CN104235837B - Dual-cyclone mixed oxygen enrichment coal injection pipe for cement clinker rotary kiln - Google Patents
Dual-cyclone mixed oxygen enrichment coal injection pipe for cement clinker rotary kiln Download PDFInfo
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- CN104235837B CN104235837B CN201410491655.3A CN201410491655A CN104235837B CN 104235837 B CN104235837 B CN 104235837B CN 201410491655 A CN201410491655 A CN 201410491655A CN 104235837 B CN104235837 B CN 104235837B
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a dual-cyclone mixed oxygen enrichment coal injection pipe for a cement clinker rotary kiln. The dual-cyclone mixed oxygen enrichment coal injection pipe comprises a central barrel and four column cones, which are sequentially installed from inside to outside in a sleeving manner and share the same axis, passages formed by encircling the central barrel and the four column cones from inside to outside are sequentially an ignition gun passage (1), a central air passage (2), a coal air passage (4), an inner air passage (5) and an axial flow air passage (6), one column cone is additionally arranged in the central air passage (2), an annular passage between the coal air passage (4) and the central air passage (2) is an oxygen enrichment air passage (3), the width of the oxygen enrichment air passage (3) is not more than half of the width of the inner air passage (5), and a cyclone (8) which is equal to a gradient angle of a cyclone (7) of the inner air passage (5) is arranged in a conical passage of the oxygen enrichment air passage (3). The dual-cyclone mixed oxygen enrichment coal injection pipe can be applied to the cement clinker rotary kiln. According to the dual-cyclone mixed oxygen enrichment coal injection pipe, the kiln temperature can be increased by 100 to 150 DEG C, the single consumption of the clinker is reduced by 5 to 10 percent, the coal economizing rate is 5 to 10 percent, the productivity of the rotary kiln can be improved by 10 to 15 percent, and the poor-quality low-heat-value coal can be burned in a mixing manner.
Description
Technical field invention is related to one kind and has " the double-cyclone mixing of oxygen-enriched air local combustion supporting, coal wind interior outside, greatly speed
The clinker rotary kiln of the technical characteristics such as difference high thrust jet " is with double-cyclone mixed type oxygen-enriched coal spray pipe it is adaptable to building material industry
Cement and refractory material rotary kiln, metallurgy industry rotary kiln, chemical industry rotary kiln and lime industry rotary kiln, multichannel combustion gasification reacts
Device or nozzle process the devices such as powder and use.
The current manufacture of cement of background technology faces the severe situations such as production capacity surplus, coal electric energy rise in price.Applicating energy-saving
New technique such as oxygen-enriched combusting and swirl flow combustion, play existing rotary kiln (also known as rotary kiln) productive potentialities, are that product city is improved by enterprise
The key of field competitiveness.Coal injection pipe is related to system throughput, heat consumption and environmental protection problem, rotary kiln stability, kliner coating and kiln lining
Build service life.Coal injection pipe coal consumption accounts for production line comprehensive energy consumption ratio up to 30%～50%.Practice have shown that: existing coal injection pipe is big
Majority and is difficult to solve coal dust and oxygen molecule uniform mixed problem during big yield based on normal oxygen air burning, leads to kiln temperature inclined
Low, unit grog coal consumption index is higher, and production efficiency is low.
The side that oxygen-enriched air pipeline and dore furnace and rotary kiln coal injection pipe primary air piping are newly set by patent cn201458983 u
Pipe connects, and oxygen-enriched air is mixed in coal injection pipe First air.Patent cn203024574 u oxygen lance passes through coal injection pipe central canal high
Speed is blown into flame kernel.Patent cn202177298 u sets up calment burner above grog grid cooler, preheats oxygen-enriched sky
Gas is mixed in secondary wind and is inhaled in kiln.This patent makes technique complicate.Patent cn102705837 a is direct by oxygen-enriched air
It is added to in airduct, by rotary kiln and dore furnace blower fan sucks so that coal powder lance wind for patent cn102913939 a oxygen-enriched air
All replace with oxygen-enriched air.Patent cn103672886 a sets up oxygen-enriched air spray gun, spray gun outside coal injection pipe axle stream wind passage
Spout is arranged on the circular arc of axle stream wind nozzle outer circumference lower central angle≤270 °.This patent enhances flame-material radiation
Heat transfer, but complex structure and be difficult to accurately manufacture.Patent cn102434890a separates secondary membrane the higher degree infiltration obtaining
Oxygen rich air is sent into coal injection pipe central air hose, is detained oxygen rich air compared with low-purity and is sent into coal injection pipe axle stream airduct.Oxygen-enriched air is simply
Only it may appear that localized hyperthermia, no in injection coal injection pipe centre wind or First airxDischarge increase and kiln temperature skewness etc. are asked
Topic.Oxygen-enriched air simply injects coal injection pipe secondary wind or simple replacement all uses wind, and oxygen-enriched air utilization ratio is not high, can go out
Existing oxygen-enriched air wastes to be increased, the problems such as day-to-day operation expense increases.Patent cn103496863 a discloses a kind of four-way coal powder injection
Manage oxygen-enriched method for calcinating, be not related to new equipment.
Development structure is simple, air/oxygen-enriched air is mixed homogeneously with fine coal, play rotary kiln produces potential and improves sintering effect
The oxygen-enriched coal spray pipe of rate, has good economy, energy-conserving and environment-protective and social benefit.
Content of the invention is for coal dust and oxygen molecule when overcoming existing multi-passage coal injection Guan Yin to use normal oxygen air, big yield
, the shortcomings of kiln temperature is low, coal consumption is higher and production efficiency is low in uneven mixing reason, and Invention Announce one kind has " rich
The technical characteristics such as the mixing of outside double-cyclone, high speed difference high thrust jet in oxygen air local combustion supporting, coal wind ", meet and excavate rotary kiln
Produce the clinker rotary kiln double-cyclone mixed type oxygen-enriched coal spray pipe that potential needs, oxygen-enriched air utilization rate is high.
Clinker rotary kiln double-cyclone mixed type oxygen-enriched coal spray pipe, including from inside to outside order suit and coaxial line one
Individual center drum and four post cone cylinder, each post cone cylinder includes a frustum of a cone cylinder and a cylinder, cylinder exit end face and circle
Frustum drum entrance point little bottom surface full weld links, and the taper such as four frustum of a cone cylinders is contour and little bottom surface is coplanar, the center drum port of export
Face and the big bottom surface of four frustum of a cone cylinders are coplanar, and the passage that center drum and four post cone cylinder surround from inside to outside is followed successively by burning torch
Passage, center wind duct, coal wind duct, endogenous wind passage and axle stream wind passage, arrangement cyclone in the conial channel of endogenous wind passage
Endogenous wind eddy flow is made to spray at a high speed, the Circular Plate that center wind duct exit end face full weld connects one piece of uniform aperture makes centre wind with crowd
How little mode of jet sprays parallel to center wind duct axis, from unlike traditional four-way coal injection pipe in center wind duct
Set up a cylinder exit end face full weld and link the little bottom surface of frustum of a cone cylinder entrance point, and the post cone with center wind duct coaxial line
Cylinder, the taper such as the frustum of a cone cylinder of the post cone cylinder set up and the frustum of a cone cylinder of coal wind duct inner tube is contour and big bottom surface is coplanar, coal wind
Circular passage between passage and center wind duct is oxygen-enriched air passage, and oxygen-enriched air channel width is less than endogenous wind channel width
The half of degree, in the conial channel of oxygen-enriched air passage, arrangement cyclone makes oxygen-enriched air high-speed rotational spray, and oxygen-enriched air leads to
The flow deflector gradual change angle of road cyclone and endogenous wind channel rotational-flow device is equal.
Building material industry novel dry-method cement clinker sintering with fine coal as fuel, refractory material are dried, calcination of lime, metallurgical
Industry is dried, oxidizing roasting, and chemical industry oxidizing roasting and environmental protection industry (epi) burn and use rotary kiln device, and multichannel combustion gasification is anti-
Answer device or nozzle to process powder place, the present invention can be used.
Invention economy, energy-conserving and environment-protective and social benefit are notable.Commercial Application shows: in kiln ignition temperature improve 100 DEG C～
150 DEG C, unit grog product coal consumption decline 5%～10%, coal saving rate 5%～10%, the pulverized coal friring time 10%～15%, rotation
Kiln production capacity improves 10%～15%, combustion air volume and blast, flue gas flow, contains co, noxAnd temperature all has reduction or reduces, with
Flue gas is taken away thermal loss and is reduced, and can substitute the former high-quality anthracite using with the poor quality low calorific value coal such as bituminous coal, brown coal.
Brief description
Fig. 1 is clinker rotary kiln double-cyclone mixed type oxygen-enriched coal spray pipe vertical cross-section diagram, and Fig. 2 is clinker rotary kiln
With double-cyclone mixed type oxygen-enriched coal spray pipe exit end face figure.1 is burning torch passage, wind passage centered on 2, and 3 lead to for oxygen-enriched air
Road, 4 is coal wind duct, and 5 is endogenous wind passage, and 6 is axle stream wind passage, and 7 is cyclone, and 8 is cyclone.
Specific embodiment:
Below in conjunction with the accompanying drawings invention is further described.
As shown in Figures 1 and 2, clinker rotary kiln double-cyclone mixed type oxygen-enriched coal spray pipe, including from inside to outside
Order suit and a center drum of coaxial line and four post cone cylinder.Each post cone cylinder includes a frustum of a cone cylinder and a circle
Cylinder, cylinder exit end face and frustum of a cone cylinder entrance point little bottom surface full weld link.The tapers such as four frustum of a cone cylinders are contour, and little bottom surface
Coplanar, center drum exit end face and the big bottom surface of four frustum of a cone cylinders coplanar.Center drum length is much larger than four frustum of a cone cylinders
Highly.The passage that center drum and four post cone cylinder surround from inside to outside is followed successively by burning torch passage 1, center wind duct 2, coal wind
Passage 4, endogenous wind passage 5 and axle stream wind passage 6.Burning torch passes through centered cylinder internal channel along centered cylinder axis.Centre wind leads to
The Circular Plate that road 2 exit end face full weld connects one piece of uniform aperture makes centre wind lead to parallel to centre wind with numerous little mode of jet
Road 2 axis sprays.In the conial channel of endogenous wind passage 5, arrangement cyclone 7 makes endogenous wind eddy flow spray at a high speed.With the spray of traditional four-way
Set up a cylinder exit end face full weld unlike coal tubular construction and link frustum of a cone cylinder entrance point handle in center wind duct 2
Face, and the post cone cylinder with center wind duct 2 coaxial line.The frustum of a cone cylinder of newly-increased post cone cylinder and the frustum of a cone of coal wind duct 4 inner tube
The tapers such as cylinder are contour and big bottom surface is coplanar.Circular passage between coal wind duct 4 inner tube and newly-increased post cone cylinder leads to for oxygen-enriched air
Road 3, wind passage 2 centered on the circular passage between newly-increased post cone cylinder and center drum.Coal wind duct 4 and center wind duct 2 it
Between circular passage be oxygen-enriched air passage 3, oxygen-enriched air passage 3 width be less than endogenous wind passage 5 width half.Oxygen-enriched sky
In the conial channel of gas passage 3, arrangement cyclone 8 makes oxygen-enriched air high-speed rotational spray.Oxygen-enriched air passage 3 cyclone 8 and interior
The flow deflector gradual change angle of wind passage 5 cyclone 7 is equal, endogenous wind swirl velocity size and oxygen-enriched when leaving frustum of a cone cylinder exit end face
Air swirl velocity magnitude is equal.
The oxygen-enriched coal spray pipe of invention indication, including a center drum of order suit and coaxial line from inside to outside and five
Post cone cylinder, respectively burning torch passage 1 pipe, center wind duct 2 outer tube, oxygen-enriched air passage 3 outer tube, coal wind duct 4 outer tube,
Endogenous wind passage 5 outer tube and axle stream wind passage 6 outer tube.Each post cone cylinder includes a frustum of a cone cylinder and a cylinder, and cylinder exports
End face and frustum of a cone cylinder entrance point little bottom surface full weld connect, and pipe external diameter and frustum of a cone cylinder little bottom surface external diameter are equal, five post cones
Cylinder etc. taper, contour, gradually expand to direction vertical section diameter in kiln, little bottom surface on same perpendicular, big bottom surface exists
On same perpendicular.Center drum length and five post cone cylinder length are roughly equal.Burning torch passes through along center drum axis
Burning torch passage 1 is arranged.Center wind duct 2 inner tube is burning torch passage 1 outer tube, and centered on oxygen-enriched air passage 3 inner tube, wind leads to
Road 2 outer tube, coal wind duct 4 inner tube is oxygen-enriched air passage 3 outer tube, and endogenous wind passage 5 inner tube is coal wind duct 4 outer tube, axle stream wind
Passage 6 inner tube is endogenous wind passage 5 outer tube.Wind centered on circular passage between burning torch passage 1 pipe and center wind duct 2 outer tube
Passage 2, between center wind duct 2 outer tube and oxygen-enriched air passage 3 outer tube, circular passage is oxygen-enriched air passage 3, oxygen-enriched air
Between passage 3 outer tube and coal wind duct 4 outer tube, circular passage is coal wind duct 4, coal wind duct 4 outer tube and endogenous wind passage 5 outer tube
Between circular passage be endogenous wind passage 5, between endogenous wind passage 5 outer tube and axle stream wind passage 6 outer tube circular passage be axle stream wind lead to
Road 6.Oxygen-enriched air passage 3 width is less than the half of endogenous wind passage 5 width.Arrangement eddy flow in the conial channel of endogenous wind passage 5
Device 7 makes endogenous wind high-speed rotational spray, and in the conial channel of oxygen-enriched air passage 3, arrangement cyclone 8 makes oxygen-enriched air high-speed rotational
Spray, cyclone 8 and cyclone 7 flow deflector gradual change angle equal so that oxygen-enriched air jet swirl velocity size and endogenous wind jet
Swirl velocity is equal in magnitude, and direction is identical.During the Circular Plate of center wind duct 2 exit end face full weld one piece of uniform aperture of connection makes
Heart-wind syndrome is sprayed along parallel to center wind duct 2 axis direction in numerous the little flow jet modes, and coal wind is flowed out with " v " shape jet
Coal wind duct 4, axle stream wind sprays at a high speed axle stream wind passage 6 with " v " shape jet.Centre wind, coal wind and axle stream wind are direct current
Wind, oxygen-enriched air and endogenous wind are Whirl deposite tank.
Flow out in " v " shape jet from coal wind duct 4 after coal dust and compressed air mixing.Into kiln along parallel to center circle
The frustum of a cone cylinder big bottom surface full weld of tube axis direction axle stream wind passage 6 outer tube couples a bit of cylinder, and axle stream wind leaves the frustum of a cone
Substitute " v " shape high-speed jet with horizontal high-speed jet behind the big bottom surface of cylinder to spray, so both can reduce high speed shaft stream wind too early
Ground washes away rotary kiln liner, can elongate flame along center circle tube axis direction again, meet the heating needs of rotary kiln overlength flame.
In the oxygen-enriched coal spray pipe entrance point of invention indication, centre wind and oxygen-enriched air, oxygen-enriched air and coal wind, coal wind and interior
Wind, endogenous wind and axle stream wind are not all ganged up.
Coal dust is carried by air-flow and flows outwardly by certain diffusion angle from coal wind duct 4, in endogenous wind passage 5 flows out
Wind high-speed rotational sprays, and passes to the at a relatively high momentum of coal wind and the moment of momentum, be threadingly advanced at high speed and continue footpath outside coal wind
To diffusion, meet with high speed shaft stream wind facies.The oxygen-enriched air high-speed rotational flowing out from oxygen-enriched air passage 3 sprays, inside coal wind
Pass to the at a relatively high momentum of coal wind and the moment of momentum, be threadingly advanced at high speed and continue radial diffusion.Oxygen-enriched air is inside coal wind
Eddy flow spreads, and on the one hand promotes to hold up coal wind, stops coal wind direction axis direction from being assembled, and oxygen-enriched air and coal wind are full and uniform mixed
Close, strengthen the utilization rate of oxygen-enriched air, on the other hand increase near zone negative pressure in invention indication oxygen-enriched coal spray pipe port of export kiln,
Increase high temperature gases recirculating intensity, strengthening high temperature gases recirculating steady flame effect.The insertion of axle stream wind, further enhancing coal wind
Mixing, and the degree of divergence of adjustable flame, length and thickness.Center wind action be promote core a small amount of coal dust and
The burning of co is more abundant, and plays the effect of current stabilization.Endogenous wind eddy flow can roll up suction coal wind so that coal wind and endogenous wind are sufficiently mixed,
Coal wind and the full and uniform mixing of axle stream wind, stop axle stream wind from prematurely being assembled to axle stream wind axis direction, are allowed to adapt to long flame
The needs of heat transfer.The high speed being had due to Whirl deposite tank and axle stream wind, burning is very fast and completely.
Centre wind, endogenous wind, coal wind and axle stream wind are all the normal oxygen air of oxygen-containing volumetric concentration 21%.Oxygen-enriched air contains oxysome
Long-pending concentration 21%～40%, can be to be obtained using embrane method method for producing oxygen through and the oxygen-enriched air through compressor boosting, can be profit
The oxygen being obtained with pressure-variable adsorption/cryogenic method and normal oxygen air are mixed to get and the oxygen-enriched air through compressor boosting.Air
Coefficient of excess 1.15～1.25.Coal wind velocity 22m/s～35m/s, axle stream wind velocity 85m/s～220m/s, endogenous wind and oxygen-enriched sky
Gas speed 85m/s～220m/s.Center air quantity is the 0.6%～0.8% of the whole air quantity of oxygen-enriched coal spray pipe, and coal air quantity is oxygen-enriched spray
The 6%～15% of the whole air quantity of coal pipe, axle stream air quantity: interior air quantity: oxygen-enriched air amount is 60%: 25%: 15%.Cyclone 7 He
The flow deflector gradual change angle of cyclone 8 is identical, within 17 °～50 ° scopes.
Oxygen-enriched coal spray pipe gradient is identical with rotary kiln gradient, fixes in kiln hood end support or suspension bracket, and can be along oxygen-enriched
Coal injection pipe axis moves forward and backward.Igniting terminates a segment distance or entirety after rear burning torch draws and pulls out to avoid scaling loss, and coal injection pipe
Center pipe passageway f tail end flange seal.Oxygen-enriched coal spray pipe axle stream wind passage 6 outer tube uses high-strength fireproof pour material, and
Reserve horizontal longitudinal expansion joint.
Inventive structure feature, technical characteristic and the technique effect bringing are described in detail as follows:
Invention has " sets up oxygen-enriched air passage 3, oxygen-enriched air is in coal wind between center wind duct 2 and coal wind duct 4
The architectural feature of side high-speed rotational diffusion ".For traditional four-way coal injection pipe, center wind duct 2 outer tube is in coal wind duct 4
Pipe, is the centre wind of numerous little direct jet forms inside coal wind.The oxygen-enriched coal spray pipe of invention indication is in center wind duct 2 outer tube
Oxygen-enriched air passage 3 outer tube of one and center wind duct 2 outer coaxial tube line, oxygen-enriched sky is set up and coal wind duct 4 inner tube between
Gas passage 3 outer tube includes a cylinder and a frustum of a cone cylinder, outside outside diameter of cylinder and the newly-increased little bottom surface of frustum of a cone cylinder entrance point
Footpath is equal, and cylinder exit end face and newly-increased frustum of a cone cylinder little bottom surface full weld connect, outside newly-increased frustum of a cone cylinder and coal wind duct 4
The tapers such as the frustum of a cone cylinder of pipe, contour, newly-increased frustum of a cone cylinder gradually expands to direction vertical section diameter in kiln.Oxygen-enriched air
Passage 3 width is less than the half of endogenous wind passage 5 width, arrangement and cyclone 7 water conservancy diversion in the conial channel of oxygen-enriched air passage 3
Piece gradual change angle identical cyclone 8 so that oxygen-enriched air with high-speed rotational form inside coal wind along oxygen-enriched air passage 3 axis
Direction is spread to kiln internal coiling.Oxygen-enriched air swirl velocity size is equal in magnitude with endogenous wind swirl velocity, direction is identical.Except igniting
Outside rifle passage 1, traditional four-way coal injection pipe includes center wind duct 2, coal wind duct 4, endogenous wind passage 5 and axle stream wind passage 6, is
Five post cone cylinder suit of coaxial line, four-way structures, and the oxygen-enriched coal spray pipe of invention indication includes center wind duct 2, oxygen-enriched
Air duct 3, coal wind duct 4, endogenous wind passage 5 and axle stream wind passage 6, are six post cone cylinder suits, the Five-channel knot of coaxial line
Structure.
Three technical characteristics that said structure feature leads to are:
One is uniform local oxygen-enriched combusting in tissue kiln.Normal oxygen air-breathing effective with traditional multi-passage coal injection is compared, and uses
Oxygenized air combustion supporting, can accelerate combustion velocity, and then increases rotary kiln production efficiency and excavate rotary kiln production potential.Invention
Outside double-cyclone hybrid mode in the coal wind of oxygen-enriched coal spray pipe design of indication, it is to avoid simply oxygen-enriched air is injected center
Higher, the oxygen-enriched utilization rate of oxygen-enriched air local concentration that the methods such as wind, coal wind, endogenous wind or axle stream wind exist is not high, localized hyperthermia
The problems such as.It is mixed into coal wind by oxygen-enriched air eddy flow is radially uniform, coal wind-oxygen-enriched air mixture is radially uniform to be mixed into axle stream wind
, so that the radially uniform diffusion of oxygen-enriched air, on the one hand the head-on radiation heat transfer between strengthening flame and material, another for approach
Aspect strengthens the indirect directed radiation heat transfer between flame-kiln liner.Compare with patent cn103672886a, increased strengthening fire
Indirect directed radiation heat transfer effect between flame-kiln liner.
Two is by the mixing of outside double-cyclone, strengthening oxygen-enriched air and coal dust radial diffusion active force in coal wind.Tradition four
The simply setting endogenous wind eddy flow mixing outside coal wind of passage coal powder lance, the mixing of strengthening coal wind and endogenous wind, coal wind and axle stream wind
Immixture.Except traditional four-way coal powder lance have " endogenous wind eddy flow can roll up suction coal wind, make coal wind and endogenous wind radially uniform
Outside mixing, coal wind and the radially uniform mixing of axle stream wind " technical characteristic, the oxygen-enriched coal spray pipe of invention indication is arranged also inside coal wind
Oxygen-enriched air eddy flow mixes, the mixing of strengthening oxygen-enriched air-coal wind, mixing, coal wind and the axle of strengthening coal wind and endogenous wind further
The immixture of stream wind, that is, further enhancing coal wind radial direction and be mixed into the effect of axle stream wind.Oxygen-enriched air revolves at a high speed inside coal wind
Stream diffusion, on the one hand holds up coal wind, coal wind direction coal wind duct 4 axis direction can be stoped prematurely to assemble, promote oxygen-enriched air
The radially uniform mixing with coal wind, strengthens oxygen-enriched air effective rate of utilization, on the other hand increases oxygen-enriched coal spray pipe port of export kiln included
Near field negative pressure, increases high temperature gases recirculating intensity, strengthening high temperature gases recirculating steady flame effect.Due to oxygen-enriched air, endogenous wind and
The high swirl velocity that axle stream wind has, burning is very fast and complete.
Three is high speed difference high thrust jet flow strengthening coal wind and axle stream wind immixture.Oxygen-enriched coal spray pipe is using straight at a high speed
Form rotary kiln so that the air-flow of its early stage is handed between stream axle stream wind, high-speed rotational endogenous wind and oxygen-enriched air, low speed coal wind
Change and significantly improved with mixed performance, thus promoting coal dust firing and forming stable combustion flame.Axle stream wind is at a high speed
Direct current wind, has very strong penetrance and volume smoking gas ability, the flue gas inhaled by volume in a large number directly and endogenous wind-coal wind mixture and
Coal dust mixed combustion in oxygen-enriched air-coal wind mixture.Coal wind is low-speed DC wind, coal dust high-pressure delivery, and air quantity is less, dense
Degree is high, has good flammability.Endogenous wind and oxygen-enriched air are high-speed rotational wind, and intensity is big, mixing is strong, momentum and heat
Transmission is rapidly it is ensured that coal dust is contacted with oxygen in very short time and in the distance, and forms local return area, and high-temperature flue gas are returned
Flow to flame section start, formed and stablize flame, and so that the coal powder ignition time is shortened.Has combustion product in surfaces of carbon particles
The adhesive membrane being formed, this film thickness raises with temperature and increases, and hinders gas diffusion and the carrying out of combustion reaction, will
Carbon grain surface thin film is removed as early as possible as early as possible, thus coal dust firing can be strengthened.Invention indication oxygen-enriched coal spray pipe setting oxygen-enriched air with
Coal wind velocity is poor, endogenous wind is poor with coal wind velocity, axle stream wind is poor with oxygen-enriched air-coal wind-endogenous wind mixing wind velocity, greatly increases
Axial direction scraping power suffered by coal dust particle and radial shear power are so that in coal dust particle unreacted internal unsalted surface is earlier more
It is exposed to soon in axle stream wind, realize more thorough combustion reaction.
What said structure feature and technical characteristic brought has the technical effect that in kiln, ignition temperature improves, the pulverized coal friring time
Shorten, rotary kiln unit-hour output and clinker quality improve, and production capacity and production efficiency all improve.Combustion air volume and blast, flue gas flow,
Temperature and pollutant emission all have reduction or reduce, and take away thermal loss with flue gas and reduce, grog unit consumption declines.Ature of coal is fitted
Answering property strengthens, can be with burning low grade coal, and clinkersintering economy strengthens.Enhance coal injection pipe controlled flame shape section.When coal wind one
Regularly, endogenous wind and oxygen-enriched air determine flame profile, and axle stream wind determines that flame length, endogenous wind and oxygen-enriched air determine that flame is thick
Carefully.Avoid during execute-in-place individually adjusting a kind of wind it is ensured that coal dust stably burns and ideal flame profile.
Building material industry novel dry-method cement clinker sintering with fine coal as fuel, refractory material are dried, calcination of lime, metallurgical
Industry is dried, oxidizing roasting, and chemical industry oxidizing roasting and environmental protection industry (epi) burn and use rotary kiln device, and multichannel combustion gasification is anti-
Device or nozzle is answered to process powder place, it is possible to use the present invention.
Commercial Application shows: in kiln ignition temperature improve 100 DEG C～150 DEG C, unit grog product coal consumption decline 5%～
10%, economize on coal 5%～10%, the pulverized coal friring time 10%～15%, rotary kiln production capacity improves 10%～15%, combustion air volume and wind
Pressure, flue gas flow, contain co, noxAnd temperature all has reduction or reduces, take away thermal loss with flue gas and reduce, bituminous coal, brown coal can be used
Substitute the former high-quality anthracite using Deng low calorific value coal inferior.
Claims (1)
1. clinker rotary kiln double-cyclone mixed type oxygen-enriched coal spray pipe, including order suit from inside to outside and one of coaxial line
Center drum and four post cone cylinder, each post cone cylinder includes a frustum of a cone cylinder and a cylinder, cylinder exit end face and circular cone
Platform cylinder entrance point little bottom surface full weld links, and the taper such as four frustum of a cone cylinders is contour and little bottom surface is coplanar, center drum exit end face
Coplanar with the big bottom surface of four frustum of a cone cylinders, the passage that center drum and four post cone cylinder surround from inside to outside is followed successively by burning torch and leads to
Road (1), center wind duct (2), coal wind duct (4), endogenous wind passage (5) and axle stream wind passage (6), the taper of endogenous wind passage (5)
In passage, arrangement cyclone (7) makes endogenous wind eddy flow spray at a high speed, and center wind duct (2) exit end face full weld connects one piece uniformly little
The Circular Plate in hole make centre wind with numerous little mode of jet parallel to center wind duct (2) axis spray it is characterised in that: in
Heart-wind syndrome passage (2) is inner to set up a cylinder exit end face full weld link little bottom surface of frustum of a cone cylinder entrance point, and and center wind duct
(2) the post cone cylinder of coaxial line, the taper such as frustum of a cone cylinder of the frustum of a cone cylinder of the post cone cylinder set up and coal wind duct (4) inner tube is contour
And bottom surface greatly is coplanar, the circular passage between coal wind duct (4) and center wind duct (2) is oxygen-enriched air passage (3), oxygen-enriched sky
Gas passage (3) width is less than the half of endogenous wind passage (5) width, arrangement eddy flow in the conial channel of oxygen-enriched air passage (3)
Device (8) makes the ejection of oxygen-enriched air high-speed rotational, oxygen-enriched air passage (3) cyclone (8) and endogenous wind passage (5) cyclone (7)
Flow deflector gradual change angle is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410491655.3A CN104235837B (en) | 2014-09-24 | 2014-09-24 | Dual-cyclone mixed oxygen enrichment coal injection pipe for cement clinker rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410491655.3A CN104235837B (en) | 2014-09-24 | 2014-09-24 | Dual-cyclone mixed oxygen enrichment coal injection pipe for cement clinker rotary kiln |
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| Publication Number | Publication Date |
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| CN104235837A CN104235837A (en) | 2014-12-24 |
| CN104235837B true CN104235837B (en) | 2017-01-25 |
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| CN106338064A (en) * | 2016-10-20 | 2017-01-18 | 宁夏宝塔化工中心实验室(有限公司) | Incinerator oxygen-enriched nozzle used for carbonizing furnace tail gas combustion |
| CN110332818A (en) * | 2019-04-30 | 2019-10-15 | 上海源晗能源技术有限公司 | The method for improving cement rotary kiln coal powder performance under oxygen/carbon dioxide atmosphere |
| CN112178633A (en) * | 2020-09-29 | 2021-01-05 | 湖北赤焰热能工程有限公司 | Concentrated double-air-regulation cyclone burner and method |
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| CN101825278B (en) * | 2010-05-28 | 2012-01-25 | 华中科技大学 | Oxygen-rich combustor |
| CN102401373A (en) * | 2010-09-09 | 2012-04-04 | 哈尔滨工业大学 | Three-volute high temperature oxygen rich pulverized coal ignition device |
| CN103075729B (en) * | 2012-12-10 | 2015-06-17 | 杭州玺清环保科技有限公司 | Cement rotary kiln coal powder burner with oxygen-enriched micro-oil ignition device |
| CN103629664A (en) * | 2013-12-05 | 2014-03-12 | 刘国忠 | Multichannel oxygen-enriched combustor used in rotary kiln |
| CN103791495B (en) * | 2014-02-25 | 2016-09-07 | 中国建筑材料科学研究总院 | Oxygen-enriched low-NOx pulverized coal burner and application thereof |
| CN104033893B (en) * | 2014-06-28 | 2016-01-20 | 广西聚为能源科技有限公司 | Cement kiln oxygen-enriched combustion system |
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