Krypton and xenon screening fractionation tower

Abstract

The utility model discloses a krypton and xenon screening fractionation tower which comprises a fractionating tower, a heat exchange pipe is arranged in the fractionating tower, a liquid nitrogen pipeline is installed in the heat exchange pipe, and a plurality of signal receiving and transmitting devices are installed on the outer side wall face of the fractionating tower. The signal receiving transmitter penetrates through the wall face of the fractionating tower and is connected with a sensor probe towards the interior of the liquid nitrogen pipeline, a liquid xenon outlet is formed in the bottom end of the fractionating tower, a krypton gas outlet is formed in the top end of the fractionating tower, a gas-liquid separator base is installed at the top in the fractionating tower, a gas-liquid separator is installed in the gas-liquid separator base, and the gas-liquid separator is connected with the liquid nitrogen pipeline. When the device is used, each section in the heat exchange tube in the fractionating tower can be monitored, the temperature in the fractionating tower can be conveniently adjusted, the separation of krypton and liquid xenon is favorably improved, and the gas-liquid separator is arranged at the tower top, so that the purity of krypton at a krypton outlet is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fractionation towers, in particular to a krypton-xenon gas screening and fractionation tower. Background Art

[0002] A distillation tower is a tower-type gas-liquid contact device for distillation. It uses the boiling point difference of different components in the raw materials to separate the raw materials by distillation to obtain high-purity components.

[0003] When the existing distillation tower is used to distill a mixed liquid composed of multiple substances with different boiling points, the liquid absorbs heat and partially evaporates, and the volatile component evaporates more. When the mixed steam releases heat and partially condenses, the non-volatile component condenses more. The saturated steam with a higher temperature is contacted with the saturated liquid with a lower temperature, and the liquid absorbs heat and partially evaporates. When the steam is partially condensed, the non-volatile component condenses more, so the concentration of the low-boiling point component in the steam increases. After a partial evaporation and partial condensation, the steam with a higher low-boiling point component and the liquid with a higher high-boiling point component are contacted with the liquid and steam at different temperatures respectively, and partial condensation and partial evaporation occur again, so that the concentration of the low-boiling point component in the steam and the concentration of the high-boiling point component in the liquid are further increased. This process is repeated many times, and the concentration of the low-boiling point component in the steam becomes higher and higher, and the concentration of the high-boiling point component in the liquid becomes higher and higher, and finally separation is achieved.

[0004] The existing distillation tower forms a distillation effect by setting an evaporator at the bottom or a condenser at the top. However, the power of the evaporator and the condenser is too high and they rely on heat sources or cold sources to work. In the refined krypton-xenon project, the existing distillation tower is difficult to control the load and it is not easy to accurately adjust the distillation, so it is difficult to achieve the distillation effect and it is difficult to produce high-purity krypton-xenon products. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a krypton-xenon gas screening and fractionation tower, which solves the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a krypton-xenon gas screening fractionation tower, including a fractionation tower, a heat exchange tube is provided in the fractionation tower, a liquid nitrogen pipeline is installed in the heat exchange tube, a plurality of signal receivers and transmitters are installed on the outer wall of the fractionation tower, the signal receivers and transmitters pass through the wall of the fractionation tower and are connected to the liquid nitrogen pipeline with a sensor probe, a liquid nitrogen inlet is provided above an outer wall of the fractionation tower, the liquid nitrogen inlet passes through the wall of the fractionation tower and is connected to the liquid nitrogen pipeline at the top. A material inlet is installed on one side wall of the fractionation tower, the material inlet passes through the wall of the fractionation tower and is connected to the inside of the fractionation tower, a liquid xenon outlet is provided at the bottom of the fractionation tower, a krypton gas outlet is provided at the top of the fractionation tower, a gas-liquid separator base is installed at the top of the fractionation tower, and a gas-liquid separator is installed in the gas-liquid separator base.

[0007] Preferably, the heat exchange tube is fixedly installed on the inner wall surface of the distillation tower using a spiral structure.

[0008] Preferably, the bottom end of the liquid nitrogen pipeline passes through the wall of the distillation tower and is connected to a reflux pipe.

[0009] Preferably, a vacuum insulation layer is provided inside the side wall surface of the distillation tower, and a heat preservation layer is installed on the outer wall surface of the distillation tower.

[0010] Preferably, the material liquid inlet is located between the heat exchange tubes.

[0011] Beneficial Effects

[0012] The utility model provides a krypton-xenon gas screening fractionation tower, which has the following beneficial effects: when the device is in use, each section of the heat exchange tube inside the fractionation tower can be monitored, which is convenient for adjusting the temperature inside the fractionation tower, and is beneficial for improving the separation of krypton gas and liquid xenon. A gas-liquid separator is arranged on the top of the tower to improve the purity of the krypton gas at the krypton gas outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a krypton-xenon gas screening and fractionation tower described in the utility model.

[0014] In the figure: 1. Distillation tower; 2. Heat exchange tube; 3. Liquid nitrogen pipeline; 4. Signal receiver and transmitter; 5. Sensor probe; 6. Liquid nitrogen inlet; 7. Material inlet; 8. Gas-liquid separator base; 9. Gas-liquid separator; 10. Krypton gas outlet; 11. Liquid xenon outlet. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1 The utility model provides a technical solution for a krypton-xenon gas screening and fractionation tower: a krypton-xenon gas screening and fractionation tower, comprising a fractionation tower 1, a heat exchange tube 2 is arranged in the fractionation tower 1, a liquid nitrogen pipeline 3 is installed in the heat exchange tube 2, a plurality of signal receivers and transmitters 4 are installed on the outer wall of the fractionation tower 1, the signal receivers and transmitters 4 pass through the wall of the fractionation tower 1 and are connected to the liquid nitrogen pipeline 3 with a sensor probe 5, a liquid nitrogen inlet 6 is arranged above an outer wall of the fractionation tower 1, and the liquid nitrogen inlet 6 passes through the wall of the fractionation tower 1 and is connected to the liquid nitrogen pipeline 3 at the top. A material inlet 7 is installed on one side wall of the fractionation tower 1, and the material inlet 7 passes through the wall of the fractionation tower 1 and is connected to the inside of the fractionation tower 1, a liquid xenon outlet 11 is arranged at the bottom of the fractionation tower 1, a krypton gas outlet 10 is arranged at the top of the fractionation tower 1, a gas-liquid separator base 8 is installed at the top of the fractionation tower 1, and a gas-liquid separator 9 is installed in the gas-liquid separator base 8.

[0017] Furthermore, the heat exchange tube 2 is fixedly installed on the inner wall surface of the distillation tower 1 using a spiral structure.

[0018] Furthermore, the bottom end of the liquid nitrogen pipeline 3 passes through the wall of the distillation tower 1 and is connected to a reflux pipe.

[0019] Furthermore, a vacuum insulation layer is provided inside the side wall of the fractionation tower 1 , and a heat preservation layer is installed on the outer wall of the fractionation tower 1 .

[0020] Furthermore, the material liquid inlet 7 is located between the heat exchange tubes 2 .

[0021] Embodiment: When the device is in use, liquid nitrogen is introduced into the liquid nitrogen pipeline 3 through the liquid nitrogen inlet 6. The liquid nitrogen circulates in the liquid nitrogen pipeline 3 to cool the interior of the distillation tower 1. The sensor probe 5 can detect the temperature and flow rate of the liquid nitrogen in the liquid nitrogen pipeline 3, which is convenient for observation.

[0022] After the material is injected into the fractionation tower 1 through the material liquid inlet 7, it is fractionated at a certain temperature, and the pure krypton-xenon concentrate is separated into krypton and xenon components. The gaseous krypton at the top of the tower is separated into gas and liquid by the gas-liquid separator 9 and then sent to the pure krypton tower, where carbon tetrafluoride is removed to obtain pure liquid krypton, while other impure components remain in the liquid at the bottom of the tower. At the same time, liquid xenon is continuously extracted from the bottom of the krypton-xenon separation tower and continuously sent to the crude xenon tower.

[0023] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A krypton-xenon gas screening and fractionation tower, comprising a fractionation tower (1), It is characterized in that The fractionating tower (1) is provided with a heat exchange tube (2), a liquid nitrogen pipeline (3) is installed in the heat exchange tube (2), a plurality of signal receivers (4) are installed on the outer wall of the fractionating tower (1), the signal receivers (4) pass through the wall of the fractionating tower (1) and are connected to a sensor probe (5) in the liquid nitrogen pipeline (3), a liquid nitrogen inlet (6) is provided above an outer wall of the fractionating tower (1), the liquid nitrogen inlet (6) passes through the wall of the fractionating tower (1) and is connected to the top of the liquid nitrogen pipeline (3). The fractionating tower (1) is connected to the liquid nitrogen pipeline (3); a material liquid inlet (7) is installed on one side wall of the fractionating tower (1); the material liquid inlet (7) passes through the wall of the fractionating tower (1) and is connected to the inside of the fractionating tower (1); a liquid xenon outlet (11) is provided at the bottom of the fractionating tower (1); a krypton gas outlet (10) is provided at the top of the fractionating tower (1); a gas-liquid separator base (8) is installed at the top of the fractionating tower (1); a gas-liquid separator (9) is installed in the gas-liquid separator base (8).

2. A krypton-xenon gas screening and fractionation tower according to claim 1, It is characterized in that The heat exchange tube (2) is fixedly installed on the inner wall surface of the fractionation tower (1) using a spiral structure.

3. A krypton-xenon gas screening and fractionation tower according to claim 1, It is characterized in that The bottom end of the liquid nitrogen pipeline (3) passes through the wall of the fractionation tower (1) and is connected to a reflux pipe.

4. A krypton-xenon gas screening and fractionation tower according to claim 1, It is characterized in that A vacuum insulation layer is provided inside the side wall of the fractionation tower (1), and a heat preservation layer is installed on the outer wall of the fractionation tower (1).

5. The krypton-xenon gas screening and fractionation tower according to claim 1, It is characterized in that The material liquid inlet (7) is located between the heat exchange tubes (2).

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