CN104235837A - 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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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
The clinker rotary kiln double-cyclone mixed type oxygen-enriched coal spray pipe of technical field invention relates to one and has technical characteristics such as " in oxygen-enriched air local combustion supporting, coal wind the mixing of outside double-cyclone, high speed difference high thrust jets ", be applicable to building material industry cement and refractory material rotary kiln, metallurgy industry rotary kiln, chemical industry rotary kiln and lime industry rotary kiln, the devices such as multichannel combustion gasification reactor or nozzle process powder use.
The current manufacture of cement of background technology faces the severe situation such as production capacity surplus, the rise in price of coal electric energy.Applicating energy-saving new technology, as oxygen-enriched combusting and swirl flow combustion, plays existing rotary kiln (also known as rotary kiln) productive potentialities, is the key that product competitiveness in the market improves in enterprise.Coal injection pipe is related to system throughput, hear rate and environmental protection problem, and service life built by rotary kiln stability, kliner coating and kiln lining.Coal injection pipe coal consumption accounts for production line comprehensive energy consumption ratio up to 30% ~ 50%.Practice shows: existing coal injection pipe great majority are coal dust and oxygen molecule Homogeneous phase mixing problem based on normal oxygen air burning and when being difficult to solve large output, and cause kiln temperature on the low side, unit grog coal consumption index is higher, and production efficiency is on the low side.
The side pipe that oxygen-enriched air pipeline Sum decomposition stove and rotary kiln coal injection pipe primary air piping are newly established by patent CN201458983 U is communicated with, and is mixed into by oxygen-enriched air in coal injection pipe First air.Patent CN203024574 U oxygen lance is blown into flame kernel at a high speed through coal injection pipe central tube.Patent CN202177298 U sets up calment burner above grog grid cooler, and preheating oxygen-enriched air is mixed in Secondary Air and is inhaled in kiln.This patent makes technique complicate.Oxygen-enriched air directly joins in airduct by patent CN102705837 A, and patent CN102913939 A oxygen-enriched air is sucked by rotary kiln and dore furnace blower fan, makes coal powder lance wind all replace with oxygen-enriched air.Patent CN103672886 A sets up oxygen-enriched air spray gun outside coal injection pipe axial flow wind passage, and spray gun spout is arranged on ° circular arc of axial flow wind nozzle outer circumference lower central angle≤270.This patent enhances flame-material radiant heat transfer, but complex structure and be difficult to accurate manufacture.Patent CN102434890A is separated secondary membrane the higher degree infiltration oxygen rich air obtained and sends coal injection pipe central air hose to, and comparatively low-purity delay oxygen rich air sends coal injection pipe axial flow airduct to.Oxygen-enriched air only injects coal injection pipe centre wind or First air simply, there will be localized hyperthermia, NO
xthe problems such as discharge increase and kiln temperature skewness.Oxygen-enriched air injects coal injection pipe Secondary Air simply or simply substitutes all with wind, and oxygen-enriched air utilization ratio is not high, and there will be oxygen-enriched air waste increases, the problems such as day-to-day operation expense increase.Patent CN103496863 A discloses a kind of four-way coal injection pipe oxygen enrichment method for calcinating, does not relate to new equipment.
Development structure is simple, air/oxygen-enriched air mixes with fine coal, play rotary kiln produces potential and improves the oxygen-enriched coal spray pipe sintering efficiency, has good economy, energy-conserving and environment-protective and social benefit.
Summary of the invention mixes reason in order to overcome coal dust when existing multi-passage coal injection Guan Yin uses normal oxygen air, large output with oxygen molecule is uneven, there is the shortcomings such as kiln temperature is on the low side, coal consumption is higher and production efficiency is on the low side, Invention Announce one has technical characteristics such as " in oxygen-enriched air local combustion supporting, coal wind the mixing of outside double-cyclone, high speed difference high thrust jets ", meets and excavates rotary kiln and produce potential needs, clinker rotary kiln double-cyclone mixed type oxygen-enriched coal spray pipe that oxygen-enriched air utilization rate is high.
Clinker rotary kiln double-cyclone mixed type oxygen-enriched coal spray pipe, comprise order to be from inside to outside set with and coaxial line center drum and four posts cone cylinders, each post cone cylinder comprises a frustum of a cone cylinder and a cylinder, cylinder exit end face and frustum of a cone cylinder entrance point little bottom surface full weld link, the taperings such as four frustum of a cone cylinders are contour and little bottom surface is coplanar, center drum exit end face and four large bottom surfaces of frustum of a cone cylinder coplanar, the passage that center drum and four posts cone cylinder surround from inside to outside is followed successively by burning torch passage, center wind duct, coal wind duct, interior wind passage and axial flow wind passage, arrange in the conial channel of interior wind passage that cyclone makes the ejection at a high speed of interior wind eddy flow, the Circular Plate that center wind duct exit end face full weld connects one piece of uniform aperture makes centre wind be parallel to the ejection of center wind duct axis with numerous little mode of jet, the little bottom surface of frustum of a cone cylinder entrance point is linked unlike setting up a cylinder exit end face full weld in center wind duct with traditional four-way coal injection pipe, and bore cylinder with the post of center wind duct coaxial line, in the post cone frustum of a cone cylinder of cylinder set up and coal wind duct, the tapering such as frustum of a cone cylinder of pipe is contour and large bottom surface is coplanar, circular passage between coal wind duct and center wind duct is oxygen-enriched air passage, oxygen-enriched air channel width is no more than the half of interior wind channel width, arrange in the conial channel of oxygen-enriched air passage that cyclone makes oxygen-enriched air high-speed rotational spray, the flow deflector gradual change angle of oxygen-enriched air channel rotational-flow device and interior wind channel rotational-flow device is equal.
Take fine coal as the building material industry novel dry-method cement clinker sintering of fuel, refractory material drying, calcination of lime, metallurgy industry is dry, oxidizing roasting, chemical industry oxidizing roasting and environmental protection industry (epi) burn uses rotary kiln device, multichannel combustion gasification reactor or nozzle process powder place, can use the present invention.
Invention economy, energy-conserving and environment-protective and social benefit are remarkable.Commercial Application shows: kiln combustion temperature improves 100 DEG C ~ 150 DEG C, unit grog product coal consumption declines 5% ~ 10%, coal saving rate 5% ~ 10%, pulverized coal friring time 10% ~ 15%, rotary kiln production capacity improves 10% ~ 15%, combustion air volume and blast, flue gas flow, containing CO, NO
xand temperature all has reduction or reduces, take away thermal loss with flue gas and reduce, the former high-quality anthracite used can be substituted with the low calorific value coal inferior such as bituminous coal, brown coal.
Accompanying drawing explanation
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 double-cyclone mixed type oxygen-enriched coal spray pipe exit end face figure.1 is burning torch passage, wind passage centered by 2, and 3 is oxygen-enriched air passage, and 4 is coal wind duct, and 5 is interior wind passage, and 6 is axial flow wind passage, and 7 is cyclone, and 8 is cyclone.
Detailed description of the invention:
Below in conjunction with accompanying drawing, invention is further described.
As shown in Figures 1 and 2, clinker rotary kiln double-cyclone mixed type oxygen-enriched coal spray pipe, comprises order from inside to outside and is set with and coaxial line center drum and four posts cone cylinders.Each post cone cylinder comprises a frustum of a cone cylinder and a cylinder, and cylinder exit end face and frustum of a cone cylinder entrance point little bottom surface full weld link.The taperings such as four frustum of a cone cylinders are contour, and little bottom surface is coplanar, center drum exit end face and four large bottom surfaces of frustum of a cone cylinder coplanar.Center drum length is much larger than four frustum of a cone cylinder height.The passage that center drum and four posts cone cylinder surround from inside to outside is followed successively by burning torch passage 1, center wind duct 2, coal wind duct 4, interior wind passage 5 and axial flow wind passage 6.Burning torch centrally cylinder axis passes centered cylinder internal channel.The Circular Plate that center wind duct 2 exit end face full weld connects one piece of uniform aperture makes centre wind be parallel to the ejection of center wind duct 2 axis with numerous little mode of jet.Arrange in the conial channel of interior wind passage 5 that cyclone 7 makes the ejection at a high speed of interior wind eddy flow.The little bottom surface of frustum of a cone cylinder entrance point is linked unlike setting up a cylinder exit end face full weld in center wind duct 2 with traditional four-way coal injection pipe structure, and and the post cone cylinder of center wind duct 2 coaxial line.In the frustum of a cone cylinder of newly-increased post cone cylinder and coal wind duct 4, the tapering such as frustum of a cone cylinder of pipe is contour and large bottom surface is coplanar.Circular passage in coal wind duct 4 between pipe and newly-increased post cone cylinder is oxygen-enriched air passage 3, wind passage 2 centered by the circular passage between newly-increased post cone cylinder and center drum.Circular passage between coal wind duct 4 and center wind duct 2 is oxygen-enriched air passage 3, and oxygen-enriched air passage 3 width is no more than the half of interior wind passage 5 width.Arrange in the conial channel of oxygen-enriched air passage 3 that cyclone 8 makes oxygen-enriched air high-speed rotational spray.The flow deflector gradual change angle of oxygen-enriched air passage 3 cyclone 8 and interior wind passage 5 cyclone 7 is equal, interior wind swirl velocity size and oxygen-enriched air swirl velocity equal and opposite in direction when leaving frustum of a cone cylinder exit end face.
The oxygen-enriched coal spray pipe of invention indication, comprises order from inside to outside and is set with and coaxial line center drum and five posts cone cylinders, be 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, interior wind passage 5 outer tube and axial flow wind passage 6 outer tube.Each post cone cylinder comprises a frustum of a cone cylinder and a cylinder, cylinder exit end face is connected with frustum of a cone cylinder entrance point little bottom surface full weld, pipe external diameter is equal with frustum of a cone cylinder little bottom surface external diameter, the taperings such as five posts cone cylinders, contour, expand gradually to direction vertical section diameter in kiln, little bottom surface on same perpendicular, large bottom surface is on same perpendicular.Center drum length and five posts cone tube length degree roughly equal.Burning torch centrally cylinder axis crossing point firelock passage 1 is arranged.In center wind duct 2, pipe is burning torch passage 1 outer tube, wind passage 2 outer tube centered by pipe in oxygen-enriched air passage 3, in coal wind duct 4, pipe is oxygen-enriched air passage 3 outer tube, and in interior wind passage 5, pipe is coal wind duct 4 outer tube, and in axial flow wind passage 6, pipe is interior wind passage 5 outer tube.Wind passage 2 centered by circular passage between burning torch passage 1 pipe and center wind duct 2 outer tube, between center wind duct 2 outer tube and oxygen-enriched air passage 3 outer tube, circular passage is oxygen-enriched air passage 3, between oxygen-enriched air passage 3 outer tube and coal wind duct 4 outer tube, circular passage is coal wind duct 4, between coal wind duct 4 outer tube and interior wind passage 5 outer tube, circular passage is interior wind passage 5, and between interior wind passage 5 outer tube and axial flow wind passage 6 outer tube, circular passage is axial flow wind passage 6.Oxygen-enriched air passage 3 width is no more than the half of interior wind passage 5 width.Arrange in the conial channel of interior wind passage 5 that cyclone 7 makes interior wind high-speed rotational spray, arrange in the conial channel of oxygen-enriched air passage 3 that cyclone 8 makes oxygen-enriched air high-speed rotational spray, cyclone 8 is equal with cyclone 7 flow deflector gradual change angle, make oxygen-enriched air jet swirl velocity size and interior wind jet swirl velocity equal and opposite in direction, direction is identical.The Circular Plate that center wind duct 2 exit end face full weld connects one piece of uniform aperture makes centre wind in numerous the little flow jet mode along being parallel to the ejection of center wind duct 2 axis direction, coal wind goes out coal wind duct 4 with " V " shape jet stream, and axial flow wind is with " V " shape jet ejection axial flow wind passage 6 at a high speed.Centre wind, coal wind and axial flow wind are direct current wind, and oxygen-enriched air and interior wind are Whirl deposite tank.
Flow out from coal wind duct 4 in " V " shape jet after coal dust and compressed air mixing.A bit of cylinder is connected along the frustum of a cone cylinder large bottom surface full weld being parallel to center circle tube axis direction axial flow wind passage 6 outer tube in kiln, " V " shape high-speed jet ejection is substituted with horizontal high-speed jet after axial flow wind leaves the large bottom surface of frustum of a cone cylinder, so both can reduce high speed axial flow wind and wash away rotary kiln liner prematurely, centrally can elongate flame by pipe axis direction again, meet the heating needs of rotary kiln overlength flame.
At 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, interior wind and axial flow wind are not all ganged up.
Coal dust is carried by air-flow and outwards flows out by certain diffusion angle from coal wind duct 4, wind high-speed rotational ejection in flowing out from interior wind passage 5, outside coal wind, pass to coal wind facies when high momentum and the moment of momentum, high-speed spiral advances and continues radial diffusion, meets with high speed axial flow wind facies.From the oxygen-enriched air high-speed rotational ejection that oxygen-enriched air passage 3 flows out, inside coal wind, pass to coal wind facies when high momentum and the moment of momentum, high-speed spiral advances and continues radial diffusion.Oxygen-enriched air is eddy flow diffusion inside coal wind, impel on the one hand and hold up coal wind, coal wind direction axis direction is stoped to be assembled, oxygen-enriched air and the full and uniform mixing of coal wind, strengthen the utilization rate of oxygen-enriched air, increase near zone negative pressure in invention indication oxygen-enriched coal spray pipe port of export kiln on the other hand, strengthen high temperature gases recirculating intensity, the steady flame effect of strengthening high temperature gases recirculating.The insertion of axial flow wind, further enhancing the mixing of coal wind, and the degree of divergence of adjustable flame, length and thickness.Center wind action impels the burning of a small amount of coal dust of core and CO more abundant, and play current stabilization.Interior wind eddy flow can entrainment coal wind, and coal wind and interior wind are fully mixed, coal wind and the full and uniform mixing of axial flow wind, stops axial flow wind to be assembled to axial flow wind axis direction prematurely, makes it the needs adapting to the heat transfer of long flame.Due to the high speed that Whirl deposite tank and axial flow wind have, burning is very fast and completely.
Centre wind, interior wind, coal wind and axial flow wind are all the normal oxygen air containing oxysome volume concentrations 21%.Oxygen-enriched air is containing oxysome volume concentrations 21% ~ 40%, can be utilize embrane method method for producing oxygen through to obtain and through the oxygen-enriched air of compressor boosting, can be that the oxygen that utilizes pressure-variable adsorption/cryogenic method to obtain and normal oxygen air are mixed to get and the oxygen-enriched air boosted through compressor.Coefficient of excess air 1.15 ~ 1.25.Coal wind speed degree 22m/s ~ 35m/s, axial flow wind speed degree 85m/s ~ 220m/s, interior wind and oxygen-enriched air speed 85m/s ~ 220m/s.Center air quantity is 0.6% ~ 0.8% of the whole air quantity of oxygen-enriched coal spray pipe, and coal air quantity is 6% ~ 15% of the whole air quantity of oxygen-enriched coal spray pipe, axial flow air quantity: interior air quantity: oxygen-enriched air amount is 60%: 25%: 15%.Cyclone 7 is identical with the flow deflector gradual change angle of cyclone 8, within 17 ° ~ 50 ° scopes.
Oxygen-enriched coal spray pipe gradient is identical with rotary kiln gradient, fixes at kiln hood end support or suspension bracket, and can move forward and backward along oxygen-enriched coal spray tubular axis line.Igniting terminates rear burning torch and draws a rear segment distance or overall pull-out to avoid scaling loss, and coal injection pipe center circle tube passage F tail end flange seal.Oxygen-enriched coal spray tubular axis stream wind passage 6 outer tube uses high-strength fireproof pour material, and reserved horizontal longitudinal expansion joint.
Invention architectural feature, technical characteristic and the technique effect brought are described in detail as follows:
The architectural feature that invention has " set up oxygen-enriched air passage 3 between center wind duct 2 and coal wind duct 4, oxygen-enriched air is high-speed rotational diffusion inside coal wind ".For traditional four-way coal injection pipe, center wind duct 2 outer tube is pipe in coal wind duct 4, is the centre wind of numerous little direct jet form inside coal wind.Oxygen-enriched air passage 3 outer tube of one and center wind duct 2 outer coaxial tube line set up by the oxygen-enriched coal spray pipe of invention indication in center wind duct 2 outer tube and coal wind duct 4 between pipe, oxygen-enriched air passage 3 outer tube comprises a cylinder and a frustum of a cone cylinder, outside diameter of cylinder is equal with newly-increased frustum of a cone cylinder entrance point little bottom surface external diameter, cylinder exit end face is connected with newly-increased frustum of a cone cylinder little bottom surface full weld, the taperings such as newly-increased frustum of a cone cylinder and the frustum of a cone cylinder of coal wind duct 4 outer tube, contour, newly-increased frustum of a cone cylinder expands gradually to direction vertical section diameter in kiln.Oxygen-enriched air passage 3 width is no more than the half of interior wind passage 5 width, arrange the cyclone 8 identical with cyclone 7 flow deflector gradual change angle in the conial channel of oxygen-enriched air passage 3, oxygen-enriched air is spread along oxygen-enriched air passage 3 axis direction to kiln inside spin with high-speed rotational form inside coal wind.Oxygen-enriched air swirl velocity size and interior wind swirl velocity equal and opposite in direction, direction are identical.Except burning torch passage 1, tradition four-way coal injection pipe comprises center wind duct 2, coal wind duct 4, interior wind passage 5 and axial flow wind passage 6, five post cone jacket casing dresses, four-way structures of coaxial line, and the oxygen-enriched coal spray pipe of invention indication comprises center wind duct 2, oxygen-enriched air passage 3, coal wind duct 4, interior wind passage 5 and axial flow wind passage 6, be six post cone jacket casing dresses, Five-channel structures of coaxial line.
Three technical characteristics that said structure feature causes are:
One is organize even local oxygen-enriched combusting in kiln.Compare with the effective normal oxygen air-breathing of traditional multi-passage coal injection, with oxygenized air combustion supporting, can combustion velocity be accelerated, and then increase rotary kiln production efficiency and excavate rotary kiln production potential.Outside double-cyclone hybrid mode in the coal wind of the oxygen-enriched coal spray pipe design of invention indication, avoids the problems such as the oxygen-enriched air local concentration that methods such as simply oxygen-enriched air being injected centre wind, coal wind, interior wind or axial flow wind exists is higher, oxygen enrichment utilization rate is not high, localized hyperthermia.Coal wind is evenly mixed into by oxygen-enriched air eddy flow radial direction, coal wind-oxygen-enriched air mixture radial direction is evenly mixed into axial flow wind approach, make the radial evenly diffusion of oxygen-enriched air, head-on radiation on the one hand between strengthening flame and material is conducted heat, and strengthens the indirect directed radiation heat transfer between flame-kiln liner on the other hand.Compare with patent CN103672886A, add the indirect directed radiation heat transfer effect between strengthening flame-kiln liner.
Two is by double-cyclone mixing in outside in coal wind, strengthening oxygen-enriched air and coal dust radial diffusion active force.The just wind eddy flow mixing in coal wind arranged outside of tradition four-way coal powder lance, the mixing of strengthening coal wind and interior wind, the immixture of coal wind and axial flow wind.Outside " interior wind eddy flow can entrainment coal wind; make coal wind and the radial Homogeneous phase mixing of interior wind; coal wind and the radial Homogeneous phase mixing of axial flow wind " technical characteristic that traditional four-way coal powder lance has, the oxygen-enriched coal spray pipe of invention indication also arranges the mixing of oxygen-enriched air eddy flow inside coal wind, the mixing of strengthening oxygen-enriched air-coal wind, the mixing of further strengthening coal wind and interior wind, the immixture of coal wind and axial flow wind, namely further enhancing coal wind radial direction and is mixed into the effect of axial flow wind.Oxygen-enriched air is high-speed rotational diffusion inside coal wind, hold up coal wind on the one hand, coal wind direction coal wind duct 4 axis direction can be stoped to assemble prematurely, impel oxygen-enriched air and the radial Homogeneous phase mixing of coal wind, strengthen oxygen-enriched air effective rate of utilization, increase near zone negative pressure in oxygen-enriched coal spray pipe port of export kiln on the other hand, strengthen high temperature gases recirculating intensity, the steady flame effect of strengthening high temperature gases recirculating.Due to the high swirl velocity that oxygen-enriched air, interior wind and axial flow wind have, burn very fast and complete.
Three is high speed difference high thrust jet flow strengthening coal wind and axial flow wind immixture.Oxygen-enriched coal spray pipe utilizes between wind and oxygen-enriched air in High-speed DC axial flow wind, high-speed rotational, low speed coal wind and forms rotary kiln, the exchange of the air-flow in its early stage and mixed performance are significantly improved, thus promotes coal dust firing and form stable combustion flame.Axial flow wind is High-speed DC wind, has very strong penetrability and entrainment flue gas ability, in a large number by the flue gas that entrainments directly with the coal dust mixed combustion in interior wind-coal wind mixture and oxygen-enriched air-coal wind mixture.Coal wind is low-speed DC wind, coal dust high-pressure delivery, and air quantity is less, and concentration is high, has good flammability.Interior wind and oxygen-enriched air are high-speed rotational wind, intensity is large, mixing is strong, momentum and heat transmission rapid, ensure that coal dust contacts with oxygen in very short time and apart from interior, and form local return district, by high temperature gases recirculating to flame section start, formation stabilizes the flame, and makes coal powder ignition time shorten.At the adhesive membrane that surfaces of carbon particles is formed with combustion product, this film thickness raises with temperature and increases, and hinders the carrying out of gas diffusion and combustion reaction, is removed as early as possible as early as possible by carbon grain surface film, thus can strengthen coal dust firing.Invention indication oxygen-enriched coal spray pipe arranges oxygen-enriched air and coal wind speed difference, interior wind and coal wind speed difference, axial flow wind and oxygen-enriched air-coal wind-Nei wind mixing wind speed difference, greatly strengthen the axis scraping power suffered by coal dust particle and radial shear power, unreacted inner unsalted surface in coal dust particle is more early exposed in axial flow wind quickly, realizes more thoroughly combustion reaction.
The technique effect that said structure characteristic sum technical characteristic brings is: kiln combustion temperature improves, pulverized coal friring time shorten, and 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.The adaptability of ature of coal is strengthened, can burning low grade coal, clinkersintering economy strengthens.Enhance coal injection pipe controlled flame shape joint property.When coal wind one timing, interior wind and oxygen-enriched air determine flame profile, and axial flow wind determines flame length, and interior wind and oxygen-enriched air determine flame thickness.Avoid during execute-in-place regulating a kind of wind separately, guarantee coal dust smooth combustion and ideal flame profile.
Take fine coal as the building material industry novel dry-method cement clinker sintering of fuel, refractory material drying, calcination of lime, metallurgy industry is dry, oxidizing roasting, chemical industry oxidizing roasting and environmental protection industry (epi) burn uses rotary kiln device, multichannel combustion gasification reactor or nozzle process powder place, can use the present invention.
Commercial Application shows: kiln combustion temperature improves 100 DEG C ~ 150 DEG C, unit grog product coal consumption declines 5% ~ 10%, economizes on coal 5% ~ 10%, the pulverized coal friring time 10% ~ 15%, rotary kiln production capacity improves 10% ~ 15%, combustion air volume and blast, flue gas flow, containing CO, NO
xand temperature all has reduction or reduces, take away thermal loss with flue gas and reduce, the former high-quality anthracite used can be substituted with the low calorific value coal inferior such as bituminous coal, brown coal.
Claims (1)
1. clinker rotary kiln double-cyclone mixed type oxygen-enriched coal spray pipe, comprise order to be from inside to outside set with and coaxial line center drum and four posts cone cylinders, each post cone cylinder comprises a frustum of a cone cylinder and a cylinder, cylinder exit end face and frustum of a cone cylinder entrance point little bottom surface full weld link, the taperings such as four frustum of a cone cylinders are contour and little bottom surface is coplanar, center drum exit end face and four large bottom surfaces of frustum of a cone cylinder coplanar, the passage that center drum and four posts cone cylinder surround from inside to outside is followed successively by burning torch passage (1), center wind duct (2), coal wind duct (4), interior wind passage (5) and axial flow wind passage (6), arrange in the conial channel of interior wind passage (5) that cyclone (7) makes the ejection at a high speed of interior wind eddy flow, the Circular Plate that center wind duct (2) exit end face full weld connects one piece of uniform aperture makes centre wind be parallel to the ejection of center wind duct (2) axis with numerous little mode of jet, it is characterized in that: set up cylinder exit end face full weld and link the little bottom surface of frustum of a cone cylinder entrance point center wind duct (2) is inner, and bore cylinder with the post of center wind duct (2) coaxial line, the tapering such as post the cone frustum of a cone cylinder of cylinder and the frustum of a cone cylinder of coal wind duct (4) interior pipe etc. set up is contour and large bottom surface is coplanar, circular passage between coal wind duct (4) and center wind duct (2) is oxygen-enriched air passage (3), oxygen-enriched air passage (3) width is no more than the half of interior wind passage (5) width, arrange in the conial channel of oxygen-enriched air passage (3) that cyclone (8) makes oxygen-enriched air high-speed rotational spray, the flow deflector gradual change angle of oxygen-enriched air passage (3) cyclone (8) and interior wind passage (5) cyclone (7) is equal.
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| 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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| 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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| CN104235837B (en) | 2017-01-25 |
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