EP2618070A1 - Dispositif de chauffage au gaz, installation de chauffage au gaz et dispositif de pulvérisation thermique avec procédé associé - Google Patents

Dispositif de chauffage au gaz, installation de chauffage au gaz et dispositif de pulvérisation thermique avec procédé associé Download PDF

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Publication number
EP2618070A1
EP2618070A1 EP20120002883 EP12002883A EP2618070A1 EP 2618070 A1 EP2618070 A1 EP 2618070A1 EP 20120002883 EP20120002883 EP 20120002883 EP 12002883 A EP12002883 A EP 12002883A EP 2618070 A1 EP2618070 A1 EP 2618070A1
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EP
European Patent Office
Prior art keywords
gas
heating
heating device
arrangement
gas stream
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.)
Withdrawn
Application number
EP20120002883
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German (de)
English (en)
Inventor
Kurt Binder
Frank Dr. Gärtner
Alexander List
Thomas Prof. Dr. Klassen
Norbert Németh
Heinrich Prof. Dr. Kreye
Peter Heinrich
Werner Krömmer
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 EP2618070A1 publication Critical patent/EP2618070A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/1606—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air
    • B05B7/1613—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/145—Carbon only, e.g. carbon black, graphite
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material

Definitions

  • the present invention relates to a gas heating device, a gas heater and a thermal spraying device and an associated method according to the preambles of the independent claims.
  • Cold gas spraying is known.
  • metallic spray particles from 1 to 250 ⁇ m are accelerated in a gas stream to speeds of 200 to 1600 m / s and sprayed onto a substrate.
  • a Laval nozzle is usually used.
  • the spray particles are not melted before.
  • a coating is formed by plastic deformation.
  • a minimum impact velocity, the so-called critical speed which depends inter alia on the nature and the temperature of the spray particles, must be exceeded.
  • the spray particles By heating the gas flow, the spray particles can also be heated. This leads to thermal softening and ductilization, which reduces the critical velocity. By heating, the speed of sound of the gas, and thus the flow velocity in the nozzle, and thus also the speed of the spray particles upon impact, can be increased. By increasing the temperature of the gas flow so that both the temperature and the speed of the spray particles is increased upon impact. Both have a positive effect on the order efficiency and coating quality. Although the temperature of the gas stream during cold gas spraying remains below the melting temperature of the spray particles, ie, a "cold" gas stream is used in comparison with other spraying methods, the gas stream is therefore also heated during cold gas spraying.
  • the gas pressure which can likewise be increased to increase the speed of the spray particles, is usually limited to 30 to 50 bar in terms of plant technology.
  • Gases, such as nitrogen commonly used in cold gas spraying, are often introduced into the nozzle at a temperature of a few hundred degrees Celsius. there It may be necessary to cool the steel or carbide nozzles.
  • a gas is e.g. heated by being heated by an elongated coil-shaped resistively heated tube of refractory material, e.g. a nickel alloy such as Inconel.
  • filament heaters can be used.
  • thin wires made of a heat-resistant metal alloy for example made of Kanthal (a Fe-Cr-Al alloy) shaped into heating coils, are arranged in a larger number of parallel aligned ceramic tubes.
  • the wires are usually heated resistively.
  • the gas to be heated is passed through the ceramic tubes and flows along the outside of the heated wires.
  • the DE 10 2005 053 731 A1 discloses a corresponding filament heater with heat insulation.
  • the present invention proposes a gas heating device, a gas heating device and a thermal spraying device and a corresponding method with the features of the independent patent claims.
  • Preferred embodiments are subject of the dependent claims and the following description.
  • a heating device for heating a gas stream in particular a device or device for thermal spraying and especially a cold gas spraying device, is proposed which has a graphite felt that can be heated with an electric heating current and can be flowed through with the gas stream.
  • the heating element consists of graphite.
  • Graphite is heat-resistant at temperatures up to 2200 ° C under oxygen-free conditions, such as those present in corresponding spray processes.
  • this problem is solved by the already mentioned use of the graphite felt.
  • a device for heating a gas stream, in particular for high-pressure gas heating created, which can operate at high pressures and at high temperatures.
  • temperatures to which the gas is heated of over 1000 ° C, even more than 1200 ° C and even more than 1500 ° C possible.
  • the device according to the invention is suitable for heating nitrogen to temperatures of significantly more than 1000 ° C., for example during cold gas spraying. Due to the material, the upper limit for heating is around 2000 ° C.
  • gases nitrogen and helium and their mixture are used with particular advantages. However, it is also possible to use other gases and gas mixtures, such as argon or other gas mixtures containing no oxygen.
  • Graphite felts are made of thin filaments of graphite, which touch together in a knot. If, with suitable contacting, an electrical voltage is applied to a graphite felt, a current flows despite the interruption of the filaments, because it can also spread over the contact points of the filaments. Therefore, a graphite felt heats up in its entirety in the passage of current and can therefore heat a gas flowing through the graphite felt. Because the graphite fibers in the graphite felt are very thin, the surface over which the heat is transferred to the gas is very large overall.
  • the surface is at least 10 to 100 times the heating surface of currently conventional heaters, e.g. on the inner surface of a resistance heated tube or on the filaments of a filament heater.
  • a heating device has at least two channels through which the gas stream can flow and which are filled with the graphite felt which can be heated by a heating current. This allows a corresponding Gas flow are selectively brought into contact with the graphite felt and the heating current unfold their maximum effect.
  • the targeted admission of the flow-through channels can, as also explained in more detail below, be achieved in that gas distribution devices are arranged in an inflow region of a corresponding heating device. These may for example consist of double cones, perforated discs, gratings, guide plates or diverging inlet sections.
  • a flow distribution element may be formed simultaneously as a contact device and / or Komprimier Modell. By providing multiple channels, an optimized gas flow can be effected.
  • said channels can be arranged at least partially coaxially and / or formed as ceramic tubes.
  • exchangeable heating channels can also be produced which, for example in the form of a heating cartridge, can be inserted into a pressure chamber of a heating device.
  • Corresponding heating devices can be maintained particularly well, wherein an exchange can be made in the event of wear and / or contamination of the graphite felt.
  • a corresponding heating device advantageously has contact devices for selectively contacting the channels with the heating current.
  • the contact devices can be designed, for example, as solid graphite plates with corresponding channels or hole arrangements, which thus simultaneously constitute flow distribution elements.
  • corresponding contact devices can hold and / or compress a graphite felt in the channels through which the gas stream can flow.
  • a corresponding heater further advantageously has means for providing a DC, rotary or alternating current heating current.
  • this can be a suitable rotary or alternating current connection.
  • An AC or high frequency heating may also be advantageous in certain applications.
  • a corresponding heating device advantageously has at least one compression structure to improve its efficiency, which can cause a compression of the graphite felt when acted upon by the gas flow.
  • this may be a perforated plate, which is arranged upstream of the graphite felt in a cylindrical heater. This is provided with holes which are dimensioned such that the perforated plate opposes the gas flow a certain resistance. If such a perforated plate flows through, it presses on the graphite felt and compresses it. This allows better electrical contact between the filaments of the graphite felt and between the graphite felt and the contact means. On the other hand, this can increase the flow resistance that is exerted by the graphite felt on the gas stream, which results in a longer residence time of the gas flow in the graphite felt and thus a more effective heat transfer result.
  • the heating device can also identify a substantially rigid framework, in which the graphite felt is introduced. When exposed to the gas flow of this rigid framework then ensures that the Kompremierung the graphite felt is prevented or at least greatly reduced, since the rigid framework, the graphite felt support and structure.
  • a rigid framework in particular a ceramic framework is suitable.
  • the heating device is advantageously designed as part of a heating device for heating a corresponding gas stream which has a pressure vessel through which the gas stream can flow.
  • the heater In the pressure vessel, the heater is arranged and is flowed through by the gas stream.
  • the heater can also be removed from the pressure vessel and / or replaced accordingly.
  • the pressure vessel advantageously has insulation on its inside. However, the insulation may also be attached to the heating device.
  • a corresponding gas distribution device, in particular with the said flow distribution elements, can be formed as part of the heating arrangement. In this way, it can be accomplished that a corresponding heating device flows through the gas flow in a particularly homogeneous manner. This ensures a particularly uniform and effective gas heating.
  • a corresponding heating arrangement thus also advantageously has at least one insulation, as for example from the DE 10 2005 053 731 A1 is known.
  • a temperature of the pressure vessel on its outer surface relative to the hot gas to, for example, 60% of the gas temperature, preferably reduced to less than 40% and with appropriate design less than 20% of the gas temperature, so that there is an improved handling of corresponding devices.
  • waste heat losses are reduced.
  • An arrangement for thermal spraying in particular for cold gas spraying, profits in the same way from the advantages of the described heating device and / or the heating arrangement.
  • Such an arrangement for thermal spraying comprises a spraying device, a particle feed and a gas feed, wherein the gas feed comprises at least one heating device and / or at least one heating device, as explained above.
  • An apparatus for cold gas spraying, in which the Schuvorroplasty invention and heating arrangement can be used, includes, for example, the WO 2007/110134 ,
  • a corresponding method for thermal spraying is characterized by the use of a corresponding cold gas spraying device, at least one of the described heating devices and / or at least one of the described arrangements.
  • a gas stream can be heated to a temperature of at least 700 to 2000 ° C, in particular to 800 to 1500 ° C.
  • the heating can be carried out at a pressure of up to 100 bar, in particular at 30 to 60 bar.
  • the gas stream can be provided in a volume flow of 50 to 400 m 3 / h, in particular from 60 to 200 m 3 / h. In the process, gas velocities of up to 2500 m / s are achieved.
  • gas temperatures in particular of more than 1100 ° C, the spectrum of materials can be significantly extended, which can be processed by cold gas spraying to high-quality layers and structures.
  • the impact velocity reaches the material-specific critical velocity required for adhesion. High application efficiencies can be achieved if this speed is exceeded by 20 or 30% or more. If further advantageous properties are desired, such as impermeability to gases or liquids (which is a prerequisite for high corrosion resistance) or a high mechanical strength under static and / or dynamic stress, the impact velocity should be as high as 50% or more exceed more.
  • Higher gas temperatures not only extend the spectrum of materials that can be processed into layers and structures by means of cold gas spraying, but also improve the quality of corresponding layers and structures. Another advantage of higher temperatures is that even coarser particles than before can be used for spraying, which also has a favorable effect on the properties of the layers and causes lower costs.
  • Materials which benefit in a particular way from the measures of the invention are metals such as titanium, nickel and iron and their alloys and composites of hard materials and metal matrices with high hard material contents of up to 60% by volume, in some cases up to 80%.
  • Examples of spray materials which theoretically have a great application potential, but whose critical speed is so high that conventionally no high-quality layers with high application efficiency could be produced are nickel, nickel alloys such as Inconel, high-alloy steels or metals with a high melting point and especially molybdenum and molybdenum alloys.
  • Such Materials can now be processed by using the gas heater according to the invention also by cold gas spraying.
  • Foglich can be processed with the invention temperature-resistant materials, including also heat-resistant alloys.
  • molybdenum, niobium and nickel alloys may be mentioned here.
  • high-quality layers can be produced, which are comparable in their properties with molten metal or by sintering produced solid material of the same composition.
  • An arrangement according to the invention which has a corresponding graphite heating, can advantageously also be equipped with a spray nozzle which has a graphite material.
  • graphite material also encompasses all graphite modifications, in particular so-called glassy carbon.
  • a graphite material offers a number of advantages in the stated field of application, which permit, in particular in combination, the explained significantly elevated temperatures.
  • a graphite material has the advantage that it prevents caking of correspondingly hot spray particles on the nozzle inner wall.
  • a solid material in the preferred case of graphite has the advantage that its heat conduction properties can be effective in a particular way.
  • a corresponding nozzle can therefore dissipate heat particularly effectively.
  • a nozzle can be used which has glassy carbon as the graphite material.
  • Glassy carbon also referred to as vitreous carbon, combines glassy ceramic properties with those of graphite and thus offers particular advantages.
  • metallic, partially or all-ceramic spray nozzles and / or spray nozzles with appropriate inserts e.g. Ceramic nozzles with graphite inserts or metal nozzles with ceramic inserts may be advantageous.
  • the respective materials can also be applied in the form of coatings, which compared to solid materials enables a particularly cost-effective production.
  • An insert or an insert made of a corresponding material for example ceramic, graphite or glassy carbon, can be easily replaced, for example, when worn.
  • graphite materials can also be in the form of composite materials be used. These may be materials based on metals and / or plastics.
  • Such an arrangement may, in addition to the illustrated graphite heating also have other heating devices, for example, for preheating the gas stream.
  • a usable gas heater is eg in the EP 0 924 315 B1 disclosed.
  • the gas or gas mixture used is stored in a gas pressure vessel and is temporarily stored in a gas buffer vessel. After removal from the gas buffer container, the gas or gas mixture is heated by means of an electrical resistance heater, inductive and / or by means of a plasma torch.
  • a sufficiently strong heating can also by the use of several heaters, especially pre and post heaters as in DE 10 2005 004 117 disclosed be achieved.
  • the heating device according to the invention and the heating arrangement according to the invention can also be used for other applications in which a hot gas jet is used, for example for preheating during welding and brazing (for example by means of an arc or flame), for preheating during straightening or similar processes, for example Soldering itself (if a solder is used, which melts in the hot gas jet) or for drying hydrogen-sensitive materials.
  • FIG. 1 a device for heating a gas stream according to a particularly preferred embodiment of the invention is shown in longitudinal section and indicated generally at 10.
  • a gas stream is symbolized by bold arrows and denoted by G.
  • the device 10 has a graphite felt 11 through which the gas flow G can flow.
  • the graphite felt 11 is arranged in corresponding channels 12 and 13, for example in ceramic tubes in a coaxial arrangement.
  • Corresponding means 14 for providing a heating current are provided and in FIG. 1 illustrated as DC source.
  • the means 14 for providing the heating current can act on the graphite felt 11 via contact devices 15 to 17 with a heating current.
  • the inventive concept was realized using a graphite felt with fibers having a diameter of about 15 microns.
  • the thickness / length ratio of the fibers was at least 100: 1, more preferably 1000: 1.
  • the graphite felt had a density of only 0.09 g / cm 3 .
  • the density which is about 1/15 lower than that of solid graphite, is due to the large cavities of the felt.
  • the respective coaxially arranged channels 12, 13 are covered with contact devices 15, 16 in the form of perforated disks or plates for this purpose.
  • the arrangement of the perforated contact means 15, 16 is made FIG. 1b clearly visible.
  • the contact devices 15, 16 have corresponding hole arrangements with holes 18.
  • the contact devices 15, 16 are formed conductive and provided for example in the form of graphite plates.
  • the contact devices 15 and 16 touch each other in the arrangement, as in FIG. 1 a is not shown and are electrically isolated from each other by the wall of the channel 13.
  • the contact device 15 may also be designed as a compression structure. If it is flowed through by a gas stream G, it can exert a pressure on the underlying graphite felt and thus compress it.
  • a second contact device 17 On a second side of the heating device 10, hereinafter referred to as "bottom", there is a second contact device 17, which is also provided with holes arrangements with holes 18.
  • the contact device 17 may be formed as a graphite plate. In contrast to the contact devices 15, 16, the contact device 17 contacts the graphite felt 11 in both channels 12, 13.
  • FIG. 1b shows the arrangement 10 of FIG. 1a in a plan view, ie from the above-described top.
  • the contact means 15, 16 do not contact each other in the arrangement shown, but are separated from each other by the wall of the channel 13.
  • the channels 12, 13 are formed for this purpose, for example, as non-conductive ceramic tubes.
  • the in the FIG. 1b The arrangement shown comprises the essential components of in FIG. 1a illustrated arrangement, the Figure 1b is however partially simplified.
  • FIG. 1c the arrangement 10 is shown in a side view.
  • the line of sight corresponds to that of the FIG. 1 a.
  • the FIG. 1 a corresponding elements not referred to again.
  • a wall of the channel 12 and the plate 17 can be seen.
  • FIG. 2 shows a heating arrangement according to a particularly preferred embodiment of the invention in longitudinal section view.
  • the heating arrangement is a total of 20 denotes and has a previously explained heater 10, whose individual elements will not be described again.
  • the heating device 10 is arranged in a pressure vessel 21 of the heating device 20.
  • the gas stream G flows through the pressure vessel as illustrated by the bold arrows.
  • the gas flow G initially passes through an inflow region 23.
  • the inflow region 23 has a gas distribution device 24 which ensures that the inflowing gas is distributed uniformly over the top side of the heating device 10 and flows in at a homogeneous velocity.
  • the pressure chamber 21 is formed for example as a rotationally symmetrical body and has on its inside an insulation 22.
  • the device 20 according to the invention forms a standardized unit which is easily interchangeable, e.g. in case of repair, or several of which can be arranged one behind the other.
  • the heating device 10 may, as previously explained several times, be designed as easily replaceable heating cartridge. As a result, the heater 10 can be easily replaced alone in case of repair.
  • the gas stream G passes through the pressure vessel 21, being distributed uniformly over the cross-section of the heating device 10 by the gas distribution device 24, which may be in the form of a double cone, for example.
  • the gas distribution device 24 which may be in the form of a double cone, for example.
  • the inside mounted insulation 22 ensures that only a little heat energy is released through the wall of the pressure vessel 21 to the environment.
  • the pressure vessel 21 can therefore be relatively thin-walled and lightweight.
  • the gas flow G has the desired temperature in a gas outlet region 25 and leaves the pressure vessel 21.
  • FIG. 3 an arrangement for cold gas spraying according to a particularly preferred embodiment of the invention is shown and designated 100 in total.
  • the arrangement 100 comprises a spray gun 110, which may be formed in a known manner with a Laval nozzle.
  • the nozzle may comprise a graphite material.
  • a particle feed device 120 can be provided by means of which corresponding spray particles can be supplied to the spray gun 110.
  • a gas feed 130 is provided which comprises a gas reservoir 30. From the gas storage 30, a gas flow in a heating arrangement 20 as previously explained, which has a heater 10, out. It will be understood by those skilled in the art that multiple heaters 20 and / or heaters 10 may be provided to achieve the desired To achieve gas temperature.
  • the correspondingly heated gas stream is likewise supplied to the spray gun 110.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Resistance Heating (AREA)
  • Nozzles (AREA)
EP20120002883 2012-01-17 2012-04-24 Dispositif de chauffage au gaz, installation de chauffage au gaz et dispositif de pulvérisation thermique avec procédé associé Withdrawn EP2618070A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012000817A DE102012000817A1 (de) 2012-01-17 2012-01-17 Gasheizvorrichtung, Gasheizeinrichtung wowie Anordnung zum thermischen Spritzen mit zugehörigem Verfahren

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EP2618070A1 true EP2618070A1 (fr) 2013-07-24

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EP20120002883 Withdrawn EP2618070A1 (fr) 2012-01-17 2012-04-24 Dispositif de chauffage au gaz, installation de chauffage au gaz et dispositif de pulvérisation thermique avec procédé associé

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US (1) US9365918B2 (fr)
EP (1) EP2618070A1 (fr)
DE (1) DE102012000817A1 (fr)

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US11662300B2 (en) 2019-09-19 2023-05-30 Westinghouse Electric Company Llc Apparatus for performing in-situ adhesion test of cold spray deposits and method of employing
US11898986B2 (en) 2012-10-10 2024-02-13 Westinghouse Electric Company Llc Systems and methods for steam generator tube analysis for detection of tube degradation
US11935662B2 (en) 2019-07-02 2024-03-19 Westinghouse Electric Company Llc Elongate SiC fuel elements

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WO2008073113A1 (fr) * 2006-12-15 2008-06-19 Doben Limited Ensemble de chauffage à passages multiples
DE102021200421A1 (de) 2021-01-18 2022-07-21 Alethia-Group Gmbh Sprüheinheit und Verfahren zum Aufsprühen eines aus einem Festkörper gewonnenen Materials
CN113280512B (zh) * 2021-04-28 2022-07-19 吉林市富永源化工有限公司 蓄热热水锅炉
US11453511B1 (en) * 2021-07-13 2022-09-27 Beta Air, Llc Systems and methods for data verification at start up
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