CN100549517C - Fluidization-suspending two-stage type compound combustion device - Google Patents
Fluidization-suspending two-stage type compound combustion device Download PDFInfo
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- CN100549517C CN100549517C CNB2007101448937A CN200710144893A CN100549517C CN 100549517 C CN100549517 C CN 100549517C CN B2007101448937 A CNB2007101448937 A CN B2007101448937A CN 200710144893 A CN200710144893 A CN 200710144893A CN 100549517 C CN100549517 C CN 100549517C
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Abstract
Fluidization-suspending two-stage type compound combustion device, it relates to a kind of burner.Thereby the invention solves existing burner the bubbling fluidization bed combustor and the suspension combustion chamber be one the two produce mutual heat affecting and problem of the influence of flowing, can't be implemented in the same burner simultaneously fully burning particle diameter or two kinds of different solid-fuelled problems of combustion activity.The present invention includes bubbling fluidized bed low temperature combustor, high temperature whirlpool suspension combustion chamber, reducer chamber body, described high temperature whirlpool suspension combustion chamber is positioned at the top of bubbling fluidized bed low temperature combustor, and the lower end of high temperature whirlpool suspension combustion chamber is communicated with by reducer chamber body with the upper end of bubbling fluidized bed low temperature combustor; Described multilayer DC burner is distributed on the suspension side wall of furnace.The present invention has the advantage of efficiency of combustion height, sufficient combustion, has realized can fully burn simultaneously in same burner particle diameter or two kinds of different solid fuels of combustion activity.
Description
Technical field
The present invention relates to a kind of burner, be specifically related to a kind of while can carry out fluidisation, the burner of the two kinds of combustion systems that suspend.
Background technology
Fluidized bed combustion pollutes clean coal combustion technology low, that coal adaptability is good as a kind of, obtains in the last thirty years to use widely.But than coal-powder boiler of the same type, shortcoming such as also there is the unburned carbon in flue dust height in this combustion system, and efficiency of combustion is low has influenced the promotion and application of this combustion technology.And one of high reason of unburned carbon in flue dust is exactly that the fuel particle diameter is distributed more widely, and the time of staying in the combustion chamber of small size particle wherein is not enough.How to select a kind of combustion system efficiently at the particle diameter distribution of fuel and fuel is the emphasis that we consider.In addition, large-scale fluidized bed boiler of part or fluidized-bed gasification furnace have formed higher flying dust of a large amount of phosphorus content and end solid impurity particle because efficiency of combustion or gasification efficiency are lower in the process of its operation.How to handle these flying dusts and lime-ash particle, particularly carrying out integrated treatment under same technology is the direction that is worth research.
The bubbling fluidization bed combustor and the suspension combustion chamber of existing burner are one.Like this, bubbling fluidization bed combustor and suspension combustion chamber will produce direct heat exchange.This burner hearth form is unfavorable for each section of burner hearth temperature controlling, and on the one hand the temperature of suspension combustion chamber can reduce, and is unfavorable for catching fire and burning of fuel, is disadvantageous from the angle of efficiency of combustion; On the other hand, the temperature of bubbling fluidization bed combustor can improve again, may cause the coking of part low-melting-point material, influences the normal operation of burner.When the bubbling fluidization bed combustor directly links to each other with the suspension combustion chamber, fail to be convened for lack of a quorum from the up flue gas of bubbling fluidization burning peripheric jet flow is caused direct impact with certain fluctuation, make the stability of jet flame to guarantee.In addition, it is comparatively single that existing burner also exists in the mode that suspension section when burning send into fuel and air in the stove, specifically do not organize combustion system.
Summary of the invention
Thereby the present invention is the two problem that produces mutual heat affecting and flow and influence of one for bubbling fluidization bed combustor and the suspension combustion chamber that solves existing burner, can't be implemented in fully burn simultaneously in the same burner particle diameter or two kinds of different solid-fuelled problems of combustion activity, and then a kind of fluidization-suspending two-stage type compound combustion device is provided.
Technical scheme of the present invention is: a kind of fluidization-suspending two-stage type compound combustion device, it comprises bubbling fluidized bed low temperature combustor, high temperature whirlpool suspension combustion chamber and reducer chamber body, described high temperature whirlpool suspension combustion chamber is positioned at the top of bubbling fluidized bed low temperature combustor, and the lower end of high temperature whirlpool suspension combustion chamber is communicated with by reducer chamber body with the upper end of bubbling fluidized bed low temperature combustor; Described high temperature whirlpool suspension combustion chamber mainly is made up of suspension body of heater and multilayer DC burner, and described multilayer DC burner is distributed on the suspension side wall of furnace.
The present invention has following beneficial effect: the present invention has the advantage of efficiency of combustion height, sufficient combustion.The present invention is by being provided with reducer chamber body between bubbling fluidization bed combustor and suspension combustion chamber, certain separation has been done in two combustion chambers, the combustion chamber is divided into low temperature fluidized bed combustion and two sections of high temperature suspension combustion, realized in same burner can fully burn simultaneously particle diameter or two kinds of different solid fuels of combustion activity, the present invention also suspension section by fuel staging or air classification realize fine particle catch fire combustion process control and reduce the generation of nitrogen oxide.In addition, the present invention also has the following advantages: mainly concentrate on the burner hearth middle section from the up fluctuation of bubbling fluidization burning than the cold smoke air-flow, carry out rectification by middle reducer, reduce the fluctuation of air-flow, make up two phase flow not influence injecting of burner jet and tissue as far as possible burning; Further overheavy firing after being advanced into central high temperature suspension combustion district on unburnt particle in bottom and the fuel gas improves burnout rate; The cinder that the burning of high temperature suspension section forms falls into bottom bubbling bed by reducer and continues fluidized bed combustion, improves the burn-off rate of big slag.The present invention adopts the DC burner combustion system, and the mode that its DC burner is arranged is an arranged tangential on four jiaos of arranged tangential in combustion chamber or the wall, and its solid jet flow forms certain circle of contact and whirlpool combustion centre; The present invention is by being divided into three combustion zones, i.e. primary combustion zone, reburning zone and burning-out zone along the different burner of layout on the short transverse with suspension section.Burner is along being divided into multilayer on the short transverse, wherein each of main combustion zone layer burner supplied wind-powder mixture and auxiliary air respectively, reburning zone supply air-reburning fuel mixture, burning-out zone supply after-flame air, more than by fuel staging or air classification can realize fine particle catch fire combustion process control and reduce the generation of nitrogen oxide.When the fluidisation section burning chlorine-containing solid refuse fuel of burner bottom, high temperature section also helps the abundant cracking of the dioxin of incineration firing generation, and owing to the higher burn-off rate of system reduces excess air coefficient, and then the regeneration of the interior dioxin material of minimizing afterbody low temperature flue.Because the present invention adopts the suspension section high-temp combustion, so the fine grained sulfur content in fuel that requires suspension section to send into is lower.And the bubbling fluidized bed burning zone can add an amount of desulfurizing agent, and desulfurization product is discharged by scum pipe, but has the desulfurization product of parts of fine to enter behind the suspension section because high temperature is decomposed into SO once more with flue gas
2So this device should not the higher fuel of combustion of sulfur amount generally.Because temperature contrast is bigger between bottom of the present invention fluidisation section (bubbling fluidization bed combustor) and the top suspension section (suspension combustion chamber), can telescopic thermal expansion joint syndeton so need adopt being connected between bottom fluidisation section, middle reducer (reducer chamber body) and top suspension section.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention, Fig. 2 is the burner structural representation of band particle sorting apparatus, Fig. 3 is the structural representation of the specific embodiment six, Fig. 4 is the A-A cutaway view (the multilayer DC burner adopts angie type to be arranged on the sidewall of suspension body of heater 14) of Fig. 1, Fig. 5 is the A-A cutaway view (the multilayer DC burner adopts the wall formula to be arranged on the sidewall of suspension body of heater 14) of Fig. 1, and Fig. 6 is the A-A cutaway view (circular cross-section and corresponding multilayer DC burner layout drawing are adopted in bubbling fluidization bed combustor and suspension combustion chamber) of Fig. 1.
The specific embodiment
The specific embodiment one: as shown in Figure 1, the fluidization-suspending two-stage type compound combustion device of present embodiment is by bubbling fluidized bed low temperature combustor 3, high temperature whirlpool suspension combustion chamber 7, reducer chamber body 5, horizontal flue 15, back-end ductwork 16 is formed, described high temperature whirlpool suspension combustion chamber 7 is positioned at the top of bubbling fluidized bed low temperature combustor 3, the lower end of high temperature whirlpool suspension combustion chamber 7 is communicated with by reducer chamber body 5 with the upper end of bubbling fluidized bed low temperature combustor 3, the lower end of high temperature whirlpool suspension combustion chamber 7 is communicated with an end of horizontal flue 15, and the other end of horizontal flue 15 is communicated with the upper end of back-end ductwork 16.
The burner of present embodiment has been realized the combustion system of the compound combustion of bottom low temperature and top high temperature, is applicable to burn simultaneously particle diameter difference or two kinds of different fuel of combustion activity.Ignition temperature in the bubbling fluidized bed low temperature combustor 3 generally is not more than 1000 ℃, and high temperature whirlpool suspension combustion chamber 7 internal combustion temperature generally are not higher than fusion point of ash.
The specific embodiment two: as shown in Figure 1, the described reducer of present embodiment chamber body 5 is made up of converging transition chamber body 11, section chamber, permanent footpath body 12, divergent segment chamber body 13, and the upper end of described converging transition chamber body 11 is affixed with the lower end of divergent segment chamber body 13 by section chamber, permanent footpath body 12.Reducer chamber body 5 is mainly used to bubbling fluidized bed low temperature combustor 3 and high temperature whirlpool suspension combustion chamber 7 are separated into two relatively independent combustion spaces, organize bubbling fluidized bed gas fume after burning stream, increase the time of staying of particle, and the whereabouts passage that forms the big slag of a suspension combustion generation.Reducer chamber body 5 cross sections can be rectangle, square, circle or other shapes.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment three: as shown in Figure 1, the angle β that the described divergent segment of present embodiment chamber body 13 is become with horizontal plane is more than or equal to the mobile angle of repose of slag particle.Can adapt to the needs that the top and the bottom different fuel burns by angle and the size that changes reducer chamber body 5.Other composition is identical with the specific embodiment two with annexation.
The specific embodiment four: as shown in Figure 1, the described bubbling fluidized bed low temperature combustor 3 of present embodiment is made up of body of heater 9, material inlet 4, overfall 10, air distribution plate 2, slag-drip opening 8, described material inlet 4, overfall 10 are arranged on the sidewall of body of heater 9, air distribution plate 2 is horizontally set in the body of heater 9, and air distribution plate 2 is provided with slag-drip opening 8.The bottom compartment body of air distribution plate 2 is an air compartment 1.Bubbling fluidized bed low temperature combustor 3 be mainly used to burn big particle diameter, difficult to burn, low-calorie fuel particle.Its combustion chamber cross section can be rectangle, square, circle or other shapes.Can arrange in its combustion chamber that heating surface is used for carrying out heat exchange and control fire box temperature.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment five: shown in Fig. 1,4,5,6, the described high temperature whirlpool of present embodiment suspension combustion chamber 7 mainly is made up of suspension body of heater 14 and multilayer DC burner 6, and described multilayer DC burner 6 is distributed on the sidewall of suspension body of heater 14.The DC burner combustion system is adopted in described high temperature whirlpool suspension combustion chamber 7.The mode that described multilayer DC burner 6 is arranged is an arranged tangential on four jiaos of arranged tangential in combustion chamber or the wall, and its solid jet flow forms certain circle of contact and whirlpool combustion centre in stove.High temperature whirlpool suspension combustion chamber 7 is used for organizing burning by the fine grained fuel of multilayer DC burner 6 supplies with from the unburnt gas of bubbling fluidized bed low temperature combustor 3 and the remaining flammable matter in the flying dust.The suspension combustion chamber cross-section can be square or shape such as circle.Described high temperature whirlpool suspension combustion chamber 7 can be divided into three combustion zones, i.e. primary combustion zone B, reburning zone C, burning-out zone D.Mainly by fuel staging or air classification realize fine particle catch fire combustion process control and reduce the generation of nitrogen oxide.Multilayer DC burner 6 on the high temperature whirlpool suspension combustion chamber 7 is along being divided into multilayer on the short transverse, each layer burner of wherein main combustion zone B supplied wind-powder mixture and auxiliary air respectively, and reburning zone C supplies air-reburning fuel mixture.Burning-out zone D supply after-flame air.On the sidewall of the high temperature whirlpool suspension combustion chamber 7 between two multilayer DC burners 6, generally do not arrange heating surface,, guarantee catching fire and burning of fuel to keep the certain high temperature combustion space.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment six: as shown in Figure 2, present embodiment also comprises particle sorting apparatus 17, down pipe 18, material returning valve 19, the upper end of described particle sorting apparatus 17 is communicated with the upper end of high temperature whirlpool suspension combustion chamber 7, be communicated with by down pipe 18 between the upper end of the lower end of particle sorting apparatus 17 and material returning valve 19, material returning valve 19 is communicated with the upper end of bubbling fluidized bed low temperature combustor 3.Particle sorting apparatus 17 can separate solid particle in the flue gas, is transmitted back to continuous participation of bubbling fluidization bed combustor relaying by down pipe 18 and material returning valve 19 and circulates and burn, and further strengthens the total carbon burn-off rate of system.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment seven: as shown in Figure 3, present embodiment also comprises several spouts 20, and described several spouts 20 are arranged on the outer wall of converging transition chamber body 11.So design can realize that part air or fuel-air can be from spout 20 downward-sloping spraying in the stove.Other composition is identical with the specific embodiment one or six with annexation.
Claims (6)
1, a kind of fluidization-suspending two-stage type compound combustion device, it comprises bubbling fluidized bed low temperature combustor (3), high temperature whirlpool suspension combustion chamber (7) and reducer chamber body (5), described high temperature whirlpool suspension combustion chamber (7) is positioned at the top of bubbling fluidized bed low temperature combustor (3), and the lower end of high temperature whirlpool suspension combustion chamber (7) is communicated with by reducer chamber body (5) with the upper end of bubbling fluidized bed low temperature combustor (3); It is characterized in that: described high temperature whirlpool suspension combustion chamber (7) mainly is made up of suspension body of heater (14) and multilayer DC burner (6), and described multilayer DC burner (6) is distributed on the sidewall of suspension body of heater (14).
2, fluidization-suspending two-stage type compound combustion device according to claim 1, it is characterized in that described reducer chamber body (5) is made up of converging transition chamber body (11), permanent footpath section chamber body (12), divergent segment chamber body (13), the upper end of described converging transition chamber body (11) is affixed by the lower end of permanent footpath section chamber body (12) and divergent segment chamber body (13).
3, fluidization-suspending two-stage type compound combustion device according to claim 2 is characterized in that angle β that described divergent segment chamber body (13) become with horizontal plane is more than or equal to the slag particle angle of repose of flowing.
4, fluidization-suspending two-stage type compound combustion device according to claim 1, it is characterized in that described bubbling fluidized bed low temperature combustor (3) is made up of body of heater (9), material inlet (4), overfall (10), air distribution plate (2), slag-drip opening (8), described material inlet (4), overfall (10) are arranged on the sidewall of body of heater (9), air distribution plate (2) is horizontally set in the body of heater (9), and air distribution plate (2) is provided with slag-drip opening (8).
5, fluidization-suspending two-stage type compound combustion device according to claim 1, it is characterized in that it also comprises particle sorting apparatus (17), down pipe (18), material returning valve (19), the upper end of described particle sorting apparatus (17) is communicated with the upper end of high temperature whirlpool suspension combustion chamber (7), be communicated with by down pipe (18) between the lower end of particle sorting apparatus (17) and the upper end of material returning valve (19), material returning valve (19) is communicated with the upper end of bubbling fluidized bed low temperature combustor (3).
6, fluidization-suspending two-stage type compound combustion device according to claim 1 or 5 is characterized in that it also comprises several spouts (20), and described several spouts (20) are arranged on the outer wall of converging transition chamber body (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101448937A CN100549517C (en) | 2007-12-21 | 2007-12-21 | Fluidization-suspending two-stage type compound combustion device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101448937A CN100549517C (en) | 2007-12-21 | 2007-12-21 | Fluidization-suspending two-stage type compound combustion device |
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| CN101196294A CN101196294A (en) | 2008-06-11 |
| CN100549517C true CN100549517C (en) | 2009-10-14 |
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| CNB2007101448937A Expired - Fee Related CN100549517C (en) | 2007-12-21 | 2007-12-21 | Fluidization-suspending two-stage type compound combustion device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727528A (en) * | 2014-01-10 | 2014-04-16 | 哈尔滨工业大学 | Series-connected compounded gas gasification and combustion fluidized bed-pulverized coal furnace |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876339B (en) * | 2012-10-17 | 2013-12-25 | 哈尔滨工业大学 | Gasification and splitting reaction device |
| CN106765061B (en) * | 2017-01-05 | 2023-07-11 | 东方电气集团东方锅炉股份有限公司 | Pulverized coal boiler furnace with variable cross section of burner area and flexibility peak regulation |
| CN111637461A (en) * | 2020-06-08 | 2020-09-08 | 山东理工大学 | Combustor with beam waist type furnace structure |
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| DE4016894A1 (en) * | 1990-05-25 | 1991-12-05 | Hoelter Heinz | Redn. of carbon monoxide, nitrous oxide and sulphur di:oxide - involves expeller-eddy producer mixing flue gas with secondary and tertiary air |
| CN1068642A (en) * | 1991-04-15 | 1993-02-03 | 株式会社荏原制作所 | Incinerator |
| CN2299993Y (en) * | 1997-06-13 | 1998-12-09 | 清华大学 | Quick-loading fluidized-bed incinerator for incinerating solid waste |
| CN1445477A (en) * | 2003-05-08 | 2003-10-01 | 上海交通大学 | Combined circulating fluid bed boiler |
| CN2588213Y (en) * | 2002-12-27 | 2003-11-26 | 李爱民 | Sectional fluidized-bed medical refuse burning furnace |
| CN2630771Y (en) * | 2003-06-12 | 2004-08-04 | 武汉理工大学 | Muti stage decomposing furnace |
| CN1696569A (en) * | 2004-05-12 | 2005-11-16 | 清华大学 | Boiler of circulating fluid bed for burning household garbage |
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2007
- 2007-12-21 CN CNB2007101448937A patent/CN100549517C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4016894A1 (en) * | 1990-05-25 | 1991-12-05 | Hoelter Heinz | Redn. of carbon monoxide, nitrous oxide and sulphur di:oxide - involves expeller-eddy producer mixing flue gas with secondary and tertiary air |
| CN1068642A (en) * | 1991-04-15 | 1993-02-03 | 株式会社荏原制作所 | Incinerator |
| CN2299993Y (en) * | 1997-06-13 | 1998-12-09 | 清华大学 | Quick-loading fluidized-bed incinerator for incinerating solid waste |
| CN2588213Y (en) * | 2002-12-27 | 2003-11-26 | 李爱民 | Sectional fluidized-bed medical refuse burning furnace |
| CN1445477A (en) * | 2003-05-08 | 2003-10-01 | 上海交通大学 | Combined circulating fluid bed boiler |
| CN2630771Y (en) * | 2003-06-12 | 2004-08-04 | 武汉理工大学 | Muti stage decomposing furnace |
| CN1696569A (en) * | 2004-05-12 | 2005-11-16 | 清华大学 | Boiler of circulating fluid bed for burning household garbage |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727528A (en) * | 2014-01-10 | 2014-04-16 | 哈尔滨工业大学 | Series-connected compounded gas gasification and combustion fluidized bed-pulverized coal furnace |
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| CN101196294A (en) | 2008-06-11 |
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