CA1221902A - Twin fluid atomizer - Google Patents
Twin fluid atomizerInfo
- Publication number
- CA1221902A CA1221902A CA000455579A CA455579A CA1221902A CA 1221902 A CA1221902 A CA 1221902A CA 000455579 A CA000455579 A CA 000455579A CA 455579 A CA455579 A CA 455579A CA 1221902 A CA1221902 A CA 1221902A
- Authority
- CA
- Canada
- Prior art keywords
- tubular member
- plug
- atomizer
- inner tubular
- fluid
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/005—Burners for combustion of pulverulent fuel burning a mixture of pulverulent fuel delivered as a slurry, i.e. comprising a carrying liquid
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
- Nozzles (AREA)
Abstract
TWIN FLUID ATOMIZER
ABSTRACT OF THE DISCLOSURE
An atomizer for mixing a compressible fluid such as air or steam with a liquid fuel to atomize the latter, in which a pair of tubular members are disposed in a concentrically-spaced relation-ship with the compressible fluid being introduced to the inner-tubular member and the liquid fuel being introduced in the annular space between the two members. A mixing chamber is provided for receiving the fuel and the fluid, and is in communication with a continuous annular discharge passage for discharging the atomized fuel.
ABSTRACT OF THE DISCLOSURE
An atomizer for mixing a compressible fluid such as air or steam with a liquid fuel to atomize the latter, in which a pair of tubular members are disposed in a concentrically-spaced relation-ship with the compressible fluid being introduced to the inner-tubular member and the liquid fuel being introduced in the annular space between the two members. A mixing chamber is provided for receiving the fuel and the fluid, and is in communication with a continuous annular discharge passage for discharging the atomized fuel.
Description
~22~
TWIN l`t,UID ATOM:t:~ER
_C'lCGROitNl) OF TrlE INVENTION
This invention relates to an atomizer, and more particularly, to an atomizer Lor mixing a compressible fluid with a liquid fuel to atomize the latter before it is discharged into the furnace section oE a boiler or the like, for combustion. The burners associated with most industrial bo;lers utilize some type of twin fluid atomizer which functions by utilizing the stored energy in a compressible fluid, such as air or steam, to achieve the atomization. In most twin fluid atomizers in use today, a li~uid fuel, such as a fuel oil, is injected into a mixing chamber through slots in a distributor plug or the like. High pressure air or steam is passed down a central tube and through a set of orifices in the distributor plug into the mixing chamber and impinges on ~he atomizing fluid. The emulsion formed in the mixing chamber is then accelerated out of the atomiæer through a plurality of exit orifices formed through an orifice pla-te. A problem exists in these type of atomizers since the orifice plate and, more particularly, the orifice walls, even when manufactured from hardened tool steel, wear rather rapidly when firing dirty fuels and especially slurry fuels ~uch as coal-oil or coal-water mixtures. To minimize this rate o~ wear, it was suggested to operate the atomizer with as low a pressure and exit ~elocity as possible. ~lowever, this tends to compromise the overall per~ormance of the atomi~er. Another suggested solution to minimize this wear is to fabricate the orifice plate of extremely hard materials or, alternatively, apply a surface hardening technique to the wall port;.ons cler:ini.ng the orir:ices. Ilowever, in view of -the re:latively small inner diameters involved, it is difficult to precision dr:il:L ll-le re:latively hard material or surface harden the oriEice walls. ~rhi.s, oE course, considerably adds to -the expense oE the atomizer and is, in some cases, economically unfeasible.
SUMM~Y o~ INVENTIOM
It is therefore an object of the present invention -to provide an atomizer whicl-) can handle relative].y dirty fuel such as coal-water mixtures, and yet enjoys an extended liEe span.
It is a further object of the present invention to provide an atomizer of the above type wh:ich elirninates the need for precision drilling or surface hardenlng oE the discharye orifices and yet is immune to undue wear by -the dirty fuel.
In accordance with the present invention, there is provided an atornizer comprising an inner tubular member Eor receiving a cornpressib]e Eluid, an outer tubular member extending in a concentrically spaced relation to the inner tubular rnember to define an annular passage between the members for receiving a liquid fuel, and a plu~ member extending with-in the corresponding ends of the rnernbers and defining therewith a first annular discharye orifice for the fluid exiting from the inner tubular member, a mixing charnber for mixing the fluid with the fue:L discharging from the annular passage, and a second annular discharge orifice Eor discharging the mixture.
The plug member rnay have a conical shape and where-in the correspondirlg ends are tapered so as to extend substantially parallel to the plug rnember.
The atomizer of claim 1 may also include a distributor plug dlsposed in the inner tubular melllber and having a plurality of through passages for the rluid and a bore for receiving the plug member. The bore may be in threaded engagement with a corresponding portion of the plug meltlber to movement of the plug member relative to the correspondi.ng ends to permit the sizes of the discharge orifices and the mixing challlber to be selectively varied.
. I
~.22~90;~ ~ I
!
., ' E~RIEF DESCF~IP'rI~)N OP 'I'~IE DRAWl:NCS s ~h~ abova brief de~crlption A well ~ further ob~ect5~9 ~ O ~e~ture~ and ~dvantagas o~ the pr~sen~ invention will bæ I;
more fully appreciated by reference to the following detalled descripti~n of presently preferred but nonetheless illu~tra~va .~bodiment~ ln acco~dance wi.th th~ pre~en~ invention when taken conjunction wlth th~ accomp~nying drawings whereinO
~ lgure~ a horizontal cro~ ectional v~ew deplctlnq th~ atomiz~r of the pre~ant invention;
~igure 2 i~ a vertical ~ro~s-~ectlonal vlew t~ n along ., the line 2-2 of Figure l;
Figure 3 and 5 are views similar t~ ~igure 1 but depictiny ~lternate embodiments of the atomi~er of the present invent:lon; and Fi~ure ~ i5 a vert.ical cros3-sectional view tak~n along line 4-4 of Figure 3O '.
D~scRlp~rToN O~ Tl~ PRE~'ERRED ~M~ODIMENrS
Th~ atomizer of the present invention i6 ~hown in g~neral by the re~ere~ce lO in Figure 1 and incllldes an outer tubular m~ber 12 havin~ an inner tubular member 14 di3po~ed thexeln in a concentrically spaced relation~h.ip to defin~ an annul~r chamber 16 therebetween. It i~ under~tood that the outer tubular member 1 and the inner tubular mell~be~ 14 can form th~ inner and outer barrels of a burner a~sembly, including a fuel gun, which i~troduce~ the liquid fuel to the passage 160 and an air source which introduces air to the inner tubul~r member 14.
The discharge end portion of the outer tubular ~le~ber has ~n increased wall thickness to define a tapered diacha~g~ opening 12a. q'he co~r~spollding di~charge end ~ortion of the inner ~2~
.
tublllar m~mber 1~ extcnds a:;iall.y inwardly fro,n the op~ning 12a and :
i~ also tapered, as shown hy the reference 14a. It is understood that the inner tubular member is mounted relative to the outer j;
tubular member in any conventional manner such as by set screws .
(not shown~, or the li.ke.
A distributor plu~ 17 is disposed within the inner tubular '.
member 14 in a slightly spaced relationship to the end portion 14a. ., Four angularly spaced through passages 18 and a threaded central ~.
bore 19 are forrned through the distributor plug 17 for reasons that .
will be described later.
A discharge plug, shown in general by the reference 20, .
extends within t~e ~ischarge ends 12a and 14a of the tubular .~
members 12 and 14, respectively, and has a stem portion ~2, the end ~,, portion of which is threaded and in engagement within the threaded '.
bore 19 of the distr.ibutor plug 17.
The outer tapered wall portion oE the discharge plug 20 .is ~
stepped as shown to form a f.irst wall portion 20a which extends :
parallel with the tapered end portion 12a of the outer tubular .
member 12, and a second portion 20b which extends parallel with the ~0 tapered end portion l~a oE the inner tubular member 14. Thus, an .
annular pa~sage-discharge ori.fice 24 is defined between the end :' portion 14a of the inner tubular member 14 and the corresponding wall portion 20b of the discharge plug 20l while a second annular !.
passage-discharge orifice 7.6 i5 defined between the end portion 12a .
oE the outer tubular member 12 and the wall portion 20a oE the discharge plug 20. ~ mixing chamber 28 is def.ined by the inner and outer tubular members 12 and 14l respectively, and the discharg~ .
plug 20, and is located just downstream from the passage-discharge ~;
orifice 24 and upstrea-n from the passage-discharge oriEice 26.
~i ~~~ I ,~
ii In o?~rltion, li~tli.d fllel., such as oil or a mixt-lre oE 1 coal and water, is introdllced into the annular passage 16 and k passes into the m:i~ing chamber 28. A compressible fluid, such as air or steam, is introduced into the inner tubular member 14 and passes through the orifices lB before passing through and exiting ~rom the annular passage-discharge orifice 24 and into the mixing chamber 28, where it impinges upon, or shears, the fuel. The emu].sion formed in ~he mixing chamber 28 is then accelerated ~ut of .
the atomizer through the passage-discharge orifice 26 and the .
atomization is complete.
It can be appreciated that the tubul.ar me-nbers 12 and 14, .
or at least their end portions 12a and 14a, along with the .
discharge plug 20 can be manufactured of a very hard material that will withstand the wear attendant with the use of dirty fu~l such .
as coal-water mixtures, while eliminating the need for preclsion ~
dri].ling or surEace hardening of any orifices, or the like. .
Furthermore, the respective sizes of the passage-discharge orifices 24 and 26 can be selectively varied by simply adjusting the position of the discharge plug relative to the distributor plug 17. ~.
Another alternate embocliment of the atomizer of the present invention is shown in general by the reference 30 in Figs.
3 and 4, and includes an outer tubular member 32 extending over, and in a concentric spaced relationship to~ an inner tubular member 33 to define an annular passage 34. The inne~ tubular member r' extends over a distributor plug 36 and is secured thereto in any known manner. Four angularly-spaced through passages 38, along with a -threaded central bore 39 are Eormed through the distributor plug 36. The distributor plug 36 in-ludes an extended diameter, flanged portion 36a, which has eicJht circumferentially spaced ..
_5_ 1 .
~hrough passages ~ ~ormed ~heL~through. ~;
A discharge plug 41 is provided which has a conical portion 42 and a stem portion ~3, the end portion of which is .
externally threaded Lor extending in the threaded bore 39 of the , distributor plug 36. ;
A sprayer plate 44 is disposed in an abutting relationship .
with the front face of the flanged portion 36a o:E the distrihutor plug 36, and deEines therewith a radial passage 46. The sprayer plate has a tapered wall portion 44a defining a discharge opening, .
O and a central bore portion 44b both of which, together with the outer sur~ace of the conical plug 40 define a continuous annular discharge passage 52. , The orifices 38 and the radial passage ~6 communicate with ~
a mixing chamber 54 defined by the distributor plu~ 36, thei discharge plug 41 of the sprayer plate 44 and which, in turn, ;
collununicates with the discharge passage 52. A tip nut 56 is in .
threaded engagement with the outer tubular member 32, extends over the dis~ributor plug 36 and the sprayer plate 44, and has a flanged portion 56a extending over a cooperating flange portion of the .
sprayer plate 44 to secure the components in the position shown~
In operation, fuel is introduced into the annular passage 34 where it passes through the passages 40, through the radial ;
passage 46 and to the mixing chamber 54. Air introduced to the ,~
inner tubular member 33 passes through the passages 38 before entering the mixing chamber 54 where it impinges on, or shears~ the fuel in the latter chamber formin~J an emulsion which is then accelerated out oE the atomizer 30 via the discharge passage 52.
It w.ill be apparent that the embodiment oE ~igure 3 enjoys ..
the advantages of the embodiment of Figure 1, to wit, the A,' 1~`
-6- 1 i 1~2190~ 1 ~
!
~'linlina~ion of a p~ ality oE inclivicl~lal, rekltively sm.lll, ~
orifices which are difficult to drill or surface harden, as z described above.
Another alternate embodiment of the atomi~er of the present invention is shown in general by the reference 60 in Fig. S , and includes an outer tubular rnember 62 extendincJ over, and in a concentric spaced relationship to, an inner tubular member 64 to defirle a~ annular passage 66. The inner tubular member 64 extends , over a distributor plug 68 and is secured thereto in any known ) manner. Four angularly-spaced through passages 70 ~-two of which are shown in the drawing), along with a threaded central bore 72, 5 are formed through the distrlbutor plug 68. The distributor plug -68 includes an extended diameter, flanged portion 7q, which has a plurality of through passages 76 formed therethrough and registering with the annular passage 66. The passages 76 extend at ~, a slight angle to the horizontal as viewed in Fig. 5 ~nd, although only two are shown in the drawing, it is understood that a plurality, such as eight, are angularly spaced around the axis of the distributor plug 68.
~o ~ discharge plug 78 is provided which has a conical ,portion 80 and a stem portion 8~, the end portion of which is externally threaded Eor extending in the threaded bore 72 of the .
distributor plug 68. r~
1'he flanged portion 74 of the distributor plug 68 has a stepped, tapered discharge end portion 84 which, together with the , outer surEaces of the discharge plug 78 define a continuous annular discharge passage 86. A mixing ch~mber 88 is c~efined at the ar~a ~
where the passages 76 communicate with the discharge passa~e 86. 1:
A tip nut ~0 is in threacled engagement with the outer .
~.~21~02 t~ ar member 6), ..:.ter~ ver ~ fl.antJed portlorl ~4 oE the distributor plug 68, and has a flangecl portion 9na abutting the front ace of the latter flan~ed port;.on to secure the components in the position sllown.
In operation, fuel is introduced into the annul~r passage 66 where it passes through the passages 76 and to the mixiny chamber B8. Air introduced to the inner tubular member 64 passes through the passages 70 before entering the mixing chamber 88 where it impinges on, or shears, the fuel in the latter chamber, form.ing an emulsion which is then accelerated out oE the atomizer 60 via the discharge passaye 86.
It will be apparent that the embodiment of Fig. 5 i8 .
formed by relatively few comporlents, enjoys the advantages of the , embodiments of Figs. 1 and 3, to wit, the elimination of a .
plurality of individual, relatively small, orifices which are difficult to drill or surEace harden, as described above.
Other modifications, changes and substitutions are interlde~ in the foregoing disclosure and in some instances some ~eatures of the invention will be employed without a corresponding use of other features. Accordingly, it is appropriate that the appended claims be construed broadly and in a manner consistent with the spirit ~nd ~cope of the invention therein.
,~, ~B- j -
TWIN l`t,UID ATOM:t:~ER
_C'lCGROitNl) OF TrlE INVENTION
This invention relates to an atomizer, and more particularly, to an atomizer Lor mixing a compressible fluid with a liquid fuel to atomize the latter before it is discharged into the furnace section oE a boiler or the like, for combustion. The burners associated with most industrial bo;lers utilize some type of twin fluid atomizer which functions by utilizing the stored energy in a compressible fluid, such as air or steam, to achieve the atomization. In most twin fluid atomizers in use today, a li~uid fuel, such as a fuel oil, is injected into a mixing chamber through slots in a distributor plug or the like. High pressure air or steam is passed down a central tube and through a set of orifices in the distributor plug into the mixing chamber and impinges on ~he atomizing fluid. The emulsion formed in the mixing chamber is then accelerated out of the atomiæer through a plurality of exit orifices formed through an orifice pla-te. A problem exists in these type of atomizers since the orifice plate and, more particularly, the orifice walls, even when manufactured from hardened tool steel, wear rather rapidly when firing dirty fuels and especially slurry fuels ~uch as coal-oil or coal-water mixtures. To minimize this rate o~ wear, it was suggested to operate the atomizer with as low a pressure and exit ~elocity as possible. ~lowever, this tends to compromise the overall per~ormance of the atomi~er. Another suggested solution to minimize this wear is to fabricate the orifice plate of extremely hard materials or, alternatively, apply a surface hardening technique to the wall port;.ons cler:ini.ng the orir:ices. Ilowever, in view of -the re:latively small inner diameters involved, it is difficult to precision dr:il:L ll-le re:latively hard material or surface harden the oriEice walls. ~rhi.s, oE course, considerably adds to -the expense oE the atomizer and is, in some cases, economically unfeasible.
SUMM~Y o~ INVENTIOM
It is therefore an object of the present invention -to provide an atomizer whicl-) can handle relative].y dirty fuel such as coal-water mixtures, and yet enjoys an extended liEe span.
It is a further object of the present invention to provide an atomizer of the above type wh:ich elirninates the need for precision drilling or surface hardenlng oE the discharye orifices and yet is immune to undue wear by -the dirty fuel.
In accordance with the present invention, there is provided an atornizer comprising an inner tubular member Eor receiving a cornpressib]e Eluid, an outer tubular member extending in a concentrically spaced relation to the inner tubular rnember to define an annular passage between the members for receiving a liquid fuel, and a plu~ member extending with-in the corresponding ends of the rnernbers and defining therewith a first annular discharye orifice for the fluid exiting from the inner tubular member, a mixing charnber for mixing the fluid with the fue:L discharging from the annular passage, and a second annular discharge orifice Eor discharging the mixture.
The plug member rnay have a conical shape and where-in the correspondirlg ends are tapered so as to extend substantially parallel to the plug rnember.
The atomizer of claim 1 may also include a distributor plug dlsposed in the inner tubular melllber and having a plurality of through passages for the rluid and a bore for receiving the plug member. The bore may be in threaded engagement with a corresponding portion of the plug meltlber to movement of the plug member relative to the correspondi.ng ends to permit the sizes of the discharge orifices and the mixing challlber to be selectively varied.
. I
~.22~90;~ ~ I
!
., ' E~RIEF DESCF~IP'rI~)N OP 'I'~IE DRAWl:NCS s ~h~ abova brief de~crlption A well ~ further ob~ect5~9 ~ O ~e~ture~ and ~dvantagas o~ the pr~sen~ invention will bæ I;
more fully appreciated by reference to the following detalled descripti~n of presently preferred but nonetheless illu~tra~va .~bodiment~ ln acco~dance wi.th th~ pre~en~ invention when taken conjunction wlth th~ accomp~nying drawings whereinO
~ lgure~ a horizontal cro~ ectional v~ew deplctlnq th~ atomiz~r of the pre~ant invention;
~igure 2 i~ a vertical ~ro~s-~ectlonal vlew t~ n along ., the line 2-2 of Figure l;
Figure 3 and 5 are views similar t~ ~igure 1 but depictiny ~lternate embodiments of the atomi~er of the present invent:lon; and Fi~ure ~ i5 a vert.ical cros3-sectional view tak~n along line 4-4 of Figure 3O '.
D~scRlp~rToN O~ Tl~ PRE~'ERRED ~M~ODIMENrS
Th~ atomizer of the present invention i6 ~hown in g~neral by the re~ere~ce lO in Figure 1 and incllldes an outer tubular m~ber 12 havin~ an inner tubular member 14 di3po~ed thexeln in a concentrically spaced relation~h.ip to defin~ an annul~r chamber 16 therebetween. It i~ under~tood that the outer tubular member 1 and the inner tubular mell~be~ 14 can form th~ inner and outer barrels of a burner a~sembly, including a fuel gun, which i~troduce~ the liquid fuel to the passage 160 and an air source which introduces air to the inner tubul~r member 14.
The discharge end portion of the outer tubular ~le~ber has ~n increased wall thickness to define a tapered diacha~g~ opening 12a. q'he co~r~spollding di~charge end ~ortion of the inner ~2~
.
tublllar m~mber 1~ extcnds a:;iall.y inwardly fro,n the op~ning 12a and :
i~ also tapered, as shown hy the reference 14a. It is understood that the inner tubular member is mounted relative to the outer j;
tubular member in any conventional manner such as by set screws .
(not shown~, or the li.ke.
A distributor plu~ 17 is disposed within the inner tubular '.
member 14 in a slightly spaced relationship to the end portion 14a. ., Four angularly spaced through passages 18 and a threaded central ~.
bore 19 are forrned through the distributor plug 17 for reasons that .
will be described later.
A discharge plug, shown in general by the reference 20, .
extends within t~e ~ischarge ends 12a and 14a of the tubular .~
members 12 and 14, respectively, and has a stem portion ~2, the end ~,, portion of which is threaded and in engagement within the threaded '.
bore 19 of the distr.ibutor plug 17.
The outer tapered wall portion oE the discharge plug 20 .is ~
stepped as shown to form a f.irst wall portion 20a which extends :
parallel with the tapered end portion 12a of the outer tubular .
member 12, and a second portion 20b which extends parallel with the ~0 tapered end portion l~a oE the inner tubular member 14. Thus, an .
annular pa~sage-discharge ori.fice 24 is defined between the end :' portion 14a of the inner tubular member 14 and the corresponding wall portion 20b of the discharge plug 20l while a second annular !.
passage-discharge orifice 7.6 i5 defined between the end portion 12a .
oE the outer tubular member 12 and the wall portion 20a oE the discharge plug 20. ~ mixing chamber 28 is def.ined by the inner and outer tubular members 12 and 14l respectively, and the discharg~ .
plug 20, and is located just downstream from the passage-discharge ~;
orifice 24 and upstrea-n from the passage-discharge oriEice 26.
~i ~~~ I ,~
ii In o?~rltion, li~tli.d fllel., such as oil or a mixt-lre oE 1 coal and water, is introdllced into the annular passage 16 and k passes into the m:i~ing chamber 28. A compressible fluid, such as air or steam, is introduced into the inner tubular member 14 and passes through the orifices lB before passing through and exiting ~rom the annular passage-discharge orifice 24 and into the mixing chamber 28, where it impinges upon, or shears, the fuel. The emu].sion formed in ~he mixing chamber 28 is then accelerated ~ut of .
the atomizer through the passage-discharge orifice 26 and the .
atomization is complete.
It can be appreciated that the tubul.ar me-nbers 12 and 14, .
or at least their end portions 12a and 14a, along with the .
discharge plug 20 can be manufactured of a very hard material that will withstand the wear attendant with the use of dirty fu~l such .
as coal-water mixtures, while eliminating the need for preclsion ~
dri].ling or surEace hardening of any orifices, or the like. .
Furthermore, the respective sizes of the passage-discharge orifices 24 and 26 can be selectively varied by simply adjusting the position of the discharge plug relative to the distributor plug 17. ~.
Another alternate embocliment of the atomizer of the present invention is shown in general by the reference 30 in Figs.
3 and 4, and includes an outer tubular member 32 extending over, and in a concentric spaced relationship to~ an inner tubular member 33 to define an annular passage 34. The inne~ tubular member r' extends over a distributor plug 36 and is secured thereto in any known manner. Four angularly-spaced through passages 38, along with a -threaded central bore 39 are Eormed through the distributor plug 36. The distributor plug 36 in-ludes an extended diameter, flanged portion 36a, which has eicJht circumferentially spaced ..
_5_ 1 .
~hrough passages ~ ~ormed ~heL~through. ~;
A discharge plug 41 is provided which has a conical portion 42 and a stem portion ~3, the end portion of which is .
externally threaded Lor extending in the threaded bore 39 of the , distributor plug 36. ;
A sprayer plate 44 is disposed in an abutting relationship .
with the front face of the flanged portion 36a o:E the distrihutor plug 36, and deEines therewith a radial passage 46. The sprayer plate has a tapered wall portion 44a defining a discharge opening, .
O and a central bore portion 44b both of which, together with the outer sur~ace of the conical plug 40 define a continuous annular discharge passage 52. , The orifices 38 and the radial passage ~6 communicate with ~
a mixing chamber 54 defined by the distributor plu~ 36, thei discharge plug 41 of the sprayer plate 44 and which, in turn, ;
collununicates with the discharge passage 52. A tip nut 56 is in .
threaded engagement with the outer tubular member 32, extends over the dis~ributor plug 36 and the sprayer plate 44, and has a flanged portion 56a extending over a cooperating flange portion of the .
sprayer plate 44 to secure the components in the position shown~
In operation, fuel is introduced into the annular passage 34 where it passes through the passages 40, through the radial ;
passage 46 and to the mixing chamber 54. Air introduced to the ,~
inner tubular member 33 passes through the passages 38 before entering the mixing chamber 54 where it impinges on, or shears~ the fuel in the latter chamber formin~J an emulsion which is then accelerated out oE the atomizer 30 via the discharge passage 52.
It w.ill be apparent that the embodiment oE ~igure 3 enjoys ..
the advantages of the embodiment of Figure 1, to wit, the A,' 1~`
-6- 1 i 1~2190~ 1 ~
!
~'linlina~ion of a p~ ality oE inclivicl~lal, rekltively sm.lll, ~
orifices which are difficult to drill or surface harden, as z described above.
Another alternate embodiment of the atomi~er of the present invention is shown in general by the reference 60 in Fig. S , and includes an outer tubular rnember 62 extendincJ over, and in a concentric spaced relationship to, an inner tubular member 64 to defirle a~ annular passage 66. The inner tubular member 64 extends , over a distributor plug 68 and is secured thereto in any known ) manner. Four angularly-spaced through passages 70 ~-two of which are shown in the drawing), along with a threaded central bore 72, 5 are formed through the distrlbutor plug 68. The distributor plug -68 includes an extended diameter, flanged portion 7q, which has a plurality of through passages 76 formed therethrough and registering with the annular passage 66. The passages 76 extend at ~, a slight angle to the horizontal as viewed in Fig. 5 ~nd, although only two are shown in the drawing, it is understood that a plurality, such as eight, are angularly spaced around the axis of the distributor plug 68.
~o ~ discharge plug 78 is provided which has a conical ,portion 80 and a stem portion 8~, the end portion of which is externally threaded Eor extending in the threaded bore 72 of the .
distributor plug 68. r~
1'he flanged portion 74 of the distributor plug 68 has a stepped, tapered discharge end portion 84 which, together with the , outer surEaces of the discharge plug 78 define a continuous annular discharge passage 86. A mixing ch~mber 88 is c~efined at the ar~a ~
where the passages 76 communicate with the discharge passa~e 86. 1:
A tip nut ~0 is in threacled engagement with the outer .
~.~21~02 t~ ar member 6), ..:.ter~ ver ~ fl.antJed portlorl ~4 oE the distributor plug 68, and has a flangecl portion 9na abutting the front ace of the latter flan~ed port;.on to secure the components in the position sllown.
In operation, fuel is introduced into the annul~r passage 66 where it passes through the passages 76 and to the mixiny chamber B8. Air introduced to the inner tubular member 64 passes through the passages 70 before entering the mixing chamber 88 where it impinges on, or shears, the fuel in the latter chamber, form.ing an emulsion which is then accelerated out oE the atomizer 60 via the discharge passaye 86.
It will be apparent that the embodiment of Fig. 5 i8 .
formed by relatively few comporlents, enjoys the advantages of the , embodiments of Figs. 1 and 3, to wit, the elimination of a .
plurality of individual, relatively small, orifices which are difficult to drill or surEace harden, as described above.
Other modifications, changes and substitutions are interlde~ in the foregoing disclosure and in some instances some ~eatures of the invention will be employed without a corresponding use of other features. Accordingly, it is appropriate that the appended claims be construed broadly and in a manner consistent with the spirit ~nd ~cope of the invention therein.
,~, ~B- j -
Claims (5)
1. An atomizer comprising an inner tubular member for receiving a compressible fluid, an outer tubular member extending in a concentrically spaced relation to said inner tubular member to define an annular passage between said members for receiving a liquid fuel, and a plug member extending within the corresponding ends of said members and defining therewith a first annular discharge orifice for the fluid exiting from said inner tubular member, a mixing chamber for mixing said fluid with the fuel discharging from said annular passage, and a second annular discharge orifice for discharging said mixture.
2. The atomizer of claim 1 wherein said end of said inner tubular member is disposed axially inwardly from said end of said outer tubular member.
3. The atomizer of claim 2 wherein said plug member has a conical shape and wherein said corresponding ends are tapered so as to extend substantially parallel to said plug member.
4. The atomizer of claim 1 further comprising a distributor plug disposed in said inner tubular member and having a plurality of through passages for said fluid and a bore for receiving said plug member.
5. The atomizer of claim 4 wherein said bore is in threaded engagement with a corresponding portion of said plug member to movement of said plug member relative to said corresponding ends to permit the sizes of said discharge orifices and said mixing chamber to be selectively varied.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US50089783A | 1983-06-03 | 1983-06-03 | |
| US500,897 | 1983-06-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1221902A true CA1221902A (en) | 1987-05-19 |
Family
ID=23991387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000455579A Expired CA1221902A (en) | 1983-06-03 | 1984-05-31 | Twin fluid atomizer |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0128805A3 (en) |
| JP (1) | JPS6086315A (en) |
| CA (1) | CA1221902A (en) |
| SE (1) | SE8402928L (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4655395A (en) * | 1984-04-17 | 1987-04-07 | The Babcock & Wilcox Company | Adjustable conical atomizer |
| DE3525161A1 (en) * | 1985-03-05 | 1986-09-11 | DFVLR-Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln | METHOD AND DEVICE FOR LOW-WEAR SPRAYING OF LIQUID, HIGH-VISCOSITY AND / OR SUSPENSIVE FUELS FOR COMBUSTION OR GASIFICATION IN BURNER FLAMES |
| CA1277585C (en) * | 1986-11-13 | 1990-12-11 | Adam J. Bennett | Atomizing nozzle assembly |
| DE19511272A1 (en) * | 1995-03-27 | 1996-10-02 | Acheson Ind Deutschland Zweign | Two-substance spray nozzle, in particular for a spray element of a spraying tool of a form spraying device, and nozzle exchange arrangement for two-substance spray nozzles |
| US8070483B2 (en) | 2007-11-28 | 2011-12-06 | Shell Oil Company | Burner with atomizer |
| JP7585745B2 (en) * | 2020-11-30 | 2024-11-19 | 新東工業株式会社 | Nozzle, developing device, and processing method for processed object |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1799551A (en) * | 1929-04-01 | 1931-04-07 | Forney Comb Engineering Compan | Oil and steam burner nozzle |
| GB386181A (en) * | 1931-04-10 | 1933-01-12 | Devilbiss Co | Improvement in spray head |
| US2089673A (en) * | 1935-07-22 | 1937-08-10 | Steinmann Karl | Oil atomizer |
| US2414459A (en) * | 1944-01-28 | 1947-01-21 | Babcock & Wilcox Co | Fluid fuel burner apparatus |
| FR1032139A (en) * | 1951-02-07 | 1953-06-30 | mobile spraying equipment for oil burners | |
| US3072344A (en) * | 1960-12-19 | 1963-01-08 | Babcock & Wilcox Ltd | Unitary y-jet spray head assembly |
| FR1310697A (en) * | 1961-10-20 | 1962-11-30 | Chiron Werke Gmbh | Nozzle for atomizing or spraying liquid products |
| US3363840A (en) * | 1964-05-25 | 1968-01-16 | Babcock & Wilcox Ltd | Liquid fuel burners |
| NL7015687A (en) * | 1970-10-26 | 1971-02-25 | ||
| JPS5141693B1 (en) * | 1971-05-24 | 1976-11-11 | ||
| US3739990A (en) * | 1971-10-15 | 1973-06-19 | Combustion Eng | Atomizing burner nozzle tip |
| US3807932A (en) * | 1973-04-17 | 1974-04-30 | J Dewald | Method and apparatus for combustion of oil |
| DE2823253A1 (en) * | 1977-11-30 | 1979-05-31 | Bisa Karl | Aerosol and foam generator - with radial blowing agent jets diverted into annular gap with entrained material |
| JPS5616020A (en) * | 1979-07-17 | 1981-02-16 | Babcock Hitachi Kk | Burner device |
-
1984
- 1984-05-28 EP EP84401086A patent/EP0128805A3/en not_active Withdrawn
- 1984-05-30 SE SE8402928A patent/SE8402928L/en not_active Application Discontinuation
- 1984-05-31 CA CA000455579A patent/CA1221902A/en not_active Expired
- 1984-06-01 JP JP11108484A patent/JPS6086315A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0128805A2 (en) | 1984-12-19 |
| SE8402928D0 (en) | 1984-05-30 |
| SE8402928L (en) | 1984-12-04 |
| JPS6086315A (en) | 1985-05-15 |
| EP0128805A3 (en) | 1986-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |