WO2005120682A1 - Procede de production d'oxygene utilisant des installation d'adsorption par variation de pression en trois etapes - Google Patents

Procede de production d'oxygene utilisant des installation d'adsorption par variation de pression en trois etapes Download PDF

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Publication number
WO2005120682A1
WO2005120682A1 PCT/CN2005/000642 CN2005000642W WO2005120682A1 WO 2005120682 A1 WO2005120682 A1 WO 2005120682A1 CN 2005000642 W CN2005000642 W CN 2005000642W WO 2005120682 A1 WO2005120682 A1 WO 2005120682A1
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Prior art keywords
pressure
stage
adsorption
pressure swing
swing adsorption
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PCT/CN2005/000642
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English (en)
French (fr)
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Yuwen Song
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Chengdu Tianli Chemical Engineering Technology Co., Ltd.
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Application filed by Chengdu Tianli Chemical Engineering Technology Co., Ltd. filed Critical Chengdu Tianli Chemical Engineering Technology Co., Ltd.
Priority to EA200700014A priority Critical patent/EA011196B1/ru
Priority to JP2007526171A priority patent/JP5184885B2/ja
Priority to ES05754846T priority patent/ES2411663T3/es
Priority to US11/629,144 priority patent/US7645325B2/en
Priority to AU2005251849A priority patent/AU2005251849B2/en
Priority to EP05754846A priority patent/EP1772183B1/en
Publication of WO2005120682A1 publication Critical patent/WO2005120682A1/zh

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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/04Purification or separation of nitrogen
    • C01B21/0405Purification or separation processes
    • C01B21/0433Physical processing only
    • C01B21/045Physical processing only by adsorption in solids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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
    • B01D53/04Separation 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
    • B01D53/047Pressure swing adsorption
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    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/02Preparation of oxygen
    • C01B13/0229Purification or separation processes
    • C01B13/0248Physical processing only
    • C01B13/0259Physical processing only by adsorption on solids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10Inorganic adsorbents
    • B01D2253/102Carbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D2253/104Alumina
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D2253/106Silica or silicates
    • B01D2253/108Zeolites
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D2253/116Molecular sieves other than zeolites
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2256/00Main component in the product gas stream after treatment
    • B01D2256/10Nitrogen
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2256/00Main component in the product gas stream after treatment
    • B01D2256/12Oxygen
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/10Single element gases other than halogens
    • B01D2257/102Nitrogen
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
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    • B01D2257/10Single element gases other than halogens
    • B01D2257/11Noble gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D2257/50Carbon oxides
    • B01D2257/504Carbon dioxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D2259/40001Methods relating to additional, e.g. intermediate, treatment of process gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
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    • B01D2259/40011Methods relating to the process cycle in pressure or temperature swing adsorption
    • B01D2259/40013Pressurization
    • B01D2259/40015Pressurization with two sub-steps
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    • B01D2259/40013Pressurization
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    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B01D2259/40013Pressurization
    • B01D2259/40018Pressurization with more than three sub-steps
    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B01D2259/4002Production
    • B01D2259/40022Production with two sub-steps
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    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B01D2259/40011Methods relating to the process cycle in pressure or temperature swing adsorption
    • B01D2259/40058Number of sequence steps, including sub-steps, per cycle
    • B01D2259/40066Six
    • BPERFORMING OPERATIONS; TRANSPORTING
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    • BPERFORMING OPERATIONS; TRANSPORTING
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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
    • B01D53/04Separation 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
    • B01D53/047Pressure swing adsorption
    • B01D53/053Pressure swing adsorption with storage or buffer vessel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/26Drying gases or vapours
    • B01D53/261Drying gases or vapours by adsorption
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00Purification or separation of specific gases
    • C01B2210/0043Impurity removed
    • C01B2210/0045Oxygen
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02CCAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00Capture or disposal of greenhouse gases
    • Y02C20/40Capture or disposal of greenhouse gases of CO2
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/151Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Definitions

  • the invention relates to a method for producing oxygen using a three-stage pressure swing adsorption device. Background technique
  • the purpose of the present invention is to provide a method for producing oxygen in a three-stage pressure swing adsorption device.
  • the method overcomes the above-mentioned problems of the prior art, improves the oxygen recovery rate of the entire device, and greatly saves power consumption and compared with the prior art. investment.
  • the invention uses a three-stage pressure swing adsorption device to separate nitrogen and oxygen from the air.
  • the product can be pure oxygen, pure nitrogen, or both pure oxygen and pure nitrogen.
  • This method uses a three-stage pressure swing adsorption device to operate in series.
  • the first stage PSA device is used to remove carbon dioxide, water and some nitrogen and to condense the nitrogen
  • the second stage PSA device is used to remove the intermediate gas flowing out of the adsorption step of the first stage PSA device.
  • the nitrogen is further removed, and the oxygen is increased to the required concentration.
  • the third-stage pressure swing adsorption device is used to further remove the nitrogen and argon from the oxygen-enriched mixed gas flowing out from the adsorption step of the second-stage pressure swing adsorption device.
  • the adsorption tower of the first stage pressure swing adsorption device sequentially undergoes adsorption A, replacement P ', and vacuum VC in a cycle; second stage gas reverse equal pressure boost 2ER, Replacement gas pressure increase R ', final pressure increase FR pressure swing adsorption process steps; the adsorption tower of the second pressure swing adsorption device sequentially undergoes adsorption, reverse pressure equalization pressure drop BD', The final step-up FR pressure swing adsorption process step, the adsorption tower of the third stage pressure swing adsorption device sequentially undergoes adsorption, product oxygen replacement P ', product oxygen pressure drop D, and replacement gas pressure boost R' pressure swing adsorption in a cycle. Process steps.
  • the forward pressure equalization and pressure reduction ED process steps are added after the adsorption A process step, and the reverse pressure equalization and pressure reduction BD 'process step is added to the reverse boost ER process steps to increase the pressure.
  • the mixed gas in the ER process step comes from the depressurized ED process step and / or in the third stage of the pressure swing adsorption device, the adsorption tower is added with the forward equalized and reduced pressure ED process step after the adsorption A process step, while the replacement gas is boosted by R 'After the process steps are completed, the reverse boost ER process step is added, and the boost ER process step The sudden mixture comes from the step-down ED process.
  • the first stage of the PSA adsorption tower increases the pressure equalization and pressure reduction 2ED 'process steps at both ends after the adsorption A process step, and increases the pressure equalization and pressure booster 2ER at both ends after the two-stage gas reverse pressure equalization pressure boost 2ER process step is completed.
  • 'Process step pressure-boosting 2ER at both ends' process step
  • the mixed gas from the process step comes from the pressure-boosting 2ED process step.
  • the third stage pressure swing adsorption device adsorption tower adds a vacuum VC process step after the product oxygen depressurization D process step.
  • a reverse depressurization BD process step is added after the P 'process step is replaced.
  • the mixed gas released from the second stage pressure swing adsorption device adsorption tower reverse pressure equalization pressure reduction BD 'process step enters the buffer tank V until the pressure is balanced, while the first stage pressure swing adsorption device adsorption tower is performing the second stage gas reverse pressure equalization During the step-up 2ER process, the adsorption tower is in communication with the buffer tank V until the pressure is balanced.
  • the average concentration of oxygen in the outlet gas of the adsorption step of the adsorption tower of the first stage pressure swing adsorption device is 21 ⁇ 80 V%.
  • the average concentration of oxygen in the outlet gas of the adsorption step of the adsorption tower of the first stage pressure swing adsorption device is 21 ⁇ 25V%.
  • the pressure of the three-stage pressure swing adsorption device adsorption step A is 0. 001 ⁇ 0. 6 Pa gauge or the pressure of the first and second stage pressure swing adsorption device adsorption step A is 0. 001 ⁇ 0. 05MPa gauge pressure, 6MPa ⁇ ⁇
  • the third stage pressure swing adsorption device adsorption step A pressure is 0. 1 ⁇ 0. 6MPa gauge pressure.
  • the adsorbent filled from bottom to top in the pressure swing adsorption device of the first stage is activated alumina and molecular sieve; the adsorbent filled in the pressure swing adsorption device of the second stage is only molecular sieve; the pressure swing adsorption device of the third stage
  • the adsorbent packed in the adsorption tower is an oxygen adsorption equilibrium adsorbent or a kinetically selective adsorbent.
  • the number of reverse pressure equalization and pressure reduction ED 'of the adsorption tower of the second stage pressure swing adsorption device and the pressure equalization and pressure increase 2ER of the second stage gas of the pressure absorption tower of the first stage pressure swing adsorption device are greater than or equal to one.
  • the reverse pressure equalization pressure reduction ED 'of the adsorption tower of the second stage pressure swing adsorption device and the reverse pressure equalization pressure increase 2ER of the second stage gas pressure of the adsorption tower of the first pressure swing adsorption device are 3 to 7 times.
  • the invention uses a three-stage pressure swing adsorption device to separate nitrogen and oxygen from the air.
  • the product can be pure oxygen, pure nitrogen, or both pure oxygen and pure nitrogen.
  • This method uses a three-stage pressure swing adsorption device to operate in series.
  • the first stage PSA device is used to remove carbon dioxide, water and some nitrogen and to condense the nitrogen, and the second stage PSA device is used to adsorb the first stage PSA adsorption tower adsorption step.
  • the nitrogen in the reactor is further removed, and the oxygen is increased to the required concentration.
  • the adsorption tower of the first stage pressure swing adsorption device undergoes adsorption A, pressure drop 2ED 'at both ends, replacement P', Reverse depressurization BD, two-stage gas reverse equal pressure boost 2ER, two ends equal pressure boost 2ER ', replacement gas Step-up R ', final step-up FR PSA process steps; the second stage PSA adsorption tower undergoes adsorption A, forward equalizing pressure drop ED, and reverse equalizing pressure drop BD' in a cycle.
  • the adsorption tower of the third stage pressure swing adsorption device sequentially undergoes adsorption A, product oxygen replacement P ', product oxygen pressure D, Replacement gas step-up R 'pressure swing adsorption process steps.
  • Three-stage pressure swing adsorption device adsorption step A pressure is 0. 2 ⁇ 0. 6MPa gauge pressure.
  • the invention uses a three-stage pressure swing adsorption device to separate nitrogen and oxygen from the air.
  • the product can be pure oxygen, pure nitrogen, or both pure oxygen and pure nitrogen.
  • This method uses a three-stage pressure swing adsorption device to operate in series.
  • the first stage PSA device is used to remove carbon dioxide, water and some nitrogen and to condense the nitrogen
  • the second stage PSA device is used to remove the intermediate gas flowing out of the adsorption step of the first stage PSA device.
  • the nitrogen is further removed, and the oxygen is increased to the required concentration.
  • the adsorption tower of the first stage pressure swing adsorption device undergoes adsorption A, pressure drop 2ED 'at both ends, vacuum VC, two Reverse pressure equalization pressure boost 2ER, pressure equalization pressure boost 2ER 'at both ends, and final pressure boost FR pressure swing adsorption process steps; the adsorption tower of the second pressure swing adsorption device sequentially undergoes adsorption in a cycle 4, reverse pressure equalization Pressure drop BD ', final step-up FR PSA process steps, the adsorption tower of the third stage PSA device undergoes adsorption A, product oxygen replacement P', product in a cycle Buck gas D, the displacement gas boost R 'pressure swing adsorption process steps.
  • the invention uses a three-stage pressure swing adsorption device to separate nitrogen and oxygen from the air.
  • the product can be pure oxygen, pure nitrogen, or both pure oxygen and pure nitrogen.
  • This method uses a three-stage pressure swing adsorption device to operate in series.
  • the first stage PSA device is used to remove carbon dioxide, water and some nitrogen and to condense the nitrogen
  • the second stage PSA device is used to remove the intermediate gas flowing out of the adsorption step of the first stage PSA device.
  • the nitrogen is further removed, and the oxygen is increased to the required concentration.
  • the third-stage pressure swing adsorption device is used to further remove the nitrogen and argon from the oxygen-enriched mixed gas flowing out from the adsorption step of the second-stage pressure swing adsorption device.
  • the adsorption tower of the first stage pressure swing adsorption device sequentially undergoes adsorption A, displacement P ', vacuum VC :, two-stage gas reverse equal pressure boost 2ER, Replacement gas step-up R ', final step-up FR PSA process steps; the adsorption tower of the second stage PSA device undergoes adsorption, reverse equalizing pressure drop BD', Step-up FR pressure swing adsorption process steps.
  • the adsorption tower of the third stage pressure swing adsorption device sequentially undergoes adsorption in a cycle. 4. Forward pressure equalization pressure drop ED, product oxygen pressure drop D, reverse pressure equalization pressure boost ER. Pressure adsorption process steps.
  • the third stage pressure swing adsorption device adsorption tower adds a vacuum VC process step after the product oxygen depressurization D process step.
  • the present invention uses a three-stage pressure swing adsorption device to separate nitrogen and oxygen from the air.
  • the product can be pure oxygen, pure nitrogen, or both pure oxygen and pure nitrogen.
  • This method uses a three-stage pressure swing adsorption device. Operation, the first stage PSA device is used to remove carbon dioxide, water and some nitrogen and Nitrogen is concentrated. The second-stage PSA device is used to further remove nitrogen from the intermediate gas flowing out of the adsorption step of the adsorption tower of the first-stage PSA device and increase the oxygen to the required concentration.
  • the pressure adsorption device is used to further remove nitrogen and argon from the oxygen-enriched gas mixture flowing out of the adsorption step of the adsorption tower of the second stage pressure swing adsorption device, and increase the oxygen to more than 95V%.
  • the tower undergoes adsorption A, displacement P ', vacuuming VC in sequence; two-stage gas reverse equalizing pressure boost 2ER, replacement gas pressure R', and final pressure FR pressure swing adsorption process steps; the second The adsorption tower of the stage pressure swing adsorption device sequentially undergoes adsorption eight, reverse pressure equalization and pressure reduction BD ', and finally the step-up FR pressure swing adsorption process steps in one cycle.
  • the third stage pressure swing adsorption device has an adsorption tower in one cycle.
  • FIG. 1 is an operation program table of the process steps of the first stage pressure swing adsorption device of the embodiment.
  • Fig. 2 is a process sequence chart of the process steps of the second stage pressure swing adsorption device of the embodiment.
  • Fig. 3 is a process sequence chart of the process steps of the third stage pressure swing adsorption device of the embodiment.
  • Fig. 4 is a process flowchart of the first embodiment. Best way to implement the invention
  • the raw material gas of the present invention is air, and its typical composition is as follows:
  • the present invention uses three-stage pressure swing adsorption technology to produce oxygen-rich air from the air.
  • This method uses a three-stage pressure swing adsorption device to operate in series.
  • the first stage pressure swing adsorption device is used to remove gaseous water, carbon dioxide and some nitrogen, and the adsorption tower absorbs
  • the average concentration of oxygen in the outlet gas of the step is 21 ⁇ 80 ° /. (V)
  • the adsorbent filled from bottom to top in the adsorption tower is activated alumina and molecular sieve
  • the second stage pressure swing adsorption device is used for nitrogen in the intermediate gas flowing out of the adsorption tower adsorption step of the first stage pressure swing adsorption device It is further removed, and the oxygen is increased to the required concentration.
  • the adsorbent filled in the adsorption tower is molecular sieve.
  • the third stage pressure swing adsorption device is used to mix the gas flowing out of the adsorption tower adsorption step of the second pressure swing adsorption device.
  • the nitrogen and argon are further removed, and the oxygen is increased to more than 99.5% (V).
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • Three-stage pressure swing adsorption device adsorption step A pressure is 0. 001 ⁇ 0. 6MPa (gauge pressure).
  • Each adsorption tower of the three-stage pressure swing adsorption device sequentially goes through the following steps in a cycle.
  • the first stage pressure swing adsorption device The first stage pressure swing adsorption device:
  • Air is sent to the inlet of the adsorption tower in the adsorption step, and the adsorbent in the adsorption tower is selectively Components such as water, carbon dioxide, and some nitrogen in the air are sequentially adsorbed, and components such as non-adsorbed nitrogen and argon which are not easily adsorbed flow out from the outlet end and enter the adsorption tower of the second stage pressure swing adsorption device in the adsorption step.
  • the total amount of components such as water, carbon dioxide, and some nitrogen adsorbed by the adsorbent is constantly increasing.
  • the adsorbent saturates the above components, the intake of air is stopped, and the adsorption ends at this time.
  • the oxygen concentration in the dead space gas in the adsorption tower is high, and this part of oxygen needs to be recycled.
  • the gas in the adsorption tower is depressurized from the upper and lower ends.
  • the dead space gas is discharged from the inlet and outlet of the adsorption tower and enters the corresponding adsorption tower that has completed the two-stage gas reverse equalizing pressure boosting 2ER step to perform the two-stage pressure boosting 2ER '.
  • the number of pressure drops 2ED 'at both ends can be 1 or more times (such as 1 ⁇ 3 times).
  • the gas in the first step of evacuating the VC step is used to enter from the bottom of the adsorption tower to replace the remaining oxygen in the tower.
  • the corresponding adsorption tower of the two-stage gas reverse equalizing pressure boosting 2ER step or the two-end equalizing pressure boosting 2ER 'step performs the replacement gas boosting R'.
  • this part of the gas is evacuated in the reverse direction from the bottom of the adsorption tower or used as a product.
  • the water, carbon dioxide and nitrogen adsorbed by the adsorbent were evacuated from the bottom of the adsorption tower with a vacuum pump, and the adsorbent was regenerated.
  • the second stage of the pressure swing adsorption device is used to complete the adsorption of the adsorption tower or the pressure is equalized to reduce the pressure.
  • the gas enters the adsorption tower that has completed the evacuation VC step in this stage to increase the pressure of the adsorption tower.
  • the two-stage gas reverse pressure equalization pressure boost 2ER can be 1 or more times (such as 1 ⁇ 7 times).
  • the gas discharged from the pressure equalizing and pressure reducing 2ED 'steps at both ends of the section is used to enter the adsorption tower from the inlet and outlet ends, so that the adsorption tower gradually increases the pressure, and the pressure is increased at both ends.
  • 2ER ' is equal to the number of pressure drops 2ED' at both ends.
  • the step of equalizing pressure boosting 2ER 'at both ends of the adsorption tower in this section is different from the ordinary pressure equalizing pressure increasing ER step.
  • the gas in the ordinary pressure equalizing pressure increasing ER step of the adsorption tower enters from the exit end of the adsorption tower, and
  • the pressure of the pressure-boosting 2ER 'step at both ends of the tower enters from both ends of the inlet and outlet of the adsorption tower.
  • the outlet gas of the adsorption tower in the first stage of the PSA device in the adsorption step is sent to the adsorption tower in the second stage of the PSA device in the adsorption step.
  • the adsorbent in the adsorption tower selectively adsorbs nitrogen, which is difficult to adsorb oxygen and argon. Gas and other components are discharged from the outlet into the oxygen-rich buffer tank or the next section. As time elapses, the total amount of nitrogen adsorbed by the adsorbent increases. When the adsorbed nitrogen is saturated, the intake is stopped and the adsorption is completed at this time.
  • the oxygen concentration in the outlet gas is controlled at the level required by the product.
  • the dead space gas in the adsorption tower is exhausted from the exit of the adsorption tower and enters the corresponding adsorption tower in the step of BD 'step of reverse pressure equalization and pressure reduction.
  • the pressures of the two towers may be equal or unequal. 5 Product oxygen concentration meets the requirements.
  • the number of forward equalizing pressure reduction ED can be 1 time or more (such as 1 ⁇ 3 times).
  • Adsorption or forward pressure equalization and decompression After the ED is completed, the gas in the tower is reversed from the bottom of the adsorption tower to the first stage of the VC which has been evacuated.
  • the second stage gas reverse equalization pressure boost 2ER is directly performed.
  • the number of reverse BD pressure equalization and pressure reduction can be 1 or more times (such as 1 ⁇ 7 times). .
  • the two-stage gas pressure equalization 2ER can be reversed, and the gas in the adsorption tower can also be reversed into a buffer first. Tank, and then the gas in the buffer tank is sent to the first stage pressure swing adsorption device to evacuate the adsorption tower after the completion of the VC, the two-stage gas reverse equalization pressure boost 2ER, the number of buffer tanks and the reverse equal pressure drop 5 pressure BD 'Equal times.
  • the gas discharged from the forward pressure equalization and pressure reduction ED step is used to enter the adsorption tower from the outlet end to increase the pressure of the adsorption tower.
  • the third stage pressure swing adsorption device is a third stage pressure swing adsorption device.
  • the oxygen-enriched mixed gas is sent to the inlet of the adsorption tower in the adsorption step.
  • the adsorbent in the adsorption column is selected to sequentially adsorb the oxygen and other components in the oxygen-enriched mixed gas, and the non-adsorbed nitrogen or argon. Separate from The outlet end is vented or used for other purposes. As time passes, the total amount of oxygen and other components adsorbed by the adsorbent increases continuously. When the adsorbent adsorbs the above-mentioned oxygen saturation, the air intake is stopped, and the adsorption ends at this time.
  • the dead space gas in the adsorption tower is discharged from the exit of the adsorption tower and enters the corresponding adsorption tower which has completed the replacement gas boosting step R '.
  • the pressure of the two towers may be equal or unequal to ensure the oxygen concentration of the product. fulfil requirements.
  • the number of forward equalizing pressure reduction ED can be 1 time or more (such as 1 ⁇ 3 times).
  • the product oxygen in the adsorption tower that has completed the replacement step P 'in this section is pressurized from the bottom of the adsorption tower to replace the residual nitrogen and argon in the tower, and replaced from the adsorption tower
  • the mixed gas enters the corresponding adsorption tower that has completed the step D of decompression or the step of vacuum VC to perform the replacement gas boost R ′.
  • this part of the gas is released from the adsorption tower, part of which is used as a product, and part of the gas is pressurized to replace the adsorbent in the adsorption tower.
  • the pure oxygen adsorbed by the adsorbent is extracted from the bottom of the adsorption tower with a vacuum pump to the next stage, and the adsorbent is regenerated at the same time.
  • the gas discharged from the forward pressure equalization and pressure reduction ED step is used to enter the adsorption tower from the outlet to increase the pressure of the adsorption tower.
  • Embodiment 1 of the present invention is a diagrammatic representation of Embodiment 1 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the U gas from the adsorption tower of the first stage pressure swing adsorption device in the adsorption step is controlled to be 21 ⁇ 23% (V)
  • the oxygen concentration in the exit gas of the adsorption tower of the second stage pressure swing adsorption device in the adsorption step is controlled to 93 % (V) (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower in the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • a total of 4 adsorption towers 1A to 1D constitute a first stage pressure swing adsorption device.
  • the adsorbent filled from the bottom to the top of the adsorption tower is activated alumina and molecular sieve in turn.
  • a single-phase adsorption pressure equalization program is run.
  • the vacuum pump P1 is used to evacuate the adsorption tower by using the vacuum line G15.
  • the second stage pressure swing adsorption device The adsorbent filled in the adsorption tower is a molecular sieve, and a single column adsorption pressure equalization program is run.
  • a total of 4 adsorption towers 3A to 3D constitute a third stage pressure swing adsorption device.
  • the adsorbent filled in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent, and a single-column adsorption replacement pressure reduction process is run.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air, and the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower of the second pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent in the adsorption tower selectively adsorbs the gaseous water, carbon dioxide, and some nitrogen components in the air in order. Components such as oxygen and argon are discharged from the outlet into the adsorption tower in the second stage pressure swing adsorption device.
  • the molecular sieve in the adsorption tower selectively adsorbs nitrogen, and components such as oxygen and argon that are not easily adsorbed are discharged from the outlet.
  • the oxygen-rich buffer tank of the product, the third stage pressure swing adsorption device is used to further remove nitrogen and argon in the mixed gas flowing out of the adsorption tower adsorption step of the second stage pressure swing adsorption device, and raise the oxygen to 99.5% ( V) or more.
  • the oxygen concentration in the exit gas of the adsorption tower in the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower sequentially undergoes adsorption A, replacement P ', and vacuum VC in a cycle;
  • the second stage PSA device is in the adsorption tower outlet gas at the adsorption step to control the oxygen concentration at 70 ⁇ 95 % (V), its adsorption tower in a cycle in turn undergoes adsorption A, reverse pressure equalization and pressure reduction BD ', the final step-up FR PSA process steps
  • the third stage PSA device transforms the second stage
  • the oxygen concentration in the exit gas of the adsorption tower of the adsorption device in the adsorption step is increased to 99.5% (V).
  • the adsorption tower of the third stage pressure swing adsorption device sequentially undergoes adsorption A, product oxygen replacement P ', product in a cycle.
  • the oxygen pressure reduction D and the replacement gas pressure increase R 'pressure swing adsorption process steps. .
  • the 1A tower has completed the final step-up FR step.
  • the program-controlled valves 11A and 12A are opened, and the air enters the adsorption tower 1A through the pipe G1.
  • the adsorbent selectively adsorbs water and carbon dioxide in the air in order.
  • some components such as nitrogen, some non-adsorbed nitrogen and difficult-to-adsorb argon flow out from the outlet end and enter the adsorption tower of the second stage pressure swing adsorption device in the adsorption step.
  • the program-controlled valves 1 1 A and 12A are closed, and the nitrogen concentration in the outlet gas is controlled to 70 ⁇ 78% (V).
  • the program-controlled valves 16A, 14A, and 14C are closed, and the outlet gas of the vacuum pump is used to enter the 1C tower through the pipelines G16 and G14 to perform the replacement gas boosting of the 1C tower (referred to as R '). After the nitrogen concentration in the 1A tower meets the requirements , Close the programmed valves 16A, 14A and 14C.
  • the program-controlled valve 15A was opened, and the water, carbon dioxide, and nitrogen adsorbed by the adsorbent were evacuated or used as a product from the bottom of the adsorption tower with a vacuum pump, and the adsorbent was regenerated.
  • the program-controlled valves 25a, 14A, and KV8 are opened, and the pressure in the second stage of the pressure swing adsorption device 2a is used to reverse pressure equalize and depressurize.
  • the program-controlled valves KV6 and 13A are opened, and the 1A tower is boosted from the top using the adsorption tower outlet gas in the adsorption step.
  • the program control is closed. Valves KV6 and 13A.
  • the 1A tower has completed one cycle and can enter the next cycle.
  • the steps of 1B ⁇ 1D adsorption tower are the same as those of 1A tower, except that the time is staggered with each other, as shown in Figure 1 and Figure 4.
  • the 2a tower has completed the final step-up FR step, the program-controlled valves 21a, 22a are opened, and the intermediate mixed gas enters the adsorption tower 2a through the pipe G21.
  • the first stage pressure swing adsorption device is in the adsorption step for adsorption.
  • the outlet gas from the tower is sent to the adsorption tower in the second stage pressure swing adsorption device in the adsorption step.
  • the adsorbent in the adsorption tower selectively adsorbs nitrogen, and the components such as oxygen and argon, which are not easily adsorbed, are discharged from the outlet into the oxygen-rich buffer tank. Or the next section. Over time, the total amount of nitrogen adsorbed by the adsorbent increases. When the adsorbed nitrogen is saturated, the intake of gas is stopped. At this time, the adsorption ends and the program valves 21a and 22a are closed.
  • the program-controlled valves 25a, 14A, and KV8 are opened, and the gas in the adsorption tower 2a is reversely discharged into the adsorption tower 1A to increase the pressure.
  • the program-controlled valves KV7 and 23a are opened, and the tower 2a pressure is increased from the top by using the adsorption tower outlet gas in the adsorption step. And 23a.
  • Tower A has completed one cycle and can enter the next cycle.
  • the 2b ⁇ 2h adsorption tower has the same cycle steps as the 2a tower, except that they are staggered in time, as shown in Fig. 2 and Fig. 4.
  • the 3A column has completed the step of replacing the gas boost R ′, and the program-controlled valve 31A is opened.
  • the oxygen-rich gas enters the adsorption tower 3A through the pipe G31, and the pressure of the adsorption tower 3A is increased to the adsorption pressure.
  • the program-controlled valve 32A is opened.
  • the adsorbent selectively adsorbs the oxygen in the oxygen-enriched gas mixture in sequence, and components such as unadsorbed nitrogen and argon flow out of the outlet to be vented or used. As time passes, the oxygen adsorbed by the adsorbent The total amount keeps increasing.
  • the air intake is stopped. At this time, the adsorption ends, and the program-controlled valves 31A and 32A are closed.
  • the oxygen concentration in the outlet gas is controlled to 5-50% (V).
  • the program-controlled valves 36A, 34A, and 34C are opened, and the compressor outlet gas enters the 3C tower through the pipelines G36 and G33 to perform the replacement gas boosting of the 3C tower (referred to as R ').
  • R ' replacement gas boosting of the 3C tower
  • the program-controlled valves 33A, 36B, 34B and 34D are closed first, and the product oxygen is released from the adsorption tower and pressurized to the adsorption pressure to replace the 3B adsorption tower. Later, the program-controlled valve 35A is closed. Product oxygen is released into the next section.
  • step D Depressurize the product oxygen
  • step D open the program-controlled valve 34A, and replace the outlet gas from step P 'with a 3C adsorption tower to boost the adsorption tower.
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 2 of the present invention is a diagrammatic representation of Embodiment 2 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower in the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the outlet gas of the adsorption tower in the second stage of the pressure swing adsorption device in the adsorption step is controlled to 93% (V) (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and ⁇ from the mixed gas flowing out of the adsorption step of the adsorption tower in the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the concentration of oxygen in the exit gas of the adsorption tower at the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, displacement P ', vacuum VC, and
  • the third stage gas reverses the third pressure equalization pressure boost 2ER3, the second stage gas reverses the second pressure equalization pressure boost 2ER2, the second phase gas reverses the first pressure equalization pressure boost 2ER1, the replacement gas pressure boost R ', and the final pressure FR changes Pressure adsorption process steps;
  • the oxygen concentration in the outlet gas of the adsorption tower at the adsorption stage of the second stage pressure swing adsorption device is controlled to about 93% (V), and its adsorption tower undergoes adsorption A and forward pressure drop in a cycle.
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption tower adsorption step of the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more
  • the adsorption tower of the third stage PSA device in a cycle During the cycle, adsorption A, product oxygen replacement P ', product oxygen pressure D, and gas exchange pressure R' pressure swing adsorption process steps are sequentially performed.
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 3 of the present invention is a diagrammatic representation of Embodiment 3 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the gas at the exit of the adsorption tower in the first stage of the PSA device during the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the gas at the exit of the adsorption tower in the second stage of the PSA device during the adsorption step is controlled to 93% (V) around (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower in the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the oxygen concentration in the exit gas of the adsorption tower at the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, replacement P ′, vacuum VC, and
  • the third stage gas reverses the third pressure equalization pressure boost 2ER3, the second stage gas reverses the second pressure equalization pressure boost 2ER2, the second phase gas reverses the first pressure equalization pressure boost 2ER1, the replacement gas pressure boost R ', and the final pressure FR changes Pressure adsorption process steps;
  • the oxygen concentration in the outlet gas of the adsorption tower at the adsorption stage of the second stage pressure swing adsorption device is controlled at about 93% (V), and its adsorption tower undergoes adsorption A, forward pressure drop in sequence in a cycle.
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption tower adsorption step of the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more
  • the adsorption tower of the third stage PSA device in a cycle Successively subjected to adsorption period A, the equalization falling forward ED, oxygen product permutation P ', oxygen product Buck D, the displacement gas boost R', backward equalization rising step ER pressure swing adsorption process.
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 4 of the present invention is a diagrammatic representation of Embodiment 4 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the gas at the exit of the adsorption tower in the first stage of the PSA device during the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the gas at the exit of the adsorption tower in the second stage of the PSA device during the adsorption step is controlled to 93% (V) around (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower in the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the air composition of this embodiment is as follows: Pressure: 0. 2 MPa (G)
  • the adsorbent filled from bottom to top in the pressure swing adsorption device of the first stage is activated alumina and molecular sieve in turn.
  • the adsorbent filled in the pressure swing adsorption device of the second stage is molecular sieve, and the third stage is changed.
  • the adsorbent filled in the adsorption tower of the pressure adsorption device is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air, and the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the adsorption tower of the device is further removed, and the oxygen is increased to the required concentration
  • the oxygen concentration in the exit gas of the adsorption tower at the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, replacement P ′, vacuum VC, and
  • the third stage gas reverses the third pressure equalization pressure boost 2ER3, the second stage gas reverses the second pressure equalization pressure boost 2ER2, the second phase gas reverses the first pressure equalization pressure boost 2ER1, the replacement gas pressure boost R ', and the final pressure FR changes 'Pressure adsorption process' step;
  • the second stage of the PSA device is in the adsorption tower outlet gas in the adsorption step to control the oxygen concentration at about 10 93% (V), its adsorption tower in a cycle in turn undergoes adsorption A, reverse first The second pressure equalization pressure reduction BID ', the reverse second pressure equalization pressure reduction B2D', the reverse third pressure equalization pressure reduction B3D ', and the final step-up FR
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 5 of the present invention is a diagrammatic representation of Embodiment 5 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the gas at the exit of the adsorption tower in the first stage of the PSA device during the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the gas at the exit of the adsorption tower in the second stage of the PSA device during the adsorption step is controlled to 93% (V) around (that is, the product is rich in oxygen).
  • the attached device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower of the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled from bottom to top in the pressure swing adsorption device of the first stage is activated alumina and molecular sieve in turn, the adsorbent filled in the pressure swing adsorption device of the second stage is molecular sieve, and the pressure of the third stage is changed to 0 pressure.
  • the adsorbent filled in the adsorption tower of the adsorption device is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air, and the second pressure swing adsorption device is used for first pressure swing adsorption. Hold The nitrogen in the intermediate gas flowing out of the adsorption step in the adsorption tower is further removed, and the oxygen is raised to the desired concentration. The oxygen concentration in the outlet gas of the adsorption tower in the first step of the pressure swing adsorption device is controlled at
  • the first stage PSA device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower in the second stage PSA device, and increase the oxygen to 99.5% (V) or more
  • the adsorption tower of the three-stage pressure swing adsorption device sequentially undergoes adsorption in a cycle. Oxygen permutation P ', oxygen product Buck D, the displacement gas boost R' pressure swing adsorption process steps.
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 6 of the present invention is a diagrammatic representation of Embodiment 6 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower at the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the outlet gas of the adsorption tower at the second stage of the pressure swing adsorption device in the adsorption step is controlled to 93% (V) (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower in the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the oxygen concentration in the gas at the exit of the adsorption tower at the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A and pressure drop at both ends in a cycle.
  • the second stage PSA device is in the adsorption tower outlet gas at the adsorption step to control the oxygen concentration at 93% ( V), its adsorption tower in a cycle in turn undergoes adsorption A, reverse first pressure equalization pressure drop BID ', reverse second pressure equalization pressure drop B2D', reverse third pressure equalization pressure drop B3D ',
  • the third-stage PSA device is used to remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower of the second-stage PSA device, and increase the oxygen to Above 99.5% (V), the adsorption tower of the third stage pressure swing adsorption device sequentially undergoes adsorption A, forward pressure equalization pressure drop ED, product oxygen replacement P ', product oxygen pressure reduction D, replacement in a cycle.
  • the result of this embodiment is that the oxygen concentration is greater than 99.5% (V), the nitrogen concentration is greater than 99.9% (V), and the oxygen recovery rate is greater than 99.5% (V) o.
  • Embodiment 7 of the present invention is a diagrammatic representation of Embodiment 7 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the gas at the exit of the adsorption tower in the first stage of the PSA device during the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the gas at the exit of the adsorption tower in the second stage of the PSA device during the adsorption step is controlled to 93% (V) (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove the nitrogen and argon in the mixed gas flowing out of the adsorption step of the adsorption tower adsorption step in the second stage pressure swing adsorption device, and raise the oxygen to 99. 5 ° /. (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the oxygen concentration in the gas at the exit of the adsorption tower at the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, pressure equalization and pressure drop 2ED ', Replacement of P ', vacuum VC, second stage gas reverse pressure equalizing pressure boost 2ER3, second stage gas reverse pressure equalizing pressure boost 2ER2, second stage gas reverse pressure equalizing pressure boost 2ER1, both ends are equal Pressure boost 2ER ', replacement gas boost R', and final boost FR PSA process steps; the second PSA device is located at The oxygen concentration in the outlet gas of the adsorption tower in the adsorption temperature and pressure step is controlled at 93 ° /. Around (V), its adsorption tower is at a degree
  • the cycle it experiences adsorption A, forward equalizing pressure drop ED, reverse first pressure equalizing pressure drop BI D ', reverse second pressure equalizing pressure drop B2D', reverse third pressure equalizing pressure drop B3D ',
  • the steps of reverse pressure equalization booster ER and final booster FR pressure swing adsorption process the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption tower adsorption step of the second pressure swing adsorption device.
  • the adsorption tower of the third stage pressure swing adsorption device sequentially undergoes adsorption in one cycle, forward pressure equalization pressure drop ED, product oxygen replacement P ', product Steps of oxygen pressure reduction D, replacement gas pressure boost R ', reverse pressure equalization pressure boost ER pressure swing adsorption.
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 8 of the present invention is a diagrammatic representation of Embodiment 8 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower at the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23 Q /. (V)
  • the oxygen concentration in the outlet gas of the adsorption tower at the adsorption step of the second stage pressure swing adsorption device is controlled at about 93% (V) (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption tower adsorption step of the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the oxygen concentration in the exit gas of the adsorption tower in the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, replacement P ', vacuum VC, and
  • the third stage gas reverses the third equal pressure boost 2ER3, the second stage gas reverses the second equal pressure boost 2ER2, the second stage gas reverses the first equal pressure boost 2ER, the replacement gas boost R ', and the final boost FR transforms Adsorption process steps;
  • the oxygen concentration in the outlet gas of the adsorption tower at the second stage of the pressure swing adsorption device is controlled at about 93% (V), and its adsorption tower undergoes adsorption A, forward pressure equalization and pressure reduction in a cycle.
  • the third stage pressure swing adsorption device is used for nitrogen in the mixed gas flowing out of the adsorption tower adsorption step of the second pressure swing adsorption device And argon are further removed, and the oxygen is increased to more than 99.5% (V).
  • the adsorption tower of the third stage pressure swing adsorption device sequentially undergoes adsorption A, product oxygen replacement P ′, and product oxygen pressure reduction in a cycle.
  • Evacuation VC R 'pressure swing adsorption process steps.
  • the result of this example is that the oxygen concentration is greater than 99.5% (V), the nitrogen concentration is greater than 99.9% (V), and the oxygen recovery rate is greater than 99.5% (V) c
  • Embodiment 9 of the present invention is a diagrammatic representation of Embodiment 9 of the present invention.
  • the raw material gas in this example is air.
  • the oxygen concentration in the gas at the exit of the adsorption tower in the first stage of the PSA device during the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the gas at the exit of the adsorption tower in the second stage of the PSA device during the adsorption step is controlled to 93% (V) around (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the gas mixture that is abruptly adsorbed by the second stage pressure swing adsorption device adsorption tower, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the oxygen concentration in the exit gas of the adsorption tower in the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, replacement P ', vacuum VC, and Segment gas reverse pressure equalization pressure boost 2ER, replacement gas pressure boost R ', and final pressure boost FR PSA process steps:
  • the second stage PSA device is in the adsorption tower outlet gas at the adsorption step to control the oxygen concentration at 70 ⁇ 95% (V), its adsorption tower undergoes the adsorption A, reverse pressure drop BD ′, and final step-up FR PSA process steps in a cycle, and the third stage PSA device is used to transform the second stage The nitrogen and argon in the mixed gas flowing out of the adsorption step of the adsorption tower of the pressure adsorption
  • the adsorption tower of the third stage pressure swing adsorption device is sequentially in a cycle Go through adsorption A, product oxygen replacement P ', product oxygen pressure drop D, vacuum VC, replacement gas pressure boost R' pressure swing adsorption process steps.
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 10 of the present invention is a diagrammatic representation of Embodiment 10 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower at the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the outlet gas of the adsorption tower at the second stage of the pressure swing adsorption device in the adsorption step is controlled to 93% (V) (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower in the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the oxygen concentration in the exit gas of the adsorption tower at the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, replacement P ', vacuum VC, and
  • the third stage gas reverses the third pressure equalization pressure boost 2ER3, the second stage gas reverses the second pressure equalization pressure boost 2ER2, the second phase gas reverses the first pressure equalization pressure boost 2ER1, the replacement gas pressure boost R ', and the final pressure FR changes Pressure adsorption process steps;
  • the oxygen concentration in the outlet gas of the adsorption tower at the adsorption stage of the second stage pressure swing adsorption device is controlled to about 93% (V), and its adsorption tower undergoes adsorption A and forward pressure drop in a cycle.
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption tower adsorption step of the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more
  • the adsorption tower of the third stage pressure swing adsorption device During the cycle, it sequentially undergoes adsorption A, forward equalizing pressure drop ED, product oxygen replacement P ', product oxygen pressure drop D, vacuum VC, replacement gas boost R', reverse equal pressure boost ER pressure swing adsorption process steps .
  • Embodiment 11 of the present invention is that the oxygen concentration is greater than 99.5% (V), and the nitrogen concentration is greater than 99.9% (V).
  • the oxygen recovery rate is greater than 99.5% (V).
  • the source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower at the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the outlet gas of the adsorption tower at the second stage of the pressure swing adsorption device in the adsorption step is controlled to 93% (V) (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower in the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the oxygen concentration in the exit gas of the adsorption tower in the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower sequentially undergoes adsorption A, pressure equalization and pressure drop 2ED ', Replacement P ', vacuum VC, second stage gas reverse third pressure equalization boost 2ER3, second stage gas reverse second pressure equalization boost 2ER2, second stage gas reverse first pressure equalization boost 2ER1, both ends are equal Pressure boost 2ER ', replacement gas boost R', and final boost FR PSA process steps;
  • the second stage PSA device is in the adsorption tower outlet gas at the adsorption step to control the oxygen concentration at about 93% (V), Its adsorption tower sequentially undergoes adsorption A in one cycle, reverse first pressure equalization pressure drop BID ', reverse second pressure equalization pressure drop B
  • the adsorption tower of the third stage pressure swing adsorption device goes through the steps of adsorption A, forward pressure equalization and pressure reduction ED, product oxygen replacement P ', product oxygen pressure reduction D, vacuum VC, replacement gas pressure boost R', and reverse pressure equalization pressure boost ER pressure swing adsorption process steps. .
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 12 of the present invention is a diagrammatic representation of Embodiment 12 of the present invention.
  • the source gas in this example is air.
  • the first stage pressure swing adsorption device is at the exit of the adsorption tower in the adsorption step
  • the oxygen concentration in the gas is controlled at 21 ⁇ 23% (V)
  • the oxygen concentration in the gas at the outlet of the adsorption tower at the second stage of the PSA device is controlled at about 93% (V) (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption tower adsorption step of the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the oxygen concentration in the outlet gas of the adsorption tower in the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23 /. (V), its adsorption tower undergoes adsorption A, pressure drop 2ED ′ at both ends, reverse pressure drop BD, displacement P ′, vacuum VC, second stage gas pressure reverse pressure equalization in a cycle.
  • the second stage pressure swing adsorption device is in the adsorption step, the oxygen concentration in the exit gas of the adsorption tower is controlled at about 93% (V), and its adsorption tower undergoes adsorption A, forward pressure equalization and pressure reduction in a cycle.
  • first reverse pressure equalization pressure reduction BID ' reverse second pressure equalization pressure reduction B2D', reverse third pressure equalization pressure reduction B3D ', reverse pressure equalization pressure boost ER, final pressure boost FR pressure swing adsorption process 5% (V) ⁇
  • the nitrogen and argon in the mixed gas flowing out of the adsorption step in the adsorption step of the second stage of the PSA adsorption tower are further removed, and the oxygen is increased to 99.5% (V) or more
  • the adsorption tower of the third stage pressure swing adsorption device sequentially undergoes adsorption in a cycle 4, the product oxygen substitution P ', oxygen product D buck, boost displacement gas R' pressure swing adsorption process steps.
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 13 of the present invention is a diagrammatic representation of Embodiment 13 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower at the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the outlet gas of the adsorption tower at the second stage of the pressure swing adsorption device in the adsorption step is controlled to 93% (V) (that is, the product is rich in oxygen).
  • Third stage pressure swing suction Attached device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower of the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the air composition of this embodiment is as follows: Pressure: 0. 5 MPa (G)
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the oxygen concentration in the outlet gas of the adsorption tower at the first stage of the pressure swing adsorption device in the adsorption step is controlled at
  • the adsorption tower in this cycle undergoes adsorption A, displacement P ', vacuum VC, second stage gas reverse pressure equalization 3rd pressure boost 2ER3, second stage gas reverse pressure Pressure boost 2ER2, two-stage gas reverse first pressure equalization pressure 2ER1, replacement gas boost R ', final boost FR PSA process steps; the second stage PSA device is at the adsorption tower outlet gas in the adsorption step
  • the oxygen concentration in the medium is controlled at about 93% (V), and its adsorption tower undergoes adsorption A, forward pressure equalization pressure drop ED, reverse first pressure equalization pressure drop BID ', reverse second pressure equalization pressure in a cycle.
  • Step-down B2D ', reverse third equalizing step-down B3D', reverse equalizing step-up ER, final step-up FR PSA process steps the third stage PSA device is used to convert the second stage PSA device
  • the nitrogen and argon in the mixed gas flowing out of the adsorption step of the adsorption tower are further removed, and the oxygen is increased to more than 99.5% (V).
  • the adsorption tower of the third stage pressure swing adsorption device sequentially undergoes adsorption A in a cycle.
  • the second stage of the pressure swing adsorption device reverses the pressure of the first pressure equalizing pressure drop BID' gas into the buffer tank VI for pressure equalization, and then uses the gas in the buffer tank VI and the first stage
  • the pressure swing adsorption device adsorption tower reverses the pressure equalization pressure 2ER1 for the first time to balance the pressure of the adsorption tower;
  • the second stage pressure swing adsorption device reverses the pressure equalization pressure B2D 'of the second pressure reduction pressure gas into the buffer tank V2 for equalization Pressure, and then use the gas in the buffer tank V2 to pressure balance the adsorption tower of the first stage pressure swing adsorption device to reverse the pressure equalization 2ER2; pressure absorption of the second stage pressure swing adsorption device to reverse the third pressure equalization
  • the pressure-reduced B3D 'gas is put into the buffer tank V3 for pressure equalization, and then the gas in the
  • Embodiment 14 of the present invention is that the oxygen concentration is greater than 99.5% (V), and the nitrogen concentration is greater than 99.9 ° /. (V), the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 14 of the present invention is that the oxygen concentration is greater than 99.5% (V), and the nitrogen concentration is greater than 99.9 ° /. (V), the oxygen recovery rate is greater than 99.5% (V).
  • the source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower in the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the outlet gas of the adsorption tower in the second stage of the pressure swing adsorption device in the adsorption step is controlled to 93% (V) around (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and gas from the mixed gas flowing out of the adsorption step of the second stage pressure swing adsorption device adsorption tower, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the first stage of the PSA device is in the adsorption tower outlet gas to control the oxygen concentration at 21 ⁇ 23% (V).
  • the second stage gas reverses the third equal pressure boost 2ER3, the second stage gas reverses the second equal pressure boost 2ER2, the second stage gas reverses the first equal pressure boost 2ER1, the replacement gas boost R ', and the final boost FR Pressure swing adsorption process steps;
  • the second stage pressure swing adsorption device is in the adsorption step at the outlet of the adsorption tower to control the oxygen concentration at about 93% (V), and its adsorption tower undergoes adsorption A in a cycle in turn, the first time in reverse
  • the nitrogen and argon in the mixed gas flowing out of the adsorption step of the adsorption step of the two-stage pressure swing adsorption device are further removed, and the oxygen is increased to more than 99.5% (V).
  • the adsorption tower of the third-stage pressure swing adsorption device is in a cycle. In the cycle, it experiences adsorption eight, product oxygen replacement P ', and product oxygen drop.
  • buffer tank V2 for pressure equalization, and then use the gas in buffer tank V2 to pressure balance with the first stage pressure swing adsorption device adsorption tower to reverse the second pressure equalization pressure boost 2ER2 adsorption tower for pressure equalization; the second stage pressure swing adsorption device adsorbs The gas from the third pressure equalization and pressure reduction B3D 'of the tower is put into the buffer tank V3 into The pressure is balanced, and then the gas in the buffer tank V3 is used to pressure balance the adsorption tower of the first stage pressure swing adsorption device to the pressure tower of the third pressure equalization 2ER3.
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 15 of the present invention is a diagrammatic representation of Embodiment 15 of the present invention.
  • the source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower at the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the outlet gas of the adsorption tower at the second stage of the pressure swing adsorption device in the adsorption step is controlled to 93% (V) around (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower in the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the oxygen concentration in the gas at the exit of the adsorption tower at the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, pressure equalization and pressure drop 2ED ', Replace P ', reverse decompression BD, second stage gas reverse third pressure equalization boost 2ER3, second stage gas reverse second pressure equalization boost 2ER2, second stage gas reverse first pressure equalization boost 2ER1, both ends Equal pressure boost 2ER ', replacement gas boost R', and final boost FR PSA process steps;
  • the second stage PSA device is in the adsorption tower outlet gas at the adsorption step to control the oxygen concentration at about 93% (V)
  • its adsorption tower sequentially undergoes adsorption A, forward equalizing pressure drop ED, reverse first pressure equalizing pressure drop B1
  • the source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower in the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the outlet gas of the adsorption tower in the second stage of the pressure swing adsorption device in the adsorption step is controlled to 93% (V) around (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower in the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the concentration of oxygen in the exit gas of the adsorption tower in the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, pressure drop 2ED ', Evacuation VC :, the second stage gas reverses the third equalizing pressure boost 2ER3, the second stage gas reverses the second equalizing pressure boost 2ER2, the second stage gas reverses the first equalizing pressure boost 2ER1, and the both ends are equalized pressure boost 2ER ', the final step-up FR PSA process step; the second stage PSA device is in the adsorption tower outlet gas at the adsorption step to control the oxygen concentration at about 93% (V), and its adsorption tower undergoes one cycle in turn Adsorption A, reverse first pressure equalization pressure drop BID ', reverse second pressure equalization pressure drop B2
  • the third stage pressure swing adsorption The adsorption tower of the device sequentially undergoes adsorption in a cycle A, oxygen product permutation P ', oxygen product Buck D, the displacement gas boost R' step of the pressure swing adsorption process.
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 17 of the present invention The source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower at the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the outlet gas of the adsorption tower at the second stage of the pressure swing adsorption device in the adsorption step is controlled to 93% (V) around (that is, the product is rich in oxygen).
  • the third stage pressure swing adsorption device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption tower adsorption step of the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the oxygen concentration in the exit gas of the adsorption tower in the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, replacement P ', vacuum VC, and
  • the third stage gas reverses the third pressure equalization pressure boost 2ER3, the second stage gas reverses the second pressure equalization pressure boost 2ER2, the second phase gas reverses the first pressure equalization pressure boost 2ER1, the replacement gas pressure boost R ', and the final pressure FR changes Pressure adsorption process steps;
  • the second stage pressure swing adsorption device is in the adsorption step at the outlet gas of the adsorption tower to control the oxygen concentration at about 93% (V), and its adsorption tower sequentially undergoes adsorption A in a cycle, the first time in the reverse direction
  • the pressure reduction pressure BID ' the pressure reduction pressure BID
  • the nitrogen and argon in the mixed gas flowing out of the adsorption step of the adsorption step of the pressure swing adsorption device are further removed, and the oxygen is increased to more than 99.5% (V).
  • the adsorption tower of the third pressure swing adsorption device is in a cycle Adsorption A, forward equalization pressure drop ED, oxygen product Buck D, ER reverse equalization rising step of the pressure swing adsorption process.
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • Embodiment 18 of the invention is a diagrammatic representation of Embodiment 18 of the invention.
  • the source gas in this example is air.
  • the oxygen concentration in the outlet gas of the adsorption tower in the first stage of the pressure swing adsorption device in the adsorption step is controlled to 21 ⁇ 23% (V)
  • the oxygen concentration in the outlet gas of the adsorption tower in the second stage of the pressure swing adsorption device in the adsorption step is controlled to 93% (V) around (that is, the product is rich in oxygen).
  • Third stage pressure swing suction Attached device is used to further remove nitrogen and argon from the mixed gas flowing out of the adsorption step of the adsorption tower of the second stage pressure swing adsorption device, and increase the oxygen to 99.5% (V) or more.
  • the air composition of this embodiment is as follows ⁇
  • the adsorbent filled in the first stage of the PSA adsorption tower from bottom to top is activated alumina and molecular sieve
  • the adsorbent packed in the second stage of the PSA adsorption tower is molecular sieve
  • the third stage of the PSA is
  • the adsorbent packed in the adsorption tower is a carbon molecular sieve or an oxygen adsorption equilibrium adsorbent.
  • the three-stage pressure swing adsorption device is operated in series.
  • the first stage pressure swing adsorption device removes gaseous water, carbon dioxide and some nitrogen in the air
  • the second pressure swing adsorption device is used for first pressure swing adsorption.
  • the nitrogen in the intermediate gas flowing out of the adsorption step of the device is further removed, and the oxygen is raised to the desired concentration.
  • the oxygen concentration in the exit gas of the adsorption tower in the adsorption step is controlled to 21 ⁇ 23% (V), and its adsorption tower undergoes adsorption A, replacement P ', vacuum VC, and
  • the third stage gas reverses the third pressure equalization pressure boost 2ER3, the second stage gas reverses the second pressure equalization pressure boost 2ER2, the second phase gas reverses the first pressure equalization pressure boost 2ER1, the replacement gas pressure boost R ', and the final pressure FR changes Pressure adsorption process steps;
  • the second stage pressure swing adsorption device is in the adsorption step at the outlet gas of the adsorption tower to control the oxygen concentration at about 93% (V), and its adsorption tower sequentially undergoes adsorption A in a cycle, the first time in the reverse direction
  • the oxygen concentration is greater than 99.5% (V)
  • the nitrogen concentration is greater than 99.9% (V)
  • the oxygen recovery rate is greater than 99.5% (V).
  • the invention can be widely used in industrial fields such as chemical industry, petrochemical industry, pharmacy, building materials and environmental protection.

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Description

采用三段变压吸附装置生产氧气的方法 技术领域
本发明涉及采用三段变压吸附装置生产氧气的方法。 背景技术
目前, 采用三段变压吸附技术从空气中生产纯氧的方法, 国内外还没有 公开的专利文献和资料报道。 现有技术全都采用两段变压吸附装置从空气中 生产纯氧, 如中国专利公开号 CN1252322A,美国专利 US4190424、 US4595083 及 US5395427等均采用两段变压吸附装置从空气中生产富氧, 现有技术的吸 附塔在解吸放空前, 其氧气浓度较高。 氧气回收率低, 使整个制氧装置的电 耗和投资很高。 发明的公开
本发明的目的就是提供一种三段变压吸附装置生产氧气的方法, 该方法 克服了现有技术的上述问题,提高整个装置的氧气回收率,与现有技术相比大 幅度节省电耗和投资。
本发明采用三段变压吸附装置从空气中分离氮气和氧气,产品可以是纯 氧,也可以是纯氮,还可以同时是纯氧气和纯氮气, 此方法采用三段变压吸附 装置串联操作, 第一段变压吸附装置用于脱除二氧化碳、 水和部分氮气并将 氮气提浓, 第二段变压吸附装置用于将第一段变压吸附装置吸附塔吸附步骤 流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓度, 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的富氧混合气的氮气 和氩气进一步脱除, 并把氧提高至 95V%以上, 第一段变压吸附装置的吸附塔 在一个循环周期中依次经历吸附 A、 置换 P '、 抽真空 VC;、 二段气逆向均压升 压 2ER、 置换气升压 R'、 最终升压 FR变压吸附工艺步骤; 第二段变压吸附装 置的吸附塔在一个循环周期中依次经历吸附 、逆向均压降压 BD'、最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置的吸附塔在一个循环周期中依次 经历吸附 、 产品氧气置换 P'、 产品氧气降压 D、 置换气升压 R'变压吸附工 艺步骤。
在第二段变压吸附装置吸附塔在吸附 A工艺步骤之后增加顺向均压降压 ED工艺步骤,同时在逆向均压降压 BD '工艺步骤完成后增加逆向升压 ER工艺 步骤,升压 ER工艺步骤的混合气来自降压 ED工艺步骤和(或) 在第三段变压 吸附装置吸附塔在吸附 A工艺步骤之后增加顺向均压降压 ED工艺步骤,同时 在置换气升压 R'工艺步骤完成后增加逆向升压 ER工艺步骤,升压 ER工艺步 . 骤的混合气来自降压 ED工艺步骤。
第一段变压吸附装置吸附塔在吸附 A 工艺步骤之后增加两端均压降压 2ED'工艺步骤, 同时在二段气逆向均压升压 2ER工艺步骤完成后增加两端均 压升压 2ER'工艺步骤, 两端均压升压 2ER'工艺步骤的混合气来自均压降压 2ED'工艺步骤。
第三段变压吸附装置吸附塔在产品氧气降压 D工艺步骤之后增加抽真空 VC工艺步骤。
第一段变压吸附装置吸附塔在置换 P '工艺步骤之后增加逆向降压 BD工 艺步骤。
第二段变压吸附装置吸附塔逆向均压降压 BD'工艺步骤放出的混合气进 入缓冲罐 V,直到压力平衡为止,同时第一段变压吸附装置吸附塔在进行二段 气逆向均压升压 2ER工艺步骤时,吸附塔与缓冲罐 V连通, 直到压力平衡为 止。
第一段变压吸附装置吸附塔吸附步骤出口气中氧气的平均浓度为 21〜 80 V %。
第一段变压吸附装置吸附塔吸附步骤出口气中氧气的平均浓度为 21〜 25V%。
- 三段变压吸附装置吸附步骤 A的压力为 0. 001〜0. 6 Pa表压或第一和第 二段变压吸附装置吸附步骤 A的压力为 0. 001〜0. 05MPa表压,第三段变压吸 附装置吸附步骤 A的压力为 0. 1〜0. 6MPa表压。
第一段变压吸附装置吸附塔内由下到上装填的吸附剂为活性氧化铝及分 子筛; 第二段变压吸附装置吸附塔内装填的吸附剂只为分子筛; 第三段变压 吸附装置吸附塔内装填的吸附剂为氧吸附平衡吸附剂或动力学选择吸附氧的 吸附剂。
第二段变压吸附装置吸附塔逆向均压降压 ED '和第一段变压吸附装置吸 附塔二段气逆向均压升压 2ER的次数大于或等于 1。
第二段变压吸附装置吸附塔逆向均压降压 ED'和第一段变压吸附装置吸 附塔二段气逆向均压升压 2ER的次数为 3〜7次。
本发明采用三段变压吸附装置从空气中分离氮气和氧气,产品可以是纯 氧,也可以是纯氮,还可以同时是纯氧气和纯氮气, 此方法采用三段变压吸附 装置串联操作, 第一段变压吸附装置用于脱除二氧化碳、 水和部分氮气并将 氮气提浓, 第二段变压吸附装置用于将第一段变压吸附装置吸附塔吸附步骤 . 流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓度, 第一段变压吸 附装置的吸附塔在一个循环周期中依次经历吸附 A、 两端均压降压 2ED'、 置 换 P'、 逆向降压 BD、 二段气逆向均压升压 2ER、 两端均压升压 2ER'、 置换气 升压 R'、 最终升压' FR变压吸附工艺步骤; 第二段变压吸附装置吸附塔在一 个循环周期中依次经历吸附 A、 顺向均压降压 ED、 逆向均压降压 BD'、 逆向 均压升压 ER、 最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置的吸附 塔在一个循环周期中依次经历吸附 A、 产品氧气置换 P '、 产品氧气降压 D、 置换气升压 R'变压吸附工艺步骤。
三段变压吸附装置吸附步骤 A的压力为 0. 2〜0. 6MPa表压。
本发明采用三段变压吸附装置从空气中分离氮气和氧气,产品可以是纯 氧,也可以是纯氮,还可以同时是纯氧气和纯氮气, 此方法采用三段变压吸附 装置串联操作, 第一段变压吸附装置用于脱除二氧化碳、 水和部分氮气并将 氮气提浓, 第二段变压吸附装置用于将第一段变压吸附装置吸附塔吸附步骤 流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓度, 第一段变压吸 附装置的吸附塔在一个循环周期中依次经历吸附 A、 两端均压降压 2ED'、 抽 真空 VC、 二段气逆向均压升压 2ER、 两端均压升压 2ER'、 最终升压 FR变压 吸附工艺步骤; 第二段变压吸附装置的吸附塔在一个循环周期中依次经历吸 附4、 逆向均压降压 BD'、 最终升压 FR变压吸附工艺步骤, 第三段变压吸附 装置的吸附塔在一个循环周期中依次经历吸附 A、 产品氧气置换 P '、 产品氧 气降压 D、 置换气升压 R'变压吸附工艺步骤。
本发明采用三段变压吸附装置从空气中分离氮气和氧气,产品可以是纯 氧,也可以是纯氮,还可以同时是纯氧气和纯氮气, 此方法采用三段变压吸附 装置串联操作, 第一段变压吸附装置用于脱除二氧化碳、 水和部分氮气并将 氮气提浓, 第二段变压吸附装置用于将第一段变压吸附装置吸附塔吸附步骤 流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓度, 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的富氧混合气的氮气 和氩气进一步脱除, 并把氧提高至 95V%以上, 第一段变压吸附装置的吸附塔 在一个循环周期中依次经历吸附 A、 置换 P '、 抽真空 VC:、 二段气逆向均压升 压 2ER、 置换气升压 R'、最终升压 FR变压吸附工艺步骤; 第二段变压吸附装 置的吸附塔在一个循环周期中依次经历吸附 、逆向均压降压 BD'、最终升压 FR变压吸附工艺步骤,第三段变压吸附装置的吸附塔在一个循环周期中依次 经历吸附4、 顺向均压降压 ED、 产品氧气降压 D、 逆向均压升压 ER变压吸附 工艺步骤。
第三段变压吸附装置吸附塔在产品氧气降压 D工艺步骤之后增加抽真空 VC工艺步骤。
本发明采用三段变压吸附装置从空气中分离氮气和氧气,产品可以是纯 氧,也可以是纯氮,还可以同时是纯氧气和纯氮气, 此方法采用三段变压吸附 装置串眹操作, 第一段变压吸附装置用于脱除二氧化碳、 水和部分氮气并将 氮气提浓, 第二段变压吸附装置用于将第一段变压吸附装置吸附塔吸附步骤 流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓度, 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的富氧混合气的氮气 和氩气进一步脱除, 并把氧提高至 95V%以上, 第一段变压吸附装置的吸附塔 在一个循环周期中依次经历吸附 A、 置换 P'、 抽真空 ' VC;、 二段气逆向均压升 压 2ER、 置换气升压 R'、最终升压 FR变压吸附工艺步骤; 第二段变压吸附装 置的吸附塔在一个循环周期中依次经历吸附八、逆向均压降压 BD '、最终升压 FR变压吸附工艺步骤,第三段变压吸附装置的吸附塔在一个循环周期中依次 经历吸附 、 顺向均压降压 ED、 抽真空 VC:、 逆向均压升压 ER变压吸附工艺 步骤。 附图的简要说明
图 1是实施例第一段变压吸附装置的工艺步骤运行程序表。
图 2是实施例第二段变压吸附装置的工艺步骤运行程序表。
图 3是实施例第三段变压吸附装置的工艺步骤运行程序表。
图 4是实施例 1的工艺流程图。 实现本发明的最佳方式
本发明原料气是空气, 其典型组成如下表:
Figure imgf000006_0001
本发明采用三段变压吸附技术从空气中生产富氧, 此方法采用三段变压 吸附装置串联操作, 第一段变压吸附装置用于脱除气态水、 二氧化碳及部分 氮气, 吸附塔吸附步骤出口气中氧气的平均浓度为 21〜80°/。 ( V ) , 吸附塔内 由下到上装填的吸附剂为活性氧化铝及分子筛; 第二段变压吸附装置用于将 第一段变压吸附装置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把 氧提高至所需的浓度, 吸附塔内装填的吸附剂为分子筛, 第三段变压吸附装 置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩进一 步脱除, 并把氧提高到 99. 5% (V)以上, 吸附塔内装填的吸附剂为碳分子筛或 氧吸附平衡吸附剂。 三段变压吸附装置吸附步骤 A的压力为 0. 001〜0. 6MPa (表压)。 三段变压吸附装置的每个吸附塔在一个循环中依次经历如下步骤。
第一段变压吸附装置:
(1) 吸附 A
将空气送入处于吸附步骤的吸附塔进料口, 吸附塔中的吸附剂选择性地 依次吸附空气中的水、 二氧化碳及部分氮气等组分, 未吸附的部分氮气和不 易吸附的氩气等组分从出口端流出进入第二段变压吸附装置处于吸附步骤的 吸附塔, 随着时间的推移, 吸附剂吸附的水、 二氧化碳及部分氮气等组分的 总量不断增加, 当吸附剂吸附上述组分饱和时, 停止进气, 此时吸附结束。
(2) 两端均压降压 2ED'
吸附结束后, 吸附塔内死空间气体中氧气浓度较高, 这部分氧气需回收 利用, 为此, 把吸附塔内的气体从上下两端降压。 死空间气体从吸附塔进出 口排出进入本段已完成二段气逆向均压升压 2ER步骤的相应吸附塔进行两端 升压 2ER'。 两端均压降压 2ED'次数可为 1次或 1次以上(如 1〜3次)。
吸附结束后, 还可以只顺向均压降压或逆向均压降压。
(3)置换 P '
两端均压降压 2ED'步骤结束后,用第一段抽真空 VC步骤的气体从吸附塔 的底部进入将塔内残留的氧气置换出去,从吸附塔置换出来的混合气进入本 段已完成二段气逆向均压升压 2ER步骤或两端均压升压 2ER'步骤的相应吸附 塔进行置换气体升压 R'。
(4)逆放 BD
置换 P'结束后,将这部分气体逆向从吸附塔底部放空或作为产品。
(5)抽真空 VC
置换 P'结束后, 从吸附塔底部用真空泵将吸附剂吸附的水、 二氧化碳和 氮抽出来放空, 使吸附剂得到再生。
(6)二段气逆向均压升压 2ER
抽真空 VC结束后,利用第二段变压吸附装置吸附塔吸附结束或顺向均压 降压 ED完成后的气体进入本段已完成抽真空 VC步骤的吸附塔, 对吸附塔升 压。 二段气逆向均压升压 2ER次数可为 1次或 1次以上(如 1〜7次)。
(7)两端均压升压 2ER'
二段气逆向均压升压 2ER结束后, 利用本段两端均压降压 2ED '步骤排出 的气体,从进出口端进入吸附塔,使吸附塔逐步升高压力,两端均压升压 2ER' 与两端均压降压 2ED '的次数相等。 每次两端均压升压 2ER'的气体来自不同 吸附塔的两端均压降压 2ED '气体。本段吸附塔两端均压升压 2ER'步骤与通 常的均压升压 ER步骤有所不同, 通常的吸附塔均压升压 ER步骤气体是从吸 附塔的出口端进入,而本段吸附塔两端均压升压 2ER'步骤气体是从吸附塔的 进出口两端进入。
(8)置换气升压 R'
两端均压升压 2ER'或二段气逆向均压升压 2ER结束后,用本段处于置换 P'步骤的吸附塔出口气体进行升压。 (9)最终升压 FR
- ' 置换气升压 R '结束后,利用处于吸附步骤的吸附塔出口气从顶端对吸阳 塔进行升压, 直至升到吸附压力, 也可以利用原料空气对吸附塔升到吸附压 力。
5 第二段变压吸附装置
(1) 吸附 A
将第一段变压吸附装置处于吸附步骤的吸附塔出口气送入第二段变压吸 附装置处于吸附步骤的吸附塔, 吸附塔中的吸附剂选择性地吸附氮气, 不易 吸附的氧气和氩气等组分从出口端排出进入富氧缓冲罐或下一工段。 随着时 0 间的推移, 吸附剂吸附的氮气总量不断增加, 当吸附剂吸附氮气饱和时, 停 ' 止进气, 此时吸附结束, 出口气中氧气浓度控制在产品要求的水平。
(2) 顺向均压降压 ED
吸附结束后, 吸附塔内死空间气体从吸附塔出口排出进入本段已¾成逆 向均压降压 BD'步骤的相应吸附塔升压, 两塔压力可以相等, 也可以不相等, 5 以保证产品富氧浓度满足要求。顺向均压降压 ED次数可为 1次或 1次以上 (如 1〜3次)。
(3)逆向均压降压 BD'
吸附或顺向均压降压 ED结束后,逆向从吸附塔底部将塔内的气体分次对 第一段已经完成抽真空 VC的吸附塔直接进行二段气逆向均压升压 2ER。逆向 0 均压降压 BD次数可为 1次或 1次以上(如 1〜7次)。。
在逆向从吸附塔底部将塔内的气体分次对第一段已经完成抽真空 vc 的 吸附塔进行二段气逆向均压升压 2ER 时,还可以将吸附塔内气体先逆向放入 一个缓冲罐, 然后再将缓冲罐中的气体送入第一段变压吸附装置抽真空 VC 结束后的吸附塔进行二段气逆向均压升压 2ER,缓冲罐的数量与逆向均压降 5 压 BD'的次数相等。
(4)逆向升压 ER
逆向均压降压 BD '结束后, 利用顺向均压降压 ED步骤排出的气体, 从出 口端进入吸附塔, 使吸附塔升高压力。
(5)最终升压 FR
0 利用处于吸附步骤的吸附塔出口气从顶端对吸附塔进行升压, 直至升到 吸附压力。
第三段变压吸附装置:
(1) 吸附 A
将富氧混合气送入处于吸附步骤的吸附塔进料口, 吸附塔中的吸附剂选 5 择性地依次吸附富氧混合气中的氧气等组分, 未吸附的氮气或氩气等组分从 出口端流出放空或他用, 随着时间的推移, 吸附剂吸附的氧气等组分的总量 不断增加, 当吸附剂吸附上述氧气饱和时, 停止进气, 此时吸附结束。
(2)顺向均压降压 ED
吸附结束后, 吸附塔内死空间气体从吸附塔出口排出进入本段已完成置 换气升压 R'步骤的相应吸附塔升压, 两塔压力可以相等, 也可以不相等, 以 保证产品氧气浓度满足要求。 顺向均压降压 ED次数可为 1次或 1次以上(如 1〜3次)。
(3)置换 P '
顺向均压降压 ED步骤结束后,把本段已经完成置换 P'步骤的吸附塔内产 品氧气加压从吸附塔底部进入将塔内残留的氮气和氩气置换出去,从吸附塔 置换出来的混合气进入本段已完成降压 D步骤或抽真空 VC步骤的相应吸附塔 进行置换气体升压 R '。
(4)产品氧气降压 D
置换 P '结束后,将这部分气体从吸附塔放出,一部分作为产品,一部分经 过加压后去置换吸附塔内的吸附剂。
(5)抽真空 VC
置换 P '或顺向均压降压 ED或产品氧气降压 D结束后, 从吸附塔底部用 真空泵将吸附剂吸附的纯氧抽出来进入下一工段, 同时使吸附剂得到再生。
(6)置换气升压 R'
产品氧气降压 D或抽真空 VC步骤结束后,用本段另一处于置换步骤的吸 附塔出口气对吸附塔进行升压。
(7)逆向均压升压 ER
产品氧气降压 D或置换气升压 R'或抽真空 VC结束后,利用顺向均压降压 ED步骤排出的气体, 从出口端进入吸附塔, 使吸附塔升高压力。
本发明的实施例 1 :
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出 U 气中氧气浓度控制在 21〜23% (V ) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000009_0001
温度: 45 °C 压力: 0. 6 MPa (G )
如图 4所示, 吸附塔 1A〜1D共 4台组成第一段变压吸附装置。 吸附塔内 由下到上装填的吸附剂依次为活性氧化铝及分子筛, 运行单塔吸附一次均压 程序, 通过真空泵 P1利用真空管线 G15对吸附塔抽真空; 吸附塔 2A〜2D共 4 台组成第二段变压吸附装置。 吸附塔内装填的吸附剂为分子筛, 运行单塔 吸附一次均压程序; 吸附塔 3A〜3D共 4台组成第三段变压吸附装置。吸附塔 内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂, 运行单塔吸附置换降压程 序。 本实施例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除 空气中的气态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段 变压吸附装置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高 至所需的浓度。 第三段变压吸附装置用于将第二段变压吸附装置吸附塔吸附 步骤流出的混合气中的氮和氩进一步脱除, 并把氧提高到 99. 5% (V)以上。
空气进入第一段变压吸附装置处于吸附步骤的吸附塔, 吸附塔中的吸附 剂选择性地依次吸附空气中的气态水、 二氧化碳及部分氮气等组分, 未吸附 的部分氮和不易吸附的氧和氩等组分从出口端排出进入第二段变压吸附装置 处于吸附步骤的吸附塔, 吸附塔中的分子筛选择性地吸附氮气, 不易吸附的 氧和氩等组分从出口端排出进入产品富氧缓冲罐, 第三段变压吸附装置用于 将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩进一步脱 除, 并把氧提高到 99. 5% (V)以上。 第一段变压吸附装置处于吸附步骤的吸附 塔出口气中氧气浓度控制在 21〜23% ( V ) , 其吸附塔在一个循环周期中依次 经历吸附 A、置换 P'、抽真空 VC;、二段气逆向均压升压 2ER、置换气升压 R'、 最终升压 FR变压吸附工艺步骤;第二段变压吸附装置处于吸附步骤的吸附塔 出口气中氧气浓度控制在 70〜95% ( V )左右, 其吸附塔在一个循环周期中依 次经历吸附 A、 逆向均压降压 BD'、 最终升压 FR变压吸附工艺步骤, 第三段 变压吸附装置把第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓 度提高至 99. 5% (V),第三段变压吸附装置的吸附塔在一个循环周期中依次经 历吸附 A、 产品氧气置换 P'、 产品氧气降压 D、 置换气升压 R'变压吸附工艺 步骤。。
现以 1A塔为例, 对照图 1和图 4, 说明本实施例第一段变压吸附装置吸附 塔在一个循环过程中的工艺步骤- (1) 吸附 A
此时, 1A塔已完成最终升压 FR步骤, 打开程控阀 1 1A、 12A, 空气经管道 G1 1进入吸附塔 1A, 在吸附塔 1A中, 吸附剂选择性地依次吸附空气中的水、 二氧化碳及部分氮气等组分,未吸附的部分氮气和不易吸附的氩气等组分从出 口端流出进入第二段变压吸附装置处于吸附步骤的吸附塔, 随着时间的推移, 吸附剂吸附的水、二氧化碳及部分氮气等组分的总量不断增加, 当吸附剂吸附 上述组分饱和时, 停止进气, 此时吸附结束, 关闭程控阀 1 1 A、 12A , 出口气 • 中氮气浓度控制在 70〜78% ( V )。
(2)置换 P '
吸附结束后, 打幵程控阀 16A、 14A和 14C, 用真空泵出口气体经管道 G16 和 G14进入 1C塔对 1C塔进行置换气升压(简称 R' ) , 当 1A塔内的氮气浓度满 足要求后, 关闭程控阀 16A、 14A和 14C。
(3) 抽真空 VC
置换 P'结束后, 打开程控阀 15A,从吸附塔底部用真空泵将吸附剂吸附的 水、 二氧化碳和氮抽出来放空或作为产品, 同时使吸附剂得到再生。
(4)二段气逆向均压升压 2ER
抽真空 VC结束后, 打开程控阀 25a、 14A和 KV8, 利用第二段变压吸附 装置吸附塔 2a逆向均压降压 BD '步骤的气体进入吸附塔 1A, 对吸附塔 1A升 压。
(5)最终升压 FR
二段气逆向均压升压 2ER结束后, 打开程控阀 KV6和 13A, 利用处于吸 附步骤的吸附塔出口气从顶端对 1A塔进行升压, 当 1A塔压力升至接近吸附 压力时, 关闭程控阀 KV6和 13A。
至此, 1A 塔完成了一个循环, 又可进入下一个循环。 1B〜1D 吸附塔与 1A塔的循环步骤一样, 只是时间上是相互错开的, 见图 1和图 4。
现以 2a塔为例, 对照图 2和图 4, 说明本实施例第二段变压吸附装置吸 附塔在一个循环过程中的工艺步骤:
(1) 吸附 A
此时, 2a塔己完成最终升压 FR步骤, 打开程控阀 21a、 22a, 中间混合 气经管道 G21进入吸附塔 2a, 在吸附塔 2a中, 将第一段变压吸附装置处于 吸附步骤的吸附塔出口气送入第二段变压吸附装置处于吸附步骤的吸附塔, 吸附塔中的吸附剂选择性地吸附氮气, 不易吸附的氧气和氩气等组分从出口 端排出进入富氧缓冲罐或下一工段。 随着时间的推移, 吸附剂吸附的氮气总 量不断增加, 当吸附剂吸附氮气饱和时, 停止进气, 此时吸附结束, 关闭程 控阀 21a、 22a。
(2)逆向均压降压 BD '
吸附结束后, 打开程控阀 25a、 14A和 KV8, 将吸附塔 2a内的气体逆放 进入吸附塔 1A进行升压。
(3)最终升压 FR
逆向均压降压 BD'结束后, 打开程控阀 KV7和 23a,利用处于吸附步骤的 吸附塔出口气从顶端对 2a塔进行升压, 当 2a塔压力升至接近吸附压力时, 关闭程控阀 KV7和 23a。 至此, a塔完成了一个循环, 又可进入下一个循环。 2b〜2h吸附塔与 2a 塔的循环步骤一样, 只是时间上是相互错开的, 见图 2和图 4。
现以 3A塔为例, 对照图 3和图 4, 说明本实施例第三段变压吸附装置吸附 塔在一个循环过程中的工艺步骤:
(1) 吸附 A
此时, 3A塔已完成置换气升压 R'步骤, 打开程控阀 31A, 富氧气体经管 道 G31进入吸附塔 3A,将吸附塔 3A的压力升至吸附压力,此时打开程控阀 32A, 在吸附塔 3A中, 吸附剂选择性地依次吸附富氧混合气中的氧气, 未吸附的氮 气和氩气等组分从出口端流出放空或它用, 随着时间的推移, 吸附剂吸附的氧 气总量不断增加, 当吸附剂吸附上述氧气饱和时, 停止进气, 此时吸附结束, 关闭程控阀 31A、 32A, 出口气中氧气浓度控制在 5〜50% ( V)。
(2)置换 P '
吸附结束后, 打开程控阀 36A、 34A和 34C, 用压缩机出口气体经管道 G36 和 G33进入 3C塔对 3C塔进行置换气升压(简称 R' ), 当 3A吸附塔的出口混合 气中氧气浓度满足要求后, 关闭程控阀 36A、 34A和 34C。
(3)产品氧气降压 D
置换 P'结束后, 先打幵程控阀 33A、 36B、 34B和 34D, 将产品氧气从吸附 塔放出经过加压到吸附压力后去置换 3B吸附塔,置换的后期再打幵程控阀 35A, 把产品氧气放出进入下一工段。
(4)置换气升压 R'
产品氧气降压 D步骤结束后,打开程控阀 34A, 用 3C吸附塔置换 P'步骤 的出口气对吸附塔进行升压。
至此, 3A 塔完成了一个循环, 又可进入下一个循环。 3B〜3D 吸附塔与 3A塔的循环步骤一样, 只是时间上是相互错开的, 见图 3和图 4。
本实施例结果为氧气浓度大于 99. 5% (V ) , 氮气浓度大于 99. 9% (V ) , 氧气回收率大于 99. 5% ( V)。
本发明的实施例 2 :
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V ) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和^ 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
组 份 02 N, Ar c 其它 ∑ 浓度 (%) 20. 93 78. 03 0. 932 0. 03 0. 078 100 (V) 45 C
压力: 0. 3 MPa ( G )
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% ( V), 其吸附塔在一个循环周期中依次经历吸附 A、 置换 P '、 抽真空 VC、 二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压升压 2ER2、 二 段气逆向第一次均压升压 2ER1、 置换气升压 R'、 最终升压 FR变压吸附工艺 步骤; 第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 93% (V) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、逆向第一次均压降压 BID'、逆向第二次均压降压 B2D'、逆向第三次均压 降压 B3D'、 逆向均压升压 ER、 最终升压 FR变压吸附工艺步骤, 第三段变压 吸附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和 氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔 在一个循环周期中依次经历吸附 A、 产品氧气置换 P'、 产品氧气降压 D、 置 换气升压 R'变压吸附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% (V ) , 氮气浓度大于 99. 9% ( V ) , 氧气回收率大于 99. 5% (V)。
本发明的实施例 3 :
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% ( V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000013_0001
温度: 45 °C 压力: 0. 2 MPa ( G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% (V), 其吸附塔在一个循环周期中依次经历吸附 A、 置换 P'、 抽真空 VC、二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压升压 2ER2、 二 段气逆向第一次均压升压 2ER1、 置换气升压 R'、 最终升压 FR变压吸附工艺 步骤; 第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 93% (V ) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、逆向第一次均压降压 BID'、逆向第二次均压降压 B2D'、 逆向第三次均压 降压 B3D'、 逆向均压升压 ER、 最终升压 FR变压吸附工艺步骤, 第三段变压 吸附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和 氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔 在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、 产品氧气置换 P'、 产 品氧气降压 D、 置换气升压 R'、 逆向均压升压 ER变压吸附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% (V) , 氮气浓度大于 99. 9% (V ) , 氧气回收率大于 99. 5% (V)。
本发明的实施例 4:
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000014_0001
压力: 0. 2 MPa ( G )
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓
5 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% (V), 其吸附塔在一个循环周期中依次经历吸附 A、 置换 P'、 抽真空 VC、二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压升压 2ER2、 二 段气逆向第一次均压升压 2ER1、 置换气升压 R'、 最终升压 FR变压吸附工艺 ' 步骤; 第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 10 93% (V ) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 逆向第一次均 压降压 BID'、 逆向第二次均压降压 B2D'、 逆向第三次均压降压 B3D'、 最终 升压 FR变压吸附工艺步骤, 第三段变压吸附装置用于将第二段变压吸附装置 吸附塔吸附步骤流出的混合气中的氮和氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔在一个循环周期中依次经历吸 15 附 A、顺向均压降压 ED、产品氧气置换 P'、产品氧气降压 D、置换气升压 R'、 逆向均压升压 ER变压吸附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% ( V ) , 氮气浓度大于 99. 9% (V ) , 氧气回收率大于 99. 5% ( V)。
本发明的实施例 5 :
0 本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V) 左右 (即产品富氧)。 第三段变压吸
• 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
5 本实施例的空气组成如下:
Figure imgf000015_0001
45 °C
压力: 0. 3 MPa (G )
' 第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 0 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在
21〜23% (V ) , 其吸附塔在一个循环周期中依次经历吸附 A、 两端均压降压 2ED'、 置换 P'、 抽真空 VC、 二段气逆向第三次均压升压 2ER3、 二段气逆向 第二次均压升压 2ER2、二段气逆向第一次均压升压 2ER1、两端均压升压 2ER'、 置换气升压 R'、 最终升压 FR变压吸附工艺步骤; 第二段变压吸附装置处于 吸附步骤的吸附塔出口气中氧气浓度控制在 93% (V ) 左右, 其吸附塔在一个 循环周期中依次经历吸附 A、 顺向均压降压 ED、 逆向第一次均压降压 BID'、 逆向第二次均压降压 B2D'、 逆向第三次均压降压 B3D'、 逆向均压升压 ER、 最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置用于将第二段变压吸附 装置吸附塔吸附步骤流出的混合气中的氮和氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔在一个循环周期中依次经历吸 附八、产品氧气置换 P'、产品氧气降压 D、 置换气升压 R'变压吸附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% (V ) , 氮气浓度大于 99. 9% ( V ) , 氧气回收率大于 99. 5% (V)。
本发明的实施例 6 :
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V), 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000016_0001
温度: 45°C
压力: 0. 2 MPa ( G )
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% ( V ) , 其吸附塔在一个循环周期中依次经历吸附 A、 两端均压降压 2ED'、 置换 P'、 抽真空 VC;、 二段气逆向第三次均压升压 2ER3、 二段气逆向 第二次均压升压 2ER2、二段气逆向第一次均压升压 2ER1、两端均压升压 2ER'、 置换气升压 R'、 最终升压 FR变压吸附工艺步骤: 第二段变压吸附装置处于 吸附步骤的吸附塔出口气中氧气浓度控制在 93% ( V ) 左右, 其吸附塔在一个 循环周期中依次经历吸附 A、 逆向第一次均压降压 BID'、 逆向第二次均压降 压 B2D'、 逆向第三次均压降压 B3D'、 最终升压 FR变压吸附工艺步骤, 第三 段变压吸附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中 的氮和氩进一歩脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的 吸附塔在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、 产品氧气置换 P'、 产品氧气降压 D、 置换气升压 R'、 逆向均压升压 ER变压吸附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% ( V ) , 氮气浓度大于 99. 9% (V ) , 氧气回收率大于 99. 5% (V)o
本发明的实施例 7 :
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5°/。(V)以上。
本实施例的空气组成如下:
Figure imgf000017_0001
温度: 45°C
压力: 0. 2 MPa (G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% ( V ) , 其吸附塔在一个循环周期中依次经历吸附 A、 两端均压降压 2ED'、 置换 P '、 抽真空 VC、 二段气逆向第三次均压升压 2ER3、 二段气逆向 第二次均压升压 2ER2、二段气逆向第一次均压升压 2ER1、两端均压升压 2ER'、 置换气升压 R'、 最终升压 FR变压吸附工艺步骤; 第二段变压吸附装置处于 吸附温压步骤的吸附塔出口气中氧气浓度控制在 93°/。 (V)左右, 其吸附塔在一个 度力
循环周期中依次经历吸附 A、 顺向均压降压 ED、 逆向第一次均压降压 BI D'、 逆向第二次均压降压 B2D'、 逆向第三次均压降压 B3D'、 逆向均压升压 ER、 最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置用于将第二段变压吸附 装置吸附塔吸附步骤流出的混合气中的氮和氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔在一个循环周期中依次经历吸 附八、顺向均压降压 ED、产品氧气置换 P'、产品氧气降压 D、置换气升压 R'、 逆向均压升压 ER变压吸附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% ( V ) , 氮气浓度大于 99. 9% (V ) , 氧气回收率大于 99. 5% (V)。
本发明的实施例 8 :
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23Q/。 (V) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000018_0001
45。C
0. 1 MPa (G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% (V), 其吸附塔在一个循环周期中依次经历吸附 A、 置换 P'、 抽真空 VC、 二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压升压 2ER2、 二 段气逆向第一次均压升压 2ER 置换气升压 R'、 最终升压 FR变压吸附工艺 步骤; 第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 93% (V ) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、逆向第一次均压降压 BID'、逆向第二次均压降压 B2D'、逆向第三次均压 降压 B3D'、 逆向均压升压 ER、 最终升压 FR变压吸附工艺步骤, 第三段变压 吸附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和 氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔 在一个循环周期中依次经历吸附 A、 产品氧气置换 P'、 产品氧气降压 D、 抽 真空 VC:、 置换气升压 R'变压吸附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% ( V ) , 氮气浓度大于 99. 9% ( V ) , 氧气回收率大于 99. 5% (V ) c
本发明的实施例 9 :
本例的.原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% ( V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附歩骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000019_0001
温度: 45°C
压力: 0. 1 MPa (G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% (V ), 其吸附塔在一个循环周期中依次经历吸附 A、 置换 P'、 抽真空 VC、 二段气逆向均压升压 2ER、 置换气升压 R'、 最终升压 FR变压吸附工艺步 骤: 第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 70〜95% (V ) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 逆向均压 降压 BD'、 最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置用于将第二 段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩进一步脱除, 并把 氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔在一个循环周期中依 次经历吸附 A、 产品氧气置换 P'、 产品氧气降压 D、 抽真空 VC、 置换气升压 R'变压吸附工艺步骤。 本实施例结果为氧气浓度大于 99. 5% (V ) , 氮气浓度大于 99. 9% (V ) , 氧气回收率大于 99. 5% (V)。
本发明的实施例 10:
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% ( V ) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000020_0001
温度: 45 °C
压力: 0. 2 MPa (G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% ( V ), 其吸附塔在一个循环周期中依次经历吸附 A、 置换 P '、 抽真空 VC、 二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压升压 2ER2、 二 段气逆向第一次均压升压 2ER1、 置换气升压 R'、 最终升压 FR变压吸附工艺 步骤; 第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 93% (V) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、逆向第一次均压降压 BID'、逆向第二次均压降压 B2D'、逆向第三次均压 降压 B3D'、 逆向均压升压 ER、 最终升压 FR变压吸附工艺步骤, 第三段变压 吸附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和 氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔 在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、 产品氧气置换 P'、 产 品氧气降压 D、 抽真空 VC、 置换气升压 R'、 逆向均压升压 ER变压吸附工艺 歩骤。
本实施例结果为氧气浓度大于 99. 5% ( V ) , 氮气浓度大于 99. 9% ( V ) ' 氧气回收率大于 99. 5% (V ) o 本发明的实施例 11 :
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V ), 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000021_0001
45°C
压力: 0. 2 MPa ( G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% (V ) , 其吸附塔在一个循环周期中依次经历吸附 A、 两端均压降压 2ED'、 置换 P'、 抽真空 VC、 二段气逆向第三次均压升压 2ER3、 二段气逆向 第二次均压升压 2ER2、二段气逆向第一次均压升压 2ER1、两端均压升压 2ER'、 置换气升压 R '、 最终升压 FR变压吸附工艺步骤; 第二段变压吸附装置处于 吸附步骤的吸附塔出口气中氧气浓度控制在 93% ( V ) 左右, 其吸附塔在一个 循环周期中依次经历吸附 A、 逆向第一次均压降压 BID'、 逆向第二次均压降 压 B2D'、 逆向第三次均压降压 B3D'、 最终升压 FR变压吸附工艺步骤, 第三 段变压吸附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中 的氮和氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的 吸附塔在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、 产品氧气置换 P'、 产品氧气降压 D、 抽真空 VC、 置换气升压 R'、 逆向均压升压 ER变压吸 附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% (V ) , 氮气浓度大于 99. 9% ( V ) , 氧气回收率大于 99. 5% ( V)。
本发明的实施例 12 :
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000022_0001
温度: 45°C
压力: ◦. 3 MPa (G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23/。 ( V ) , 其吸附塔在一个循环周期中依次经历吸附 A、 两端均压降压 2ED'、 逆向降压 BD、 置换 P'、 抽真空 VC、 二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压升压 2ER2、二段气逆向第一次均压升压 2ER1、两端均 压升压 2ER'、 置换气升压 R'、 最终升压 FR变压吸附工艺步骤; 第二段变压 吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 93% ( V )左右, 其 吸附塔在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、 逆向第一次均 压降压 BID'、 逆向第二次均压降压 B2D'、 逆向第三次均压降压 B3D'、 逆向 均压升压 ER、 最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置用于将 第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔在一个循环周期 中依次经历吸附4、 产品氧气置换 P'、 产品氧气降压 D、 置换气升压 R'变压 吸附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% (V ) , 氮气浓度大于 99. 9% ( V ) , 氧气回收率大于 99. 5% (V)。
本发明的实施例 13 :
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% ( V ) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% (V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000023_0001
压力: 0. 5 MPa ( G )
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在
21〜23% (V), 其吸附塔在一个循环周期中依次经历吸附 A、 置换 P'、 抽真空 VC、二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压升压 2ER2、 二 段气逆向第一次均压升压 2ER1、 置换气升压 R'、 最终升压 FR变压吸附工艺 步骤; 第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 93% (V ) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、逆向第一次均压降压 BID'、逆向第二次均压降压 B2D'、逆向第三次均压 降压 B3D'、 逆向均压升压 ER、 最终升压 FR变压吸附工艺步骤, 第三段变压 吸附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和 氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔 在一个循环周期中依次经历吸附 A、 产品氧气置换 P'、 产品氧气降压 D、 置 换气升压 R'变压吸附工艺步骤,第二段变压吸附装置吸附塔逆向第一次均压 降压 BID'的气体放入缓冲罐 VI进行均压,再用缓冲罐 VI 的气体与第一段变 压吸附装置吸附塔逆向第一次均压升压 2ER1的吸附塔进行压力平衡;第二段 变压吸附装置吸附塔逆向第二次均压降压 B2D'的气体放入缓冲罐 V2进行均 压,再用缓冲罐 V2的气体与第一段变压吸附装置吸附塔逆向第二次均压升压 2ER2的吸附塔进行压力平衡;第二段变压吸附装置吸附塔逆向第三次均压降 压 B3D'的气体放入缓冲罐 V3进行均压,再用缓冲罐 V3 的气体与第一段变压 吸附装置吸附塔逆向第三次均压升压 2ER3的吸附塔进行压力平衡。
本实施例结果为氧气浓度大于 99. 5% ( V ) , 氮气浓度大于 99. 9°/。 ( V ) , 氧气回收率大于 99. 5% (V)。 本发明的实施例 14:
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V ) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% ( V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氣 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000024_0001
温度: 45°C
压力: 0. 3 MPa (G )
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附歩骤的吸附塔出口气中氧气浓度控制在 21〜23% (V), 其吸附塔在一个循环周期中依次经历吸附 A、 置换 P'、 抽真空 VC、二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压升压 2ER2、 二 段气逆向第一次均压升压 2ER1、 置换气升压 R'、 最终升压 FR变压吸附工艺 步骤; 第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 93% (V ) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 逆向第一次均 压降压 BID'、 逆向第二次均压降压 B2D'、 逆向第三次均压降压 B3D'、 最终 升压 FR变压吸附工艺步骤, 第三段变压吸附装置用于将第二段变压吸附装置 吸附塔吸附步骤流出的混合气中的氮和氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔在一个循环周期中依次经历吸 附八、产品氧气置换 P'、产品氧气降压 D、置换气升压 R'变压吸附工艺步骤, 第二段变压吸附装置吸附塔逆向第一次均压降压 BID'的气体放入缓冲罐 V I 进行均压,再用缓冲罐 VI的气体与第一段变压吸附装置吸附塔逆向第、- 次均 压升压 2ER1的吸附塔进行压力平衡;第二段变压吸附装置吸附塔逆向第二次 均压降压 B2D'的气体放入缓冲罐 V2进行均压,再用缓冲罐 V2 的气体与第一 段变压吸附装置吸附塔逆向第二次均压升压 2ER2的吸附塔进行压力平衡;第 二段变压吸附装置吸附塔逆向第三次均压降压 B3D'的气体放入缓冲罐 V3进 行均压,再用缓冲罐 V3的气体与第一段变压吸附装置吸附塔逆向第三次均压 升压 2ER3的吸附塔进行压力平衡。
本实施例结果为氧气浓度大于 99. 5% (V ) , 氮气浓度大于 99. 9% ( V ) , 氧气回收率大于 99. 5% ( V)。
本发明的实施例 15 :
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% ( V ), 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% ( V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000025_0001
温度: 45。C
压力: 0. 3 MPa (G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% ( V ) , 其吸附塔在一个循环周期中依次经历吸附 A、 两端均压降压 2ED'、 置换 P'、 逆向降压 BD、 二段气逆向第三次均压升压 2ER3、 二段气逆 向第二次均压升压 2ER2、 二段气逆向第一次均压升压 2ER1、 两端均压升压 2ER'、 置换气升压 R'、 最终升压 FR变压吸附工艺步骤; 第二段变压吸附装 置处于吸附步骤的吸附塔出口气中氧气浓度控制在 93% ( V ) 左右, 其吸附塔 在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、 逆向第一次均压降压 B1D'、逆向第二次均压降压 B2D'、逆向第三次均压降压 B3D'、逆向均压升压 ER、最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置用于将第二段变压 吸附装置吸附塔吸附步骤流出的混合气中的氮和氩进一步脱除, 并把氧提高 到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔在一个循环周期中依次经历 吸附 A、 产品氧气置换 P'、 产品氧气降压 D、 置换气升压 R'变压吸附工艺步 骤。 本实施例结果为氧气浓度大于 99. 5% (V) , 氮气浓度大于 99. 9% ( V ) , 氧气回收率大于 99. 5% (V)。
本发明的实施例 16:
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V ) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% ( V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000026_0001
温度: 45 °C
压力: 0. 1 MPa ( G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% ( V ), 其吸附塔在一个循环周期中依次经历吸附 A、 两端均压降压 2ED'、抽真空 VC:、 二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压 升压 2ER2、 二段气逆向第一次均压升压 2ER1、 两端均压升压 2ER'、 最终升 压 FR变压吸附工艺步骤;第二段变压吸附装置处于吸附步骤的吸附塔出口气 中氧气浓度控制在 93% ( V ) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 逆向第一次均压降压 BID'、 逆向第二次均压降压 B2D'、 逆向第三次均压 降压 B3D'、 最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置用于将第 二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩进一步脱除, 并 把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔在一个循环周期中 依次经历吸附 A、 产品氧气置换 P'、 产品氧气降压 D、 置换气升压 R'变压吸 附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% (V ) , 氮气浓度大于 99. 9% (V ) , 氧气回收率大于 99. 5% (V)。
本发明的实施例 17 : 本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% ( V ) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% ( V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下:
Figure imgf000027_0001
温度: 45Ό
压力: 0· 3 MPa ( G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% (V ) , 其吸附塔在一个循环周期中依次经历吸附 A、 置换 P'、 抽真空 VC、二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压升压 2ER2、 二 段气逆向第一次均压升压 2ER1、 置换气升压 R'、 最终升压 FR变压吸附工艺 步骤; 第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 93% (V ) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 逆向第一次均 压降压 BID'、 逆向第二次均压降压 B2D'、 逆向第三次均压降压 B3D'、 最终 升压 FR变压吸附工艺步骤, 第三段变压吸附装置用于将第二段变压吸附装置 吸附塔吸附步骤流出的混合气中的氮和氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔在一个循环周期中依次经历吸 附 A、 顺向均压降压 ED、 产品氧气降压 D、 逆向均压升压 ER变压吸附工艺步 骤。
本实施例结果为氧气浓度大于 99. 5% (V ) , 氮气浓度大于 99. 9% (V ) , 氧气回收率大于 99. 5% (V)。
本发明的实施例 18:
本例的原料气为空气。 第一段变压吸附装置处于吸附步骤的吸附塔出口 气中氧气浓度控制在 21〜23% (V ) , 第二段变压吸附装置处于吸附步骤的吸 附塔出口气中氧气浓度控制在 93% ( V ) 左右 (即产品富氧)。 第三段变压吸 附装置用于将第二段变压吸附装置吸附塔吸附步骤流出的混合气中的氮和氩 进一步脱除, 并把氧提高到 99. 5% (V)以上。
本实施例的空气组成如下-
Figure imgf000028_0001
温度: 45Ό
压力: 0. 5 MPa (G)
第一段变压吸附装置吸附塔内由下到上装填的吸附剂依次为活性氧化铝 及分子筛,第二段变压吸附装置吸附塔内装填的吸附剂为分子筛, 第三段变 压吸附装置吸附塔内装填的吸附剂为碳分子筛或氧吸附平衡吸附剂。 本实施 例将上述三段变压吸附装置串联操作, 第一段变压吸附装置脱除空气中的气 态水、 二氧化碳及部分氮气, 第二段变压吸附装置用于将第一段变压吸附装 置吸附塔吸附步骤流出的中间气中的氮进一步脱除, 并把氧提高至所需的浓 度。 第一段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 21〜23% (V ), 其吸附塔在一个循环周期中依次经历吸附 A、 置换 P'、 抽真空 VC、 二段气逆向第三次均压升压 2ER3、 二段气逆向第二次均压升压 2ER2、 二 段气逆向第一次均压升压 2ER1、 置换气升压 R'、 最终升压 FR变压吸附工艺 步骤; 第二段变压吸附装置处于吸附步骤的吸附塔出口气中氧气浓度控制在 93% (V ) 左右, 其吸附塔在一个循环周期中依次经历吸附 A、 逆向第一次均 压降压 BID'、 逆向第二次均压降压 B2D'、 逆向第三次均压降压 B3D'、 最终 升压 FR变压吸附工艺步骤, 第三段变压吸附装置用于将第二段变压吸附装置 吸附塔吸附步骤流出的混合气中的氮和氩进一步脱除, 并把氧提高到 99. 5% (V)以上, 第三段变压吸附装置的吸附塔在一个循环周期中依次经历吸 附八、 顺向均压降压 ED、 抽真空 VC、 逆向均压升压 ER变压吸附工艺步骤。
本实施例结果为氧气浓度大于 99. 5% (V ) , 氮气浓度大于 99. 9% ( V ) , 氧气回收率大于 99. 5% (V)。 工业应用性
本发明可广泛应用于化工、 石化、 制药、 建材、 环保等工业领域。

Claims

权 利 要 求
1、 采用三段变压吸附装置生产氧气的方法, 其特征在于此方法用于从空 气中分离氮气和氧气,产品可以是氧气,也可以是氮气,还可以同时是氧 气和氮气, 此方法采用三段变压吸附装置串联操作,第一段变压吸附装 置用于脱除二氧化碳、水和部分氮气并将氮气提浓, 第二段变压吸附装 置用于将第一段变压吸附装置吸附塔吸附歩骤流出的中间气中的氮进 一步脱除, 并把氧提高至所需的浓度,第三段变压吸附装置用于将第二 段变压吸附装置吸附塔吸附步骤流出的富氧混合气的氮气和氩气进一 步脱除, 并把氧提高至 95V%以上, 第一段变压吸附装置的吸附塔在一 个循环周期中依次经历吸附 A、 置换 P '、 抽真空 V (:、 二段气逆向均压 升压 2ER、 置换气升压 R'、 最终升压 FR变压吸附工艺步骤; 第二段变 压吸附装置的吸附塔在一个循环周期中依次经历吸附 A、逆向均压降压 BD'、最终升压 FR变压吸附工艺步骤,第三段变压吸附装置的吸附塔在 一个循环周期中依次经历吸附八、 产品氧气置换 P '、 产品氧气降压 D、 置换气升压 R'变压吸附工艺步骤。
2、 根据权利要求 1 所述的采用三段变压吸附装置生产氧气的方法, 其特 征在于在第二段变压吸附装置吸附塔在吸附 A 工艺步骤之后增加顺向 均压降压 ED工艺步骤, 同时在逆向均压降压 BD'工艺步骤完成后增加 逆向均压升压 ER工艺步骤,升压 ER工艺步骤的混合气来自降压 ED工艺 步骤和(或) 在第三段变压吸附装置吸附塔在吸附 A工艺步骤之后增加 顺向均压降压 ED工艺步骤, 同时在置换气升压 R'工艺步骤完成后增加 逆向均压升压 ER工艺步骤,升压 ER工艺步骤的混合气来自降压 ED工艺 步骤。
3、 根据权利要求 1 或 2所述的采用三段变压吸附装置生产氧气的方法, 其特征在于第一段变压吸附装置吸附塔在吸附 A 工艺步骤之后增加两 端均压降压 2ED'工艺步骤, 同时在二段气逆向均压升压 2ER工艺步骤 完成后增加两端均压升压 2ER'工艺步骤, 两端均压升压 2ER '工艺步骤 的混合气来自均压降压 2ED'工艺步骤。
4、 根据权利要求 1 或 2所述的采用三段变压吸附装置生产氧气的方法, 其特征在于第三段变压吸附装置吸附塔在产品氧气降压 D 工艺步骤之 后增加抽真空 VC工艺步骤。
5、 根据权利要求 3 所述的采用三段变压吸附装置生产氧气的方法, 其特 征在于第三段变压吸附装置吸附塔在产品氧气降压 D 工艺步骤之后增 加抽真空 VC工艺步骤。 、 根据权利要求 3 所述的采用三段变压吸附装置生产氧气的方法, 其特 征在于第一段变压吸附装置吸附塔在置换 P'工艺步骤之后增加逆向降 压 BD工艺步骤。
、 根据权利要求 1 或 2所述的采用三段变压吸附装置牛产 t气的方法. 其特征在于第二段变压吸附装置吸附塔逆向均压降压 BD'工艺步骤放 出的混合气进入缓冲罐 V,直到压力平衡为止,同时第一段变压吸附装 置吸附塔在进行二段气逆向均压升压 2ER工艺步骤时,吸附塔与缓冲罐 V连通, 直到压力平衡为止。
、 根据权利要求 3 所述的采用三段变压吸附装置生产氧气的方法, 其特 征在于第二段变压吸附装置吸附塔逆向均压降压 BD'工艺步骤放出的 混合气进入缓冲罐 V,直到压力平衡为止,同时第一段变压吸附装置吸 附塔在进行二段气逆向均压升压 2ER工艺步骤时,吸附塔与缓冲罐 V连 通, 直到压力平衡为止。
、 根据权利要求 4 所述的采用三段变压'吸附装置生产氧气的方法, 其特 征在于第二段变压吸附装置吸附塔逆向均压降压 BD'工艺步骤放出的 混合气进入缓冲罐 V,直到压力平衡为止,同时第一段变压吸附装置吸 附塔在进行二段气逆向均压升压 2ER工艺步骤时,吸附塔与缓冲罐 V连 通, 直到压力平衡为止。
10、 根据权利要求 1 或 2 所述的采用三段变压吸附装置生产氧气的方 法,其特征在于第一段变压吸附装置吸附塔吸附步骤出口气中氧气的平 均浓度为 21〜80 V %。
11、 根据权利要求 3所述的采用三段变压吸附装置生产氧气的方法, 其 特征在于第一段变压吸附装置吸附塔吸附步骤出口气中氧气的平均浓 度为 21〜80 V %。
12、 根据权利要求 4所述的采用三段变压吸附装置生产氧气的方法, 其 特征在于第一段变压吸附装置吸附塔吸附步骤出口气中氧气的平均浓 度为 21〜80 V %。
13、 根据权利要求 10 所述的采用三段变压吸附装置生产氧气的方法, 其特征在于第一段变压吸附装置吸附塔吸附步骤出口气中氧气的平均 浓度为 21〜25V%。
14、 根据权利要求 11 所述的采用三段变压吸附装置生产氧气的方法, 其特征在于第一段变压吸附装置吸附塔吸附步骤出口气中氧气的平均 浓度为 21〜25V%。
15、 根据权利要求 12 所述的采用三段变压吸附装置生产氧气的方法, 其特征在于第一段变压吸附装置吸附塔吸附步骤出口气中氧气的平均 浓度为 21〜25V%。
16、 根据权利要求 1 或 2 所述的采用三段变压吸附装置生产氧气的方 法,其特征在于三段变压吸附装置吸附步骤 A的压力为 0. 001〜0. 6MPa 表压或第一和第二段变压吸附装置吸附步骤 的压力为 0. 00】 〜 0. 05MPa表压,第三段变压吸附装置吸附步骤 A 的压力为 0. l〜0. 6MPa 表压。
17、 根据权利要求 3所述的采用三段变压吸附装置生产氧气的方法, 其 特征在于三段变压吸附装置吸附步骤 A的压力为 0. 001〜0. 6MPa表压或 第一和第二段变压吸附装置吸附步骤 A的压力为 0. 001〜0. 05MPa表压, 第三段变压吸附装置吸附步骤 A的压力为 0. 1〜0. 6MPa表压。
18、 根据权利要求 4所述的采用三段变压吸附装置生产氧气的方法, 其 特征在于三段变压吸附装置吸附步骤 A的压力为 0. 001〜0. 6MPa表压或 第一和第二段变压吸附装置吸附步骤 A的压力为 0. 001〜0. 05MPa表压, 第三段变压吸附装置吸附步骤 A的压力为 0. 1〜0. 6MPa表压。
19、 根据权利要求 1 或 2 所述的采用三段变压吸附装置生产氧气的方 法,其特征在于第一段变压吸附装置吸附塔内由下到上装填的吸附剂为 活性氧化铝及分子筛;第二段变压吸附装置吸附塔内装填的吸附剂只为 分子筛;第三段变压吸附装置吸附塔内装填的吸附剂为氧吸附平衡吸附 剂或动力学选择吸附氧的吸附剂。
20、 根据权利要求 3所述的采用三段变压吸附装置生产氧气的方法, 其 特征在于第一段变压吸附装置吸附塔内由下到上装填的吸附剂为活性 氧化铝及分子筛;第二段变压吸附装置吸附塔内装填的吸附剂只为分子 筛;第三段变压吸附装置吸附塔内装填的吸附剂为氧吸附平衡吸附剂或 动力学选择吸附氧的吸附剂。
21、 根据权利要求 4所述的采用三段变压吸附装置生产氧气的方法, 其 特征在于第一段变压吸附装置吸附塔内由下到上装填的吸附剂为活性 氧化铝及分子筛;第二段变压吸附装置吸附塔内装填的吸附剂只为分子 筛;第三段变压吸附装置吸附塔内装填的吸附剂为氧吸附平衡吸附剂或 动力学选择吸附氧的吸附剂。
22、 根据权利要求 1 或 2 所述的采用三段变压吸附装置生产氧气的方 法,其特征在于第二段变压吸附装置吸附塔逆向均压降压 ED '和第一段 变压吸附装置吸附塔二段气逆向均压升压 2ER的次数大于或等于 1。
23、 根据权利要求 3所述的采用三段变压吸附装置生产氧气的方法, 其 特征在于第二段变压吸附装置吸附塔逆向均压降压 ED '和第一段变压 吸附装置吸附塔二段气逆向均压升压 2ER的次数大于或等于 1。 24、 ' 根据权利要求 4所述的采用三段变压吸附装置生产氧气的方法, 其 特征在于第二段变压吸附装置吸附塔逆向均压降压 ED'和第一段变压 吸附装置吸附塔二段气逆向均压升压 2ER的次数大于或等于 1。
25、 根据权利要求 18 所述的采用三段变压吸附装置生产氧气的方法, 其特征在于第二段变压吸附装置吸附塔逆向均压降压 ED'和第一段变 压吸附装置吸附塔二段气逆向均压升压 2ER的次数为 3〜7次。
26、 根据权利要求 19 所述的采用三段变压吸附装置生产氧气的方法, 其特征在于第二段变压吸附装置吸附塔逆向均压降压 ED '和第一段变 压吸附装置吸附塔二段气逆向均压升压 2ER的次数为 3〜7次。
27、 根据权利要求 20 所述的采用三段变压吸附装置生产氧气的方法, 其特征在于第二段变压吸附装置吸附塔逆向均压降压 ED '和第一段变 压吸附装置吸附塔二段气逆向均压升压 2ER的次数为 3〜7次。
28、 采用三段变压吸附装置生产氧气的方法, 其特征在于此方法用于从 空气中分离氮气和氧气,产品可以是氧气,也可以是氮气,还可以同时是 氧气和氮气,此方法采用三段变压吸附装置串联操作,第一段变压吸附 装置用于脱除二氧化碳、水和部分氮气并将氮气提浓,第二段变压吸附 装置用于将第一段变压吸附装置吸附塔吸附步骤流出的中间气中的氮 进一步脱除, 并把氧提高至所需的浓度,第三段变压吸附装置用于将第 二段变压吸附装置吸附塔吸附步骤流出的富氧混合气的氮气和氩气进 一步脱除, 并把氧提高至 95V%以上, 第一段变压吸附装置的吸附塔在 一个循环周期中依次经历吸附八、 两端均压降压 2ED'、 置换 P'、 逆向 降压 BD、二段气逆向均压升压 2ER、两端均压升压 2ER'、置换气升压 R'、 最终升压 FR变压吸附工艺步骤; 第二段变压吸附装置吸附塔在一个循 环周期中依次经历吸附 、 顺向均压降压 ED、 逆向均压降压 BD'、 逆向 均压升压 ER、 最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置的 吸附塔在一个循环周期中依次经历吸附 A、产品氧气置换 P'、产品氧气 降压 D、 置换气升压 R'变压吸附工艺步骤。
29、 根据权利要求 28 所述的采用三段变压吸附装置生产氧气的方法, 其特征在于三段变压吸附装置吸附步骤 A的压力为 0. 2〜0. 6MPa表压。
30、 釆用三段变压吸附装置生产氧气的方法, 其特征在于此方法用于从 空气中分离氮气和氧气,产品可以是氧气,也可以是氮气,还可以同时是 氧气和氮气,此方法采用三段变压吸附装置串联操作,第一段变压吸附 装置用于脱除二氧化碳、水和部分氮气并将氮气提浓,第二段变压吸附 装置用于将第一段变压吸附装置吸附塔吸附步骤流出的中间气中的氮 进一步脱除, 并把氧提高至所需的浓度,第三段变压吸附装置用于将第 二段变压吸附装置吸附塔吸附步骤流出的富氧混合气的氮气和氩气进 一步脱除, 并把氧提高至 95V%以上, 第一段变压吸附装置的吸附塔在 一个循环周期中依次经历吸附 、 两端均压降压 2ED'、 抽真空 VC、 二 段气逆向均压升压 2ER、 两端均压升压 2ER '、 最终升压 FR变压吸附工 艺步骤;第二段变压吸附装置的吸附塔在一个循环周期中依次经历吸附
A、 逆向均压降压 BD '、 最终升压 FR变压吸附工艺步骤, 第三段变压吸, 附装置的吸附塔在一个循环周期中依次经历吸附 A、 产品氧气置换 P '、 产品氧气降压 D、 置换气升压 R'变压吸附工艺步骤。
31、 根据权利要求 30 所述的采用三段变压吸附装置生产氧气的方法, 其特征在于在第二段变压吸附装置吸附塔在吸附 A 工艺步骤之后增加 顺向均压降压 ED工艺步骤, 同时在逆向均压降压 BD'工艺步骤完成后 增加逆向升压 ER工艺步骤,升压 ER工艺步骤的混合气来自降压 ED工艺 步骤。
32、 根据权利要求 30或 31所述的采用三段变压吸附装置生产氧气的方 法, 其特征在于第一段变压吸附装置吸附塔在两端均压降压 2ED'工艺 步骤之后增加逆向降压 BD工艺歩骤。
33、 根据权利要求 30或 31所述的采用三段变压吸附装置生产氧气的方 法, 其特征在于第二段变压吸附装置吸附塔逆向均压降压 BD'工艺步骤 放出的混合气进入缓冲罐 V,直到压力平衡为止,同时第一段变压吸附 装置吸附塔在进行二段气逆向均压升压 2ER工艺步骤时,吸附塔与缓冲 罐 V连通, 直到压力平衡为止。
34、 根据权利要求 30或 31所述的采用三段变压吸附装置生产氧气的方 法, 其特征在于两段变压吸附装置吸附步骤 A的压力为 0. 005〜0. 6MPa 表压。
35、 采用三段变压吸附装置生产氧气的方法, 其特征在于此方法用于从 空气中分离氮气和氧气,产品可以是氧气,也可以是氮气,还可以同时是 氧气和氮气,此方法采用三段变压吸附装置串联操作, 第一段变压吸附 装置用于脱除二氧化碳、水和部分氮气并将氮气提浓,第二段变压吸附 装置用于将第一段变压吸附装置吸附塔吸附步骤流出的中间气中的氮 进一步脱除, 并把氧提高至所需的浓度,第三段变压吸附装置用于将第 二段变压吸附装置吸附塔吸附步骤流出的富氧混合气的氮气和氩气进 一步脱除, 并把氧提高至 95V%以上, 第一段变压吸附装置的吸附塔在 一个循环周期中依次经历吸附八、 置换 P'、 抽真空 VC、 二段气逆向均 压升压 2ER、 置换气升压 R'、 最终升压 FR变压吸附工艺步骤; 第二段 变压吸附装置的吸附塔在一个循环周期中依次经历吸附 A、逆向均压降 压 BD'、 最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置的吸附 塔在一个循环周期中依次经历吸附 A、顺向均压降压 ED、产品氧气降压 D、 逆向均压升压 ER变压吸附工艺步骤。
、 根据权利要求 35 所述的采用三段变压吸附装置生产氧气的方法, 其特征在于第三段变压吸附装置吸附塔在产品氧气降压 D 工艺步骤之 后增加抽真空 VC工艺步骤。
、 根据权利要求 35或 36所述的采用三段变压吸附装置生产氧气的方 法,其特征在于第一段变压吸附装置吸附塔内由下到上装填的吸附剂为 活性氧化铝及分子筛;第二段变压吸附装置吸附塔内装填的吸附剂只为 分子筛;第三段变压吸附装置吸附塔内装填的吸附剂为氧吸附平衡吸附 剂或动力学选择吸附氧的吸附剂。
、 采用三段变压吸附装置生产氧气的方法, 其特征在于此方法用于从 空气中分离氮气和氧气,产品可以是氧气,也可以是氮气,还可以同时是 氧气和氮气,此方法釆用三段变压吸附装置串联操作, 第一段变压吸附 装置用于脱除二氧化碳、水和部分氮气并将氮气提浓, 第二段变压吸附 装置用于将第一段变压吸附装置吸附塔吸附步骤流出的中间气中的氮 进一步脱除, 并把氧提高至所需的浓度, 第三段变压吸附装置用于将第 二段变压吸附装置吸附塔吸附步骤流出的富氧混合气的氮气和氩气进 一步脱除, 并把氧提高至 95W。以上, 第一段变压吸附装置的吸附塔在 一个循环周期中依次经历吸附 A、 置换 P '、 抽真空 VC、 二段气逆向均 压升压 2ER、 置换气升压 R'、 最终升压 FR变压吸附工艺步骤; 第二段 变压吸附装置的吸附塔在一个循环周期中依次经历吸附 A、逆向均压降 压 BD'、 最终升压 FR变压吸附工艺步骤, 第三段变压吸附装置的吸附 塔在一个循环周期中依次经历吸附 A、 顺向均压降压 ED、 抽真空 VC、 逆向均压升压 ER变压吸附工艺步骤。
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CN108434932A (zh) * 2018-04-11 2018-08-24 珠海市思卡净化技术有限公司 一种内进外出式压缩空气干燥过滤筒
CN108434932B (zh) * 2018-04-11 2024-04-30 珠海市思卡净化技术有限公司 一种内进外出式压缩空气干燥过滤筒

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US7645325B2 (en) 2010-01-12
US20070227354A1 (en) 2007-10-04
EP1772183B1 (en) 2013-03-27
CN1250322C (zh) 2006-04-12
ES2411663T3 (es) 2013-07-08
JP2008501613A (ja) 2008-01-24
AU2005251849A1 (en) 2005-12-22
EA200700014A1 (ru) 2007-12-28
AU2005251849B2 (en) 2011-03-10
EP1772183A4 (en) 2009-09-16
CN1583222A (zh) 2005-02-23
EA011196B1 (ru) 2009-02-27
EP1772183A1 (en) 2007-04-11
JP5184885B2 (ja) 2013-04-17

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