CN109307264A - Microburner based on liquid fuel - Google Patents
Microburner based on liquid fuel Download PDFInfo
- Publication number
- CN109307264A CN109307264A CN201811204418.9A CN201811204418A CN109307264A CN 109307264 A CN109307264 A CN 109307264A CN 201811204418 A CN201811204418 A CN 201811204418A CN 109307264 A CN109307264 A CN 109307264A
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- CN
- China
- Prior art keywords
- wall
- microburner
- upper housing
- lower case
- fuel
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
- F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet
- F23D11/102—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber
- F23D11/103—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber with means creating a swirl inside the mixing chamber
-
- 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
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/44—Preheating devices; Vaporising devices
- F23D11/441—Vaporising devices incorporated with burners
- F23D11/443—Vaporising devices incorporated with burners heated by the main burner flame
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- 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)
Abstract
The present invention relates to a kind of microburners based on liquid fuel, are related to technical field of engines.The present invention 1) there is no any restrictions to the type of fuel oil, can using various liquid fuels even fuel gas, 2) to fuel oil formed preheat, ensured fuel oil can high-efficiency evaporating, burning；3) firing delay is reduced, improves ignition success rate, and can realize increasing for fuel oil and combustion gas residence time with lower small size, to reduce geometric dimension needed for igniter；4) it can effectively absorb the thermic load formed in combustion to inner wall and improve the service life of burner to reduce surface temperature.
Description
Technical field
The present invention relates to technical field of engines, and in particular to a kind of microburner based on liquid fuel.
Background technique
Microburner based on liquid fuel refers to burner using liquid fuel as fuel, using air as oxidation
Agent, while the air mass flow unit of burner is in the Miniature combustion device of " Grams Per Second " magnitude (generally less than 5g/s).This kind burning
Device has huge application potential in Micro Electro Mechanical System.The heat loss rate of micro-burner is with surface area/volume (S/V) and outside
Wall surface temperature is directly proportional, and than under conventional scale, big 2~3 orders of magnitude, the increase of heat loss lead to flame to the S/V of micro-burner
Unstable, flame-out, thermal efficiency reduction etc..Compared with gaseous fuel, liquid fuel has energy density height, is easy to transport and store
The advantages that.Current microburner is mainly to hold based on incendive fuel gas, the microburner difficulty of liquid fuel
Greatly, thus at present lack the related data of application.
A kind of microburner of alcohol fuel as shown in Figure 1, this kind of structure need to lead to fuel high-voltage electricity and carry out work
Make, structure is complicated, and needs additional lasting electric energy as input condition.
Nozzle connects high-voltage power cathode, and grid earthing pole, fuel charges by contact, in the Coulomb force of charged liquid
And under the action of surface tension, it is broken into droplet, and under the draw of electric field force, is formed between nozzle and grid
It is spraying, after being collected by grid, burnt using external heat source heating sparking mode.
The major defect of this structure are as follows:
1) structure is complicated, needs that metal mesh is arranged in burner internal；
2) system effectiveness is low, functional weak, and liquid fuel can be atomized by needing to continue electric energy input；
3) fuel type is single, is difficult to charged fuel to some and can not burn；
4) system complex, high production cost.
Summary of the invention
(1) technical problems to be solved
The technical problem to be solved by the present invention is how to design a kind of low cost, structure is simple, can burn a variety of liquid
Fuel, service life are long, high-efficient Miniature combustion device.
(2) technical solution
In order to solve the above-mentioned technical problems, the present invention provides a kind of microburner based on liquid fuel, including it is upper
Shell 1 and lower case；
The type face of the upper housing 1 is semiellipse, semicircle, the composite structure of semiellipse and rectangle, semicircle and rectangle
One of composite structure；The lower case is connected by the way of welding by upper end wall 2, outer housing 3, lower end wall 5, inner wall 6
Composition, and the ring cavity as air collecting chamber is surrounded, it is provided with the inclined hole that 4-8 are 30 °~60 ° with wall surface normal direction inclination angle on inner wall 6 and makees
For air inlet, it is arranged circumferentially；
It is connected between the upper housing 1 and the upper end wall 2 of lower case, inner wall 6 is cylindrical surface, and the lower port of upper housing 1
It is matched with the upper end mouth-shaped of inner wall 10, area；Upper housing 1 is equipped with semiconductor discharge plug 10；It is set on the outer housing 3 of lower case
There is air inlet 4, is attached by the way of welding between air inlet 4 and the outer housing 3 of lower case；On outer housing 3 with air inlet
4 opposite positions of mouth are additionally provided with oil inlet 7, and evaporation tube 8, institute are equipped in the burner cavity surrounded by upper housing 1 and inner wall 6
Stating evaporation tube 8 is L-type, and horizontal ends pass through inner wall 6 out of burner cavity and are connected to the ring cavity, and face oil inlet 7, vertically
Rectify to 1 top center of upper housing；Oil inlet 7 is also connected with a fueller, and the fueller and oil inlet 7 use spiral shell
The mode of line connection is attached, and is sealed by taper-face contact；Fueller be both ends be all cone seal head or
The hollow pipeline of the hollow structure on spherical sealed head, fueller cental axial position is flowed therethrough for fuel oil, and hollow
Metal pipe material is installed in pipeline.
Preferably, it is connected between the upper housing 1 and the upper end wall 2 of lower case using screw 9.
Preferably, the screw number is 4-6, is arranged circumferentially,
Preferably, semiconductor discharge plug 10 is connect by the way of being threadedly coupled with upper housing 1.
Preferably, the oil inlet 7 is welded on outer housing 3.
Preferably, the evaporation tube 8 passes through the central axis of the port of inner wall 6 and the central axis coaxial of oil inlet 7.
Preferably, the diameter of the hollow pipeline of the fueller cental axial position is 0.2-0.6mm.
Preferably, metal pipe material of the installation internal diameter less than 0.3mm in the hollow pipeline.
(3) beneficial effect
In the present invention, 1) evaporation uses L-type evaporation tube, and fuel-oil atmozation uses the hollow pipeline in fueller, and
Metal pipe material is installed, therefore, this programme does not have any restrictions to the type of fuel oil, can be using various liquid fuels very in pipeline
To fuel gas.Using 2) reverse heat-exchange structure: fuel oil enters burner by evaporation tube, and the import of evaporation tube is located at burner
Rear portion, in the operating condition, combustion gas is flowed through from evaporation outer surface, therefore is formed and preheated to fuel oil, has ensured that fuel oil can be high
Effect evaporation, burning.3) inner wall wall surface effusion wall designs, and forms the vortex structures of circumferential swirl flow combustion, which includes tight
It is affixed on the vortex structures of inner wall wall surface and internal flow volume is inhaled due to the vortex structures and form circumferential vortex system flowing knot
Structure.Firing delay is reduced, improves ignition success rate, and can realize fuel oil and combustion gas residence time with lower small size
Growth, to reduce geometric dimension needed for igniter.Using 4) ring cavity is heat-insulated and insulation construction；The ring surrounded by four walls
Certain circumferential air flowing is formd in shape air collecting chamber, can effectively absorb and the heat that inner wall is formed is born in combustion
Lotus improves the service life of burner to reduce surface temperature.
Detailed description of the invention
Fig. 1 is the microburner working principle diagram of alcohol fuel of the invention；
Fig. 2 is burner cross-sectional view of the invention；
Fig. 3 is fueller cross-sectional view in the present invention.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to of the invention
Specific embodiment is described in further detail.
As shown in Fig. 2, the present invention provides a kind of microburner based on liquid fuel, including upper housing 1 and lower casing
Body.
The type face of the upper housing 1 is semiellipse, semicircle, the composite structure of semiellipse and rectangle, semicircle and rectangle
One of composite structure；The lower case is connected by the way of welding by upper end wall 2, outer housing 3, lower end wall 5, inner wall 6
Composition, and the ring cavity as air collecting chamber is surrounded, it is provided with the inclined hole that 4-8 are 30 °~60 ° with wall surface normal direction inclination angle on inner wall 6 and makees
For air inlet, it is arranged circumferentially；
It is connected between the upper housing 1 and the upper end wall 2 of lower case using screw 9, screw number is 4-6, circumferentially
Even arrangement, inner wall 6 is cylindrical surface, and the lower port of upper housing 1 is matched with the upper end mouth-shaped of inner wall 10, area；Upper housing 1
It is equipped with semiconductor discharge plug 10；Semiconductor discharge plug 10 connects the shell of lower case by the way of being threadedly coupled with upper housing 1
Body 3 is equipped with air inlet 4, is attached by the way of welding between air inlet 4 and the outer housing 3 of lower case；On outer housing 3
7 oil inlet 7 of oil inlet is additionally provided with the position of 4 relative spacing 180 degree of air inlet to be welded on outer housing 3, by upper housing 1 with
Evaporation tube 8 is equipped in the burner cavity that inner wall 6 surrounds, the evaporation tube 8 is L-type, and horizontal ends galianconism one end is out of burner
It is intracavitary pass through inner wall 6 be connected to the ring cavity, and the central axis of the port across inner wall 6 of 7 evaporation tube 8 of face oil inlet and
The central axis coaxial of oil inlet 7,1 top center of vertical end face upper housing.Oil inlet 7 is also connected with a fueller,
The fueller is attached by the way of being threadedly coupled with oil inlet 7, and is sealed by taper-face contact.Such as Fig. 3
Shown, fueller is the hollow structure that both ends are all cone seal head or spherical sealed head, fueller center axle position
The diameter for the hollow pipeline set is 0.2-0.6mm, is flowed therethrough for fuel oil, and installation internal diameter is less than 0.3mm's in pipeline
Metal pipe material.
The workflow and principle of burner of the invention are as follows:
Air is entered in lower case by air inlet 4 to be made of upper end wall 2, outer housing 3, lower end wall 5, inner wall 6 as collection
The ring cavity of air cavity then enters the burner cavity of upper housing 1 and lower case composition by the air inlet opened up on inner wall 6, and
Certain cyclone structure has been formed slopely due to air inlet angle.Fuel oil is protected by the flow path of diameter 0.2-0.6mm in fueller
Hinder the continuity of the flowing of fuel oil, and ensure the jet velocity of fuel oil, to ensure what fuel oil was sprayed from fueller exit
The radius or fuel particles diameter of fuel oil column are smaller, so that fuel oil be made to be directly entered the import of evaporation tube 8, and enter evaporation tube
8 air is adequately blended, and with air, is flowed along evaporation tube 8, into inside burner cavity.Due to atomization
Effect, causes fuel oil to be injected to burner internal in the form of molecule.In turn, fuel particles and combustion chamber air carry out
Sufficiently blending, due to the two phase flow distributed architecture with certain oil-gas distribution.In turn, semiconductor discharge plug 10 passes through a spark
Form convert electrical energy into thermal energy, to light the petroleum distribution field, form violent combustion chemistry reaction, production high temperature combustion
Gas blowout goes out burner.
Combustion chamber generate high-temperature fuel gas before spraying burner after evaporation tube 8, with the air in evaporation tube 8 into
The strong heat exchange of row, improves the temperature of air and the temperature of fuel oil in evaporation tube 8, to ensure that fuel oil goes out in evaporation tube 8 out
Gaseous state adequately can be converted by liquid before mouthful, ensure the completeness of burning.
Air-flow enters the ring cavity by air inlet 4, subsequently into the inclined hole opened up on inner wall 6, and then enters in burner
Intracavitary portion, the process both allowed ring cavity to play the role of gas collection, had ensured that each gas inlet hole amount is identical, meanwhile, and can cool down
Inner wall absorbs the outside heat transfer of inner wall, reduces the loss of entire bumer heat external environment.
The design of lower case outlet can carry out Interface design according to object to be heated or working medium injection object, allow
It transfers the outlet of different radii.
It is compared to the prior art, burner long service life of the invention, can burn a variety of liquid fuel kerosene, second
Alcohol, diesel oil, heavy oil etc.), it is greatly broadened the usable range of fuel, efficient, stable can burn, stable high temperature can be generated
Combustion gas, working range are wide.Test proves, can adapt to the working environment of up to tens atmospheric pressure, its stream of the combustion gas of generation
Range is measured in 0-10g/s, temperature range is within 800-1800K.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of microburner based on liquid fuel, which is characterized in that including upper housing (1) and lower case；
The type face of the upper housing (1) is semiellipse, semicircle, the composite structure of semiellipse and rectangle, the group of semicircle and rectangle
Close one of structure；The lower case is by upper end wall (2), outer housing (3), lower end wall (5), inner wall (6) using the side welded
Formula connection composition, and the ring cavity as air collecting chamber is surrounded, it is 30 °~60 ° that 4-8 are provided on inner wall (6) with wall surface normal direction inclination angle
Inclined hole as air inlet, be arranged circumferentially；
It is connected between the upper housing (1) and the upper end wall (2) of lower case, inner wall (6) is cylindrical surface, and under upper housing (1)
Port is matched with the upper end mouth-shaped of inner wall (10), area；Upper housing (1) is equipped with semiconductor discharge plug 10；Outside lower case
Shell (3) is equipped with air inlet (4), is connected by the way of welding between air inlet (4) and the outer housing (3) of lower case
It connects；The position opposite with air inlet (4) is additionally provided with oil inlet (7) on outer housing (3), surrounds by upper housing (1) and inner wall (6)
Burner cavity in be equipped with evaporation tube (8), the evaporation tube (8) be L-type, horizontal ends out of burner cavity pass through inner wall
(6) it is connected to the ring cavity, and face oil inlet (7), 1 top center of vertical end face upper housing；Oil inlet (7) also connects
Connect a fueller, the fueller is attached by the way of being threadedly coupled with oil inlet 7, and by taper-face contact into
Row sealing；Fueller is the hollow structure that both ends are all cone seal head or spherical sealed head, fueller central axis
The hollow pipeline of position is flowed therethrough for fuel oil, and metal pipe material is equipped in hollow pipeline.
2. microburner as described in claim 1, which is characterized in that the upper end wall (2) of the upper housing (1) and lower case
Between using screw 9 connect.
3. microburner as claimed in claim 2, which is characterized in that the screw number is 4-6, circumferential uniform cloth
It sets.
4. microburner as described in claim 1, which is characterized in that semiconductor discharge plug 10 and upper housing (1) use screw thread
The mode of connection connects.
5. microburner as described in claim 1, which is characterized in that the oil inlet (7) is welded on outer housing (3).
6. microburner as described in claim 1, which is characterized in that the evaporation tube (8) passes through the port of inner wall (6)
The central axis coaxial of central axis and oil inlet (7).
7. microburner as described in claim 1, which is characterized in that the hollow pipeline of the fueller cental axial position
Diameter be 0.2-0.6mm.
8. microburner as claimed in claim 7, which is characterized in that installation internal diameter is less than 0.3mm in the hollow pipeline
Metal pipe material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811204418.9A CN109307264B (en) | 2018-10-16 | 2018-10-16 | Micro combustor based on liquid fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811204418.9A CN109307264B (en) | 2018-10-16 | 2018-10-16 | Micro combustor based on liquid fuel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109307264A true CN109307264A (en) | 2019-02-05 |
| CN109307264B CN109307264B (en) | 2019-12-13 |
Family
ID=65224562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811204418.9A Active CN109307264B (en) | 2018-10-16 | 2018-10-16 | Micro combustor based on liquid fuel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109307264B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10205714A (en) * | 1997-01-22 | 1998-08-04 | Toshiba Home Technol Corp | Vaporization type combustion appliance |
| CN202303371U (en) * | 2011-08-31 | 2012-07-04 | 李永安 | Liquid fuel gasified combustion device |
| US20130157206A1 (en) * | 2011-12-16 | 2013-06-20 | National Cheng Kung University | A combustor applied in thermophotovoltaic system |
| CN105674260A (en) * | 2016-03-17 | 2016-06-15 | 华南理工大学 | Miniature liquid burner adopting double-preheating structure and burning method of liquid burner |
-
2018
- 2018-10-16 CN CN201811204418.9A patent/CN109307264B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10205714A (en) * | 1997-01-22 | 1998-08-04 | Toshiba Home Technol Corp | Vaporization type combustion appliance |
| CN202303371U (en) * | 2011-08-31 | 2012-07-04 | 李永安 | Liquid fuel gasified combustion device |
| US20130157206A1 (en) * | 2011-12-16 | 2013-06-20 | National Cheng Kung University | A combustor applied in thermophotovoltaic system |
| CN105674260A (en) * | 2016-03-17 | 2016-06-15 | 华南理工大学 | Miniature liquid burner adopting double-preheating structure and burning method of liquid burner |
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| Publication number | Publication date |
|---|---|
| CN109307264B (en) | 2019-12-13 |
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