CN105841437B - Device and method for low-temperature separation of gas - Google Patents
Device and method for low-temperature separation of gas Download PDFInfo
- Publication number
- CN105841437B CN105841437B CN201610348061.6A CN201610348061A CN105841437B CN 105841437 B CN105841437 B CN 105841437B CN 201610348061 A CN201610348061 A CN 201610348061A CN 105841437 B CN105841437 B CN 105841437B
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- valve
- gas
- variable volume
- volume sample
- sample chamber
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- 238000000926 separation method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 82
- 238000005057 refrigeration Methods 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- 239000000203 mixture Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005194 fractionation Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000194 supercritical-fluid extraction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a device and a method for low-temperature separation of gas. The above-mentioned device includes: the low-temperature cold head is used for providing required temperature for gas, the variable volume sample cavity which is connected with the low-temperature cold head and used for containing gas and has variable volume is used for controlling the gas to enter and exit the variable volume sample cavity, the valve is connected with the first connecting pipeline of the variable volume sample cavity, and the second connecting pipeline is connected to the other side of the first connecting pipeline, wherein the second connecting pipeline is opposite to the valve. The method comprises the following steps: opening a valve, and enabling the mixed gas to be separated to enter a variable volume sample cavity through a second connecting pipeline, the valve and a first connecting pipeline which are connected with the valve; closing the valve; starting a low-temperature cold head connected with the variable-volume sample cavity, and cooling the variable-volume sample cavity to a temperature below a required gas liquefaction point; compressing the variable volume sample chamber and exhausting other gases through the valve; raising the temperature above the liquefaction point of the desired gas; the variable volume sample chamber is compressed and the desired gas is vented. The device provided by the invention is simple in structure and convenient to operate.
Description
Technical field
The present invention relates to gas separation technique field, in particular to a kind of device and method of gas low temperature separation.
Background technique
With the continuous development of China's metallurgy, chemical industry, electric power, especially coal chemical industry, market is to gas fractionation unit
Demand it is increasing.Currently, gas separation has supercritical fluid extraction and fractionation technology, gas membrane Seperation Technology, hyper-gravity gas
The advantages of a variety of methods such as body isolation technics, every kind of technology have its own and limitation.
The existing method of cryogenic separation target component gas is generally basede on admixture of gas freezing, mesh from admixture of gas
Component condensation is marked, and then isolates the condensate comprising target component gas from admixture of gas.In this method, gas
Body mixture freezing generally using the gas expansion in throttle valve and expanding machine be cost carry out, or application refrigerating plant come into
Row.In the scheme of cryogenic gas separation, use same flow heat exchanger and rectifying column as additional ancillary equipment.
For example, in a kind of method that 6182468 B1 of patent US is disclosed comprising machinery is not made in the cooling of mixture
The mixture expansion of function, during expansion the partial condensation of mixture, separating mixture or part of it obtain in rectifying column
Obtain liquid and gas product.In this case, implement the cooling of mixture using same flow heat exchanger and freezer unit, and mix
Object is then by carrying out throttling in valve to come the expansion of realizing mixture.
Gas low temperature separator disclosed above and method are needed using numerous large scale equipments such as rectifying column, exchanger
Or device, not only structure is complicated, but also there is also defects inconvenient for operation in operation.
Summary of the invention
The embodiment of the invention provides a kind of device and method of gas low temperature separation, are not only simple in structure, and operate
It is convenient.
In order to achieve the above-mentioned object of the invention, the embodiment of the invention provides a kind of devices of gas low temperature separation comprising:
For providing the low temperature cold head of required temperature for gas, it is connect with the low temperature cold head, for accommodating gas and variable volume
Variable volume sample chamber, control gas pass in and out the valve of the variable volume sample chamber, connect the valve and the variable capacity
First connecting pipe of product sample chamber, and be connected to the second of the relatively described first connecting pipe other side of the valve and connect
Adapter tube road.
In a kind of Installation practice of gas low temperature separation provided by the invention, the variable volume sample chamber is elasticity
The cavity or cylinder piston structure of material processing.
In a kind of Installation practice of gas low temperature separation provided by the invention, the cold source of the low temperature cold head is refrigeration
Machine or cryogenic media.
In a kind of Installation practice of gas low temperature separation provided by the invention, the valve is ball valve or needle-valve.
In a kind of Installation practice of gas low temperature separation provided by the invention, the valve is in low position, or
Person is in ambient temperature position.
In a kind of Installation practice of gas low temperature separation provided by the invention, described device is in vacuum environment.
The embodiment of the invention also provides a kind of methods of gas low temperature separation, and this method comprises the following steps:
Valve is opened, mixed gas to be separated is passed through into the second connecting pipe for being connected with the valve, the valve
Door and the first connecting pipe enter variable volume sample chamber；
Close the valve；
Start the low temperature cold head connecting with the variable volume sample chamber, and the variable volume sample chamber is cooled to institute
Need gas liquefaction point following temperature；
The variable volume sample chamber is compressed, other gases are discharged by the valve；
Raise the temperature to required gas liquefaction point or more；
The variable volume sample chamber is compressed, the required gas is discharged.
In a kind of embodiment of the method for gas low temperature separation provided by the invention, the variable volume sample chamber is elasticity
The cavity or cylinder piston structure of material processing.
In a kind of embodiment of the method for gas low temperature separation provided by the invention, the cold source of the low temperature cold head is refrigeration
Agent or cryogenic media.
In a kind of embodiment of the method for gas low temperature separation provided by the invention, the low temperature cold head, variable volume examination
Sample chamber and valve are in vacuum environment.
The device of gas low temperature separation provided by the invention is not only simple in structure, and easy to operate.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of schematic diagram of the device for gas low temperature separation that an embodiment of the present invention provides；
Fig. 2 is a kind of flow diagram of the method for gas low temperature separation that an embodiment of the present invention provides.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the drawings and specific embodiments,
Embodiment of the present invention is described further in detail.It should be understood that specific embodiment described in this specification
Just for the sake of explaining the present invention, it is not intended to limit the present invention.
Refering to Figure 1, the embodiment of the present invention has different liquefaction point and freezing point based on different types of gas,
A kind of device of gas low temperature separation is provided, which includes for providing the low temperature cold head 1 of low temperature for gas, with low temperature cold
First 1 connection, the variable volume sample chamber 2 for accommodating gas and variable volume, control gas pass in and out the variable volume sample
The valve 4 of chamber, the first connecting pipe 3 of connecting valve 4 and variable volume sample chamber 2, and it is connected to the opposite institute of the valve 4
State the second connecting pipe 5 of 3 other side of the first connecting pipe.
Low temperature cold head 1 is connect with variable volume sample chamber 2, provides separation gas for the gas in variable volume sample chamber 2
Required temperature, the cold source of the low temperature cold head 1 are refrigeration machine or cryogenic media, such as liquid nitrogen, liquid helium etc..
Variable volume sample chamber 2 for accommodating and separate gas, the volume of the variable volume sample chamber 2 be it is variable,
For the cavity or cylinder piston of elastic material processing.
Valve 4 may be configured as the other kinds of valve such as ball valve or needle-valve according to specific needs.
Further, above-mentioned valve 4 can be in low position as needed, or be in ambient temperature position.By adjusting first
The length of connecting pipe 3 can make valve 4 be in low position, or be in ambient temperature position, the i.e. length of the first connecting pipe 3
Degree is shorter, then valve 4 is in low position；If the length of the first connecting pipe 3 is longer, valve 4 is in ambient temperature position.
Further, to effectively reduce leakage heat, above-mentioned apparatus is placed in vacuum environment.It specifically, can will be whole
A device is placed in a vacuum cavity, so that device is in vacuum environment.
Fig. 2 and Fig. 1 are please referred to, based on the device of above-mentioned gas cryogenic separation shown in FIG. 1, the embodiment of the present invention is also provided
A kind of method of gas low temperature separation, this method comprises the following steps:
S1: opening valve 4, by mixed gas to be separated by the second connecting pipe 5 for being connected with the valve 4,
The valve 4 and the first connecting pipe 3 enter variable volume sample chamber 2；
For example, required gas is for nitrogen, above-mentioned air is placed in a container using mixed gas to be separated as air
In (not shown).It is first turned on valve 4, by air from being inputted in said vesse in above-mentioned variable volume sample chamber 2, specifically,
Air is flowed into variable volume sample chamber 2 by the second connecting pipe 5, valve 4 and the first connecting pipe 3.
S2: the valve 4 is closed；
Valve 4 is closed, air is placed in variable volume sample chamber 2.
S3: the low temperature cold head 1 that starting is connect with the variable volume sample chamber 2, and the variable volume sample chamber 2 is cold
But to required gas liquefaction point following temperature；
Further, the device of above-mentioned gas cryogenic separation is in vacuum environment.
Optionally, after the vacuum degree outside the device of gas low temperature separation meets condition, start the cold source of low temperature cold head 1,
The temperature of low temperature cold head 1 is reduced to the liquefaction point 77K of nitrogen hereinafter, such as 70K.
S4: compressing the variable volume sample chamber 2, other gases are discharged by the valve 4；
Stablize a period of time, after above-mentioned nitrogen liquefies from gaseous state as liquid, open valve 4, compresses above-mentioned variable
The volume of volume sample chamber 2 is discharged in variable volume sample chamber 2 and compares nitrogen still in gaseous hydrogen, helium and liquefaction point
Other low gases.
S5: required gas liquefaction point or more is raised the temperature to；
After other gases other than nitrogen are discharged, valve is closed, restores the volume of variable volume sample chamber 2, and by low
Warm cold head 1 is by liquefaction point temperatures above of the temperature control in nitrogen in variable volume sample chamber 2, such as 80K.
S6: compressing the variable volume sample chamber, and the required gas is discharged.
Stablize a period of time, after the above-mentioned nitrogen in liquid condition turns to gas, opens valve 4, then second compression can
The volume of capacity sample chamber 2 will pass through 5 row of the first connecting pipe 3, valve 4 and the second connecting pipe in gaseous nitrogen
Variable volume sample chamber 2 out, to realize the purpose of the cryogenic separation nitrogen from air.
The device and method of gas low temperature separation provided in an embodiment of the present invention, it is convenient to realize that gas separates, and
Structure is simple.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
According to the announcement and introduction of description above, those skilled in the art in the invention can also be to above embodiment
Carry out change and modification appropriate.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to this hair
Bright some modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although in this specification
It uses some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (10)
1. a kind of device of gas low temperature separation, which is characterized in that described device includes: for providing required temperature for gas
Low temperature cold head is connect, the variable volume sample chamber for accommodating gas and variable volume with the low temperature cold head, control gas into
The valve of the variable volume sample chamber out connects the first connecting pipe of the valve Yu the variable volume sample chamber, with
And it is connected to the second connecting pipe of the relatively described first connecting pipe other side of the valve.
2. the apparatus according to claim 1, which is characterized in that the variable volume sample chamber is the chamber of elastic material processing
Body or cylinder piston structure.
3. the apparatus of claim 2, which is characterized in that the cold source of the low temperature cold head is that refrigeration machine or low temperature are situated between
Matter.
4. device according to claim 3, which is characterized in that the valve is ball valve or needle-valve.
5. device according to claim 4, which is characterized in that the valve is in low position, or is in room temperature position
It sets.
6. device according to claim 5, which is characterized in that described device is in vacuum environment.
7. a kind of method of gas low temperature separation, which comprises the steps of:
Open valve, by mixed gas to be separated by the second connecting pipe for being connected with the valve, the valve and
First connecting pipe enters variable volume sample chamber；
Close the valve；
Start the low temperature cold head connecting with the variable volume sample chamber, and the variable volume sample chamber is cooled to required gas
Body liquefaction point following temperature；
The variable volume sample chamber is compressed, other gases are discharged by the valve；
Raise the temperature to required gas liquefaction point or more；
The variable volume sample chamber is compressed, the required gas is discharged.
8. according to the method described in claim 7, it is characterized by: the variable volume sample chamber is the chamber of elastic material processing
Body or cylinder piston structure.
9. according to the method described in claim 8, it is characterized by: the cold source of the low temperature cold head is that refrigerant or low temperature are situated between
Matter.
10. according to the method described in claim 9, it is characterized by: at the low temperature cold head, variable volume sample chamber and valve
In vacuum environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610348061.6A CN105841437B (en) | 2016-05-24 | 2016-05-24 | Device and method for low-temperature separation of gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610348061.6A CN105841437B (en) | 2016-05-24 | 2016-05-24 | Device and method for low-temperature separation of gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105841437A CN105841437A (en) | 2016-08-10 |
| CN105841437B true CN105841437B (en) | 2018-12-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610348061.6A Active CN105841437B (en) | 2016-05-24 | 2016-05-24 | Device and method for low-temperature separation of gas |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224899A (en) * | 2018-01-16 | 2018-06-29 | 中科睿凌江苏低温设备有限公司 | A kind of device of gas low temperature separation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841732A (en) * | 1987-12-28 | 1989-06-27 | Sarcia Domenico S | System and apparatus for producing and storing liquid gases |
| CN101625191A (en) * | 2009-08-10 | 2010-01-13 | 中国科学院理化技术研究所 | Gas low-temperature liquefaction separation system applying segregation separation effect |
| CN103797314A (en) * | 2011-07-14 | 2014-05-14 | 量子设计有限公司 | Liquefier with pressure-controlled liquefaction chamber |
| CN104534811A (en) * | 2014-12-26 | 2015-04-22 | 宁波健信机械有限公司 | Low-temperature liquid-state fluid preparing device |
| CN205784229U (en) * | 2016-05-24 | 2016-12-07 | 中国科学院理化技术研究所 | Gas low-temperature separation device |
-
2016
- 2016-05-24 CN CN201610348061.6A patent/CN105841437B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841732A (en) * | 1987-12-28 | 1989-06-27 | Sarcia Domenico S | System and apparatus for producing and storing liquid gases |
| CN101625191A (en) * | 2009-08-10 | 2010-01-13 | 中国科学院理化技术研究所 | Gas low-temperature liquefaction separation system applying segregation separation effect |
| CN103797314A (en) * | 2011-07-14 | 2014-05-14 | 量子设计有限公司 | Liquefier with pressure-controlled liquefaction chamber |
| CN104534811A (en) * | 2014-12-26 | 2015-04-22 | 宁波健信机械有限公司 | Low-temperature liquid-state fluid preparing device |
| CN205784229U (en) * | 2016-05-24 | 2016-12-07 | 中国科学院理化技术研究所 | Gas low-temperature separation device |
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| Publication number | Publication date |
|---|---|
| CN105841437A (en) | 2016-08-10 |
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