CN109694073A - Double high technologies of UF membrane high purity carbon monoxide and hydrogen in conjunction with pressure-variable adsorption - Google Patents
Double high technologies of UF membrane high purity carbon monoxide and hydrogen in conjunction with pressure-variable adsorption Download PDFInfo
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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
- C01B32/00—Carbon; Compounds thereof
- C01B32/40—Carbon monoxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
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- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
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- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0405—Purification by membrane separation
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- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/042—Purification by adsorption on solids
- C01B2203/043—Regenerative adsorption process in two or more beds, one for adsorption, the other for regeneration
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- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0465—Composition of the impurity
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- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0465—Composition of the impurity
- C01B2203/048—Composition of the impurity the impurity being an organic compound
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Abstract
The present invention provides double high technologies of a kind of UF membrane high purity carbon monoxide and hydrogen in conjunction with pressure-variable adsorption, it will be enriched in the mixed gas (unstripped gas) of hydrogen, carbon monoxide and a small amount of impurity gas composition, after impurity component a small amount of in pretreatment removing gas, into UF membrane and pressure swing adsorption cycles system, under the two efficient combination, while high-purity carbon monoxide and hydrogen, the high yield of product carbon monoxide and product hydrogen is improved.The technique carbon monoxide and density of hydrogen are high, while the high income of carbon monoxide and hydrogen.
Description
Technical field
The invention belongs to employee's unstripped gas separating-purifying fields, and in particular to the work of high purity carbon monoxide and hydrogen
Skill.
Background technique
Producing synthesis gas from coal, the blast furnace gas of metallurgy, converter gas contain the high-grades gas resource such as hydrogen, carbon monoxide, should
Resource, by carbonylation, can synthesize the high added values Organic Chemicals such as alcohols, acids in chemical field.These
Before synthetic reaction, it is required to carry out separating-purifying to gas.Gas separation has cryogenics, Dry Adsorption technology, wet process
Absorption techniques, membrane separation technique etc..Gas separation is applied to commercial plant, on the basis of long period, safe and stable operation
On, it is this that synthesis gas, grade about gas separation, which meets energy consumption simultaneously, invests the high requirement of low, hydrogen, carbonomonoxide concentration,
Field needs the problem for studying for a long period of time and capturing.
The blast furnace gas in producing synthesis gas from coal and metallurgy industry, the converter gas generated in research coal chemical industry, produces highly concentrated one
Carbonoxide, hydrogen make full use of resource, save the cost, and produce for reducing exhaust gas discharge for synthesis alcohols, acids, ethers etc.
Product all have significance.
Summary of the invention
A kind of the purpose of the present invention is to provide UF membranes in conjunction with pressure-variable adsorption high purity carbon monoxide and hydrogen
Double high technologies, the technique carbon monoxide and density of hydrogen are high, while the high income of carbon monoxide and hydrogen.
This forwarding method will be enriched in the mixed gas (unstripped gas) of hydrogen, carbon monoxide and a small amount of impurity gas composition, by pre-
In processing removing gas after a small amount of impurity component, into UF membrane and pressure swing adsorption cycles system, under the two efficient combination,
While high-purity carbon monoxide and hydrogen, the high yield of product carbon monoxide and product hydrogen is improved.
Gas separation is applied to commercial plant, on the basis of long period, safe and stable operation, for existing synthesis
Gas, grade about gas separation, while meeting energy consumption, investing the high requirement of low, hydrogen, carbonomonoxide concentration.
The working principle of film separation system be exactly select " to filter " feeding gas using a kind of high molecular polymer film and
Achieve the purpose that separation.When two or more admixture of gas passes through thin polymer film, each gas component is polymerizeing
The difference of dissolution diffusion coefficient in object, causes it to penetrate through the rate of membranous wall difference.
Membrane separation process is mainly characterized by without phase-change, and low energy consumption, and unit scale is changeable according to the requirement for the treatment of capacity, and
And the advantages that equipment is simple, and easy and safe to operate, starting is fast, and operational reliability is high, free from environmental pollution, small investment, purposes is wide.By
Gas, can be divided into fast gas and permeate gas (such as H by this2O、H2, He etc.) and slow gas, that is, impermeable gas (such as N2、CH4And other hydro carbons
Deng).Fast atmospheric pressure reduces, and slow gas maintains operating pressure.
Pressure swing adsorption is to the physical absorption of gas molecule using adsorbent (porosu solid substance) interior surface as base
Plinth is easily adsorbed high boiling component at the same pressure using adsorbent, is not easy to adsorb low boiling component and lower adsorbance increasing of pressurizeing
Add (absorbed component), depressurize the characteristic that lower adsorbance reduces (desorption component).Unstripped gas is passed through into adsorbent under a certain pressure
Bed, the high-boiling-point impurity component relative to hydrogen are selectively adsorbed, and the hydrogen of low boiling component is not easy to adsorb and pass through adsorbent
Bed reaches the separation of hydrogen and impurity composition.Then desorbing the impurity composition being adsorbed under reduced pressure regenerates adsorbent,
In favor of carrying out adsorbing separation impurity again next time.Adsorbing contaminant purifying hydrogen of hydrogen, the lower desorption of impurities of decompression make to inhale under this pressurization
Attached dose of regenerated circulation is pressure-swing absorption process.It is possible thereby to mutually obtain product gas with adsorbate from absorption.Adsorb the production of phase
Product gas has CO, CO2Deng, pressure reduction, adsorbate product gas H2, suitable with adsorptive pressure.
Pressure swing adsorption is applied to hydrogen manufacturing, has the following advantages.
(1) product hydrogen purity is high, up to 99.0%~99.9999%.
(2) process flow is short, and high degree of automation, reliability and flexibility are good, and driving and parking is convenient.
(3) it moves equipment to reduce, consumption is low, is easily managed and repairs.
The two common feature is physical process, and low energy consumption, and working pressure range is larger.According to working condition, it is conceived to
Fast gas, slow gas, absorption phase, adsorbate, cause concentration to change, by reasonable operating pressure, by two according to respective pressure change
Kind of technology organically combines, and utilizes respective working efficiency to greatest extent, obtain high concentration hydrogen, carbon monoxide when, pressure potential
The loss of energy is minimum, and consume energy low, high income.
According to the difference of carbon monoxide in material mixed gas and the volume components percentage of hydrogen, select membrane separation technique or
Two different combinations of pressure swing adsorption carry out, first is that first carrying out UF membrane is carrying out pressure-variable adsorption, first is that advanced
Row pressure-variable adsorption carries out UF membrane again.
Double senior engineers of the first UF membrane provided by the invention high purity carbon monoxide and hydrogen in conjunction with pressure-variable adsorption
Skill, the relatively high unstripped gas of this method carbon monoxide content suitable for unstripped gas, specifically includes the following steps:
(1) pass through a small amount of impurity component in pretreatment removing unstripped gas, including CH3OH、NH3,CNC,DME；
(2) pretreated unstripped gas sequentially enters Multistage Membranes separation process and extracts carbon monoxide, except afterbody film point
From outer, the high-pressure osmosis gas of every level-one UF membrane enters pressure-variable adsorption process and extracts hydrogen, and impermeable gas enters next stage film point
From, the low-pressure permeability gas of afterbody UF membrane or after it mixes with the resolution gas after pressure-variable adsorption, through direct weighting or pressurization
After removing the foreign gas other than hydrogen and carbon monoxide gas, first order UF membrane process is returned, forms closed cycle process；
Or step (2) are as follows: pretreated unstripped gas sequentially enters Multistage Membranes separation process and extracts carbon monoxide, every level-one
The high-pressure osmosis gas of UF membrane enters corresponding pressure-variable adsorption process and extracts hydrogen, and impermeable gas enters next stage UF membrane, most
The impermeable gas of rear stage UF membrane obtains carbon monoxide product through decompression；The resolution gas of upper level pressure-variable adsorption returns to next stage
Pressure-variable adsorption mixes with the infiltration gas of this grade and extracts hydrogen again, and the resolution gas of afterbody pressure-variable adsorption is pressurized to return to the
Level-one UF membrane process, forms closed cycle process, and pressure-variable adsorptions at different levels obtain product hydrogen.
Further, the UF membrane process is divided into 2-3 grades of UF membrane processes, it is at different levels between connect.
Further, in unstrpped gas carbon monoxide volumetric concentration be 15%~80%, hydrogen volume concentration be 80%~
When 10%, the volumetric concentration of foreign gas is 0~1% range.
Further, UF membrane working pressure range be 4MPaG~10MPaG, pressure-variable adsorption operating pressure be 0.3~
3.0MPaG.The high pressure of UF membrane process sees through atmospheric pressure range: 0.3~3.0MPa；Low pressure sees through atmospheric pressure range: <
0.3MPa.It is chosen whether carrying out next stage pressure-variable adsorption link according to infiltration atmospheric pressure range.
According to the gas content in gaseous mixture in addition to hydrogen and carbon monoxide, high-pressure osmosis atmospheric pressure is pressure-variable adsorption pressure
Power, after low-pressure permeability gas is mixed with Utilization of PSA Relief Gas, by direct weighting or pressurization removing hydrogen and carbon monoxide gas with
Film separation system is returned after outer foreign gas.
Double senior engineers of second of UF membrane provided by the invention high purity carbon monoxide and hydrogen in conjunction with pressure-variable adsorption
Skill, the relatively high unstripped gas of this method hydrogen content suitable for unstripped gas, specifically includes the following steps:
(1) pass through a small amount of impurity component in pretreatment removing unstripped gas, including CH3OH、NH3,CNC,DME；
(2) pretreated unstripped gas enters pressure-variable adsorption process extraction hydrogen, and stripping gas after pressurization by sequentially entering
Multistage Membranes separation process extracts carbon monoxide, and the high-pressure osmosis gas of UF membranes at different levels is back to pressure-variable adsorption process, forms enclosed
Circulation process, impermeable gas enter next stage UF membrane, and the impermeable gas of afterbody UF membrane rises for carbon monoxide product.
Further, the UF membrane process is divided into 2-3 grades of UF membrane processes, it is at different levels between connect.
According to the gas content in gaseous mixture in addition to hydrogen and carbon monoxide, pressure-variable adsorption pressure is high-pressure osmosis air pressure
Power, after low-pressure permeability gas is mixed with Utilization of PSA Relief Gas, by direct weighting or pressurization removing hydrogen and carbon monoxide gas with
Pressure swing adsorption system is returned after outer foreign gas.
Further, in gaseous mixture carbonomonoxide concentration (percentage by volume) in 2%~15%, density of hydrogen (volume hundred
Score) at 80%~98% (the high lowest limit correspondence problem of value range), it is combined using second of pressure-variable adsorption with UF membrane circulation
The closed cycle process that technology is formed.
Further, pressure-variable adsorption operating pressure be 0.3~3.0MPaG, UF membrane working pressure range be 4MPaG~
10MPaG.High-pressure osmosis atmospheric pressure range: 0.3~3.0MPa.
According to the gas content in gaseous mixture in addition to hydrogen and carbon monoxide, pressure-variable adsorption pressure is high-pressure osmosis air pressure
Power, after low-pressure permeability gas is mixed with Utilization of PSA Relief Gas, by direct weighting or pressurization removing hydrogen and carbon monoxide gas with
Pressure swing adsorption system is returned after outer foreign gas.
Further, in both the above method, the CO gas of afterbody UF membrane is obtained through decompression, purification process
To the carbon monoxide product gas of high-purity.
Further, the purification treating method is to wait until high-purity CO using cryogenics or adsorption technology.
Further, in both the above method, the pretreatment is removed by temp.-changing adsorption or condensation technology etc.
Contain the impurity harmful to film, the special adsorbent of pressure-variable adsorption in unstripped gas.
The present invention relates to the hydrogen and carbon monoxide process of producing high concentration rich in hydrogen and Co mixed gas,
It produces a highly concentrated oxygen mainly for blast furnace gas, the converter gas in the producing synthesis gas from coal and metallurgy industry generated in coal chemical industry
Change carbon, hydrogen.High-concentration carbon monoxide, hydrogen and other elements pass through synthetic reaction, generate the products such as alcohols, acids, ethers.
Such as ethyl alcohol, ethylene glycol, acetic acid, dimethyl ether.
The method of the invention formulates UF membrane series according to unstripped gas operating condition.UF membrane series is to one using 2 grades
Grade optimization, causes concentration to change using pressure change, takes full advantage of pressure potential, adjusts CO, H2 concentration ratio in gas and closes
System；The first order permeates atmospheric pressure and determines that this pressure is dynamic value by pressure swing adsorption feature and infiltration gas concentration, determines whole
Product quality and yield, the efficiency of a system production.UF membrane infiltration gas, stripping gas are effectively recycled according to operating condition, entirely
Process forms closed cycle, improves system CO, H2 yield, reduces energy consumption.Intensive closed cycle flow technologies adapt to unstripped gas
Concentration variation range air source, ensure that device long-period stable operation.
Compared with prior art, the invention has the following advantages:
1. the method for the invention produces carbon monoxide and density of hydrogen is high, while the high income of carbon monoxide and hydrogen.
2. the method for the invention is by the setting of Multistage Membranes separation process, and by UF membrane process and pressure-variable adsorption process
Closed cycle is formed, the utilization rate of unstripped gas and the yield of product are improved.
3. the method for the invention, according to the difference of hydrogen in unstripped gas and carbon monoxide content, flexible choice separation system
Standby mode, the blast furnace gas in producing synthesis gas from coal and metallurgy industry, the converter gas generated suitable for coal chemical industry are produced highly concentrated
Carbon monoxide, hydrogen, for products such as synthetic reaction alcohols, acids, ethers, meanwhile, equipment requirement is low, simple process,
Suitable for industrial application.
Detailed description of the invention
Fig. 1 is the process flow chart of embodiment 1.
Fig. 2 is the process flow chart of embodiment 2.
Fig. 3 is the process flow chart of embodiment 3.
Fig. 4 is the process flow chart of embodiment 4.
Specific embodiment
Below by specific embodiment, the present invention will be further described.
In following embodiment, the equipment that each process uses, such as variable-pressure adsorption equipment, membrane separation plant is existing equipment.
Embodiment 1
1, unstripped gas condition
Unstripped gas is divided into two strands, one is the decontaminating syngas that Shaanxi Xinghua Ji Tuanlao factory provides, by surge tank
Enter the complete set of equipments afterwards；Another stock is the rich CO tail gas that ethyl alcohol synthesizer generates, and enters after compression by UF membrane and becomes
Press the complete set of equipments of adsorption technology composition.Satisfactory product gas is obtained after this complete gas separation equipment separation.
Unstripped gas into the present apparatus is divided into two parts, and specification difference is as follows:
(1), decontaminating syngas specification
Decontaminating syngas dosage is determined according to the technique and separation yield of technology provider.
(2), richness CO tail gas specification
Rich CO tail gas amount are as follows: 1740NM3/h
2, process implementing main points
This process is with condition: raw gas pressure is taller and bigger, and in 4.5MPa, and in unstripped gas, carbon monoxide content is higher.
The key of this process implementing is first is that pretreatment process；Second is that by 2 grades of UF membranes；Third is that first order UF membrane permeates
Gas is handled by pressure swing adsorption purge；Fourth is that UF membrane infiltration gas direct weighting in the second level returns first order UF membrane entrance.
Pretreated main purpose is that objectionable impurities gas is removed in unstripped gas, main component CH3OH、NH3、
CNC、DME、N2Deng reducing its harm to adsorbent.It is required that enter UF membrane before harmful components be less than 1000ppm hereinafter,
It can guarantee film and pressure-swing absorption apparatus operation steady in a long-term in this way.
By pretreated unstripped gas, the carbon monoxide product gas of high concentration is obtained into 2 grades of UF membranes.
First order film infiltration gas obtains high concentration product hydrogen by pressure-variable adsorption separation purpose.Its stripping gas is sent to torch
System.
The process features are first is that UF membrane and pressure-variable adsorption are combined into closed cycle process, second is that second level UF membrane permeates
Gas direct weighting returns to first order UF membrane import；Third is that 2 grades of UF membranes obtain carbon monoxide product gas.
Whole flow process obtains the carbon monoxide product gas and hydrogen of high concentration, and the yield of hydrogen and CO gas
It is high.
3, process implementing effect
Qualified product gas is produced by the complete set of equipments, product gas is respectively carbon monoxide and hydrogen, is used for ethyl alcohol
Synthesizer, specification are as follows:
| Serial number | Product gas title | Purity requirement | Product volume (normal/maximum) | Yield |
| 1 | Carbon monoxide | >=95.0mol% | 8000/9600NM3/h | 95~100% |
| 2 | Hydrogen | 95~99mol% | 15500/18600NM3/h | 95~100% |
Embodiment 2
1, unstripped gas condition
Unstripped gas is the gas rich in CO, the closed cycle process formed through membrane separation and pressure swing adsorption it is complete
Gas separation equipment obtains satisfactory product gas after separation.
Unstripped gas specification into the present apparatus is as follows:
2, process implementing main points
This process is with condition: raw gas pressure is taller and bigger, and in 4.5MPa, and in unstripped gas, carbon monoxide content is higher.
The key of this process implementing is first is that pretreatment process, purification process；Second is that 2 grades of UF membranes；Third is that first order film point
It is handled from infiltration gas by pressure-variable adsorption；Fourth is that second level UF membrane infiltration gas and pressurization rear stage Utilization of PSA Relief Gas are mixed
It closes, is handled using pressure-variable adsorption.
Pretreated main purpose is that objectionable impurities gas is removed in unstripped gas, main component CH3OH、NH3、
CNC、DME、N2Deng reducing its harm to adsorbent.It is required that enter UF membrane section harmful components be less than 1000ppm hereinafter,
It can guarantee device operation steady in a long-term in this way.The main purpose of purification process is the CH during removing secondary membrane is worked off one's feeling vent one's spleen4Contain
It measures, to meet ethyl alcohol, ethylene glycol production requirement.
By pretreated unstripped gas, the carbon monoxide product gas of high concentration is obtained into 2 grades of UF membranes.
First order UF membrane permeates gas and passes through the isolated product hydrogen of pressure-swing absorption apparatus；
First order UF membrane infiltration gas is pressurized to second level UF membrane infiltration atmospheric pressure by the stripping gas of pressure-swing absorption apparatus,
It is mixed with second level UF membrane infiltration gas, after pressure-variable adsorption separates, obtains product hydrogen.And stripping gas pressurization returns to the first order
UF membrane import.
By this closed cycle process flow, the yield of hydrogen and CO gas is in a high position.
3, process implementing effect
Qualified product gas is produced by the complete set of equipments, product gas is respectively carbon monoxide and hydrogen, is used for second two
Alcohol synthesizer, specification are as follows:
Embodiment 3
1, unstripped gas condition
Unstripped gas is the gas rich in CO, the closed cycle process formed through membrane separation and pressure swing adsorption it is complete
Gas separation equipment obtains satisfactory product gas after separation.
Unstripped gas specification into the present apparatus is as follows:
2, process implementing main points
This process is with condition: raw gas pressure is taller and bigger, and in 4.5MPa, and in unstripped gas, carbon monoxide content is higher.
The key of this process implementing is first is that pretreatment process and purification process；Second is that 2 grades of UF membranes；Third is that first order film point
It is handled from infiltration gas by pressure-variable adsorption, stripping gas direct weighting to raw gas pressure；Fourth is that UF membrane infiltration gas in the second level adds
Push back first order UF membrane entrance.
Pretreated main purpose is that objectionable impurities gas is removed in unstripped gas, main component CH3OH、NH3、
CNC、DME、N2Deng, it is desirable that the harmful components into UF membrane section are less than 1000ppm hereinafter, can guarantee that package unit is long in this way
Phase stable operation.The main purpose of purification process is the CH during removing secondary membrane is worked off one's feeling vent one's spleen4Content, to meet ethyl alcohol, second two
Alcohol production requirement.
By pretreated unstripped gas, the carbon monoxide product gas of high concentration is obtained into 2 grades of UF membranes.
First order UF membrane permeates gas and passes through the isolated product hydrogen of pressure-swing absorption apparatus.Its stripping gas direct weighting to original
Atmospheric pressure is expected, into first order UF membrane import.
UF membrane infiltration gas in the second level is pressurized to raw gas pressure, returns to first order UF membrane entrance.
By this closed loop process, the yield of hydrogen and CO gas is greatly improved.
3, process implementing effect
Qualified product gas is produced by the complete set of equipments, product gas is respectively carbon monoxide and hydrogen, is used for second two
Alcohol synthesizer, specification are as follows:
Embodiment 4
1, unstripped gas condition
Unstripped gas be the gas rich in CO, by pressure-variable adsorption and UF membrane composition closed cycle process composed by
Satisfactory product gas is obtained after set gas separation equipment separation.
Unstripped gas specification into the present apparatus is as follows:
2, process implementing main points
This process is with condition: raw gas pressure is lower than 2.5MPa, and carbon monoxide content is lower in unstripped gas.
The key of this process implementing is first is that pretreatment process and purification process；Second is that first pressure swing adsorption hydrogen production；Third is that transformation
The pressurization of adsorption-desorption gas is entered 2 grades of membrane separation devices；Fourth is that UF membrane infiltration gas returns to pressure-variable adsorption import.
Pretreated main purpose is that objectionable impurities gas is removed in unstripped gas, main component CH3OH、NH3、
CNC、DME、N2Deng reducing its harm to adsorbent.It is required that enter pressure-variable adsorption section harmful components be less than 1000ppm with
Under, it can guarantee adsorbent operation steady in a long-term in this way.The main purpose of purification process is the outlet of removing second level UF membrane
CH in gas4Content, to meet ethylene glycol production requirement.
Pressure swing adsorption hydrogen production obtains product hydrogen.
Enter 2 grades of membrane separation devices after Utilization of PSA Relief Gas pressurization, the infiltration gas of membrane separation device returns to pressure-variable adsorption
Import.
Pressure-variable adsorption and the formed closed cycle process of UF membrane, obtain the hydrogen and CO gas of high concentration, and
Yield is high.
3, process implementing effect
By complete set of equipments composed by the closed cycle process of pressure-variable adsorption and UF membrane composition, qualified production is produced
Product gas, product gas are respectively carbon monoxide and hydrogen, are used for ethylene glycol synthesizer, specification is as follows:
Claims (10)
1. double high technologies of a kind of UF membrane high purity carbon monoxide and hydrogen in conjunction with pressure-variable adsorption, which is characterized in that tool
Body the following steps are included:
(1) pass through a small amount of impurity component in pretreatment removing unstripped gas, including CH3OH、NH3,CNC,DME；
(2) pretreated unstripped gas sequentially enters Multistage Membranes separation process and extracts carbon monoxide, in addition to afterbody UF membrane,
The high-pressure osmosis gas of every level-one UF membrane enters pressure-variable adsorption process and extracts hydrogen, and impermeable gas enters next stage UF membrane, most
The low-pressure permeability gas of rear stage UF membrane or after it mixes with the resolution gas after pressure-variable adsorption, removes through direct weighting or pressurization
After foreign gas other than hydrogen and carbon monoxide gas, first order UF membrane process is returned, forms closed cycle process；
Or step (2) are as follows: pretreated unstripped gas sequentially enters Multistage Membranes separation process and extracts carbon monoxide, every level-one film point
From high-pressure osmosis gas enter corresponding pressure-variable adsorption process and extract hydrogen, impermeable gas enters next stage UF membrane, last
The impermeable gas of grade UF membrane obtains carbon monoxide product through decompression；The resolution gas of upper level pressure-variable adsorption returns to next stage transformation
Absorption, mixes with the infiltration gas of this grade and extracts hydrogen again, the pressurized return first order of the resolution gas of afterbody pressure-variable adsorption
UF membrane process, forms closed cycle process, and pressure-variable adsorptions at different levels obtain product hydrogen.
2. technique according to claim 1, which is characterized in that the UF membrane process is divided into 2-3 grades of UF membrane processes, at different levels
Between connect.
3. technique according to claim 1, which is characterized in that in unstrpped gas carbon monoxide volumetric concentration be 15%~
80%, when hydrogen volume concentration is 80%~10%, the volumetric concentration of foreign gas is 0~1% range.
4. technique according to claim 1, which is characterized in that UF membrane working pressure range is 4MPaG~10MPaG, transformation
Absorption operating pressure is 0.3~3.0MPaG；The high pressure of UF membrane process sees through atmospheric pressure range: 0.3~3.0MPa；Low pressure ginseng
Ventilative pressure limit: < 0.3MPa.
5. double high technologies of a kind of UF membrane high purity carbon monoxide and hydrogen in conjunction with pressure-variable adsorption, which is characterized in that tool
Body the following steps are included:
(1) pass through a small amount of impurity component in pretreatment removing unstripped gas, including CH3OH、NH3,CNC,DME；
(2) pretreated unstripped gas enters pressure-variable adsorption process extraction hydrogen, and stripping gas is by sequentially entering multistage after pressurization
UF membrane process extracts carbon monoxide, and the high-pressure osmosis gas of UF membranes at different levels is back to pressure-variable adsorption process, forms closed cycle
Process, impermeable gas enter next stage UF membrane, and the impermeable gas of afterbody UF membrane rises for carbon monoxide product.
6. technique according to claim 5, which is characterized in that the UF membrane process is divided into 2-3 grades of UF membrane processes, at different levels
Between connect.
7. technique according to claim 5, which is characterized in that carbonomonoxide concentration is dense in 2%~15%, hydrogen in unstripped gas
Degree is 80%~98%.
8. technique according to claim 5, which is characterized in that pressure-variable adsorption operating pressure is 0.3~3.0MPaG, UF membrane
Working pressure range is 4MPaG~10MPaG；The high pressure of UF membrane process sees through atmospheric pressure range: 0.3~3.0MPa.
9. -8 technique according to claim 1, which is characterized in that the CO gas of afterbody UF membrane through decompression,
Purification process obtains the carbon monoxide product gas of high-purity.
Further, the purification treating method is to wait until high-purity CO using cryogenics or adsorption technology.
10. -8 technique according to claim 1, which is characterized in that the pretreatment is by temp.-changing adsorption or condensation technology
Etc. carrying out in removing unstripped gas containing the impurity harmful to film, the special adsorbent of pressure-variable adsorption.
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| CN115843289A (en) * | 2020-08-10 | 2023-03-24 | 普莱克斯技术有限公司 | Process for purifying synthesis gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114364448A (en) * | 2019-09-04 | 2022-04-15 | 环球油品有限责任公司 | Membrane permeate recirculation system for use with pressure swing adsorption equipment |
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| WO2022241593A1 (en) * | 2021-05-17 | 2022-11-24 | 广东赛瑞新能源有限公司 | Hydrogen recovery system using gas as raw material gas, recovery method therefor and use thereof |
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