CN208200388U - The removing means of trace methane in a kind of krypton xenon gaseous mixture - Google Patents
The removing means of trace methane in a kind of krypton xenon gaseous mixture Download PDFInfo
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- CN208200388U CN208200388U CN201820612435.5U CN201820612435U CN208200388U CN 208200388 U CN208200388 U CN 208200388U CN 201820612435 U CN201820612435 U CN 201820612435U CN 208200388 U CN208200388 U CN 208200388U
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Abstract
The utility model discloses a kind of removing means of trace methane in krypton xenon gaseous mixture, including the first purification pipe, the second purification pipe, the first connecting tube, the second connecting tube and third connecting tube；The first valve is provided in first connecting tube；Concatenated second valve and third valve are provided in second connecting tube；It is provided with the first bypass branch being connected to the second connecting tube between second valve and third valve, is provided with the 4th valve in the first bypass branch；The 5th valve is provided in third connecting tube；Demethanation catalyst is filled in first purification pipe；The first adsorption layer and the second adsorption layer comprising molecular sieve that filling bag contains deoxidier in second purification pipe.The trace methane in krypton xenon mixed gas can be effectively removed using the device of the utility model, it is difficult to solve methane removing in the prior art, it is difficult to the problem of preparing high-purity special gas.
Description
Technical field
The utility model relates to a kind of cleaning equipment, in particular to the removing dress of trace methane in a kind of krypton xenon gaseous mixture
It sets.
Background technique
The rare gas such as xenon, which are mainly derived from the liquid oxygen of air separating method, to be extracted, due to the boiling point (- 153.4 of Krypton
DEG C) with the boiling point (- 161.5 DEG C) of methane closely, when using rare gas such as cryogenic separation krypton, xenons, operating procedure
It varies slightly, it is easy to make to bring trace methane gas in Krypton into.The Krypton quality of finished product is examined using gas-chromatography
Method, Krypton and methane chromatographic peak are very close, and methane peak is easy to be covered by Krypton main peak and judge by accident, and methane is be easy to cause to contain
It measures exceeded Krypton to dispatch from the factory, uses underproof Krypton and xenon without special quality control method again in user's use process
The high-purity gas such as gas are configured to just find that methane content is exceeded after Special gas mixture body.
Methane content is very low in the high-purity gas such as the nitrogen and oxygen of air separating method production, rarely has removing trace methane
Method and technique.
Utility model content
Purpose of utility model: the utility model provides a kind of removing means of trace methane in krypton xenon gaseous mixture, the dress
It sets and is able to solve methane in krypton xenon gaseous mixture and is difficult to the problem of removing.
Technical solution: the removing means of trace methane in a kind of krypton xenon gaseous mixture described in the utility model, including first is net
Change pipe, the second purification pipe, the first connecting tube of pipe air inlet connection is purified with first, connect the first purification pipe gas outlet and second
The third connecting tube for purifying the second connecting tube of pipe air inlet and being connected to the second purification pipe gas outlet；First connecting tube
On be provided with the first valve；Concatenated second valve and third valve are provided in second connecting tube；Second valve
It is provided with the first bypass branch being connected to the second connecting tube between third valve, is provided in first bypass branch
Four valves；The 5th valve is provided in the third connecting tube；Demethanation catalyst is filled in the first purification pipe；It is described
The first adsorption layer and the second adsorption layer comprising molecular sieve that filling bag contains deoxidier in second purification pipe.
Further, for the ease of the access of gas with various, the first purification pipe is handled, in the first purification pipe
Air inlet is connected with the second bypass branch；It is provided with the 6th valve in second bypass branch, utilizes the 6th valve control the
Two bypass branch turn off or on.
Further, in order to enable the first purification pipe and the gas system of the second purification pipe access separate, described second
It is provided with the third bypass branch being connected to the second connecting tube between valve and third valve, is provided in third bypass branch
Seven valves, the 7th valve is for controlling opening or closing for third bypass branch.
Second purification pipe gas outlet is communicated with the 4th bypass branch；The 8th valve is provided in 4th bypass branch
Door, when the 4th bypass branch is as pre-processing, the access of gas.
The demethanation catalyst is 506TJW type catalyst, and the action principle of this kind of catalyst is when unstripped gas is by urging
When agent, hydro carbons and methane impurities and oxygen conversion reaction in gas generate water and carbon dioxide, have both reached purification purpose.
The deoxidier is the efficient deoxidation adsorbent of PEE type, and deoxidier main component is Mn to this kind of deoxidation adsorbent thus
Type low oxide forms high oxide after oxygen uptake, then logical hydrogen reduction restores deoxy activity at low oxide again.
The molecular sieve is 5A type molecular sieve, and the molecular sieve main function in the second adsorption layer is to adsorb carbon dioxide
And water, when the absorption partial size of molecular sieve is 5A, adsorption effect is best.
The first adsorption layer is located at the second purification pipe air inlet；Second adsorption layer is located at the second purification pipe outlet
Mouthful.
The first adsorption layer and the volume ratio of the second adsorption layer are 1:1.
Using in above-mentioned krypton xenon gaseous mixture trace methane removing means carry out trace methane removing method, comprising with
Lower step: (1) pretreatment of the first purification pipe: opening the first valve, the second valve and the 4th valve, closes third valve and the
First purification tube temperature degree is warming up to 300-350 DEG C by five valves, and being passed through flow from the first bypass branch is 4-5L.The oxygen of min
Gas, being passed through the time is 20-24h, after oxygen is passed through, nitrogen is passed through from the first bypass branch and is blown the first purification pipe
It sweeps, purge time 6-8h；The pretreatment of (2) second purification pipes: closing the first valve and the second valve, open third valve and
5th valve, the second purification pipe are warming up to 300-350 DEG C, hydrogen, hydrogen flowing quantity 4-5L/ are passed through from the first bypass branch
Min, entering the hydrogen time all is 40-48h, then accesses nitrogen by the first bypass branch and purges to the second purification pipe,
Purge time is 6-8h；(3) demethanation is handled: being closed the 4th valve, the first valve and the second valve is opened, by krypton xenon gaseous mixture
Enter the first purification pipe from the first connecting tube, then passes through the second connecting tube into the second purification pipe, by the second purification Guan Jing
The krypton xenon gaseous mixture of change, flows out from third connecting tube；(4) it monitors: when from the krypton xenon gaseous mixture flowed out in third connecting tube
Methane be more than 1ppm, stop krypton xenon gaseous mixture and be passed through, managed according to the first purification of step (1) processing, oxygen is passed through the time and is
1-2h, purge time 30-60min；When excessively high from the carbon dioxide content in the krypton xenon gaseous mixture flowed out in third connecting tube
When, stop krypton xenon gaseous mixture and be passed through, managed according to the second purification of step (2) processing, the time that hydrogen is passed through is 1-2h, when purging
Between be 30-60min.
Oxygen, hydrogen and the nitrogen is high-purity gas.
Another structure of the removing means of trace methane in above-mentioned krypton xenon gaseous mixture, including the first purification pipe, second
Purification pipe, pipe-line system；
Demethanation catalyst is filled in the first purification pipe；
The first adsorption layer and the second adsorption layer comprising molecular sieve that filling bag contains deoxidier in the second purification pipe.
The pipe-line system includes the first connecting tube being connected to the first purification pipe air inlet, connect the first purification pipe outlet
Mouth and second purifies the second connecting tube of pipe air inlet and purifies the third connecting tube that pipe gas outlet is connected to second；Described
The first valve is provided in one connecting tube；Concatenated second valve and third valve are provided in second connecting tube；It is described
The 5th valve is provided in third connecting tube；
Be provided between second valve and third valve the first bypass branch being connected to respectively with the second connecting tube and
Third bypass branch is provided with the 4th valve in first bypass branch, is provided with the 7th valve in the third bypass branch
Door；The first purification pipe air inlet is equipped with the second bypass branch, is provided with the 6th valve in second bypass branch；It is described
Second purification pipe outlet is connected with the 4th bypass branch, is provided with the 8th valve in the 4th bypass branch.
The utility model has the advantages that (1) the utility model is used in combination by the first purification pipe and the second purification pipe, krypton xenon can be mixed
Trace methane in gas efficiently removes, and will not introduce other impurities gas；(2) the utility model is by reasonably utilizing and the
The connecting tube that one purification pipe is connected to the second purification pipe is handled the first purification pipe and the second purification pipe to effective；
(3) the removing methanation catalyst elimination effect added in the first purification pipe of the utility model is excellent；(4) second purification Guan Zhongtong
When deoxidier and molecular sieve is added, further to mixed gas purification, purification device is simple, and clean-up effect is excellent.
Detailed description of the invention
Fig. 1 is 1 structural schematic diagram of embodiment；
Fig. 2 is 2 structural schematic diagram of embodiment.
Specific embodiment
The utility model is further illustrated with reference to the accompanying drawing.
Embodiment 1: as shown in Figure 1, in a kind of krypton xenon gaseous mixture described in the utility model trace methane removing means, packet
Pipe 2 and pipeline system and valve system are purified containing the first purification pipe 1, second；Being filled with partial size in first purification pipe 1 is 2-3mm
506TJW type demethanation catalyst, second purification pipe 2 close to second purification pipe air inlet at be first adsorption layer 21, first
Adsorption layer 21 is the efficient deoxidation adsorbent of PEE type；It is the second adsorption layer 22 at second purification pipe gas outlet, the second adsorption layer has 5A
The volume ratio of molecular sieve composition, first adsorption layer 21 and the second adsorption layer 22 is 1:1.
The pipeline system and valve system of the removing means include the first connecting tube being connected to the first purification pipe air inlet
31, the second connecting tube 32 and the second purification pipe gas outlet of the first purification pipe gas outlet of connection and the second purification pipe air inlet connect
Logical third connecting tube 33 is provided with the first valve 41 in first connecting tube, concatenated second valve is provided in the second connecting tube
Door 42 and third valve 43；The first bypass branch being connected to the second connecting tube is provided between second valve 42 and third valve 43
Pipe 51 is provided with the 4th valve 44 in first bypass branch, the 5th valve 45 is provided in third connecting tube.
It is as follows that trace methane removal methods are carried out using the methane removing means of embodiment 1:
Step 1:
The pretreatment of first purification pipe 1: the first valve 41, the second valve 42 and the 4th valve 44 are opened, third valve is closed
First purification 1 temperature of pipe is warming up to 300-350 DEG C by door 43 and the 5th valve 45, and being passed through flow from the first bypass branch 51 is
The oxygen of 4-5L/min, being passed through the time is 20-24h, after oxygen is passed through, is passed through nitrogen pair from the first bypass branch 51
First purification pipe is purged, purge time 6-8h；Band first purifies pipe 1 and is down to room temperature, carries out step 2.
Step 2:
The pretreatment of second purification pipe 2: the first valve 41 and the second valve 42 are closed, third valve 43 and the 5th valve are opened
Door 45, the second purification pipe 2 are warming up to 300-350 DEG C, hydrogen, hydrogen flowing quantity 4-5L/ are passed through from the first bypass branch 51
Min, being passed through the hydrogen time is 40-48h, then accesses nitrogen by the first bypass branch 51 and purges to the second purification pipe 2,
Purge time is 6-8h；It is down to room temperature to the second purification pipe, carries out step 3.
Step 3:
Demethanation processing: closing the 4th valve 44, opens the first valve 41 and the second valve 42, by krypton xenon gaseous mixture from the
One connecting tube 31 is with 2000-20000hr-1Air speed is passed through into the first purification pipe, then passes through the second connecting tube 32 into second
Pipe 2 is purified, by the krypton xenon gaseous mixture that the second purification pipe 2 purifies, is flowed out from third connecting tube 33；
Step 4:
Monitoring: when being more than 1ppm from the methane in the krypton xenon gaseous mixture flowed out in third connecting tube 33, stop the mixing of krypton xenon
Gas is passed through, and according to step 1 processing the first purification pipe 1, oxygen is passed through the time as 1-2h, purge time 30-60min；When from
(preset threshold is according to client when the carbon dioxide content in krypton xenon gaseous mixture flowed out in third connecting tube 33 is more than preset threshold
The product standard of demand determines that the range as preset threshold is chosen can be 0.1-1ppm), stop being passed through for krypton xenon gaseous mixture, presses
According to step 2 processing the second purification pipe 2, the time that hydrogen is passed through is 1-2h, purge time 30-60min.
Certain gas flow rate is controlled, the effect of demethanation also changes, and increases with gaseous mixture air speed is passed through, processing
Amount increases, and the residual concentration of methane removing increases；Air speed reduces, and the residual concentration of methane reduces, and general control is remained in methane
Amount≤1ppm is advisable.
Embodiment 2
As shown in Fig. 2, in a kind of krypton xenon gaseous mixture described in the utility model trace methane removing means, it is net comprising first
Change pipe 1, second and purifies pipe 2 and pipeline system and valve system；The 506TJW for being 2-3mm filled with partial size in first purification pipe 1
Type demethanation catalyst, the second purification pipe 2 are first adsorption layer 21, first adsorption layer 21 at the air inlet of the second purification pipe
For the efficient deoxidation adsorbent of PEE type；It is the second adsorption layer 22 at second purification pipe gas outlet, the second adsorption layer has 5A molecule screen banks
At the volume ratio of first adsorption layer 21 and the second adsorption layer 22 is 1:1.
The pipeline system and valve system of the removing means include the first connecting tube being connected to the first purification pipe air inlet
31, the second connecting tube 32 and the second purification pipe gas outlet of the first purification pipe gas outlet of connection and the second purification pipe air inlet connect
Logical third connecting tube 33 is provided with the first valve 41 in first connecting tube, concatenated second valve is provided in the second connecting tube
Door 42 and third valve 43；The first bypass branch being connected to the second connecting tube is provided between second valve 42 and third valve 43
Pipe 51 is provided with the 4th valve 44 in first bypass branch, the 5th valve 45 is provided in third connecting tube.
It is connected with the second bypass branch 52 in the first purification 1 air inlet of pipe, is provided with the 6th valve in the second bypass branch
46, turning off or on for the second bypass branch 52 is controlled using the 6th valve 46.
The third bypass branch 53 being connected to the second connecting tube 32 is provided between the second valve 42 and third valve 43,
The 7th valve 47 is provided in third bypass branch 53, the 7th valve 47 is used to control unlatching or the pass of third bypass branch 53
It closes, so that the gas system that the first purification pipe 1 and the second purification pipe 2 access separates.
It is communicated with the 4th bypass branch 54 in the second purification pipe gas outlet, is provided with the 8th valve in the 4th bypass branch 54
48。
Using in above-mentioned krypton xenon gaseous mixture trace methane removing means carry out trace methane removing method, comprising with
Lower step:
Step 1:
The pretreatment of first purification pipe: the second valve 42, the 4th valve 44 and the 6th valve 46 are opened, the first valve is closed
41, the first purification tube temperature degree is warming up to 300-350 DEG C, is passed through from the first bypass branch by third valve 43 and the 7th valve 47
Flow is the oxygen of 4-5L/min, and being passed through the time is 20-24h, and oxygen is flowed out from the second bypass branch 52, and oxygen, which is passed through, to be finished
Afterwards, nitrogen is passed through from the first bypass branch 51 to purge the first purification pipe 1, purge time 6-8h；
Step 2:
The pretreatment of second purification pipe: the second valve 42 and the 4th valve 44 are closed, third valve 43, the 7th valve are opened
47 and the 8th valve 48, the second purification pipe is warming up to 300-350 DEG C, hydrogen, hydrogen flowing quantity is passed through from third bypass branch 53
For 4-5L/min, being passed through the hydrogen time is 40-48h, and hydrogen is flowed out by the 4th bypass branch 54, then bypasses branch by third
Pipe 53 accesses nitrogen and purges to the second purification pipe 2, purge time 6-8h；
Step 3:
Demethanation processing: closing the 4th valve 44, the 6th valve 46, the 7th valve 47 and the 8th valve 48, opens first
Valve 41, the second valve 42, third valve 43 and the 5th valve 45, by krypton xenon gaseous mixture with 2000-20000hr-1Air speed is from
One connecting tube 31 is passed through, and subsequent gaseous mixture enters the first purification pipe 1 by the first connecting tube 31, then passes through the second connecting tube 32
It is flowed out from third connecting tube 33 into the second purification pipe 2 by the krypton xenon gaseous mixture that the second purification pipe 2 purifies；
Step 4:
Monitoring: when being more than 1ppm from the methane in the krypton xenon gaseous mixture flowed out in third connecting tube 33, stop the mixing of krypton xenon
Gas is passed through, and is managed according to the first purification of step 1 processing, oxygen is passed through the time as 1-2h, purge time 30-60min；When from
(preset threshold is according to client's need when the carbon dioxide content in krypton xenon gaseous mixture flowed out in third connecting tube is more than preset threshold
The product standard asked determines that the range as preset threshold is chosen can be 0.1-1ppm), stop being passed through for krypton xenon gaseous mixture, according to
Step 2 processing the second purification pipe, the time that hydrogen is passed through is 1-2h, purge time 30-60min.
Claims (10)
1. the removing means of trace methane in a kind of krypton xenon gaseous mixture, which is characterized in that including the first purification pipe, the second purification
Pipe purifies the first connecting tube of pipe air inlet connection with first, connect the first purification pipe gas outlet and the second purification pipe air inlet
The second connecting tube and with the second third connecting tube for being connected to of purification pipe gas outlet；First is provided in first connecting tube
Valve；Concatenated second valve and third valve are provided in second connecting tube；Second valve and third valve it
Between be provided with the first bypass branch being connected to the second connecting tube, be provided with the 4th valve in first bypass branch；It is described
The 5th valve is provided in third connecting tube；Demethanation catalyst is filled in the first purification pipe；The second purification pipe
The first adsorption layer and the second adsorption layer comprising molecular sieve that middle filling bag contains deoxidier.
2. the removing means of trace methane in krypton xenon gaseous mixture according to claim 1, which is characterized in that described first is net
Change pipe air inlet and is connected with the second bypass branch；The 6th valve is provided in second bypass branch.
3. the removing means of trace methane in krypton xenon gaseous mixture according to claim 1, which is characterized in that second valve
The third bypass branch being connected to the second connecting tube is provided between door and third valve；It is provided in the third bypass branch
7th valve.
4. the removing means of trace methane in krypton xenon gaseous mixture according to claim 1, which is characterized in that described second is net
Change pipe gas outlet and is communicated with the 4th bypass branch；The 8th valve is provided in 4th bypass branch.
5. the removing means of trace methane in krypton xenon gaseous mixture according to claim 1, which is characterized in that the demethanation
Catalyst is 506TJW type catalyst.
6. the removing means of trace methane in krypton xenon gaseous mixture according to claim 1, which is characterized in that the deoxidier
For the efficient deoxidation adsorbent of PEE type.
7. the removing means of trace methane in krypton xenon gaseous mixture according to claim 1, which is characterized in that the molecular sieve
For 5A type molecular sieve.
8. the removing means of trace methane in krypton xenon gaseous mixture according to claim 1, which is characterized in that described first inhales
Attached layer is located at the second purification pipe air inlet；Second adsorption layer is located at the second purification pipe gas outlet.
9. the removing means of trace methane in krypton xenon gaseous mixture according to claim 1, which is characterized in that described first inhales
The volume ratio of attached layer and the second adsorption layer is 1:1.
10. the removing means of trace methane in a kind of krypton xenon gaseous mixture, which is characterized in that including the first purification pipe, the second purification
Pipe, pipe-line system；
Demethanation catalyst is filled in the first purification pipe；
The first adsorption layer and the second adsorption layer comprising molecular sieve that filling bag contains deoxidier in the second purification pipe,
The pipe-line system include with first purification pipe air inlet connection the first connecting tube, connect first purify pipe gas outlet and
Second connecting tube of the second purification pipe air inlet and the third connecting tube being connected to the second purification pipe gas outlet；Described first connects
The first valve is provided on adapter tube；Concatenated second valve and third valve are provided in second connecting tube；The third
The 5th valve is provided in connecting tube；
The first bypass branch and third being connected to respectively with the second connecting tube are provided between second valve and third valve
Bypass branch is provided with the 4th valve in first bypass branch, is provided with the 7th valve in the third bypass branch；Institute
It states the first purification pipe air inlet and is equipped with the second bypass branch, be provided with the 6th valve in second bypass branch；Described second
The outlet of purification pipe is connected with the 4th bypass branch, is provided with the 8th valve in the 4th bypass branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820612435.5U CN208200388U (en) | 2018-04-27 | 2018-04-27 | The removing means of trace methane in a kind of krypton xenon gaseous mixture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820612435.5U CN208200388U (en) | 2018-04-27 | 2018-04-27 | The removing means of trace methane in a kind of krypton xenon gaseous mixture |
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| CN208200388U true CN208200388U (en) | 2018-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108609591A (en) * | 2018-04-27 | 2018-10-02 | 南京特种气体厂股份有限公司 | The removing means and removal methods of trace methane in a kind of krypton xenon gaseous mixture |
-
2018
- 2018-04-27 CN CN201820612435.5U patent/CN208200388U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108609591A (en) * | 2018-04-27 | 2018-10-02 | 南京特种气体厂股份有限公司 | The removing means and removal methods of trace methane in a kind of krypton xenon gaseous mixture |
| CN108609591B (en) * | 2018-04-27 | 2024-07-05 | 南京特种气体厂股份有限公司 | Device and method for removing trace methane in krypton-xenon mixed gas |
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