CN201652342U - Porous media combustion apparatus for liquid fuel - Google Patents

Porous media combustion apparatus for liquid fuel Download PDF

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Publication number
CN201652342U
CN201652342U CN2010201952729U CN201020195272U CN201652342U CN 201652342 U CN201652342 U CN 201652342U CN 2010201952729 U CN2010201952729 U CN 2010201952729U CN 201020195272 U CN201020195272 U CN 201020195272U CN 201652342 U CN201652342 U CN 201652342U
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China
Prior art keywords
porous media
liquid fuel
porous
distributor
aperture
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Expired - Lifetime
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CN2010201952729U
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Inventor
王关晴
罗丹
黄雪峰
丁宁
黄华
刘彦
徐江荣
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Hangzhou Dianzi University
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Hangzhou Dianzi University
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Abstract

The utility model relates to a porous media combustion apparatus for liquid fuel. The traditional combustion apparatus has low combustion efficiency. The porous media combustion apparatus comprises a mixed fuel gas uniform distributer and a liquid fuel injector, wherein a first premixed distributer is arranged below the liquid fuel injector; a primary air combustion heat accumulator outer wall preheating channel inlet is arranged in the side direction of the upper end of the first premixed distributer; the lower end of the first premixed distributer is provided with a porous media evaporation preheater; the lower end of the porous media evaporation preheater is provided with a second premixed distributer; a secondary air inlet is arranged in the side direction of the middle section of the second premixed distributer; the lower end of the second premixed distributer is provided with a porous media combustor; and the lower end of the porous media combustor is provided with a porous media heat accumulator. The utility model has the advantages of energy saving, lower pollutant emission and wider change range of combustion load.

Description

A kind of liquid fuel porous medium combusting device
Technical field
The utility model belongs to the multi-hole medium combustion technical field, relates to a kind of liquid fuel porous medium combusting device.
Background technology
For a long time, in the burner of industry and daily use, the mode of utilizing of various finished product wet goods liquid fuels mainly is to be used by the diffusion combustion mode that atomizer sprays, atomized drop mixes the diffusion combustion process of carrying out with combustion air after constantly evaporating in the high-speed jet process, have tangible combustion flame peak face, peak temperature is higher, thermograde is obvious, and pollutant emission concentration such as CO and NOx are higher, and the soot particulates concentration discharge is bigger; Simultaneously, for guarantee that atomized drop can fully mix with combustion air in the high-speed jet process, the combustion chamber must keep enough big space, makes the burner apparatus volume be difficult to miniaturization; In addition, the atomizing diffusion combustion mode of traditional free space obviously is subjected to the restriction of fuel nozzle performance on fuel flow rate, causes burner combustion load variations scope less, reduces the smooth combustion scope of burner.
Except that each traditional finished product wet goods liquid fuel, in industrial production, particularly at oil, chemical industry, also there are volatile secondary liquid fuels such as a large amount of alcohol radicals, ether, phenyl in the fields such as pharmacy, and the development of biomass pyrolysis liquefaction system oil tech in recent years, a large amount of bio-oils can appear from now on.These liquid organic fuels are owing to the production technology difference, and it is different to originate, and the waste liquid component is widely different, and are very complicated, mostly are difficult to biodegradation, have serious toxic action to biological with the mankind.Therefore, efficiently use this class I liquid I fuel requirement burner and have wideer burner combustion load variations scope.
For realizing the utilization of liquid fuel high-efficiency cleaning, people are placed on big quantity research basically and improve on the atomizer performance in the past, seldom research are placed in the improvement of novel combustion technology.
The multi-hole medium combustion technology is a kind of novel combustion technology of rising in the seventies in 20th century, it is the technological revolution in the generally acknowledged combustion field in international burning circle, improving combustion intensity and stability, increase the burning load ratio, widen the poor combustion limit, improve efficiency of combustion, reduce the capable tangible advantages of aspect tool such as pollutant emission, and on reduction equipment volume, implementation structure compactness, have powerful advantages.
In recent years, for improving the restriction of liquid fuel jet atomization combustion system, researchers are applied to liquid fuel combustion with the multi-hole medium combustion technology, found that not only combustion flame is more stable, Temperature Distribution is more even, efficiency of combustion improves, and pollutants such as NOx and C0 are lower, simultaneously, eliminating cigarette ash formation, widen burning load and change ratio, reduce equipment volume, realize that the device miniaturization aspect has same advantage.For the utilization of liquid fuel high-efficiency cleaning provides a kind of brand-new approach.
Adopting multi-hole medium combustion technology combusting liquid fuel, how to realize that it is of paramount importance deciding factor that liquid fuel is rapidly and efficiently vaporized, is that can liquid fuel continue in porous media, stablize, the key point of efficient burning.For improving liquid fuel carburation by evaporation speed, German scholar is installed a cool flame evaporimeter in burner; The Japan scholar has adopted the ultrasonic wave radiation to improve the liquid fuel evaporation rate in burner apparatus, but the ultrasonic wave radiation needs certain extra energy consumption, has reduced the overall performance of burner.The Japan scholars also abandon atomizer, at burner placed upstream metal grill and porous ceramics dish, the distribution evaporimeter acts as a fuel, on its basis, the Thailand scholar places radiation transmitter in the downstream, combustion zone, with the air that tangential swirling flow enters, change the three-dimensional swirling flow into and enter, but still in free space, disposal of pollutants is higher relatively in burning.American scholar adopts electrical heating preheated burning air, guarantees that fuel evaporates fully, but consumes additional energy.
It is domestic that research in multi-hole medium combustion is in the starting state to liquid fuel.At present, just Primary Study has been carried out in the burning in porous media to liquid fuel, has verified the feasibility that the atomizing oil spout is burnt in porous media, but is realizing that liquid fuel continues, still need improve in stable, the high-efficiency evaporating vaporization.
Summary of the invention
The utility model main purpose provides the more miniaturization of a kind of structure, and is energy-conservation lower with pollutant emission, the liquid fuel porous medium combusting device that the load variations scope is wideer.
Device in the utility model comprises the air mixture uniform distributor, the liquid fuel syringe, below the liquid fuel within syringe, be provided with first and be pre-mixed distributor, first is pre-mixed the distributor upper lateral is provided with the import of primary air burning storage heater outer wall preheating channel, first is pre-mixed the distributor lower end is provided with the porous evaporator medium preheater, the lower end of porous evaporator medium preheater is provided with second and is pre-mixed distributor, second is pre-mixed the import that distributor stage casing side direction is provided with auxiliary air, second is pre-mixed the distributor lower end is provided with porous media combustor, and the porous media combustor lower end is provided with the porous media storage heater.
Described liquid fuel syringe is atomizer or following current feeder.
The import arrangement that described first preheated air and second that is pre-mixed the distributor upper lateral is pre-mixed upper lateral auxiliary air in the distributor adopts symmetry or circumferentially evenly arranges; The shaft section incident direction of import becomes 0 °~90 ° angles with fluid flow direction.
Described porous evaporator medium preheater is made up of the even liquid distributor of upstream and the evaporation preheating chamber in downstream.
A kind of in the ceramic honey comb plate of foam metal, foamed ceramic panel or high density holes that described even liquid distributor is metal otter board, high density holes.
Described evaporation preheating chamber is the foam metal that the foamed ceramics that gradually changes of aperture, the uniform foamed ceramics of voidage or aperture, space or aperture, the uniform foam metal of voidage or aperture, space gradually change;
The aperture of described aperture gradual change foamed ceramics or foam metal is 0.1mm~20mm, and the spontaneous evaporation preheating chamber begins, and aperture or voidage should dullly increase;
The voidage of described aperture gradual change foamed ceramics or foam metal is 0.1~0.99.
Porous media in the described porous media combustor is the foamed ceramics that the foamed ceramics that gradually changes of aperture, the uniform foamed ceramics of voidage or aperture, space or layering change.
Porous media in the described porous media combustor is the porous media of particle packing type or the porous media or the foamed ceramics type porous media of fiber accumulations type.
The porous media of described porous media storage heater is honeycomb type ceramic heat storage body or granular pattern accumulation of heat bead or foamed ceramics.
Utilize method that the device in the utility model burns at first air and combustion gas after the air mixture uniform distributor mixes, through first be pre-mixed distributor, porous evaporator medium preheater and the second premix mixing distributor after, in porous media combustor, burn, the heat that burning produces is by the radiation and the heat conduction upstream passing of porous media, preheating porous evaporator medium preheater, the high-temperature flue gas that produces directly enters porous media storage heater release heat, discharges after becoming low-temperature flue gas;
After preheating fully, close pre-mixing gas combustion, the start liquid fuel injector, open the primary air of burning storage heater outer wall preheating channel and the control valve of auxiliary air simultaneously, the primary air of liquid fuel and preheating is pre-mixed distributor first to be mixed, and after in the porous evaporator medium preheater, carrying out carburation by evaporation, mix in second premixer with auxiliary air, enter porous media combustor and put burning, the high-temperature flue gas that produces directly enters release heat in the multi-hole medium combustion storage heater, after becoming low-temperature flue gas, discharge by the exhanst gas outlet control valve.
Main design principle of the present utility model: the utlity model has (gradation type) porous media preheater body and porous media combustor body, and directly link to each other with the high-efficiency thermal storage chamber, adopt the air stage feeding combustion system, utilize on the thinking basis of the peripheral preheating channel preheating of burning regenerator primary air, in conjunction with the hot reflux that self produces in the multi-hole medium combustion, guarantee that liquid fuel evaporates continuously and healthily, boil-off gas is with after secondary wind mixes rapidly, enter the burning of porous media combustor main body, the high-temperature flue gas that produces reclaims fume afterheat by the high-efficiency thermal storage chamber limit, becomes low-temperature flue gas and discharges.
The utility model has the advantages that directly porous evaporator medium vaporization, premix, burning, accumulation of heat are integrated in one; Utilize burning regenerator peripheral channel preheating primary air,, guarantee that liquid fuel evaporates continuously and healthily in conjunction with the hot reflux that self produces in the multi-hole medium combustion; Realize overheavy firing and low pollutant emission by air stage feeding and multi-hole medium combustion technology, adopt the high-efficiency porous media heat storage technology to realize that the fume afterheat limit reclaims; Adopt pre-mixing gas combustion combustion system preheating multi-hole medium combustion system, not only help liquid fuel steam burning and start fast, and can utilize the combustion wave propagation characteristic of pre-mixing gas combustion in porous media that the carbon and the soot particulates that are accumulated in the runner in the middle of the porous media are regularly removed.Make the system architecture miniaturization, energy-conservation lower with pollutant emission, the combustion load excursion is bigger.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
Elaborate below in conjunction with 1 pair of the utility model of accompanying drawing.
As shown in Figure 1, the utility model device comprises air mixture uniform distributor 1, liquid fuel syringe 2, below the liquid fuel within syringe 2, be provided with first and be pre-mixed distributor 3, first is pre-mixed distributor 3 upper lateral is provided with 4 imports of primary air burning storage heater outer wall preheating channel, preheating channel 4 is communicated with the primary air import 10 of burner bottom, first is pre-mixed distributor 3 lower ends is provided with porous evaporator medium preheater 5, the lower end of porous evaporator medium preheater 5 is provided with second and is pre-mixed distributor 6, second is pre-mixed distributor 6 stage casing side direction is provided with auxiliary air import 7, second is pre-mixed distributor 6 lower ends is provided with porous media combustor 8, porous media combustor 8 lower ends are provided with porous media storage heater 9, and porous media storage heater 9 lower ends also determine whether to be provided with heat exchanger as required.The concrete structure size of porous evaporator medium preheater 5, porous media combustor 8, porous media storage heater 9 etc. can be carried out corresponding Calculation of Heat Transfer according to system's design load, determines.
The liquid fuel syringe is atomizer (big molecule liquid fuel) or following current feeder (volatile liquid fuel such as alcohol radical, ether, phenyl).
First is pre-mixed preheated air of distributor upper lateral and the second import arrangement that is pre-mixed upper lateral auxiliary air in the distributor can adopt symmetry or circumferentially evenly arrange; The shaft section incident direction of import becomes 0 °~90 ° angles with fluid flow direction.Incident direction can be for tangential, vertical or fall between in the cross section of import.
The porous evaporator medium preheater is made up of the even liquid distributor of upstream and the evaporation preheating chamber in downstream, and evenly liquid distributor is a kind of in the ceramic honey comb plate of foam metal, foamed ceramic panel or high density holes of metal otter board, high density holes.
The evaporation preheating chamber is the foam metal that the foamed ceramics that gradually changes of aperture, the uniform foamed ceramics of voidage or aperture, space or aperture, the uniform foam metal of voidage or aperture, space gradually change;
The aperture of aperture gradual change foamed ceramics or foam metal is 0.1mm~20mm, and the spontaneous evaporation preheating chamber begins, and aperture or voidage should dullly increase; The voidage of aperture gradual change foamed ceramics or foam metal is 0.1~0.99.
Porous media in the porous media combustor is the foamed ceramics that the foamed ceramics that gradually changes of aperture, the uniform foamed ceramics of voidage or aperture, space or layering change.Porous media in the porous media combustor is the porous media of particle packing type or the porous media of fiber accumulations type.
The porous media of porous media storage heater is honeycomb type ceramic heat storage body or ceramic heat-storing bead or foamed ceramics.
Utilize method that the device in the utility model burns at first air and combustion gas after the air mixture uniform distributor mixes, be pre-mixed distributor through first, the porous evaporator medium preheater, and second behind the premix mixing distributor, in porous medium combusting device, burn, the heat that burning produces is by the radiation and the heat conduction upstream passing of porous media, preheating porous evaporator medium preheater, the high-temperature flue gas that produces directly enters porous media storage heater release heat, discharge after becoming low-temperature flue gas
After preheating fully, close pre-mixing gas combustion, the start liquid fuel injector, open the primary air of burning storage heater outer wall preheating channel and the control valve of auxiliary air simultaneously, the primary air of liquid fuel and preheating is pre-mixed distributor first to be mixed, and after in the porous evaporator medium preheater, carrying out carburation by evaporation, mix in second premixer with auxiliary air, enter the porous medium combusting device burning, the high-temperature flue gas that produces directly enters release heat in the multi-hole medium combustion storage heater, after becoming low-temperature flue gas, discharge by the exhanst gas outlet control valve.
Adopt the pre-heat effect of pre-mixing gas combustion burning like this, utilize a continual preheating high temperature air, in conjunction with self backflow heat in the multi-hole medium combustion process, continuously liquid fuel is carried out the rapid evaporation vaporization, and burn rapid the mixing with air, thereby realized that liquid fuel evaporates the method for premixed combustion process in porous media structure, simultaneously, can also utilize the propagation characteristic of pre-mixing gas combustion combustion wave in porous media regularly carbon in the porous media in the runner and soot particulates to be removed.
The utility model integrates porous evaporator medium, premix, burning accumulation of heat, superiority with (gradation type) porous medium combusting device, by combining with the air stage feeding technology, efficiency of combustion height not only, pollutant emission is low, and makes its adaptive ability strong, load regulation range is wide, and directly combine with heat storage technology, realized that the limit of fume afterheat reclaims, make littler, the more compact structure of combustion chamber volume.This combustion method and technology can be widely used in the efficient burning of liquid fuels of tradition such as gasoline, diesel oil, and especially be adapted in the industrial production, particularly at oil, chemical industry, the efficient burning of volatile secondary liquid fuels such as the alcohol radical in the fields such as pharmacy, ether, phenyl.

Claims (9)

1. liquid fuel porous medium combusting device, it is characterized in that: comprise air mixture uniform distributor and liquid fuel syringe, below the liquid fuel within syringe, be provided with first and be pre-mixed distributor, first is pre-mixed the distributor upper lateral is provided with the import of primary air burning storage heater outer wall preheating channel, first is pre-mixed the distributor lower end is provided with the porous evaporator medium preheater, the lower end of porous evaporator medium preheater is provided with second and is pre-mixed distributor, second is pre-mixed the import that distributor stage casing side direction is provided with auxiliary air, second is pre-mixed the distributor lower end is provided with porous media combustor, and the porous media combustor lower end is provided with the porous media storage heater.
2. a kind of liquid fuel porous medium combusting device according to claim 1 is characterized in that: described liquid fuel syringe is atomizer or following current feeder.
3. a kind of liquid fuel porous medium combusting device according to claim 1 is characterized in that: the import arrangement that described first preheated air and second that is pre-mixed the distributor upper lateral is pre-mixed upper lateral auxiliary air in the distributor adopts symmetry or circumferentially evenly arranges; The shaft section incident direction of import becomes less than 90 ° with fluid flow direction.
4. a kind of liquid fuel porous medium combusting device according to claim 1 is characterized in that: described porous evaporator medium preheater is made up of the even liquid distributor of upstream and the evaporation preheating chamber in downstream.
5. a kind of liquid fuel porous medium combusting device according to claim 4 is characterized in that: a kind of in the ceramic honey comb plate of foam metal, foamed ceramic panel or high density holes that described even liquid distributor is metal otter board, high density holes.
6. a kind of liquid fuel porous medium combusting device according to claim 4 is characterized in that: described evaporation preheating chamber is the foam metal that the foamed ceramics that gradually changes of aperture, the uniform foamed ceramics of voidage or aperture, space or aperture, the uniform foam metal of voidage or aperture, space gradually change;
The aperture of described aperture gradual change foamed ceramics or foam metal is 0.1mm~20mm, and the spontaneous evaporation preheating chamber begins, and aperture or voidage should dullly increase;
The voidage of described aperture gradual change foamed ceramics or foam metal is 0.1~0.99.
7. a kind of liquid fuel porous medium combusting device according to claim 1 is characterized in that: the porous media in the described porous media combustor is the foamed ceramics that the foamed ceramics that gradually changes of aperture, the uniform foamed ceramics of voidage or aperture, space or layering change.
8. a kind of liquid fuel porous medium combusting device according to claim 1 is characterized in that: the porous media in the described porous media combustor is porous media or the porous media of fiber accumulations type or the porous media of foam type of particle packing type.
9. a kind of liquid fuel porous medium combusting device according to claim 1 is characterized in that: the porous media of described porous media storage heater is honeycomb type ceramic heat storage body or granular pattern accumulation of heat bead or foamed ceramics.
CN2010201952729U 2010-05-18 2010-05-18 Porous media combustion apparatus for liquid fuel Expired - Lifetime CN201652342U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101832554A (en) * 2010-05-18 2010-09-15 杭州电子科技大学 Liquid fuel porous medium combusting device and combusting method thereof
CN102563641A (en) * 2011-12-30 2012-07-11 西安交通大学 Heat storage type combustor powered by liquid fuel
CN104807031A (en) * 2015-03-09 2015-07-29 上海万寅安全环保科技有限公司 Hydrogen combustion-supporting device and method
CN106524238A (en) * 2016-10-26 2017-03-22 青岛理工大学 Energy-saving civil gas cookstove
CN107702146A (en) * 2017-10-12 2018-02-16 四川达宇特种车辆制造厂 For the porous evaporator medium pipe in micro gas turbine engine combustion chamber
CN106247333B (en) * 2016-08-31 2018-06-12 中煤科工集团重庆研究院有限公司 A kind of porous media combustor of variable power
CN110594730A (en) * 2019-09-30 2019-12-20 西安科技大学 Thermoelectric conversion device based on liquid fuel combustion

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101832554A (en) * 2010-05-18 2010-09-15 杭州电子科技大学 Liquid fuel porous medium combusting device and combusting method thereof
CN102563641A (en) * 2011-12-30 2012-07-11 西安交通大学 Heat storage type combustor powered by liquid fuel
CN102563641B (en) * 2011-12-30 2014-11-05 西安交通大学 Heat storage type combustor powered by liquid fuel
CN104807031A (en) * 2015-03-09 2015-07-29 上海万寅安全环保科技有限公司 Hydrogen combustion-supporting device and method
CN106247333B (en) * 2016-08-31 2018-06-12 中煤科工集团重庆研究院有限公司 A kind of porous media combustor of variable power
CN106524238A (en) * 2016-10-26 2017-03-22 青岛理工大学 Energy-saving civil gas cookstove
CN107702146A (en) * 2017-10-12 2018-02-16 四川达宇特种车辆制造厂 For the porous evaporator medium pipe in micro gas turbine engine combustion chamber
CN107702146B (en) * 2017-10-12 2019-10-18 四川航天中天动力装备有限责任公司 For the indoor porous evaporator medium pipe of micro gas turbine engine burning
CN110594730A (en) * 2019-09-30 2019-12-20 西安科技大学 Thermoelectric conversion device based on liquid fuel combustion
CN110594730B (en) * 2019-09-30 2021-06-25 西安科技大学 Thermoelectric conversion device based on liquid fuel combustion

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