EP2782711B1 - Vorrichtung mit einem luftkasten zur abgabe von strahlen aus einer kryogenen flüssigkeit - Google Patents

Vorrichtung mit einem luftkasten zur abgabe von strahlen aus einer kryogenen flüssigkeit Download PDF

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Publication number
EP2782711B1
EP2782711B1 EP12787811.4A EP12787811A EP2782711B1 EP 2782711 B1 EP2782711 B1 EP 2782711B1 EP 12787811 A EP12787811 A EP 12787811A EP 2782711 B1 EP2782711 B1 EP 2782711B1
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Prior art keywords
fluid
jets
cryogenic
nozzle
jet
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EP12787811.4A
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English (en)
French (fr)
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EP2782711A1 (de
Inventor
Jacques Quintard
Frédéric Richard
Charles Truchot
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LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
    • 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
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/086—Descaling; Removing coating films
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0396—Involving pressure control
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85938—Non-valved flow dividers

Definitions

  • the invention relates to a device for dispensing cryogenic fluid jets as well as an installation and a working method using said jets, in particular jets of liquid nitrogen, under high pressure, in particular an installation and a method.
  • surface treatment, pickling, cleaning or peeling, coated or uncoated materials such as metals, concrete, wood, polymers, ceramics and plastics or any other type of material.
  • the surface treatment of coated or uncoated materials is essentially by sanding, by projection of ultra high pressure water (UHP), sander, jackhammer , at the shredder or by chemical means.
  • UHP ultra high pressure water
  • Document is known WO-2010/119201 a device for dispensing one or more jets of cryogenic fluid according to the preamble of claim 1.
  • cryogenic jets under very high pressure are used at a pressure of 300 to 4000 bar and at a cryogenic temperature of, for example, between -100 and -200 ° C., typically about-140 and -160 ° C., which are distributed by one or more nozzles animated or not with a rotary movement.
  • a jet of cryogenic fluid typically has a maximum coherence length of the order of 15 to 18 cm.
  • coherence length is meant the length of the jet of cryogenic fluid on which the jet remains sufficiently concentrated to be visible after its escape through the nozzle.
  • the effective length of a cryogenic fluid jet is also a very important feature as it corresponds to the maximum distance from the ejection nozzle beyond which the jet is no longer sufficiently concentrated to maintain its treatment efficiency. surface, pickling, cleaning or peeling the treated material.
  • the effective length is therefore less than or equal to the jet coherence length which is the visible jet length.
  • the greater the effective length of the jet the more efficient the working method is at equal distance between the nozzle and the treated substrate, and the more the process gains in yield, said yield corresponding for example, in the case from a concrete peeling process, to the volume of concrete crushed per unit of time.
  • the surface of the treated material is, relative to the outlet of the jet distribution nozzle, at a distance less than or equal to the effective length and therefore less than the coherence length of said jet.
  • This effective jet length is in some cases, that is to say according to the working method considered, low, that is to say of the order of a few centimeters and typically between 5 and 15 mm for a jet of cryogenic fluid at a pressure of the order of 3500 bar distributed by a nozzle with a diameter of the order of 300 microns.
  • the positioning tolerance of the jet distribution nozzle relative to the surface of the treated material is then problematic.
  • the areas of treated material located at these defects or depressions are at a greater distance from the exit of the nozzle, to which the jet has lost all or part of its effectiveness, which leads to a less efficient working method on these areas.
  • the working method is then less reliable, which is critical for certain applications, such as the cleaning of contaminated parts in a nuclear environment, for which the least pollution residue is not acceptable.
  • an effective length of the jet insufficient makes it very difficult, if not impossible, a working method performed on a part in which machining such as ducts or wakes are practiced.
  • the problem posed is then even more critical because the bottom of the duct or treated wake can be located beyond the effective length of the jet, and therefore out of reach, thus making the work process very inefficient, even inefficient, in this area.
  • the treated part that is to say the exchanger, itself consists of parts some of which are located more than 20 cm from the circumference of said exchanger, and that it must be possible to clean, which is not possible with the jets of cryogenic fluid of the prior art.
  • the problem to be solved is therefore to propose a method of working by jets of improved cryogenic fluid, that is to say for which the disadvantages related not only to the length of coherence, but also to the effective length, limited jets no longer exist or are greatly reduced, and thus making it more reliable and more efficient the working method implementing said jets.
  • the object of the present invention is to provide a method for operating more efficiently and with a better yield the surface treatment, pickling, cleaning or peeling of the coated or uncoated materials, such as metals, the concrete, wood, polymers, ceramics and plastics or any other type of material, in particular a material whose surface has unevenness, unevenness or a part in which machining is carried out, or a room itself made of hard to reach parts.
  • the coated or uncoated materials such as metals, the concrete, wood, polymers, ceramics and plastics or any other type of material, in particular a material whose surface has unevenness, unevenness or a part in which machining is carried out, or a room itself made of hard to reach parts.
  • the solution of the invention is then a device for dispensing one or more jets of cryogenic fluid comprising a fluid supply pipe supplying one or more fluid distribution nozzles arranged downstream of said pipe, the supply pipe fluid having a fluid passage section of a first diameter, characterized in that it further comprises at least one plenum chamber arranged between the fluid supply pipe and the fluid distribution nozzle or nozzles, being fluidly connected to said fluid supply pipe and to the or at the fluid distribution nozzles, each plenum having a fluid passage section having a second diameter greater than the first diameter of the fluid passage section of the fluid supply pipe.
  • the device of the invention then makes it possible to dispense one or more jets of cryogenic fluid with increased coherence length, typically at least 19 cm, preferably greater than or equal to 20 cm, and this, with an effective length also increased, and capable of even achieve in some cases the same values, compared to a device according to art prior not provided with such a plenum, all other conditions being equal.
  • the present invention thus makes it possible to solve the problems described above by proposing a device able to increase not only the coherence length of the cryogenic fluid jets distributed and used for a working method, but also to increase the effective length of said jets. .
  • the invention relates to a treatment plant with one or more jets of cryogenic fluid comprising a cryogenic fluid source at high pressure fluidically connected to a fluid supply pipe supplying one or more distribution nozzles of a or several jets of fluid at high pressure cryogenic temperature, characterized in that it further includes a device according to the invention.
  • the invention relates to a working method using one or more jets of cryogenic fluid distributed by means of a device according to the invention for producing, by means of one or more jets of cryogenic fluid under pressure, surface treatment, stripping, cleaning or peeling of a material.
  • the jets or cryogenic fluid distributed by the fluid distribution nozzle or nozzles have a temperature below -140 ° C and a pressure of at least 300 bar.
  • the cryogenic fluid used is liquid nitrogen.
  • the treated part is a heat exchanger.
  • the treated part preferably has at least one characteristic dimension greater than or equal to 20 cm.
  • the Figure 1 schematizes a device for dispensing a jet of cryogenic fluid 6 comprising a pipe 1 for supplying a fluid (arrow 7), the fluid passage section of which has a diameter d, feeding a nozzle 5 of fluid distribution arranged downstream of said pipe 6.
  • the diameter d is the inside diameter of the pipe 1.
  • the fluid 7 is a cryogenic fluid at high pressure emanating from a source of fluid (not shown), such as a compressor, a tank, a heat exchanger, a feed line, a gas cylinder or the like, supplying the fluid. upstream end of the pipe 1 fluid.
  • the pipe 1 is thus fluidly connected to the fluid source 7.
  • this pipe is a tube whose section is advantageously circular in shape.
  • This tube can be made of any type of suitable material, preferably stainless steel for its mechanical properties.
  • the thickness of the wall constituting the pipe 1 is defined so as to withstand the mechanical stresses resulting from the circulation of a cryogenic fluid at high pressure, typically said thickness is of the order of the internal diameter of the pipe, ie the section fluid passage of diameter d.
  • a fluid distribution nozzle 5 is fluidly connected to the pipe 1 so that it distributes a jet of cryogenic fluid 6 whose propagation axis is aligned with the central axis XX of the pipe 1 and the length of which coherence is denoted LC1.
  • the nozzle 5 is connected to the pipe 1 via a UHP type water jet connection 2.
  • the coherence length LC1 typically between 15 and 18 cm, may be insufficient for a number of applications, in particular for treatment of a part made of a material whose surface has unevenness, unevenness, or in which machining is performed, in particular when these machining operations are performed along a dimension of the treated part greater than the LC1 coherence length.
  • this also poses a problem for cleaning applications of heat exchangers, these exchangers being made up of parts that are difficult to access, in particular parts located more than 20 cm from the circumference of the exchanger.
  • a jet of cryogenic fluid 6 is incorporated in a delivery device a jet of cryogenic fluid 6 according to the prior art a so-called plenum chamber 4 capable of increasing the coherence length LC1 of the jet 6 to a length of LC2 consistency higher than LC1.
  • the plenum chamber 4 is arranged between the fluid supply pipe 1 and the fluid distribution nozzle 5.
  • the pipe 1 is fluidly connected to the plenum 4, said chamber being fluidly connected to the nozzle 5 of fluid distribution.
  • plenum chamber a device through which the fluid 7 circulates and capable of laminarizing the flow of said fluid, that is to say capable of making it more laminar or equivalent less turbulent, thanks to the use of a larger fluid passage section than that of the pipe 1 of fluid supply. More specifically, the circulation of the fluid 7 through the plenum 4 will induce a change in the dynamic characteristics of the jet of cryogenic fluid 6 at its outlet from the nozzle 5 by making it less turbulent, i. e. by lowering its Reynolds number. This results in an increase in the coherence length of the jet of cryogenic fluid 6 to a value LC2 greater than the value LC1 of the coherence length of the jet of cryogenic fluid obtained without the device of the invention.
  • the plenum 4 is a part of revolution in which is practiced a circular section of conduit having a fluid passage section of diameter D and length L.
  • the diameter D is the inside diameter of the chamber of 4.
  • the plenum 4 is formed of a material adapted to the passage of a cryogenic fluid under high pressure, preferably stainless steel, preferably type 316 stainless steel.
  • the fluid passage section of the plenum 4 has a diameter D greater than the diameter d of the fluid passage section of the pipe 1 for supplying fluid.
  • the plenum chamber 4 is connected to a fluid supply duct 1 whose internal diameter is 2.1 mm, for example a so-called 1 ⁇ 4 "tube, outer diameter equal to 6.35 mm, the internal diameter D of the chamber is greater than 2.1 mm.
  • the plenum 4 has a fluid passage section with a diameter D of between 2 and 6 mm, preferably between 3 and 5 mm, and a length L of between 20 and 100 mm, preferably between 50 and 70 mm. . These dimensions are adapted according to the intended application and the coherence length of the desired fluid jet 6.
  • a single plenum 4 is directly connected to the end of the pipe 1 of fluid supply by means of a connector 2 and is directly upstream of the nozzle 5 of fluid distribution.
  • the connection between the plenum 4 and the end of the pipe 1 is advantageously provided by a threaded connection.
  • the connection between the plenum 4 and the nozzle 5 is obtained through a tap made in the downstream portion of the plenum 4 and on which the nozzle 5 is screwed.
  • the axis of the plenum 4 is aligned with the axis XX of the pipe 1 for supplying fluid.
  • the device of the invention is able to dispense a jet of single and fixed cryogenic fluid 6 whose coherence length, denoted LC2 on the Figure 2 , is greater than the coherence length LC1 of a jet of fluid dispensed by a device according to the prior art.
  • the dispensing device of one or more jets of cryogenic fluid 6 comprises one or more nozzles 5 distributing one or more jets of cryogenic fluid 6.
  • the nozzle or nozzles 5 are positioned eccentrically, that is to say off-center relative to the axis XX of the pipe 1 for supplying fluid.
  • a nozzle-carrying tool 3 is connected to the end of the pipe 1 for supplying fluid by means of a connection 2.
  • This nozzle-carrying tool 3 then supports one or more stilling chambers 4 arranged between the nozzle holder tool 3 and the fluid delivery nozzle (s) 5.
  • a plenum 4 is arranged upstream of each cryogenic fluid delivery nozzle 5.
  • the device of the invention is thus able to dispense one or more cryogenic fluid jets 6 whose coherence length LC2 is greater than the coherence length LC1 of a jet of fluid distributed by a device according to the prior art.
  • the device for dispensing one or more jets of cryogenic fluid 6 comprises a nozzle-carrying tool 3 provided with means for rotating said tool around the axis XX of the pipe 1 so as to to give a circular movement to the fluid distribution nozzle (s) 5 and to obtain rotary jets (schematized by the arrow 8 on the Figure 3 ).
  • the tool 3 nozzle holder can be rotated by a set of gears, with or without transmission belt, moved by a electric or pneumatic motor via a first shaft or rotational transmission shaft connected to the motor, a box, a housing or a transmission enclosure comprising an internal gearset transmission mechanism and a second rotary shaft or transmission shaft connected in turn to the movable tool 3 provided with the plenums 4 and the nozzles 5.
  • the solution of the invention also relates to a working method implementing a device according to the invention capable of dispensing one or more jets of cryogenic fluid 6, fixed or rotary, the coherence length is increased to achieve a surface treatment, stripping, cleaning or even peeling of a material.
  • the method of the invention is particularly advantageous for carrying out a surface treatment operation or the like of a material or a part whose surface has a flatness defect, asperities or having at least one characteristic dimension of at least 20 cm, that is to say a width, height or length, in which are machined.
  • the solution of the invention is of great interest for the cleaning of large heat exchangers, that is to say at least 40 cm, for which component parts may be more than 20 cm from the circumference of the exchangers.
  • the cryogenic fluid jets or jets used in the working method have a coherence length LC 2 of at least 20 cm.
  • the fluid dispensed by the device of the invention is a fluid at cryogenic temperature and at high pressure, in particular liquid nitrogen at a pressure greater than 1500 bar and at a temperature below 140 ° C.
  • the tests were carried out with jets of liquid nitrogen at a pressure of 3500 bars, a flow rate of 6 l / min and at a temperature of -155 ° C.
  • the cryogenic fluid supply system is a 316L UHP stainless steel tube with an outside diameter of 6.35 mm and an inside diameter d equal to 2.1 mm.
  • the cryogenic fluid jet dispensing device comprises a unique plenum and dispensing nozzle, such as that illustrated in FIG. Figure 2 and does not implement a rotation system of the jet.
  • Example 1 Dispensing nozzle for cryogenic fluid with a diameter of 305 ⁇ m
  • the device for dispensing the jet of cryogenic fluid located downstream of the plenum is a nozzle derived from high-pressure water jet technology equipped with an ejection sapphire whose diameter fluid passage, that is to say the diameter of the outlet orifice, is 305 microns.
  • Table 1 gives the jet coherence lengths obtained during tests carried out with a plenum of length L equal to 60 mm and diameter D equal to 4.2 mm (test No. 1), in comparison with the lengths of coherence. jet obtained during tests carried out in the absence of such a plenum (test No. 2).
  • the arrangement of a plenum chamber according to the invention between the fluid supply pipe and the fluid distribution nozzle actually leads to a coherence length of the cryogenic fluid jet dispensed greater than that obtained. without the device of the invention.
  • Table 2 gives the jet coherence lengths obtained when using a plenum of diameter D equal to 4.2 mm and of different lengths L and Table 3 gives the jet consistency lengths obtained during the use of plenums of different diameters D and length L equal to 60 mm.
  • Table 4 gives the Reynolds numbers of the cryogenic fluid jets obtained during the use of plenums of different diameters D and length L equal to 60 mm.
  • the arrangement of a plenum chamber between the fluid supply pipe and the fluid distribution nozzle, in accordance with the invention effectively leads to coherence lengths of the higher distributed cryogenic fluid jets.
  • the invention also makes it possible to increase the effective length of the jet of cryogenic fluid.
  • the application of the invention is particularly advantageous when the treated part comprises at least one characteristic dimension, that is to say a length, width or height, the said characteristic dimension being of the order 20 cm and more, or when the treated part itself comprises parts located more than 20 cm from the circumference of said treated part.
  • Table 4 shows that the increase in the coherence length of the jet of cryogenic fluid is accompanied by a decrease in the Reynolds number of said jet and therefore a laminarization of said jet, which further demonstrates the interest of the invention to solve the problems mentioned above.
  • the results presented in Tables 2 and 3 show that the increase in the coherence length tends to reach a ceiling value when the diameter D of the plenum increases or when the length of the plenum L increases. It is therefore not necessary to increase indefinitely the dimensions L and D of the plenum, and the dimensions of the chamber are thus reasonable.
  • the diameters and lengths of the plenum chamber (s) will therefore be adjusted so that the fluid passage section D has a diameter of between 2 and 6 mm. that the length L of said section is between 20 and 100 mm.
  • the diameter D of the fluid passage section of the plenum is preferably preferably between 3 and 5.
  • the length L of the fluid passage section of the plenum is preferably between 50 and 70 mm, so as to distribute one or more jets of cryogenic fluid having an LC2 consistency length of at least 20 cm .
  • these dimensions make it possible to maintain a device for dispensing one or more jets of cryogenic fluid remaining of reasonable size, so that it can easily be used in an industrial working installation using the fluid jet or jets. cryogenic distributed. ⁇ u> Table 1 ⁇ / u> 305 ⁇ m ejection diameter Test N ° 1 - Invention Test No.
  • Example 2 Cryogenic fluid dispensing nozzle with a diameter of 432 ⁇ m
  • a second series of tests was carried out, under the same conditions as above, but this time with a nozzle provided with an ejection sapphire whose fluid passage diameter is 432 ⁇ m, the objective being to verify that the results obtained previously remain valid with an ejection nozzle of characteristics different from the first.
  • Table 5 gives the jet coherence lengths obtained when using a plenum of diameter D equal to 4.2 mm and of different lengths L.
  • Table 6 gives the jet coherence lengths obtained during the measurement. use of plenums of different diameters D and length L equal to 60 mm.
  • the diameter D of the fluid passage section of the plenum is preferentially preferably between 3 and 5 mm, and the length L of the fluid passage section of the plenum is preferably between 50 and 70 mm, so as to distribute one or more jets of cryogenic fluid having a coherence length LC2 at least 20 cm.
  • the jet coherence length is greater than with a nozzle with an ejection diameter of 305 ⁇ m and this, for the same plenum chamber. Indeed, with a larger ejection diameter, the flow rate at constant pressure is greater, which leads to a longer jet coherence length.
  • the method of peeling is carried out with liquid nitrogen at a pressure of the order of 3500 bar, a temperature of the order of -153 ° C. and a flow rate of about 71 / min.
  • the liquid nitrogen is distributed by a single nozzle, whose ejection diameter is 330 microns, rotated at a speed of about 1400 revolutions / min using a nozzle-holder tool provided with rotating said tool around the axis of the fluid supply pipe, so as to give circular movement to the fluid distribution nozzle.
  • the nozzle holder moves at a speed of about 130 cm / min.
  • a detailed description of this rotation tool is made in the document WO-2011010030 .
  • the crushed material is fine-grained and homogeneous concrete, a typical application of which is the formation of garden edging.
  • the structure of this concrete favors the realization of comparative measurements.
  • the nozzle distributing the liquid nitrogen is positioned at a distance of about 10 mm from the surface of the treated concrete.
  • Table 7 presents a comparison of the results obtained during the peeling of the concrete according to the prior art, that is to say without a plenum (Test No. 3), and with a device according to the invention, that is to say with a plenum, the chamber used having a length L of 60 mm and a diameter D of 4.2 mm (Test No. 4).
  • the invention makes it possible to increase the effective length of the jet to a value of between 15 to 20 mm, typically at least 17 mm, compared with an effective length of between 5 and 15 ⁇ m. mm, typically less than 13 mm, without still room.
  • the invention also makes it possible to increase the volume of concrete crushed per unit of time. In general, the use of the invention leads to a gain of about 260% in the concrete peeling performance.
  • the main application of the present invention is a method of surface treatment, pickling, cleaning or peeling of coated or uncoated materials, such as metals, concrete, wood, polymers, ceramics and plastics or any other type of material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Cleaning In General (AREA)

Claims (13)

  1. Vorrichtung zur Abgabe von einem oder von mehreren Strahlen aus kryogenem Fluid (6), umfassend einen Kanal (1) zur Zufuhr von Fluid, der eine oder mehrere Düsen (5) zur Abgabe von Fluid versorgt, die vorgelagert von dem Kanal angeordnet sind, wobei der Kanal (1) zur Zufuhr von Fluid einen Abschnitt zum Durchgang von Fluid mit einem ersten Durchmesser (d) aufweist,
    dadurch gekennzeichnet, das sie außerdem mindestens eine Beruhigungskammer (4) umfasst, die zwischen dem Kanal (1) zur Zufuhr von Fluid und der oder den Düse(n) (5) zur Abgabe von Fluid angeordnet ist, in dem sie fluidisch mit dem Kanal (1) zur Zufuhr von Fluid und mit der oder den Düse(n) (5) zur Abgabe von Fluid verbunden ist, wobei jede Beruhigungskammer ausgelegt ist, um den Abfluss des Fluids, das durch die Beruhigungskammer zirkuliert, zu laminarisieren und einen Abschnitt zum Durchgang von Fluid umfasst, der einen zweiten Durchmesser (D) aufweist, der größer als der erste Durchmesser (d) des Abschnitts zum Durchgang von Fluid des Kanals (1) zur Zufuhr von Fluid ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Beruhigungskammer (4) einen Abschnitt zum Durchgang von Fluid mit einem Durchmesser (D) aufweist, der zwischen 2 und 6 mm, vorzugsweise zwischen 3 und 5 mm liegt.
  3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Beruhigungskammer (4) eine Länge (L) aufweist, die zwischen 20 und 100 mm, vorzugsweise zwischen 50 und 70 mm liegt.
  4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Beruhigungskammer (4) aus einem Material gebildet ist, das an die kryogenen Temperaturen angepasst ist, vorteilhafterweise aus rostfreiem Stahl, vorzugsweise aus rostfreiem Stahl vom Typ 316 oder 316L
  5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie eine einzige Beruhigungskammer (4) umfasst, die direkt mit dem Ende des Kanals (1) zur Zufuhr von Fluid mit Hilfe eines Verbindungsstücks (2) verbunden ist.
  6. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sie außerdem ein Düsenhalter-Werkzeug (3) umfasst, das mit dem Ende des Kanals (1) zur Zufuhr von Fluid mit Hilfe eines Verbindungsstücks (2) verbunden ist, wobei das Düsenhalter-Werkzeug (3) mindestens eine Beruhigungskammer (4) trägt, die zwischen dem Düsenhalter-Werkzeug (3) und der oder den Düse(n) (5) zur Abgabe von Fluid angeordnet ist.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sie außerdem ein Düsenhalter-Werkzeug (3) umfasst, das mit Mitteln zur Rotation des Düsenhalter-Werkzeugs (3) um die Achse (XX) des Kanals (1) zur Zufuhr von Fluid ausgestattet ist, um der oder den Düse(n) (5) zur Abgabe von Fluid eine kreisförmige Bewegung zu verleihen.
  8. Anlage zur Behandlung durch einen oder mehrere Strahlen aus kryogenem Fluid, umfassend eine Fluidquelle mit kryogener Temperatur unter hohem Druck, die fluidisch mit einem Kanal (1) zur Zufuhr von Fluid verbunden ist, der eine oder mehrere Düse(n) (5) zur Abgabe von einem oder von mehreren Strahlen aus Fluid mit kryogener Temperatur unter hohem Druck versorgt, dadurch gekennzeichnet, dass sie außerdem eine Vorrichtung nach Anspruch 1 bis 7 umfasst.
  9. Arbeitsverfahren, das ein oder mehrere Strahlen aus kryogenem Fluid (6) anwendet, die mit Hilfe einer Vorrichtung nach einem der Ansprüche 1 bis 7 oder einer Anlage nach Anspruch 8 abgegeben werden, um mit Hilfe von einem oder von mehreren Strahlen aus kryogenem Fluid (6) unter Druck eine Oberflächenbehandlung, eine Ablösung, eine Reinigung und eine Schälung durchzuführen.
  10. Arbeitsverfahren nach Anspruch 9, dadurch gekennzeichnet, dass der oder die Strahlen aus kryogenem Fluid (6), die von der oder den Düsen(n) zu Abgabe von Fluid (5) abgegeben werden, eine Temperatur von weniger als -140 °C und einen Druck von mindestens als 300 bar aufweisen.
  11. Arbeitsverfahren nach einem der Ansprüche 9 oder 10, dadurch gekennzeichnet, dass das angewendete kryogene Fluid flüssiger Stickstoff ist.
  12. Arbeitsverfahren nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass das behandelte Stück ein Wärmetauscher ist.
  13. Arbeitsverfahren nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, dass das behandelte Stück mindestens eine charakteristische Abmessung von mehr als oder gleich 20 cm aufweist.
EP12787811.4A 2011-11-24 2012-10-23 Vorrichtung mit einem luftkasten zur abgabe von strahlen aus einer kryogenen flüssigkeit Active EP2782711B1 (de)

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FR1160727A FR2983106B1 (fr) 2011-11-24 2011-11-24 Dispositif de distribution de jets de fluide cryogenique a chambre de tranquillisation
PCT/FR2012/052432 WO2013076395A1 (fr) 2011-11-24 2012-10-23 Dispositif de distribution de jets de fluide cryogénique à chambre de tranquillisation

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EP2782711B1 true EP2782711B1 (de) 2016-09-14

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EP3330660B1 (de) * 2016-11-30 2019-04-24 AIC GmbH Vorrichtung, verwendung und verfahren zur reinigung von kühlturmeinbauten
KR102341398B1 (ko) 2018-01-18 2021-12-17 가부시키가이샤 아이에이치아이 라이닝재 박리 방법
MX2021006853A (es) * 2018-12-17 2021-09-14 Cryoconcepts Lp Dispositivo de modulación de flujo para dispensar fluidos presurizados.
JP7343387B2 (ja) * 2019-12-26 2023-09-12 荏原環境プラント株式会社 清掃装置システム及び清掃方法

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FR2983106B1 (fr) 2014-01-10
JP2015505719A (ja) 2015-02-26
FR2983106A1 (fr) 2013-05-31
CN103958127A (zh) 2014-07-30
WO2013076395A1 (fr) 2013-05-30
EP2782711A1 (de) 2014-10-01
US10180294B2 (en) 2019-01-15
US20140352794A1 (en) 2014-12-04

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