CN105135428A - Nozzle-free porous medium combustion device and fuel oil combustion method - Google Patents
Nozzle-free porous medium combustion device and fuel oil combustion method Download PDFInfo
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- CN105135428A CN105135428A CN201510427396.2A CN201510427396A CN105135428A CN 105135428 A CN105135428 A CN 105135428A CN 201510427396 A CN201510427396 A CN 201510427396A CN 105135428 A CN105135428 A CN 105135428A
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Abstract
The invention provides a nozzle-free porous medium combustion device and a fuel oil combustion method. The combustion device comprises an oil tank, a combustion part and a driving pump. The combustion part comprises a pre-evaporation area and a combustion area. The pre-evaporation area is filled with first porous media and provided with a fuel oil inlet and a primary air inlet. The combustion area is communicated with the pre-evaporation area and filled with second porous media. The end, close to the pre-evaporation area, of the combustion area is provided with an igniter and a fuel gas inlet. The end, far away from the pre-evaporation area, of the combustion area is provided with a first outlet. The fuel oil combustion method comprises the following steps that pre-mixed fuel gas is injected into the combustion area through the fuel gas inlet and ignited through the igniter, and heat generated during combustion is used for preheating the first porous media and the second porous media; and the driving pump is started, primary air is injected through the primary air inlet, fuel oil enters the pre-evaporation area through the fuel oil inlet and is vaporized, and the vaporized fuel oil enters the combustion area to be ignited. The nozzle-free porous medium combustion device can achieve efficient, full and clean combustion of thickened oil and other low-quality fuel oil.
Description
Technical field
The present invention relates to combustion field, especially a kind of can realize the low-quality fuel efficients such as viscous crude, clean burning without nozzle-type porous medium combusting device and oil inflame method.
Background technology
Oil, as a kind of important irreproducibility strategic resource, has special meaning to the development of the national economy.In the face of China's sternness oil is in short supply situation, while stepping up to carry out find exploration, improve the output in exploitation later stage oil field and the high efficiency realizing low-quality fuel oil (as viscous crude) utilizes significant.
In recent years, combustion in situ is subject to increasing attention as a kind of thermal recovery technology of heavy crude producing.Combustion in situ utilizes the Heat of Formation of minimum a part of crude oil combustion (of oil) insitu in oil reservoir as thermal source, utilizes multiple driving comprehensive function to improve the thermal recovery processes of recovery ratio.This technology has the advantages that recovery ratio is high, thermal effect is high, applied widely.The viscous crude of oilbearing stratum is distributed in be had in the sandstone rock of a large amount of hole, and this structure can regard the porous media structure of particle random distribution as.Therefore, combustion in situ relates to high viscosity viscous crude and lights a fire in blowhole type porous media and the challenge of smooth combustion, the oil displacement efficiency of combustion in situ and oil property, multiple factors such as air draught amount, firing temperature are relevant, simultaneously due to particularity, the execute-in-place difficulty by geologic structure, add the restriction of the factors such as oil reservoir waterflooding, combustion in situ technique is not yet generally admitted at present and is applied, and relevant experimental study is also little.
And for the viscous crude exploited out, due to reasons such as viscosity are large, impurity is many, there is the defects such as efficiency of combustion is low, pollutant discharge amount is high, seriously hindering it applies, and also result in the significant wastage of the energy.
Summary of the invention
The object of this invention is to provide a kind of without nozzle-type porous medium combusting device and oil inflame method, it can realize efficient, the clean burning of the low-quality fuel oils such as viscous crude.
For achieving the above object, the present invention proposes a kind of without nozzle-type porous medium combusting device, describedly comprises without nozzle-type porous medium combusting device: for the fuel tank of accommodating fuel oil; Combustion section, comprising: prevapourising district, is filled with the first porous media in described prevapourising district, and described prevapourising district is provided with fuel filler and First air entrance; Combustion zone, is communicated with described prevapourising district, is filled with the second porous media in described combustion zone, and described combustion zone is provided with igniter and fuel gas inlet near the one end in described prevapourising district, and described combustion zone is provided with the first outlet away from the one end in described prevapourising district; For the driving pump driving described fuel oil to enter described fuel filler.
As above without nozzle-type porous medium combusting device, wherein, described prevapourising district is also provided with the second outlet, and the external heat exchanger tube of described second outlet, described heat exchanger tube extends in described fuel tank.
As above without nozzle-type porous medium combusting device, wherein, described combustion zone is also provided with Secondary Air entrance, and described Secondary Air entrance is adjacent with described fuel gas inlet.
As above without nozzle-type porous medium combusting device, wherein, the annular preheating channel that described Secondary Air entrance and is looped around outside described combustion zone is communicated with.
As above without nozzle-type porous medium combusting device, wherein, be also provided with explosion-proof layer in described combustion zone, described explosion-proof layer is between described second porous media and described first export.
As above without nozzle-type porous medium combusting device, wherein, described First air entrance is multiple, and each described First air inlet ambient is all surrounded with multiple described fuel filler.
As above without nozzle-type porous medium combusting device, wherein, described first porous media is foamed ceramics.
As above without nozzle-type porous medium combusting device, wherein, described second porous media is ceramic accumulation type porous media, and the porosity of described second porous media increases to the one end near described first outlet gradually from the one end near described prevapourising district.
As above without nozzle-type porous medium combusting device, wherein, described fuel oil is viscous crude.
As above without nozzle-type porous medium combusting device, wherein, described combustion section also comprises housing, described housing has inner chamber, the left field of described inner chamber is filled described first porous media and is formed described prevapourising district, and the right side area of described inner chamber is filled described second porous media and formed described combustion zone.
As above without nozzle-type porous medium combusting device, wherein, described first porous media makes described fuel gasification by preheating and accumulation of heat, and the heat that described fuel oil produces at described second burning porous medium internal combustion passes through the first porous media described in the further preheating of hot reflux.
The present invention also proposes a kind of oil inflame method, and wherein, described oil inflame method adopts as above without nozzle-type porous medium combusting device, and described oil inflame method comprises the following steps:
Step S1: pre-mixing combustion: the premixed gas be made up of combustion gas and air is injected described combustion zone by described fuel gas inlet, adopt described igniter to light described premixed gas, the heat that described premixed gas burning produces is to described first porous media and described second porous media preheating;
Step S2: then start described driving pump, in described prevapourising district, inject First air by described First air entrance simultaneously, described fuel oil enters described prevapourising district by described fuel filler, and vaporizes in described prevapourising district, and the described fuel oil after vaporization enters in described combustion zone to be lighted;
Step S3: after the oil inflame in described combustion zone is stable, close described fuel gas inlet, the gas that described oil inflame produces discharges external heat supply through described first outlet.
Oil inflame method as above, wherein, described prevapourising district is also provided with the second outlet, the external heat exchanger tube of described second outlet, and described heat exchanger tube extends in described fuel tank; In described step S1, before described premixed gas is injected described combustion zone, first close described first outlet, open described second outlet; The heat that described premixed gas burning produces is to while described first porous media and described second porous media preheating, and the flue gas that burning produces enters in described fuel tank, to described fuel-firing preheating via described heat exchanger tube; After the fuel-firing preheating in described fuel tank is abundant, then open described first outlet, close described second outlet.
Oil inflame method as above, wherein, described combustion zone is also provided with Secondary Air entrance; In described step S1, while adopting described igniter to light described premixed gas, opening described Secondary Air entrance, by regulating the flow entering the Secondary Air of described Secondary Air entrance, making the combustion flame of described premixed gas keep stable; In described step S3, after the oil inflame in described combustion zone is stable, continue to make described Secondary Air entrance be held open state.
Feature without nozzle-type porous medium combusting device and oil inflame method of the present invention and advantage are:
1, of the present invention without nozzle-type porous medium combusting device and oil inflame method, according to porous media preheating, accumulation of heat feature, the pre-mixing combustion in porous media is utilized to carry out preheating to prevapourising district and viscous crude, and guide viscous crude initiation combustion by pre-mixing combustion, under the hot reflux effect of porous media, ensure viscous crude fast vaporizing or evaporation, and then sustained combustion is carried out in the second porous media of combustion zone, solve the problem that the low-quality fuel oils such as viscous crude are nonflammable in free space, efficient, abundant, clean burning can be realized.
2, of the present invention without nozzle-type porous medium combusting device and oil inflame method, can First air entrance, the Secondary Air entrance of switch by arranging, realize air stage feeding, and the Flow-rate adjustment of First air, Secondary Air can be realized, realize air appropriate, supply in good time, thus further ensure the Thorough combustion of fuel oil.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1 is the schematic diagram without nozzle-type porous medium combusting device of the present invention;
Fig. 2 is the sectional view along A-A line in Fig. 1.
Main element label declaration:
1 fuel tank 11 fuel oil 12 heat exchanger tube
2 combustion section 21 prevapourising rooms
211 fuel filler 212 First air entrance 213 second outlets
22 combustion chambers
221 igniter 222 fuel gas inlet 223 Secondary Air entrances
The annular preheating channel of 224 first outlet 225 explosion-proof layer 226
23 housings
3 driving pump 31 oil pipes
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and the specific embodiment of the present invention is described.
As shown in Figure 1, the invention provides a kind of without nozzle-type porous medium combusting device, can be used for the low-quality fuel oil that burns, comprise for the fuel tank 1 of accommodating fuel oil 11, combustion section 2 and driving pump 3, fuel oil 11 is wherein such as the high viscosity fuel liquids such as viscous crude.
Combustion section 2 comprises for making the prevapourising room 21 (or prevapourising district) of fuel gasification or atomization and for making the combustion chamber 22 (or combustion zone) of oil inflame, the first porous media is filled with in prevapourising room 21, for making fuel gasification, porous media is good shape-selective catalyst, be conducive to the catalytic cracking of viscous crude, can promote that viscous crude evaporates, the expansion lean combustion limit, prevapourising room 21 is provided with the fuel filler 211 entering prevapourising indoor for fuel oil, and for First air (or air) enter prevapourising indoor can the First air entrance 212 of switch, such as be connected by oil pipe 31 between fuel filler 211 with fuel tank 1, combustion chamber 22 is communicated with prevapourising room 21, the second porous media is filled with in combustion chamber 22, combustion chamber 22 is provided with the igniter 221 for pre-mixing combustion near one end of prevapourising room 21, and the fuel gas inlet 222 adjacent with igniter 221, the region that combustion chamber 22 is being connected with prevapourising room 21 is in other words provided with igniter, igniter is such as pulse igniter, the premixed gas be made up of combustion gas and air is injected by fuel gas inlet 222, and adopt igniter 221 to be lighted by premixed gas, pre-mixing combustion can be realized, thus just can to the first porous media and the second porous media preheating, ensure the vaporization effect that viscous crude is good, combustion chamber 22 is provided with the first outlet 224 away from one end of prevapourising room 21, for the high-temperature gas after burning is discharged external heat supply.Driving pump 3 is connected between fuel tank 1 and combustion section 2, and for driving fuel oil to enter in prevapourising room 21 through fuel filler 211, driving pump 3 is preferably peristaltic pump, is pressed in prevapourising room 21 by fuel oil by oil pipe 31, and the flow of fuel oil can be controlled by throttle.
Of the present invention without nozzle-type porous medium combusting device, according to porous media, there is preheating, the feature of accumulation of heat, by pre-mixing combustion to the first porous media and the second porous media preheating, viscous crude is vaporized in the first porous media, the burning of viscous crude after vaporization in the second porous media can produce hot reflux effect again, further guarantee viscous crude fast vaporizing, thus adopt porous media to make viscous crude realize fast vaporizing and smooth combustion in without nozzle situation, improve viscous crude efficiency of combustion, reduce pollutant emission, solve the problem that viscous crude is nonflammable in free space.Meanwhile, also analogue experiment installation is provided, for the practical application of situ combustion technology provides technological guidance for exploring combustion in situ.The present invention adopts the porous media furnace preheat burner without nozzle fuel system, and its structure relative compact, adjustment, than large, are particularly suitable for minitype motivation or thermal device.
In addition, the existence of porous media can not only shorten firing delay, is conducive to IGNITION CONTROL, and can reduce the voltage rise speed in the stage of catching fire, and reduces the pollutions such as noise.
In addition, porous media inner structure in the present invention is complicated, have very large internal surface area, be conducive to fuel oil to be uniformly distributed in space, under the effective heat accumulation of porous media and heat transfer effect, fuel in combustion section and Temperature Distribution are tending towards even, form a kind of approximate homogeneous combustion, the discharge of the pollutants such as NOx, CO all greatly reduces, and has excellent combustibility.
In a feasible technical scheme, the first porous media is such as foamed ceramics, preferred macrovoid foamed ceramics, the foamed ceramics that such as porosity is greater than 80%.Second porous media is such as ceramic accumulation type porous media, preferably ceramic bead accumulation type porous media, and the porosity of the second porous media increases to the one end near the first outlet gradually from the one end near prevapourising room, and such as porosity increases to 60% from 40%.Because foamed ceramics porous media and ceramic bead accumulation type porous media have larger specific area and regular pore passage structure, larger molecule or group can be processed, be particularly useful for vaporization and the Thorough combustion of the high viscosity fuel liquids such as viscous crude.Simultaneously, due to high thermal conductivity and the high radiant rate of solid material in this porous media, porous media is made to have excellent overall thermal transport property and sizable thermal capacity, liquid distribution is on a large amount of internal pore surface, the very thin oil film of easy formation realizes evaporating fast and completely, and volatility far exceedes wire netting etc.By arranging multi-level porous media structure, also filtration combustion can be realized.But in the present invention, the concrete structure of the first porous media and the second porous media and type are not limited to this, can carry out selecting or being adjusted according to realizing combustion case.
Again as shown in Figure 1, specifically, combustion section 2 comprises the housing 23 of a hollow, the shape of this housing is such as cylinder or cuboid, this housing is the metal shell that can bear burning load, the left field (flow direction of fuel oil in combustion section is for from left to right) of the inner chamber of this housing is filled with the first porous media and forms prevapourising room 21, the right side area of the inner chamber of this housing is filled with the second porous media and forms combustion chamber 22, prevapourising room 21 directly contacts with the second porous media with the first porous media of junction, combustion chamber 22 (or being called that face contacts), namely prevapourising room 21 and combustion chamber 22 completely through, therebetween without any barrier, so that fuel oil and heat circulate, and be convenient to heat that fuel oil produces at the second burning porous medium internal combustion by hot reflux further preheating first porous media, and make igniter and fuel gas inlet have preheating second concurrently by pre-mixing combustion, second porous media and the function of lighting fuel oil, compact conformation, fuel filler 211, First air entrance 212, fuel gas inlet 222, first outlet 224 is such as all opened on the wall of housing, all runs through the wall of housing 23 in other words, and igniter 221 stretches in combustion chamber 22 through the wall of housing.
In a preferred embodiment, prevapourising room 21 be also provided with can switch second outlet 213, second outlet 213 external heat exchanger tubes 12, heat exchanger tube 12 extends in fuel tank, and stretch out outside fuel tank after fuel tank 1 inner bending extends, thus the flue gas produced during pre-mixing combustion can enter in the heat exchanger tube 12 that stretches in fuel tank through the second outlet 213, preheating is carried out to viscous crude, to reduce its viscosity, not only be convenient to be driven in prevapourising room, its vaporization rate can also be accelerated further, and improve heat utilization rate.
In another preferred embodiment, combustion chamber 22 is also provided with can the Secondary Air entrance 223 of switch, Secondary Air entrance 223 is adjacent with fuel gas inlet 222, in combustion chamber 22, Secondary Air (or air) is passed into for during pre-mixing combustion, by regulating secondary air flow, the combustion flame of premixed gas is made to keep stable, and make combustion flame be stabilized in region, prevapourising room 21, in addition, viscous crude after vaporization enters after combustion chamber 22 lighted, except passing into except First air by First air entrance, also pass into Secondary Air by Secondary Air entrance, realize viscous crude stablizing in the second porous media, sustained combustion.Secondary Air entrance 223 is such as also opened on the wall of housing, is in communication with the outside combustion chamber 22.
Burner of the present invention, by arranging First air entrance and Secondary Air entrance, is convenient to adopt air stage feeding mode as required, ensures the Thorough combustion of viscous crude further, reduces pollutant emission.In addition, after the combustion system (comprising pre-mixing combustion, air stage feeding etc.) that the EVAP in porous media is inner special with it combines, fluid combustion stability, efficiency of combustion and Flammability limits will greatly be improved.
In a feasible technical scheme, the annular preheating channel 226 that Secondary Air entrance 223 and is looped around (or peripheral) outside combustion chamber 22 is communicated with, Secondary Air enters in combustion chamber via annular preheating channel, Secondary Air entrance successively, the length of this annular preheating channel 226 such as equals the length of combustion chamber 22, thus make viscous crude when combustion chamber 22 combustion, simultaneously to the Secondary Air preheating flowing through annular preheating channel, efficiency of combustion and heat utilization rate can be improved.
In addition, as shown in Figure 2, First air entrance 212 is multiple, and is all surrounded with multiple fuel filler 211 around each First air entrance 212, to ensure that air is in liberal supply, dispersed, ensures viscous crude Thorough combustion further.Wherein First air entrance is evenly distributed on the end of housing, and be such as distributed on baffle plate closed for shell end entrance, concrete distributing position also can be arranged according to Actual combustion situation.
In the present embodiment, explosion-proof layer 225 is also provided with in combustion chamber 22, explosion-proof layer 225 exports between 224 at the second porous media and first, explosion-proof layer 225 is positioned at the exit of combustion chamber 22 in other words, specifically, the first porous media, the second porous media and explosion-proof layer is filled from left to right successively in the inner chamber of housing 23.This explosion-proof layer is such as foamed ceramics explosion-proof layer, for preventing flame from occurring deflagration phenomenon, ensures safety.
When adopting burner of the present invention burning viscous crude, concrete operation step is as follows:
1. close the first outlet 224, open the second outlet 213, premixed gas is injected via fuel gas inlet 222 and is filled with in the combustion chamber 22 of the second porous media, light a fire through igniter 221, make combustion chamber 22 occur combustion flame;
2. open Secondary Air entrance 223, regulate Secondary Air size, make combustion flame be stabilized in region, prevapourising room 21;
3. when prevapourising room 21 temperature reaches more than viscous crude vapourizing temperature, open the first outlet 224, close the second outlet 213, open First air entrance 212, the flow of adjustment First air, Secondary Air makes flame stablize in combustion chamber 22, viscous crude is pressed into prevapourising room 21 by peristaltic pump, and viscous crude enters combustion chamber 22 at prevapourising room 21 rapid vaporization and is lighted, and realizes burning;
4., after combustion flame is stabilized in the second porous media district, closes fuel gas inlet 222, realize the smooth combustion of viscous crude, combustion process can by adjusting viscous crude injection rate and First air, secondary air flow regulates.
When adopting burner combustion gas of the present invention, concrete operation step is as follows:
1. close the second outlet 213, open the first outlet 224, the premixed gas be made up of combustion gas and air is injected combustion chamber 22, and igniter 221 is lighted a fire, and makes combustion chamber 22 occur combustion flame;
2. combustion flame is from prevapourising room 21 (or first porous media district), mobile to combustion chamber 22 (or second porous media district) gradually, realize the filtration combustion of pre-mixed gas in multi-level porous media structure, combustion heat release can be used as the external heat supply of thermal source.
The present invention also provides a kind of oil inflame method, and this oil inflame method adopts as above without nozzle-type porous medium combusting device, and burn to low-quality fuel oils such as such as viscous crude, this oil inflame method comprises the following steps:
Step S1: pre-mixing combustion: the premixed gas be made up of combustion gas and air is injected combustion chamber 22 by fuel gas inlet 222, igniter 221 is adopted to light premixed gas, the heat that premixed gas burning produces is to the first porous media and the second porous media preheating, the first porous media through preheating and accumulation of heat can make viscous crude vaporize fast, fully, and the second porous media through preheating and accumulation of heat can make that viscous crude is stable, Thorough combustion;
Step S2: then start driving pump 3, in prevapourising room 21, inject First air by First air entrance 212 simultaneously, fuel oil enters prevapourising room 21 by fuel filler 222, and vaporize in prevapourising room 21, fuel oil after vaporization enters in combustion chamber 22 and is lighted, the heat that viscous crude produces at the second burning porous medium internal combustion enters the first porous media by hot reflux effect again, further preheating first porous media, ensures that viscous crude is vaporized fast, fully;
Step S3: after the oil inflame in combustion chamber 22 is stable, close fuel gas inlet 222, the gas that oil inflame produces discharges external heat supply through the first outlet 224.
Further, also comprise following operation in step sl: before premixed gas being injected combustion chamber 22, first close the first outlet 224, open the second outlet 213; The heat that premixed gas burning produces is to while the first porous media and the second porous media preheating, and the flue gas that burning produces enters in fuel tank 1 via heat exchanger tube 12, to fuel oil 11 preheating; After fuel oil 11 preheating in fuel tank 1 fully, then open the first outlet 224, close the second outlet 213, and then proceed to step S2.
Further, also comprising following operation in step sl: while adopting igniter to light premixed gas, open Secondary Air entrance 223, by regulating the flow entering the Secondary Air of Secondary Air entrance 223, making the combustion flame of premixed gas keep stable.Also comprise following operation in step s3: after the oil inflame in combustion chamber 22 is stable, continue to make Secondary Air entrance 223 be held open state, to pass into Secondary Air by Secondary Air entrance, for viscous crude burns well-off air.
In the present invention, without specific vapourizing unit in burner, when not having fuel injector, viscous crude is by peristaltic pump press-in prevapourising room, after vaporizing completely in the first porous media surface and inside, flammable mixed vapour realizes smooth combustion in the second porous media; The first porous media after preheating can ensure the vaporization effect that viscous crude is good, and then ensure that burner has the features such as sufficient combustion, pollutant discharge amount be low.The present invention is not only suitable for the burning of viscous crude, flammable industrial wastes etc. nonflammable under also can be used for normality, has very good effect to the efficient burning realizing low-quality fuel oil.
The foregoing is only the schematic detailed description of the invention of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.And it should be noted that, each part of the present invention is not limited in above-mentioned overall applicability, the each technical characteristic described in description of the present invention can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, the present invention covers other relevant with this case inventive point in the nature of things and combines and embody rule.
Claims (14)
1. without a nozzle-type porous medium combusting device, it is characterized in that, describedly to comprise without nozzle-type porous medium combusting device:
For the fuel tank of accommodating fuel oil;
Combustion section, comprising:
Prevapourising district, is filled with the first porous media in described prevapourising district, and described prevapourising district is provided with fuel filler and First air entrance;
Combustion zone, is communicated with described prevapourising district, is filled with the second porous media in described combustion zone, and described combustion zone is provided with igniter and fuel gas inlet near the one end in described prevapourising district, and described combustion zone is provided with the first outlet away from the one end in described prevapourising district;
For the driving pump driving described fuel oil to enter described fuel filler.
2. as claimed in claim 1 without nozzle-type porous medium combusting device, it is characterized in that, described prevapourising district is also provided with the second outlet, and the external heat exchanger tube of described second outlet, described heat exchanger tube extends in described fuel tank.
3. as claimed in claim 1 without nozzle-type porous medium combusting device, it is characterized in that, described combustion zone is also provided with Secondary Air entrance, and described Secondary Air entrance is adjacent with described fuel gas inlet.
4. as claimed in claim 3 without nozzle-type porous medium combusting device, it is characterized in that, the annular preheating channel that described Secondary Air entrance and is looped around outside described combustion zone is communicated with.
5. as claimed in claim 1 without nozzle-type porous medium combusting device, it is characterized in that, be also provided with explosion-proof layer in described combustion zone, described explosion-proof layer is between described second porous media and described first export.
6. as claimed in claim 1 without nozzle-type porous medium combusting device, it is characterized in that, described First air entrance is multiple, and each described First air inlet ambient is all surrounded with multiple described fuel filler.
7. as claimed in claim 1 without nozzle-type porous medium combusting device, it is characterized in that, described first porous media is foamed ceramics.
8. as claimed in claim 1 without nozzle-type porous medium combusting device, it is characterized in that, described second porous media is ceramic accumulation type porous media, and the porosity of described second porous media increases to the one end near described first outlet gradually from the one end near described prevapourising district.
9. as claimed in claim 1 without nozzle-type porous medium combusting device, it is characterized in that, described fuel oil is viscous crude.
10. as claimed in claim 1 without nozzle-type porous medium combusting device, it is characterized in that, described combustion section also comprises housing, described housing has inner chamber, the left field of described inner chamber is filled described first porous media and is formed described prevapourising district, and the right side area of described inner chamber is filled described second porous media and formed described combustion zone.
11. is as claimed in claim 1 without nozzle-type porous medium combusting device, it is characterized in that, described first porous media makes described fuel gasification by preheating and accumulation of heat, and the heat that described fuel oil produces at described second burning porous medium internal combustion passes through the first porous media described in the further preheating of hot reflux.
12. 1 kinds of oil inflame methods, is characterized in that, described oil inflame method adopts as claimed in claim 1 without nozzle-type porous medium combusting device, and described oil inflame method comprises the following steps:
Step S1: pre-mixing combustion: the premixed gas be made up of combustion gas and air is injected described combustion zone by described fuel gas inlet, adopt described igniter to light described premixed gas, the heat that described premixed gas burning produces is to described first porous media and described second porous media preheating;
Step S2: then start described driving pump, in described prevapourising district, inject First air by described First air entrance simultaneously, described fuel oil enters described prevapourising district by described fuel filler, and vaporizes in described prevapourising district, and the described fuel oil after vaporization enters in described combustion zone to be lighted;
Step S3: after the oil inflame in described combustion zone is stable, close described fuel gas inlet, the gas that described oil inflame produces discharges external heat supply through described first outlet.
13. oil inflame methods as claimed in claim 12, it is characterized in that, described prevapourising district is also provided with the second outlet, the external heat exchanger tube of described second outlet, and described heat exchanger tube extends in described fuel tank;
In described step S1, before described premixed gas is injected described combustion zone, first close described first outlet, open described second outlet; The heat that described premixed gas burning produces is to while described first porous media and described second porous media preheating, and the flue gas that burning produces enters in described fuel tank, to described fuel-firing preheating via described heat exchanger tube; After the fuel-firing preheating in described fuel tank is abundant, then open described first outlet, close described second outlet.
14. oil inflame methods as claimed in claim 12, it is characterized in that, described combustion zone is also provided with Secondary Air entrance;
In described step S1, while adopting described igniter to light described premixed gas, opening described Secondary Air entrance, by regulating the flow entering the Secondary Air of described Secondary Air entrance, making the combustion flame of described premixed gas keep stable;
In described step S3, after the oil inflame in described combustion zone is stable, continue to make described Secondary Air entrance be held open state.
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