Krypton-xenon separating tower for air separation system

Abstract

The invention relates to the technical field of krypton and xenon separation, in particular to a krypton and xenon separation tower used in an air separation system. Comprising a base and a tower body installed at the upper end of the base. A sieve plate is fixedly mounted on the inner wall of the tower body; an exhaust port is formed in the upper end of the tower body; a feeding opening is formed in one side of the base, and two sliding grooves are formed in the inner wall of the tower body; a polished rod and a lead screw are rotationally connected into the two sliding grooves correspondingly. By arranging the lifting plate, when a user controls the lifting plate to ascend and descend in the tower body, the lifting plate can push krypton and xenon raw materials to move in the tower body, so that the lifting plate can flexibly adjust the space in the tower according to the actual production scale, and when the production scale is small, the lifting plate is lifted, the space in the tower is reduced, and the energy consumption and the equipment operation cost are reduced; and when the production scale is expanded, the lifting plate is lowered, the space in the tower is enlarged, and the treatment capacity of high-flow krypton-xenon mixed raw materials is improved, so that the production requirements are met, and the practical application effect of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of krypton-xenon separation, in particular to a krypton-xenon separation tower used in an air separation system. Background Art

[0002] Krypton and xenon are rare gases in the air with unique properties. They are widely used in many industries such as lighting fixture filling gas, flat-panel TV manufacturing, and electronic chip manufacturing. The krypton-xenon separation tower is a device used to separate krypton and xenon gases, and plays a key role in the extraction and production of krypton and xenon gases.

[0003] Taking the krypton-xenon separation tower in industry as an example, its workflow is as follows: air first enters the air separation cold box, then is transported to the liquid oxygen tower via a compressor. The liquid oxygen tower is then connected to the krypton-xenon mixture tower. The krypton-xenon mixture is then purified through a series of devices such as a methane remover. The purified krypton-xenon liquid enters the processing and separation tower structure, which includes a krypton-xenon concentration tower and a krypton-xenon separation tower. The krypton-xenon liquid extracted from the krypton-xenon concentration tower enters the krypton-xenon separation tower. The condenser at the top of the tower wall and the evaporator at the bottom further enhance distillation, separating low-boiling-point and high-boiling-point substances. The liquid is finally collected into a krypton liquid bottle through a pipe at the top and a xenon liquid bottle through a pipe at the bottom.

[0004] Different production scales have different requirements for the processing volume and purity of krypton-xenon separation. For example, small-scale experiments or specific R&D projects in scientific research institutions only require a small amount of high-purity krypton-xenon gas for research, and there is no need to process large amounts of raw gas. In this case, the use of a small krypton-xenon separation tower can avoid waste of equipment resources and reduce unnecessary construction and operating costs. However, in high-end application fields such as semiconductor manufacturing, medical imaging, and laser technology, high-purity krypton-xenon gas is required to ensure product quality and performance. Therefore, large krypton-xenon separation towers are needed to process larger flow rates of krypton-xenon mixed raw materials to ensure production continuity and stability. However, the height of existing krypton-xenon separation towers is fixed. This fixed height design limits the effective application of krypton-xenon separation towers under different production scales and cannot achieve precise adaptation to krypton-xenon separation processing.

[0005] In view of this, in order to overcome the above technical problems, the present invention proposes a krypton-xenon separation tower for use in an air separation system, which solves the above technical problems. Summary of the Invention

[0006] To overcome the deficiencies of the prior art, the present invention proposes a krypton-xenon separation tower for use in an air separation system. The present invention provides a lifting plate. When a user controls the lifting plate to rise and fall within the tower body, the lifting plate can propel the krypton-xenon raw materials within the tower body. This allows the lifting plate to flexibly adjust the space within the tower according to the actual production scale. When the production scale is small, the lifting plate is raised to reduce the space within the tower, thereby reducing energy consumption and equipment operating costs. When the production scale is expanded, the lifting plate is lowered to increase the space within the tower, thereby improving the processing capacity for large flows of krypton-xenon mixed raw materials, thereby meeting production needs and enhancing the practical application effects of the present invention.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: a krypton-xenon separation tower for an air separation system according to the present invention comprises a base and a tower body mounted on the upper end of the base; a sieve plate is fixedly mounted on the inner wall of the tower body; an exhaust port is provided on the upper end of the tower body; a feed port is provided on one side of the base, and two slide grooves are provided on the inner wall of the tower body; a light rod and a lead screw are rotatably connected in the two slide grooves respectively; a lifting plate is provided inside the tower body; the lifting plate is in sliding and sealing contact with the inner wall of the tower body; the lifting plate is spirally connected to the lead screw; a driving motor is installed on the upper end of the tower body; the driving motor is used to drive the lead screw to rotate; a support rod is fixedly mounted on the inner wall of the tower body; the support rod is located below the sieve plate; the lower end of the support rod is rotatably connected to a stirring rod; the stirring rod and the driving motor are connected by a transmission unit, a through groove is provided on the surface of the lifting plate; the through groove and the feed port are connected by a telescopic tube; and a solenoid valve is installed in the through groove.

[0008] Preferably, a blocking block is fixedly connected to the upper end of the lifting plate; three blocking blocks are provided; and the three blocking blocks surround the feed port.

[0009] Preferably, the drive motor includes a No. 1 drive motor and a No. 2 drive motor; the No. 1 drive motor is used to drive the screw to rotate; the No. 2 drive motor is used to drive the smooth rod to rotate; the transmission unit includes a double-headed bevel gear and a bevel gear ring; the double-headed bevel gear is rotatably connected to the inside of the support rod; the upper end of the stirring rod is fixedly connected to a bevel gear shaft that meshes with the double-headed bevel gear; the surface of the smooth rod is mounted with a bevel gear ring that meshes with the double-headed bevel gear.

[0010] Preferably, the stirring rod includes a rotating rod and a straight rod; the bevel gear shaft is fixedly connected to the upper end of the rotating rod; a circular groove is opened at the upper end of the straight rod; the rotating rod is slidingly sealed and connected in the circular groove; the rotating rod and the bottom of the circular groove are connected by a connecting spring.

[0011] Preferably, the surfaces of the screw rod and the polished rod are both sleeved with a bellows; one end of the bellows is fixedly connected to the lifting plate, and the other end is connected to the groove wall of the slide groove.

[0012] Preferably, a connecting block is fixedly connected to the outer wall of the tower body; a hydraulic push rod is provided between the connecting block and the base; one end of the hydraulic push rod is fixedly connected to the base, and the other end is fixedly connected to the connecting block.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention provides a lifting platform. When the user controls the lifting platform to move up and down within the tower body, the lifting platform can push the krypton-xenon raw materials within the tower body, allowing the lifting platform to flexibly adjust the space within the tower according to the actual production scale. When the production scale is small, the lifting platform is raised to reduce the space within the tower, thereby reducing energy consumption and equipment operating costs. When the production scale is expanded, the lifting platform is lowered to increase the space within the tower, thereby improving the processing capacity for large flows of krypton-xenon mixed raw materials, thereby meeting production needs and enhancing the practical application effect of the present invention.

[0015] 2. The present invention incorporates a stirring rod that stirs the krypton-xenon mixture within the tower, thereby forcing mixing of the mixture and achieving more uniform contact between the gas and liquid phases. This effectively reduces mass transfer resistance, thereby accelerating the exchange rate of components between the phases and facilitating the separation of krypton and xenon. Furthermore, if the raw material mixture contains trace amounts of high-boiling-point impurities, such as carbon oxides, stirring can enhance the turbulence of the mixture, slowing the deposition of impurities and reducing the risk of scaling, thereby ensuring the efficiency and stability of the distillation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 It is a perspective view of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the present invention;

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 It is a partial structural diagram of the lifting plate used in the present invention;

[0021] In the figure: 1. Base; 11. Tower body; 111. Sieve plate; 112. Exhaust port; 113. Feed port; 114. Drive motor No. 1; 115. Drive motor No. 2; 12. Slide; 121. Polished rod; 122. Screw rod; 123. Bellows; 13. Lifting plate; 131. Through groove; 132. Telescopic tube; 133. Solenoid valve; 134. Blocking block; 14. Support rod; 141. Double-headed bevel gear; 142. Bevel gear ring; 143. Bevel gear shaft; 15. Stirring rod; 151. Rotating rod; 152. Straight rod; 153. Circular groove; 154. Connecting spring; 16. Connecting block; 17. Hydraulic push rod. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 4 The cam is provided with an axially traversing mechanism, and the cam is provided with an air filter, and the cam is provided with an air filter, and the cam is provided with an air filter, and the cam is provided with an air filter, and the cam is provided with an agitator, and the cam is provided with an inlet and an outlet.

[0024] As an embodiment of the present invention, a blocking block is fixedly connected to the upper end of the lifting plate; three blocking blocks are provided; and the three blocking blocks surround the feed port.

[0025] As an embodiment of the present invention, the drive motor includes a No. 1 drive motor and a No. 2 drive motor; the No. 1 drive motor is used to drive the screw to rotate; the No. 2 drive motor is used to drive the smooth rod to rotate; the transmission unit includes a double-headed bevel gear and a bevel gear ring; the double-headed bevel gear is rotatably connected to the inside of the support rod; the upper end of the stirring rod is fixedly connected to a bevel gear shaft that meshes with the double-headed bevel gear; the surface of the smooth rod is mounted with a bevel gear ring that meshes with the double-headed bevel gear.

[0026] As an embodiment of the present invention, the stirring rod includes a rotating rod and a straight rod; the bevel gear shaft is fixedly connected to the upper end of the rotating rod; a circular groove is opened at the upper end of the straight rod; the rotating rod is slidingly sealed and connected in the circular groove; the rotating rod and the bottom of the circular groove are connected by a connecting spring.

[0027] As an embodiment of the present invention, the surfaces of the screw rod and the polished rod are both sleeved with a bellows; one end of the bellows is fixedly connected to the lifting plate, and the other end is connected to the groove wall of the slide groove.

[0028] As an embodiment of the present invention, a connecting block is fixedly connected to the outer wall of the tower body; a hydraulic push rod is provided between the connecting block and the base; one end of the hydraulic push rod is fixedly connected to the base, and the other end is fixedly connected to the connecting block;

[0029] During operation, different production scales have different requirements for the processing volume and purity of krypton-xenon separation. For example, small-scale experiments or specific R&D projects in scientific research institutions only require a small amount of high-purity krypton-xenon gas for research, and there is no need to process a large amount of raw gas. In this case, the use of a small krypton-xenon separation tower can avoid the waste of equipment resources and reduce unnecessary construction and operating costs. However, in high-end application fields such as semiconductor manufacturing, medical imaging, and laser technology, high-purity krypton-xenon gas is required to ensure product quality and performance. Therefore, large krypton-xenon separation towers are needed to process larger flow rates of krypton-xenon mixed raw materials to ensure production continuity and stability. However, the height of existing krypton-xenon separation towers is fixed. This fixed height design limits the effective application of krypton-xenon separation towers under different production scales and cannot achieve precise adaptation to krypton-xenon separation processing.

[0030] To this end, the present invention provides a lifting plate 13. When a user controls the lifting plate 13 to rise and fall within the tower body 11, the lifting plate 13 can push the krypton-xenon raw material to move within the tower body 11, so that the lifting plate 13 can flexibly adjust the space within the tower according to the actual production scale. When the production scale is small, the lifting plate 13 is raised to reduce the space within the tower, thereby reducing energy consumption and equipment operating costs. When the production scale is expanded, the lifting plate 13 is lowered to increase the space within the tower, thereby improving the processing capacity for a large flow of krypton-xenon mixed raw material, thereby meeting production needs and improving the practical application effect of the present invention.

[0031] During use, the user first controls the external evaporator to be connected to the exhaust port 112 of the tower body 11, and then controls the external evaporator to absorb heat from the gas phase at the top of the tower through the exhaust port 112, so that the temperature inside the tower body 11 drops, and the temperature at the bottom of the tower body 11 is lower than -95°C. At this time, the solenoid valve 133 in the through groove 131 is controlled to open, and then the external conveying equipment is controlled to convey the krypton-xenon mixed liquid into the tower body 11 through the feed port 113. Since the feed port 113 is connected to the through groove 131 on the surface of the lifting plate 13 through the telescopic tube 132, the krypton-xenon mixed liquid entering the tower body 11 can pass through the telescopic tube 132 and the through groove 131 to the upper end of the lifting plate 13. Moreover, since a blocking block 134 is fixedly connected to the upper end of the lifting plate 13, the blocking block 134 is provided to block the stirring rod 15 to prevent the stirring rod 15 from blocking the through groove 131, thereby ensuring that the external conveying equipment conveys the material to the feed port. The krypton-xenon mixture in 113 can flow to the upper end of the lifting plate 13 through the through groove 131. Since temperature affects the gas-liquid equilibrium state of krypton and xenon, at temperatures below -95°C, the difference in volatility between krypton and xenon allows them to achieve initial separation and enrichment within the krypton-xenon separation tower. That is, krypton is concentrated more toward the top of the tower, while xenon is retained more at the bottom, thereby achieving initial separation of the two. The separated krypton gas will rise to the sieve plate 111. As one of the core components of the krypton-xenon separation tower, the sieve plate 111 is covered with many uniform small holes on its surface. These holes are typically in the range of 3 to 8 mm in diameter and are arranged in the form of an equilateral triangle to ensure good distribution and operational performance. The design of the sieve plate 111 allows the gas to rise through the sieve holes and gradually contact the liquid on the sieve plate 111, thereby achieving efficient mass and heat exchange, thereby enabling the sieve plate 111 to promote mass transfer and separation of the gas-liquid two-phase.

[0032] During the lifting and lowering process of the lifting plate 13 in the tower body 11, the lifting plate 13 will push the bellows 123 on the surface of the polished rod 121 and the screw rod 122 to expand and contract. By setting the corrugated bellows 123, the bellows 123 can prevent the krypton-xenon mixture from contacting the polished rod 121 and the screw rod 122, so as to prevent the krypton-xenon mixture from flowing out through the gap between the lifting plate 13 and the polished rod 121 and the screw rod 122, thereby ensuring that the krypton-xenon mixture can be pushed by the lifting plate 13 and stably lifted and lowered in the tower body 11, thereby ensuring that the krypton-xenon mixture is stable at the upper end of the lifting plate 13. Fixed separation; and the bellows 123 and the telescopic tube 132 are made of diene cryogenic rubber and plastic material, so that the bellows 123 and the telescopic tube 132 have good low-temperature resistance, that is, the bellows 123 and the telescopic tube 132 of the material can be used in the pipeline temperature range of -200℃ to +125℃, that is, in a low temperature environment of -95℃, the bellows 123 not only maintains elasticity, but also effectively absorbs stress impact, reduces the risk of vibration cracking and failure at low temperature, and effectively improves the service life and use effect of the bellows 123.

[0033] In a krypton-xenon mixture, the distribution of krypton and xenon is often uneven, with local concentration differences. This results in mass transfer resistance that hinders the exchange of krypton and xenon between the gas and liquid phases, affecting separation efficiency. Therefore, to accelerate the separation of krypton and xenon within tower body 11, the present invention provides a stirring rod 15 that can stir the krypton-xenon mixture within tower body 11, thereby forcibly mixing the krypton-xenon mixture and achieving more uniform contact between the gas and liquid phases. This effectively reduces mass transfer resistance, thereby accelerating the exchange rate of interphase components and facilitating the separation of krypton and xenon. Furthermore, if the raw material mixture contains trace amounts of high-boiling-point impurities, such as carbon oxides, stirring can enhance the turbulence of the mixture, slow the deposition of impurities, reduce the risk of scaling, and ensure the efficiency and stability of the distillation process.

[0034] After the krypton-xenon mixture is transported to the interior of the tower body 11, the user first controls the No. 1 drive motor 114 to drive the screw 122 to rotate, so that the screw 122 can drive the lifting plate 13 to rise, so that the space in the tower body 11 is continuously reduced. During the rising process of the lifting plate 13, the lifting plate 13 can push the straight rod 152 to rise through the blocking block 134, so that the rotating rod 151 can descend relative to the straight rod 152, so that during the descending process of the rotating rod 151, the connecting spring 154 can be squeezed into the circular groove 153, so that the total length of the straight rod 152 and the rotating rod 151 is reduced, so that the stirring rod 15 can be extended and retracted, thereby preventing the stirring rod 15 from interfering with the rising of the lifting plate 13, and ensuring that the lifting plate 13 can be within the tower body. 11 is stably raised and lowered, thereby flexibly adjusting the space inside the tower body 11, until the lifting plate 13 is raised to a specified height, at which point the space inside the tower body 11 reaches the desired size. Subsequently, the user controls the second drive motor 115 to operate, so that the second drive motor 115 can drive the polished rod 121 to rotate, so that the polished rod 121 can drive the bevel gear ring 142 connected thereto to rotate, so that the bevel gear ring 142 can drive the bevel gear shaft 143 to rotate through the double-headed bevel gear 141 meshing therewith, so that the bevel gear shaft 143 drives the rotating rod 151 connected thereto to rotate, so that the rotating rod 151 can drive the straight rod 152 to rotate, so that the straight rod 152 can effectively stir the krypton-xenon mixed liquid in the tower body 11;

[0035] Under the traditional maintenance method, due to the small space inside the tower, it is inconvenient for staff to operate, maintenance is difficult, and there are certain safety risks. To this end, the present invention provides a hydraulic push rod 17. When the staff enters the tower to perform equipment maintenance, inspection and cleaning, they only need to remove the bolts connecting the tower body 11 and the base 1 first, and then control the hydraulic push rod 17 to extend so that the hydraulic push rod 17 can smoothly push the tower body 11 up, so that the tower body 11 and the base 1 are gradually separated. In this process, the hydraulic push rod 17 pushes the tower body 11 to rise smoothly and orderly, avoiding equipment damage or personnel safety hazards caused by shaking or instability during the rising process. When the tower body 11 is separated from the base 1 to a certain distance, the space inside the tower is fully exposed, creating a spacious and convenient working environment for the staff, so that the staff can easily enter the tower and perform maintenance and replacement operations on the lifting plate 13, thereby reducing the difficulty and risk of maintenance and improving the efficiency and quality of maintenance work.

[0036] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A krypton-xenon separation tower for use in an air separation system, comprising a base (1) and a tower body (11) mounted on the upper end of the base (1); a sieve plate (111) is fixedly mounted on the inner wall of the tower body (11); an exhaust port (112) is provided at the upper end of the tower body (11); and a feed port (113) is provided on one side of the base (1), characterized in that: The inner wall of the tower body (11) is provided with two chute grooves (12); a light rod (121) and a screw rod (122) are rotatably connected in the two chute grooves (12); a lifting plate (13) is provided inside the tower body (11); the lifting plate (13) is in sliding and sealing contact with the inner wall of the tower body (11); the lifting plate (13) is connected to the screw rod (122) by spiral transmission; a driving motor is installed at the upper end of the tower body (11); the driving motor is used to drive the screw rod (122) to rotate; the A support rod (14) is fixedly installed on the inner wall of the tower body (11); the support rod (14) is located below the sieve plate (111); a stirring rod (15) is rotatably connected to the lower end of the support rod (14); the stirring rod (15) is connected to the drive motor via a transmission unit; a through groove (131) is provided on the surface of the lifting plate (13); the through groove (131) is connected to the feed port (113) via a telescopic tube (132); and a solenoid valve (133) is installed in the through groove (131).

2. The krypton-xenon separation tower for an air separation system according to claim 1, characterized in that: A blocking block (134) is fixedly connected to the upper end of the lifting plate (13); three blocking blocks (134) are provided; and the three blocking blocks (134) surround the feed port (113).

3. The krypton-xenon separation tower for an air separation system according to claim 2, characterized in that: The driving motor comprises a first driving motor (114) and a second driving motor (115); the first driving motor (114) is used to drive the screw rod (122) to rotate; the second driving motor (115) is used to drive the polished rod (121) to rotate; the transmission unit comprises a double-headed bevel gear (141) and a bevel gear ring (142); the double-headed bevel gear (141) is rotatably connected to the inside of the support rod (14); the upper end of the stirring rod (15) is fixedly connected to a bevel gear shaft (143) meshing with the double-headed bevel gear (141); and the surface of the polished rod (121) is mounted with a bevel gear ring (142) meshing with the double-headed bevel gear (141).

4. The krypton-xenon separation tower for an air separation system according to claim 3, characterized in that: The stirring rod (15) comprises a rotating rod (151) and a straight rod (152); the bevel gear shaft (143) is fixedly connected to the upper end of the rotating rod (151); a circular groove (153) is provided at the upper end of the straight rod (152); the rotating rod (151) is slidingly sealed and connected in the circular groove (153); the rotating rod (151) and the bottom of the circular groove (153) are connected via a connecting spring (154).

5. The krypton-xenon separation tower for an air separation system according to claim 4, characterized in that: The surfaces of the screw rod (122) and the polished rod (121) are both sleeved with a bellows (123); one end of the bellows (123) is fixedly connected to the lifting plate (13), and the other end is connected to the groove wall of the sliding groove (12).

6. The krypton-xenon separation tower for an air separation system according to claim 5, characterized in that: A connecting block (16) is fixedly connected to the outer wall of the tower body (11); a hydraulic push rod (17) is provided between the connecting block (16) and the base (1); one end of the hydraulic push rod (17) is fixedly connected to the base (1), and the other end is fixedly connected to the connecting block (16).

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