CN102679541A - Biomass fuel pulse combustion hot blast device and use method thereof - Google Patents
Biomass fuel pulse combustion hot blast device and use method thereof Download PDFInfo
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- CN102679541A CN102679541A CN2012101826607A CN201210182660A CN102679541A CN 102679541 A CN102679541 A CN 102679541A CN 2012101826607 A CN2012101826607 A CN 2012101826607A CN 201210182660 A CN201210182660 A CN 201210182660A CN 102679541 A CN102679541 A CN 102679541A
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Abstract
The invention discloses a biomass fuel pulse combustion hot blast device and a use method thereof. The biomass fuel pulse combustion hot blast device adopts the technical scheme by including a base (20), wherein a Rijke pulse combustor main body is mounted on the base (20); the Rijke pulse combustor main body includes a furnace chamber barrel body (16), a lower air pipe (4) and an upper air outlet pipe (9) from bottom to top; a grate (17) is mounted at the L position x=(0.12 to 0.26) away from the lower end of the Rijke pulse combustor main body; a rotary distributing rod (6) is arranged on the grate (17); and a feeding device including a feeding and speed regulating motor (7) and a spiral feeder (8) is arranged on the side wall of the furnace chamber barrel body (16). When the biomass fuel pulse combustion hot blast device is in use, the temperature in the combustion chamber is kept between 800 to 950 degrees. The biomass fuel pulse combustion hot blast device and the use method thereof solve the problems of insufficient combustion, caking and slag bonding during the biomass fuel combusting process, and provide a heat source with simple structure, efficiency in combustion and low manufacturing and use costs for drying agricultural products and the like.
Description
Technical field
The present invention relates to a kind of hot air heating apparatus, especially a kind of biomass fuel intermittent combustion formula hot air heating apparatus and method for using thereof.
Background technology
Hot-blast heater is widely used hot air heating apparatus, but it has problems such as complex structure, cost is high, the thermal efficiency is low.People are seeking a kind of simple in structure always, and cost is low, the hot air heating apparatus that fuel source is wide.
Living beings are to rank coal, oil and natural gas world's fourth largest energy afterwards; Current, the consumption of biomass fuel has accounted for 14% of world energy sources total flow, this ratio in developing country up to 38%; According to estimates; Produce about 1,000 hundred million tons ~ 1,250 hundred million tons dry biomass on the earth land year, produce 50,000,000,000 tons of dries ocean year, its total amount is equivalent to 10 times of world's total energy consumption.
Biomass fuel is because problems such as alkali metal content than higher, therefore takes place to gather in heating surface fouling, the stove when burning easily, slagging scorification, and this phenomenon can not avoid, and become the significant obstacle in the biomass utilization process.The living beings calorific value is low, and shared ash rate is bigger, and the after-flame difficulty causes biomass combustion to be faced with problems.When adopting fluidized bed combustion, alkali metal possibly form low-melting cocrystalization compound and cause agglomeration with the reaction of bed material, causes fluidised form to worsen.Receive Influence of Temperature bigger in the biomass combustion process, when high temperature, it is short that the living beings volatile matter is separated out the time; The amount of separating out is big, and a large amount of volatile matters of separating out at short notice can cause violent burning, are unfavorable for the control of burning; The airborne oxygen of burning lot of consumption; Volatile combustion produces great amount of heat, and fire box temperature is sharply risen, and slagging scorification generates easily.
Intermittent combustion is different from conventional smooth combustion process; Be under certain acoustic condition; State parameter in the combustion zone in the sign combustion process such as steady-state quantities such as temperature, pressure, air velocity and rate of heat release are the combustion process of cyclic fluctuation in time all; It is the burning of the flow parameter generating period property pulsatile change of fuel and oxygen in the combustion process; This technology can reach very high efficiency of combustion at lower excess air coefficient and limited combustion space, and has high combustion intensity, and has advantages such as heat transfer coefficient, smoke-discharging pollution be little.In normal burner, maximum combustion intensity has only 840kW/m usually
3, the heat transfer intensity of unit are reaches as high as 20kW/m
2, and the pulsating combusting device combustion intensity can reach 58000kW/m
3, the unit are heat transfer intensity can surpass 150kW/m
2
Pulsating combusting device is the device that produces intermittent combustion.In recent years a large amount of research has been carried out in intermittent combustion, mainly concentrated on pulsating Combustion Technology with fuel such as coal, oil and natural gas.
Zinn has designed a kind of long 1.83m; The coal-fired pulsating combusting device [US005176513A] of internal diameter 254mm band rotation fire grate; This pulsating combusting device is the straight pipe type burner, and the rotation fire grate that install the bottom, combustion chamber can reduce the accumulation of material skewness and dust stratification.But revolving burner grate not only energy consumption is big, and because material rotates with fire grate synchronously, has increased and leaked the material loss, can not improve the burning condition of material.
It is the pulsating combusting device [CN2031871U] of fuel with the coal that people such as Wang Jiayin have designed a kind of, and it is by the combustion chamber, lower air conduit, last discharge pipe; Boiler, a kind of pan shell type burning boiler that secondary muffler etc. are formed, the hot acoustical coupling of the gentle stream of pressure during owing to burning; Therefore common coal or colm can burn; This device is the domestic patent of studying the pulse combustion device of coal the earliest, because the approval of early stage market is few, this device does not obtain bigger application.
People such as Cheng Leming have designed a kind of pulsate fluidizing bed combustor [CN1740635A]; The L/12-3L/4 place of gram pipe is provided with air distribution plate in the lining; L is a combustion chamber main body pipe range; Outside the main wall of combustion chamber, be provided with heater, the combustion chamber main body is provided with heat-exchange surface, between hot heating surface and heat-exchange surface, is designed with charging gear.This device material adaptability is narrow, poor practicability.
Traditional biomass fuel burning technology, not only the complex structure of equipment, manufacturing cost are high, and exist the material burning insufficient, are easy to generate slagging scorification, clustering phenomena.
Because the biomass fuel calorific value is low, the burning is insufficient, the ash content after the burning, residue are not easy factors such as cleaning, also do not have the pulse combustion device of the biomass fuel of practicality to can be used for the heating of hot blast at present.
Summary of the invention
The objective of the invention is to provide a kind of biomass fuel intermittent combustion formula hot air heating apparatus to reach
Its method for using, biomass fuel combustion is insufficient to solve, the problem of dust stratification, slagging scorification.
In order to reach the object of the invention, the technical scheme of being taked comprises, base 20; Rieke type pulsating combusting device main body is installed on base 20, and this pulsating combusting device main body comprises burner hearth cylindrical shell 16, and airduct 4 is set in the below of burner hearth cylindrical shell 16; Apart from pulsating combusting device main body lower end height x=(0.12～0.26) L place; In burner hearth cylindrical shell 16, fire grate 17 is installed, on fire grate 17, be provided with rotation boom 6; The sidewall of burner hearth cylindrical shell 16 is provided with the feed arrangement that comprises the screw input feeder 8 that is driven by feeding buncher 7, and biomass material is delivered to burner hearth cylindrical shell 16 inside through screw input feeder 8 under the drive of feeding buncher 7; The top of burner hearth cylindrical shell 16 is provided with coupling chamber 10, with coupling chamber 10 is connected cyclone separator 11 is arranged; Top in this pulsating combusting device main body also is provided with wind-supplying mouth 13.Through blast pipe 4, the high temperature blending constituent that the burner hearth internal combustion produces is got rid of dust, powder then through overcoupling chamber 10 under the effect of cyclone separator 11, clean hot-air is offered drying equipment.
In the above-mentioned biomass fuel intermittent combustion formula hot air heating apparatus, the draw ratio of said pulsating combusting device main body is L/D=11, and wherein: L is the burner body length overall, and D is the internal diameter of burner burner hearth cylindrical shell 16.
In the above-mentioned biomass fuel intermittent combustion formula hot air heating apparatus, said feed arrangement is installed in 0.35～0.37 place of the height apart from the burner body lower end.
In the above-mentioned biomass fuel intermittent combustion formula hot air heating apparatus; Side at base 20 is equipped with air inlet 1; Base inside is equipped with the cloth of being made up of relay 19, buncher 18, universal joint 3 transmission system that sweeps up dust, and said universal joint 3 is connected with rotation boom 6, and drives its rotation; Realize the even distribution of fuel on fire grate on the one hand, all right on the other hand break, deashing.Base 20 volumes are 5 times of combustion chamber, are used for steady air flow and abate the noise.The bottom of base 20 is provided with flue-dust retainer 2, and flue-dust retainer 2 is used to collect the gap material that fall and the dust stratification that burn produce of mechanical loss from fire grate 17.
In the above-mentioned biomass fuel intermittent combustion formula hot air heating apparatus; The upper end of said burner hearth cylindrical shell 16 is provided with conically shaped 14, and this conically shaped 14 and burner hearth cylindrical shell 16 formation combustion chambers, conically shaped 14 shrink the burner hearth that forms relative closure through diameter; Have the reflection hot-fluid simultaneously, promote the effect of burning.
In the above-mentioned biomass fuel intermittent combustion formula hot air heating apparatus, scribble high-temperature flame-proof layer 15 at the inwall of burner hearth cylindrical shell 16 and conically shaped 14, outer wall superscribes alumina silicate hydrochloric acid insulation quilt 5.
In the above-mentioned biomass fuel intermittent combustion formula hot air heating apparatus; Be provided with combustion-supporting net 12 said conically shaped 14 suitable for reading; Combustion-supporting net 12 is formed combustion-supporting system with wind-supplying mouth 13; Particle that elutriation is flown out and imperfect combustion flue gas are held back, and delay the rise time, and carry out completing combustion with the new wind that gets into through wind-supplying mouth 13.Combustion-supporting net 12 has reflection concurrently, holds back and promotes the multi-efficiency that burns.
Comprise in order to reach the technical scheme that another object of the present invention takes; In the use of above-mentioned biomass fuel intermittent combustion formula hot air heating apparatus; Feed rate through buncher 7 adjustable screw feeders 8 is supplied with the biomass fuel that burner carries out continuous and quantitative; Regulate rotating speed to realize the abundant burning of variety classes biomass fuel,, the combustion chamber temperature scope is maintained 800～950 ℃ through changing the aeration quantity of fuel feed speed and wind-supplying mouth 13.
The present invention has following advantage:
1, the combination of intermittent combustion and living beings.
Characteristics with biomass fuel; As originate extensively, output is abundant, with low cost; Can alleviate dependence to fossil fuel; And idle, waste and the contaminated environment and intermittent combustion intensity height, sufficient combustion, energy efficient, the little characteristics of disposal of pollutants that have reduced crops combine, and have produced a kind of new burning form.
2, the fuel source scope is wide.
China has huge biomass energy resource, and the rural area exists in a large number and left unused, the biomass fuels such as agricultural crop straw of waste, and output is abundant, cheap, and distribution is extensive.
3, avoid conglomeration, slagging scorification.
Experiment showed, because the interior temperature maintenance of burner hearth between 800～950 ℃, has been avoided biomass fuel because conglomeration, the slagging scorification phenomenon that temperature causes.
4, fuel combustion conditions is good.
The rotation of rotation boom 6 intermittent periods it; Periodic Rotating can strengthen having fired the mixing of thing and unburning material; Improve the fuel oxygen supply condition, the intensity of the preheating between the reinforcement fuel, drying, heat release, intermittent movement can be avoided rough burning; The steady heat release strength reduces the interference of impulse excitation.Biomass fuel is owing to be fully burned; The ash content that generates is taken out of the combustion chamber at the self-priming that the pulsation self-excitation produces in row's process; Not only reduced ash content and fuel surface and reduced heat transference efficiency because of parcel; Avoid adhering to, be stained with to inhale and produce conglomeration, slagging scorification phenomenon, and the minimizing of ash content helps obtaining good inlet air conditions in the burner hearth, help abundant burning.
5, reduce dust stratification.
Because burner self is an acoustic wave source; The higher-order of oscillation sound wave energy that intermittent combustion produces effectively reduces because flying dust sticks to the hot-spot phenomenon that causes of inner-walls of duct, thereby increases the coefficient of heat transfer, reduce that dust stratification results in blockage and temperature distributing disproportionation causes the explosion phenomenon of pipeline.
6, noise is low.
Because base 20 volumes are 5 times of the combustion chamber; Obtain good steady air flow and abated the noise effect; And the biomass fuel calorific value of burning is lower, has absorbed acoustic wave segment at the burner endogenous substance, and therefore actual similar coal-fired pulsating combusting device of noise ratio that produces or burnt gas pulsating combusting device are little a lot; Have only 70～90dB, can be than being easier to realize the de-noising function.
7, simple in structure, low cost of manufacture.
Because the hot acoustical coupling effect that intermittent combustion produces; Make this equipment have bigger furnace heat release and grate area calorific intensity; Therefore the combustion chamber can be designed compactly; And because the self-priming effect, this device need not air blast and smoke suction machine just can be realized burning stable, that continue, has reduced the manufacturing cost of processing greatly.
Description of drawings
Fig. 1 is the structural representation of this biomass fuel intermittent combustion formula hot air heating apparatus;
Fig. 2 is cloth, deashing, break apparatus structure sketch map;
Fig. 3 is the structural representation of fire grate;
Pressure amplitude dynamic waveform figure when Fig. 4 is the work of this biomass fuel intermittent combustion formula hot air heating apparatus;
The temperature changing curve diagram of burner hearth and tail gas when Fig. 5 is the work of this biomass fuel intermittent combustion formula hot air heating apparatus.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
As shown in Figure 1, apparatus of the present invention comprise air inlet 1, flue-dust retainer 2, universal joint 3, lower air conduit 4, alumina silicate hydrochloric acid insulation quilt 5, rotation boom 6, feeding buncher 7, screw input feeder 8, go up discharge pipe 9, coupling chamber 10, cyclone separator 11, combustion-supporting net 12, wind-supplying mouth 13, conically shaped 14, high-temperature flame-proof layer 15, burner hearth cylindrical shell 16, fire grate 17, buncher 18, relay 19, base 20.
Rieke type pulsating combusting device main body is installed on base 20, and this pulsating combusting device main body comprises lower air conduit 4, burner hearth cylindrical shell 16, conically shaped 14 and last discharge pipe 9 from the bottom to top successively.In the burner hearth cylindrical shell 16 between its lower end height x=(0.12～0.26) L, fire grate 17 is installed in this pulsating combusting device main body; On fire grate 17, be provided with rotation boom 6; The sidewall of burner hearth cylindrical shell 16 is provided with feed arrangement; This feed arrangement comprises feeding buncher 7 and screw input feeder 8, and feed arrangement is installed in 0.35～0.37 place of pulsating combusting device body height, and biomass material is delivered to burner hearth cylindrical shell 16 inside through screw input feeder 8 under the drive of feeding buncher 7; The upper end of burner hearth cylindrical shell 16 is provided with conically shaped 14, and conically shaped 14 constitutes high efficiency combustion chamber with burner hearth cylindrical shell 16; The upper end of conically shaped 14 is linked in sequence and goes up discharge pipe 9, coupling chamber 10, and what be connected with coupling chamber 10 has a cyclone separator 11.Here " L " is meant the height of pulsating combusting device main body, i.e. vertical height between the upper end of the lower end of lower air conduit 4 to discharge pipe 9.
The draw ratio of pulsating combusting device main body is L/D=11, and L is a pulsating combusting device main body length overall, and D is the internal diameter of burner burner hearth cylindrical shell 16; Experiment shows; This draw ratio is applicable to the intermittent combustion of biomass fuel, not only can obtain higher grate area calorific intensity, and pulsation sound intensity intensity is big; And flue gas resistance is little, the material sufficient combustion.
As shown in Figure 3, the middle part of fire grate 17 is provided with is convenient to rotate boom 6 and the cloth hole that transmission system is connected that sweeps up dust.
In order to reach better combustion efficiency, scribble high-temperature flame-proof layer 15 at the inwall of burner hearth cylindrical shell 16 and conically shaped 14, outer wall superscribes alumina silicate hydrochloric acid insulation quilt 5.
Through gas igniter or hot-wire ignition device biomass fuel is lighted a fire.When fuel burns continually and steadily, remove igniter, the pulsation self-excitation produces behind the 1min, and the rotating speed that adjust feeding motor 7 this moment is the low-speed running charging.When lasting, the strong sound is sent in intermittent combustion, increase the rotating speed of feeding buncher 7.
The burner hearth cylindrical shell adopts the pipe Bolt Connection of multistage different-diameter to form; Conically shaped 14 is made the variable cross-section shape of round platform, can not only effectively reduce the loss of sound wave, and has reduced the direct burning of thermal-flame; The form of reducing more helps poking fire, and can significantly improve the suction pressure of burner.Lower air conduit 4 diameters not only can be avoided the loss of sound wave, and can strengthen the air inlet sectional area greater than the diameter of last discharge pipe 9, make air inlet even, stable.
Burner adopts screw input feeder 8 horizontal feeds, can reduce because the rough burning that material falls to causing.Owing to adopted feeding buncher 7; Can adapt to the burning of variety classes biomass fuel; Through regulating charging rate; Can control combustion chamber temperature, the temperature in the burner hearth is controlled at 800～950 ℃ of the suitable scopes of biomass fuel, avoid because the burning that temperature fluctuation causes insufficient with conglomeration, slagging scorification phenomenon.
Pressure amplitude dynamic waveform figure when Fig. 4 is the work of this biomass fuel intermittent combustion formula hot air heating apparatus.Sine wave curve by among the figure can know that the intermittent combustion of this device continues, stablizes.
Burner hearth cylindrical shell 16 reached the temperature changing curve diagram of going up discharge pipe 9 when Fig. 5 was the work of this biomass fuel intermittent combustion formula hot air heating apparatus.The temperature fluctuation range of burner hearth cylindrical shell 16 middle part inner faces is between 800～920 ℃, and last discharge pipe 9 exit exhaust temperature scopes are 400～500 ℃.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (9)
1. a biomass fuel intermittent combustion formula hot air heating apparatus is characterized in that, comprises base (20); Rieke type pulsating combusting device main body is installed on base (20); This pulsating combusting device main body comprises burner hearth cylindrical shell (16), lower air conduit (4) and goes up discharge pipe (9), apart from pulsating combusting device main body lower end height x=(0.12～0.26) L place, and burner hearth cylindrical shell (16) inside; Fire grate (17) is installed, on this fire grate (17), is provided with rotation boom (6); The sidewall of burner hearth cylindrical shell (16) is provided with the feed arrangement that comprises the screw input feeder (8) that is driven by feeding buncher (7), and biomass material is delivered to burner hearth cylindrical shell (16) inside through screw input feeder (8) under the drive of feeding buncher (7); The top of burner hearth cylindrical shell (16) is provided with coupling chamber (10), with coupling chamber (10) is connected cyclone separator (11) is arranged; Also be provided with wind-supplying mouth (13) on the top of this pulsating combusting device main body.
2. biomass fuel intermittent combustion formula hot air heating apparatus according to claim 1 is characterized in that the draw ratio of said pulsating combusting device main body is L/D=11.
3. biomass fuel intermittent combustion formula hot air heating apparatus according to claim 1 is characterized in that said feed arrangement is installed in 0.35～0.37 place of pulsating combusting device body height.
4. according to claim 1 or 2 or 3 described biomass fuel intermittent combustion formula hot air heating apparatus; It is characterized in that; Side at base (20) is equipped with air inlet (1); Base inside is equipped with the cloth of being made up of relay (19), buncher (18), universal joint (3) transmission system that sweeps up dust, and said universal joint (3) is connected with rotation boom (6), and drives its rotation.
5. according to claim 1 or 2 or 3 described biomass fuel intermittent combustion formula hot air heating apparatus, it is characterized in that the bottom of said base (20) is provided with flue-dust retainer (2), be used for collecting lime-ash and the material that falls from the gap of fire grate (17).
6. according to claim 1 or 2 or 3 described biomass fuel intermittent combustion formula hot air heating apparatus, it is characterized in that the upper end of said burner hearth cylindrical shell (16) is provided with conically shaped (14), this conically shaped (14) constitutes the combustion chamber with burner hearth cylindrical shell (16).
7. biomass fuel intermittent combustion formula hot air heating apparatus according to claim 6 is characterized in that, scribbles high-temperature flame-proof layer (15) at the inwall of said burner hearth cylindrical shell (16) and conically shaped (14), and outer wall superscribes alumina silicate hydrochloric acid insulation quilt (5).
8. biomass fuel intermittent combustion formula hot air heating apparatus according to claim 6 is characterized in that, at the combustion-supporting net (12) that is provided with suitable for reading of said conically shaped (14), combustion-supporting net (12) is formed combustion-supporting system with wind-supplying mouth (13).
9. method for using like claim 1 or 2 or 3 described biomass fuel intermittent combustion formula hot air heating apparatus; It is characterized in that; Feed rate through buncher (7) adjustable screw feeder (8) is supplied with the biomass fuel that burner carries out continuous and quantitative; Regulate rotating speed to realize the abundant burning of variety classes biomass fuel,, the combustion chamber temperature scope is maintained 800～950 ℃ through changing the aeration quantity of fuel feed speed and wind-supplying mouth (13).
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| CN2012101826607A CN102679541A (en) | 2012-06-05 | 2012-06-05 | Biomass fuel pulse combustion hot blast device and use method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949122A (en) * | 2015-06-12 | 2015-09-30 | 贵州盘江煤层气开发利用有限责任公司 | Oxygen-enriched gas pulsating combustion device |
| CN107859995A (en) * | 2017-12-08 | 2018-03-30 | 山西大学 | A kind of Rijke type pulse combustion systems for coal-burning boiler |
| CN108144948A (en) * | 2017-12-13 | 2018-06-12 | 合肥能源研究院 | A kind of distribution agriculture and forestry organic waste material utilizes system and method |
| CN108775708A (en) * | 2018-07-30 | 2018-11-09 | 杨光辉 | A kind of multi-functional two level high temperature booster burners |
| CN109186246A (en) * | 2018-07-26 | 2019-01-11 | 合肥三伍机械有限公司 | A kind of hot-blast stove for grain drying |
| CN109724393A (en) * | 2017-10-27 | 2019-05-07 | 井关农机株式会社 | Crop drying machine |
| CN112902182A (en) * | 2021-02-08 | 2021-06-04 | 湖州明境环保科技有限公司 | Dangerous waste incineration treatment system |
| CN117168627A (en) * | 2023-11-03 | 2023-12-05 | 北京航空航天大学 | Device and method for measuring heat release rate pulsation |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949122A (en) * | 2015-06-12 | 2015-09-30 | 贵州盘江煤层气开发利用有限责任公司 | Oxygen-enriched gas pulsating combustion device |
| CN109724392B (en) * | 2017-10-27 | 2022-04-01 | 井关农机株式会社 | Crop dryer |
| CN109724393A (en) * | 2017-10-27 | 2019-05-07 | 井关农机株式会社 | Crop drying machine |
| CN109724392A (en) * | 2017-10-27 | 2019-05-07 | 井关农机株式会社 | Crop drying machine |
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| CN108144948A (en) * | 2017-12-13 | 2018-06-12 | 合肥能源研究院 | A kind of distribution agriculture and forestry organic waste material utilizes system and method |
| CN109186246A (en) * | 2018-07-26 | 2019-01-11 | 合肥三伍机械有限公司 | A kind of hot-blast stove for grain drying |
| CN108775708A (en) * | 2018-07-30 | 2018-11-09 | 杨光辉 | A kind of multi-functional two level high temperature booster burners |
| CN108775708B (en) * | 2018-07-30 | 2023-11-28 | 杨光辉 | Multifunctional two-stage high-temperature combustion-supporting burner |
| CN112902182A (en) * | 2021-02-08 | 2021-06-04 | 湖州明境环保科技有限公司 | Dangerous waste incineration treatment system |
| CN112902182B (en) * | 2021-02-08 | 2022-02-11 | 湖州明境环保科技有限公司 | Dangerous waste incineration treatment system |
| CN117168627A (en) * | 2023-11-03 | 2023-12-05 | 北京航空航天大学 | Device and method for measuring heat release rate pulsation |
| CN117168627B (en) * | 2023-11-03 | 2024-01-23 | 北京航空航天大学 | Device and method for measuring heat release rate pulsation |
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Application publication date: 20120919 |