CN102213413B - Coal-saving high-temperature boiling furnace - Google Patents

Coal-saving high-temperature boiling furnace Download PDF

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Publication number
CN102213413B
CN102213413B CN201110184678A CN201110184678A CN102213413B CN 102213413 B CN102213413 B CN 102213413B CN 201110184678 A CN201110184678 A CN 201110184678A CN 201110184678 A CN201110184678 A CN 201110184678A CN 102213413 B CN102213413 B CN 102213413B
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China
Prior art keywords
coal
boiling
combustion chamber
bed
furnace
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CN201110184678A
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Chinese (zh)
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CN102213413A (en
Inventor
缪建通
毛宇飞
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缪建通
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Priority to CN201110184678A priority Critical patent/CN102213413B/en
Publication of CN102213413A publication Critical patent/CN102213413A/en
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Publication of CN102213413B publication Critical patent/CN102213413B/en

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Abstract

The invention discloses a coal-saving high-temperature boiling furnace, which comprises a blower, a coal feeding system, a slag hole, a small nozzle button, a large nozzle button, a boiling combustion chamber, a high-temperature resistant material, a fire barrier, a settling chamber and a second combustion chamber, wherein an outlet of the coal feeding system is connected with the boiling combustion chamber; an external wall of the boiling combustion chamber is made of the high-temperature resistant material; the small nozzle button and the large nozzle button are arranged at the bottom of the boiling combustion chamber; the small nozzle button and the large nozzle button correspond to the outlet of the blower; the fire barrier is arranged between the boiling combustion chamber and the settling chamber; and the second combustion chamber is arranged on the fire barrier. The coal-saving high-temperature fluidized bed furnace has the advantages that: fire coal of 0 to 10 mm is mechanically fed to a distributor in the furnace; high-pressure air passes through the distributor to make coal particles in the furnace and furnace charges boil; and because the coal particles only account for 1 percent of the furnace charges, the contact area of the coal particles and air in a boiling combustion process is large, a speed of relative movement is high, a time interval between feed-in of raw coal and discharge-out of the raw coal is long, and some low-quality coals with a low heating value can be stably combusted by the second combustion chamber, so a quite high burn-off degree is achieved.

Description

Coal-saving high-boiling stove
Technical field
What the present invention relates to is a kind of coal-saving high-boiling stove, belongs to the drying materials production technical field.
Background technology
The typical structure of boiling furnace combustion chamber commonly used comprises cloth wind system, ebullated bed, charging and 4 parts of dreg removing system.1. cloth wind system.Combustion chamber bottom be an air distribution plate, direct perforate or adorn the blast cap of many band airing holes on the plate.The effect of air distribution plate is to carry the bed of material and make the air rate of climb even along cross-sectional distribution in the stove.2. ebullated bed.Place a certain amount of material (comprising solid fuel and a large amount of lime-ash or limestone particles) on the air distribution plate.During operation, when the air in the bed of material reached certain rate of climb, the bed material on the ebullated bed just changed fluidized state over to from inactive state, and this wind speed is called the critical boiling wind speed.In order to keep violent Boiling Combustion operating mode, the wind speed when fluidized bed furnace normally moves is bigger than critical boiling wind speed, makes the bed of material expand into certain altitude.Bed material boiling highly is about the twice of the static bed of material, is fluidized state at the fuel of this volume, so be called ebullated bed, granule is then taken out of outside the stove by air-flow.3. charging and dreg removing system.Through sending in the bed of material to feeding system, generally discharge from overfall by the cinder of after-flame from coal bunker for the fire coal of certain particle size scope.The firebreak of general fluidized bed furnace is to have refractory material to build by laying bricks or stones to form; Through negative pressure, get into expansion chamber to the high-temperature gas in the combustion chamber and a part of coal ash through the firebreak upper space, suck in the drying plant again; Through high-temperature gas and mixing of materials, dry the moisture of material.Shortcoming is: fine grained fuel is taken out of by flue gas easily in the ebullated bed, so the uncombusted loss is big, efficiency of combustion is low; When burning high ash content colm, a large amount of flying dusts are full of burner hearths, adversely affecting its combustion state.
Summary of the invention
What the present invention proposed is a kind of coal-saving high-boiling stove; Its purpose is intended to through improving the structure of fluidized bed furnace inner fire-baffling wall; Use high-temperature refractory to do the pipe network shape, through the high temperature of ignition, the high-temperature refractory of pipe network shape absorbs heat on the firebreak; Be stabilized in a condition of high temperature, form second combustion chamber.Do not reaching on the ebullated bed that ignition point fine grained fuel is taken out of by flue gas and the time through second combustion chamber; Because second combustion chamber is equivalent to the high temperate zone of another one; Make the fuel that does not reach ignition point in second combustion chamber, rekindle; Fuel combustion is obtained fully, and then improve the utilization rate of fuel.
Technical solution of the present invention: it is characterized in that comprising air blast, coal feeding system, slag notch, little blast cap, big blast cap, Boiling Combustion chamber, exotic material, firebreak, expansion chamber; Second combustion chamber; Wherein the outlet of coal feeding system inserts the Boiling Combustion chamber; The inwall of Boiling Combustion chamber is built into exotic material, and the bottom of Boiling Combustion chamber is provided with little blast cap, big blast cap, little blast cap, the big corresponding setting with the outlet of air blast of blast cap; Be firebreak between Boiling Combustion chamber and expansion chamber, second combustion chamber is located on the firebreak; With the conny of fragmentation, be blown into the shape that becomes to seethe with excitement in the boiling boiler burner hearth with high-pressure blast through air distribution plate and burn during use; Coal burns on boiling furnace charge bed: the coal of adaptation has incendivity bituminous coal, anthracite, brown coal and gangue; The mean temperature of the boiling bed of material is controlled at 850-1200 ℃, and the thickness 5-15CM of the bed of material is equivalent to a big accumulation of heat pond; Wherein fuel only accounts for 5-8%; The coal grain that constantly adds gets into the bed of material and the high tens times scorching hot particle of temperature mixes burning very soon, directly receives the heat of 40%-50% from bed, and described second combustion chamber adopts high-temperature refractory to make the pipe network shape; The heat of absorption point fire burns; And be stabilized in a condition of high temperature, and on ebullated bed, do not reach ignition point fine grained fuel and rekindle when being taken out of and get in second combustion chamber by flue gas, make fuel combustion abundant.
Advantage of the present invention: fluidized bed furnace is that the fire coal of 0-10mm is sent on the air distribution plate in the stove with machinery, and high-pressure blast makes coal grain and furnace charge boiling in the stove through air distribution plate.Because the coal grain only accounts for about 1% of furnace charge; Big and speed of related movement is big in the Boiling Combustion process with the air contact area; It is long to the time that discharges out of the furnace that raw coal is gone into stove; The ash-rich that some are difficult to burn in other type of furnace, low-calorie colm also can reach the very high degree that burns through the second combustion chamber smooth combustion.Specifically,
1) adaptability to fuel is strong, incendivity bituminous coal, anthracite, brown coal and gangue and various colm, gangue and coal slime etc.
2) efficiency of combustion is up to more than 95%.3) body of heater is heated evenly, long service life, and preparation of fuel is simple.
4) flexible operation, adjusting function is good, the stove quick heating.
5) the temperature even distribution heating is stable, can make dryer output improve 50-70%, economizes on coal 50% than other coal stove
More than, boiler slag carbon content is the good admixture of cement less than 1%.
6) labour intensity is low, and automaticity is high.
Description of drawings
Accompanying drawing 1 is coal-saving high-boiling furnace structure sketch map.
Accompanying drawing 2 is the figure that build by laying bricks or stones of second combustion chamber.
Among the figure 1 is air blast, the 2nd, coal feeding system, the 3rd, and slag notch, the 4th, little blast cap, the 5th, big blast cap, the 6th, Boiling Combustion chamber, the 7th, exotic material, the 8th, firebreak, the 9th, expansion chamber, 10 is second combustion chambers.
The specific embodiment
Contrast accompanying drawing 1; The structure of coal-saving high-boiling stove comprises air blast 1, coal feeding system 2, slag notch 3, little blast cap 4, big blast cap 5, Boiling Combustion chamber 6, exotic material 7, firebreak 8, expansion chamber 9; Second combustion chamber 10, wherein the outlet of coal feeding system 2 inserts Boiling Combustion chamber 6, and the outer wall of Boiling Combustion chamber 6 is built into exotic material 7; The bottom of Boiling Combustion chamber 6 is provided with little blast cap 4, big blast cap 5; Its medium and small blast cap 4, the big corresponding setting with the outlet of air blast 1 of blast cap 5,9 of Boiling Combustion chamber 6 and expansion chambers are that firebreak 8, the second combustion chambers 10 are located on the firebreak 8.
During work, the conny with being crushed to certain particle size rises with wind, on the setting height of boiling boiler burner hearth, becomes the burning of boiling shape; The burning of coal in fluidized bed furnace neither on fire grate, burn, neither be suspended in space combustion as coal-powder boiler, but on boiling furnace charge bed, carry out.The coal that adapts to has incendivity bituminous coal, anthracite, brown coal and gangue.The mean temperature of the boiling bed of material is generally at 850-1200 ℃, and the bed of material is very thick, is equivalent to a big accumulation of heat pond; Wherein fuel only accounts for about 5%; Initiate coal grain just mixes with the high tens times scorching hot particle of temperature after getting into the bed of material, so can burn very soon, replaces so can use coal gangue subculture.Production practices show, utilize contain ash content up to 70%, the caloric value gangue of 7.54MJ/kg only, operation is normal.The heat of 40%-50% can directly receive from bed.
Second combustion chamber uses high-temperature refractory to make the pipe network shape, and through the high temperature of ignition, the high-temperature refractory of second combustion chamber absorbs heat, is stabilized in a condition of high temperature.Do not reach on ebullated bed that ignition point fine grained fuel is taken out of by flue gas and during through second combustion chamber; Because second combustion chamber is equivalent to the high temperate zone of another one; The fine grained fuel that does not reach ignition point rekindles in second combustion chamber; Can make fuel combustion abundant, and then improve the utilization rate of fuel.
The high-boiling stove can replace fat coal with colm; Produce high-temperature flue gas, the main thermal source of drying material, its combustion system is between layer combustion and suspension combustion; Dry various materials with the mode of direct heating or indirect, be used for departments such as building materials chemical industry metallurgy and light industry.

Claims (1)

1. coal-saving high-boiling stove; It is characterized in that comprising air blast, coal feeding system, slag notch, little blast cap, big blast cap, Boiling Combustion chamber, exotic material, firebreak, expansion chamber; Second combustion chamber, wherein the outlet of coal feeding system inserts the Boiling Combustion chamber, and the inwall of Boiling Combustion chamber is built into exotic material; The bottom of Boiling Combustion chamber is provided with little blast cap, big blast cap; Little blast cap, the big corresponding setting with the outlet of air blast of blast cap are firebreaks between Boiling Combustion chamber and expansion chamber, and second combustion chamber is located on the firebreak; With the conny of fragmentation, get into burner hearth during use, be blown into the shape that becomes to seethe with excitement in the boiling boiler burner hearth with high-pressure blast through air distribution plate and burn through coal feeding system; Coal burns on boiling furnace charge bed: the coal of adaptation has incendivity bituminous coal, anthracite, brown coal and gangue; The mean temperature of the boiling bed of material is controlled at 850-1200 ℃, the thickness 5-15CM of the boiling bed of material, and the boiling bed of material is equivalent to an accumulation of heat pond; Wherein fuel only accounts for 5-8%; The coal grain that constantly adds gets into the boiling bed of material and the high tens times scorching hot particle mixed combustion of boiling material layer temperature, and the coal that constantly adds directly receives the heat of 40%-50% from bed, and described second combustion chamber adopts high-temperature refractory to make the pipe network shape; The heat of absorption point fire burns; And being stabilized in a condition of high temperature, the fine particulate coal fuel that on ebullated bed, does not reach ignition point is taken out of and is got in second combustion chamber by flue gas and rekindles, and makes fuel combustion abundant.
CN201110184678A 2011-07-04 2011-07-04 Coal-saving high-temperature boiling furnace CN102213413B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN102213413B true CN102213413B (en) 2012-09-05

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103090372A (en) * 2011-10-28 2013-05-08 张璟 Special boiling burner for forging
CN102600949B (en) * 2012-03-05 2013-11-27 马鞍山市中天新型建材有限公司 Building material added composite material flow-line production equipment connected with coastwise wharf of Yangtze River
CN102809148B (en) * 2012-08-23 2014-12-10 郑州市鼎力干燥设备有限公司 Re-combustion hot gas generating furnace
CN105157043A (en) * 2015-10-09 2015-12-16 杨刚 Special boiling furnace for strong-oxygen combustion sludge
CN105910394A (en) * 2016-04-25 2016-08-31 江苏齐光玻璃科技有限公司 Drying device
CN106090896A (en) * 2016-06-24 2016-11-09 江苏尚昆生物设备有限公司 A kind of drying unit
CN106288659A (en) * 2016-08-26 2017-01-04 佛山市新太重工机械设备有限公司 A kind of hot blast stove system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2325645Y (en) * 1998-03-05 1999-06-23 北京通用能源动力公司 Circulation fluidised bed boiler being transformed from right rotation chain furnace
CN2514228Y (en) * 2001-12-06 2002-10-02 北京中科通用能源环保有限责任公司 Section assembled circulation fluidized bed boiler
CN2625732Y (en) * 2003-05-28 2004-07-14 黄石市建材节能设备总厂 Low discharging and collecting dust type combustion furnace
WO2006114654A2 (en) * 2005-04-25 2006-11-02 TÓTH, Béla Method for the automatic combustion of solid granular fuels, particularly pellets, and burner for the boiler
CN201335374Y (en) * 2008-12-03 2009-10-28 潘志明 Water-cooling vortex internal separation circulating fluidized bed boiler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2325645Y (en) * 1998-03-05 1999-06-23 北京通用能源动力公司 Circulation fluidised bed boiler being transformed from right rotation chain furnace
CN2514228Y (en) * 2001-12-06 2002-10-02 北京中科通用能源环保有限责任公司 Section assembled circulation fluidized bed boiler
CN2625732Y (en) * 2003-05-28 2004-07-14 黄石市建材节能设备总厂 Low discharging and collecting dust type combustion furnace
WO2006114654A2 (en) * 2005-04-25 2006-11-02 TÓTH, Béla Method for the automatic combustion of solid granular fuels, particularly pellets, and burner for the boiler
CN201335374Y (en) * 2008-12-03 2009-10-28 潘志明 Water-cooling vortex internal separation circulating fluidized bed boiler

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