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
  • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
  • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
  • B01D53/047—Pressure swing adsorption
  • B01D53/0476—Vacuum pressure swing adsorption
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
  • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
  • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
  • B01D53/047—Pressure swing adsorption
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
  • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
  • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
  • B01D53/047—Pressure swing adsorption
  • B01D53/053—Pressure swing adsorption with storage or buffer vessel
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
  • C01B13/02—Preparation of oxygen
  • C01B13/0229—Purification or separation processes
  • C01B13/0248—Physical processing only
  • C01B13/0259—Physical processing only by adsorption on solids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2256/00—Main component in the product gas stream after treatment
  • B01D2256/12—Oxygen
• • 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

Definitions

• the invention relates to a method for adsorptive decomposition of a gas mixture by means of a vacuum pressure swing adsorption, wherein the gas mixture to be decomposed is compacted before being fed into the vacuum pressure swing adsorption by means of at least one compressor to the adsorption and the regeneration of the adsorber or by means of at least one vacuum pump ,
• the invention relates to an apparatus for carrying out a method for adsorptive decomposition of a gas mixture by means of a vacuum
• Pressure swing adsorption process comprising at least one compressor, at least one adsorber and at least one vacuum pump.
• Vacuum pressure swing adsorption (VPSA) processes are well known in the art. They differ from pressure swing adsorption processes or PSA processes in that the regeneration of a loaded adsorber takes place at a subatmospheric pressure. In order to achieve this, the adsorbers to be regenerated are regenerated by means of a vacuum pump.
• the desorption pressure is usually between 100 and 500 mbara. The adsorption usually takes place at overpressure. For this reason, a compressor is provided as a rule, which compresses the gas mixture to be separated before being fed into the vacuum pressure swing adsorption process to the desired adsorption pressure.
• VPSA processes have long been used in so-called on-site systems for the production of oxygen and have a very low energy consumption.
• hospital should also be understood as meaning mobile (emergency) hospitals, ambulances, medical practices, wellness centers, etc.
• the infrastructure of a modern hospital includes u. a. the supply of patients with so-called “medical air”, with oxygen-enriched air and with pure oxygen.
• medical air is usually a
• Understood gas mixture having about 20% oxygen and about 80% nitrogen and with respect to other components, such as, for example, water and carbon monoxide,
• the infrastructure of a hospital usually includes a compressed air and a vacuum system.
• the latter is a system that maintains vacuum by means of vacuum pumps and buffer tanks in a piping system that can be used by the hospital for all types of suction, e.g. B. in operating theaters, for
• Object of the present invention is to provide a generic method and a generic device for adsorptive decomposition of a gas mixture by means of a vacuum pressure swing adsorption process, which avoids the aforementioned disadvantages and in particular for use in
• a generic method is proposed, which is characterized in that at those times when no gas mixture is supplied to the vacuum pressure swing adsorption process, the compressed gas mixture is at least temporarily and / or at least partially buffered and / or supplied to a consumer and / or
• At least a first storage container is provided and this is connected to the or at least one of the compressors such that at those times when the vacuum pressure swing adsorption no
• the compressed gas mixture at least temporarily and / or at least partially into the or at least one of the first
• Storage tank is guided and / or
• At least one second storage container is provided and this is connected to the or at least one of the vacuum pumps such that
• Adsorber is supplied, wherein the feed preferably in the case of exceeding an adjustable pressure value in the intermediate storage
• Storage tank is connected, at least temporarily connected to the evacuated storage tank with the or in the desorption phase adsorber, said connecting preferably at
• the method according to the invention can also be implemented with only one or more than two adsorbers.
• the adsorbers directly upstream and downstream adsorber valves whose functions are familiar to the expert, not shown in the figure.
• the VPSA plant according to the invention also has a compressor unit C, a vacuum pump unit V, three storage tanks S1 to S3 and valves or check valves a and b.
• the procedure according to the invention will be explained below on the basis of the adsorptive decomposition of air to obtain an oxygen-rich product stream. Via line 1, air is designed in one or more stages
• Compressor unit C is supplied and compressed in this to the desired adsorption pressure.
• the compressed air stream is then fed via line 1 'to that of the two adsorbers A and A', which is in the adsorption phase.
• an oxygen-rich product stream is withdrawn via line 2 and optionally
• the oxygen-rich product stream can be removed via line 2 'and fed to its further use.
• Compressed air buffer S1 connected.
• a non-return valve a is provided, which opens upon reaching a certain pressure and thus releases access to the compressed air buffer S1.
• the pressure required for opening the check valve a is achieved by closing the adsorber valves upstream of the adsorbers A and A '.
• air flow can also be fed directly to a (compressed air) consumers.
• Storage tank or vacuum buffer S3 is done. The "filling" of the container S3 via the line 7th
• the pressure in the first storage tank or compressed air buffer S1 is preferably above the maximum adsorption pressure, while the pressure in the third Storage tank or vacuum buffer S3 is below the minimum desorption pressure.
• any alternative mechanism may be used, which in the appropriate and / or desired period, a connection between the first storage tank or
• Compressed air buffer S1 and the compressor C and between the third storage tank or vacuum buffer S3 and the vacuum pump V produces. Only exemplary may be mentioned switching valves, which are controlled by the control of the VPSA process or via a differential pressure measurement.
• a further advantageous embodiment of the method according to the invention is characterized in that at least temporarily and / or at least partially buffered, compressed gas mixture to or in the
• Adsorption is located adsorber, wherein the supply is preferably carried out when an adjustable pressure value is exceeded in the storage tank S1 used for the intermediate storage.
• an adjustable pressure value In the case of too low a decrease of compressed air, the pressure in the compressed air buffer S1 increases.
• a certain pressure value for example. 8 bar, then the compressed air from the compressed air buffer S1 at a suitable time in the
• the vacuum pump used for the regeneration of the adsorber or is at least temporarily connected to a storage container to be evacuated, according to a further advantageous embodiment of the method according to the invention, at least temporarily, the storage container to be evacuated connected to the or in the desorption phase adsorber, said connecting Preferably falls below an adjustable pressure value in the
• Vacuum pump and / or falling below an impermissibly low pressure in the vacuum buffer S3 can be prevented.
• Vacuum pump which are required for the VPSA process, additionally used for the generation of compressed air and vacuum.
• Vacuum pump (s) are thereby used more effectively and it accounts for compared to the prior art those, separate machines that would otherwise be provided for the generation of compressed air and vacuum.
• run compressor and vacuum pump (s) if they are not required during certain process steps, so far in bypass mode.
• this operation requires additional piping with lines and bypass flaps, which can now be dispensed with.
• the process or process steps of the VPSA process are preferably extended accordingly.
• inventive method and the inventive apparatus for adsorptive decomposition of a gas mixture by means of a vacuum pressure swing adsorption process are particularly suitable for use in Hospitals, as they enable the provision of oxygen, compressed air and vacuum through a single process or facility.
• the invention can be used in any production facilities and (large) facilities.

Landscapes

• Chemical & Material Sciences (AREA)
• Analytical Chemistry (AREA)
• Engineering & Computer Science (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Separation Of Gases By Adsorption (AREA)
• Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Priority Applications (13)

Applications Claiming Priority (2)

Publications (1)

Family

ID=44800977

Family Applications (1)

Country Status (17)

Families Citing this family (3)

Citations (4)

Family Cites Families (10)

• 2010
  • 2010-10-16 DE DE102010048774A patent/DE102010048774A1/de not_active Withdrawn
• 2011
  • 2011-10-05 PT PT117700518T patent/PT2627431T/pt unknown
  • 2011-10-05 CN CN2011800500505A patent/CN103228338A/zh active Pending
  • 2011-10-05 RU RU2013122472/05A patent/RU2579448C2/ru not_active IP Right Cessation
  • 2011-10-05 BR BR112013008756A patent/BR112013008756A2/pt not_active IP Right Cessation
  • 2011-10-05 JP JP2013533112A patent/JP6033228B2/ja not_active Expired - Fee Related
  • 2011-10-05 MX MX2013004116A patent/MX2013004116A/es active IP Right Grant
  • 2011-10-05 EP EP11770051.8A patent/EP2627431B1/de not_active Not-in-force
  • 2011-10-05 WO PCT/EP2011/004969 patent/WO2012048814A1/de not_active Ceased
  • 2011-10-05 KR KR1020137012536A patent/KR20130124327A/ko not_active Ceased
  • 2011-10-05 NZ NZ707197A patent/NZ707197A/en not_active IP Right Cessation
  • 2011-10-05 AU AU2011316161A patent/AU2011316161B2/en not_active Ceased
  • 2011-10-05 DK DK11770051.8T patent/DK2627431T3/da active
  • 2011-10-05 CA CA2812834A patent/CA2812834A1/en not_active Abandoned
  • 2011-10-05 PL PL11770051T patent/PL2627431T3/pl unknown
  • 2011-10-05 NZ NZ608669A patent/NZ608669A/en not_active IP Right Cessation
  • 2011-10-05 ES ES11770051.8T patent/ES2624732T3/es active Active
  • 2011-10-05 US US13/879,033 patent/US8961653B2/en not_active Expired - Fee Related

Patent Citations (4)

Also Published As

Similar Documents

Legal Events