EP0133390B1 - 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
EP0133390B1
EP0133390B1 EP84401432A EP84401432A EP0133390B1 EP 0133390 B1 EP0133390 B1 EP 0133390B1 EP 84401432 A EP84401432 A EP 84401432A EP 84401432 A EP84401432 A EP 84401432A EP 0133390 B1 EP0133390 B1 EP 0133390B1
Authority
EP
European Patent Office
Prior art keywords
deflector
open
movable
conical
sprayed
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
EP84401432A
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English (en)
French (fr)
Other versions
EP0133390A1 (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 invention relates to a nozzle for spraying a liquid or pasty product.
  • the present invention achieves this result and it is applicable, more particularly, to the spraying of liquid or pasty fuels in pulverized coal burners.
  • the main object of the invention is to achieve the spraying of a liquid or pasty product using an auxiliary working fluid by means of a nozzle having a spray slot of variable section, with which the loss of load due to this nozzle is held at a constant value.
  • the pressure drop is kept constant by partial compensation of the pressure of the auxiliary working fluid thanks to 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 an obstruction of the nozzle slot occurs; 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.
  • Document DE-A-2 753 788 describes a dispersion nozzle which is constituted by a cylindrical hollow body in which is provided a lateral, tangential entry of a first fluid so as to cause in this body the formation of a vortex; the body has another arrival of a second fluid which is axial and which ends in the low pressure zone created by the vortex of the first fluid.
  • a conical valve is installed.
  • the latter is mounted mobile against the action of an elastic member and it limits, with a part fixed to the body, an annular dispersion slot which has a width G2 at rest.
  • the valve is attracted and it reduces the slit to a width G1 less than G2.
  • a self-regulating spray nozzle for liquids or pasty products comprising a body; an admission zone into this body of auxiliary working fluid; an inlet pipe for the liquid or pasty product to be sprayed; an open part fixed by its periphery to the free end of the body; an open deflector held tight between the open part and the body; a cylindrical-conical part movable in the longitudinal direction to the body, provided with orifices, the conical part of which is adapted to the opening of the open part by limiting with it an annular spraying slot and the cylindrical part of which is hollow for the arrival of the liquid or pasty product to be sprayed; a sealing device placed between the inlet pipe of the product to be sprayed and the cylindrical part of the movable cylindrical-conical part; a return spring arranged.
  • the deflector is applied against the open part by a face in which grooves are hollowed out which open into the annular chamber; the deflector limits at its periphery with the body a passage which is in communication with the intake area of the auxiliary working fluid and in which the grooves open, the orifices of the movable cylindrical-conical part also opening in this chamber annular to drive the product to be sprayed, the spring acting on said movable cylindrical-conical part in a direction tending to reduce the width of the annular spraying slot against the pressure prevailing in the annular chamber.
  • 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 constituted 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 consists of 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 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)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Road Signs Or Road Markings (AREA)
  • Dental Preparations (AREA)
  • Jellies, Jams, And Syrups (AREA)
  • Special Spraying Apparatus (AREA)
  • Cosmetics (AREA)

Claims (7)

1. Düse zum selbstregulierenden Zerstäuben von Flüssigkeiten oder pastösen Massen, mit einem Körper (1), mit einem Bereich (2) den Einlaß eines Hilfstreibmittels in diesen Körper, mit einem Zuleitungsrohr (3) für die zu zerstäubende Flüssigkeit oder pastöse Masse, mit einem Mündungsstück (4), das mit seinem Umfang am freien Ende des Körpers (1) befestigt ist, mit einer Ausgangsablenkscheibe (5), die eingeklemmt zwischen dem Mündungsstück (4) und dem Körper (1) gehalten wird, mit einem zylindrisch-konischen Element (7), das verschiebbar in Längsrichtung des Körpers (1) und mit Öffnungen (8) versehen ist, wobei der konische Abschnitt (7a) an die Öffnung des Mündungsstückes (4) angepaßt ist, um mit diesem einen ringförmigen Zerstäubungsschlitz (18) zu begrenzen, und wobei der zylindrische Abschnitt (7b) hohl ist zur Zuleitung der Flüssigkeit oder des pastösen Materials, mit einer Dichtungseinrichtung (9), die zwischen dem Rohr (3) zur Zuleitung des zu zerstäubenden Produktes und dem zylindrischen Abschnitt (7b) des verschiebbaren zylindrisch-konischen Elementes (30) angeordnet ist, mit einer Spannfeder (10), die zwischen der Ablenkscheibe (5) und einem Abstützpunkt (11) an dem zylindrischen Abschnitt (7b) des zylindrisch-konischen Elementes (7) angeordnet ist, und mit einer ringförmigen Kammer (12), die in Verbindung steht mit dem ringförmigen Zerstäubungsschlitz (18) und die zwischen dem Mündungsstück (4), der Ablenkscheibe (5) und dem konischen Abschnitt (7a) des verschiebbaren zylindrisch-konischen Elementes (7) ausgebildet ist, dadurch gekennzeichnet, daß die Ablenkscheibe (5) gegen das Mündungsstück (4) mit einer Fläche anliegt, in welcher Nuten (6) ausgebildet sind, welche in die ringförmige Kammer (12) münden, daß die Ablenkscheibe (5) mit ihrer Umfangsfläche mit dem Korper (1) einen Durchgang (15) begrenzt, welcher in Verbindung steht mit dem Bereich (2) für den Einlaß des Hilfstreibmittels, und in welchen die Nuten (6) münden, daß die Öffnungen (8) des verschiebbaren zylindrisch-konischen Elementes (7) ebenfalls in diese ringförmige Kammer (12) geöffnet sind, um in diese das zu zerstäubende Produkt zu leiten, und daß die Feder (10) auf das verschiebbare zylindrisch-konische Element (7) in einer Richtung einwirkt, um die Größe des ringförmigen Zerstäubungsschlitzes (18) gegen den Druck, der in der ringförmigen Kammer (12) herrscht, zu verringern.
2. Düse nach Anspruch 1, dadurch gekennzeichnet, daß die Nuten (6) tangential zu einem Kreis verlaufen, der konzentrisch ist zu der Umfangslinie der Öffnung der Ablenkscheibe (5).
3. Düse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Durchgang zwischen der Umfangsfläche der Ablenkscheibe (5) und dem Körper (1) gebildet wird durch Öffnungen (16), die zwischen dem Körper (1) und der Ablenkscheibe (5) ausgebildet sind, und daß die Öffnungen Kerben sind, die in einem kreisförmigen Rand (13) des Körpers (1) ausgebildet sind.
4. Düse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Durchgang zwischen der Umfangsfläche der Ablenkscheibe (5) und dem Körper (1) von Öffnungen (16) gebildet wird, die zwischen dem Körper (1) und der Ablenkscheibe (5) ausgebildet sind, und daß die Öffnungen Kerben sind, die in einem kreisförmigen Rand vorgesehen sind, der von der Ablenkscheibe (5) getragen wird.
5. Düse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ablenkscheibe (5) mittels einer Feder (21) gehalten wird, deren anderes Ende sich auf einem Abstützpunkt (20) innerhalb des Körpers (1) abstützt.
6. Düse nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das verschiebbare zylindrisch-konische Element (7) und/oder das Mündungsstück (4) aus einem harten, unzerbrechlichen und gegen Abrieb widerstandsfähigen Material bestehen.
7. Düse nach Anspruch 6, dadurch gekennzeichnet, daß das Material Keramik oder Wolframkarbit ist.
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 EP0133390A1 (de) 1985-02-20
EP0133390B1 true 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)

Families Citing this family (6)

* 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
ES2060486B1 (es) * 1991-11-11 1996-12-16 Munoz Jose Domingo Perfeccionamientos en los quemadores de combustibles liquidos y su procedimiento de funcionamiento.
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
WO2019104123A1 (en) 2017-11-22 2019-05-31 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

Family Cites Families (17)

* 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
GB322257A (en) * 1928-09-10 1929-12-05 Percy Farrow An improved liquid fuel burner
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
US2479166A (en) * 1946-05-27 1949-08-16 Gertrude F La Velle Oil burner with steam cleaning means
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
JPS5926348B2 (ja) * 1976-12-03 1984-06-26 三菱プレシジヨン株式会社 流体の微粒化分散装置
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

Also Published As

Publication number Publication date
DE3469588D1 (en) 1988-04-07
ATE32782T1 (de) 1988-03-15
CA1257144A (fr) 1989-07-11
DK334584A (da) 1985-01-09
BR8403377A (pt) 1985-06-18
JPS6038052A (ja) 1985-02-27
ZA845037B (en) 1985-02-27
US4597529A (en) 1986-07-01
EP0133390A1 (de) 1985-02-20
FR2548553B1 (fr) 1986-12-05
FR2548553A1 (fr) 1985-01-11
DK334584D0 (da) 1984-07-06

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