CN106064817B - A kind of Gas Purification Factory high-carbon tail gas carbon dioxide recovery method and device - Google Patents
A kind of Gas Purification Factory high-carbon tail gas carbon dioxide recovery method and device Download PDFInfo
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- CN106064817B CN106064817B CN201610385219.7A CN201610385219A CN106064817B CN 106064817 B CN106064817 B CN 106064817B CN 201610385219 A CN201610385219 A CN 201610385219A CN 106064817 B CN106064817 B CN 106064817B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0043—Impurity removed
- C01B2210/0062—Water
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Abstract
The invention belongs to natural gas purification field, and in particular to a kind of Gas Purification Factory high-carbon tail gas carbon dioxide recovery method and device, which are that a kind of Gas Purification Factory is high, contains CO2The CO of tail gas2Liquefaction and purification recovery process, and implement the device of the technique, this Gas Purification Factory high-carbon tail gas carbon dioxide recovery method and device, Gas Purification Factory height can be reclaimed and contain CO2CO in tail gas2, reducing the carbon emission problem to atmospheric environment, be Changqing oilfields CO again2The tertiary oil recovery of drive provides liquid CO2, there is environmental benefit and economic benefit；Reclaimed again using combination supercharging, dehydration technology, propane refrigeration and pressure-variable adsorption fixed gas, ensure that CO2The rate of recovery more than 85%.
Description
Technical field
The invention belongs to natural gas purification field, and in particular to a kind of Gas Purification Factory high-carbon tail gas carbon dioxide recovery
Method and device, which is that a kind of Gas Purification Factory is high, contains CO2The CO of tail gas2Liquefaction and purification recovery process, and implement the technique
Device.
Background technology
Contain a certain amount of H in Changqing Gas Fields Lower Paleozoic strata natural gas2S and CO2, to the raw material in Gas Purification Factory
Gas carries out de- H2S and CO2, to meet the requirement of the quality index of national commercial natural gas, resulting acid gas passes through sulphur recovery
The long celebrating distinctive height of Gas Purification Factory is formd after device processing and contains CO2Tail gas, the measure of directly discharge air is first taken,
CO2Gas has very strong greenhouse gases.China is currently carbon emission state maximum in the world, and carbon emission amount accounts within 2013
The whole world 27.7%, per capita Chinese 7.2t, long celebrating are pacified the border region about 800 tons of the average daily carbon emission amount of gas field Gas Purification Factory, and China facing is difficult
Huge emission reduction tasks, it is also a kind of responsibility and promise to the people to the world to be.
CO in large chemical complex's recovery tail gas2Frequently with following methods：
Due to the CO in the tail gas of chemical enterprise2Content is both greater than 95%, and remaining is nearly all water vapour etc., without H2S、N2
And O2Impurity, frequently with separate unit multi-stage booster, normal temperature separation, molecular sieve dehydration, ammonia refrigeration, liquefaction, low temperature gas-liquid separation and storage
Deposit.
The above method is not suitable with Changqing Gas Fields Gas Purification Factory height and contains CO2Tail gas, mainly there is following reason：
1. the CO in the tail gas of chemical enterprise2Content is high, is easier to liquefy, and its liquefaction pressure is low, and condensing temperature is high, needs
The pressure to be pressurized is not high, reaches 2.0MPa, and temperature reaches -20 DEG C with regard to liquefiable；
2. the CO in the tail gas of chemical enterprise2It need not purify, can be met using simple low temperature gas-liquid separator will
Ask, only produce the CO of food-grade2When, purifying plant is just set.
③Gong enterprises recovery tail gas is not provided with fixed gas retracting device again.
The content of the invention
The purpose of the present invention is to overcome the CO in existing large chemical complex's recovery tail gas2Method be not suitable with Changqing Gas Fields
Gas Purification Factory height contains CO2Tail gas, propose that one kind is suitable for use in Gas Purification Factory height and contains CO2The technique and dress of tail gas recycle
Put.
Therefore, the invention provides a kind of Gas Purification Factory high-carbon tail gas carbon dioxide recovery method, including following step
Suddenly：
（1）Height of the Gas Purification Factory after sulphur recovery is contained into CO2Tail gas passes through refrigerated separation, and exhaust temperature is by 100
DEG C 40 DEG C are reduced to, water content is reduced to 3.48% by the 5.45% of mass percent；
（2）The tail gas of refrigerated separation is closed into supercharging and refrigerated separation, tail gas pressure through air blower and screw compressor unit
By normal pressure pressurizing to 800kPa, temperature is reduced to 10 DEG C, and water content is reduced to the 0.09% of mass percent；
（3）By step（2）Tail gas after processing, which carries out molecular sieve deep dehydration, makes its water dew point reach -40 DEG C, and tail gas contains
Water is reduced to below 15ppm；
（4）By step（3）Tail gas after processing carries out secondary booster through reciprocating compressor and cooled down, and tail gas pressure reaches
3500kPa, temperature are 40 DEG C；
（5）By step（4）Tail gas after processing cools down by bottom reboiler precooling and ice chest two-stage, the temperature drop of tail gas
Low is -30 DEG C, and forms the gas-liquid mixture containing liquid 70%；
（6）By gas-liquid mixture reducing pressure by regulating flow, pressure is reduced to 2100 kPa, and temperature is reduced to -38 DEG C；
（7）Gas-liquid mixture enters purifying column concentrate, and thermal source is step（4）Tail gas；
（8）By step（7）The liquid CO of concentrate2It is subcooled into ice chest and enters liquid CO2Storage tank.
Described step（7）Middle purifying column bottom of towe liquid CO2In contain O2, O2Concentration be 10ppm, liquid CO2Concentration reaches
To 99.98%, temperature is -16.60 DEG C；Described step（7）Middle CO2Crossed into ice chest and be cooled to -30 DEG C and entrance liquid CO2Storage
Tank.
By step（7）The fixed gas of middle purification column overhead enters retracting device again, through concentrate, supercharging and cooling liquid.
Described fixed gas enters retracting device again, through pressure-swing absorption apparatus concentrate, CO2Concentration by 57% concentrate extremely
95%, then through supercharging and cooling liquid, liquid CO2Eventually enter into storage tank.
A kind of Gas Purification Factory high-carbon tail gas carbon dioxide retracting device, including the first cooled separation being sequentially connected in series
It is device, air blower, the first gas-liquid separator, helical-lobe compressor, the second cooled separator, molecular sieve dehydration sledge, first reciprocating
Compressor, the second gas-liquid separator, reboiler；
Pure CO in reboiler2Liquid outlet is by pipeline through being connected with spherical tank after main ice chest；The outlet of reboiler residue gas is logical
Cross after pipeline passes through main ice chest and be communicated to purifying column, and choke valve is set on the pipeline, purifying column bottom liquid outlet connects
Reboiler is passed to, purifies the external discharge of column overhead fixed gas.
The tower top fixed gas outlet of the purifying column of described outer row is connected by pipeline with the second cooled separator；Second
Cooled separator connects fixed gas retracting device again by pipeline；
Retracting device includes pressure-changed adsorption concentrating device, the second reciprocating compressor, auxiliary reboiler, auxiliary ice chest to fixed gas again
With auxiliary purifying column, the second cooled separator is sequentially connected in series pressure-changed adsorption concentrating device, the second reciprocating compressor, auxiliary by pipeline
Reboiler, pure CO in auxiliary reboiler2Liquid outlet is connected by pipeline with spherical tank；Reboiler）Remaining gas outlet is passed through by pipeline
Auxiliary purifying column is connected to after auxiliary ice chest, auxiliary purifying column bottom liquid outlet is communicated to auxiliary reboiler, auxiliary purification column overhead fixed gas
External discharge.
Described auxiliary ice chest and main ice chest provide refrigeration by propane refrigerator, propane refrigerator respectively by pipeline with
Auxiliary ice chest connects with main ice chest.
Described the first cooled separator, the first gas-liquid separator, the second cooled separator, molecular sieve dehydration sledge,
Second gas-liquid separator has drain outlet, and these drain outlets are connected by delivery outlet outside pipeline respectively.
Described the first cooled separator and the second cooled separator is respectively connected to recirculated cooling water and carrys out liquid pipe
Line and liquid back pipe line.
Described molecular sieve dehydration sledge is connected with regeneration gas outlet line, and pressure-changed adsorption concentrating device is provided with row's bleeder holes,
Row's bleeder holes are connected with molecular sieve dehydration sledge.
Beneficial effects of the present invention：This Gas Purification Factory high-carbon tail gas carbon dioxide recovery method provided by the invention
And device, Gas Purification Factory height can be reclaimed and contain CO2CO in tail gas2, reducing the carbon emission problem to atmospheric environment,
It is Changqing oilfields CO again2The tertiary oil recovery of drive provides liquid CO2, there is environmental benefit and economic benefit；Be pressurized using combination,
Dehydration technology, propane refrigeration and pressure-variable adsorption fixed gas reclaim again, ensure that CO2The rate of recovery more than 85%.
Brief description of the drawings
The present invention is described in further details below with reference to accompanying drawing.
Fig. 1 is the application example process flow diagram of the present invention.
Description of reference numerals：1st, it is high to contain CO2Tail gas；2nd, the first cooled separator；3rd, air blower；4th, the first gas-liquid separation
Device；5th, helical-lobe compressor；6th, the second cooled separator；7th, molecular sieve dehydration sledge；8th, the first reciprocating compressor；9th, the second gas
Liquid/gas separator；10th, reboiler；11st, main ice chest；12nd, spherical tank；13rd, purifying column；14th, choke valve；15th, pressure-changed adsorption concentrating device；
16th, the second reciprocating compressor；17th, auxiliary reboiler；18th, auxiliary ice chest；19th, auxiliary purifying column；20th, propane refrigerator；21st, outside pipeline
Delivery outlet；22nd, liquid pipe line is carried out；23rd, liquid back pipe line；24th, regeneration gas outlet line.
Embodiment
Embodiment 1：
The present embodiment provides a kind of Gas Purification Factory high-carbon tail gas carbon dioxide recovery method, with reference to shown in Fig. 1, including
Following steps：
（1）Height of the Gas Purification Factory after sulphur recovery is contained into CO2Tail gas passes through refrigerated separation, and exhaust temperature is by 100
DEG C 40 DEG C are reduced to, water content is reduced to 3.48% by the 5.45% of mass percent；
（2）The tail gas of refrigerated separation is closed into supercharging and refrigerated separation, tail gas pressure through air blower and screw compressor unit
By normal pressure pressurizing to 800kPa（G）, temperature is reduced to 10 DEG C, and water content is reduced to the 0.09% of mass percent；
（3）By step（2）Tail gas after processing, which carries out molecular sieve deep dehydration, makes its water dew point reach -40 DEG C, and tail gas contains
Water is reduced to below 15ppm；
（4）By step（3）Tail gas after processing carries out secondary booster through reciprocating compressor and cooled down, and tail gas pressure reaches
3500kPa（G）, temperature is 40 DEG C；
（5）By step（4）Tail gas after processing cools down by bottom reboiler precooling and ice chest two-stage, the temperature drop of tail gas
Low is -30 DEG C, and forms the gas-liquid mixture containing liquid 70%；
（6）By gas-liquid mixture reducing pressure by regulating flow, pressure is reduced to 2100kPa（G）, temperature is reduced to -38 DEG C；
（7）Gas-liquid mixture enters purifying column concentrate, and thermal source is step（4）Tail gas；
（8）By step（7）The liquid CO of concentrate2It is subcooled into ice chest and enters liquid CO2Storage tank.
Described step（7）Middle purifying column bottom of towe liquid CO2In contain O2, O2Concentration be 10ppm, liquid CO2Concentration reaches
To 99.98%, temperature is -16.60 DEG C；Described step（7）Middle CO2Crossed into ice chest and be cooled to -30 DEG C and entrance liquid CO2Storage
Tank.
Contain CO by the way that the Gas Purification Factory of the present embodiment is high2The CO of tail gas2Liquefaction and purification recovery process, can be reclaimed
Gas Purification Factory height contains CO2CO in tail gas2, reducing the carbon emission problem to atmospheric environment, be Changqing oilfields CO again2
The tertiary oil recovery of drive provides liquid CO2, there is environmental benefit and economic benefit；Utilize combination supercharging, dehydration technology, propane system
Cold and pressure-variable adsorption fixed gas reclaims again, ensure that CO2The rate of recovery more than 85%.
Embodiment 2：
In above-described embodiment 1, step（7）In remaining fixed gas further can also be reclaimed again, the present embodiment
On the basis of embodiment 1, by step（7）The fixed gas of middle purification column overhead enters retracting device again, through concentrate, supercharging and
Cooling liquid.
Fixed gas enters retracting device again, through pressure-swing absorption apparatus concentrate, CO2Concentration, to 95%, then is passed through by 57% concentrate
Supercharging and cooling liquid, liquid CO2Eventually enter into storage tank.
Embodiment 3：
The present embodiment provides a kind of Gas Purification Factory high-carbon tail gas carbon dioxide retracting device, as shown in figure 1, including according to
First cooled separator 2 of secondary concatenation, air blower 3, the first gas-liquid separator 4, helical-lobe compressor 5, the separation of the second cooled
Device 6, molecular sieve dehydration sledge 7, the first reciprocating compressor 8, the second gas-liquid separator 9, reboiler 10；
Pure CO in reboiler 102Liquid outlet is connected after passing through main ice chest 11 by pipeline with spherical tank 12；Reboiler 10 is remaining
Gas outlet is communicated to purifying column 13 after passing through main ice chest 11 by pipeline, and choke valve 14, purifying column are set on the pipeline
13 bottom liquid outlets are communicated to reboiler 10, the external discharge of tower top fixed gas of purifying column 13.
The specific course of work of Gas Purification Factory high-carbon tail gas carbon dioxide retracting device is as follows：Gas Purification Factory is high
Containing CO2The auto purification factory sulfur recovery facility of tail gas 1 comes, and is connected with the first cooled separator 2；By Gas Purification Factory through sulphur
Height after recovery contains CO2Tail gas passes through refrigerated separation, and exhaust temperature is reduced to 40 DEG C by 100 DEG C, and water content is by mass percent
5.45% be reduced to 3.48%；
First cooled separator 2 is connected by pipeline with air blower 3；Air blower 3 passes through pipeline and the first gas-liquid separation
Device 4 is connected；First gas-liquid separator 4 is connected by pipeline with helical-lobe compressor 5；Helical-lobe compressor 5 is cold with second by pipeline
But formula separator 6 is connected；The tail gas of refrigerated separation is combined into supercharging and refrigerated separation, tail through air blower 4 and screw compressor 5
Atmospheric pressure is by normal pressure pressurizing to 800kPa（G）, temperature is reduced to 10 DEG C, and water content is reduced to the 0.09% of mass percent；
Second cooled separator 6 is connected by pipeline with molecular sieve dehydration sledge 7；Tail gas after above-mentioned processing is divided
Son sieve deep dehydration makes its water dew point reach -40 DEG C, and tail gas aqueous amount is reduced to below 15ppm；
Molecular sieve dehydration sledge 7 is connected by pipeline with the first reciprocating compressor 8；First reciprocating compressor 8 passes through pipe
Line is connected with the second gas-liquid separator 9；Tail gas after above-mentioned processing is subjected to secondary booster through reciprocating compressor and cooled down, tail
Atmospheric pressure reaches 3500kPa（G）, temperature is 40 DEG C；
Second gas-liquid separator 9 is connected by pipeline with reboiler 10；Reboiler 10 is connected by pipeline with main ice chest 11；
Tail gas after above-mentioned processing is cooled down by bottom reboiler precooling and ice chest two-stage, the temperature of tail gas is reduced to -30 DEG C, and shape
Into the gas-liquid mixture containing liquid 70%；
The CO of main ice chest 112Gas-liquid mixture is connected by choke valve 14, feed-line with purifying column 13；By gas-liquid mixed
Thing reducing pressure by regulating flow, pressure are reduced to 2100kPa（G）, temperature is reduced to -38 DEG C；Gas-liquid mixture enters purifying column concentrate, and thermal source is step
Suddenly（4）Tail gas；
The tower top fixed gas of purifying column 13 is connected by pipeline with main ice chest 11；10 pure CO of reboiler2Liquid passes through pipeline and master
Ice chest 11 is connected；Main 11 pure CO of ice chest2Liquid is connected by pipeline with spherical tank 12；By the liquid CO of concentrate2Gone forward side by side into ice chest supercooling
Enter liquid CO2Storage tank, that the lower part outlet of spherical tank 12 is discharged is the liquid CO of recovery2。
Embodiment 4：
On the basis of Gas Purification Factory high-carbon tail gas carbon dioxide retracting device in above-described embodiment 3, this implementation
Example is further improved, and adds a set of device reclaimed again, in above-described embodiment 3, the tower of the purifying column 13 of outer row
Top fixed gas outlet is connected by pipeline with the second cooled separator 6；Second cooled separator 6 is not coagulated by pipeline connection
Gas retracting device again；
Fixed gas again retracting device include pressure-changed adsorption concentrating device 15, the second reciprocating compressor 16, auxiliary reboiler 17,
Auxiliary ice chest 18 and auxiliary purifying column 19, it is past that the second cooled separator 6 by pipeline is sequentially connected in series pressure-changed adsorption concentrating device 15, second
Twin compressor 16, auxiliary reboiler 17, pure CO in auxiliary reboiler 172Liquid outlet is connected by pipeline with spherical tank 12；Reboiler 10
Remaining gas outlet is connected to auxiliary purifying column 19 after passing through auxiliary ice chest 18 by pipeline, and the auxiliary bottom liquid outlet of purifying column 19 is communicated to
Auxiliary reboiler 17, the auxiliary external discharge of tower top fixed gas of purifying column 19.
The tower top fixed gas of main ice chest 11 is connected by pipeline with the second cooled separator 6；Second cooled separator 6
It is connected by pressure-changed adsorption concentrating device 15 of the pipeline with fixed gas again in retracting device；Pressure-changed adsorption concentrating device 15 passes through pipe
Line, the second reciprocating compressor 16, auxiliary reboiler 17, auxiliary ice chest 18, auxiliary purifying column 19 are connected；Fixed gas is again in retracting device
Auxiliary reboiler 17 in pure CO2Liquid is connected by pipeline with spherical tank 12；
By the recovery again of the retracting device again in the present embodiment so that Gas Purification Factory high-carbon tail gas titanium dioxide
Carbon recovery is more thorough.
Embodiment 5：
The present embodiment is on the basis of above-mentioned several embodiments, is further remarked additionally, auxiliary ice chest 18 and main ice chest 11
Refrigeration is provided by propane refrigerator 20, the propane in propane refrigerator 20 passes through pipeline and auxiliary ice chest 18 and main ice chest respectively
11 connections.As shown in figure 1, the propane of propane refrigerator 20 is connected by line c 2 with main ice chest 11, auxiliary ice chest 18；Main ice chest
11st, the connected propane of auxiliary ice chest 18 is connected by line c 1 with propane refrigerator 20.
First cooled separator 2, the first gas-liquid separator 4, the second cooled separator 6, molecular sieve dehydration sledge 7,
Two gas-liquid separators 9 have drain outlet, and these drain outlets are connected by delivery outlet outside pipeline 21 respectively.
First cooled separator 2 and the second cooled separator 6 are respectively connected to recirculated cooling water and carry out liquid pipe line 22
With liquid back pipe line 23.
Molecular sieve dehydration sledge 7 is connected with regeneration gas outlet line 24, and pressure-changed adsorption concentrating device 15 is provided with row's bleeder holes, should
Row's bleeder holes are connected with molecular sieve dehydration sledge 7, pass through the regeneration gas in the road pipeline discharger.
In summary, this Gas Purification Factory high-carbon tail gas carbon dioxide recovery method and device of the invention, can be with
Recovery Gas Purification Factory is high to contain CO2CO in tail gas2, reducing the carbon emission problem to atmospheric environment, be Changqing oilfields again
CO2The tertiary oil recovery of drive provides liquid CO2, there is environmental benefit and economic benefit；Utilize combination supercharging, dehydration technology, propane
Refrigeration and pressure-variable adsorption fixed gas reclaim again, ensure that CO2The rate of recovery more than 85%.
It is exemplified as above be only to the present invention for example, do not form the limitation to protection scope of the present invention, it is all
It is to be belonged to the same or analogous design of the present invention within protection scope of the present invention.
Claims (10)
1. a kind of Gas Purification Factory high-carbon tail gas carbon dioxide recovery method, it is characterised in that comprise the following steps：
（1）Height of the Gas Purification Factory after sulphur recovery is contained into CO2Tail gas passes through refrigerated separation, and exhaust temperature is by 100 DEG C of reductions
To 40 DEG C, water content is reduced to 3.48% by the 5.45% of mass percent；
（2）The tail gas of refrigerated separation is closed into supercharging and refrigerated separation through air blower and screw compressor unit, tail gas pressure is by normal
Pressure is pressurized to 800kPa, and temperature is reduced to 10 DEG C, and water content is reduced to the 0.09% of mass percent；
（3）By step（2）Tail gas after processing, which carries out molecular sieve deep dehydration, makes its water dew point reach -40 DEG C, tail gas aqueous amount
It is reduced to below 15ppm；
（4）By step（3）Tail gas after processing carries out secondary booster through reciprocating compressor and cooled down, and tail gas pressure reaches
3500kPa, temperature are 40 DEG C；
（5）By step（4）Tail gas after processing cools down by bottom reboiler precooling and ice chest two-stage, and the temperature of tail gas reduces
For -30 DEG C, and form the gas-liquid mixture containing liquid 70%；
（6）By gas-liquid mixture reducing pressure by regulating flow, pressure is reduced to 2100kPa, and temperature is reduced to -38 DEG C；
（7）Gas-liquid mixture enters purifying column concentrate, and thermal source is step（4）Tail gas；
（8）By step（7）The liquid CO of concentrate2It is subcooled into ice chest and enters liquid CO2Storage tank.
2. Gas Purification Factory high-carbon tail gas carbon dioxide recovery method as claimed in claim 1, it is characterised in that：Described
Step（7）Middle purifying column bottom of towe liquid CO2In contain O2, O2Concentration be 10ppm, liquid CO2Concentration reaches 99.98%, temperature
For -16.60 DEG C；Described step（8）Middle CO2Crossed into ice chest and be cooled to -30 DEG C and entrance liquid CO2Storage tank.
3. Gas Purification Factory high-carbon tail gas carbon dioxide recovery method as claimed in claim 1 or 2, it is characterised in that：Will
Step（7）The fixed gas of middle purification column overhead enters retracting device again, through concentrate, supercharging and cooling liquid.
4. Gas Purification Factory high-carbon tail gas carbon dioxide recovery method as claimed in claim 3, it is characterised in that：Described
Fixed gas enters retracting device again, through pressure-swing absorption apparatus concentrate, CO2Concentration by 57% concentrate to 95%, then through supercharging and it is cold
But liquefy, liquid CO2Eventually enter into storage tank.
A kind of 5. Gas Purification Factory high-carbon tail gas carbon dioxide retracting device, it is characterised in that：Including be sequentially connected in series first
Cooled separator（2）, air blower（3）, the first gas-liquid separator（4）, helical-lobe compressor（5）, the second cooled separator
（6）, molecular sieve dehydration sledge（7）, the first reciprocating compressor（8）, the second gas-liquid separator（9）, reboiler（10）；
Reboiler（10）In pure CO2Liquid outlet passes through main ice chest by pipeline（11）Afterwards with spherical tank（12）It is connected；Reboiler（10）It is surplus
Residual air outlet passes through main ice chest by pipeline（11）After be communicated to purifying column（13）, and choke valve is set on the pipeline
（14）, purifying column（13）Bottom liquid outlet is communicated to reboiler（10）, purifying column（13）The external discharge of tower top fixed gas.
6. Gas Purification Factory high-carbon tail gas carbon dioxide retracting device as claimed in claim 5, it is characterised in that：Described
The purifying column of outer row（13）Tower top fixed gas outlet pass through pipeline and the second cooled separator（6）It is connected；Second cooled
Separator（6）Fixed gas retracting device again is connected by pipeline；
Retracting device includes pressure-changed adsorption concentrating device to fixed gas again（15）, the second reciprocating compressor（16）, auxiliary reboiler
（17）, auxiliary ice chest（18）With auxiliary purifying column（19）, the second cooled separator（6）Pressure-changed adsorption concentrating is sequentially connected in series by pipeline
Device（15）, the second reciprocating compressor（16）, auxiliary reboiler（17）, auxiliary reboiler（17）In pure CO2Liquid outlet by pipeline with
Spherical tank（12）It is connected；Auxiliary reboiler（17）Remaining gas outlet passes through auxiliary ice chest by pipeline（18）After be connected to auxiliary purifying column
（19）, auxiliary purifying column（19）Bottom liquid outlet is communicated to auxiliary reboiler（17）, auxiliary purifying column（19）Run in outside tower top fixed gas
Put.
7. Gas Purification Factory high-carbon tail gas carbon dioxide retracting device as claimed in claim 6, it is characterised in that：Described
Auxiliary ice chest（18）With main ice chest（11）Pass through propane refrigerator（20）Refrigeration, propane refrigerator are provided（20）Pass through pipeline respectively
With auxiliary ice chest（18）With main ice chest（11）Connection.
8. Gas Purification Factory high-carbon tail gas carbon dioxide retracting device as claimed in claim 5, it is characterised in that：Described
First cooled separator（2）, the first gas-liquid separator（4）, the second cooled separator（6）, molecular sieve dehydration sledge（7）,
Two gas-liquid separators（9）There is drain outlet, all drain outlets pass through delivery outlet outside pipeline respectively（21）It is connected.
9. Gas Purification Factory high-carbon tail gas carbon dioxide retracting device as claimed in claim 5, it is characterised in that：Described
First cooled separator（2）With the second cooled separator（6）Respectively it is connected to recirculated cooling water and carrys out liquid pipe line（22）With
Liquid back pipe line（23）.
10. Gas Purification Factory high-carbon tail gas carbon dioxide retracting device as claimed in claim 6, it is characterised in that：It is described
Molecular sieve dehydration sledge（7）It is connected with regeneration gas outlet line（24）, pressure-changed adsorption concentrating device（15）, should provided with row's bleeder holes
Arrange bleeder holes and molecular sieve dehydration sledge（7）Connection.
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| CN101040674B (en) * | 2007-04-29 | 2010-12-01 | 湖南凯美特气体股份有限公司 | Method for producing food level liquid carbon dioxide product |
| CN101254918B (en) * | 2008-03-31 | 2010-12-08 | 大连理工大学 | Device for purifying carbon dioxide by adsorption distillation technology |
| KR101045643B1 (en) * | 2010-11-16 | 2011-07-01 | (주)에이원 | Apparatus for liquefaction and purification of high purity and super high purity carbon dioxide |
| CN203419745U (en) * | 2013-07-18 | 2014-02-05 | 毛亚成 | Carbon dioxide distillation recycling device with double gas cabinets |
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