CN105351924A - Rotational flow atomizing precombustion type heavy oil burner - Google Patents
Rotational flow atomizing precombustion type heavy oil burner Download PDFInfo
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- CN105351924A CN105351924A CN201510885735.1A CN201510885735A CN105351924A CN 105351924 A CN105351924 A CN 105351924A CN 201510885735 A CN201510885735 A CN 201510885735A CN 105351924 A CN105351924 A CN 105351924A
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- burner block
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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
- F23D11/24—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space
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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
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/38—Nozzles; Cleaning devices therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
Abstract
The invention discloses a rotational flow atomizing precombustion type heavy oil burner. The rotational flow atomizing precombustion type heavy oil burner mainly comprises a reducing spray pipe, a washer, a burner block and a plurality of air supplement pipes. The center axes of the burner block, the washer, the reducing spray pipe and an oil pipe are collinear. The reducing spray pipe is installed outside the oil pipe in a sleeving mode. The outlet end faces of the reducing spray pipe and the oil pipe are coplanar. The washer is arranged between the reducing spray pipe and the burner block. The center axes of the air supplement pipes are parallel and located on the same plane. The plane where the air supplement pipes are located is perpendicular to the vertical cross section passing through the center axis of the burner block. The horizontal cross section passing through the center axis of the burner block obliquely intersects with the plane where the air supplement pipes are located. Compressed air is supplemented through the air supplement pipes, and a gas-oil mixture in the burner block is made to flow spirally. The rotational flow atomizing precombustion type heavy oil burner can be used for energy-saving technical modification of oil-fired industrial furnace combustion systems. The application shows that the rotational flow atomizing precombustion type heavy oil burner is compact in layout, small in investment and free of coking blocking; the combustion efficiency is 99%, the energy saving rate is 5%-10%, and the requirement of the integrated emission standard of air pollutants of GB16297-1996 for the flue gas pollutant emission is met.
Description
Technical field
The present invention relates to a kind of based on the difficult atomized liquid fuel that burns, based on the swirling flow atomizing pre-burning type heavy oil burner of eddy flow secondary-atomizing and the eddy flow theory of combustion in advance, be mainly applicable to fuel oil industrial furnace kiln combustion system and use.
Background technology
Advancing Industrial Green transition and upgrade, promote industrial efficiency, is carry out party's 18 Third Plenary Session spirit, advances the vital measure of Ecological Civilization Construction." prevention and control of air pollution action plan " (No. (2013) 37, promulgated by the State Council) proposes, and newly-built highly energy-consuming Project Unit product energy consumption will reach advanced international level, with reaching one-level Energy Efficiency Standard by equipment." Chinese energy statistical yearbook 2013 " (China Statistics Press, in December, 2013) report, China's industry crude oil quantity of goods produced consumption in 2012 about 4.66 hundred million tons, accounts for more than 99% of whole society's oil consumption, wherein six large key industry oil consumption quantity of goods produced total amount about 4.55 hundred million tons.Fuel oil heating is the main device of fuel consumption.At present, conventional fuel oil thermal efficiency of heating furnace average level only has 82% ~ 89%, and the highly effective energy-conserving environmental-protecting type fuel oil heating occupation rate of market reaching I level efficiency level is not high.Advanced oil burner is conventional fuel oil heating furnace technology upgrading transformation and the essential condition improving efficiency.
Conventional fuel oil heating furnace mainly use a kind of sleeve-type high-voltage burner as shown in Figure 3 (Han Zhaocang. fuel and burning (second edition) [M]. Beijing: metallurgical industry publishing house, 1994:209-211).This burner mainly comprises De Laval noz(zle) 6 and oil pipe 1, its architectural feature is De Laval noz(zle) 6 inner sleeve charge of oil pipe 1, oil pipe 1 central axis and De Laval noz(zle) 6 central axis conllinear, De Laval noz(zle) 6 exit end face, oil pipe 1 exit end face and furnace chamber internal face are at grade.These architectural features cause oil atomization and burning all to complete at De Laval noz(zle) 6 exit end face near zone.After oil flows out burner, under the high velocity air turbulent flow that De Laval noz(zle) 6 sprays, complete oil atomization process at De Laval noz(zle) 6 exit end face near zone.The high velocity air turbulent flow that De Laval noz(zle) 6 sprays is limited, and after atomization, mist of oil particle diameter is comparatively large, and under identical burner hearth cavity steric requirements, mist of oil heat loss due to incomplete combustion is more.In burner hearth, burn with air mixing limit in mist of oil limit, and oily all combustion reactions all concentrate near nozzle exit and complete in a zonule, and this region is high-temperature area, and flame temperature is the highest.There is flame peak temperature in this burner, discharged nitrous oxides concentration is high; Mist of oil this high-temperature area stroke and the time of staying short, incomplete combustion heat loss is large, and unit product fuel consume is high, even can see that black is discharged fume, in flue gas carbon granules and carbon monoxide emission concentration high, current industrial production energy-saving and emission-reduction situation needs can not be met.
The New-type Swirl Flow atomization pre-burning type heavy oil burner that development structure is simple, easy for installation, dependable performance, efficiency of combustion are high and efficiency is high, the Air Pollutant Emission such as flue dust, carbon black, carbon monoxide and nitrogen oxide can be reduced, thus promote China's amphitypy social construction and sustainable development.
Summary of the invention
Only all atomization process are completed by the high velocity air turbulent flow of De Laval noz(zle) ejection in order to overcome conventional sleeve tubular type high pressure burner, all oil atomizations and combustion reaction is completed at De Laval noz(zle) outlet near zone, carbon black in flue gas, the problems such as carbon monoxide and nitrous oxides concentration height, the present invention designs one to be had " convergent jet pipe inner sleeve charge of oil pipe, convergent jet pipe is connected with the burner block in round platform tubular, use many secondary air channels " etc. architectural feature, " oily eddy flow secondary-atomizing, mist of oil eddy flow burns in advance " etc. technical characterstic, " structure is simple, easy for installation, dependable performance, discharged nitrous oxides concentration is low, efficiency of combustion is high and efficiency is high " etc. the swirling flow atomizing pre-burning type heavy oil burner of Multiple techniques advantage.
Swirling flow atomizing pre-burning type heavy oil burner, mainly comprise oil pipe, convergent jet pipe, packing ring, burner block and numerous secondary air channel, burner block sidewall set-point fire hole, burner block, packing ring, convergent jet pipe and oil pipe central axis conllinear, oil pipe is set with convergent jet pipe outward, convergent nozzle exit end face and oil pipe exit end face coplanar, gasket arrangement is between convergent nozzle exit end face and burner block entrance face, burner block entrance face, packing ring is equal with convergent nozzle exit end face three internal diameter, convergent nozzle gas flow passage and burner block intracavity inter-connection, namely oil flow into burner block inner chamber after flowing out oil pipe exit end face, burner block is round platform tubular, burner block exit end face internal diameter is greater than burner block entrance face internal diameter, secondary air channel central axis is parallel to each other and at grade, secondary air channel central axis place plane is with burner block central axis upright cross section is perpendicular excessively, cross burner block central axis horizontal cross-section and secondary air channel central axis place planar tilt to intersect, secondary air channel gas channel and burner block intracavity inter-connection, the compressed air that secondary air channel fills into makes burner block inner chamber gas mixture from burner block entrance face spiral flow to burner block exit end face, finally leave burner block inner chamber and flow into burner hearth cavity.
The fuel oil industrial furnace kiln (containing boiler) of the difficult atomized liquid fuel such as heavy oil combustion, coal tar or biodiesel is newly-built, the place such as energy-conserving and emission-cutting technology upgrading or enlarging, can use the present invention.
Invention good economy performance, energy conservation and environmental protection benefit is remarkable.Application shows: invention structure is simple, and small investment is easy for installation, characteristics of compact layout; Without innage temperature coking and blocking fault, efficiency of combustion is up to more than 99%, relative energy saving ratio 5% ~ 10% and more than, in flue gas, the pollutant emission such as flue dust, carbon monoxide, nitrogen oxide and hydrocarbon reaches discharge standard of air pollutants (GB16297-1996) requirement.
Accompanying drawing explanation
Fig. 1 is the vertical sectional view of swirling flow atomizing pre-burning type heavy oil burner by central axis.
Fig. 2 is the A-A sectional view of swirling flow atomizing pre-burning type heavy oil burner perpendicular to central axis
Fig. 3 is the vertical sectional view of conventional sleeve tubular type high pressure burner by central axis.
In Fig. 1, Fig. 2 and Fig. 3,1 is oil pipe, and 2 is convergent jet pipe, and 3 is packing ring, and 4 is burner block, and 41 is fire hole, and 5 is secondary air channel, and 6 is De Laval noz(zle).
Detailed description of the invention
Below in conjunction with accompanying drawing, invention is further described.
As shown in Figures 1 and 2, swirling flow atomizing pre-burning type heavy oil burner, mainly comprises oil pipe 1, convergent jet pipe 2, packing ring 3, burner block 4 and numerous secondary air channel 5.Secondary air channel 5 gas channel and the oily passage of oil pipe 1 are homalographic circular channel, and oil pipe 1 tubing and secondary air channel 5 tubing are metal material.Burner block 4 sidewall set-point fire hole 41.Burner block 4, packing ring 3, convergent jet pipe 2 and oil pipe 1 four central axis conllinear, oil pipe 1 outer suit convergent jet pipe 2, convergent jet pipe 2 exit end face and oil pipe 1 exit end face coplanar.Packing ring 3 is arranged between convergent jet pipe 2 exit end face and burner block 4 entrance face, convergent jet pipe 2 exit end face internal diameter, packing ring 3 internal diameter are equal with burner block 4 entrance face internal diameter three, burner block 4 inner chamber, packing ring 3 inner chamber are connected with convergent jet pipe 2 gas channel, and namely oil flow into burner block 4 inner chamber after flowing out oil pipe 1 exit end face.Not leaking out in burner block 4 entrance face and packing ring 3 junction, does not leak out in packing ring 3 and convergent jet pipe 2 exit end face junction.Packing ring 3 makes the space between convergent jet pipe 2 exit end face and burner block 4 entrance face not leak out, and stops burner block 4 sidewall high temperature heat transfer to convergent jet pipe 2 sidewall.Burner block 4 is in round platform tubular, and burner block 4 exit end face internal diameter is greater than burner block 4 entrance face internal diameter.Burner block 4 wall is acid refractory, and normal work can bear 1400 DEG C ~ 1600 DEG C high temperature actions.Secondary air channel 5 central axis is parallel to each other and at grade, secondary air channel 5 is put in an arrangement, and adjacent secondary air channel 5 central axis spacing can be equal, also can be unequal.Secondary air channel 5 central axis place plane is mutually vertical with the vertical cross-section by burner block 4 central axis, and secondary air channel 5 central axis place plane and the horizontal cross-section by burner block 4 central axis tilt to intersect.Secondary air channel 5 central axis place plane and can not being parallel to each other by the horizontal cross-section of burner block 4 central axis, can not be mutually vertical.Burner block 4 inner chamber wall and intersected by the vertical section of burner block 4 central axis and obtain by the Up Highway UHW of burner block 4 inner chamber peak and the Down Highway by burner block 4 inner chamber minimum point, upper and lower two buses are positioned at burner block 4 central axis both sides and symmetrical about burner block 4 central axis, secondary air channel 5 internal face is projected between upper and lower two buses on the vertical cross-section by burner block 4 central axis, the outside common tangent that secondary air channel 5 internal face projects on the vertical cross-section by burner block 4 central axis can be Up Highway UHW, also can be Down Highway.The outside common tangent that secondary air channel 5 internal face projects on the vertical cross-section by burner block 4 central axis can be the burner block 4 inner chamber Up Highway UHW by burner block 4 inner chamber peak, also can be the burner block 4 inner chamber Down Highway by burner block 4 inner chamber minimum point.Secondary air channel 5 gas channel and burner block 4 intracavity inter-connection.The compressed air that secondary air channel 5 fills into makes burner block 4 inner chamber gas mixture from burner block 4 entrance face spiral flow to burner block 4 exit end face, finally leaves burner block 4 inner chamber and flows into burner hearth cavity.Burner block 4 exit end face direction is pointed to from burner block 4 entrance face along burner block 4 central axis, oil, air and smoke mixture air-flow can flow out burner block 4 inner chamber by high-speed screw along clockwise direction, also can flow out burner block 4 inner chamber by high-speed screw in the counterclockwise direction.
Oil pipe 1 passes into oil, and convergent jet pipe 2 passes into air, and air can be blasted by air blast or compressor.In convergent jet pipe 2 air flow convergent jet pipe 2 exit end face process, air pressure potential energy gradates as kinetic energy, and when flowing to convergent jet pipe 2 exit end face, air velocity reaches maximum.Oil leaves oil pipe 1 exit end face and namely completes rapidly oil first time atomization at air high velocity turbulent flow perturbation action, and oil becomes mist of oil, forms mist of oil air mixture.Gas mixture flows to burner block 4 inner chamber through burner block 4 entrance face.In burner block 4 inner chamber, gas mixture is subject to the high strength eddy flow perturbation action that wind formation tangentially mended by numerous secondary air channel 5, completes rapidly the atomization of thick elaioleucite second time, and mist of oil particle diameter becomes thinner, and makes mist of oil and the further Homogeneous phase mixing of air.In burner block 4 inner chamber, gas mixture touches the fixing point burning things which may cause a fire disaster sent here from burner block 4 sidewall fire hole 41 and catches fire, and completes rapidly mist of oil combustion process in advance.Control convergent jet pipe 2 air mass flow and secondary air channel 5 and mend air quantity, mist of oil pre-burning is consumed, and amount of fuel is no more than the whole amount of fuel of burner 25%.The high-temperature flue gas that mist of oil pre-burning is formed and Remaining Oil And Gas mixture spray into burner hearth cavity through burner block 4 exit end face high-speed rotational, complete Fuel Remained combustion process in the burner hearth cavity region finally near burner block 4 exports.
Air is from the ejection of convergent jet pipe 2 exit end face high velocity turbulent flow, and meet in convergent jet pipe 2 exit end face position with from oil pipe 1 exit end face effluent oil stream stock, oil meter face is subject to the active forces such as air turbulence disturbance impact friction.Because this active force is greater than oil meter surface tension and viscous force, oil is broken into the elaioleucite of dispersion and forms mist of oil, and mist of oil is formed and oily total surface area is increased, and air-fuel mixture effect is strengthened.Gas mixture flows into burner block 4 inner chamber along burner block 4 central axial direction, and burner block 4 inner chamber is sent into perpendicular to burner block 4 central axial direction in compressed air edge by the secondary air channel 5 be communicated with burner block 4.Compressed air is vertical with gas mixture air-flow to meet, and the compressed air that secondary air channel 5 fills into provides rotational flow driving force to gas mixture in burner block 4, in burner block 4 inner chamber, finally forms high strength rotate gas mixture air-flow.Gas mixture forms high strength and rotates the centrifugal action formed, and mist of oil in gas mixture is broken further, thus obtains more small particle diameter mist of oil, create good conditions for oil burns completely.
Point of safes burning things which may cause a fire disaster stretches into burner block 4 inner chamber from burner block 4 sidewall fire hole 41, and gas mixture is met incendiary source and burning of fighting is occurred.Under centrifugal action, in burner block 4 inner chamber, gas mixture High Rotation Speed is to burner block 4 internal face, and burner block 4 internal face near zone is mist of oil rich region, and the oil firing that this set of regions has suffered lower than 25% reacts and heat release.Oil burns in advance, and burner block 4 internal face temperature raises, and mist of oil cracking reaction is accelerated, oil shortening ignition time.Oil burns in advance, can reduce the oxygen concentration that burner block 4 sprays air-flow, for burner hearth cavity expands combustion flame volume, avoids localized hyperthermia's district's phenomenon, avoids peak flame temperature phenomenon and suppress thermal NO generation etc., creates good conditions.
Swirling flow atomizing pre-burning type heavy oil burner level is installed.Burner block 4 embeds in furnace wall, burner block 4 entrance face and furnace wall outside wall surface coplanar, burner block 4 exit end face and furnace wall internal face coplanar, avoid burner block 4 exit end face to stretch into burner hearth cavity by high temperature scaling loss.Vertically packing ring 3 is arranged between burner block 4 entrance face and convergent jet pipe 2 exit end face, packing ring 3 material is heat-barrier material, stop heat from burner block 4 sidewall heat transfer to convergent jet pipe 2 sidewall, and ensure mist of oil not from the spatial leaks between burner block 4 and convergent jet pipe 2 to burner.Special-purpose supporting frame is set, supports convergent jet pipe 2 and oil pipe 1 Action of Gravity Field.Before igniting runs, need adjustment oil pipe 1, convergent jet pipe 2 and burner block 4 position, make three's central axis conllinear.In normal course of operation, oil pipe 1 oil, negative throat noz(zle) 2 air, burner block 4 gas mixture and secondary air channel 5 compressed air flow velocity are all comparatively large, and can avoid the formation of dirt in pipeline, burner daily clean and maintenance workload is few.
Invention structure innovation, technical characteristic and the technique effect brought are described in detail as follows:
Architectural features such as " convergent jet pipe 2 inner sleeve charge of oil pipes 1, convergent jet pipe 2 is connected with the burner block 4 in round platform tubular, uses many secondary air channels 5 " that invention has.The burner of invention indication, except oil pipe 1, also comprises convergent jet pipe 2, packing ring 3, burner block 4 and secondary air channel 5.Burner block 4 entrance face and convergent jet pipe 2 exit end face are tightly connected by packing ring 3, oil pipe 1 exit end face extends convergent jet pipe 2 exit end face, burner block 4 sidewall set-point fire hole 41, the compressed air that secondary air channel 5 fills into makes gas mixture High Rotation Speed in burner block 4 inner chamber.When air current flow is to convergent jet pipe 2 exit end face, flow expansion speedup process terminates, and air velocity is no more than local velocity of sound.The gas mixture flowing into burner block 4 inner chamber through burner block 4 entrance face slightly reduces along burner block 4 direction speed in burner block 4 inner chamber, does not have pressure potential to be converted into kinetic energy process and occurs.Burner block 4 inner chamber is the atomization of mist of oil second time and part mist of oil combustion zone in advance.Burner block 4 sidewall material is refractory material, need bear high temperature corrosion, and packing ring 3 stops heat from burner block 4 sidewall heat transfer to convergent jet pipe 2 metal sidewall.Conventional sleeve tubular type high pressure burner shown in accompanying drawing 3, except oil pipe 1, mainly comprises De Laval noz(zle) 6.Oil pipe 1 exit end face extends De Laval noz(zle) 6 exit end face, and De Laval noz(zle) 6 divergent segment sidewall does not have fire hole.When air current flow is to De Laval noz(zle) 6 gullet section, flow expansion speedup process does not terminate, so that continue flow expansion speedup process occurs at De Laval noz(zle) 6 divergent segment inner chamber, namely pressure potential continues to be converted into kinetic energy process, exceedes local velocity of sound to air velocity during De Laval noz(zle) 6 exit end face.De Laval noz(zle) 6 divergent segment does not relate to the problem such as oily pre-burning and the atomization of mist of oil second time.De Laval noz(zle) 6 sidewall is metal material, only can be used in cryogenic conditions.
Invention said structure feature directly causes " oily eddy flow secondary-atomizing, mist of oil eddy flow pre-burning " technical characteristic.Convergent jet pipe 2 exit end face position completes oil first time atomization.Oil pipe 1 exit end face and convergent jet pipe 2 exit end face are placed in same perpendicular by the present invention, make full use of the air impact friction active force that convergent jet pipe 2 exit end face is maximum.Reduce gradually with airflow direction perpendicular to convergent jet pipe 2 central axial direction convergent jet pipe 2 intracavity section is long-pending, air-flow static pressure gradates as dynamic pressure, and reach Peak Flow Rate at convergent jet pipe 2 exit end face, now air turbulence degree is maximum, namely convergent jet pipe 2 sprays air and reaches maximum to oily surface reaction forces, makes oil particles diameter reach minimum level.Mist of oil particle diameter is less, and surface area is larger, and it is better to mix with air.On convergent jet pipe 2 exit end face, the high-speed air flow that convergent jet pipe 2 sprays applies shock vibration and friction force to the oil that oil pipe 1 is sent into, and completes oil first time atomization.The compressed air that secondary air channel 5 is sent into applies tangential impact friction centrifugal action to mist of oil, completes the atomization of mist of oil eddy flow second time.The oil second time atomization completed in burner block 4 inner chamber, contributes to improving oil atomization quality further, the mixing of strengthening air-oil-mixture medium.Secondary-atomizing makes oil be atomized into very tiny elaioleucite, increases the surface area that oil molecule contacts with air, enhances oil and the mixability of air, improves oil firing completeness.Secondary air channel 5 tangentially sends into compressed air, makes gas mixture at burner block 4 inner chamber swirling two-phase flows, completes the atomization of mist of oil second time and mist of oil pre-burning process.Burner block 4 inner chamber completes about 25% oil firing reaction, and the preflame reaction namely completed in burner block 4 inner chamber accounts for about 25% of whole combustion reaction share, and the main combustion reaction of residue 75% oil completes at burner hearth cavity.Under eddy flow centrifugal action, gas mixture is concentrated to burner block 4 inner chamber wall near zone, make mist of oil preflame reaction occur in burner block 4 inner wall surface near zone, avoid the conventional sleeve tubular type high pressure burner shown in accompanying drawing 3 in nozzle exit generation coking problem.At burner block 4 inner chamber set-point burning things which may cause a fire disaster, propellant flow is less than 25% of total amount of fuel in advance at burner block 4 inner chamber for mist of oil, and the residue mist of oil more than 75% is injected into burner hearth cavity and carries out burning consumption.Fractional combustion liquid oil, can avoid burner hearth cavity high-temperature region too concentrated.The High Rotation Speed air-flow that burner block 4 sprays, can strengthen furnace gas mixing and heat convection, impel burner hearth cavity uniformity of temperature profile.Oil first time atomization completes instantaneously in convergent jet pipe 2 exit, the atomization of thick elaioleucite second time completes fast at burner block 4 inner chamber, between oil first time atomization and the atomization of thick elaioleucite second time, the time interval is extremely short, space interval is minimum, the atomization of oil second time and mist of oil pre-burning occur in burner block 4 inner chamber simultaneously in addition, realize high efficiency fogging oil and pre-fuel oil.Conventional sleeve tubular type high pressure burner shown in accompanying drawing 3, oil atomization and whole combustion reaction all occur in De Laval noz(zle) 6 exit end face near zone, do not have oily secondary-atomizing and the design of mist of oil pre-burning.The oil atomization occurred in De Laval noz(zle) 6 exit end face near zone moves in convergent jet pipe 2 exit end face near zone and burner block 4 inner chamber and occurs by the heavy oil burner of invention indication, and increase the atomization of mist of oil second time at burner block 4 inner chamber by the strong eddy flow approach of compressed air, further reduction sprays into the oil mist particles particle diameter of burner hearth cavity, strengthening oil atomization process.The integrated fractional combustion principle of heavy oil burner of invention indication, the oil mist combustion part occurred in De Laval noz(zle) 6 exit end face near zone is moved in convergent jet pipe 2 exit end face near zone and burner block 4 inner chamber and occur, realize part mist of oil to burn in advance, reduce oil mist combustion intensity in burner block 4 exit end face near zone, thus reduce burner block 4 exit end face near zone oil mist combustion peak flame temperature, the generation of reduction thermal NO.Part mist of oil, in burner block 4 inner chamber pre-burning, contributes to suppressing NO_x formation, improves complete combustibility, reduce carbon black and carbon monoxide emission concentration in flue gas.
The complex art effect that said structure characteristic sum two technical characteristics bring is: secondary oil atomization and pre-burning complete within the time that an inner chamber, short Distance geometry are short, and apparatus design simplification, device volume are reduced, investment reduces; Oil firing physical and chemical condition improves, oil atomization better effects if, enters furnace oil droplet footpath little, and oil catches fire in advance, and air-fuel mixture is more full and uniform, and gas mixture is at residing time in furnace and lengthened stroke; Burner hearth cavity uniformity of temperature profile, achieves Fast Heating, decreases oxidization burning loss, inhibits NO_x formation; Avoid the coking and blocking problem in oil firing process; Device efficiency gets a promotion, and unit product oil consumption reduces; Oil firing efficiency is high, and in flue gas, the Pollutant emission concentration such as carbon black, carbon monoxide, hydrocarbon reduces.
The fuel oil industrial furnace kiln (containing boiler) of the difficult atomized liquid fuel such as heavy oil combustion, coal tar or biodiesel is newly-built, energy-conserving and emission-cutting technology upgrading and the project such as to enhance production capacities, and all can use the present invention.
Invention application shows: invention small investment, easy for installation, characteristics of compact layout; The environmental pollution problem such as can solve industrial furnace liquid fuel combustion carbon black, carbon monoxide, discharged nitrous oxides exceed standard, makes flue gas pollutant discharge lower than " emission standard of air pollutants for boilers " (GB13271-2014), " discharge standard of air pollutants " (GB16297-1996) and " industrial furnace atmosphere pollutants emission standards " (GB9078-1996) emission level; The oily coking problem existed can be solved in industrial furnace liquid fuel combustion; Device efficiency improves 5% ~ 10%, and oil firing efficiency reaches more than 99%.
Claims (2)
1. swirling flow atomizing pre-burning type heavy oil burner, mainly comprise oil pipe, convergent jet pipe, packing ring, burner block and numerous secondary air channel, it is characterized in that: burner block sidewall set-point fire hole, burner block, packing ring, convergent jet pipe and oil pipe central axis conllinear, oil pipe is set with convergent jet pipe outward, convergent nozzle exit end face and oil pipe exit end face coplanar, gasket arrangement is between convergent nozzle exit end face and burner block entrance face, burner block entrance face, packing ring is equal with convergent nozzle exit end face three internal diameter, convergent nozzle gas flow passage and burner block intracavity inter-connection, namely oil flow into burner block inner chamber after flowing out oil pipe exit end face, burner block is round platform tubular, burner block exit end face internal diameter is greater than burner block entrance face internal diameter, secondary air channel central axis is parallel to each other and at grade, secondary air channel central axis place plane is mutually vertical with the vertical cross-section by burner block central axis, intersected by the horizontal cross-section of burner block central axis and secondary air channel central axis place planar tilt, secondary air channel gas channel and burner block intracavity inter-connection, the compressed air that secondary air channel fills into makes burner block inner chamber gas mixture from burner block entrance face spiral flow to burner block exit end face, finally leave burner block inner chamber and flow into burner hearth cavity.
2. swirling flow atomizing pre-burning type heavy oil burner as claimed in claim 1, it is characterized in that: the outside common tangent that described secondary air channel internal face projects on the vertical cross-section by described burner block central axis, can be the burner block inner chamber Up Highway UHW by described burner block inner chamber peak, also can be the burner block inner chamber Down Highway by described burner block inner chamber minimum point.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105605570A (en) * | 2016-03-14 | 2016-05-25 | 中南大学 | Rotational flow and return flow combined type oil atomization burner |
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| CN102466227A (en) * | 2010-11-11 | 2012-05-23 | 北京航天动力研究所 | Multi-unit multi-stage bubble impact atomization coal water slurry nozzle |
| CN102128453A (en) * | 2011-01-28 | 2011-07-20 | 岳阳科德科技有限责任公司 | Pre-combustion burner |
| CN104654295A (en) * | 2014-01-28 | 2015-05-27 | 广西西江锅炉制造有限公司 | Heavy oil burner |
| CN205137443U (en) * | 2015-12-06 | 2016-04-06 | 中南大学 | Whirl atomizing pre -burning type heavy oil burner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605570A (en) * | 2016-03-14 | 2016-05-25 | 中南大学 | Rotational flow and return flow combined type oil atomization burner |
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