Krypton gas separation compound and preparation method thereof

Abstract

The invention provides a krypton gas separation compound and a preparation method thereof, and relates to the field of krypton gas separation. The krypton gas separation method comprises the following specific preparation methods: step 1, air pretreatment: adopting an impurity pretreatment device for pretreatment; step 2, air compression: the treated air is pressurized through a compressor, and the compressor is pressurized to a high-pressure state so as to improve the subsequent separation efficiency and ensure that the air is clean and dry; 3, the air pretreated in the membrane separation process enters a membrane separation device, and a membrane material selectively separates krypton gas and other gases such as nitrogen and oxygen according to the difference of the permeation rate of the krypton gas and the permeation rate of the other gases. Through the arrangement of the spiral water tank, the sponge ring and the filtering film layer, moisture of moisture is centrifugally discharged through the spiral water tank, impurities are adsorbed through the sponge ring, secondary filtering operation is achieved through the filtering film layer, krypton gas is in a sealed and closed state in the whole process, and the separation safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of krypton gas separation, and specifically to a krypton gas separation compound and a preparation method thereof. Background Art

[0002] Krypton gas is an inert gas and is indispensable in the fields of medicine, industry, and scientific research. There is abundant krypton gas in the atmosphere, with 1 mL of krypton in every 1 m3 of air, but its separation is relatively difficult. Currently, the following five methods are mostly used: 1. Air separation method: Compress and expand the air for refrigeration, then remove moisture, impurities, etc. in the air. The air is cooled and liquefied through heat exchange, and then air rectification and separation are carried out, and the cold energy of the low-temperature products is recovered and compressed; 2. Synthesis ammonia tail gas separation method: Krypton and xenon mixed gas is by-produced in the argon extraction process of synthesis ammonia tail gas, and 99% krypton gas can be obtained through rectification, washing, deoxidation, adsorption, and desorption; 3. Nuclear reactor waste gas separation method: Comprehensively utilize radioactive Kr85 in the cracked waste gas of nuclear reactors; 4. The industrial method also uses Freon solvent absorption method; 5. Split liquid air method: Prepared by fractionating liquid air from the air.

[0003] In the separation process of krypton gas in the prior art, it is necessary to keep the gas in a high-purity state. However, the traditional method is to separate impurities and water vapor in the air through filtration, but the separation is not thorough, and multiple treatment operations are required. At the same time, the water vapor in the separated air is not easy to discharge, resulting in the need for additional heat treatment of the water vapor, leading to an increase in operating costs and inconvenience in use. Summary of the Invention

[0004] (1) Technical problems to be solved

[0005] In view of the deficiencies of the prior art, the present invention provides a krypton gas separation compound and a preparation method thereof, which solve the problems that the air separation is not thorough, multiple treatment operations are required, and the water vapor in the separated air is not easy to discharge, resulting in the need for additional heat treatment of the water vapor, leading to an increase in operating costs.

[0006] (2) Technical solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A krypton gas separation method includes the following specific preparation methods:

[0008] Step 1: Air pretreatment

[0009] Perform pretreatment using an impurity pretreatment device;

[0010] Step 2: Air compression

[0011] Pressurize the treated air through a compressor. The compressor pressurizes to a high-pressure state to improve the subsequent separation efficiency and ensure that the air is clean and dry;

[0012] Step 3: Membrane separation process

[0013] The pretreated air enters the membrane separation device. The membrane material selectively separates based on the difference in the permeation rates of krypton gas and other gases such as nitrogen and oxygen. Due to its molecular size and polarity characteristics, krypton gas is captured and enriched by the membrane;

[0014] Step 4: Krypton gas collection and purification

[0015] The enriched krypton gas is extracted from the membrane separation device and further purified by adsorption or cryogenic distillation methods to obtain high-purity krypton gas. Purity detection is required to obtain krypton gas with a high concentration;

[0016] Step 5: Storage and transportation

[0017] The purified krypton gas is compressed and stored in a high-pressure container for easy storage and transportation.

[0018] The impurity pretreatment device includes a centrifugal separator and a top cover. A separation tank is provided in the middle inside the centrifugal separator. A spiral water tank is provided below the inner wall of the separation tank. The top of the centrifugal separator is threadedly connected with the top cover. A driving motor is fixedly connected to the middle of the top of the top cover. The driving end of the driving motor is fixedly connected with a rotating shaft. The bottom end of the rotating shaft is fixedly connected with a centrifugal disc. The bottom end of the centrifugal disc is fixedly connected with arc-shaped fan blades. A plug-in slot is provided on the inner wall of the centrifugal separator. A limiting ring is provided above the plug-in slot. A sponge ring is inserted into the plug-in slot. The middle of the bottom end of the centrifugal separator is fixedly connected with an air inlet pipe.

[0019] Preferably, the inclined end of the spiral water tank is fixedly connected with an inclined water outlet pipe, and the end of the inclined water outlet pipe away from the centrifugal separator is threadedly connected with a collecting threaded tank.

[0020] Preferably, an upper support inner ring is fixedly connected to the top end inner wall of the centrifugal separator, and a filter membrane layer abuts above the upper support inner ring.

[0021] Preferably, branch pipes are fixedly connected to both sides of the top of the top cover. A circulation main pipe is fixedly connected between the branch pipes. An electrostatic adsorption inductor is provided on one side of the middle of the circulation main pipe. A return pipe is fixedly connected between the bottom end side of the electrostatic adsorption inductor and the circulation main pipe. The end of the return pipe away from the electrostatic adsorption inductor is fixedly connected with the air inlet pipe. Solenoid valves are provided above the middle of the return pipe and at one end of the circulation main pipe.

[0022] Preferably, a lower support inner ring is fixedly connected to the middle of the inner wall of the centrifugal separator. A plurality of support plates are fixedly connected to the outer side walls between the lower support inner ring and the limiting ring. A display panel is fixedly connected to the front side of the centrifugal separator.

[0023] Preferably, the pressure range of air compression in step 2 is 0.6 MPa to 1.6 MPa.

[0024] A krypton gas separation method is applied to krypton gas separation compounds.

[0025] (III) Beneficial effects

[0026] The present invention provides a krypton gas separation compound and a preparation method thereof. The following beneficial effects are achieved:

[0027] 1. In the present invention, there are provided: a driving motor, a rotating shaft and a centrifugal disk. Driven by the driving motor, the rotating shaft is driven to rotate, and the centrifugal disk at the bottom end is driven to rotate at a high speed by the rotating shaft. During the rotation process, the introduced gas is rotated at a high speed. Through centrifugal action, water vapor and impurities are centrifugally dispersed outward. Through this structure, the centrifugal dispersion of the gas to the outside can be realized, the centrifugal discharge of impurities and water vapor is improved, and the krypton gas separation efficiency is increased.

[0028] 2. In the present invention, there are provided: a circulation main pipe, an electrostatic adsorption inductor, a solenoid valve and a return pipe. During the discharge process of the circulation main pipe, the electrostatic adsorption inductor can perform electrostatic adsorption on impurities. When the electrostatic adsorption inductor adsorbs impurities, it can send a signal to the controller. After the controller receives the signal, it indicates that the gas treatment is unqualified, and a signal will be sent to the solenoid valve. Subsequently, the solenoid valve at the end of the circulation main pipe closes, and at this time, the gas will flow back to the intake pipe through the return pipe and be centrifugally separated again. Only when the electrostatic adsorption sensor does not adsorb impurities can the air circulation be facilitated. Through this structure, it can be ensured that the circulated gas is pure, the operation efficiency is high, and the air separation efficiency is reduced.

[0029] 3. In the present invention, there are provided: a spiral water tank, a sponge ring and a filter membrane layer. The spiral water tank centrifugally discharges the water of the moisture, the sponge ring adsorbs impurities, and the filter membrane layer performs a re-filtering operation. Through this multi-treatment step, the treatment of impurities can be facilitated, and the collected impurities and water vapor can be conveniently collected and uniformly treated. Description of the drawings

[0030] Figure 1 It is a front cross-sectional view of a centrifugal separator for a krypton gas separation compound and a preparation method thereof proposed by the present invention;

[0031] Figure 2 It is a split structure diagram of a centrifugal separator and a top cover for a krypton gas separation compound and a preparation method thereof proposed by the present invention;

[0032] Figure 3 It is an enlarged split structure diagram of a sponge ring and a plug-in groove for a krypton gas separation compound and a preparation method thereof proposed by the present invention;

[0033] Figure 4 Proposed by the present invention Figure 1 The enlarged view at position A in

[0034] Among them, 1. Centrifugal separator; 2. Top cover; 3. Branch pipe; 4. Driving motor; 5. Circulation main pipe; 6. Air inlet pipe; 7. Filter membrane layer; 8. Upper support inner ring; 9. Display panel; 10. Outlet inclined pipe; 11. Collection threaded tank; 12. Sponge ring; 13. Limit ring; 14. Lower support inner ring; 15. Insertion slot; 16. Support plate; 17. Rotating shaft; 18. Centrifugal disc; 19. Separation tank; 20. Spiral water tank; 21. Arc-shaped fan blade; 22. Electrostatic adsorption inductor; 23. Solenoid valve; 24. Return pipe. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment:

[0037] As Figures 1-4 shown, the embodiment of the present invention provides a krypton gas separation method, including the following specific preparation methods:

[0038] Step 1: Air pretreatment

[0039] Perform pretreatment using an impurity pretreatment device. The collected air is circulated through the air inlet pipe 6 into the gas centrifugal separator 1. First, it is driven by the driving motor 4. After driving, the rotating shaft 17 is driven to rotate. The centrifugal disc 18 at the bottom is driven by the rotating shaft 17 to rotate at a high speed. During the rotation process, the introduced gas is rotated at a high speed. Through centrifugal action, water vapor and impurities are centrifugally dispersed outward. At this time, the separation tank 19 opened in the middle of the inner wall of the centrifugal separator 1 can collect the water source. The water source adheres to the inner wall of the centrifugal separator 1 and falls into the spiral water tank 20 under the action of gravity after leaving the centrifugal driving force. It is discharged to the outlet inclined pipe 10 through the spiral and flows into the inside of the collection threaded tank 11 for convenient collection of the water source. Subsequently, the centrifugal force of the impurities outward adheres to the inner wall of the sponge ring 12, which can preliminarily separate water vapor and impurities from the gas. The separated gas is filtered again through the filter membrane layer 7, and finally flows through the branch pipe 3 to the circulation main pipe 5 and is discharged to the air compression process. The krypton gas is in a sealed and closed state throughout the process, increasing the safety of separation;

[0040] Step 2: Air compression

[0041] Pressurize the processed air through a compressor to a high-pressure state to improve subsequent separation efficiency and ensure that the air is clean and dry. The pressure range for air compression is from 0.6 MPa to 1.6 MPa.

[0042] Step 3: Membrane separation process

[0043] The pretreated air enters the membrane separation device. The membrane material selectively separates based on the difference in the permeation rates of krypton gas and other gases such as nitrogen and oxygen. Due to its molecular size and polarity characteristics, krypton gas is captured and enriched by the membrane.

[0044] Step 4: Krypton gas collection and purification

[0045] Extract the enriched krypton gas from the membrane separation device and further purify it by adsorption or cryogenic distillation methods to obtain high-purity krypton gas. Purity detection is required to obtain high-concentration krypton gas.

[0046] Step 5: Storage and transportation

[0047] The purified krypton gas is compressed and stored in a high-pressure container for easy storage and transportation.

[0048] A krypton gas separation method is applied to krypton gas separation compounds.

[0049] Example 2:

[0050] The differences between this embodiment and the first embodiment are as follows: The impurity pretreatment device includes a centrifugal separator 1 and a top cover 2. A separation tank 19 is provided in the middle inside the centrifugal separator 1. Through centrifugal action, water vapor and impurities are centrifugally dispersed outward. At this time, the separation tank 19 provided in the middle of the inner wall of the centrifugal separator 1 can collect the water source. A spiral water tank 20 is provided below the inner wall of the separation tank 19. The water source adheres to the inner wall of the centrifugal separator 1 and drops into the spiral water tank 20 under the action of gravity after leaving the centrifugal driving force. The top of the centrifugal separator 1 is threadedly connected with a top cover 2. In the middle of the top of the top cover 2, a driving motor 4 is fixedly connected. Driven by the driving motor 4, the rotating shaft 17 is driven to rotate, and the centrifugal disc 18 at the bottom is driven to rotate at high speed through the rotating shaft 17. During the rotation process, the introduced gas is rotated at high speed. The driving end of the driving motor 4 is fixedly connected with a rotating shaft 17. The bottom of the rotating shaft 17 is fixedly connected with a centrifugal disc 18. The bottom of the centrifugal disc 18 is fixedly connected with an arc-shaped fan blade 21. An insertion slot 15 is provided on the inner wall of the centrifugal separator 1. A limiting ring 13 is provided above the insertion slot 15. A sponge ring 12 is inserted into the insertion slot 15. The centrifugal force of the impurities outward adheres to the inner wall of the sponge ring 12, and the water vapor and impurities can be preliminarily separated from the gas. In the middle of the bottom of the centrifugal separator 1, an air inlet pipe 6 is fixedly connected. The collected air is circulated into the gas centrifugal separator 1 through the air inlet pipe 6. The inclined end of the spiral water tank 20 is fixedly connected with a water outlet inclined pipe 10. The end of the water outlet inclined pipe 10 away from the centrifugal separator 1 is threadedly connected with a collecting threaded tank 11. It is discharged to the water outlet inclined pipe 10 through the spiral and flows into the inside of the collecting threaded tank 11, which is convenient for collecting the water source. The inner wall top of the centrifugal separator 1 is fixedly connected with an upper support inner ring 8. A filter membrane layer 7 abuts above the upper support inner ring 8. The separated gas is filtered again through the filter membrane layer 7, and finally flows through the branch pipe 3 to the circulation main pipe 5 and is discharged into the air compression process. On both sides of the top of the top cover 2, branch pipes 3 are fixedly connected. A circulation main pipe 5 is fixedly connected between the branch pipes 3. On one side in the middle of the circulation main pipe 5, an electrostatic adsorption sensor 22 is provided. During the discharge process of the circulation main pipe 5, the electrostatic adsorption sensor 22 can perform electrostatic adsorption on impurities. When the electrostatic adsorption sensor 22 adsorbs impurities, it can send a signal to the controller. Only when the electrostatic adsorption sensor 22 does not adsorb impurities can the air flow smoothly. Between the bottom side of the electrostatic adsorption sensor 22 and the circulation main pipe 5, a return pipe 24 is fixedly connected. The end of the return pipe 24 away from the electrostatic adsorption sensor 22 is fixedly connected with the air inlet pipe 6. Above the middle of the return pipe 24 and one end of the circulation main pipe 5, electromagnetic valves 23 are provided. The electromagnetic valve 23 at the end of the circulation main pipe 5 is closed. At this time, the gas will flow back to the air inlet pipe 6 through the return pipe 24 and be centrifugally separated again. In the middle of the inner wall of the centrifugal separator 1, a lower support inner ring 14 is fixedly connected. A plurality of support plates 16 are fixedly connected to the outer side walls between the lower support inner ring 14 and the limiting ring 13. A display panel 9 is fixedly connected to the front side of the centrifugal separator 1.

[0051] Working principle: When in use, the collected air first flows through the intake pipe 6 into the gas centrifugal separator 1. Driven by the driving motor 4, the driving motor drives the rotation of the rotating shaft 17. The rotating shaft 17 drives the centrifugal disk 18 at the bottom to rotate at high speed. During the rotation process, the introduced gas is rotated at high speed. Through the centrifugal force, the water vapor and impurities are centrifugally dispersed outward. At this time, the separation groove 19 opened in the middle of the inner wall of the centrifugal separator 1 can collect the water source. The water source adheres to the inner wall of the centrifugal separator 1 and falls into the spiral water groove 20 under the action of gravity after leaving the centrifugal driving force. It is discharged to the water outlet inclined pipe 10 through the spiral and flows into the interior of the collecting threaded tank 11, which is convenient for collecting the water source. Subsequently, the centrifugal force of the impurities outward adheres to the inner wall of the sponge ring 12, which can preliminarily separate the water vapor and impurities from the gas. The separated gas is filtered again through the filter membrane layer 7 and finally discharged into the air compression process through the branch pipe 3 to the circulation main pipe 5; during the discharge process of the circulation main pipe 5, the electrostatic adsorption sensor 22 can perform electrostatic adsorption on the impurities. When the electrostatic adsorption sensor 22 adsorbs the impurities, it can send a signal to the controller. After the controller receives the signal, it indicates that the gas treatment is unqualified and will send a signal to the solenoid valve 23. Subsequently, the solenoid valve 23 at the end of the circulation main pipe 5 closes, and the gas at this time will flow back to the intake pipe 6 through the return pipe 24 for centrifugal separation again. Only when the electrostatic adsorption sensor 22 has no impurity adsorption can the air flow smoothly.

[0052] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A krypton gas separation method, characterized in that: The invention comprises the following specific preparation methods: Step 1: Air Pretreatment Using impurity pretreatment device for pretreatment; Step 2: Air compression The treated air is pressurized by a compressor, which pressurizes it to a high pressure state to improve the subsequent separation efficiency and ensure that the air is clean and dry; Step 3: Membrane separation process The pretreated air enters the membrane separation device. The membrane material selectively separates krypton gas and other gases such as nitrogen and oxygen based on the difference in permeation rate. Krypton gas is captured and enriched by the membrane due to its molecular size and polarity. Step 4: Krypton gas collection and purification Extract the enriched krypton gas from the membrane separation device, and further purify it by adsorption or cryogenic distillation to obtain high-purity krypton gas. The high-concentration krypton gas needs to be tested for purity; Step 5: Storage and transportation The purified krypton gas is compressed and stored in high-pressure containers for easy storage and transportation; The impurity pretreatment device comprises a centrifugal separator (1), wherein a separation groove (19) is provided in the middle of the interior of the centrifugal separator (1), a spiral water groove (20) is provided below the inner wall of the separation groove (19), a top cover (2) is threadedly connected to the top of the centrifugal separator (1), a driving motor (4) is fixedly connected to the middle of the top of the top cover (2), a driving end of the driving motor (4) is fixedly connected to a rotating shaft (17), a centrifugal disc (18) is fixedly connected to the bottom end of the rotating shaft (17), an arc-shaped fan blade (21) is fixedly connected to the bottom end of the centrifugal disc (18), a plug-in groove (15) is provided on the inner wall of the centrifugal separator (1), a limit ring (13) is provided above the plug-in groove (15), a sponge ring (12) is plugged into the inside of the plug-in groove (15), and an air intake pipe (6) is fixedly connected to the middle of the bottom end of the centrifugal separator (1).

2. A krypton gas separation method according to claim 1, characterized in that: The inclined end of the spiral water trough (20) is fixedly connected to a water outlet inclined pipe (10), and one end of the water outlet inclined pipe (10) away from the centrifugal separator (1) is threadedly connected to a collecting threaded tank (11).

3. A krypton gas separation method according to claim 1, characterized in that: An upper support inner ring (8) is fixedly connected to the top of the inner wall of the centrifugal separator (1), and a filter membrane layer (7) is in contact with the upper side of the upper support inner ring (8).

4. A krypton gas separation method according to claim 1, characterized in that: Branch pipes (3) are fixedly connected to both sides of the top of the top cover (2), a circulation main pipe (5) is fixedly connected between the branch pipes (3), an electrostatic adsorption sensor (22) is arranged on one side of the middle of the circulation main pipe (5), a return pipe (24) is fixedly connected between one side of the bottom end of the electrostatic adsorption sensor (22) and the circulation main pipe (5), one end of the return pipe (24) away from the electrostatic adsorption sensor (22) is fixedly connected to the intake pipe (6), and a solenoid valve (23) is arranged on the upper middle of the return pipe (24) and one end of the circulation main pipe (5).

5. A krypton gas separation method according to claim 1, characterized in that: A lower support inner ring (14) is fixedly connected to the inner wall of the centrifugal separator (1), a plurality of support plates (16) are fixedly connected to the outer wall between the lower support inner ring (14) and the limiting ring (13), and a display panel (9) is fixedly connected to the front side of the centrifugal separator (1).

6. A krypton gas separation method according to claim 1, characterized in that: The pressure range of the air compression in step 2 is 0.6 MPa to 1.6 MPa.

7. A krypton gas separation method, applied to separating compounds from krypton gas.

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