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WO2004088197A1 - Alimentation en dioxyde de carbone - Google Patents

Alimentation en dioxyde de carbone Download PDF

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Publication number
WO2004088197A1
WO2004088197A1 PCT/EP2004/003180 EP2004003180W WO2004088197A1 WO 2004088197 A1 WO2004088197 A1 WO 2004088197A1 EP 2004003180 W EP2004003180 W EP 2004003180W WO 2004088197 A1 WO2004088197 A1 WO 2004088197A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
gas compressor
compressed
consumer
storage tank
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
PCT/EP2004/003180
Other languages
German (de)
English (en)
Inventor
Andreas Praller
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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Publication of WO2004088197A1 publication Critical patent/WO2004088197A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • B29C44/3446—Feeding the blowing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
    • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/018—Supporting feet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/013—Carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors

Definitions

  • the invention relates to a method for supplying a consumer with C0 2 , wherein liquid C0 2 is removed from a storage tank, compressed with a gas compressor and supplied to the consumer.
  • the invention further relates to a device for supplying a consumer with C0 2 , which comprises a storage tank for liquid C0 2 , a gas compressor connected to the storage tank on the liquid side and a discharge line between the outlet of the gas compressor and the consumer
  • blowing agents which are gaseous under normal conditions and which are fed under high pressure to a plastic, usually thermally softened plastic mass and mixed homogeneously with it. During the subsequent expansion of this mixture to normal pressure, foaming of the plastic caused by the blowing agent occurs.
  • Compressed inert gases are also increasingly used as blowing agents.
  • C0 2 is usually supplied from a low pressure tank in which the C0 2 is stored at a pressure of approximately 20 bar. The C0 2 removed from the tank is then compressed to the desired pressure by means of a liquid pump and supplied to the consumer.
  • a typical consumer in plastic foaming is a liquid CO 2 metering pump, which feeds the compressed CO 2 into an extruder.
  • Liquid CO 2 is stored in a foam-insulated storage tank 1 at a pressure of 20 bar and a corresponding temperature of -20 ° C. Liquid CO 2 is withdrawn from the tank 1 via a removal line 2 and fed to a liquid pump 3. A centrifugal or piston pump is usually used as the liquid pump 3. By means of the liquid pump 3, the liquid CO 2 is compressed to a pressure of, for example, 60 bar and passed to two liquid metering pumps 4a, 4b which meter the required amount of CO 2 into the downstream extruders 5a, 5b.
  • liquid pumps 3 must always be supplied with liquid, especially with liquid C0 2 . Furthermore, a liquid pump 3 cannot be connected directly in series with a metering pump 4a, 4b, since, in particular in the case of fluctuations in consumption, the consumption on the extruder 5a, 5b does not match the delivery characteristics or pump output of the liquid pump 3.
  • the object of the present invention is to provide a method and a device for supplying a consumer with C0 2 under increased pressure, which avoids the disadvantages described as far as possible.
  • This object is achieved by a method of the type mentioned in the introduction, in which the C0 2 is guided in a branch line from the storage tank via the gas compressor to the consumer.
  • the device according to the invention comprises a storage tank for liquid C0 2 , a gas compressor connected to the storage tank on the liquid side, and a discharge line between the outlet of the gas compressor and a consumer, which is characterized in that there is no flow connection between the discharge line and the storage tank.
  • a gas compressor similar to a liquid piston pump, the liquid C0 2 is conveyed by means of a moving piston.
  • the drive is not mechanical, but pneumatic or hydraulic.
  • the gas compressor stops the delivery of further liquid C0 2 automatically when the pressure corresponding to the ratio of the gas compressor is reached.
  • the movement of the piston or the delivery rate of the gas compressor cannot be synchronized with that of the connected consumer, even with a gas compressor when delivering liquid C0 2 , It was therefore previously believed that even when using a gas compressor to compress liquid CO 2, a ring line, as shown in FIG. 1, is necessary in order to ensure defined conditions for the connected consumer.
  • Storage tank, the gas compressor and the consumer can be arranged in a spur line, that is, the entire liquid C0 2 , which is removed from the storage tank, is also supplied to the consumer.
  • the invention has proven itself in particular when the CO 2 is compressed to a pressure between 50 and 90 bar, preferably 55 to 75 bar, which is probably due to the fact that the CO 2 is then present in the vicinity of the critical pressure.
  • the pressure range between 15 and 25 bar has proven to be advantageous as the outlet pressure.
  • single-stage gas compressors with a lower gear ratio can also be used.
  • Preferably 5 to 150 kg / h, particularly preferably 5 to 100 kg / h CO 2 are compressed.
  • a particularly advantageous field of application is the supply of metering pumps, in particular diaphragm or piston metering pumps, with liquid CO 2 .
  • metering pumps in particular diaphragm or piston metering pumps
  • liquid CO 2 as a blowing agent. It is essential for the subsequent foaming that defined amounts of CO 2 are fed to the extruder.
  • the provision according to the invention of a sufficient amount of liquid CO 2 under a defined pressure ensures that the metering pumps can meter the exact amount of CO 2 required in each case into the extruders.
  • the invention is particularly suitable for the production of plastic foams in extruders, injection molding machines, RIM machines (reaction injection molding) or double-belt systems.
  • it is also suitable for foaming other products or for introducing blowing agents into liquids.
  • the invention is also advantageously used for the supply of expansion nozzles, to which compressed C0 2 is supplied and expanded for cooling purposes.
  • FIG. 1 shows a device known from the prior art for supplying extruders with liquid CO 2 as a blowing agent and FIG. 2 shows a corresponding device according to the invention.
  • FIG. 1 and 2 each show a device for supplying extruders with liquid CO 2 .
  • the device shown in FIG. 1 was already explained in detail in the introduction to the description.
  • FIG. 2 shows a corresponding device operating according to the method according to the invention.
  • a low pressure tank 11 liquid C0 2 is stored under a pressure of 20 bar.
  • the tank 11 is designed as a vacuum-insulated tank.
  • a removal line 12 is attached, through which liquid C0 2 can be removed from the tank 11.
  • the removal line 12 there is a compressed air-operated gas compressor 13.
  • the gas compressor 13 By means of the gas compressor 13, the liquid CO 2 drawn off from the tank 11 can be compressed to a pressure of up to 500 bar.
  • the CO 2 emerging from the gas compressor 13 is fed, for example, to two metering pumps 14a, 14b arranged parallel to one another, each of which is connected to an extruder 15a, 15b. Diaphragm or piston metering pumps are preferably used.
  • the extruders 15a, 15b can be supplied with a volume or quantity metered stream of compressed CO 2 .
  • the gas compressor 13 only works when at least one of the extruders 15a, 15b requires liquid CO 2 . If the extruders 15a, 15b do not have to be supplied with liquid C0 2 as a blowing agent, only as much C0 2 is compressed in the gas compressor 13 in order to compensate for any pressure drops that may exist downstream of the gas compressor 13. If, on the other hand, a certain amount of CO 2 is drawn off from the metering pumps 14a, 14b and passed to the extruders 15a, 15b, the gas compressor 13 starts automatically and immediately compensates for the consumption of liquid CO 2 . A vote or adaptation of the delivery rate of the gas compressor 13 to the delivery rate of the metering pumps 14a, 14b is not necessary.
  • the gas compressor 13 it is not necessary to maintain a recycle stream of compressed C0 2 , as is necessary in the known method explained with reference to FIG. 1.
  • the gas compressor 13 therefore, only the amount of CO must be compressed, which is also consumed by the consumers 14a, 14b. If, for example, metering pumps 14a, 14b are used, with which 5 to 50 kg of CO 2 can be metered per hour, a gas compressor 13 with a maximum delivery rate of 100 kg / h CO 2 is theoretically sufficient. In practice, a gas compressor 13 will be selected in this case for safety reasons, which can compress up to about 150 kg / h CO 2 .
  • a vacuum-insulated storage tank can be used instead of a foam-insulated one.
  • a gas compressor with a lower delivery rate can also be selected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne un procédé et un dispositif servant à alimenter un consommateur (14a, 14b) en CO2. Selon l'invention, du CO2 liquide est prélevé d'un réservoir de stockage (11), est comprimé à l'aide d'un compresseur de gaz (13) et est amené au consommateur (14a, 14b). Ce faisant, le CO2 est conduit, dans une conduite de branchement, du réservoir de stockage (11) au consommateur (14a, 14b) en passant par le compresseur de gaz (13).
PCT/EP2004/003180 2003-04-01 2004-03-25 Alimentation en dioxyde de carbone Ceased WO2004088197A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003114797 DE10314797A1 (de) 2003-04-01 2003-04-01 Kohlendioxid-Versorgung
DE10314797.7 2003-04-01

Publications (1)

Publication Number Publication Date
WO2004088197A1 true WO2004088197A1 (fr) 2004-10-14

Family

ID=32980913

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/003180 Ceased WO2004088197A1 (fr) 2003-04-01 2004-03-25 Alimentation en dioxyde de carbone

Country Status (2)

Country Link
DE (1) DE10314797A1 (fr)
WO (1) WO2004088197A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054246C5 (de) * 2005-11-15 2011-08-18 MESSER Group GmbH, 65843 Vorrichtung und Verfahren zum Bestrahlen einer Oberfläche mit Trockeneis-Teilchen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751822A (en) * 1986-02-07 1988-06-21 Carboxyque Francaise Process and plant for supplying carbon dioxide under high pressure
EP0486957A1 (fr) * 1990-11-20 1992-05-27 Linde Aktiengesellschaft Procédé d'utilisation d'un gaz inerte pour la production de mousse plastique
EP0501806A1 (fr) * 1991-03-01 1992-09-02 Suprex Corporation Pompe pour dioxyde de carbone liquéfié
EP0615830A1 (fr) * 1993-02-25 1994-09-21 Linde Aktiengesellschaft Dosage d'un agent moussant pour l'obtention de matières plastiques alvéolaires
EP0841481A2 (fr) * 1996-11-12 1998-05-13 Linde Aktiengesellschaft Compression de dioxyde de carbone et d'oxyde d'azote
EP0857561A1 (fr) * 1997-02-05 1998-08-12 Linde Aktiengesellschaft Procédé et dispositif pour le refroidissement de profilés creux extrudés
US5888050A (en) * 1996-10-30 1999-03-30 Supercritical Fluid Technologies, Inc. Precision high pressure control assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751822A (en) * 1986-02-07 1988-06-21 Carboxyque Francaise Process and plant for supplying carbon dioxide under high pressure
EP0486957A1 (fr) * 1990-11-20 1992-05-27 Linde Aktiengesellschaft Procédé d'utilisation d'un gaz inerte pour la production de mousse plastique
EP0501806A1 (fr) * 1991-03-01 1992-09-02 Suprex Corporation Pompe pour dioxyde de carbone liquéfié
EP0615830A1 (fr) * 1993-02-25 1994-09-21 Linde Aktiengesellschaft Dosage d'un agent moussant pour l'obtention de matières plastiques alvéolaires
US5888050A (en) * 1996-10-30 1999-03-30 Supercritical Fluid Technologies, Inc. Precision high pressure control assembly
EP0841481A2 (fr) * 1996-11-12 1998-05-13 Linde Aktiengesellschaft Compression de dioxyde de carbone et d'oxyde d'azote
EP0857561A1 (fr) * 1997-02-05 1998-08-12 Linde Aktiengesellschaft Procédé et dispositif pour le refroidissement de profilés creux extrudés

Also Published As

Publication number Publication date
DE10314797A1 (de) 2004-10-14

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