EP0133390A1 - Düse zum Zerstäuben von Flüssigkeiten oder pastösen Massen mit regelbarem Spalt - Google Patents

Düse zum Zerstäuben von Flüssigkeiten oder pastösen Massen mit regelbarem Spalt Download PDF

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Publication number
EP0133390A1
EP0133390A1 EP84401432A EP84401432A EP0133390A1 EP 0133390 A1 EP0133390 A1 EP 0133390A1 EP 84401432 A EP84401432 A EP 84401432A EP 84401432 A EP84401432 A EP 84401432A EP 0133390 A1 EP0133390 A1 EP 0133390A1
Authority
EP
European Patent Office
Prior art keywords
deflector
nozzle
periphery
working fluid
nozzle according
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.)
Granted
Application number
EP84401432A
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English (en)
French (fr)
Other versions
EP0133390B1 (de
Inventor
Jean-Louis Merry
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.)
Charbonnages de France CDF
Original Assignee
Charbonnages de France CDF
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 Charbonnages de France CDF filed Critical Charbonnages de France CDF
Priority to AT84401432T priority Critical patent/ATE32782T1/de
Publication of EP0133390A1 publication Critical patent/EP0133390A1/de
Application granted granted Critical
Publication of EP0133390B1 publication Critical patent/EP0133390B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet
    • F23D11/102—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber
    • F23D11/103—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber with means creating a swirl inside the mixing chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • 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
    • 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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
    • B05B7/0466—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber with means for deflecting the central liquid flow towards the peripheral gas flow
    • 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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge

Definitions

  • the present invention relates to a method of spraying a liquid or pasty product and a spray nozzle for its implementation.
  • the present invention achieves this object and is applicable, more particularly, to the spraying of liquid or pasty fuels in pulverized coal burners.
  • a first object of the invention consists in a process for spraying a liquid or pasty product into a nozzle comprising a slot of variable section, by means of an auxiliary working fluid, characterized in that the pressure drop in said nozzle is kept constant.
  • the pressure drop is kept constant by partially compensating the pressure of the auxiliary working fluid by a mechanical back pressure which varies the section of the nozzle slot.
  • the pressure drop is kept constant if, for example, the flow of fluid to be sprayed is deliberately reduced; the section of the nozzle slot is then automatically reduced.
  • the pressure drop is also kept constant if there is an obstruction of the nozzle slot; in this case the pressure temporarily increases, the section of the slot is automatically increased for a short time corresponding to the evacuation of the obstructing product, then the pressure returns to its chosen nominal value, thus maintaining a constant pressure drop.
  • the auxiliary working fluid is gaseous and is advantageously chosen from water vapor, compressed air and a combustible gas.
  • the open part (4) is fixed at its periphery to the body (1) by any known means (for example welding or bolting). Fixing can also be achieved by means of a clamping ring (19).
  • the shape of the part (4) can be any, for example cylindrical or spherical; advantageously this part (4) is frustoconical.
  • the face of the deflector (5) directed towards the part (4) has the same shape, thus providing a contact surface whose only discontinuities come from the presence of the grooves (6).
  • the axis of the opening of the part (4) and the axis of the conical part (7a) of the part (7) are combined.
  • the axis of the deflector opening (5) and the axis of the cylindrical part (7b) of the part (7) are also merged.
  • these 4 axes are combined.
  • these 4 axes are also merged with the axis of the body (1) and the axis of the inlet duct (3).
  • the deflector (5) is clamped between the part (4) and the body (1) so that the passage of the auxiliary working fluid between the periphery of the deflector (5) and the body (1) is possible.
  • This passage can be obtained, for example, by means of shims of suitable shapes or else by openings made between the body (1) and the internal face of the deflector (5).
  • These openings (16) can be constituted by notches made in a circular rim (13) of the body (1). Or they can be formed by notches made in a circular rim carried by the deflector (5).
  • the deflector (5) can also be held in place by means of a spring, the other end of which rests on a support point (for example a shoulder) intrinsic to the body (1). In the latter case, the passage for the auxiliary working fluid is formed by the space between the turns of the spring.
  • sealing means are provided between the inside of the deflector opening (5) and the outside of the cylindrical part (7b).
  • the grooves (6) formed on the face of the deflector (5) in contact with the part (4) are advantageously tangential to a concentric circle at the periphery of the opening of the deflector (5), as shown in Figure 1.
  • This a particular arrangement makes it possible to obtain a rotation of the fluid to be sprayed in the annular chamber (12).
  • the shape of their section can be arbitrary and is not necessarily the same from one end to the other of the groove; advantageously this section is triangular.
  • their number is between 4 and 8 and they are regularly distributed.
  • the fulcrum (11) may consist of a stop ring or a shoulder of the cylindrical part (7b).
  • the auxiliary working fluid is admitted into the annular space (2) between the body (1) and the inlet duct (3) of the fluid to be sprayed. Access to the working fluid at the peripheral ends of the grooves (6) takes place via a circular channel (15) provided between the internal wall of the body (1) and the periphery of the deflector (5).
  • the passage of the annular space (2) between the body (1) and the conduit (3) to the circular channel (15) takes place through the passage formed between the body (1) and the periphery of the deflector ( 5).
  • the cylindrical-conical part (7) may include a nut.
  • the cylindrical-conical part (7) and / or the part (4) are advantageously made of a hard, non-pierceable and abrasion-resistant material such as a ceramic material or tungsten carbide.
  • FIG. 2 we notice the body (1) carrying a rim (13) in which notches (16) have been made allowing the working fluid to pass from the annular space (2) comprised between the body (1) and the conduit (3) to the circular channel (15), the part (4) of frustoconical shape with central opening, the deflector (5) with its tangential grooves (6), the clamping ring (19), the cylindrical-conical part mobile (7) comprising orifices (8), a sealing device (9) by O-ring, the return spring (10), the stop ring (11), the annular chamber (12), the quick-release nut (17).
  • FIG 3 there is a particular shape of the inner wall of the body (1) carrying a shoulder (20).
  • a retaining spring (21) is placed between this shoulder and the deflector (5) whose conical part is thus pressed against the internal surface of the frustoconical part (4).
  • the passage for the auxiliary working fluid is formed by the space between the turns of the spring (21).
  • the self-regulating spray nozzle according to the invention operates as follows, with reference to FIG. 2.
  • the fluid to be sprayed is introduced into the conduit (3) using a pump and arrives inside the cylindrical part (7b) of the moving part (7). It exits through the orifices (8) and flows along the conical part (7a) of the movable part (7) or else along the visible part of the internal face of the frustoconical part (4), depending on the nozzle position in relation to the vertical.
  • the working fluid for example compressed air
  • the working fluid is conveyed under pressure in the annular space (2) between the body (1) and the conduit (3), it passes through the circular channel (15) through the openings (16) then is distributed in the tangential grooves (6) to arrive in the annular chamber (12) by rotating the fluid to be sprayed therein.
  • a mixture of the fluid to be sprayed and the working fluid forms in the annular chamber (12) and escapes through the circular slot (18) which has opened between the edge of the central opening of the frustoconical part (4) and the edge of the conical part (7a) of the movable cylindrical-conical part (7).
  • the width obtained for said slot (18) is obviously a function of the pressure prevailing in the annular chamber (12) and of the back pressure of the return spring (10).
  • the pressure prevailing in the annular chamber (12) is the pressure drop which is therefore kept constant by means of the return spring (10).
  • the spray nozzle according to the invention makes it possible to maintain the pressure drop in the circular slot (18) if the flow of fluid to be sprayed is deliberately reduced (maintaining the pressure drop therefore ensures good spraying), or else if an obstruction of the slit (18) occurs: in this case the pressure drop increases and the width of the slit increases allowing the impurities which obstruct it to be evacuated; after this evacuation, the value chosen for the pressure drop is automatically restored.
  • the nozzle according to the invention makes it possible to spray a liquid having any viscosity, by adjusting the pressure drop by means of the return spring (10). It thus makes it possible to spray pasty products.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Dental Preparations (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Road Signs Or Road Markings (AREA)
  • Jellies, Jams, And Syrups (AREA)
  • Cosmetics (AREA)
  • Special Spraying Apparatus (AREA)
EP84401432A 1983-07-08 1984-07-05 Düse zum Zerstäuben von Flüssigkeiten oder pastösen Massen mit regelbarem Spalt Expired EP0133390B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401432T ATE32782T1 (de) 1983-07-08 1984-07-05 Duese zum zerstaeuben von fluessigkeiten oder pastoesen massen mit regelbarem spalt.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8311425 1983-07-08
FR8311425A FR2548553B1 (fr) 1983-07-08 1983-07-08 Procede de pulverisation d'un liquide ou produit pateux et une buse de pulverisation pour sa mise en oeuvre

Publications (2)

Publication Number Publication Date
EP0133390A1 true EP0133390A1 (de) 1985-02-20
EP0133390B1 EP0133390B1 (de) 1988-03-02

Family

ID=9290657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401432A Expired EP0133390B1 (de) 1983-07-08 1984-07-05 Düse zum Zerstäuben von Flüssigkeiten oder pastösen Massen mit regelbarem Spalt

Country Status (10)

Country Link
US (1) US4597529A (de)
EP (1) EP0133390B1 (de)
JP (1) JPS6038052A (de)
AT (1) ATE32782T1 (de)
BR (1) BR8403377A (de)
CA (1) CA1257144A (de)
DE (1) DE3469588D1 (de)
DK (1) DK334584A (de)
FR (1) FR2548553B1 (de)
ZA (1) ZA845037B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2060486A2 (es) * 1991-11-11 1994-11-16 Munoz Jose Domingo Perfeccionamientos en los quemadores de combustibles liquidos y su procedimiento de funcionamiento.

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4717073A (en) * 1986-05-02 1988-01-05 The Boeing Company Sprayer head
JPH0558017U (ja) * 1992-01-17 1993-08-03 栄 野手 ランプを備えた傘
DE19509223C1 (de) * 1995-03-17 1996-11-07 Holger Schrader Mehrstoff-Zerstäuberdüse
US11400464B2 (en) 2017-11-22 2022-08-02 Bete Fog Nozzle, Inc. Spray nozzle
CN111068941A (zh) * 2020-01-13 2020-04-28 上海熙众新能源技术有限公司 环卫车及其喷嘴

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB322257A (en) * 1928-09-10 1929-12-05 Percy Farrow An improved liquid fuel burner
US2479166A (en) * 1946-05-27 1949-08-16 Gertrude F La Velle Oil burner with steam cleaning means
DE2753788A1 (de) * 1976-12-03 1978-06-08 Mitsubishi Precision Co Ltd Vorrichtung zum zerstaeuben und dispergieren von fluida

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US453918A (en) * 1891-06-09 Spraying device
GB177223A (en) * 1920-12-17 1922-03-17 Fernand Aloys Emile Wegscheide Burner for fuel oil
US2229467A (en) * 1938-06-07 1941-01-21 Sun Shipbuilding & Dry Dock Co Nozzle
US2453416A (en) * 1941-12-24 1948-11-09 Petrolite Corp Fluid distribution system
US2414442A (en) * 1944-02-03 1947-01-21 Delphis C Breault Burner construction
DE1078545B (de) * 1953-12-28 1960-03-31 Basf Ag Vorrichtung zur Durchfuehrung von chemischen Reaktionen zwischen gasfoermigen und fluessigen Medien
US2914257A (en) * 1959-01-02 1959-11-24 Wiant Hugh Combination burner nozzle
US3326470A (en) * 1965-04-27 1967-06-20 Babcock & Wilcox Co Liquid atomizer
US3615053A (en) * 1970-06-16 1971-10-26 Bethlehem Steel Corp Gas pressure regulated atomizer tip for gas/oil burner
US3742701A (en) * 1971-06-16 1973-07-03 Us Navy Propellant injector assembly
US3746262A (en) * 1971-10-12 1973-07-17 Bete Fog Nozzle Inc Spray nozzle
DE3033767C2 (de) * 1979-09-10 1987-02-12 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Vorrichtung zur Abgabe und Förderung von Schlamm
US4341351A (en) * 1980-06-02 1982-07-27 Stanadyne, Inc. Outwardly opening poppet pintle nozzle
DE3106962C2 (de) * 1981-02-25 1986-12-04 Lechler Gmbh & Co Kg, 7012 Fellbach Zweistoff-Zerstäubungsdüse

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB322257A (en) * 1928-09-10 1929-12-05 Percy Farrow An improved liquid fuel burner
US2479166A (en) * 1946-05-27 1949-08-16 Gertrude F La Velle Oil burner with steam cleaning means
DE2753788A1 (de) * 1976-12-03 1978-06-08 Mitsubishi Precision Co Ltd Vorrichtung zum zerstaeuben und dispergieren von fluida

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MARINE ENGINEERING AND SHIPBUILDING ABSTRACTS, vol. 26, no. 7, juillet 1963, page 118; "Spray nozzle" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2060486A2 (es) * 1991-11-11 1994-11-16 Munoz Jose Domingo Perfeccionamientos en los quemadores de combustibles liquidos y su procedimiento de funcionamiento.

Also Published As

Publication number Publication date
CA1257144A (fr) 1989-07-11
BR8403377A (pt) 1985-06-18
FR2548553B1 (fr) 1986-12-05
EP0133390B1 (de) 1988-03-02
DK334584D0 (da) 1984-07-06
ZA845037B (en) 1985-02-27
US4597529A (en) 1986-07-01
ATE32782T1 (de) 1988-03-15
DE3469588D1 (en) 1988-04-07
DK334584A (da) 1985-01-09
FR2548553A1 (fr) 1985-01-11
JPS6038052A (ja) 1985-02-27

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