EP0066164B1 - Verfahren zum Erwärmen der Oberfläche eines Substrates mittels eines Heissgasstrahls, insbesondere unter gleichzeitiger Zufuhr von Beschichtungsstoff nach dem Flammspritzverfahren und Brenner zur Durchführung des Verfahrens - Google Patents

Verfahren zum Erwärmen der Oberfläche eines Substrates mittels eines Heissgasstrahls, insbesondere unter gleichzeitiger Zufuhr von Beschichtungsstoff nach dem Flammspritzverfahren und Brenner zur Durchführung des Verfahrens Download PDF

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Publication number
EP0066164B1
EP0066164B1 EP82104279A EP82104279A EP0066164B1 EP 0066164 B1 EP0066164 B1 EP 0066164B1 EP 82104279 A EP82104279 A EP 82104279A EP 82104279 A EP82104279 A EP 82104279A EP 0066164 B1 EP0066164 B1 EP 0066164B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
compressed air
deflector
combustion
burner apparatus
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.)
Expired
Application number
EP82104279A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0066164A2 (de
EP0066164A3 (en
Inventor
Felix von Rüling
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.)
Akzo NV
Original Assignee
Akzo NV
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 Akzo NV filed Critical Akzo NV
Priority to AT82104279T priority Critical patent/ATE29113T1/de
Publication of EP0066164A2 publication Critical patent/EP0066164A2/de
Publication of EP0066164A3 publication Critical patent/EP0066164A3/de
Application granted granted Critical
Publication of EP0066164B1 publication Critical patent/EP0066164B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • B05B7/20—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 by flame or combustion
    • B05B7/201—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 by flame or combustion downstream of the nozzle
    • B05B7/205—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 by flame or combustion downstream of the nozzle the material to be sprayed being originally a particulate material

Definitions

  • the invention relates to a method for heating the surface of a substrate by means of a hot gas jet, in particular with simultaneous supply of coating material by the flame spray process, in which the ring-shaped fuel gas to be mixed with combustion air by supplying compressed air in the form of a concentric pump jet with axial flow components in the direction of the surface to be heated is accelerated.
  • the invention further relates to a burner for heating the surface of a substrate, in particular in combination with a spray nozzle for a coating material, consisting of a particularly coaxial nozzle for compressed air with an axial flow component and a ring guide plate surrounding the nozzle at a distance, which has an annular channel with openings at the rear forms for the supply of combustion air, as well as from a fuel gas nozzle ring arranged concentrically in the ring channel, the fuel gas of which is accelerated in the axial direction in the combustion zone by the compressed air emerging from the coaxial nozzle.
  • a spray nozzle for a coating material consisting of a particularly coaxial nozzle for compressed air with an axial flow component and a ring guide plate surrounding the nozzle at a distance, which has an annular channel with openings at the rear forms for the supply of combustion air, as well as from a fuel gas nozzle ring arranged concentrically in the ring channel, the fuel gas of which is accelerated in the axial direction in the combustion zone by the compressed air emerging from
  • the compressed air supplied via the axial nozzle simultaneously transports the coating material in particle form.
  • the pump jet sucks in the compressed air via the ring duct, which is open on the rear.
  • the sucked-in air mixes in the ring channel with the fuel gases supplied via an annular nozzle on the outer edge of the ring channel, so that a flame ring is created that surrounds the central, conical compressed air jet loaded with laminate particles, whereby between this jacket and the conical compressed air jet forms a coat from the sucked air.
  • the hot gas flame jacket heats the surface to be coated and dries it off.
  • the advantages of a method carried out with such a burner are that the coating takes place in a zone of very low air humidity.
  • the heat energy required to dry the surface can be generated and transported quickly enough without the temperature on the transport route becoming too high.
  • Flammable and low-boiling solvents can also be added to the coating material without igniting them when sprayed.
  • the invention has for its object to improve a method and a burner of the type mentioned in performance and flame stability.
  • the improvement in performance and flame stability is based on the multiple acceleration of the hot combustion gases and / or the cascade-shaped cross-sectional expansion with simultaneous air supply. Measurements have shown that there is a combustion with a content below 0.1 CO vol.%.
  • the measures according to the invention convert the high combustion temperature to a low temperature of the hot gases at a high flow rate of these gases in a depressurized, concentric system. This is a prerequisite for favorable heat transfer coefficients on the surface to be heated.
  • the low temperature drop of the emerging hot gases in the direction of flow is also advantageous.
  • the method according to the invention can also be used to heat bodies which are very sensitive to excessive temperatures.
  • the method according to the invention can also be used to heat shrink films for packaging objects without the shrink film overheating even with small changes in distance.
  • surface heating, drying and coating e.g. carry out a pipe or coil coating in one pass.
  • the object can be achieved in that a further nozzle for compressed air with an axial flow component is arranged in a plane axially offset from the one nozzle and / or the rear openings as nozzles for compressed air to form a pump jet are formed with an axial flow component, through whose compressed air combustion air is conveyed into the combustion zone and the combustion gases are accelerated in the axial direction.
  • a further ring guide plate is provided, which forms the one ring channel with the one ring guide plate and / or forms another ring channel with rear openings, or by combining the two aforementioned alternative feature complexes .
  • throttle elements can be assigned to the rear openings of the ring channel for the air.
  • the throttle elements can be formed by a perforated disc.
  • the throttle elements can also be inclined blades, which then give the air supplied a swirl which favors swirling. Both the perforated disc and the inclined blades can serve as spacer and support elements between the ring guide plates.
  • Both the burner and the spray gun can be used in an oxygen-free atmosphere if each ring channel is closed on the back except for the openings for the supply of air and the openings are connected to a supply line for compressed air.
  • the end of the burner is closed by a ring plate except for a central opening.
  • a nozzle for a flushing medium with jet direction should be provided through the central opening, a ring guide plate being connected in particular to the opening. The rinsing medium then cleans the surface to be coated from residues arising during drying, such as. B. salt.
  • a further nozzle for a gaseous or liquid medium with jet direction can be arranged on the area of the substrate acted upon by the hot gases outside the burner head.
  • the burner and the spray gun have a concentric structure.
  • first ring guide plate 1 consists of a first ring guide plate 1 and a second ring guide plate 2 of larger diameter, which is arranged concentrically to the first ring guide plate 1 and is carried by spacers 3 from the first ring guide plate 1.
  • the spacers 3 are preferably designed as inclined blades.
  • a channel 4 for the supply of compressed air is provided centrally in the first ring guide plate 1 and is held by corresponding spacers 3. Approximately half the axial length of the ring guide plate 1, openings 5 formed as nozzles with a main flow component in the axial direction are formed in the channel 4.
  • the end of the channel 4 has a nozzle 6, which is already outside the ring guide plate 1 and emerges from the compressed air with a main flow component in the axial direction.
  • the nozzle 6 can also be designed as a slot die, wherein the slot can also be formed by a row of holes.
  • the ring channels formed by the ring guide plates 1, 2 and the compressed air channel 4 are open at the rear, so that outside air can be sucked in through these openings 7, 8.
  • the suction force is generated by the compressed air emerging from the nozzles 5, 6, which act as pump jets.
  • the supply of compressed air in two axially offset planes supplies the sucked-in air with kinetic energy, so that the air in the ring guide plates 1, 2 is accelerated in the axial direction with increasing air volume.
  • holes can also be provided in the walls of the ring guide plate 1 in the rear region.
  • annular nozzle 9 is arranged, which has a row of holes on the side facing the ring guide plate 2 for the escape of fuel gas.
  • the escaping fuel gas mixes with the air sucked in through the rear openings 7, so that a combustible gas-air mixture is formed for a ring flame.
  • a spray gun can also be constructed according to the principle of the burner described. In such a case, compressed air loaded with coating particles is supplied via the central channel 4 or, if the coating material is supplied separately, the coating material is supplied to the compressed air in the exit plane and atomized there. At a second, axially offset location, it can then either be central or annular further compressed air can be supplied to further accelerate the flow.
  • a further nozzle 10 is arranged on the side of the burner head for the supply of compressed air or a liquid medium, which is either blown or sprayed onto the surface of the substrate acted upon by the hot gases or into the hot gas jet.
  • compressed air dust particles and dirt particles released can be blown away during drying.
  • a liquid medium e.g. of an activating agent
  • the surface for the coating medium can be activated.
  • the nozzle 10 itself can be designed as a single nozzle or as a slot die. Instead of the slot, a row of holes can also be provided.
  • the coating medium is fed to a central high-pressure nozzle 11 with a cone jet.
  • the high-pressure nozzle 11 is arranged within a ring guide plate 12 which has openings 13 on the rear for the supply of air.
  • An annular duct 14 fed with compressed air is arranged on the outside of the annular guide plate 12. Compressed air with axial main flow components emerges from the annular channel 14 via a plurality of annularly arranged nozzles 15 into the annular channel formed by the annular guide plate 12 and the high-pressure nozzle 11, so that air is sucked in from the atmosphere via the openings 13.
  • Compressed air also passes from the ring channel 14 via ring-shaped, axial nozzles 16 into the ring channel, which is formed by the ring guide plate 12 and a ring guide plate 17 of larger diameter.
  • the compressed air emerging from the nozzles 16 acts as a pump jet and sucks in air via the rear openings 18.
  • An annular nozzle 19 for the supply of fuel gas into the annular channel is arranged in the outer annular channel on the inside of the annular guide plate 17.
  • Coating material is supplied via a nozzle 20, which can be closed by a central hollow needle 21.
  • Compressed air can be supplied via the hollow needle 21.
  • the nozzle 20 is surrounded by an annular nozzle 22, the annular channel of which is fed via an axial channel 24 and a branch 25 from a main channel 26 compressed air which atomizes the emerging coating material in the mouth plane of the nozzle 20.
  • the nozzle arrangement 20 to 22 is surrounded by an inner ring guide plate 27, which forms an annular channel with an outer ring guide plate 28, in which an annular nozzle 29 for fuel gas is arranged.
  • the rear of the ring channel is closed by a plate 30 except for openings 31, via which, with the interposition of an annular distribution channel 32, compressed air is supplied from the main supply channel 26.
  • the end face of the burner is closed except for a central opening 33 by an annular plate 34, to the inner edge of which an inwardly projecting, funnel-shaped ring guide plate 35 is connected.
  • the jet of hot gases is directed by the ring guide plate 35 and, on the other hand, the hot gases are swirled in the annular space formed by the ring guide plates 28, 35.
  • the cross section in the flow direction is initially gradually increased, with kinetic energy being supplied to the flow in axially offset planes with the compressed air supplied, and the cross section is reduced only when it exits in the area of the ring guide plate 34.
  • the burner described is suitable for use under water except for the front, central opening 33. Because of the central, additional compressed air jet through the hollow needle 21, a strong pump jet results which withstands the pressure from the outside.
  • a detergent in particular fresh water, can be supplied via the central opening 33 and additionally via a nozzle 36.
  • the beam direction should be slightly inclined to create a swirl.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Nozzles (AREA)
  • Gas Burners (AREA)
  • Resistance Heating (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Drying Of Solid Materials (AREA)
EP82104279A 1981-05-29 1982-05-15 Verfahren zum Erwärmen der Oberfläche eines Substrates mittels eines Heissgasstrahls, insbesondere unter gleichzeitiger Zufuhr von Beschichtungsstoff nach dem Flammspritzverfahren und Brenner zur Durchführung des Verfahrens Expired EP0066164B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82104279T ATE29113T1 (de) 1981-05-29 1982-05-15 Verfahren zum erwaermen der oberflaeche eines substrates mittels eines heissgasstrahls, insbesondere unter gleichzeitiger zufuhr von beschichtungsstoff nach dem flammspritzverfahren und brenner zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3121370 1981-05-29
DE19813121370 DE3121370A1 (de) 1981-05-29 1981-05-29 Pressluft-gasbrenner zum betrieb von flammspritzpistolen und als trockner

Publications (3)

Publication Number Publication Date
EP0066164A2 EP0066164A2 (de) 1982-12-08
EP0066164A3 EP0066164A3 (en) 1983-07-20
EP0066164B1 true EP0066164B1 (de) 1987-08-26

Family

ID=6133493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104279A Expired EP0066164B1 (de) 1981-05-29 1982-05-15 Verfahren zum Erwärmen der Oberfläche eines Substrates mittels eines Heissgasstrahls, insbesondere unter gleichzeitiger Zufuhr von Beschichtungsstoff nach dem Flammspritzverfahren und Brenner zur Durchführung des Verfahrens

Country Status (11)

Country Link
US (1) US4579280A (no)
EP (1) EP0066164B1 (no)
JP (1) JPS5824713A (no)
AR (1) AR228902A1 (no)
AT (1) ATE29113T1 (no)
BR (1) BR8203170A (no)
CA (1) CA1180548A (no)
DE (2) DE3121370A1 (no)
ES (1) ES512652A0 (no)
NO (2) NO155676C (no)
ZA (1) ZA823832B (no)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3611592A1 (de) * 1986-04-07 1987-10-08 Rothenberger Gmbh Co Handbrenner
GB8721481D0 (en) * 1987-09-11 1987-10-21 Volstatic Ltd Powder delivery apparatus
US4874310A (en) * 1988-02-25 1989-10-17 Selas Corporation Of America Low NOX burner
US5520334A (en) * 1993-01-21 1996-05-28 White; Randall R. Air and fuel mixing chamber for a tuneable high velocity thermal spray gun
US5445325A (en) * 1993-01-21 1995-08-29 White; Randall R. Tuneable high velocity thermal spray gun
US5405085A (en) * 1993-01-21 1995-04-11 White; Randall R. Tuneable high velocity thermal spray gun
US7051743B2 (en) * 2002-10-29 2006-05-30 Yong Bae Kim Apparatus and method for cleaning surfaces of semiconductor wafers using ozone
DE10332339A1 (de) * 2003-07-16 2005-02-03 BSH Bosch und Siemens Hausgeräte GmbH Heizungsanordnung für einen Trockner
US20090014558A1 (en) * 2007-07-12 2009-01-15 Itt Manufacturing Enterprises, Inc. Portable sprayer/mister/fogging system for dispersing media in a uniform and controlled manner
WO2012034018A1 (en) * 2010-09-09 2012-03-15 Integrated Green Technogies Llc Powder thermal spray device and system
KR101692347B1 (ko) * 2015-04-17 2017-01-03 주식회사 에스엠뿌레 분무기 및 분무조절장치
CN107597462B (zh) * 2017-09-30 2019-06-14 京华派克邯郸机械科技有限公司 一种发泡胶使用工艺
DE102017223113A1 (de) * 2017-12-18 2019-06-19 Sms Group Gmbh Brenner
JP7319821B2 (ja) * 2019-05-09 2023-08-02 株式会社Nippo 路面乾燥装置及び路面乾燥方法
CN112856491B (zh) * 2021-01-15 2022-08-19 宁波方太厨具有限公司 防干烧燃烧器及包含其的防干烧灶具

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FR493478A (fr) * 1918-12-02 1919-08-09 Thomas Stansfield Worthington Perfectionnements aux appareils à métalliser
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Also Published As

Publication number Publication date
JPS5824713A (ja) 1983-02-14
NO155676B (no) 1987-01-26
ZA823832B (en) 1983-09-28
NO155676C (no) 1987-05-06
EP0066164A2 (de) 1982-12-08
DE3121370A1 (de) 1983-05-19
ES8306526A1 (es) 1983-06-16
ATE29113T1 (de) 1987-09-15
NO860194L (no) 1982-11-30
BR8203170A (pt) 1983-05-17
US4579280A (en) 1986-04-01
ES512652A0 (es) 1983-06-16
CA1180548A (en) 1985-01-08
AR228902A1 (es) 1983-04-29
NO821795L (no) 1982-11-30
EP0066164A3 (en) 1983-07-20
DE3277064D1 (en) 1987-10-01

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