EP3160619A1 - Procédé et dispositif de traitement d'air avec adsorption de dioxyde de carbone et enrichissement en oxygène - Google Patents

Procédé et dispositif de traitement d'air avec adsorption de dioxyde de carbone et enrichissement en oxygène

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Publication number
EP3160619A1
EP3160619A1 EP15731270.3A EP15731270A EP3160619A1 EP 3160619 A1 EP3160619 A1 EP 3160619A1 EP 15731270 A EP15731270 A EP 15731270A EP 3160619 A1 EP3160619 A1 EP 3160619A1
Authority
EP
European Patent Office
Prior art keywords
carbon dioxide
dioxide adsorption
air
adsorption device
regeneration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP15731270.3A
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German (de)
English (en)
Inventor
August KRINNER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Krinner Drucklufttechnik GmbH
Original Assignee
Krinner Drucklufttechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krinner Drucklufttechnik GmbH filed Critical Krinner Drucklufttechnik GmbH
Publication of EP3160619A1 publication Critical patent/EP3160619A1/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
    • A61M16/101—Preparation of respiratory gases or vapours with O2 features or with parameter measurement using an oxygen concentrator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/10—Single element gases other than halogens
    • B01D2257/102—Nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40003—Methods relating to valve switching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
    • B01D2259/40043—Purging
    • B01D2259/4005—Nature of purge gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
    • B01D2259/40043—Purging
    • B01D2259/4005—Nature of purge gas
    • B01D2259/40052—Recycled product or process gas
    • B01D2259/40054—Recycled product or process gas treated before its reuse
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/402—Further details for adsorption processes and devices using two beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4533—Gas separation or purification devices adapted for specific applications for medical purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4541—Gas separation or purification devices adapted for specific applications for portable use, e.g. gas masks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

Definitions

  • the present invention relates to an air treatment method and an air treatment apparatus.
  • oxygen-enriched breathing air also referred to as NITROX
  • NITROX oxygen-enriched breathing air
  • the benefits of using oxygen-enriched breathing air during dives are well known.
  • Recycled breathing air can also be used in hospitals for medical treatment.
  • Critical in the generation of treated, in particular oxygen-enriched breathing air is the carbon dioxide content in the gas produced.
  • the use of air with reduced carbon dioxide content is advantageous, such as in applications where compressed air is used for cleaning purposes.
  • the air can be generated by mixing certain gases with desired proportions.
  • this type of production is complicated, since the respective gases must be provided for mixing in a pure state and must be precisely metered.
  • oxygen-enriched breathing air it is also known to reduce the amount of nitrogen in the ambient air to thereby obtain a gas having an increased oxygen content.
  • Air conditioning method comprising the steps of: - providing compressed air;
  • At least partially regeneration of the carbon dioxide adsorption device with at least a portion of the separated nitrogen At least partially regeneration of the carbon dioxide adsorption device with at least a portion of the separated nitrogen.
  • the carbon dioxide content of the compressed air is reduced before it is introduced into the separation device.
  • the compressed air may for example be provided by a compressed air system.
  • compressed air can also be used by a compressor.
  • the air can thus be introduced under pressure into the carbon dioxide adsorption. It has proven particularly advantageous to introduce the air under pressure in a range from 7 to 13 bar, preferably 7-10 bar, into the carbon dioxide adsorption device. However, these ranges are not meant to be limiting.
  • the carbon dioxide adsorption device can be operated to adsorb carbon dioxide under any other suitable overpressure.
  • the carbon dioxide adsorption device works most efficiently under overpressure. This results in a particularly efficient reduction of the carbon dioxide content in the air.
  • the resulting gas mixture is then at least partially fed to the separator.
  • the membrane of the separator can operate more efficiently because there is little or no carbon dioxide in the feed gas. This is because oxygen and carbon dioxide molecules take the same route when separated in the membrane because they have similar properties.
  • At least part of the separated nitrogen is also used for at least partially regenerating the carbon dioxide adsorption device.
  • This has the advantage that the separated nitrogen can be used at least partially. This further increases the efficiency of the overall system.
  • the process should also be applicable to carbon dioxide adsorption devices which have a plurality of carbon dioxide adsorption units which can adsorb carbon dioxide singly or in groups and be regenerated individually or in groups.
  • An at least partial regeneration should be understood against this background in that at least a part or an element of the carbon dioxide adsorption device is regenerated. If, in the following, therefore, a regeneration of the carbon dioxide adsorption device is mentioned, it is to be understood that this is regenerated at least in sections.
  • a regeneration of the carbon dioxide adsorption device it is determined in a further step whether a regeneration of the carbon dioxide adsorption device is required. At this time, it is determined that the regeneration of the carbon dioxide adsorption device is required when it is determined that its adsorption performance has deteriorated. Such a determination can be made, for example, at predetermined time intervals. Furthermore, such determination can also be carried out continuously. It is also possible to link the step of determining to certain events, such as switching on a device for carrying out the method. A deterioration of the adsorption performance is to be understood as a reduction of the adsorption under constant conditions.
  • the operation time of the carbon dioxide adsorption device can be monitored. This means that, for example, a counter can be reset after each regeneration of the carbon dioxide adsorption device.
  • the predetermined operation time may be set depending on the carbon dioxide adsorption device. Namely, depending on the type of the carbon dioxide adsorption device, the carbon dioxide adsorption device is capable of adsorbing different amounts of carbon dioxide. Conveniently, the predetermined operating time is determined so that a predetermined adsorption capacity is not exceeded.
  • the predetermined operating time can be selected, for example, such that it is set half as long as the determined time.
  • the regeneration thus takes place according to this embodiment as a function of the operating time of the carbon dioxide adsorption device.
  • the operating time can be understood as the time at which the carbon dioxide adsorption device actually adsorbs carbon dioxide.
  • the carbon dioxide content of the discharged gas may be measured at an exit of the carbon dioxide adsorption device. Such a measurement can take place at predetermined time intervals or continuously.
  • the predetermined value of the carbon dioxide content of the discharged gas can be set in various ways. So it is possible, for example, to set a predetermined value, which may be exceeded in any case. Alternatively, however, it is also possible to compare the carbon dioxide content of the discharged gas with the carbon dioxide content of the introduced gas and set a predetermined difference of the carbon dioxide contents as a predetermined value. Such monitoring of carbon dioxide content opens the possibility to draw accurate conclusions about the adsorption performance and thereby determine exactly when a regeneration of the carbon dioxide adsorption is necessary.
  • the carbon dioxide adsorption device has at least two carbon dioxide adsorption units containing carbon dioxide adsorption units, wherein at least one of the carbon dioxide adsorption units is regenerated during the regeneration of the carbon dioxide adsorption device.
  • a regeneration of the carbon dioxide adsorption device is thus to be understood as the state that at least one carbon dioxide adsorption unit is regenerated.
  • the carbon dioxide adsorbent is a known carbon dioxide adsorbent. This may in particular be in granular form and be filled accordingly in a pressure vessel. To reduce the carbon dioxide content, the gas mixture can then be passed through the filled with granular carbon dioxide adsorbent pressure vessel.
  • the carbon dioxide adsorbed gas exiting the carbon dioxide adsorption device may be filtered in a further step before being supplied to the separator.
  • a filtering step it is possible to prevent particles from the carbon dioxide adsorption device from entering a downstream device, for example the separating device.
  • the purity of the gas discharged from the carbon dioxide adsorption device is increased and contamination of downstream devices such as the separator is avoided.
  • at least one of the carbon dioxide adsorption units adsorbs carbon dioxide during the regeneration of the carbon dioxide adsorption device. Adsorption of carbon dioxide by the carbon dioxide adsorption device thus also takes place during the regeneration thereof.
  • a pressure drop occurs, for example, when a pressure equalization between the carbon dioxide adsorption is effected when switching.
  • a brief interruption is irrelevant to the overall process under certain circumstances.
  • the gas discharged from the carbon dioxide adsorption device is fed to a pressure accumulator, a short-term reduction in volume flow or a pressure drop does not have any effect.
  • the carbon dioxide adsorption device is subsequently provided with a compressor for pressurizing the discharged air with reduced carbon dioxide content, then it is necessary to obtain a constant volume flow even over the switching operation of the directional control valves.
  • a compressor operates in a specific nominal range and therefore compresses a predetermined amount of air.
  • an overflow valve can be provided between the inlet line and the carbon dioxide adsorption device. At the inlet, air can then be provided either from the pressure line or from a compressor with an amount which is above the desired amount of air at the inlet of the carbon dioxide adsorption device.
  • the overflow valve thus leaves air in normal operation, so that at the entrance of the carbon dioxide adsorption a predetermined amount of air flow is not exceeded. If a part of the air is branched off in the carbon dioxide adsorption device for pressure equalization purposes, then the volume flow through the carbon dioxide adsorption unit can be maintained due to the overflow valve. Namely, if a larger volume of air flow at the entrance of the carbon dioxide adsorption required, the overflow valve closes accordingly and the volume flow at the exit increases thereby.
  • a continuous operation of a downstream compressor is possible, which is used for example for pressure bottle filling.
  • Heated carbon dioxide adsorbent of the regenerated carbon dioxide adsorption unit for regeneration it is possible, for example, to heat a container in which the carbon dioxide adsorbent is located. For this purpose, a corresponding heating device can be provided. On the other hand, it is possible to heat the carbon dioxide adsorbent by heating the gas to be introduced for regeneration.
  • the nitrogen used for the regeneration of the carbon dioxide adsorption device is heated to a predetermined temperature.
  • the predetermined temperature is desirably chosen so that optimal regeneration of the carbon dioxide adsorbent can take place. This is the case when the carbon dioxide adsorbent is heated to a temperature at which the carbon dioxide adsorbent can best deliver the adsorbed carbon dioxide.
  • the heating of the nitrogen can be done for example by a separate heater, through which the nitrogen to be used for the regeneration is passed. It is possible that the heater heats the nitrogen to a constant temperature.
  • the gas used for regeneration can be heated to about 40-70 ° C.
  • the gas used for regeneration can be relaxed, that is, the gas used has a pressure of about 0.5 bar.
  • the introduction of the compressed air into the regenerated carbon dioxide adsorption unit takes place only when the temperature of the carbon dioxide adsorbent of the regenerated carbon dioxide adsorption unit is below a predetermined temperature.
  • This step takes account of the fact that optimum regeneration of the carbon dioxide adsorbent occurs at a different temperature level than the adsorption of carbon dioxide from the compressed air.
  • Regeneration can be done in different ways. For example, it is possible to actively cool the regenerated carbon dioxide adsorption unit by a corresponding cooling device. Alternatively, however, it is also possible to pass the nitrogen used for regeneration after the regeneration of the carbon dioxide adsorbent for a predetermined time by the carbon dioxide adsorbent without heating it. The carbon dioxide adsorbent is thus cooled by the separated nitrogen. This has the advantage that no additional elements for cooling the carbon dioxide adsorbent must be provided. It is also possible to wait a predetermined time before using the regenerated carbon dioxide adsorption unit until it has cooled to ambient temperature.
  • Monitored temperature of the carbon dioxide adsorption This makes it possible to continuously detect the temperature of the carbon dioxide adsorption units and to provide these detected values to a control. Thus it is possible to regulate the temperature of the carbon dioxide adsorption units to those for the current process, ie the adsorption of carbon dioxide or the regeneration, to the optimum temperature. This makes it possible to make both the adsorption of carbon dioxide, as well as the regeneration of the respective carbon dioxide adsorption as efficient as possible. Further, by monitoring the temperature of the carbon dioxide adsorption units, it is possible to avoid overheating of the carbon dioxide adsorption units.
  • the temperature monitoring of the carbon dioxide adsorption units may be coupled to such a heater and shut off according to the detected temperature, if necessary. With appropriate monitoring of the temperature of the carbon dioxide adsorption units, overheating and resulting damage to the carbon dioxide adsorption units can thus be avoided.
  • the compressed air is introduced into the regenerated carbon dioxide adsorption unit when a predetermined time has elapsed since the regeneration of the regenerated carbon dioxide adsorption unit.
  • the predetermined time since the regeneration can be set so that the regenerated carbon dioxide adsorption unit, or its carbon dioxide adsorbent, cools to such an extent that at least a predetermined temperature of the carbon dioxide adsorption unit is not exceeded for efficient carbon dioxide adsorption.
  • the predetermined time is thus set so that a corresponding cooling is done safely.
  • nitrogen separated from the separator is used at a temperature lower than the temperature of the carbon dioxide adsorbent of the regenerated one
  • Carbon dioxide adsorption unit is. Accordingly, to cool the temperature of the carbon dioxide adsorption unit, the separated nitrogen may be used if it has a temperature lower than the temperature level of the regenerated carbon dioxide adsorption unit or the carbon dioxide adsorbent contained therein. For example, the separated nitrogen from the separator may be directly supplied to the regenerated carbon dioxide adsorption unit. This accelerates the cooling of the regenerated carbon dioxide adsorption unit.
  • Dehumidification has the advantage that the carbon dioxide adsorption device can work more efficiently. In addition, it is possible to introduce compressed ambient air into the device.
  • an air handling apparatus comprising the following elements: a compressor for pressurizing ambient air, an inlet line for pressurized air,
  • a separator disposed downstream of the inlet conduit for reducing the nitrogen content of at least a portion of the pressurized air, the separator comprising a nitrogen blanking membrane, a second increased oxygen content gas exit, and a first nitrogen outlet gas outlet.
  • Separator arranged a regenerable carbon dioxide adsorption device.
  • its input can be connected to the inlet line and its output can be connected to the separating device.
  • the regenerable carbon dioxide adsorption device may comprise at least two carbon dioxide adsorption units containing carbon dioxide adsorbents. Each of these carbon dioxide adsorption units may have an inlet and an outlet.
  • the regenerable carbon dioxide adsorption device may include a directional control valve mechanism configured such that the inlets of the at least two carbon dioxide adsorption units are alternately connectable to the inlet of the carbon dioxide adsorption device and the environment and their outlets are alternately connectable to the exit of the carbon dioxide adsorption device and the second exit of the separation device. By this way valve mechanism, it is therefore possible to provide different gas flow paths.
  • Entrance of the carbon dioxide adsorption device are connected.
  • the carbon dioxide adsorption device is located between the dryer and the separating device. Accordingly, pressurized and dehumidified ambient air is introduced into the inlet of the carbon dioxide adsorption device. If the input of a carbon dioxide adsorption unit is now connected to the inlet of the carbon dioxide adsorption device, then the pressurized and dehumidified ambient air introduced into this carbon dioxide adsorption.
  • the outlet of the carbon dioxide adsorption unit can be connected to the outlet of the carbon dioxide adsorption unit. If this is the case, due to the arrangement of the carbon dioxide adsorption device, the gas guided through the carbon dioxide adsorption unit is then discharged through the outlet of the carbon dioxide adsorption device and fed to the separation device in the further course of the system. The gas exiting the exit of the carbon dioxide adsorption device thus has a reduced carbon dioxide content.
  • the outlet of the carbon dioxide adsorption unit is also connectable to the second outlet of the separation device.
  • separated nitrogen is discharged through the second outlet of the separator. That is, in the case where the outlet of the carbon dioxide adsorption unit is connected to this second outlet of the separator, the separated nitrogen is supplied to the carbon dioxide adsorption unit.
  • the separated nitrogen is thus used as a regenerant for regenerating the carbon dioxide absorption unit.
  • the ambient air may be passed through the carbon dioxide adsorption unit for reducing the carbon dioxide content in one direction, while the separated nitrogen may be passed in the opposite direction through the carbon dioxide adsorption unit to regenerate it.
  • the directional control valve mechanism may connect one or more inlets to the inlet of the carbon dioxide adsorption device or the environment and connect one or more outlets to the exit of the carbon dioxide adsorption device or the second outlet of the separation device.
  • This makes it possible to simultaneously introduce ambient air into a plurality of carbon dioxide adsorption units or to simultaneously introduce nitrogen into a plurality of carbon dioxide adsorption units.
  • it is possible to increase the carbon dioxide adsorption performance of the carbon dioxide adsorption device by connecting several carbon dioxide adsorption units in parallel.
  • the apparatus further comprises a compressor for pressurizing ambient air, wherein the compressor is disposed upstream of the inlet duct to supply pressurized ambient air to the inlet duct.
  • the apparatus has a dryer disposed upstream of the carbon dioxide adsorption device for dehumidifying the pressurized air, the dryer being connected to the inlet duct to supply dehumidified air to the inlet duct.
  • Directional control valve mechanism a first directional control valve, which is arranged so that it simultaneously connects one of the inlets of the carbon dioxide adsorption with the entrance of the carbon dioxide adsorption and another of the inlets with the environment.
  • the directional control valve mechanism has a second directional control valve arranged to simultaneously connect one of the outlets of the carbon dioxide adsorption units to the exit of the carbon dioxide adsorption device and another one of the outlets to the second outlet of the separator.
  • the first directional control valve is thus designed such that whenever the inlet of a carbon dioxide adsorption unit is connected to the inlet carbon dioxide adsorption device, the inlet of another carbon dioxide adsorption unit the environment is connected.
  • coupling one outlet of a carbon dioxide adsorption unit to the exit of the carbon dioxide adsorption device through the second directional control valve results in communication of another outlet with the second outlet of the separation device.
  • the first and the second directional control valve are coupled in such a manner that the outlet of the carbon dioxide adsorption unit, whose inlet is connected to the environment, is connected to the second outlet of the separation device, whereby this carbon dioxide adsorption unit is brought into a regeneration state and that the outlet of the carbon dioxide adsorption unit whose inlet is connected to the inlet of the carbon dioxide adsorption device is connected to the outlet of the carbon dioxide adsorption device, whereby this carbon dioxide adsorption unit is brought into an adsorption state.
  • the two-way valves are thus switched so that one carbon dioxide adsorption unit is in the regeneration state, while another carbon dioxide adsorption unit is in an adsorption state.
  • Separating device derived nitrogen supplied through the outlet This flows through the carbon dioxide adsorption unit and the carbon dioxide adsorbent contained therein thus leaves the carbon dioxide adsorption unit through its inlet and is discharged into the environment.
  • Carbon dioxide adsorption device further comprises heating means for heating the carbon dioxide adsorbent of the carbon dioxide adsorption unit to be regenerated.
  • heating means for heating the carbon dioxide adsorbent of the carbon dioxide adsorption unit to be regenerated.
  • the carbon dioxide adsorbent for regeneration can be heated to an optimum temperature. This temperature for regeneration may be above the temperature for adsorbing carbon dioxide. If so, it is advantageous to use the heating means to heat the carbon dioxide adsorbent to the desired temperature for regeneration.
  • the heating means has a heater for heating the separated nitrogen, which is arranged between the second output of the separator and the second directional control valve.
  • the heated nitrogen can be used to heat the carbon dioxide adsorbent of the carbon dioxide adsorption unit to be regenerated. If the carbon dioxide adsorbent is a granulate which is in the carbon dioxide adsorption unit, this has the advantage that the heated nitrogen flows through this granulate and good heating of the carbon dioxide adsorbent can be achieved.
  • the heating means a heater for direct
  • Heating the carbon dioxide adsorbent have.
  • a heater may, for example, heat the carbon dioxide adsorption unit as a whole.
  • the carbon dioxide adsorption unit is a container in which granules are contained as a carbon dioxide adsorbent
  • the container can be heated by the heater.
  • further heating elements which are provided in the granules, in order to achieve the most uniform possible heating of the carbon dioxide adsorbent.
  • Carbon dioxide adsorption unit a pressure vessel in which the carbon dioxide adsorbent is housed in opposite directions permeable.
  • a granulate is used as the carbon dioxide adsorbent, it may be arranged between two screens to prevent the carbon dioxide adsorbent from escaping from the pressure vessel.
  • the pressure vessels are connected to each other by a pressure equalization line.
  • the connection of the pressure vessel with each other by a pressure equalization line is advantageous because this allows that when switching the pressure vessel from a regeneration state into an adsorption state, the pressure of one container can be compensated with the pressure of the other container.
  • a pressure compensation valve is provided in the pressure equalization line, which is a shut-off valve. By opening and closing this shut-off valve, pressure equalization can be enabled or prevented.
  • the first directional control valve is connected via a drain line to the environment.
  • a silencer may be provided at the end of this drain line.
  • a bleed valve which is a shut-off valve, may be provided in the bleed line. Opening and closing the drain valve can break a connection with the environment.
  • An advantageous switching operation in the carbon dioxide adsorption apparatus in which the carbon dioxide adsorption units are brought from the adsorption state to the regeneration state by the directional control valves, and vice versa can be carried out as follows. First, the pressure equalization valve is opened and preferably at the same time the drain valve is closed. As a result, pressurized air from the carbon dioxide adsorption unit to be regenerated flows into the regenerated carbon dioxide adsorption unit, whereby pressure equalization takes place between both carbon dioxide adsorption units.
  • the two directional control valves are switched so that the inlet of the regenerated carbon dioxide adsorption unit is connected to the inlet of the carbon dioxide adsorption device and the outlet of the regenerated carbon dioxide adsorption unit is connected to the outlet of the carbon dioxide adsorption unit. adsorption device is connected. Due to the pressure equalization before switching over the directional control valves, the regenerated carbon dioxide adsorption unit already has an internal pressure which corresponds to the pressure at the inlet of the carbon dioxide adsorption device.
  • the carbon dioxide adsorption unit to be regenerated also has a pressure level when switching, which corresponds to the pressure level at which the compressed air is introduced into the carbon dioxide adsorption device.
  • the pressure compensation valve is closed and the drain valve is opened.
  • the gas which is to be regenerated in the carbon dioxide adsorption unit which is to be regenerated is thus released into the environment extremely rapidly. It can come to a kind of bang.
  • This rapid pressure reduction in the regenerated state carbon dioxide adsorption unit has the advantage that a part of the bound carbon dioxide is entrained by the gas flow.
  • a spill valve may be provided in the flow path before the carbon dioxide adsorption and after the inlet, a spill valve. This is important, for example, when a compressor is arranged downstream of the carbon dioxide, which requires a continuous inlet flow.
  • the spill valve may regulate the amount of air introduced into the carbon dioxide adsorption device to a predetermined value. In this case, part of the air can be released to the environment.
  • the overflow valve can be supplied with a larger amount of air than the amount desired in the carbon dioxide adsorption device.
  • the upstream overflow valve can compensate for the reduced volume flow at the outlet by correspondingly less air to the environment. As a result, a reduced volume flow at the outlet of the carbon dioxide adsorption device can be avoided.
  • the method described above is performed in the apparatus described above.
  • Air treatment process provided with the following steps:
  • At least partially regeneration of the carbon dioxide adsorption device with at least a portion of the separated nitrogen At least partially regeneration of the carbon dioxide adsorption device with at least a portion of the separated nitrogen.
  • an air conditioning apparatus comprising the following elements:
  • a separator arranged downstream of the inlet duct for reducing the nitrogen content of at least a portion of the pressurized air, the separator comprising a membrane for separating nitrogen, a second outlet for the recovered gas with increased Oxygen content, a first output for discharging the separated nitrogen and having an inlet connected to the inlet line.
  • a regenerable carbon dioxide adsorption device for reducing the carbon dioxide content of the oxygen-enriched air is also connected to the inlet line.
  • an arrangement is provided for at least partially regenerating the carbon dioxide adsorption device with at least a portion of the separated nitrogen.
  • This arrangement can be arranged as in the above
  • Embodiments is defined, in which the separation device is connected in the flow downstream of the carbon dioxide adsorption.
  • the arrangement for regenerating the carbon dioxide adsorption device described in the above embodiments can be applied to this embodiment.
  • Figure 1 shows schematically the structure of a device for producing conditioned air according to a first embodiment.
  • Figure 2 shows schematically the structure of a carbon dioxide adsorption device which can be used in the construction shown in Figure 1.
  • FIG. 3 shows the carbon dioxide adsorption device of FIG. 2 in another
  • FIG. 4 schematically shows an alternative construction of a device for producing conditioned air.
  • FIG. 5 schematically shows a further alternative construction of a device for
  • FIG. Fig. 1 is a schematic view showing the structure of a conditioned air producing apparatus.
  • the structure described below is particularly well suited for generating oxygen-enriched breathing air.
  • the basic structure of the apparatus will be explained with reference to the illustration in FIG.
  • the illustrated in Fig. 1 apparatus for producing conditioned air has a compressor VI, which is connected to an inlet or inlet 21 for compressed ambient air.
  • the compressor has predetermined characteristics which include the rated pressure as well as the throughput of the compressed air.
  • a refrigerant dryer 4 is arranged in the flow direction after the inlet 21 for compressed ambient air.
  • This refrigeration dryer 4 may have an integrated Kondensatabieiter.
  • the derived condensate is fed to a collecting container 19. Of the Refrigeration dryer 4 cools the incoming compressed ambient air so far that falls below the dew point, the water contained in the air and thus can be removed from the air.
  • a carbon dioxide adsorption device 22 is provided in the flow direction after the refrigerant dryer 4.
  • the pressurized and dehumidified ambient air flows.
  • the carbon dioxide adsorption device 22 reduces the carbon dioxide content of the introduced ambient air.
  • a separator 20 is arranged in the flow direction after the carbon dioxide adsorption device 22, a separator 20 is arranged.
  • the separator has an inlet 13a for the compressed and dehumidified ambient air, a membrane 13 for separating nitrogen, a first outlet 13b for discharging the separated nitrogen and a second outlet 13c for the recovered gas with increased oxygen content.
  • the first exit 13b is connected to the carbon dioxide adsorption device 22.
  • the oxygen-enriched breathing air is released via the second outlet 13c.
  • the inventive arrangement of the system components described above thus results in a reduction of the carbon dioxide content before separation in the membrane 13.
  • the carbon dioxide adsorption device 22 operates in an overpressure range of about 7 to 13, preferably 7 to 10 bar.
  • the carbon dioxide adsorption device 22 has a first carbon dioxide adsorption unit 23 and a second carbon dioxide adsorption unit 24.
  • the first carbon dioxide adsorption unit 23 has a pressure vessel 23c, an inlet 23a and an outlet 23b. Furthermore, the first carbon dioxide adsorption unit 23 has a thermometer 23d and a pressure gauge 23e.
  • the Pressure vessel 23c of the first carbon dioxide adsorption unit 23 is filled with a carbon dioxide adsorbent (not shown).
  • the carbon dioxide adsorbent may be granular. In this case, advantageously, in each case a sieve can be arranged before and after the carbon dioxide adsorbent in order to prevent the carbon dioxide adsorbent from escaping from the pressure vessel 23c.
  • the pressure vessel 23c may be a stationary pressure vessel.
  • the inlet of such a stationary pressure vessel 23c is located at the lower end, so that the gas introduced into the inlet flows through this vessel from the bottom to the top.
  • the screen between the carbon dioxide adsorbent and the inlet 23a may conveniently be formed as a sieve bottom which traps the carbon dioxide adsorbent and evenly distributes the incoming gas to the carbon dioxide adsorbent.
  • the outlet 23b is expediently arranged at the upper end of the pressure vessel 23c.
  • the second screen may be mounted to prevent the carbon dioxide adsorbent from being entrained by the flow.
  • a particulate filter 34 is disposed in the outlet 22b of the carbon dioxide adsorption device 22.
  • the second carbon dioxide adsorption unit has according to this
  • Embodiment an identical structure. More specifically, the second carbon dioxide adsorption unit 24 has a pressure vessel 24c, an inlet 24a, an outlet 24b, and a thermometer 24d and a pressure gauge 24e.
  • the internal structure or the filling of the pressure vessel 24c with carbon dioxide adsorbent corresponds to that of the first carbon dioxide adsorption unit 23.
  • the inlet 23a of the first carbon dioxide adsorption unit 23 and the inlet 24a of the second carbon dioxide adsorption unit 24 are connected to a first directional control valve 25 via pressure lines 38, 39.
  • the first directional control valve 25 is connected to the inlet 22 a of the carbon dioxide adsorption device 22.
  • the first directional control valve 25 is connected to the environment via a discharge line 37. In the discharge line 37, a drain valve 31 and a muffler 30 are arranged, through which the gas flowing from the first directional control valve 25 can be discharged into the environment.
  • the first directional control valve 25 is switchable between two switching positions.
  • Fig. 2 shows a first switching position is shown. Is the first directional control valve 25 in this In the first switching position, the inlet 22a of the carbon dioxide adsorption device 22 is connected to the pressure line 38, and the outlet line 37 is connected to the pressure line 39 leading to the inlet 24a of the second carbon dioxide adsorption unit 24.
  • the outlets of the carbon dioxide adsorption units 23b, 24b are connected via pressure lines 40, 41 to a second directional control valve 26.
  • the second output 13b of the separation device 20 is connected to the second directional control valve.
  • a heater 27 is arranged in the line of the second output 13b.
  • the second directional control valve 26 is connected to the outlet 22b of the carbon dioxide adsorption device 22.
  • the second directional valve 26 is also switchable between two positions. In a first position, as shown in FIG. 2, the second directional valve 26 is switched so that the first outlet 13b is connected to the pressure line 41 and thus to the outlet 24b of the second carbon dioxide adsorption unit 24.
  • the outlet 22b of the carbon dioxide adsorption device 22 is connected via the pressure line 40 to the outlet 23b of the first carbon dioxide adsorption unit 23.
  • the second carbon dioxide adsorption unit 24 is in communication with the outlet 22b of the carbon dioxide adsorption device 22 and the first outlet 13b of the separator 20 is connected to the first carbon dioxide adsorption unit 23.
  • the switching of the first directional control valve 25 is coupled to the switching of the second directional control valve 26.
  • Switching state of the two-way valves 25, 26 sets two flow paths. On the one hand, a flow can take place from the inlet 22a through the first carbon dioxide adsorption unit 23 to the outlet 22b. On the other hand, a flow from the first exit 13 b through the second carbon dioxide adsorption unit 24 into the discharge line 37 is possible.
  • the first carbon dioxide adsorption unit 23 is therefore in an adsorption state.
  • the nitrogen separated in the separator 20 flows through the second carbon dioxide adsorption unit 24, exiting through the inlet 24a thereof, and discharged through the discharge pipe 37 to the outside.
  • the flow direction of the nitrogen through the second carbon dioxide adsorption unit 24 is opposite to the flow direction of the ambient air through the first carbon dioxide adsorption unit 23.
  • Directional valves 25, 26, the conditions prevailing in Fig. 2 states of the two carbon dioxide adsorption 23, 24 also switched. More specifically, in the valve switching state shown in Fig. 3, the first carbon dioxide adsorption unit 23 is in a regeneration state, and the second carbon dioxide adsorption unit 24 is in an adsorption state. By alternately switching back and forth between the two states shown in Figs. 2 and 3, it is possible to continuously reduce the carbon dioxide content of the ambient air while simultaneously regenerating a carbon dioxide adsorption unit.
  • the carbon dioxide adsorption device 22 is initially in the state shown in FIG. More specifically, the first carbon dioxide adsorption unit 23 is in an adsorption state and the second carbon dioxide adsorption unit 24 is in a regeneration state. Both carbon dioxide adsorption units 23, 24 are designed such that in the adsorption state each carbon dioxide adsorption unit is capable of adsorbing carbon dioxide over a period of 60 minutes, for example. At the same time the system is designed so that a regeneration and subsequent cooling of the Carbon dioxide adsorption units 23, 24 is also possible within this time. After an operating time of 60 minutes, the system shown in Fig. 2 is thus switched to the state shown in Fig. 3.
  • carbon dioxide adsorption is continuously performed in the first carbon dioxide adsorption unit 23.
  • the carbon dioxide content of the gas flowing through is reduced.
  • the second carbon dioxide adsorption unit 24 is regenerated by supplying this separated nitrogen through the first outlet 13b to the separating device 20.
  • the nitrogen is heated by a heater 27 to accelerate the regeneration process.
  • heating of the separated nitrogen takes place for a period of 45 minutes before it is introduced into the second carbon dioxide adsorption unit 24.
  • the carbon dioxide adsorbent contained in the carbon dioxide adsorption unit is thereby brought to a predetermined temperature, which enables efficient regeneration of the carbon dioxide adsorbent.
  • a cooling cycle which lasts 15 minutes follows.
  • the heater 27 is deactivated, so that the separated nitrogen is introduced into the second carbon dioxide adsorption unit 24 at a lower temperature.
  • the temperature of the second carbon dioxide adsorption unit 24 or the carbon dioxide adsorbent contained therein is reduced.
  • the system can be tuned so that even during the cooling, a further regeneration of the carbon dioxide adsorbent takes place. It is also possible to design the system so that a complete regeneration takes place during the heating cycle.
  • Pressure compensation valve 29, which is located in a pressure equalization line 28, opened.
  • the pressure equalization line 28 connects the first carbon dioxide adsorption unit 23 to the second carbon dioxide adsorption unit 24. If the pressure compensation valve 29 is now open, the pressurized air supplied to the first carbon dioxide adsorption unit 23 can flow through the equalization line 28 and enter the second carbon dioxide adsorption unit 24. At the same time, with the opening of the pressure compensating valve 29, a drain valve 31, which is located in the drain line 37, is closed. A portion of the air pressurized in the first carbon dioxide adsorption unit 23 thus leaves it via the equalization line 28 and flows into the second carbon dioxide adsorption unit 24.
  • the lines and carbon dioxide adsorption units are selected such that pressure equalization is possible within 30 to 60 seconds.
  • the pressure in the second carbon dioxide adsorption unit 24 increases. Such an increase can be detected, for example, by corresponding sensors.
  • the first directional control valve 25 and the second directional control valve 26 are switched over and subsequently the discharge valve 31 is opened and the pressure compensation valve 29 is closed.
  • the first carbon dioxide adsorption unit 23 is now in the regeneration state and the second carbon dioxide adsorption unit 24 is now in the adsorption state.
  • a renewed switching of the system takes place in the switching state shown in Fig. 2.
  • the cycle time is set here by way of example to 60 minutes. Depending on the configuration of the carbon dioxide adsorption units, however, different cycle times can be selected. It is only important in this context that the adsorption time and the regeneration time of the two carbon dioxide adsorption units are coordinated so that a complete regeneration of a carbon dioxide adsorption unit is possible, while the other carbon dioxide adsorption unit adsorbs carbon dioxide.
  • a sensor may also be provided which detects the deterioration state of the adsorbing carbon dioxide adsorption unit. If a regeneration of this carbon dioxide adsorption unit is required, this sensor outputs a corresponding signal which triggers a corresponding switchover process.
  • a filter device 2 may be provided with an electronic Kondensatabieiter.
  • the filter device 2 can be designed to filter solids and other foreign substances, such as liquids, from the compressed ambient air and remove it from the flow.
  • the discharged solids and liquids in the form of the condensate can be fed to a condensate separator, which is designated in FIG. 1 by the reference numeral 19.
  • a safety valve 3 may be provided that opens when a set pressure is exceeded and the compressed air blows into the environment.
  • the safety valve can be set up with an opening pressure of 11 bar. Both elements can thus be arranged after the compressor VI and before the refrigerant dryer 4.
  • an overflow valve 5 may be connected.
  • This overflow valve 5 is provided in the example shown in Fig. 1 with a muffler.
  • the function of the overflow valve 5 is related to the operation of the compressor VI to be connected.
  • the overflow valve 5 causes an intermittent operation of the connected compressor VI can be avoided. By accepting a slightly reduced efficiency, the service life of the compressor can thus be increased by avoiding intermittent operating situations.
  • a filter cascade can be provided in the flow direction after the overflow valve 5.
  • the filter elements are arranged in the embodiment in Fig. 1 with respect to the flow directions in series. The filtering can be carried out in stages by the three filter elements connected in series.
  • the filter element 8 may be formed as an activated carbon filter.
  • the filter cascade is located immediately in front of the carbon dioxide adsorption device 22.
  • Pressure reducing valve 9 is provided. This pressure reducing valve 9 can be adjustable and causes a predetermined outlet pressure at the outlet of the pressure reducing valve 9 to be maintained. This pressure can be monitored by a pressure gauge 10 that detects the pressure downstream of the pressure reducing valve 9.
  • a compressed air heater 11 may be provided.
  • the compressed air heater 11 may be an electric heater with an electric heating element. By the compressed air heating, it is possible to regulate the outlet temperature at the outlet of the compressed air heater 11 to a predetermined temperature. A monitoring of the temperature of the compressed air at the outlet of the compressed air heater 11 can be done by a thermometer 12.
  • the separation device 20 described above is at the exit of the
  • Compressed air heater 11 connected.
  • On the line of the second output 13c of the separator 20 may be a
  • Safety valve 15 must be connected for overpressure. This safety valve 15 opens as soon as the pressure exceeds a predetermined value to protect the device from overpressure.
  • a safety valve 16 for negative pressure or vacuum may be connected to the line of the second output 13c. This safety valve 16 opens as soon as the pressure falls below a predetermined value in order to protect the device from negative pressure or vacuum. In particular, in case of failure of the compressor VI or blockage of the system should be prevented that a vacuum is generated by operation of a filling device V2 described later, which could damage the device.
  • a pressure gauge 17 for measuring the pressure in the second output 13c may be connected. With this gauge 17, the pressure within the conduit can be measured, is derived in the oxygen-enriched air.
  • a filling device V2 may be connected, which essentially comprises a compressor. In particular, the entry of a compressor is connected to the outlet of the second outlet 13c. This compressor can absorb the oxygen-enriched breathing air and can this in a compressed state for further processing, in particular for the filling of diving bottles o.a. hand off. If such a compressor is used at the outlet of the second outlet 13c, it is important to provide a constant volume flow in the second outlet 13c.
  • the overflow valve 5 described above.
  • the above-described spill valve 5 can cause the carbon dioxide adsorption device to be supplied with more pressurized air to equalize the branched air amount.
  • the first output 13b may include a throttle valve 14. This is
  • Throttling valve 14 may cause sufficient pressure prevails in the separation device 20, in particular at the inlet 13 a of the membrane 13, which is suitable for the function of the selective membrane 13.
  • the outlet of the throttle valve 14 is connected to the carbon dioxide adsorption device 22 to guide the gas stream mainly of nitrogen into the carbon dioxide adsorption device 22.
  • the gas stream consisting mainly of nitrogen also referred to as separated nitrogen, is used to regulate the carbon dioxide adsorption device 22.
  • the entire device has a defined mode of operation, which was previously not possible in the prior art.
  • the targeted arrangement of the carbon dioxide adsorption device 22 it is possible to produce oxygen-enriched breathing air with greatly reduced carbon dioxide content.
  • the use of regeneratable carbon dioxide adsorption units also has the advantage that the entire plant can be operated cost-effectively for a long time, since the regeneratable carbon dioxide adsorption units can be used for a long time.
  • Carbon dioxide adsorption device supplies pressurized and dehumidified ambient air
  • the carbon dioxide adsorption device 22 can also be connected directly to a compressed air system, which provides pressurized and dehumidified air.
  • the compressor and the dryer before the carbon dioxide adsorption can be dispensed with.
  • Carbon dioxide adsorption device derived volume flow into a separator. Rather, it is also possible to supply only a partial flow of the air with reduced carbon dioxide content of a separator in order to separate the nitrogen required for the regeneration therein.
  • a compressed air system which provides pressurized and dehumidified ambient air is connected to the inlet 21 of the air treatment device.
  • the inlet 21 is connected to a carbon dioxide adsorption device, as they are is described above with reference to Figures 2 and 3.
  • the outlet 22b of the carbon dioxide adsorption device may be connected to an end user or a buffer and discharges the recovered air with reduced carbon dioxide content.
  • the input 13a of the separation device branches off from the output 22b, thus making it possible to remove a partial flow from line 22b.
  • This partial flow is then fed to the membrane 13.
  • the separated nitrogen is then supplied via the first outlet 13b of the carbon dioxide adsorption device.
  • the separated residual gas with reduced nitrogen content is discharged via the second output 13 c and via the discharge line 37 into the environment.
  • Fig. 5 is a schematic view of a further alternative
  • the input of the separator 13 is not connected to the output 22b as shown in FIG. Rather, in the embodiment of FIG. 5, the input of the separator is connected to the inlet 21.
  • the pressurized air may be introduced directly into the separator without passing through the carbon dioxide adsorption device 22.
  • the procedure and the specific embodiment of the device with regard to the regeneration of the carbon dioxide adsorption device can be provided according to the above embodiments and adapted accordingly.

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  • Oil, Petroleum & Natural Gas (AREA)
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Abstract

L'invention concerne un procédé de production d'air traité. Le procédé comprend les étapes suivantes : fourniture d'air comprimé, réduction de la teneur en dioxyde de carbone de l'air comprimé dans un dispositif d'adsorption de dioxyde de carbone (22), envoi de l'air comprimé à teneur en dioxyde de carbone éventuellement réduite dans un dispositif de séparation (20) qui contient une membrane (13) destinée à séparer l'azote, évacuation de l'air traité hors du dispositif de séparation (20), évacuation de l'azote séparé hors du dispositif de séparation (20), régénération au moins par portions du dispositif d'adsorption de dioxyde de carbone (22) avec au moins une partie de l'azote séparé.
EP15731270.3A 2014-06-25 2015-06-15 Procédé et dispositif de traitement d'air avec adsorption de dioxyde de carbone et enrichissement en oxygène Ceased EP3160619A1 (fr)

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DE102014108874.3A DE102014108874A1 (de) 2014-06-25 2014-06-25 Luftaufbereitungsverfahren und -vorrichtung
PCT/EP2015/063366 WO2015197418A1 (fr) 2014-06-25 2015-06-15 Procédé et dispositif de traitement d'air avec adsorption de dioxyde de carbone et enrichissement en oxygène

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DE102016106225B4 (de) * 2016-04-05 2022-05-05 Krinner Drucklufttechnik Gmbh Luftaufbereitungsvorrichtung und -verfahren
DE102017122853A1 (de) * 2017-10-02 2019-04-04 Krinner Drucklufttechnik Gmbh Luftaufbereitungsvorrichtung und -verfahren mit verbesserter Funktion
CN112638501A (zh) 2018-08-23 2021-04-09 皇家飞利浦有限公司 具有氧气侧平衡的混合氧气浓缩器
GB201901445D0 (en) * 2019-02-01 2019-03-27 Provost Fellows Found Scholars And The Other Members Of Board Of The College Of The Holy And Undivid Improvements relating to carbon dioxide capture
EP3739211B1 (fr) * 2019-05-13 2021-03-31 J.P. Sauer & Sohn Maschinenbau GmbH Système de compresseur et procédé de séparation de dioxyde de carbone de l'air
DE102020103333B3 (de) * 2020-02-10 2021-05-06 Krinner Drucklufttechnik Gmbh Verfahren zum Vermehren von Hefezellen
DE102020116514A1 (de) 2020-06-23 2021-12-23 Krinner Drucklufttechnik Gmbh Vorrichtung und verfahren zur atemlufterzeugung
CN116697508A (zh) * 2023-07-19 2023-09-05 华中科技大学 一种自循环二氧化碳变温吸附装置

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