CN103512029B - The organic working medium boiler of coal-fired fluidized bed burning - Google Patents
The organic working medium boiler of coal-fired fluidized bed burning Download PDFInfo
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- CN103512029B CN103512029B CN201310479681.XA CN201310479681A CN103512029B CN 103512029 B CN103512029 B CN 103512029B CN 201310479681 A CN201310479681 A CN 201310479681A CN 103512029 B CN103512029 B CN 103512029B
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- fluidized bed
- medium boiler
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Abstract
The invention discloses a kind of organic working medium fluidized-bed combustion boiler using coal fuel, comprise air-distribution device, combustion chamber, whirlpool separation burning device, afterbody convection heating surface parts, combustion chamber is divided into emulsion zone and dilute-phase zone, air-distribution device is provided with piece of cloth aerofoil, air distribution plate is V-shape, air distribution plate establishes air vent, and air vent is arranged in order to edge in the middle part of air distribution plate and area reduces gradually; Emulsion zone adopts inverted trapezoidal shape structure, and the recirculating zone of emulsion zone arranges pipe laying; Dilute-phase zone surrounding arranges water-cooling wall; Dilute-phase zone top arranges whirlpool and is separated burning device; Whirlpool is separated burning device rear portion and arranges described afterbody convection heating surface parts; Organic working medium boiler uses coal fuel.The present invention uses coal particle to replace water-coal-slurry, has exempted from but pulping process, has reduced the use cost of organic working medium boiler.
Description
Technical field
The present invention relates to a kind of Industrial Boiler, particularly relate to a kind of organic working medium boiler of coal-fired fluidized bed burning.
Background technology
Organic working medium boiler can under lower operating pressure, obtain higher operating temperature, have the technical characteristic of low pressure, high temperature, and utilize compared with Steam Heating, organic working medium has the advantages such as homogeneous heating, simple to operate, safety and environmental protection, economize energy, temperature-controlled precision are high, operating pressure is low.Therefore, in modern industry is produced, organic working medium is widely used by as heat transfer medium.Tradition organic working medium boiler adopts grate firing or room combustion combustion system, and main Problems existing is: maximum combustion temperature more than 1450 DEG C, easy coking; Ignition condition is poor, combustion instability; Boiler coal bad adaptability, need the above bituminous coal of II class as fuel, operating cost is high; Load regulation range is little, easily makes that combustion rate is low significantly to be reduced during underload; Belong to high-temp combustion, pollutant emission is high.
The existence of problems have impact on popularization and the use of organic working medium boiler, and research and development are a kind of substitutes traditional organic working medium boiler, is significant to the application of organic working medium boiler technology and energy-saving and emission-reduction.Those skilled in the art is devoted to the organic working medium boiler manufacturing and designing a kind of coal-fired fluidized bed burning.
Summary of the invention
Because the defect of prior art, technical problem to be solved by this invention is to provide a kind of organic working medium boiler of coal-fired fluidized bed burning, expands the source of organic working medium boiler oil, reduces its use cost.
For achieving the above object, the invention provides a kind of organic working medium boiler of coal-fired fluidized bed burning, comprise air-distribution device, combustion chamber, whirlpool separation burning device, afterbody convection heating surface parts, combustion chamber is divided into emulsion zone and dilute-phase zone, it is characterized in that, air-distribution device is provided with piece of cloth aerofoil, and air distribution plate is V-shape, air distribution plate establishes air vent, and air vent is arranged in order to edge in the middle part of air distribution plate and area reduces gradually; Emulsion zone adopts inverted trapezoidal shape structure, and the recirculating zone of emulsion zone arranges pipe laying; Dilute-phase zone surrounding arranges water-cooling wall; Dilute-phase zone top arranges whirlpool and is separated burning device; Whirlpool is separated burning device rear portion and arranges afterbody convection heating surface parts; The coal particle that organic working medium boiler use particle diameter is 0.001-20mm is as fuel.
Air distribution plate is V-shape, the larger particles on air distribution plate can be made to move in the middle part of trend air distribution plate, the drainage conduit of larger particles successfully in the middle part of air distribution plate affecting fluidization quality can be made like this to discharge, vent area in the middle part of air distribution plate is larger, progressively reduce to edge area, make the air output at middle part large like this, and more less to edge air output, the air supply mode that this air quantity is uneven, impels the Inner eycle motion forming fluidized bed material and fuel particle in emulsion zone inside.The emulsion zone of combustion chamber adopts inverted trapezoidal shape structure, the Inner eycle strengthening above-mentioned fluidized bed material and fuel particle moves, pipe laying is set in the recirculating zone of emulsion zone and forms heating surface, to absorb the heat that emulsion zone fuel combustion discharges, make emulsion zone bed temperature control at 850 ~ 1050 DEG C; Pipe laying is arranged in the recirculating zone of inverted trapezoidal shape emulsion zone, avoids the pipe laying Fast Wearing that primary air above air distribution plate causes with particle directly washes away.
Preferably, air vent is elongate holes or circular port.
Preferably, pipe laying is arranged on both sides or the surrounding of described recirculating zone.
Preferably, pipe laying outer surface is welded with wearing ring or abrasionproof fin, to alleviate the wearing and tearing of fuel to pipe laying further, extends the service life of pipe laying; After stopping pipe laying breakage, organic working medium is leaked into the security incident that combustion chamber causes.
Preferably, water-cooling wall is square spiral coil wall, the radiations heat energy of abundant efficient absorption high-temperature flue gas and convection heat, makes whole combustion chamber cigarette temperature lower than ash fusion point, prevents combustion chamber and the coking of subsequent thermal face.
Preferably, whirlpool is separated burning device and comprises water cooling tube, and water cooling tube lays refractory material, and whirlpool is separated burning device bottom and is provided with feedback passage.The coal particle group separated enters emulsion zone through feeding back passage slippage, achieves the circulating combustion of fuel, and what enhance fuel gas and air mixes after-flame, overcomes the defect that Industrial Boiler short and small space combustion efficiency is on the low side.
Preferably, convection heating surface parts are tube bank, one of economizer or air preheater, absorb the heat of flue gas further, make exhaust gas temperature be down to reasonable level.
Preferably, described coal particle particle diameter is less than 10mm.The tiny coal particle of particle diameter is adopted to be conducive to improving fluidization quality, and the Thorough combustion of coal particle.
Preferably, organic working medium boiler also comprises fuel dog-house, is arranged on dilute-phase zone front wall or left and right wall, can adapts to different operating environments.
The invention has the beneficial effects as follows: achieve coal low temperature, high performance clean burning in organic working medium boiler, and have that load adjustment ability is good, operating cost is low, reduce labour intensity, reduce use cost, direct desulfurization denitration in combustion, the economic desulfurization of the degree of depth can be implemented to combustion process, reduce the discharge of NOx, auxiliary corollary system succinct reliable, save the advantages such as equipment investment.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of an organic working medium boiler preferred embodiment of the coal-fired fluidized bed burning of the present invention;
Fig. 2 is the structural representation of the air distribution plate in Fig. 1;
Fig. 3 is another structural representation of the air distribution plate that Fig. 1 plants.
Detailed description of the invention
As shown in Figure 1, the organic working medium boiler of coal-fired fluidized bed burning that preferred embodiment of the present invention provides comprises: bellows 1, air distribution plate 2, emulsion zone 3, fuel dog-house 4, dilute-phase zone 5, whirlpool are separated burning device 6, afterbody convection heating surface parts 7, exhaust pass 8.
As the coal in organic working medium boiler of the present invention, need to be broken into comparatively fine granularity in advance, at least should ensureing that coal particle particle diameter is less than 20mm, in order to reach better combustion efficiency, preferably ensureing that particle diameter is less than 10mm.
As shown in Figure 1, pressure fan air-supply enters bellows 1 and enters combustion chamber participation fuel combustion through air distribution plate 2; Coal particle is trickled down in emulsion zone 3 by gravity after the fuel dog-house 4 being arranged in top, combustion chamber, and the mixing of emulsion zone 3 endoparticle is violent, can realize coal particle quick, efficiently catch fire and burn.Air distribution plate 2, in V-shape, can make the larger particles on air distribution plate 2 move in the middle part of trend air distribution plate 2, and the drainage conduit of larger particles successfully in the middle part of air distribution plate 2 affecting fluidization quality can be made like this to discharge.Air distribution plate 2 establishes air vent, and air vent can be arranged to the elongate holes as Fig. 2, also can be arranged to circular port as shown in Figure 3, and air vent is arranged in order to edge in the middle part of air distribution plate 2 and area reduces gradually.Vent area in the middle part of air distribution plate 2 is larger, progressively reduce to edge area, make the air quantity at middle part large like this, and edge air quantity is little, the air supply mode that this air quantity is uneven, impels the Inner eycle motion forming fluidized bed material and fuel particle in emulsion zone inside.
Emulsion zone 3 adopts inverted trapezoidal shape structure, the wind that air distribution plate 2 is sent here blows out bottom inverted trapezoidal shape, rise with fuel particle, inverted trapezoidal shape structure upper sectional area is greater than bottom area, the fuel particle of inverted trapezoidal shape structure upper, what self gravitation was greater than wind lifts power, and fall to the surrounding side of inverted trapezoidal shape structure, the region of particles fall is called recirculating zone.Traditional organic working medium boiler, takes away quickly in order to heat burning produced is more, arranges endothermic tube at the middle part of inverted trapezoidal shape structure.This endothermic tube is damaged through washing away for a long time of high velocity fuel particle, and organic working medium leakage wherein can bring very large potential safety hazard.
Pipe laying is arranged on the recirculating zone of emulsion zone 3, can effectively avoids above-mentioned potential safety hazard.Emulsion zone 3 left and right sides arranges that pipe laying to burn the partial heat discharged at emulsion zone in order to absorb fuel, and bed temperature is controlled within the scope of 850 ~ 1050 DEG C.Pipe laying is welded with wearing ring or abrasionproof fin, to alleviate fuel directly washing away and wearing and tearing pipe laying further, extends the service life of pipe laying.The coal particle cluster of grains that in emulsion zone 3, part is imperfect combustion upwards enters dilute-phase zone 5 with ash content with flue gas, dilute-phase zone 5 arranges square spiral coil wall, in order to absorb the radiations heat energy of high-temperature flue gas and convection heat thus organic working medium in heating heating surface.Top, combustion chamber dilute-phase zone front wall or left and right wall arrange fuel dog-house 4, and coal particle is passed into combustion chamber by fuel dog-house 4.
Combustion chamber upper outlet is provided with whirlpool separation burning device 6 and comprises water cooling tube, and water cooling tube lays refractory material, and whirlpool is separated burning device 6 bottom and is provided with feedback passage.Tangentially entered whirlpool by the media material that heat smoke is taken out of with larger coal particle and be separated burning device 6, under centrifugal force and Action of Gravity Field, larger coal particle is separated, catch, the feedback passage being separated the setting of burning device 6 bottom by whirlpool returns bottom, combustion chamber emulsion zone 3, achieve the circulating combustion of coal particle, whirlpool is separated air-flow is strong in burning device 6 turbulence can add mixing of strengthening coal particle and fuel gas and air, extend flue dust flow process simultaneously, improve because dynamics filed of industrial boiler is short and small, the problem that the efficiency of combustion that fuel does not have enough tail-off times to cause in combustion chamber is on the low side, thus obtain high efficiency of combustion.Whirlpool is separated burning device 6 outlet and is furnished with the heat that afterbody convection heating surface parts 7 can absorb burning generation further, thus reduces exhaust gas temperature, and improve the thermal efficiency of boiler, flue gas is finally discharged from exhaust pass 8.According to different user demand, afterbody convection heating surface parts 7 can select tube bank, economizer or air preheater one of them.
The concrete technology flow process of coal particle of the present invention burning: coal particle to be dropped into from the fuel dog-house 4 on top, combustion chamber by pipeline and forms the red-hot fluid bed of bed material by quartz sand or quartz sand and lime stone, and fluidized-bed temperature is at 850 ~ 1050 DEG C.Coal particle is ignition under the heating of red-hot fluidized bed material, and coarse granule shape coal disintegrates further and taken out of emulsion zone 3 for fine grained by heat smoke and enter combustion chamber, top dilute-phase zone 5 and burn away under fluidized state.Be provided with whirlpool at combustor exit and be separated burning device 6, be separated by the media bed material that heat smoke is taken out of with the separated device of larger coal particle, catch, the feedback passage being separated the setting of burning device 6 bottom by whirlpool returns bottom, combustion chamber emulsion zone 3, both the loss of media bed material had been decreased, achieve again the circulating combustion of coal particle, thus obtain high efficiency of combustion.In addition, the low-temperature burning process of 850 ~ 1050 DEG C, effectively controls the formation of thermal NO x.And be made up of quartz sand and lime stone due to media material, lime stone is at high temperature calcined and is generated CaO, CaO and SO
2reaction generates CaSO further
4, inhibit SO
2discharge, and the running temperature of burner is the optimum operation temperature of CaO desulfurization, effectively can reduce SO
2discharge.
The beneficial effect of the organic working medium boiler of the coal-fired fluidized bed burning of the present invention is embodied in:
(1) achieve the low-temperature burning of coal-fired organic working medium boiler, solve boiler and be easy to coking, fluctuation of service, problem that efficiency of combustion is low.
(2) combustor exit arranges whirlpool and is separated burning device, extend flue dust flow process, enhance the immixture of fuel particle group and fuel gas, achieve the circulating combustion of the group of the fuel particle after ignition and the after-flame of fuel gas, there is high efficiency of combustion, efficiency of combustion can reach about 98%, overcomes the defect that Industrial Boiler short and small space combustion efficiency is on the low side.This whirlpool is separated burning device and is surrounded by the extension of combustion chamber pipe, has structure simple, takes up room little, feature easy and simple to handle.
(3) adopt low temperature combustion mode (850 ~ 1050 DEG C), effectively control the formation of thermal NO x, and be made up of quartz sand and lime stone due to media material, lime stone at high temperature calcines generation CaO, CaO and SO
2reaction generates CaSO further
4, inhibit SO
2discharge, and the running temperature of this kind of combustion system is the optimum operation temperature of CaO desulfurization, effectively can reduce SO
2discharge.
(4) strong to coal quality applicability, meet the requirement of fuel quality fluctuation, can use cost be reduced.The banking fire of running can be realized, restart without the need to oil, reduce operating cost.
(5) dilute-phase zone water-cooling wall in combustion chamber adopts square spiral coil wall, adopts efficient thermal resistance material as heat insulation layer, good heat insulating, and boiler heat radiation is few, and efficiency is high.
(6) Load Regulation characteristic is good, can stable operation within the scope of 30% ~ 100% rated load.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (9)
1. the organic working medium boiler of coal-fired fluidized bed burning, comprise air-distribution device, combustion chamber, whirlpool separation burning device, afterbody convection heating surface parts, described combustion chamber is divided into emulsion zone and dilute-phase zone, it is characterized in that, described air-distribution device is provided with piece of cloth aerofoil, described air distribution plate is V-shape, and described air distribution plate establishes air vent, and described air vent is arranged in order to edge in the middle part of described air distribution plate and area reduces gradually; Described emulsion zone adopts inverted trapezoidal shape structure, and the recirculating zone of described emulsion zone arranges pipe laying; Described dilute-phase zone surrounding arranges water-cooling wall; Described dilute-phase zone top arranges described whirlpool and is separated burning device; Described whirlpool is separated burning device rear portion and arranges described afterbody convection heating surface parts; The coal particle that described organic working medium boiler use particle diameter is 0.001-20mm is as fuel.
2. the organic working medium boiler of coal-fired fluidized bed burning as claimed in claim 1, is characterized in that, described air vent is elongate holes or circular port.
3. the organic working medium boiler of coal-fired fluidized bed burning as claimed in claim 1, is characterized in that, described pipe laying is arranged on both sides or the surrounding of described recirculating zone.
4. the organic working medium boiler of coal-fired fluidized bed burning as claimed in claim 3, is characterized in that, described pipe laying outer surface is welded with wearing ring or abrasionproof fin.
5. the organic working medium boiler of coal-fired fluidized bed burning as claimed in claim 1, is characterized in that, described water-cooling wall is square spiral coil wall.
6. the organic working medium boiler of coal-fired fluidized bed burning as claimed in claim 1, is characterized in that, described whirlpool is separated burning device and comprises water cooling tube, and described water cooling tube lays refractory material, and whirlpool is separated burning device bottom and is provided with feedback passage.
7. the organic working medium boiler of coal-fired fluidized bed burning as claimed in claim 1, is characterized in that, described convection heating surface parts are tube bank, one of economizer or air preheater.
8. the organic working medium boiler of coal-fired fluidized bed burning as claimed in claim 1, is characterized in that, described coal particle average grain diameter is less than 10mm.
9. the organic working medium boiler of coal-fired fluidized bed burning as claimed in claim 1, is characterized in that, also comprises fuel dog-house, and described fuel dog-house is arranged on described dilute-phase zone front wall or left and right wall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310479681.XA CN103512029B (en) | 2013-10-14 | 2013-10-14 | The organic working medium boiler of coal-fired fluidized bed burning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310479681.XA CN103512029B (en) | 2013-10-14 | 2013-10-14 | The organic working medium boiler of coal-fired fluidized bed burning |
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| Publication Number | Publication Date |
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| CN103512029A CN103512029A (en) | 2014-01-15 |
| CN103512029B true CN103512029B (en) | 2016-02-10 |
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| CN201310479681.XA Expired - Fee Related CN103512029B (en) | 2013-10-14 | 2013-10-14 | The organic working medium boiler of coal-fired fluidized bed burning |
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| CN1200457A (en) * | 1997-05-23 | 1998-12-02 | 日本石油株式会社 | Multi-aperture gas distributor for fluidized bed reactor |
| CN1800708A (en) * | 2005-11-30 | 2006-07-12 | 刘杰 | Fluidized bed boiler for burning gangue |
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| CN101995016A (en) * | 2010-10-19 | 2011-03-30 | 重庆大学 | Circulating fluidized bed boiler device using low calorific value coal gangue for post ignition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1081315C (en) * | 1997-04-11 | 2002-03-20 | 清华大学 | fluidized bed boiler for burning multicomponent low heat value fuel and operating method thereof |
| US6021723A (en) * | 1997-06-04 | 2000-02-08 | John A. Vallomy | Hazardous waste treatment method and apparatus |
| CN2527860Y (en) * | 2002-03-18 | 2002-12-25 | 何相助 | High, low mixed flow speed circulating fluidized bed boiler |
| JP2006198530A (en) * | 2005-01-20 | 2006-08-03 | Port & Airport Research Institute | Method of separating oil from earth/sand for oil-contaminated earth/sand, and apparatus for separating oil from earth/sand for oil-contaminated earth/sand |
| CN101469865B (en) * | 2008-05-29 | 2010-12-08 | 周开根 | Plasma and calcium oxide cooperation-gasified rubbish biomass gasification method and equipment |
| CN202733916U (en) * | 2012-08-15 | 2013-02-13 | 常德市林宏锅炉有限公司 | Burning dregs fluidized bed boiler |
| CN102913899B (en) * | 2012-09-13 | 2015-12-02 | 浙江金锅锅炉有限公司 | Recirculating fluidized bed steam, organic heat carrier, hot-air Three-in-one |
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2013
- 2013-10-14 CN CN201310479681.XA patent/CN103512029B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3514974A1 (en) * | 1985-04-25 | 1986-10-30 | Rudolf Dr. 6800 Mannheim Wieser | Water tube steam generator |
| CN1200457A (en) * | 1997-05-23 | 1998-12-02 | 日本石油株式会社 | Multi-aperture gas distributor for fluidized bed reactor |
| CN1800708A (en) * | 2005-11-30 | 2006-07-12 | 刘杰 | Fluidized bed boiler for burning gangue |
| CN201521949U (en) * | 2009-10-28 | 2010-07-07 | 曹连新 | Low-rate top exhaust high-temperature cyclone separation circulating fluidized bed boiler |
| CN101995016A (en) * | 2010-10-19 | 2011-03-30 | 重庆大学 | Circulating fluidized bed boiler device using low calorific value coal gangue for post ignition |
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| CN103512029A (en) | 2014-01-15 |
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