CN104449925B - Remove CO in synthesis gas/natural gas2Piece-rate system - Google Patents
Remove CO in synthesis gas/natural gas2Piece-rate system Download PDFInfo
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- CN104449925B CN104449925B CN201410835761.9A CN201410835761A CN104449925B CN 104449925 B CN104449925 B CN 104449925B CN 201410835761 A CN201410835761 A CN 201410835761A CN 104449925 B CN104449925 B CN 104449925B
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 17
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 133
- 238000000926 separation method Methods 0.000 claims abstract description 44
- 239000000428 dust Substances 0.000 claims abstract description 41
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 29
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 29
- 230000004888 barrier function Effects 0.000 claims abstract description 19
- 238000010992 reflux Methods 0.000 claims abstract description 17
- 239000003345 natural gas Substances 0.000 claims abstract description 15
- 238000010926 purge Methods 0.000 claims description 61
- 239000012528 membrane Substances 0.000 claims description 24
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 23
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 23
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims description 23
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims description 23
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 23
- 230000008676 import Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 26
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 description 24
- 238000000034 method Methods 0.000 description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 239000004697 Polyetherimide Substances 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 8
- 229920001601 polyetherimide Polymers 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 229920005573 silicon-containing polymer Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- MEYZYGMYMLNUHJ-UHFFFAOYSA-N tunicamycin Natural products CC(C)CCCCCCCCCC=CC(=O)NC1C(O)C(O)C(CC(O)C2OC(C(O)C2O)N3C=CC(=O)NC3=O)OC1OC4OC(CO)C(O)C(O)C4NC(=O)C MEYZYGMYMLNUHJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention provides CO in a kind of removing synthesis gas/natural gas2Piece-rate system, the piece-rate system includes：Dust removing units, gas separation unit and gas reflux unit；Wherein, the dust removing units are connected with gas separation unit, and gas backstreaming unit joins end to end to form gas circulation channel with gas separation unit.The piece-rate system of the present invention adds PTFE microporous barrier cleaners in the front end of gas separation unit, so as to effectively avoid pollution of a large amount of dust in natural gas and synthesis gas to its gas separation system；Meanwhile present invention employs two-stage piece-rate systems and gas circulation reflux, can adjust CO in gas by controlling gas backstreaming ratio2Concentration, to meet different production requirements.
Description
Technical field
The present invention relates to CO in removing gas2Piece-rate system, more particularly to removing synthesis gas/natural gas in CO2Separation
System
Background technology
Currently, with CO2Have become an extremely serious environmental problem for the greenhouse gas emission of representative.Cut-off is extremely
2010, the discharge of greenhouse gases had resulted in global temperatures and has risen 1.4 to 5.8 DEG C.And contain in natural gas and synthesis gas
A large amount of CO2Its calorific value is not only substantially reduced, to reduce combustion gas quality；But also reaction can be increased in Chemical Manufacture and divided
From equipment volume and increase power and heat consumption.Therefore, in Chemical Manufacture, the CO in these gases is removed2With very
Important meaning.
Remove CO2Method include mainly：Solvent absorption, pressure swing adsorption method, cryogenic distillation process and membrane separation process etc..It is molten
Agent absorption process is using liquid flux for CO2Absorption and desorption come reach separation CO2Method.There are many companies at present
This method is studied, and attempts to detach CO using new solvent and device2.Use is proposed if Mitsubishi heavy industry to be based on
The lyosoption of special amine absorbs the CO in flue gas2.Solvent absorption easily causes two due to using liquid-absorbant
Secondary pollution；Simultaneously because there is CO2Absorption and desorption process, therefore energy consumption is bigger.Pressure swing adsorption method is to use solid sorbent
The CO in exhaust gas is adsorbed in agent2, to reach separation CO2Purpose.Absorption method technical process is simple, low energy consumption, but adsorbent capacity
It is limited, a large amount of adsorbents are needed, and adsorption-desorption is frequent, it is desirable that high degree of automation.Cryogenic distillation process is by cryogenic condensation point
From CO2A kind of physical process.Cryogenic distillation process utilizes in Natural carbon dioxide gas source between Main Components methane and carbon dioxide
The difference of boiling point, is come out carbon dioxide separation with distillating method.This method equipment is huge, energy consumption is higher, separating effect is poor,
Thus cost is higher, less uses under normal circumstances, is only combined under special circumstances using or with other methods.Membrane separation process
It is a kind of novel efficient separation method.The principle of membrane separating process is using selective film as separating medium, in film two
Side applies pressure difference, utilizes CH4And CO2Gas molecule makes the component selection in gaseous mixture by the difference of the diffusion dissolution ability of film
Property penetrate film, to achieve the purpose that separating mixture.Compared with conventional method, membrane separation process has equipment simple, energy consumption
The advantages that low and non-secondary pollution.
Invention content
In view of the deficiencies of the prior art, CO in a kind of removing natural gas/synthesis gas of present invention offer2And according to actual needs
Adjust CO2The system of composition.The system can effectively remove the CO in natural gas and synthesis gas2, and according to the need of actual production
Adjust CO in gas2Concentration to meet the requirement of subsequent production.With equipment is simple, non-secondary pollution, low energy consumption, investment
CO in small, product2The advantages that concentration is adjustable.
The present invention provides CO in a kind of removing synthesis gas/natural gas2Piece-rate system, the piece-rate system includes：It removes
Dirt unit, gas separation unit and gas reflux unit；Wherein, the dust removing units are connected with gas separation unit, and gas returns
Stream unit joins end to end to form gas circulation channel with gas separation unit；
Wherein, dust removing units use plate and frame PTFE film deduster.
The plate and frame PTFE film deduster includes one or more dedusting structure；The dedusting structure be dedusting plate,
Dedusting frame and purging plate connect the enclosure space to be formed, according to dedusting plate, dedusting frame, purging plate, dedusting frame, dedusting plate it is suitable
Sequence assembles successively；It is empty frames among the dedusting frame, there are the covering of PTFE microporous barriers in both sides；The dedusting plate and the purging
Plate is longitudinal section solid separator in the shape of an " I "；The upper end of the dedusting plate, the dedusting frame and the purging plate is all provided with
There are dust and gas inlet channel and purge gass inlet channel, the lower end of the dedusting plate, the dedusting frame and the purging plate to be all provided with
There is outlet passageway；Between the dust and gas inlet channel, the purge gass inlet channel, the outlet passageway and the enclosure space
It is mutually isolated；The dust and gas inlet channel of the dedusting frame is equipped with the dark holes communicated with the empty frames, as dust and gas import；
The purge gass inlet channel both ends of the purging plate are equipped with the dark holes communicated with the purging plate inner space, as purging
Gas import；The outlet passageway of the dedusting plate is equipped with the dark holes communicated with the dedusting plate inner space, as first gas
Outlet；And the both ends of the outlet passageway of the purging plate be equipped with the dark holes that communicates of purging plate inner space, as the
Two gas vents；The second gas port closing in purge stages.
The dedusting plate carries concave convex texture；The dedusting plate and the dedusting frame are square, are round or oval；
PTFE microporous barriers one or both sides are covered with backing material.
Second gas outlet on the purging plate is provided with valve, for controlling the opening/closing of the gas vent.
Further, when the deduster is in the dedusting stage, dust and gas enters the dust and gas inlet channel, via described
Dust and gas import enters in the dedusting frame, respectively by the PTFE microporous barriers of both sides, then through the adjacent dedusting plate and
The purging plate flows to the first gas outlet and second gas outlet is drained, and dust is then trapped within the dedusting frame
It is interior；When deduster is in purge stages, purge gass enter the purge gass inlet channel, enter via the purge gass import
The enclosure space of the two sides and PTFE microporous barriers composition of the purging plate closes described the second of the purging plate lower end
Gas vent, purge gass are each passed through under the driving of pressure difference in the one layer of PTFE microporous barrier and the dedusting frame of both sides
Then entire dust layer crosses another layer PTFE microporous barriers again, most the first gas outlet through the dedusting plate lower end afterwards
Discharge.
Gas separation unit includes two-stage or more grade PDMS membrane separators, for example, can be by two-stage PDMS membrane separator strings
Connection.
Gas separation unit uses rolling PDMS film gas separators；Seperation film can be PDMS/PEI composite membranes.The present invention
Gas separation unit also can be used plate film assembly or hollow fiber film assembly, seperation film still uses PDMS/PEI compound
Film.
Gas separation unit uses rolling PDMS film gas separators, including tablet diaphragm to be entwined around central tube；
Wherein, the tablet diaphragm includes the separation net being sequentially overlapped from top to bottom, seperation film and supporting layer；
The separation net is grid aperture has flexible material composition in 0.5-1.5cm, to be gas feed
Mutually and ooze the remaining mutually offer flowing space；The seperation film is that PDMS (dimethyl silicone polymer) and PEI (polyetherimide) is formed
Asymmetry composite membrane, wherein PDMS layer be separating layer, PEI be porous support layer (aperture 10-100um)；Supporting layer is tool
The grade duct material for having intensity, to ensure the intensity of diaphragm.
Gas backstreaming unit includes reflux wind turbine and return line, can flexible modulation reflux ratio as needed, reflux ratio
Adjustable extent be 0-1；
The piece-rate system of the present invention is by PTFE film deduster, two-stage PDMS membrane separators and gas circulation reflux phase
In conjunction with to reach the part CO in removal synthesis gas or natural gas2And adjustment CO is required according to subsequent technique2The gas of concentration requirement
Piece-rate system.
Advantageous effect
The present invention is by by the dedusting of PTFE microporous membrane materials and PDMS composite membranes CO2Trapping separator has carried out organic knot
It closes.It has the following advantages that：It is dusted by PTFE microporous barriers, has energy consumption small, dedusting is stablized, and dust removal efficiency is high, no blocking etc.
The advantages that advantage, high temperature resistant is corrosion-resistant, and surface is smooth, stable operation, the operation cycle is long；It can by the dedusting of PTFE microporous barriers
So that micron-sized dust is removed, to effectively reduce dust in the duct of rolling gaseous jet simulation device and film surface
Accumulation；And then the resistance of Membrane Gas Separation Processes is significantly reduced, it increases gas treatment amount and extends rolling gas film
The service life of separator.By controlling gas backstreaming ratio, CO in gaseous product can be realized2The control of concentration can adapt to each
Kind occasion is for CO2The different of concentration require.
Separation phase of the present invention uses rolling PDMS membrane separators, has compared with traditional separation method and divides
From efficient, the advantages such as separating energy consumption is small, and equipment is simple, and non-secondary pollution, operating condition is mild, and operating cost is low.The present invention
By using two-stage gas separator, it is effectively improved the separative efficiency of gas, reduces CO in gas2Concentration, from
And reduce the energy consumption and gas load of subsequent technique.
The present invention uses reflux in gas separation phase, so as to by adjust reflux ratio, to adjust product
Middle CO2Concentration, to meet the requirement of various subsequent productions.
Description of the drawings
Fig. 1 is CO in removing natural gas or synthesis gas according to the present invention2Gas separation system schematic diagram；
Fig. 2 is the schematic diagram of plate and frame PTFE film deduster structure；With
Fig. 3 is the schematic diagram of rolling PDMS film gas separator structures.
Specific implementation mode
Below in conjunction with attached drawing to CO in the removing natural gas or synthesis gas of the present invention2Gas separation system retouched
It states.
Fig. 1 is CO in removing natural gas or synthesis gas according to the present invention2Gas separation system schematic diagram.
Referring to Fig.1, CO in removing natural gas or synthesis gas according to the present invention2Gas separation system include：Plate and frame
PTFE film deduster 1, level-one PDMS films gas separator 2, two level PDMS films gas separator 3, gas backstreaming unit 4, charging
Phase 5 oozes remaining phase 6 and infiltration phase 7.
As shown in Fig. 2, the plate and frame PTFE film deduster includes one or more dedusting structure；The dedusting structure
For the enclosure space that dedusting plate 14, dedusting frame 13 and the purging connection of plate 19 are formed, blown according to 14-dedusting of dedusting plate frame 13-
The sequence for sweeping 13-dedusting plate of plate 19-dedusting frame 14 assembles successively, is empty frames among the dedusting frame, and both sides have PTFE (poly-
Tetrafluoroethene) covering of microporous barrier 17；The dedusting plate and the purging plate are longitudinal section solid separator in the shape of an " I ", plate
The dedusting plate of frame deduster, dedusting frame and purging plate are generally square, in addition, dedusting plate and dedusting frame can also be rectangular
The routine geometric figure such as shape, circle or ellipse.The end of the dedusting plate, the dedusting frame and the purging plate is provided with
Air inlet/outlet, the air inlet/outlet can be circular hole, elliptical aperture, square hole or slot, dress closes, compress after can structure
At the channel passed in and out for dust and gas, purified gas and purge gass.The dedusting plate 14, the dedusting frame 13 and the purging plate 19
Upper end be all provided with the hole there are two angle end, the hole at upper left corner end constitutes dust and gas inlet channel 15, the hole at upper right corner end
Purge gass inlet channel is constituted, the dust and gas inlet channel 15 and the purge gass inlet channel are not connected, the dedusting plate
14, the lower end of the dedusting frame 13 and the purging plate 19 is equipped with hole, constitutes outlet passageway 16；The dust and gas air inlet is logical
It is mutually isolated between road, the purge gass inlet channel and the outlet passageway；The hole at the upper right corner end of the dedusting frame
The position at middle part is equipped with dark holes as dust and gas import 115 in a thickness direction, and the hole at the upper left corner end of the purging plate exists
The position at both ends is equipped with dark holes as purge gass import on thickness direction, and the hole of the lower end of the dedusting plate is leaned in a thickness direction
The position of the end of nearly dedusting frame is equipped with the Kong Hou that dark holes exports the lower end of 116a and the purging plate as first gas
The position for spending both ends on direction exports 116b equipped with dark holes as second gas, the lower end of the purging plate in purge stages
Second gas exports 116b and closes.
The both sides of the dedusting frame are covered by PTFE microporous barriers 17, while being covered with backing material 18 in the both sides of microporous barrier,
Empty frames and covering material define the space for accommodating flue gas and dust.
When the deduster is in the dedusting stage, it is logical that dust and gas enters the dust and gas air inlet under specified operating pressure
Road, via the i.e. described dust and gas of dark holes that is equipped with of position at the hole middle part in a thickness direction at the upper right corner end of the dedusting frame
Import 115 enters in the dedusting frame 13, respectively by the PTFE microporous barriers 17 of both sides, then through the adjacent dedusting plate 14
And the purging plate 19 flows to each described gas vent 116a, 116b and drains, dust is then retained in frame；Wait for the dedusting
After dust layer in frame 13 reaches certain thickness, that is, stop dedusting.The purification of each gas vent 116a, 116b outflow
Gas is discharged after coming together in outlet passageway 16.
In order to extend the production cycle of deduster, after the dust layer in frame reaches certain thickness, it is necessary to dust
Layer is purged.When deduster is in purge stages, purge gass are pressed into the purge gass inlet channel, via the purging
Described in the i.e. described purge gass import of the dark holes that the position at the hole at the upper left corner end of plate both ends in a thickness direction is equipped with enters
The enclosure space for purging the two sides and the PTFE microporous barriers 17 composition of plate 14 closes the gas of the purging plate lower end
Export 116b, purge gass are each passed through one layer of PTFE microporous barrier 17 of both sides under the driving of pressure difference and entire described remove
Then dust layer in dirt frame 13 crosses another layer PTFE microporous barriers 17, the most institute afterwards through 14 lower end of the dedusting plate again
State gas vent 116a discharges.
The deduster further includes bearing 11, is connect with the gland 12 of deduster, is used to support the deduster.
As shown in figure 3, gas separation unit uses rolling PDMS film gas separators, it is in being surrounded by a tablet diaphragm
What heart pipe 22 was entwined.Wherein, per tunic piece include the separation net 21 being sequentially overlapped from top to bottom, seperation film 23 and support
Layer 24.Separation net is grid aperture has flexible material composition in 0.5-1.5cm, so as to gas feed phase 5 and to ooze
Remaining phase 6 provides the flowing space；Seperation film is asymmetric to be made of PDMS (dimethyl silicone polymer) and PEI (polyetherimide)
Property composite membrane；Wherein PDMS layer is separating layer, and PEI is porous support layer (aperture 10-100um)；Supporting layer is with intensity
Grade duct material, to ensure the intensity of diaphragm.In gas separation process, phase 5 is usually fed in an axial direction from membrane separator
One end enters, and is flowed in the separation net among two membranes, CO2Isopreference is through component (infiltration phase 7) under the driving of pressure difference
Through seperation film, it is then pooled to outflow in central tube；And it oozes remaining phase 6 and is then flowed out in the other end of membrane separator.
Embodiment
Embodiment 1
Group becomes 50%CH4, 50%CO210000kmol/h contain CO2Natural gas in containing 1% dust, first
After plate and frame PTFE film deduster, the removal efficiency of dust can reach 98%, and gas is 2m in two-stage membrane area2Film
Under the centrifugation of component, when reflux ratio is 0, the flow for oozing remaining phase 6 is 4100kmol/h, CO2Composition drops to 17%, when
When reflux ratio is 1, it is 2945kmol/h, CO to ooze 6 flow of remaining phase2Composition drops to 13%.
Embodiment 2
Group becomes 5%CH4, 30%CO, 30%H2And 35%CO210000kmol/h synthesis gas in containing 1% dust,
First by plate and frame PTFE film deduster after, the removal efficiency of dust is 98%, and gas is 2m in two-stage membrane area2Membrane module
Centrifugation under, when reflux ratio is 0, the flow for oozing remaining phase 6 is 5339kmol/h, and gas group becomes 6.34% CH4,
46.24%CO, 38.06%H2, 9.4%CO2, when reflux ratio is 1, it is 4159kmol/h to ooze 6 flow of remaining phase, and gas group becomes
6.15%CH4, 50.43%CO, 36.94%H2, 6.46%CO2。
Compared with the membrane separation device applied at present, piece-rate system of the invention is added in the front end of gas separation unit
PTFE microporous barrier cleaners, so as to effectively avoid a large amount of dust in natural gas and synthesis gas to its gas separation system
Pollution；Meanwhile present invention employs two-stage piece-rate systems and gas circulation reflux, it can be by controlling gas backstreaming ratio
To adjust CO in gas2Concentration, to meet different production requirements.
Claims (3)
1. CO in a kind of removing synthesis gas/natural gas2Piece-rate system, the piece-rate system includes：Dust removing units, gas separation
Unit and gas reflux unit；Wherein, the dust removing units are connected with gas separation unit, and gas backstreaming unit is detached with gas
Unit joins end to end to form gas circulation channel,
The gas backstreaming unit includes reflux wind turbine and return line, wherein the adjustable extent of reflux ratio is 0-1, to adjust
CO in product2Concentration；
The dust removing units use plate and frame PTFE film deduster, wherein the plate and frame PTFE film deduster include one or
The multiple dedusting structures of person；The dedusting structure is that dedusting plate (14), dedusting frame (13) and purging plate (19) connect the envelope formed
Space is closed, according to the sequence group successively of dedusting plate (14), dedusting frame (13), purging plate (19), dedusting frame (13), dedusting plate (14)
Dress；It is empty frames among the dedusting frame, there are PTFE microporous barriers (17) covering in both sides；The dedusting plate (14) and the purging
Plate (19) is longitudinal section solid separator in the shape of an " I "；The dedusting plate (14), the dedusting frame (13) and the purging
The upper end of plate (19) is equipped with dust and gas inlet channel (15) and purge gass inlet channel, the dedusting plate (14), the dedusting frame
(13) and the lower end of the purging plate (19) is equipped with outlet passageway (16)；The dust and gas inlet channel (15), the purging
It is mutually isolated between gas inlet channel, the outlet passageway (16) and the enclosure space；The dirt of the dedusting frame (13)
Gas inlet channel is equipped with the dark holes communicated with the empty frames, as dust and gas import；The purge gass of the purging plate (19)
Inlet channel both ends are equipped with the dark holes communicated with described purging plate (19) inner space, as purge gass import；The dedusting plate
(14) outlet passageway is equipped with the dark holes communicated with the dedusting plate inner space, and (116a) is exported as first gas；With
And the both ends of the outlet passageway of the purging plate (19) are equipped with the dark holes communicated with the purging plate inner space, as the second gas
Body exports (116b)；The second gas port closing in purge stages；
The gas separation unit includes two-stage or more grade PDMS membrane separators；The PDMS membrane separators are rolling PDMS films
Gas separator, the rolling PDMS film gas separators are entwined around central tube (22) by tablet diaphragm；Wherein, institute
It includes the separation net (21) being sequentially overlapped from top to bottom, seperation film (23) and supporting layer (24) to state tablet diaphragm；The separation net
(21) in 0.5-1.5cm there is flexible material to form by grid aperture；Seperation film is to be by PDMS separating layers and aperture
The asymmetry composite membrane of the PEI compositions of 10-100um.
2. piece-rate system according to claim 1, wherein PTFE microporous barriers one or both sides are covered with backing material
(18)。
3. piece-rate system according to claim 1, wherein the gas separation unit uses plate film assembly or hollow fibre
It ties up membrane module and substitutes rolling PDMS film gas separators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410835761.9A CN104449925B (en) | 2014-12-26 | 2014-12-26 | Remove CO in synthesis gas/natural gas2Piece-rate system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410835761.9A CN104449925B (en) | 2014-12-26 | 2014-12-26 | Remove CO in synthesis gas/natural gas2Piece-rate system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104449925A CN104449925A (en) | 2015-03-25 |
| CN104449925B true CN104449925B (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410835761.9A Active CN104449925B (en) | 2014-12-26 | 2014-12-26 | Remove CO in synthesis gas/natural gas2Piece-rate system |
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| CN110760354B (en) * | 2019-10-31 | 2021-01-05 | 广东石油化工学院 | Biogas purification and purification device for livestock and poultry manure biogas digester |
| CN113262647B (en) * | 2021-05-13 | 2022-05-24 | 湖南二零八先进科技有限公司 | Filter membrane for getter dust isolation and manufacturing method thereof |
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| US5256295A (en) * | 1990-12-28 | 1993-10-26 | Membrane Technology & Research | Two-stage membrane process and apparatus |
| CN101028579A (en) * | 2006-11-12 | 2007-09-05 | 张晓忠 | Method for purifying marsh gas by membrane separating technology |
| CN101671585A (en) * | 2008-09-09 | 2010-03-17 | 谭文英 | Method for preparing vehicle fuel similar to natural gas by impurity removal and purification of marsh gas in composite separation mode |
| CN102872684A (en) * | 2011-11-17 | 2013-01-16 | 黑龙江省森林工程与环境研究所 | Film device for synchronously separating and purifying methane and carbon dioxide in biogas |
| CN103232871A (en) * | 2013-05-08 | 2013-08-07 | 山西汾西机电有限公司 | Methane purification system and methane purification technology thereof |
| CN104028064B (en) * | 2014-03-07 | 2015-10-28 | 北京神雾环境能源科技集团股份有限公司 | Plate and frame PTFE film deduster |
| CN204434571U (en) * | 2014-12-26 | 2015-07-01 | 北京神雾环境能源科技集团股份有限公司 | Remove the separation system of CO2 in synthetic gas and Sweet natural gas |
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