WO2003101667A1 - Systeme de projection de neige carbonique - Google Patents

Systeme de projection de neige carbonique Download PDF

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Publication number
WO2003101667A1
WO2003101667A1 PCT/EP2003/005643 EP0305643W WO03101667A1 WO 2003101667 A1 WO2003101667 A1 WO 2003101667A1 EP 0305643 W EP0305643 W EP 0305643W WO 03101667 A1 WO03101667 A1 WO 03101667A1
Authority
WO
WIPO (PCT)
Prior art keywords
snow
die
chamber
particles
snow chamber
Prior art date
Application number
PCT/EP2003/005643
Other languages
German (de)
English (en)
Inventor
Robert Adler
Original Assignee
Linde Aktiengesellschaft
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 Aktiengesellschaft filed Critical Linde Aktiengesellschaft
Priority to AU2003238424A priority Critical patent/AU2003238424A1/en
Publication of WO2003101667A1 publication Critical patent/WO2003101667A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/50—Carbon dioxide
    • C01B32/55—Solidifying

Definitions

  • the invention relates to a device for producing solid C0 2 particles with a snow chamber having an inlet for CO 2 and a compressor for compressing and present in the snow chamber C0 2 snow, and the snow chamber on one side by an apertured provided die is completed. Furthermore, the invention relates to a method for producing solid CO 2 particles, wherein liquid CO 2 is expanded and a mixture of CO 2 snow and gaseous CO 2 is generated, which compresses CO 2 snow in a snow chamber to form a dry ice block and is pressed through a die provided with openings and the CO 2 particles emerging from the die are fed to a compressed gas stream.
  • Carbon dioxide is stored at a pressure between usually 12 and 22 bar, removed and expanded to atmospheric pressure via nozzles in a snow chamber.
  • a mixture of CO 2 snow and cold CO 2 gas is created.
  • the gas phase is separated from the CO 2 snow and the CO 2 snow is compressed using a compressor.
  • a piston compressor is used for this purpose, for example.
  • the resulting dry ice block is then pressed through a die to produce solid strands of CO 2 , which are then cut into pellets about the size of rice grains using a suitable crushing tool.
  • Compressed air flow metered in and conveyed to the jet nozzle usually has a pressure between 5 and 20 bar, while the CO 2 pellets are at atmospheric pressure.
  • a pressure lock is therefore necessary. All conventional pressure locks have moving parts, which represent a mechanical weak point at the prevailing temperatures down to -78 ° C and pressures up to 20 bar.
  • the object of the present invention is therefore to develop a device and a method for producing CO 2 pellets which avoid the disadvantages mentioned above.
  • a device comprising a snow chamber, which has an inlet for CO 2 and a compressor for compressing in the
  • a method according to the invention of the type mentioned at the outset is characterized in that the compressed gas flow is guided past the die and that the dry ice block shields the snow chamber from the compressed gas flow in a pressure-tight manner.
  • Dry ice is created when liquid CO 2 is released to atmospheric pressure.
  • the CO 2 snow is then compressed to a dry ice block by a compressor and pressed through a die to produce elongated CO 2 particles. Any gaseous CO 2 present is preferably withdrawn from the snow chamber before or during compression.
  • the snow chamber is designed at least in a partial area so that its cross section increases in the direction of the die.
  • the CO 2 snow is compressed in this area by the compressor and a dry ice block is formed, the cross section of which at least in this partial area also increases in the direction of the die.
  • the dry ice block is pressed against the inner wall of the snow chamber and forms a pressure-tight seal between the area in front of and behind the dry ice block.
  • An increased pressure therefore prevails on one side of the dry ice block, while atmospheric pressure continues to exist on the other side, on which the inlet for CO 2 into the snow chamber is located.
  • the snow chamber can therefore be refilled with CO 2 snow according to the invention, while solid CO 2 particles can be released through the die into an atmosphere with increased pressure, in particular into a compressed gas stream.
  • the invention thus allows the production of solid CO 2 particles by relaxing liquid CO 2 against atmospheric pressure or against only slightly increased pressure and feeding the generated CO 2 particles into a gas stream at a significantly higher pressure without the need for a pressure lock.
  • the snow chamber is preferably flared at least in a partial area in the direction of the die.
  • a correspondingly conically shaped block of dry ice is created, which is pressed into the snow chamber and seals it if there is increased pressure in front of the die.
  • the snow chamber in another subarea so that its cross section decreases in the direction of the die.
  • the narrowing of the cross-section preferably an even, steady narrowing of the cross-section, supports the compression of the CO 2 snow.
  • a further improvement in the density and hardness of the CO 2 particles is achieved by tapering the openings in the die, so that the dry ice pressed through the die is compressed again.
  • the openings of the die preferably open into one Flow chamber through which a stream of compressed gas flows and entrains the CO 2 particles emerging from the die.
  • the CO 2 particles emerging from the die are advantageously fed into an air stream at a pressure between 2 and 20 bar, preferably between 5 and 10 bar.
  • the CO 2 snow in the snow chamber is preferably compacted more than 20 times per minute, particularly preferably more than 40 times per minute, very particularly preferably more than 60 times per minute, and pressed through the die.
  • the continuous cleaning jet generated in this way enables a high cleaning speed, ie it can be moved over the object to be cleaned at a relatively high speed.
  • the cleaning performance is significantly increased compared to pulsed cleaning jets.
  • liquid CO 2 is expanded against atmospheric pressure, resulting in a mixture of approximately equal parts of CO 2 snow and CO 2 gas.
  • the mixture formed during the expansion is preferably separated into CO 2 snow and gaseous CO 2 .
  • This is particularly preferably done by supplying the mixture to a circular line in which gas and snow are separated using centrifugal force.
  • This line is connected with a kind of switch to the inlet for CO 2 into the snow chamber, so that essentially only CO 2 snow is introduced into the snow chamber.
  • the resulting CO 2 gas is then removed from the snow chamber in a suitable manner before the CO 2 snow is compressed.
  • It has also proven advantageous to supply the CO 2 gas / snow mixture to the snow chamber via a line which has a rib structure on the inside, for example a hose with an internal support spiral. As a result, the loose snow particles are already pre-compacted.
  • CO 2 gas, and C0 2 snow as well as possible separated that is, the snow is completely degassed as possible.
  • the subsequent compression process This results in a high density and hardness of the CO 2 particles produced, which in turn have a favorable effect on the cleaning performance.
  • the invention has significant advantages over the known devices and methods for producing solid CO 2 particles.
  • the special design of the snow chamber makes a pressure lock unnecessary. The manufacturing costs can thereby be reduced and a potential source of error is eliminated.
  • the invention also allows the generation of a quasi-continuous CO 2 -
  • the device according to the invention can be started up very quickly within a few seconds. For example, it is possible to generate a cleaning jet with CO 2 pellets within 2 to 4 seconds.
  • the invention can therefore advantageously be integrated into process sequences, so that a corresponding cleaning jet is available very quickly in the event of cleaning requirements. This is particularly advantageous for processes in which cleaning requirements are very irregular and difficult to plan.
  • the invention is preferably integrated into the process sequences in such a way that the cleaning is started automatically.
  • CO 2 particle generation and feed into the compressed gas stream means that separate storage of CO 2 particles, in particular CO 2 pellets, is not necessary, so that problems in the distribution of the CO 2 particles cannot occur at all.
  • the difficulties associated with the storage of the CO 2 particles, for example clumping, are also avoided.
  • the storage of liquid CO 2 is much easier than the handling of solid CO 2 particles.
  • the figure shows a device for producing CO 2 pellets for a pressure jet system.
  • the device according to the invention has a
  • the CO 2 snow is produced by expansion of liquid CO 2 relative to atmospheric pressure, and then separated by 2 gas which is also produced in the relaxation CO.
  • a circular line is provided, in which a separation of gas and snow is achieved due to the centrifugal force.
  • the snow chamber 5 is closed on one end by the compression piston 2 of a compressor and on the opposite side by a die 6.
  • the die 6 has a plurality of openings 10 arranged next to one another, each of which has a conically tapering cross section.
  • Other designs with a tapering cross-section, such as hyperbolic tapering cross-sections, are also cheap.
  • the snow chamber 5 is double-conical in the area 5a, 5b adjoining the die 6.
  • the cross section of the snow chamber 5 increases evenly in the partial area 5a and decreases again in the partial area 5b.
  • the openings 10 of the die 6 open into a flow chamber 11 which has an inlet opening 7 for a compressed air flow and an outlet opening 9 for the compressed air flow loaded with CO 2 pellets.
  • a wedge-shaped projection 8 is provided on the side of the flow chamber 11 opposite the openings 10 of the die 6.
  • CO 2 pellets The production of CO 2 pellets according to the invention is carried out as follows: Liquid C0 2 is expanded in a snow nozzle to atmospheric pressure to give a Mixture of CO 2 snow and gaseous CO 2 forms. The gas-snow mixture is separated and the CO 2 snow is introduced into the snow chamber 5 via the feed 1.
  • the compression piston 2 of the compressor 3 is moved into the position shown in dashed lines in the drawing, whereby the CO 2 snow is pressed into the double-conical area 5a, 5b and compressed. After the compression piston 2 has been brought back to its starting position, new CO 2 snow can be refilled into the snow chamber 5 and then also compressed.
  • Dry ice 4 is produced during the compression of the CO 2 snow. This is pressed through the openings 10 of the die 6 in the compression cycle of the compressor, as a result of which CO 2 strands form.
  • the narrowing design of the openings 10 further compresses the CO 2 strands.
  • the CO 2 strands emerging from the openings 10 strike the wedge-shaped projection 8 and are broken off on impact or by the compressed gas flow flowing through the flow chamber 11 and entrained with the compressed gas flow.
  • the frequency of the compressor is 60 compression cycles per minute, ie 60 strands of CO 2 are pressed through the die 6 per minute. CO 2 pellets 13 are thus fed quasi-continuously into the compressed air stream.
  • a flow of compressed air which has a pressure of 10 bar, flows through the flow chamber 11.
  • the CO 2 pellets 13 produced are entrained by the compressed air flow and fed via a hose line to a jet nozzle, by means of which they are blasted onto the object to be cleaned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

La présente invention concerne un dispositif et un procédé pour produire des particules solides de CO2 (13). Du CO2 liquide est détendu afin de produire un mélange de neige de CO2 et de CO2 gazeux. La neige de CO2 est alors comprimée dans une chambre à neige carbonique (5) pour former un bloc de neige carbonique et passe par compression à travers une matrice (6) qui présente des ouvertures (10). Les particules de CO2 (13) obtenues alimentent un courant de gaz sous pression qui passe au niveau de la matrice (6). Le bloc de neige carbonique (4) isole, du point de vue pression, la chambre à neige carbonique (5) du courant de gaz sous pression.
PCT/EP2003/005643 2002-06-04 2003-05-28 Systeme de projection de neige carbonique WO2003101667A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003238424A AU2003238424A1 (en) 2002-06-04 2003-05-28 Dry ice jet cleaning system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10224778.1 2002-06-04
DE10224778A DE10224778A1 (de) 2002-06-04 2002-06-04 Trockeneisstrahlanlage

Publications (1)

Publication Number Publication Date
WO2003101667A1 true WO2003101667A1 (fr) 2003-12-11

Family

ID=29557529

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/005643 WO2003101667A1 (fr) 2002-06-04 2003-05-28 Systeme de projection de neige carbonique

Country Status (3)

Country Link
AU (1) AU2003238424A1 (fr)
DE (1) DE10224778A1 (fr)
WO (1) WO2003101667A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008144405A1 (fr) * 2007-05-15 2008-11-27 Cold Jet, Llc Procédé de projection de particule et appareil pour celui-ci
DE102008051557A1 (de) 2007-10-31 2009-05-07 Linde Aktiengesellschaft Reinigung von Gegenständen mittels eines Kohlendioxid-Schneestrahlverfahrens
DE102006002653B4 (de) * 2005-01-27 2009-10-08 Luderer Schweißtechnik GmbH Trockeneisstrahlverfahren
DE202011108513U1 (de) 2011-03-14 2012-01-30 Jürgen von der Ohe Vorrichtung zur Herstellung eines Strahlmittels, Vorrichtung zum Strahlen und Strahlmittel
US8187057B2 (en) 2009-01-05 2012-05-29 Cold Jet Llc Blast nozzle with blast media fragmenter
DE102013002636A1 (de) 2013-02-18 2014-08-21 Jürgen von der Ohe Vorrichtung und Verfahren zum Strahlreinigen
DE102013002635A1 (de) 2013-02-18 2014-08-21 Jürgen von der Ohe Verfahren und Vorrichtung zum Kaltstrahlreinigen
CN105500760A (zh) * 2015-12-16 2016-04-20 广州雪熊干冰制造有限公司 颗粒状干冰再压成型方法
US9931639B2 (en) 2014-01-16 2018-04-03 Cold Jet, Llc Blast media fragmenter
WO2019096432A1 (fr) * 2017-11-16 2019-05-23 Alfred Kärcher SE & Co. KG DISPOSITIF POUR FABRIQUER DES PELLETS DE CO2 À PARTIR DE NEIGE CARBONIQUE<sb /> ET APPAREIL DE NETTOYAGE
DE102020000018A1 (de) 2020-01-02 2021-07-08 Jürgen von der Ohe Verfahren und Vorrichtung zur Fertigung eines kryogen-mechanisch wirkenden Strahlmittels, sowie Verfahren und Vorrichtung zum Reinigen von Bauteilen mit dem kryogen-mechanisch wirkenden Strahlmittel
DE102020002085A1 (de) 2020-04-01 2021-10-07 Jürgen von der Ohe Selbst korrigierende Programmsteuerung zur Fertigung eines kryogen-mechanisch wirkenden Strahlmittels, unter Einhaltung einer effektiven Energiebilanz
DE202023002024U1 (de) 2023-04-18 2024-01-04 Jürgen von der Ohe Vorrichtung zum Herstellen eines festen kryogen-mechanisch wirkenden Strahlmittels aus Wasser im Gegenstromverfahren

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008036331B3 (de) * 2008-08-06 2009-11-19 Buse Gastek Gmbh & Co. Kg Strahleinrichtung zum Bestrahlen von zu behandelnden Oberflächen
DE102013113275A1 (de) 2013-11-29 2015-06-03 Alfred Kärcher Gmbh & Co. Kg Vorrichtung zur Herstellung von CO2-Pellets aus CO2-Schnee und Reinigungsgerät
DE102020129723A1 (de) 2020-11-11 2022-05-12 Alfred Kärcher SE & Co. KG Vorrichtung und Verfahren zum Herstellen von CO2-Pellets aus CO2-Schnee und Reinigungsvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576112A (en) * 1968-11-29 1971-04-27 Chemetron Corp Filtering gas from pelletized co{hd 2 {l snow
US5301509A (en) * 1992-07-08 1994-04-12 Cold Jet, Inc. Method and apparatus for producing carbon dioxide pellets
US5525093A (en) * 1993-04-27 1996-06-11 Westinghouse Electric Corporation Cleaning method and apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576112A (en) * 1968-11-29 1971-04-27 Chemetron Corp Filtering gas from pelletized co{hd 2 {l snow
US5301509A (en) * 1992-07-08 1994-04-12 Cold Jet, Inc. Method and apparatus for producing carbon dioxide pellets
US5525093A (en) * 1993-04-27 1996-06-11 Westinghouse Electric Corporation Cleaning method and apparatus

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006002653B4 (de) * 2005-01-27 2009-10-08 Luderer Schweißtechnik GmbH Trockeneisstrahlverfahren
WO2008144405A1 (fr) * 2007-05-15 2008-11-27 Cold Jet, Llc Procédé de projection de particule et appareil pour celui-ci
US9095956B2 (en) 2007-05-15 2015-08-04 Cold Jet Llc Method and apparatus for forming carbon dioxide particles into a block
DE102008051557A1 (de) 2007-10-31 2009-05-07 Linde Aktiengesellschaft Reinigung von Gegenständen mittels eines Kohlendioxid-Schneestrahlverfahrens
US8187057B2 (en) 2009-01-05 2012-05-29 Cold Jet Llc Blast nozzle with blast media fragmenter
DE202011108513U1 (de) 2011-03-14 2012-01-30 Jürgen von der Ohe Vorrichtung zur Herstellung eines Strahlmittels, Vorrichtung zum Strahlen und Strahlmittel
DE102011119826A1 (de) 2011-03-14 2012-09-20 Jürgen von der Ohe Verfahren zur Herstellung eines Strahlmittels, Verfahren zum Strahlen, Strahlmittel, Vorrichtung zur Herstellung eines Strahlmittels, Vorrichtung zum Strahlen
WO2012123098A1 (fr) 2011-03-14 2012-09-20 Von Der Ohe Juergen Procédé de fabrication d'un abrasif, procédé de sablage, abrasif, dispositif de fabrication d'un abrasif, dispositif de sablage
DE102013002635A1 (de) 2013-02-18 2014-08-21 Jürgen von der Ohe Verfahren und Vorrichtung zum Kaltstrahlreinigen
DE102013002636A1 (de) 2013-02-18 2014-08-21 Jürgen von der Ohe Vorrichtung und Verfahren zum Strahlreinigen
US9931639B2 (en) 2014-01-16 2018-04-03 Cold Jet, Llc Blast media fragmenter
CN105500760A (zh) * 2015-12-16 2016-04-20 广州雪熊干冰制造有限公司 颗粒状干冰再压成型方法
WO2019096432A1 (fr) * 2017-11-16 2019-05-23 Alfred Kärcher SE & Co. KG DISPOSITIF POUR FABRIQUER DES PELLETS DE CO2 À PARTIR DE NEIGE CARBONIQUE<sb /> ET APPAREIL DE NETTOYAGE
DE102020000018A1 (de) 2020-01-02 2021-07-08 Jürgen von der Ohe Verfahren und Vorrichtung zur Fertigung eines kryogen-mechanisch wirkenden Strahlmittels, sowie Verfahren und Vorrichtung zum Reinigen von Bauteilen mit dem kryogen-mechanisch wirkenden Strahlmittel
DE102020002085A1 (de) 2020-04-01 2021-10-07 Jürgen von der Ohe Selbst korrigierende Programmsteuerung zur Fertigung eines kryogen-mechanisch wirkenden Strahlmittels, unter Einhaltung einer effektiven Energiebilanz
DE202023002024U1 (de) 2023-04-18 2024-01-04 Jürgen von der Ohe Vorrichtung zum Herstellen eines festen kryogen-mechanisch wirkenden Strahlmittels aus Wasser im Gegenstromverfahren

Also Published As

Publication number Publication date
DE10224778A1 (de) 2003-12-18
AU2003238424A1 (en) 2003-12-19

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