CN1073875C - Pressure swing adsorption process for separating carbon monooxide from carbon monooxide contg. mixed gas - Google Patents
Pressure swing adsorption process for separating carbon monooxide from carbon monooxide contg. mixed gas Download PDFInfo
- Publication number
- CN1073875C CN1073875C CN97107737A CN97107737A CN1073875C CN 1073875 C CN1073875 C CN 1073875C CN 97107737 A CN97107737 A CN 97107737A CN 97107737 A CN97107737 A CN 97107737A CN 1073875 C CN1073875 C CN 1073875C
- Authority
- CN
- China
- Prior art keywords
- adsorption
- gas
- adsorption bed
- displacement
- pressure swing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Separation Of Gases By Adsorption (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The present invention relates to a pressure swing adsorption technology for the separation and the purification of gas in fixed gas, which aims to solve the problem of low CO purifying rate of the prior art. The present invention is characterized in that at least two adsorption beds for cycle running are adopted, each of the adsorption beds has the cycle running steps of adsorption, uniform pressure reduction, replacement, vacuum pumping and pressure increase, and the replacing steps of the adsorption beds are connected in series to form serial replacement. Adsorption agents are adopted to selectively adsorb and separate mixed gas to obtain purified carbon monoxide. The present invention has the advantages of simple process, low energy consumption, convenient operation and no environmental pollution. The CO recovery rate is as high as 80 to 86%, and the CO purity can reach more than 98 to 99%.
Description
The present invention relates to from gaseous mixture the pressure swing adsorption technique of separation and purified gases, the particularly pressure swing adsorption technique of separation purifying carbon oxide from the gas mixture that contains carbon monoxide.
Pressure swing adsorption process is a kind of technology of separating and purify purifying gas from gaseous mixture.Be a kind of gas that carries out at normal temperatures, solid phase physical adsorption process.Pressure swing adsorption has the feature of adsorption selectivity to different gas compositions according to sorbent material, big with loading capacity under high pressure (adsorptive pressure) to gas composition, and in the following little characteristics of loading capacity of low pressure (desorption pressures), alternately switch circulation technology by what absorption and desorb were formed, in order to the separation of realization gas composition.
Typically contain carbon mono oxide mixture, as the table composed as follows (percent by volume) of the water-gas in the converter gas of Metallurgical Factory, blast furnace gas, chemical plant, yellow phosphorus electric furnace gas etc.:
| Component/classification | Converter gas | Water-gas | Blast furnace gas |
| H 2 | 1.5 | 50 | 2.4 |
| CO | 51 | 40 | 25 |
| CO 2 | 22 | 7 | 14.5 |
| CH 4 | 48ppm | 3 | 0.3 |
| N 2 | 25 | 57.5 | |
| O 2 | 0.5 | 0.2 | 0.3 |
Existing pressure swing adsorption technique, in the adsorption bed of pressure swing adsorption system, the filling sorbent material, and in each adsorption bed, adopt absorption, the decompression of circular flow, step such as replace, vacuumize, boost, at the adsorption step CO gas in the fractionation by adsorption gas mixture optionally, be adsorbed agent absorption and stay in the adsorption bed; The N that is not adsorbed
2, O
2, H
2Wait other component, pass adsorption bed and discharge system, be adsorbed and stay CO gas in the adsorption bed, through reduce pressure, replaces, vacuumize, boost step, and acquisition CO product.Existing transformation adsorbing and extracting CO technology, not high to the purification degree of CO, the yield of CO is low.
Given this, the object of the invention be to provide a kind of can be from the various pressure swing adsorption techniques that are rich in and contain the carbon monoxide of producing high purity, high yield of purifying the gas mixture of carbon monoxide of lower concentration.
The present invention increases the series connection displacement step in existing transformation absorption purification CO technology.Components such as remaining in nitrogen in the adsorption bed, oxygen, hydrogen is replaced away as displacement gas with portioned product CO, to improve CO concentration in the bed, discharge the displacement gas of gas with the CO that still contains a great deal of in the replacement process again as another adsorption bed, the series connection displacement that formation is made of several adsorption beds, repeatedly utilize displacement gas, improve the utilization ratio of CO, reduce the displacement consumption of product, obtain the highly purified products C O and the higher CO rate of recovery, and realize its purpose.
The present invention further utilizes and contains copper adsorbent, under certain temperature, pressure carbon monoxide is carried out selective chemical absorption, obtains bigger loading capacity and higher separation efficiency, and realizes its purpose.
Of the present invention from contain carbon mono oxide mixture the pressure swing adsorption process (referring to accompanying drawing) of purifying carbon oxide, in pressure swing adsorption system, with the sorbent material gas in the fractionation by adsorption gas mixture optionally that is filled in the adsorption bed, obtain the adsorption bed (A, B, C, D) that carbon monoxide is characterized in that having at least two circular flows, the steps in sequence of each adsorption bed circular flow for absorption (A), all pressure drops (ED), displacement (RP), vacuumize (V), (ER) step of boosting, the series connection displacement that has the displacement step by at least two adsorption beds to be in series and to constitute.
Above-mentioned sorbent material is at least a in Cu (I) Y zeolite sorbent material, Cu (I) aluminium sorbent material, Cu (I) carbon adsorbent.
The pressure of above-mentioned adsorption step is that 0.05～1.0MPa, temperature are normal temperature～90 ℃.
Pressure swing adsorption system of the present invention, can be at least two by a plurality of, be filled with sorbent material, the adsorption bed and corresponding pipeline, the program variable valve that particularly contain copper adsorbent such as Cu (I) Y zeolite sorbent material, Cu (I) aluminium sorbent material, Cu (I) carbon adsorbent constitute.The quantity of adsorption bed is determined according to what of the composition of gas mixture and pressure, processing tolerance.The sorbent material of filling in the adsorption bed carries out selective chemical absorption to the CO in the gas mixture, and CO stays in the adsorption bed, other CO
2, H
2, N
2, O
2Make other purposes Deng being discharged from.After absorption finished, except that CO, residual had an a certain amount of H in the adsorption bed
2, N
2, O
2, CH
4Component returns the adsorption bed displacement of replacing and connect with portion C O product gas, again with H
2, N
2, O
2, CH
4Drive adsorption bed out of,, obtain the CO product of purifying finally with the CO product gas in the vacuum take-off recovery adsorption bed.
Pressure swing adsorption process of the present invention, processing step such as in the once circulation of each adsorption bed, will experience absorption, all pressure drops, replace, vacuumize, boost, no matter adopt several adsorption bed combinations, all alternately carry out these processing steps, so that the output of CO product continous-stable.Now each step is respectively described below.
Absorption (A): gas mixture enters from the adsorption bed import, the adsorption bed pressure-controlling is normal temperature～90 ℃ in 0.05～1.0MPa, temperature, the selected sorbent material that is adsorbed in of CO in the gas mixture particularly contains on the copper adsorbent, and other component is discharged from the adsorption bed outlet as absorption waste gas and made other purposes.This step has realized that CO is difficult for separating of absorbed component with other.
All pressure drops (ED): all voltage drop step is that this adsorption bed of finishing adsorption step is put pressure, reclaimed useful component and pressure in the adsorption bed to the adsorption bed of the equal voltage rise of needs, improves the process of the concentration in the adsorption bed.
Displacement (RP): return a part of CO product to adsorption bed, adsorption bed is carried out replacement operator from bottom to top, in same adsorption bed, displacement step can be finished several times, is called twice replaced (RP2), once displacement (RP1) ...Displacement vent gas from adsorption bed outlet discharge, deliver to next adsorption bed again, carry out displacement from bottom to top, this displacement vent gas is replaced next adsorption bed more again ... several adsorption bed series connection are communicated with, different adsorption beds is replaced one by one, in many bed process, form the series connection displacement like this.Series connection metathetical purpose is to reduce foreign matter content in the bed, reclaims the CO in the displacement waste gas, obtains highly purified CO product.The displacement waste gas that displacement is at last discharged partly or entirely returns the yield of raw material gas inlet with raising CO, or discharges and make other usefulness.
Vacuumize (V): the power by pump is extracted the CO product of purifying out, carries the product gas system that goes.A part is used for displacement step.After this step was finished, the agent of adsorption bed internal adsorption was also regenerated and is finished, and prepared to carry out cyclical operation next time.Vacuumizing step can finish several times, is called once to vacuumize (V1), secondary vacuum pumping (V2) ...
(R) boosts: finish vacuumize step after, utilize absorption waste gas, displacement waste gas or unstripped gas that this bed is boosted.
Pressure swing adsorption process of the present invention has following tangible advantage and significant effect.
One, increase the series connection displacement step, after particularly use contains copper adsorbent, can improve the purification degree of CO, its CO purity can reach 98～99%.
Two, increase series connection displacement step and use and contain copper adsorbent, can improve purification degree and the purification efficiency of CO, the CO that can from the gas mixture that contains lower concentration CO, purify, and can be from impurity gas such as the CH of adsorptivity near CO
4Contain the CO that purifies in the CO gas mixture.Therefore, the CO that can from multiple industrial gaseous waste, purify, it is applied widely.
Three, the absorption waste gas that the present invention discharged can be used as the purge gas of other gas mixture drying process.Adopt the series connection displacement in addition, repeatedly utilize displacement waste gas and partly or entirely replace waste gas and return pretreatment process from raw material gas inlet, recycling can make the rate of recovery of CO product can be up to 80～86%, and the purity of CO product can be up to more than 99%.
Below, use embodiment and accompanying drawing thereof again, the invention will be further described.
Brief description of drawings.
Fig. 1 be of the present invention a kind of from contain carbon mono oxide mixture the schema of the pressure swing adsorption process of purifying carbon oxide.
Fig. 2 is the pressure trend figure of the loop cycle of adsorption bed A of Fig. 1.
Embodiment 1
Of the present invention a kind of from contain carbon mono oxide mixture the pressure swing adsorption process of purifying carbon oxide, as shown in drawings.
Unstripped gas is a semi-water gas:
Form: CO CO
2N
2H
2CH
4+ ArO
2
Volume %:26.5 9.0 19.0 44.0 1.0 0.5
This pressure swing adsorption process is according to the composition employing pressure swing adsorption system as shown in Figure 1 of above-mentioned raw materials.
Pressure swing adsorption system of the present invention, the adsorption bed A that four tower structures are arranged, B, C, D, compressor 2 and unstripped gas house steward 4 with unstripped gas inlet pipe 1 UNICOM, absorption waste gas header 7, the displacement waste gas header 10 that is communicated with unstripped gas inlet pipe 1, displacement gas house steward 17 and compressor 15 wherein, CO product gas house steward 19 and vacuum pump 21 wherein, compressor 15 is communicated with house steward user 33, adapter 5 between above-mentioned each house steward and each adsorption bed, the sequencing valve 27A that matches with adsorption bed A in each phase adapter, 28A, 29A, 30A, 31A, 32A, the sequencing valve 27B that matches with adsorption bed B, 28B, 29B, 30B, 31B, 32B, the sequencing valve 27C that matches with adsorption bed C, 28C, 29C, 30C, 31C, 32C, the sequencing valve 27D that matches with adsorption bed D, 28D, 29D, 30D, 31D, 32D.The sorbent material of filling is to contain copper adsorbent in this operation adsorption tower.
During the native system operation, press each program valve of programming Control by computer, be rich in the CO unstripped gas from unstripped gas house steward 1 as gas mixture, after compressor 2 pressurizations, through unstripped gas house steward 4, by listed sequential in the present embodiment PSA technology time-scale described later, again through taking over 5 sequencing valve 27A, 27B, 27C, the 27D that reach wherein, import from the adsorption bed bottom enters adsorption bed A, B, C, D respectively, Cu (I) Y zeolite sorbent material is housed in each adsorption bed, at this CO in gas mixture is carried out selective chemical absorption, other CO
2, CH
4, H
2, N
2, O
2Discharge from the outlet at adsorption bed top Deng gas,, discharge native system through its vent pipe again and make other purposes respectively through sequencing valve 32A, 32B, 32C, 32D.When adsorption bed A, B, C, D respectively after adsorption step is saturated to CO absorption, with the portioned product in the CO product through displacement gas house steward 17, by compressor 15 pressurizations, again respectively through taking over 5 sequencing valve 29A, 29B, 29C, the 29D that reach wherein, send into adsorption bed A, B, C, the D displacement of replacing and connect, foreign gas remaining in the tower is displaced adsorption bed, to obtain more highly purified CO product.Through control valve 28A, 28B, 28C, 28D, CO product gas house steward 19 enters vacuum pump 21 then, and suction obtains the CO product, exports native systems for using through house steward user 33 again.Because the CO of high level is arranged in the displacement waste gas that displacement is discharged, therefore the present invention will partly or all replace waste gas through sequencing valve 30A, 30B, 30C, 30D again, displacement waste gas header 1D returns the inlet of sending into compressor 2 and recycling, to improve the yield of CO product.
Below, serve as that the master is illustrated technological process of the present invention with adsorption tower A.
(1) absorption A
When reaching adsorption operations pressure 0.05～1.0MPa, through sequencing valve 27A, 32A, to the continuous charging feed gas of adsorption bed A, CO is attracted on the sorbent material in adsorption bed from the adsorption bed bottom inlet, discharge absorption waste gas from adsorption bed A top exit simultaneously, and send system.When the CO components and concentration is about to reach the CO content of setting in this discharging gas, close sequencing valve 27A, 32A, adsorption step is finished.
(2) equal pressure drop ED
After adsorption step, close sequencing valve 27A, 32A, open the program control 31A of valve, the air venting in the adsorption bed A is sent into adsorption bed B, for the adsorption bed B usefulness of boosting.
(3) twice replaced RP2
After equal voltage drop step, close sequencing valve 31A, open sequencing valve 31D, the gas after the adsorption bed D displacement is introduced adsorption bed A make displacement gas usefulness, through sequencing valve 30A, displacement waste gas header 10, return unstripped gas inlet pipe 1 again.
(4) once replace RP1
(5) V1, the secondary V2 that finds time that once finds time
(6) ER that boosts
(1)～(six) step circulates repeatedly in adsorption bed A and carries out, and other three towers carry out with same steps as, and its arrangement sequential is seen below and stated table.
The purity of the obtainable CO product of this embodiment is 97～99%, impurity H in the product
2Be 0.35%, N
2Be 0.35%, CH
4For＜200ppm, CO
20.1～2 is %, product recovery rate is＞80%.
Table present embodiment PSA technology time-scale
| Program element | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Pressure MPa | 0.3 | 0.1 | 0.02 | 0.02 | -0.03 | -0.075 | 0.1 | |||||
| The A tower | A | ED | RP2 | RP1 | V1 | V2 | ER | |||||
| The B tower | V1 | V2 | ER | A | ED | RP2 | RP1 | |||||
| The C tower | RP1 | V1 | V2 | ER | A | ED | RP2 | |||||
| The D tower | RP2 | RP1 | V1 | V2 | ER | A | ED | |||||
Claims (3)
1, the pressure swing adsorption process of purifying carbon oxide from contain carbon mono oxide mixture, in pressure swing adsorption system, with the sorbent material gas in the fractionation by adsorption gas mixture optionally that is filled in the adsorption bed, obtain carbon monoxide, it is characterized in that having the adsorption bed (A, B, C, D) of at least two circular flows, the steps in sequence of each adsorption bed circular flow for absorption (A), all pressure drops (ED), displacement (RP), vacuumize (V), (ER) step of boosting, the series connection displacement that has the displacement step by at least two adsorption beds to be in series and to constitute.
2, according to claim 1 from contain carbon mono oxide mixture the pressure swing adsorption process of purifying carbon oxide, it is characterized in that said sorbent material is at least a in Cu (I) Y zeolite sorbent material, Cu (I) aluminium sorbent material, Cu (I) carbon adsorbent.
3, according to claim 1 and 2 from contain carbon mono oxide mixture the pressure swing adsorption process of purifying carbon oxide, the pressure that it is characterized in that said adsorption step is that 0.05～1.0MPa, temperature are normal temperature～90 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107737A CN1073875C (en) | 1997-10-24 | 1997-10-24 | Pressure swing adsorption process for separating carbon monooxide from carbon monooxide contg. mixed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107737A CN1073875C (en) | 1997-10-24 | 1997-10-24 | Pressure swing adsorption process for separating carbon monooxide from carbon monooxide contg. mixed gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1215626A CN1215626A (en) | 1999-05-05 |
| CN1073875C true CN1073875C (en) | 2001-10-31 |
Family
ID=5169828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97107737A Expired - Lifetime CN1073875C (en) | 1997-10-24 | 1997-10-24 | Pressure swing adsorption process for separating carbon monooxide from carbon monooxide contg. mixed gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1073875C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1891328B (en) * | 2006-05-10 | 2011-06-08 | 杨皓 | Low concentration adsorbable constituent variable-pressure adsorption and separation method |
| CN101302009B (en) * | 2008-06-23 | 2010-06-02 | 四川天一科技股份有限公司 | Method for transporting, purifying and purifying carbon monoxide of silicon carbide smelting furnace gas |
| CN101549241B (en) * | 2009-05-01 | 2011-09-07 | 宇星科技发展(深圳)有限公司 | Pressure swing adsorption recovery unit of organic exhaust gas |
| CN114452771A (en) * | 2022-01-16 | 2022-05-10 | 四川天人化学工程有限公司 | Improved process for purifying low-hydrogen high-concentration carbon monoxide |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106219A (en) * | 1985-09-17 | 1987-03-18 | 关西热化学株式会社 | The sorbent material of Separation and Recovery carbon monoxide and method for making thereof, and with the method for its Separation and Recovery high-purity CO |
| JPH01151920A (en) * | 1987-12-07 | 1989-06-14 | Kobe Steel Ltd | Pressure-swing absorption method |
| JPH05111610A (en) * | 1991-10-23 | 1993-05-07 | Mitsui Eng & Shipbuild Co Ltd | Separation of gaseous co not containing ch4 |
| JPH0768119A (en) * | 1993-09-03 | 1995-03-14 | Iwatani Gas Kk | Method for separation and recovery of carbon monoxide |
-
1997
- 1997-10-24 CN CN97107737A patent/CN1073875C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106219A (en) * | 1985-09-17 | 1987-03-18 | 关西热化学株式会社 | The sorbent material of Separation and Recovery carbon monoxide and method for making thereof, and with the method for its Separation and Recovery high-purity CO |
| JPH01151920A (en) * | 1987-12-07 | 1989-06-14 | Kobe Steel Ltd | Pressure-swing absorption method |
| JPH05111610A (en) * | 1991-10-23 | 1993-05-07 | Mitsui Eng & Shipbuild Co Ltd | Separation of gaseous co not containing ch4 |
| JPH0768119A (en) * | 1993-09-03 | 1995-03-14 | Iwatani Gas Kk | Method for separation and recovery of carbon monoxide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1215626A (en) | 1999-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1195570C (en) | Optimal pressure swing adsorption refluxing | |
| CN1080136C (en) | Improved pressure swing absorption process | |
| CN1229167C (en) | Vacuum rotary adsorptive process utilizing controlled waste gas extraction | |
| CN1040068C (en) | Duplex adsorption process | |
| CN1165363C (en) | Improved vacuum pressure swing absorption process | |
| CN101108295B (en) | Pressure swing adsorption with displacement and recovery steps for removing CO from shift gas2Method (2) | |
| CN1196273A (en) | Method for production of nitrogen using oxygen selective adsorbents | |
| CN1035993A (en) | Reclaim the method for oxygen rich gas | |
| CN1135370A (en) | Pressure-changing absorption method for gas in circulating space | |
| CN1223164A (en) | PSA process and system using simultaneous top and bottom evacuation of adsorbent bed | |
| CN1170624A (en) | Process for treating gas mixture by pressure swing adsorption | |
| CN87107532A (en) | A kind of transformation of utilizing is adsorbed improved gas separating method | |
| CN85103557A (en) | Methane in the pressure swing adsorption method enrichment coal mine mash gas | |
| CN1599636A (en) | Pressure swing adsorption process for co-production of nitrogen and oxygen | |
| CN1215624A (en) | Multi-bed Vacuum Pressure Swing Adsorption Method for Extracting Hydrogen from Mixed Gases Containing Hydrogen | |
| CN1203035C (en) | Method for subtracting hydrocarbor impurities of above C3+ from mixed acetylene gas and recovering acetylene | |
| CN1073875C (en) | Pressure swing adsorption process for separating carbon monooxide from carbon monooxide contg. mixed gas | |
| CN1126585C (en) | Variable-pressure adsorption separating method for simultaneously purifying easy-to-adsorb phase and difficult-to-adsorb phase | |
| CN1215627A (en) | Pressure swing adsorption method for purifying carbon monoxide from mixed gas containing carbon monoxide | |
| CN1134970A (en) | Recovery of hydrocarbons from gas streams | |
| CN1063095C (en) | Six-tower vacuum adsorption gas separating technology | |
| CN1074448C (en) | Pressure swing adsorption process for concentration and purification of carbon monooxide in blast furnace gas | |
| CN1100588C (en) | Pressure swing adsorption process for extracting carbon monooxide as fuel from blast furnace waste gas | |
| CN1069687C (en) | Process for purification to obtain high-purity synthetic gas by adsorption | |
| CN1075394C (en) | Variable-pressure adsorption process for removing CO2 from transformation gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20011031 |
|
| CX01 | Expiry of patent term |