CN102878557A - Pre-coating medium atomizing nozzle - Google Patents
Pre-coating medium atomizing nozzle Download PDFInfo
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- CN102878557A CN102878557A CN201110191404XA CN201110191404A CN102878557A CN 102878557 A CN102878557 A CN 102878557A CN 201110191404X A CN201110191404X A CN 201110191404XA CN 201110191404 A CN201110191404 A CN 201110191404A CN 102878557 A CN102878557 A CN 102878557A
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Abstract
The invention relates to a pre-coating medium atomizing nozzle, which is specifically made as a fuel oil atomizing nozzle for combustors (machines) and belongs to the field of industrial combustion; the pre-coating medium atomizing nozzle comprises a conical bluff body, a lip opening, an air shield, a whirlcone, a nozzle joint, a fuel oil pipe, atomizing medium pipes and the like, wherein fuel oil forms oil films rotated in a high speed through the whirlcone and are moved forwardly in a rotating manner by attaching to the inner wall of the lip opening; the fuel oil is sprayed in the high speed from a contracted-gradually annular gap between the lip opening and the conical bluff body; atomizing medium is divided into two paths; one path enters a central atomizing medium pipe and is sprayed at the high speed from the contracted-gradually annular gap between the lip opening and the conical bluff body; the other path of the atomizing medium can inject peripheral air to enter a nozzle; or the other path of the atomizing medium can be supplied into the other atomizing medium pipe and is sprayed at the high speed from the contracted-gradually annular gap between the air shield and the lip opening; and the fuel oil can be unstabilized quickly and is atomized into small-aperture oil mist under the high-speed impact of inner path and outer path of atomizing medium, shearing action and impulse friction action of the atomizing medium in the nozzle on the oil films. According to the invention, the pre-coating medium atomizing nozzle is characterized by simple structure, good atomizing effect, large regulation ratio, convenient regulation, and reasonable atomizing angle.
Description
Technical field
The present invention relates to pre-membrane type medium atomization nozzle, be specially adapted to the fuel atomizer as burner (machine) usefulness, belong to energy source and power and industrial combustion field, also can be used for the techniques such as dedusting, desulfurization.
Background technology
In the industrial fuel oil combustion apparatus, atomizer is core component, directly affects the service behaviour of oil inflame equipment.Widely used atomizer can be divided into mechanical type (or claiming the simple pressure formula) atomizer and medium atomization nozzle two large classes substantially in the engineering at present, wherein the mechanical type atomizer requires the fuel pressure of nozzle inlet high, atomizing effect is good not as the medium atomization nozzle, adjusting is smaller and Flow-rate adjustment is loaded down with trivial details, therefore uses extensively not as the latter.So-called medium atomization nozzle namely utilizes phase mutual friction, the impact of fuel oil and atomizing medium (compressed air or steam), overcome fuel gauge surface tension, viscous force and inertia force, the fuel oil fragmentation is atomized into a large amount of small drops, the fuel gauge area is increased greatly, thereby be conducive to rapidly effectively burning of fuel oil.
Common medium atomization nozzle has internal-mixing in the engineering at present, middle hybrid (or claiming y-type nozzle), the three basic structures forms such as exterior mixing, because the defective on these three kinds of these body structures of nozzle and the principle, so that these three kinds of nozzles exist respectively different shortcomings, wherein, the fuel oil that internal-mixing medium atomization nozzle and middle hybrid (Y type) medium atomization nozzle ejection go out-atomizing medium mixture is the multiple jets form, this just so that fuel droplet at the circumferencial direction skewness, local rich oil district appears, and the internal-mixing medium atomization nozzle accident conditions that easily causes oil gas (vapour) to alter mutually; Exterior mixing medium atomization nozzle air consumption is large, and fuel oil sprays from nozzle center, and atomizing medium sprays from fuel oil is peripheral, thereby atomizing angle is little, and the fuel droplet that easily will atomize regroups together deterioration atomizing effect, ignition difficulties.Above three kinds of medium atomization nozzles, atomizing medium all interacts with the fuel oil of fluid column form, contact area is less, the relative velocity of atomizing medium and fuel oil is less, because at this moment viscous force, surface tension and the inertia force of fuel oil fluid column are larger, atomizing medium is to the force limited of fuel oil, and is not fully utilized, and all exists irrationality on principle and the structure.
The comprehensive advantage that has all types of atomizers now, overcome its shortcoming, design from principle and structure optimization nozzle, for being delivered to fuel oil from atomizing medium, energy provides best condition, total guiding theory is: the relative velocity of atomizing medium and fuel oil is large, turbulence level is strong, fuel oil revolved the generate film and oil film thin, large with the atomizing medium contact area, atomizing angle is reasonable, Flow-rate adjustment is convenient, gas (vapour) consumption rate is low, thereby greatly improve fuel atomization effect, improve efficiency of combustion, reduce energy consumption and pollutant discharge amount, for realizing this purpose, patent of the present invention is proposed.
Summary of the invention
Technical problem: the objective of the invention is for the principle that exists in the prior art and structural deficiency, provide a kind of simple in structure, atomizing effect good, atomizing angle is reasonable, Flow-rate adjustment pre-membrane type medium atomization nozzle easily.
Technical scheme: pre-membrane type medium atomization nozzle of the present invention comprises taper bluff body, lip, airhood, cyclone, nozzle connection, fuel pipe, atomizing medium pipe etc.
The fuel pipe of fuel oil outside the atomizing medium pipe of center enters, via the fuel hole on the nozzle connection 4. with cyclone on the eddy flow groove 2., under the effect of fuel pressure, form the oil film of high speed rotary motion, pasting the rotation of lip inwall and advancing, spraying at a high speed from the tapering type annulus between lip and taper bluff body.Atomizing medium is divided into two-way, and one road atomizing medium pipe from the center enters, and through the atomizing medium hole on nozzle connection and the cyclone 3., sprays at a high speed from the tapering type annulus between lip and taper bluff body; Another road atomizing medium has two kinds of implementations, can utilize the kinetic energy of the fuel oil that goes out from the tapering type annulus high velocity jet between taper bluff body and the lip-atomizing medium mixture, cause the local depression district, static air around the injection, this part is had perforation airhood 1. by the air of injection via the periphery and sprays at a high speed from the tapering type annulus between airhood and lip, forms the second road atomizing medium; Also can establish in addition again an atomizing medium pipe in the outside of fuel pipe, atomizing medium via the outer atomizing medium of nozzle connection hole 6. with lip atomizing medium hole 5., enter the peripheral airhood of not offering perforation, spray at a high speed from the tapering type annulus between airhood and lip, form the second road atomizing medium.
Constantly accelerate in the tapering type annulus of atomizing medium between lip and taper bluff body that the center feeds, because atomizing medium is turbulent condition, before not going out from nozzle ejection, constantly carrying out the pulsation friction to being attached at the oil film that rotatablely moves on the lip inwall, increased the turbulence level on oil film surface, this part panting action power is gone out the atomizing of rear unstability for oil film from nozzle ejection and is played an important role, constantly accelerate in the tapering type annulus between lip and taper bluff body along with oil film and atomizing medium, oil film is drawn thinner and thinner under the shear action of atomizing medium, to nozzle exit, inside and outside two-way atomizing medium is to the oil film high speed impact, shear, add that still air is to the friction of fuel oil-atomizing medium mixture and the pulsation unstability of oil film itself on every side, fuel oil is rapidly atomized into fine oil mist.
Technique effect: the present invention passes through the reasonable combination to the size of the tapering type annulus between tapering type annulus, airhood and lip between cyclone, lip and taper bluff body, fuel oil is revolved the generate film in advance, greatly increased the contact area of atomizing medium and fuel oil, strengthened turbulence level, utilize inside and outside two-way atomizing medium to oil film high speed impact and shearing, fuel oil is rapidly atomized into the minimum mist of oil of particle diameter, has greatly improved the atomizing effect of fuel oil on principle and the structure; Mist of oil is tapered to be sprayed at a high speed from nozzle, has overcome the prior art mist of oil and has been the circumferencial direction mist of oil skewness that the ejection of multiple jets form causes, and improves the ignition temperature field; The improvement of atomizing effect is improving combustion efficiency significantly; Gas (vapour) consumption rate is low, is 0.02 under the declared working condition, and the gas of prior art (vapour) consumption rate between 0.2～0.6, reduces operating cost usually greatly; Flow-rate adjustment is convenient, only needs to establish control valve at nozzle entrance and regulates easily adjust flux of entrance fuel pressure, need not to change parts; Atomizing angle is reasonable; Without coking phenomenon; This pre-membrane type medium atomization nozzle has overcome the defective of prior art from principle and structure, compact conformation, and easy to use, atomizing effect is good, and energy-saving effect is remarkable, has widely practicality.
Description of drawings
Fig. 1 is example one structural representation of the present invention.
Fig. 2 is example two structural representations of the present invention.
Among the figure: the 1-screw; 2-taper bluff body; 3-is with the airhood of perforation; The 4-lip; The 5-cyclone; The 6-nozzle connection; The 7-fuel pipe; 8-center atomizing medium pipe; 9-is not with the airhood of perforation; 10-is with the lip in atomizing medium hole; 11-is with the nozzle connection in outer atomizing medium hole; The outer atomizing medium pipe of 12-; 1.-perforation; 2.-the eddy flow groove; 3.-cyclone atomizing medium hole; 4.-the nozzle connection fuel hole; 5.-lip atomizing medium hole; 6.-the outer atomizing medium of nozzle connection hole.
The specific embodiment
Below in conjunction with accompanying drawing example of the present invention is further described:
Shown in Figure 1, pre-membrane type medium atomization nozzle is comprised of screw 1, taper bluff body 2, airhood 3, lip 4, cyclone 5, nozzle connection 6, fuel pipe 7, center atomizing medium pipe 8 etc. with perforation.Connect with screw 1 between taper bluff body 2 and the cyclone 5, or connect by tapping on taper bluff body 2, taper bluff body 2 ends have conical socket.Pass through thread connection between cyclone 5 and the nozzle connection 6, or cyclone 5 and nozzle connection 6 are processed as an one-piece parts, 2. cyclone 5 has helicla flute in a circumferential direction, has in the circumferential direction of the circle uniform atomizing medium hole 3. near the center.Nozzle connection 6 and fuel pipe 7,8 welding of center atomizing medium pipe, nozzle connection 6 centers have macropore, and 4. the macropore periphery has uniform in the circumferential direction of the circle fuel hole.Pass through thread connection or welding between lip 4 and the nozzle connection 6.With between the airhood 3 of perforation and the lip 4 by thread connection or welding, have the perforation that is uniformly distributed along the circumference on the cylindrical with the airhood 3 of perforation 1..
Its course of work is as follows: fuel oil feeds from fuel pipe 7,4. the fuel hole that is uniformly distributed along the circumference on the process nozzle connection 6 enters cyclone 5, under the effect of fuel pressure, making fuel oil 2. revolve afterwards generate through the eddy flow groove on the cyclone 5 is oil film, and oil film is pasting the inwall rotation of lip 4 and advancing; One road atomizing medium feeds from center atomizing medium pipe 8, the atomizing medium hole that is uniformly distributed along the circumference on the macropore at process nozzle connection 6 centers and the cyclone 5 3., constantly accelerate in the tapering type circular passage between lip 4 and taper bluff body 2, because atomizing medium is turbulent condition, before not going out from nozzle ejection, constantly carrying out the pulsation friction to being attached at the oil film that rotatablely moves on lip 4 inwalls, increased the turbulence level on oil film surface, this part panting action power is gone out the atomizing of rear unstability for oil film from nozzle ejection and is played an important role, near nozzle exit, the fuel oil high speed shear that atomizing medium will revolve the generate film is in advance drawn thin, until spray at a high speed from nozzle; Another road atomizing medium utilizes the kinetic energy of the fuel oil that the tapering type annulus high velocity jet between lip 4 and the taper bluff body 2 goes out-atomizing medium mixture, cause the local depression district, 1. the perforation that the injection ambient air is uniformly distributed along the circumference from airhood 3 cylindricals with perforation enters the airhood 3 of perforation, from at a high speed ejection in the airhood 3 of perforation and the tapering type annulus between the lip 4; In the high speed impact of inside and outside two-way atomizing medium, shear action and under the pulsation rubbing action of nozzle interior atomizing medium to oil film, the very fast unstability of fuel oil is atomized into the mist of oil of tiny particle diameter.
Shown in Figure 2, pre-membrane type medium atomization nozzle is by screw 1, taper bluff body 2, cyclone 5, fuel pipe 7, center atomizing medium pipe 8, not with the airhood 9 of perforation, with the lip 10 in atomizing medium hole, form with the nozzle connection 11 in outer atomizing medium hole, outer atomizing medium pipe 12 etc.Connect with screw 1 between taper bluff body 2 and the cyclone 5, or connect by tapping on taper bluff body 2, taper bluff body 2 ends have conical socket.Pass through thread connection between cyclone 5 and the nozzle connection 11 with outer atomizing medium hole, or cyclone 5 and nozzle connection 11 with outer atomizing medium hole be processed as an one-piece parts, 2. cyclone 5 has helicla flute in a circumferential direction, has in the circumferential direction of the circle uniform atomizing medium hole 3. near the center.Nozzle connection 11 and fuel pipe 7, center atomizing medium pipe 8,12 welding of outer atomizing medium pipe with outer atomizing medium hole, nozzle connection 11 centers with outer atomizing medium hole have macropore, 4. the macropore periphery has uniform in the circumferential direction of the circle fuel hole, has the outer atomizing medium of the nozzle connection hole that is uniformly distributed along the circumference 6. with the nozzle connection 11 in outer atomizing medium hole near peripheral place.With the lip 10 in atomizing medium hole and with between the nozzle connection 11 in outer atomizing medium hole by thread connection or welding, have the lip atomizing medium hole that is uniformly distributed along the circumference 5. with the lip 10 in atomizing medium hole near peripheral place.Not with the airhood 9 of perforation and with passing through thread connection or welding between the lip 10 in atomizing medium hole.
Its course of work is as follows: fuel oil feeds from fuel pipe 7, the fuel hole that is uniformly distributed along the circumference on the nozzle connection 11 of process with outer atomizing medium hole 4., enter cyclone 5, under the effect of fuel pressure, making fuel oil 2. revolve afterwards generate through the eddy flow groove on the cyclone 5 is oil film, and oil film is pasting with the inwall rotation of the lip 10 in atomizing medium hole and advancing; One road atomizing medium feeds from center atomizing medium pipe 8, through with the atomizing medium hole that is uniformly distributed along the circumference on the macropore at nozzle connection 11 centers in outer atomizing medium hole and the cyclone 5 3., in with the lip 10 in atomizing medium hole and the tapering type circular passage between the taper bluff body 2, constantly accelerate, because atomizing medium is turbulent condition, before not going out from nozzle ejection, constantly carrying out the pulsation friction to being attached at the oil film that rotatablely moves on lip 10 inwalls with the atomizing medium hole, increased the turbulence level on oil film surface, this part panting action power is gone out the atomizing of rear unstability for oil film from nozzle ejection and is played an important role, near nozzle exit, the fuel oil high speed shear that atomizing medium will revolve the generate film is in advance drawn thin, until spray at a high speed from nozzle; Another road atomizing medium feeds from outer atomizing medium pipe 12, through the outer atomizing medium of the nozzle connection hole that is uniformly distributed along the circumference with nozzle connection 11 peripheries in outer atomizing medium hole 6., the lip atomizing medium hole that is uniformly distributed along the circumference with lip 10 peripheries in atomizing medium hole 5., enter the airhood 9 of not being with perforation, spray at a high speed with the tapering type annulus between the lip 10 in atomizing medium hole; In the high speed impact of inside and outside two-way atomizing medium, shear action and under the pulsation rubbing action of nozzle interior atomizing medium to oil film, the very fast unstability of fuel oil is atomized into the mist of oil of tiny particle diameter.
Claims (7)
1. pre-membrane type medium atomization nozzle is characterized in that: fuel oil was revolved the generate film in advance before the nozzle ejection, be atomized under the effect of inside and outside two-layer atomizing medium; Atomizing medium is compressed air or steam; The internal layer atomizing medium is forced to feed by pipeline, and outer atomizing medium is to enter nozzle by the surrounding air that the injection mode sucks to participate in atomizing, or forces to feed outer media participation atomizing by pipeline.
2. pre-membrane type medium atomization nozzle according to claim 1 is characterized in that: comprise screw (1), taper bluff body (2), the airhood (3) with perforation, lip (4), cyclone (5), nozzle connection (6), fuel pipe (7), center atomizing medium pipe (8), not with airhood (9), the lip (10) with the atomizing medium hole, the nozzle connection (11) with outer atomizing medium hole, the outer atomizing medium pipe (12) of perforation.
3. according to claim 1,2 described pre-membrane type medium atomization nozzles, it is characterized in that: connect by screw (1) between described taper bluff body (2) and the cyclone (5), or by connecting in the upper tapping of taper bluff body (2); Taper bluff body (2) end has conical socket; Have the eddy flow groove 2. on cyclone (5) circumference, 3. annulus place in the center outside has the cyclone atomizing medium hole that is uniformly distributed along the circumference; Pass through thread connection between cyclone (5) and the nozzle connection (6), or cyclone (5) and nozzle connection (6) are processed as an one-piece parts.
4. according to claim 1,2 described pre-membrane type medium atomization nozzles, it is characterized in that: between described airhood with perforation (3) and the lip (4) by thread connection or welding; Have the perforation that is uniformly distributed along the circumference on airhood (3) excircle with perforation 1., head is tapering type ring exit; Lip (4) outlet is for conical.
5. according to claim 1,2 described pre-membrane type medium atomization nozzles, it is characterized in that: between described lip (4) and the nozzle connection (6) by thread connection or welding; Nozzle connection (6) center has the macropore for atomizing medium circulation, and 4. outer circumference place in center has the nozzle connection fuel hole that is uniformly distributed along the circumference; Nozzle connection (6) and fuel pipe (7), center atomizing medium pipe (8) welding.
6. according to claim 1,2 described pre-membrane type medium atomization nozzles, it is characterized in that: described not with the airhood (9) of perforation and with between the lip (10) in atomizing medium hole by thread connection or welding; Airhood (9) head with perforation is not tapering type ring exit; Have the lip atomizing medium hole that is uniformly distributed along the circumference 5. with the lip (10) in atomizing medium hole near the excircle place, export and be taper shape.
7. according to claim 1,2 described pre-membrane type medium atomization nozzles, it is characterized in that: described lip with the atomizing medium hole (10) and with between the nozzle connection (11) in outer atomizing medium hole by thread connection or welding; Nozzle connection (11) center with outer atomizing medium hole has the macropore that circulates for atomizing medium, 4. outer circumference place, center has the nozzle connection fuel hole that is uniformly distributed along the circumference, and 6. joint fuel hole 4. outer circumference place has the outer atomizing medium of the nozzle connection hole that is uniformly distributed along the circumference; With between the nozzle connection (11) in outer atomizing medium hole and the cyclone (5) by thread connection, maybe will be processed as an one-piece parts with cyclone (5) with the nozzle connection (11) in outer atomizing medium hole; Nozzle connection (11) and fuel pipe (7), center atomizing medium pipe (8), outer atomizing medium pipe (12) welding with outer atomizing medium hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110191404XA CN102878557A (en) | 2011-07-10 | 2011-07-10 | Pre-coating medium atomizing nozzle |
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| CN201110191404XA CN102878557A (en) | 2011-07-10 | 2011-07-10 | Pre-coating medium atomizing nozzle |
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| CN102878557A true CN102878557A (en) | 2013-01-16 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230740A (en) * | 2013-04-25 | 2013-08-07 | 朱跃 | SNCR (selective non-catalytic reduction) swirl atomization spray gun with bluff body device |
| CN103343985A (en) * | 2013-06-21 | 2013-10-09 | 北京航空航天大学 | Double-pre-film pneumatic nebulization low pollution combustor head structure |
| CN105135449A (en) * | 2015-09-30 | 2015-12-09 | 西安航天源动力工程有限公司 | Incineration treatment system for HPF waste liquid |
| CN114688529A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | A pre-film gas-assisted atomizing nozzle with raised ridge structure |
| CN114688528A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Notch cuttype prefilming gas-assisted atomizing nozzle |
| CN114688524A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Wave-shaped pre-film type gas-assisted atomizing nozzle with boss |
| CN114688526A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | A pre-film gas-assisted atomizing nozzle with petal-shaped outlet |
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| CN2065951U (en) * | 1989-10-12 | 1990-11-21 | 四川长风真空射流技术研究所 | Multiple gravitating jet type rotational flow atomized spray injector |
| JP2003214604A (en) * | 2002-01-21 | 2003-07-30 | National Aerospace Laboratory Of Japan | Fluid atomizing nozzle |
| CN101435576A (en) * | 2008-11-28 | 2009-05-20 | 北京大学 | Double-stage injection type pre-film pneumatic atomizing nozzle |
| CN101537397A (en) * | 2009-04-07 | 2009-09-23 | 南京理工大学 | Fuel prefilming air atomizer spray nozzle |
| CN201875710U (en) * | 2010-11-11 | 2011-06-22 | 北京航天动力研究所 | Nozzle for impacting and atomizing coal water slurry from multiple angles |
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2011
- 2011-07-10 CN CN201110191404XA patent/CN102878557A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2065951U (en) * | 1989-10-12 | 1990-11-21 | 四川长风真空射流技术研究所 | Multiple gravitating jet type rotational flow atomized spray injector |
| JP2003214604A (en) * | 2002-01-21 | 2003-07-30 | National Aerospace Laboratory Of Japan | Fluid atomizing nozzle |
| CN101435576A (en) * | 2008-11-28 | 2009-05-20 | 北京大学 | Double-stage injection type pre-film pneumatic atomizing nozzle |
| CN101537397A (en) * | 2009-04-07 | 2009-09-23 | 南京理工大学 | Fuel prefilming air atomizer spray nozzle |
| CN201875710U (en) * | 2010-11-11 | 2011-06-22 | 北京航天动力研究所 | Nozzle for impacting and atomizing coal water slurry from multiple angles |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230740A (en) * | 2013-04-25 | 2013-08-07 | 朱跃 | SNCR (selective non-catalytic reduction) swirl atomization spray gun with bluff body device |
| CN103343985A (en) * | 2013-06-21 | 2013-10-09 | 北京航空航天大学 | Double-pre-film pneumatic nebulization low pollution combustor head structure |
| CN103343985B (en) * | 2013-06-21 | 2015-07-08 | 北京航空航天大学 | A double pre-film pneumatic atomization low-pollution combustor head structure |
| CN105135449A (en) * | 2015-09-30 | 2015-12-09 | 西安航天源动力工程有限公司 | Incineration treatment system for HPF waste liquid |
| CN105135449B (en) * | 2015-09-30 | 2018-08-07 | 西安航天源动力工程有限公司 | A kind of burning processing system for HPF waste liquids |
| CN114688529A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | A pre-film gas-assisted atomizing nozzle with raised ridge structure |
| CN114688528A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Notch cuttype prefilming gas-assisted atomizing nozzle |
| CN114688524A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Wave-shaped pre-film type gas-assisted atomizing nozzle with boss |
| CN114688526A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | A pre-film gas-assisted atomizing nozzle with petal-shaped outlet |
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Application publication date: 20130116 |