CA1228013A - Mix atomizer - Google Patents
Mix atomizerInfo
- Publication number
- CA1228013A CA1228013A CA000433654A CA433654A CA1228013A CA 1228013 A CA1228013 A CA 1228013A CA 000433654 A CA000433654 A CA 000433654A CA 433654 A CA433654 A CA 433654A CA 1228013 A CA1228013 A CA 1228013A
- Authority
- CA
- Canada
- Prior art keywords
- mixing chamber
- liquid
- gas
- mix
- atomizer
- 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
-
- 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
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles (AREA)
Abstract
Abstract of the Disclosure MIX ATOMIZER
Mix atomizer for the atomization of a liquid with gas com-prising a first mixing chamber provided with inlet means for a liquid and primary gas, and debouching into a second mixing chamber being wider than the first mixing chamber, means for tangentially supplying secondary gas around the mixture of liquid and primary gas from the first mixing chamber, the second mixing chamber de-bouching in its turn into an outlet nozzle being substantially narrower than the second mixing chamber. The invention further re-lates to an apparatus provided with a plurality of such mix atomizers and having a common liquid supply channel and a common gas supply channel.
Mix atomizer for the atomization of a liquid with gas com-prising a first mixing chamber provided with inlet means for a liquid and primary gas, and debouching into a second mixing chamber being wider than the first mixing chamber, means for tangentially supplying secondary gas around the mixture of liquid and primary gas from the first mixing chamber, the second mixing chamber de-bouching in its turn into an outlet nozzle being substantially narrower than the second mixing chamber. The invention further re-lates to an apparatus provided with a plurality of such mix atomizers and having a common liquid supply channel and a common gas supply channel.
Description
l~æ~ 3 MIX AToMIZER
m e invention relates to a mix atomizer for the atomization of a liquid with gas. m e invention further relates to an apparatus for the atomization of a liquid, which apparatus is provided with a plurality of such mix atomizers.
m e term liquid is taken throu~hout the specification and claLms also to include dispersions of solid particles in a liquid and emLlsions.
Atomizers are applied on a large scale in combustion engineering, especi~lly for atomizing heavy liquid fuel, to promote intensive contact of liquid with ccmtwstinn air for a proper combustion. In an atomizer liquid fuel is brcken up into very small droplets which droplets may be subsequently mixed with oxygen or an oxygen-containing gas, for example air, in a combustion chamber for combustion of the fuel. Abomization is normally effected by QUsing a liquid to spurt undes pressure frcm one or more orifi oe s with special shap~ and dimensions.
Addition of a gas, for example steam, to the liquid ~n the abcmizer itself yromotes the atamizaticn of the liquid. An atomizer wherein gas is added to the liquid to be atomized is m the specification and claims in~icated with the expression m~x atomizer. ~hen a fuel is to be atom~-ed it is of importance to generate sprays of liquid droplets which are substantially uniformly distributed over the outlet area of the atamizer, in order to promote an optim21 oo~bustion of the liquid in the oo~bustion chamber.
Although the elucidation of the present inventicn to be given heseinafter will deal mainly with steam atomization of liquid, such as oil, it is explicitly stated here that the application of the proposed atamizer is not restricted thereto.
8~3 Steam may be replaced by, for example, air or refinery fuel gas.
m e steam may also be saturated to wet. Apart from application in combustion installations atomizers of the proposed type can also be used in spraying installations, for instance, for the purpose of the vaporization of a volatile c~onent.
m e object of the present invention in to provide a mix atomizer for the atomization of a liquid with a gas which apparatus is so designed that the velocity and flux of the liquid leaving the atomizer during operation are substantially uniformly distributed over the outlet area of the atomizer, in order to generate hcm~g#ne~s liquid sprays, promoting optimal use of the liquid for combustion or other purposes.
m e mix atomizer for the atomizatiQn of a liquid with gas according to the invention thereto comprises a first mixIng chamber provided with inlet ~eans for supplying a liquid and primary gas to form a mixture of liquid and gas, said first mixing chamber debouching into a second mixing cha~ber having crDss-sectional areas being substanti~lly larger than the cross-sectional areas of the first nux m g ch2mber, means for tangentially supplying secondary gas around the mixtLre of liq~id and gas passing through the secGnd mixing chamber during operatiQn, the second mixing chamber debauching into an outlet nozzle, having cross-sectional areas being substantially snaller than the cross-sectional areas of the second mixing chamber, the first mixing chamber, the seoond nixlng chamber, and the outlet nozzle having substan~ y coinciding longitudinal axes.
In a suitable embodiTent of the inve~tion a plurality of the abcwe-mentioned atcmizers are oombined in a single apparatus for atomization of a liquid, said apparatus having a single liquid supply and a single gas supply serving the plurality of mix atomizers.
The invention therefore further relates to an apparatus for the atomization of a liquid with gas, comprising a member havinq a longitudinal axis and being internally provided with a plurality 8(~13 of mux atGmizers according to the invention, terminating at the outer surface of a head of the member, the member being inter-nally prGvided with one liquid supply channel and one gas supply channel, first passages forming fluid coomunications between the liquid supply channel and the first mixlng chambers of the mix atomizers, second passages for supplytng primary gas from the gas supply channel into said first muxing chambers, and third passages for tangentially supplying secondary qas from the gas supply channel into the second muxing chambers of the mux atcmizers m e invention will now be described by way of example only in more detail with reference to the acccmpanying drawings, in which Figure 1 shows a longitudinal section of a mix atomizer according to the invention.
Figure 2 shows a longitudinal section of an apparatus for the atomazation of a liquid prcvided with a plurality of mux atomizers accvrding to the invention, and Eigure 3 shows a top view of the apparatus shcwn Ln Figure 2.
Figure 1 shcws a mix atomizer, generally indicated by reference numeral 1, for atomizing a liquid, such as a heavy liquid fuel, with a gas. The mix atcmizer 1 has as main c ~ ents a first muxing chamber 2, a second chamber 3 being Ln fluid ccnm~nication with the f~rst muxing chamber 2, and an c~tlet nozzle 4 ccnnected with the seccnd mixing chamber 3.
These three components have substanti~lly coinciding longitur dinal axes, while the c~vss-secticnal areas of the seccnd mux1ng chamber 3 and those of the cutlet nozzle 4 are koth substan-tially l~rger than the cross-sectional reas of the fir5t mixLng chæmber 2. FUrthOE, the cross-sectional areas of the outlet nozzle 4 are chosen small r than the cross-sectional areæs of the second mixIng ch3mber 3. Channels 5 and 6 æ e arranged in the atcnuzer for supplying a liquid to be atomized and atomizing lZ~8(~13 gas, respectively, m to the first muxing chamber 2 at or near the free end thereof. The channels 5 and 6 are positioned at an angle with respect to one another to promote intensive break-up of the liquid flow issuing frnm channel 5 by the gasflow from channel 6.
For supplying gas into the second mux mg chamber 3 the mux atomizer is provided with a ring-shaped channRl 7 with passages 8 formlng fluid com~unications between the channel 7 and said muxing chamber 3. These passages 8, being preferably unifor~ly distributed over the cir,cumference of the second mixing chamber 3, are so positioned with respect to said second mixing cha~ber that gas from the ring-shaped channel 7 is tangentially intro-duced into said mixIng chamber 3.
Downstre~m of the rinq-shaped channel 7 the second mixing chamber 3 has a substantially frusto-co.nic~lly shaped side wall 9 tapering towards the outlet nozzle 4 thereby prcviding a smcoth guiding for fluid from the channel 7 and the passages 8 towards the outlet nozzle 4.
During operation of the mix atomizer shown in Figure 1 for the atomizatian of liquid fuel with st~n, the liquid to be atanized and steam are introduced into the f~rst snixing chamber
m e invention relates to a mix atomizer for the atomization of a liquid with gas. m e invention further relates to an apparatus for the atomization of a liquid, which apparatus is provided with a plurality of such mix atomizers.
m e term liquid is taken throu~hout the specification and claLms also to include dispersions of solid particles in a liquid and emLlsions.
Atomizers are applied on a large scale in combustion engineering, especi~lly for atomizing heavy liquid fuel, to promote intensive contact of liquid with ccmtwstinn air for a proper combustion. In an atomizer liquid fuel is brcken up into very small droplets which droplets may be subsequently mixed with oxygen or an oxygen-containing gas, for example air, in a combustion chamber for combustion of the fuel. Abomization is normally effected by QUsing a liquid to spurt undes pressure frcm one or more orifi oe s with special shap~ and dimensions.
Addition of a gas, for example steam, to the liquid ~n the abcmizer itself yromotes the atamizaticn of the liquid. An atomizer wherein gas is added to the liquid to be atomized is m the specification and claims in~icated with the expression m~x atomizer. ~hen a fuel is to be atom~-ed it is of importance to generate sprays of liquid droplets which are substantially uniformly distributed over the outlet area of the atamizer, in order to promote an optim21 oo~bustion of the liquid in the oo~bustion chamber.
Although the elucidation of the present inventicn to be given heseinafter will deal mainly with steam atomization of liquid, such as oil, it is explicitly stated here that the application of the proposed atamizer is not restricted thereto.
8~3 Steam may be replaced by, for example, air or refinery fuel gas.
m e steam may also be saturated to wet. Apart from application in combustion installations atomizers of the proposed type can also be used in spraying installations, for instance, for the purpose of the vaporization of a volatile c~onent.
m e object of the present invention in to provide a mix atomizer for the atomization of a liquid with a gas which apparatus is so designed that the velocity and flux of the liquid leaving the atomizer during operation are substantially uniformly distributed over the outlet area of the atomizer, in order to generate hcm~g#ne~s liquid sprays, promoting optimal use of the liquid for combustion or other purposes.
m e mix atomizer for the atomizatiQn of a liquid with gas according to the invention thereto comprises a first mixIng chamber provided with inlet ~eans for supplying a liquid and primary gas to form a mixture of liquid and gas, said first mixing chamber debouching into a second mixing cha~ber having crDss-sectional areas being substanti~lly larger than the cross-sectional areas of the first nux m g ch2mber, means for tangentially supplying secondary gas around the mixtLre of liq~id and gas passing through the secGnd mixing chamber during operatiQn, the second mixing chamber debauching into an outlet nozzle, having cross-sectional areas being substantially snaller than the cross-sectional areas of the second mixing chamber, the first mixing chamber, the seoond nixlng chamber, and the outlet nozzle having substan~ y coinciding longitudinal axes.
In a suitable embodiTent of the inve~tion a plurality of the abcwe-mentioned atcmizers are oombined in a single apparatus for atomization of a liquid, said apparatus having a single liquid supply and a single gas supply serving the plurality of mix atomizers.
The invention therefore further relates to an apparatus for the atomization of a liquid with gas, comprising a member havinq a longitudinal axis and being internally provided with a plurality 8(~13 of mux atGmizers according to the invention, terminating at the outer surface of a head of the member, the member being inter-nally prGvided with one liquid supply channel and one gas supply channel, first passages forming fluid coomunications between the liquid supply channel and the first mixlng chambers of the mix atomizers, second passages for supplytng primary gas from the gas supply channel into said first muxing chambers, and third passages for tangentially supplying secondary qas from the gas supply channel into the second muxing chambers of the mux atcmizers m e invention will now be described by way of example only in more detail with reference to the acccmpanying drawings, in which Figure 1 shows a longitudinal section of a mix atomizer according to the invention.
Figure 2 shows a longitudinal section of an apparatus for the atomazation of a liquid prcvided with a plurality of mux atomizers accvrding to the invention, and Eigure 3 shows a top view of the apparatus shcwn Ln Figure 2.
Figure 1 shcws a mix atomizer, generally indicated by reference numeral 1, for atomizing a liquid, such as a heavy liquid fuel, with a gas. The mix atcmizer 1 has as main c ~ ents a first muxing chamber 2, a second chamber 3 being Ln fluid ccnm~nication with the f~rst muxing chamber 2, and an c~tlet nozzle 4 ccnnected with the seccnd mixing chamber 3.
These three components have substanti~lly coinciding longitur dinal axes, while the c~vss-secticnal areas of the seccnd mux1ng chamber 3 and those of the cutlet nozzle 4 are koth substan-tially l~rger than the cross-sectional reas of the fir5t mixLng chæmber 2. FUrthOE, the cross-sectional areas of the outlet nozzle 4 are chosen small r than the cross-sectional areæs of the second mixIng ch3mber 3. Channels 5 and 6 æ e arranged in the atcnuzer for supplying a liquid to be atomized and atomizing lZ~8(~13 gas, respectively, m to the first muxing chamber 2 at or near the free end thereof. The channels 5 and 6 are positioned at an angle with respect to one another to promote intensive break-up of the liquid flow issuing frnm channel 5 by the gasflow from channel 6.
For supplying gas into the second mux mg chamber 3 the mux atomizer is provided with a ring-shaped channRl 7 with passages 8 formlng fluid com~unications between the channel 7 and said muxing chamber 3. These passages 8, being preferably unifor~ly distributed over the cir,cumference of the second mixing chamber 3, are so positioned with respect to said second mixing cha~ber that gas from the ring-shaped channel 7 is tangentially intro-duced into said mixIng chamber 3.
Downstre~m of the rinq-shaped channel 7 the second mixing chamber 3 has a substantially frusto-co.nic~lly shaped side wall 9 tapering towards the outlet nozzle 4 thereby prcviding a smcoth guiding for fluid from the channel 7 and the passages 8 towards the outlet nozzle 4.
During operation of the mix atomizer shown in Figure 1 for the atomizatian of liquid fuel with st~n, the liquid to be atanized and steam are introduced into the f~rst snixing chamber
2. Owing to the iTlpact of the stean flow on the supplied liquid flow, the li~uid flaw is bro3cen up into small liquid frag~nts in the first. miscing chanber 2. The brea}cing up of the liq~lid flaw is pro~ted by causing the steam from the channel 6 to cantact the liquid flaw f~-~.- the channel 5 at an angle. I~e so formed m~re of liqu~d frag~nts and steam enters the second m~xing challb~ 3, where Sff~y stez~n is added at son~c velccity to said m~re. Since the s~dary steam is tangen-tially intra~ at a high velocity into the seccmd mixing chalrber at a wide part thereof, the sec~3ary steam will form an annulus ar ~3d the core forned by the mix ~re of liquid :fL~grl~lts and primary steam frcm the first mlxing ch3mber 2. The ~ajor part of the tangentially introduced steam flows substantial~y Along the frusto-conically shaped wall 9 of the second mixing chamber
3 and follows its way along the wall of the outlet nozzle 4, thereby preventing direct contact of liquid with said wzlls.
Such a contact might easily reduce the velocity of the liquid flowlng close to said walls, resulting in an irregular outflow pattern of the liquid over the outlet nozzle 4.
Since the cross-sectisnal æeas of the outlet nozzle 4 are substantially smaller than the cross-sectional areas of the second mixing cha~ber 3, the velocity of the mixture of steam and liquid fragments is substantially increased in the outlet nozzle
Such a contact might easily reduce the velocity of the liquid flowlng close to said walls, resulting in an irregular outflow pattern of the liquid over the outlet nozzle 4.
Since the cross-sectisnal æeas of the outlet nozzle 4 are substantially smaller than the cross-sectional areas of the second mixing cha~ber 3, the velocity of the mixture of steam and liquid fragments is substantially increased in the outlet nozzle
4, causing a further break-up of the liquid fragments. Owing to the presence of a shield of the tangentially supplied seccn~ry steam the velocity and the density of the liquid fragments over the cross seCtiQn of the outlet zzle 4 will be substan~ ly uniform, which feature enables an effective ccmbustion of the liquid in a not shcwn combwstion chamber arranged dcwnstDeom of the outlet nozzle 4. Upon leaving the mux atomizer the l;quid~
steam mixture will rapidly expand, result mg in the formation of a mist of very fine liq~id droplets in the combusticn space, 20 ' where the liquid droplets are contacted with blast for th~
ccmbustion of the fuel.
Reference is now made to Figures 2 and 3 showing an apparatus for atomizing liquid, which apparatus is prcvided with a plurality of mix atomizers of a type discussed in the above with referen oe to Figure 1.
This atc~ization apparatus ccmprises a memker 10 provided with a central channel 11 for the supply of atcmizatic~ fluid to a plur lity of mix atcmizers 12, and with a concentrically positioned annular channel 13 for the supply of liquid, such as oil, to be atamized. The mix atomizers 12 are arranged in a head 14 of the aFparatus 10.
m e distanoe between the outlet nozzles of adjacent mix atamizers 12 should be chosen sufficiently large to prevent interferen oe between adjacent outflowing streams of liquid ~;Z8(~13 droplets. A suitable arrangement of the mlx atomizers 12 is the one shcwn in Figure 3, wherein the centres of the outlet nozzles of the mlx atomizers 12 are positioned in a circular pattern, and wherein adjacent outlet nozzles are spaced apart from one another at 120 degrees. As shcwn in Figure 2 the head 14 of the apparatus 10 is frusto-ccnically shaped whereas the mix atomizers 12 are arranged perpendicular to the outer surfa oe of said head 14. m is arrange~.ent enables the application of more mux atomizers without the risk of interference between adjacent mux atomizers than possible when using an apparatus having a flat head and the mix auomizers being arranged perpendicular tD the flat outer surface of the hP~d.
Each mix atomizer 12 is prGvided with a first muxing chamber 15, a second muxing ch2mber 16 and an outlet nozzle 17, wherein the second mux m g chamber 16 is substantiaily wi~Pr than the first moxing chamber 15. m e first mixlng cha~ber 15, the second muxing chalber 16 and the outlet nozzle 17 of eash mix atomizer 12 have coinciding longitudinal axes, positioned perpendicular to the frusto-conically shaped outer surfaoe of head 14.
For supplying primary abomization fluid to the mox atamizers 12, a plurality of passages 18 are provided formong fluid communications ~etween the central channel 11 and the f~rSt mix;ng ~ s 15. Sec~ndbry atcmization fluid is supplied via tangentially arranged passages 19 to the seoond m~xing chsmbers 16 of the mix atamizers 12. These pas a~es 19 form fluid commL m caticns !between the mix atomizers 12 and a substanti~lly ring-sh2ped channel 20 cconectcd to the oe ntral channel 11 via a passage 21. For the supply of seccndary 3o atomization fluid to the mux atamizers 12 via tangenti~lly arranged p2ssages 19 as shcwn in Fiqure 2, the ring-shaped channel 20 surrounds the m~x abomizers 12.
Fluid to be atomized i9 supplied to the first mixing chambers 15 of the ~ix abomizers 12 via a plurality of passsges 22 forming a fluid communication between the annular liquid .~
channel 13 and the first muxing chambers 15.
The operation of the apparatus shown in Figures 2 and 3 is substantially the same as discussed with reference tc the separate mix atamizer shown in Figure l. When using the apparatus shown in Figures 2 and 3 for the atomization of oil with steam, the mlx atomizers 12 are supplied with oil and steam via a common liquid supply, viz. annular channel 13, and a common steam supply, viz. central channel 11, respectively.
It shculd be noted that the present invention is not restricted to mox atomizers having second mixing chambers with frusto-conically shaped walls downstream of the seoondary steam inlets. Instead ~hereof, other shapes of tapering walls may be applied, pro~ided that there is a smooth passage for the secondary steam from the seccnd]ry steam inlets to the autlet nozzle of the mix atomizer, guaranteeing ~hat the soc~od~ry steam will form a shield flowing alang the walls of the seoond mixing chamber and the outlet nozzle.
Althcugh in the embodimcnts shown the mux atomizers are provided with oentral pri~ary ste~m inlets in ccmbination with side inlets for liquid, these inlets may also be cthcnwi~e arranged, for example a oc~bination of central liquid inlets with side primary steam inlets may be chosen for.
Further, the i~vention is not restricted to an apparatus with mix atomizers having the particular arrangement of a centr~l steæm channel and an annular liq~id channel ~ shown in Fig~re 2. Any o~her suitable arrangement may be applied, provided that the mix atomiz 0 can be supplied with steam and liquid frcm a comman steam channel and a oc~mon liquid channel, respectively.
F;nAlly, it is noted that the Lnvention is not restricted to an ap~aratus for atomization of a liquid having a frusto-oonically shaped h~d. Instead thereof the apparatus can be prcvided with a flat-shaped head. With such a head the mix atcmizers are preferably arranged at an acute angle with respect to the cuter surface of the head having their cutlet nozzles pointing away fr~-, one another to enable the positioning of a relatively large number of mix atomizers in the apparatus without the risk of interference between the fluid flows issuing from the atomizers dur mg operation.
steam mixture will rapidly expand, result mg in the formation of a mist of very fine liq~id droplets in the combusticn space, 20 ' where the liquid droplets are contacted with blast for th~
ccmbustion of the fuel.
Reference is now made to Figures 2 and 3 showing an apparatus for atomizing liquid, which apparatus is prcvided with a plurality of mix atomizers of a type discussed in the above with referen oe to Figure 1.
This atc~ization apparatus ccmprises a memker 10 provided with a central channel 11 for the supply of atcmizatic~ fluid to a plur lity of mix atcmizers 12, and with a concentrically positioned annular channel 13 for the supply of liquid, such as oil, to be atamized. The mix atomizers 12 are arranged in a head 14 of the aFparatus 10.
m e distanoe between the outlet nozzles of adjacent mix atamizers 12 should be chosen sufficiently large to prevent interferen oe between adjacent outflowing streams of liquid ~;Z8(~13 droplets. A suitable arrangement of the mlx atomizers 12 is the one shcwn in Figure 3, wherein the centres of the outlet nozzles of the mlx atomizers 12 are positioned in a circular pattern, and wherein adjacent outlet nozzles are spaced apart from one another at 120 degrees. As shcwn in Figure 2 the head 14 of the apparatus 10 is frusto-ccnically shaped whereas the mix atomizers 12 are arranged perpendicular to the outer surfa oe of said head 14. m is arrange~.ent enables the application of more mux atomizers without the risk of interference between adjacent mux atomizers than possible when using an apparatus having a flat head and the mix auomizers being arranged perpendicular tD the flat outer surface of the hP~d.
Each mix atomizer 12 is prGvided with a first muxing chamber 15, a second muxing ch2mber 16 and an outlet nozzle 17, wherein the second mux m g chamber 16 is substantiaily wi~Pr than the first moxing chamber 15. m e first mixlng cha~ber 15, the second muxing chalber 16 and the outlet nozzle 17 of eash mix atomizer 12 have coinciding longitudinal axes, positioned perpendicular to the frusto-conically shaped outer surfaoe of head 14.
For supplying primary abomization fluid to the mox atamizers 12, a plurality of passages 18 are provided formong fluid communications ~etween the central channel 11 and the f~rSt mix;ng ~ s 15. Sec~ndbry atcmization fluid is supplied via tangentially arranged passages 19 to the seoond m~xing chsmbers 16 of the mix atamizers 12. These pas a~es 19 form fluid commL m caticns !between the mix atomizers 12 and a substanti~lly ring-sh2ped channel 20 cconectcd to the oe ntral channel 11 via a passage 21. For the supply of seccndary 3o atomization fluid to the mux atamizers 12 via tangenti~lly arranged p2ssages 19 as shcwn in Fiqure 2, the ring-shaped channel 20 surrounds the m~x abomizers 12.
Fluid to be atomized i9 supplied to the first mixing chambers 15 of the ~ix abomizers 12 via a plurality of passsges 22 forming a fluid communication between the annular liquid .~
channel 13 and the first muxing chambers 15.
The operation of the apparatus shown in Figures 2 and 3 is substantially the same as discussed with reference tc the separate mix atamizer shown in Figure l. When using the apparatus shown in Figures 2 and 3 for the atomization of oil with steam, the mlx atomizers 12 are supplied with oil and steam via a common liquid supply, viz. annular channel 13, and a common steam supply, viz. central channel 11, respectively.
It shculd be noted that the present invention is not restricted to mox atomizers having second mixing chambers with frusto-conically shaped walls downstream of the seoondary steam inlets. Instead ~hereof, other shapes of tapering walls may be applied, pro~ided that there is a smooth passage for the secondary steam from the seccnd]ry steam inlets to the autlet nozzle of the mix atomizer, guaranteeing ~hat the soc~od~ry steam will form a shield flowing alang the walls of the seoond mixing chamber and the outlet nozzle.
Althcugh in the embodimcnts shown the mux atomizers are provided with oentral pri~ary ste~m inlets in ccmbination with side inlets for liquid, these inlets may also be cthcnwi~e arranged, for example a oc~bination of central liquid inlets with side primary steam inlets may be chosen for.
Further, the i~vention is not restricted to an apparatus with mix atomizers having the particular arrangement of a centr~l steæm channel and an annular liq~id channel ~ shown in Fig~re 2. Any o~her suitable arrangement may be applied, provided that the mix atomiz 0 can be supplied with steam and liquid frcm a comman steam channel and a oc~mon liquid channel, respectively.
F;nAlly, it is noted that the Lnvention is not restricted to an ap~aratus for atomization of a liquid having a frusto-oonically shaped h~d. Instead thereof the apparatus can be prcvided with a flat-shaped head. With such a head the mix atcmizers are preferably arranged at an acute angle with respect to the cuter surface of the head having their cutlet nozzles pointing away fr~-, one another to enable the positioning of a relatively large number of mix atomizers in the apparatus without the risk of interference between the fluid flows issuing from the atomizers dur mg operation.
Claims (10)
PROPERTY OF PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Mix atomizer for the atomization of a liquid with gas, comprising a first mixing chamber provided with inlet means for supplying a liquid and primary gas to form a mixture of liquid and gas, said first mixing chamber debouching into a second mixing chamber having cross-sectional areas being substantially larger than the cross-sectional areas of the first mixing chamber, means for tangentially supplying secondary gas around the mixture of liquid and gas passing through the second mixing chamber during operation, the second mixing chamber debouching into an outlet nozzle having cross-sectional areas being substantially smaller than the cross-sectional areas of the second mixing chamber, the first mixing chamber, the second mixing chamber and the outlet nozzle having substantially coinciding longitudinal axes.
2. Mix atomizer as claimed in claim 1, wherein the first mixing chamber is provided with separate inlet means for the liquid and primary gas, the inlet means being inclined towards one another.
3. Mix atomizer as claimed in claim 1 or 2, wherein the second mixing chamber is provided with a tapering wall portion for smoothly guiding secondary gas to the outlet nozzle.
4. Mix atomizer as claimed in any one of the claims 1-3, wherein the mix atomizer is provided with a plurality of tangen-tially disposed passages for tangentially supplying secondary gas into the second mixing chamber, said passages being substantially uniformly distributed over the circumference of the second mixing chamber.
5. Mix atomizer as claimed in claim 1, wherein the cross-sectional areas of the outlet nozzle are sub-stantially larger than the cross-sectional areas of the first mixing chamber.
6. Apparatus for the atomization of a liquid with gas, comprising a member having a longitudinal axis and being internal-ly provided with a plurality of mix atomizers as claimed in claim 1, terminating at the outer surface of a head of the member, the member being internally provided with one liquid supply channel for liquid and one gas supply channel, first passages forming fluid communications between the liquid supply channel and the first mixing chambers of the mix atomizers, second passages for supplying primary gas from the gas supply channel into said first mixing chambers and third passages for tangentially supplying secondary gas from the gas supply channel into the second mixing chambers of the mix atomizers.
7. Apparatus as claimed in claim 6, wherein the centres of the outlet nozzles are positioned in a circular pattern substan-tially equally spaced apart from one another.
8. Apparatus as claimed in claim 6 or 7, wherein the head of the member has a substantially frusto-conically shaped outer surface, the mix atomizers being arranged substantially perpendic-ular to said outer surface.
9. Apparatus as claimed in claim 6 or 7, wherein the head of the member has a substantially flat outer surface, the mix atomizers being arranged at an acute angle with respect to the outer surface of the head and having their outlet nozzles pointing away from one another.
10. Apparatus as claimed in claim 6, wherein one of the supply channels is substantially centrally arranged in the member, and the other supply channel is ring-shaped, the supply channels having substantially coinciding longitudinal axes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8222903 | 1982-08-09 | ||
| GB8222903 | 1982-08-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1228013A true CA1228013A (en) | 1987-10-13 |
Family
ID=10532201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000433654A Expired CA1228013A (en) | 1982-08-09 | 1983-07-29 | Mix atomizer |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0101109B1 (en) |
| JP (1) | JPS5952557A (en) |
| CA (1) | CA1228013A (en) |
| DE (1) | DE3376053D1 (en) |
| NZ (1) | NZ205182A (en) |
| ZA (1) | ZA835789B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3762288D1 (en) * | 1987-02-13 | 1990-05-17 | Bbc Brown Boveri & Cie | SPRAYER NOZZLE. |
| FR2641365B1 (en) * | 1988-12-30 | 1991-12-13 | Pillard Chauffage | METHODS AND DEVICES FOR FINELY SPRAYING A LIQUID FUEL AND BURNERS PROVIDED WITH SUCH DEVICES |
| DE4238736A1 (en) * | 1992-11-17 | 1994-05-19 | Babcock Feuerungssysteme | Atomizer for an oil burner |
| IT1289191B1 (en) * | 1997-01-23 | 1998-09-29 | Leitner Spa | CANNON FOR THE PRODUCTION OF SNOW |
| EP2110601A1 (en) | 2008-04-15 | 2009-10-21 | Siemens Aktiengesellschaft | Burner |
| FR2947191B1 (en) * | 2009-06-30 | 2012-08-24 | Klipair | DIPHASIC SPRAY NOZZLE AND NEBULIZING APPARATUS HAVING THE SAME |
| RU2445172C2 (en) * | 2010-05-25 | 2012-03-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кузбасский государственный технический университет имени Т.Ф. Горбачева" (КузГТУ) | Fluid spraying nozzle |
| CN108126460A (en) * | 2017-12-20 | 2018-06-08 | 姚舜 | Dirty method for gas purification based on ultrasonic atomizatio |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH102855A (en) * | 1922-11-11 | 1924-01-02 | Haag Hermann | Method and device for atomizing liquid fuels. |
| US2764455A (en) * | 1953-11-23 | 1956-09-25 | Alfred F Seibel | Vaporizing and mixing unit |
| FR1245788A (en) * | 1958-11-06 | 1960-11-10 | Rorep Soc De Personnes A Respo | Liquid fuel burner |
| US3072344A (en) * | 1960-12-19 | 1963-01-08 | Babcock & Wilcox Ltd | Unitary y-jet spray head assembly |
-
1983
- 1983-07-12 DE DE8383201033T patent/DE3376053D1/en not_active Expired
- 1983-07-12 EP EP83201033A patent/EP0101109B1/en not_active Expired
- 1983-07-29 CA CA000433654A patent/CA1228013A/en not_active Expired
- 1983-08-08 ZA ZA835789A patent/ZA835789B/en unknown
- 1983-08-08 NZ NZ205182A patent/NZ205182A/en unknown
- 1983-08-08 JP JP58144856A patent/JPS5952557A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| EP0101109A3 (en) | 1985-05-22 |
| ZA835789B (en) | 1984-04-25 |
| JPS5952557A (en) | 1984-03-27 |
| EP0101109A2 (en) | 1984-02-22 |
| DE3376053D1 (en) | 1988-04-28 |
| NZ205182A (en) | 1985-12-13 |
| EP0101109B1 (en) | 1988-03-23 |
| JPH0315491B2 (en) | 1991-03-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |