511 and six flow retarder blocks 452 on each flow retarder plate 451. Among them, the flow retarder grooves 4511 in the two flow retarder plates 451 correspond to each other in the horizontal direction. Of course, in other alternative embodiments, the number of flow retarder grooves 4511 can be determined according to actual situations.

[0063] In addition, when the heights of the flow retarder plate 451 and the flow retarder block 452 are higher than those of the overflow weir 42, the flow retarder plate 451 and the flow retarder block 452 will guide the liquid, thus accelerating the flow of the liquid. Therefore, in this embodiment, the flow retarder plate 451, the flow retarder block 452 and the overflow weir 42 have the same height. When set to the same height, the flow velocity of the liquid can be slowed down as much as possible, thereby further strengthening the heat exchange effect between the gas and the liquid, and further improving the separation effect of each component in the gas. Of course, in other alternative embodiments, the heights of the flow retarder plate 451 and the flow retarder block 452 can also be lower than the height of the overflow weir 42.

[0064] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. Krypton-xenon extraction device, characterized in that, Comprising: A tower body (1), an inlet liquid hole (11) is formed in the side wall of the tower body (1), an outlet liquid hole (14) is formed in the lower end surface of the tower body (1), and an outlet gas hole (13) is formed in the upper end surface of the tower body (1); A condensation device (2), the condensation device (2) is communicated with the outlet gas hole (13) through an outlet gas pipe (21), a reflux pipe (22) is connected to the condensation device (2), the reflux pipe (22) is communicated with the condensation device (2), one end of the reflux pipe (22) is communicated with the upper part of the tower body (1), and the other end of the reflux pipe (22) is communicated with a light component collection device; A reboiling device (3), the reboiling device (3) is communicated with the outlet liquid hole (14) through an outlet liquid pipe (31), a guide gas pipe (32) is connected to the reboiling device (3), one end of the guide gas pipe (32) is communicated with the reboiling device (3), one end of the guide gas pipe (32) is communicated with the lower part of the tower body (1), and the reboiling device (3) is communicated with a heavy component collection device through a conduit; A tower plate assembly (4), the tower plate assembly (4) includes a tower plate (41), an overflow weir (42) and a downcomer (43), the tower plate (41) is horizontally installed on the inner wall of the tower body (1), a plurality of sieve holes (411) are formed in the tower plate (41), two overflow weirs (42) are provided and are oppositely arranged on the upper end surface of the tower plate (41), the downcomer (43) is vertically installed on the lower end surface of the tower plate (41), the downcomer (43) is located outside the two overflow weirs (42), a ring pipe (44) is arranged on the lower end surface of the tower plate (41), the ring pipe (44) is vertically arranged and is communicated with a plurality of sieve holes (411), an arc-shaped diversion groove (442) is formed in the inner wall of the ring pipe (44), the diversion groove (442) is arranged around the axis direction of the ring pipe (44), a diversion block (441) is arranged in the ring pipe (44), the diversion block (441) is adapted to the diversion groove (442), the surface of the diversion block (441) facing the diversion groove (442) is an arc surface, the diversion block (441) is a ring block and is coaxially arranged with the ring pipe (44), and a connecting piece (443) is arranged between the diversion block (441) and the groove wall of the diversion groove (442), and the connecting piece (443) is used to fix the diversion block (441) in the ring pipe (44); A plurality of the diversion grooves (442) are arranged along the axis direction of the ring pipe (44), a plurality of the diversion blocks (441) are arranged along the axial direction of the ring pipe (44), the plurality of diversion blocks (441) correspond to the plurality of diversion grooves (442) one by one, a plurality of the connecting pieces (443) are provided, and the plurality of connecting pieces (443) correspond to the diversion blocks (441) one by one; the plurality of diversion grooves (442) are evenly spaced along the axis direction of the ring pipe (44), and the plurality of diversion blocks (441) are evenly spaced along the axis direction of the ring pipe (44); The connecting member (443) includes connecting blocks. A plurality of the connecting blocks are provided, and a diversion hole (444) is formed between two adjacent connecting blocks. One end of the connecting block is fixedly connected to the groove wall of the diversion groove (442), and one end of the connecting block is fixedly connected to the diversion block (441); the plurality of connecting blocks are arranged at equal intervals around the axis of the annular pipe (44); the opposite surfaces of two adjacent connecting blocks are inclined planes that are inclined in a direction away from each other.

2. The krypton-xenon fine extraction device according to claim 1, characterized in that: A flow retarder (45) is provided on the upper end surface of the tray (41), and the flow retarder (45) is used to slow down the flow rate of the liquid on the tray (41).

3. The krypton-xenon fine extraction device according to claim 2, wherein: The flow retarder (45) includes flow retarder plates (451). Two flow retarder plates (451) are provided. The two flow retarder plates (451) are oppositely arranged on the upper end surface of the tray (41), and both of the two flow retarder plates (451) are located between the two overflow weirs (42). Arc-shaped flow retarder grooves (4511) are formed on the opposite end surfaces of the two flow retarder plates (451). A flow retarder block (452) is further provided on the tray (41). The flow retarder block (452) is located in the flow retarder groove (4511), and the end surface of the flow retarder block (452) facing the flow retarder groove (4511) is an arc surface.

4. The krypton-xenon fine extraction device according to claim 3, wherein: A plurality of the flow retarder grooves (4511) are provided. The plurality of flow retarder grooves (4511) are arranged at equal intervals along the liquid flow direction. A plurality of the flow retarder blocks (452) are provided. The plurality of flow retarder blocks (452) are arranged at equal intervals along the liquid flow direction and correspond to the plurality of flow retarder grooves (4511) one by one.

5. The krypton-xenon fine extraction device according to claim 4, characterized in that: The heights of the flow retarder plates (451) and the flow retarder blocks (452) are not higher than the height of the overflow weir (42).

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