CN201462853U - Combustion nozzle used in lime rotary kiln - Google Patents

Combustion nozzle used in lime rotary kiln Download PDF

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Publication number
CN201462853U
CN201462853U CN2009201045023U CN200920104502U CN201462853U CN 201462853 U CN201462853 U CN 201462853U CN 2009201045023 U CN2009201045023 U CN 2009201045023U CN 200920104502 U CN200920104502 U CN 200920104502U CN 201462853 U CN201462853 U CN 201462853U
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CN
China
Prior art keywords
passage
air
zle
axial flow
rotary kiln
Prior art date
Application number
CN2009201045023U
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Chinese (zh)
Inventor
宋彦洪
Original Assignee
新兴铸管股份有限公司
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Priority to CN2009201045023U priority Critical patent/CN201462853U/en
Application granted granted Critical
Publication of CN201462853U publication Critical patent/CN201462853U/en

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Abstract

The embodiment of the utility model discloses a combustion nozzle used in a lime rotary kiln. The combustion nozzle comprises a coke oven gas passage, a blast furnace gas passage, and a swirl air passage, and further comprises a central air passage, an axial flow air passage, a pulverized coal passage, and a pulverized coal inlet communicated with the pulverized coal passage; the central air passage is arranged in the center of the combustion nozzle of the lime rotary kiln; and the axial flow air passage is arranged at the outer circumference of the central air passage. By additionally arranging the pulverized coal passage, the utility model effectively mitigate the problem that off production is caused due to unstable gas pressure; the combustion nozzle adopts a six-passage structure; the utility model adopts combustion airs of central air, axial flow air and swirl air to replace swirl air solely adopted in the prior art, so that the rotation of flame is accelerated; a flow control valve is additionally mounted in each air passage, and the air volume of each air passage and the air speed at the outlet of the air passage can be changed by adjusting the opening degree of a central air valve, an axial flow air valve and a swirl air valve, so that the shape and the length of the flame can be adjusted.

Description

Lime rotary kiln burner noz(zle)
Technical field
The utility model relates to a kind of rotary kiln burner noz(zle), in particular, relates to the improved burner noz(zle) of using of a kind of lime rotary kiln.
Background technology
Rotary kiln is meant rotation calcining kiln (being commonly called as rotary kiln), and rotary kiln can be divided into cement kiln, chemical metallurgy kiln and limekiln by the material handling difference.
Existing lime rotary kiln all is to utilize blast furnace gas and coke-stove gas to act as a fuel.Yet in actual production, because the gas pressure instability, the lime production line often is forced to reduce or stop production, and blast furnace gas and coke-stove gas cost an arm and a leg, and brings very big loss to company.
Original rotary kiln burner noz(zle) is the triple channel structure, has the channel design that the coaxial cylinders suit is combined to form, comprise coke-stove gas passage, blast furnace gas passage, eddy flow wind passage, influent stream mouth with the supporting setting of each passage difference, the centre is the coke-stove gas passage, and the outside is the blast furnace gas passage, and outer shroud is eddy flow wind passage (combustion air), the fuel that adopts is: two kinds of fuel of coke-stove gas and blast furnace gas, a combustion air is an eddy flow wind passage.It is single that flame is adjusted means, guaranteeing under the constant situation of calcining heat, only relies on the air quantity of regulating a combustion air to regulate the length of flame, can not be suitable for the needs of more and more faster development.
The utility model content
In view of this, the utility model provides a kind of lime rotary kiln improved burner noz(zle), and the production line that brings owing to the gas pressure instability is forced to stop production and the passive situation of the underproduction to improve, and has improved operating efficiency.
For achieving the above object, the utility model provides following technical scheme:
A kind of lime rotary kiln burner noz(zle), has the channel design that the coaxial cylinders suit is combined to form, comprise coke-stove gas passage, blast furnace gas passage, eddy flow wind passage, influent stream mouth with the supporting setting of each passage difference, it is characterized in that: also comprise: center wind duct, axial flow wind passage and coal dust channel center wind passage are arranged on the center of the channel design that the coaxial cylinders suit is combined to form, and axial flow wind passage is arranged on the outer ring.
Preferably, above-mentioned lime rotary kiln burner noz(zle), described coal dust passage are arranged between described coke-stove gas passage and the described axial flow wind passage.
Preferably, above-mentioned lime rotary kiln burner noz(zle) also comprises being arranged on described coal dust passage, blast furnace gas passage and described coke-stove gas passage forward spin flow fan blade.
Preferably, above-mentioned lime rotary kiln burner noz(zle), described center wind duct, axial flow wind passage and described eddy flow wind passage adopt same air inlet.
Preferably, above-mentioned lime rotary kiln burner noz(zle) also comprises three manual modulation valves that are arranged on the outer pipeline of described center wind duct, axial flow wind passage and described eddy flow wind passage burner.
From above-mentioned technical scheme as can be seen, among the utility model embodiment by having added the coal dust passage, effectively alleviated owing to the unstable problem of bringing of being forced to stop production of gas pressure, and burner noz(zle) is six channel designs, combustion air changes center wind into by original single eddy flow wind, axial flow wind and eddy flow wind, quickened the rotation of flame, each air channel has all increased flow control valve, by regulating center wind, the valve opening of axial flow wind and eddy flow wind, change the air quantity and the outlet wind speed in each air channel, reach the shape of adjustment flame and the purpose of length, the burner noz(zle) of this structure has brought tangible economic benefit:
1, improve the benefit of lime output:
After adopting the mixed combustion nozzle, the lime daily output is brought up to 800 tons by 715 tons, has improved 85 tons, 3.0 ten thousand tons of year raising output.After active lime improves output, benefit from steel-making and sintering carry produce and lower consumption demonstrate fully.
2, save the benefit of coal gas:
After adopting the mixing burner, the grey coke-stove gas of ton is by 196.81m 3/ t is reduced to 112.32m 3/ t has reduced 84.49m 3/ t, blast furnace gas is by 117.15m 3/ t is reduced to 86.15m 3/ t has reduced 31m 3/ t, the injecting coal quantity of increase are 76.9kg/t, 0.72 yuan/m of coke-stove gas unit price 3, 0.035 yuan/m of blast furnace gas unit price 3, the price of coal dust is 550 yuan/ton, the benefit of the grey gas of economizing on coal of ton is behind the employing mixing burner:
84.49 * 0.72+31 * 0.035-0.0769 * 550=19.62 unit/ton.
After adopting the mixed combustion nozzle, year lime output is according to 270,000 tons of calculating, and the gas year benefit of economizing on coal is:
19.62 ten thousand yuan of * 27=529.74
3, adopt the comprehensive benefit of mixing with burner noz(zle):
Oneself design and develop burner and reduce 300,000 yuan of purchase costs.
30+529.74=559.74 ten thousand yuan
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The lime rotary kiln burner noz(zle) structural representation that Fig. 1 provides for the utility model embodiment;
Fig. 2 is the A-A sectional drawing of Fig. 1.
The specific embodiment
The utility model discloses a kind of lime rotary kiln burner noz(zle),, improved operating efficiency to reduce owing to the unstable production line that brings of gas pressure is forced to stop production and the underproduction.
It is unstable and production line that bring is forced to stop production and the basic thought of the underproduction is that the utility model solves in the prior art gas pressure: added the coal dust passage at the lime rotary kiln in burner noz(zle), reduced the use amount of coal gas, effectively alleviated owing to the unstable problem of bringing of being forced to stop production of gas pressure.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
See also Fig. 1, Fig. 2, the lime rotary kiln burner noz(zle) structural representation that Fig. 1 provides for the utility model embodiment, Fig. 2 are the A-A sectional drawing of Fig. 1.
Wherein, 1 is a combustion air pipeline, 2 are rotation wind passage, 3 is coal gas of converter or blast furnace gas passage, and 4 is the coke-stove gas passage, and 5 is the coal dust passage, 6 is axial flow wind passage, 7 is center wind duct, and 8 is rotating blading, and 9 is eddy flow air channel flow control valve, 10 is axial flow air channel flow control valve, 11 is air channel, center flow control valve, and 201 is the outer pipeline of eddy flow wind burner noz(zle), and 301 is coal gas of converter or blast furnace gas inlet, 401 are the coke-stove gas inlet, 501 is coal powder entrance, and 601 is the outer pipeline of axial flow wind burner noz(zle), and 701 is the outer pipeline of center wind burner noz(zle).
The utility model embodiment adopts six channel designs, promptly is provided with center wind duct 7, axial flow wind passage 6, coal dust passage 5, coke-stove gas passage 4, coal gas of converter or blast furnace gas passage 3, eddy flow wind passage 2 respectively in burner noz(zle) inside.
Center wind duct 7 is arranged on the center of lime rotary kiln with burner noz(zle), axial flow wind passage 6 is arranged on the outer ring of center wind duct 7 ringwise, coal dust passage 5 is arranged on the outer ring of axial flow wind passage 6 ringwise, coke-stove gas passage 4 is arranged on the outer ring of coal dust passage 5 ringwise, coal gas of converter or blast furnace gas passage 3 are arranged on the outer ring of coke-stove gas passage 4 ringwise, and rotation wind passage 2 is arranged on the outer ring of coal gas of converter or blast furnace gas passage 3 ringwise.
Pipeline 201 outside the burner noz(zle) outer setting has eddy flow wind burner noz(zle), coal gas of converter or blast furnace gas inlet 301, coke-stove gas inlet 401, coal powder entrance 501, the pipeline 601 that axial flow wind burner noz(zle) is outer, the pipeline 701 that center wind burner noz(zle) mouth is outer.Outer outer pipeline 601 and the outer pipeline 701 of center wind burner noz(zle) of pipeline 201, axial flow wind burner noz(zle) of described eddy flow wind burner noz(zle) adopts the blowing of same air port.
Be connected at the coal gas of converter of burner noz(zle) outside or the coal gas of converter or the blast furnace gas passage 3 of blast furnace gas inlet 301 and burner noz(zle) inside, blast furnace gas carries out ignition combustion from 301 coal gas of converter or the blast furnace gas passages 3 that spray into burner noz(zle) inside that enter the mouth outside coal gas of converter or blast furnace gas passage 3 ejection burner noz(zle)s.
The coke-stove gas passage 4 of coke-stove gas inlet 401 and burner noz(zle) inside is connected, and coke-stove gas carries out ignition combustion from the 401 coke-stove gas passages 4 that spray into burner noz(zle) inside that enter the mouth outside coke-stove gas passage 4 ejection burner noz(zle)s.
The coal dust passage 5 of coal powder entrance 501 and burner noz(zle) inside is connected, and coal dust carries out ignition combustion from the 501 coal dust passages 5 that spray into burner noz(zle) inside that enter the mouth outside coal dust passage 5 ejection burner noz(zle)s.
Eddy flow air channel flow control valve 9 is arranged on the outer pipeline 201 of eddy flow wind burner noz(zle), axial flow air channel flow control valve 10 is arranged on the outer pipeline 601 of axial flow wind burner noz(zle), and air channel, center flow control valve 11 is arranged on the outer pipeline 701 of center wind burner noz(zle).
For the sake of clarity, below the burner noz(zle) of lime rotary kiln is simply described:
Whether the process facility of at first checking the lime system before the igniting possesses ignition condition, if satisfy the requirements, coke-stove gas, coal gas of converter or blast furnace gas are carried out the explosion-proof test of coal gas by the coal gas operations staff, explanation coal gas possesses ignition condition after the pass the test, at first light naked light and (reach burner noz(zle) the place ahead after generally lighting with burning torch in the dead ahead of burner noz(zle), or hang over the burner noz(zle) front portion with the oil-containing cotton yarn and light), at the slow Open valve coke-stove gas that ignites, require progressively to increase coke oven, converter and coal dust quantity then according to heating curve.
Outwards spray according to certain angle of flare eddy flow in coke-stove gas and the coal gas of converter special-purpose blast tube in the burner noz(zle), the rotation spread condition is determined by the angle of the rotating blading in the blast tube of burner inside and the length of fan blade, eddy flow hearsay by outer neighbour is given the quite high kinetic energy and the moment of momentum, advance to rotate at a high speed, and continuation radial diffusion, meet with the axial flow wind bundle that penetrates at a high speed, the insertion of axial flow wind bundle has further strengthened gaseous fuel and Air mixing, and the degree of divergence of adjustable flame, can regulate flame length as required, thickness, reach and produce desirable flame profile, coal dust sprays (carrying with high pressure Lodz blower fan) in the coal dust designated lane of burner noz(zle) inside, because the effect of the eddy flow fan blade in the passage of burner noz(zle) inside, carrying out the high speed rotation after the coal dust ejection mixes with center wind and axial flow wind, because center wind and the higher muzzle velocity of axial flow wind, move after driving coal dust, the burning extent of coal dust is prolonged, prolonged the length of burning zone, coal dust and carbon monoxide can fully be burnt, and play the current stabilization effect, the growth of kliner coating has been controlled in the generation that has reduced localized hyperthermia.
It is six independently passages (middle be the circular passage for circular channel, remaining five) that the utility model is divided into from inside to outside, being respectively: center wind duct, axial flow wind passage, coal dust passage, coke-stove gas passage, coal gas of converter or blast furnace gas passage and eddy flow wind passage. the control of quantity of fuel relies on the electric control valve of installing on the burner fuel channel into to control, and comes the fuel metering amount according to the temperature in the rotary kiln, lime quality situation and flame profile.
Coke-stove gas, coal gas of converter and coal dust are by the designated lane in the burner noz(zle) and the effect of rotating blading, outwards spray from the burner noz(zle) head according to certain angle of flare, mix with the eddy flow wind of outer shroud, entrainmenting of inboard axial flow wind, the abundant mixing of fuel and combustion air, high temperature secondary combustion air simultaneously also participates in burning, simultaneously can cover flame, add the formed bowl-shape effect of flame cover, prevent that flame from spreading too early, effectively avoided the too early formation in localized hyperthermia district, prolonged the length of flame and made full combustion of fuel.Eddy flow wind be a footpath aweather, by regulating the air quantity of eddy flow wind and axial flow wind, change the outlet and reach the purpose that changes flame profile thereby reach, the outlet of center wind can be elongated flame at a high speed, the burning time that prolongs coal dust coal dust is fully burnt and the shape of the retention flame.It is good that this burner noz(zle) is applied to production effect, and fuel combustion is abundant, reached requirement energy-saving and cost-reducing and adaptation pluralities of fuel structure, and economic benefit is obvious.
Combustion air changes center wind into by original single eddy flow wind, axial flow wind and eddy flow wind, quickened the rotation of flame, each air channel has all increased flow control valve, by regulating center wind, the valve opening of axial flow wind and eddy flow wind, change the air quantity and the outlet wind speed in each air channel, reach the shape of adjustment flame and the purpose of length, at center wind, increased the coal dust passage respectively between axial flow wind and the eddy flow wind, the blast furnace gas passage, the coke-stove gas passage, and at the coal dust passage, the blast furnace gas passage, the eddy flow fan blade is installed on the coke-stove gas passage, adjustment by the eddy flow fan blade angle, reach coal dust and combustion air, blast furnace gas and combustion air, the abundant mixing of coke-stove gas and combustion air, improve the efficiency of combustion of fuel, under the muzzle velocity that high speed is rotated and center wind is higher of eddy flow wind, the combustion zone of coal dust be elongated and after move, guarantee the abundant burning of coal dust on the one hand, reduced the localized hyperthermia of burning zone on the other hand, lowered the possibility that the ring formation situation takes place.
This burner noz(zle) can coal dust and gas mixed burning, also can all use coal gas.After adopting the mixed combustion nozzle, flame rotation quickening and flame are easy to adjust flexibly, spray adds not to be had the ring formation phenomenon behind the coal dust yet (flame, the combustion air of rotation is wrapped in intermediate combustion with coal dust at a high speed, can't form the localized hyperthermia district, so do not have the ring formation phenomenon to take place), kiln end temperature by original 1100 ℃, bring up to 1200 ℃ and improved 100 ℃, improved the predecomposition rate of lime stone in preheater.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims (5)

1. lime rotary kiln burner noz(zle), has the channel design that the coaxial cylinders suit is combined to form, comprise coke-stove gas passage, blast furnace gas passage, eddy flow wind passage, influent stream mouth with the supporting setting of each passage difference, it is characterized in that: also comprise: center wind duct, axial flow wind passage and coal dust passage, center wind duct is arranged on the center of the channel design that the coaxial cylinders suit is combined to form, and axial flow wind passage is arranged on the outer ring.
2. lime rotary kiln burner noz(zle) as claimed in claim 1 is characterized in that, described coal dust passage is arranged between described coke-stove gas passage and the described axial flow wind passage.
3. lime rotary kiln burner noz(zle) as claimed in claim 1 is characterized in that, also comprises in the channel design that the coaxial cylinders suit is combined to form being arranged on described coal dust passage, blast furnace gas passage and described coke-stove gas passage forward spin flow fan blade.
4. lime rotary kiln burner noz(zle) mouth as claimed in claim 1 is characterized in that, described center wind duct, axial flow wind passage and described eddy flow wind passage adopt same air inlet.
5. lime rotary kiln burner noz(zle) as claimed in claim 1 is characterized in that, also comprises three flow control valves that are arranged on the outer pipeline of described center wind duct, axial flow wind passage and described eddy flow wind passage burner.
CN2009201045023U 2009-09-16 2009-09-16 Combustion nozzle used in lime rotary kiln CN201462853U (en)

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CN2009201045023U CN201462853U (en) 2009-09-16 2009-09-16 Combustion nozzle used in lime rotary kiln

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Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102213422A (en) * 2011-04-21 2011-10-12 扬州市银焰机械厂 Multi-channel mixed gas burner
CN102795651A (en) * 2012-09-07 2012-11-28 宁夏兴平精细化工股份有限公司 Method for directly producing powdery calcium oxide from dicyandiamide waste residues
CN102978382A (en) * 2012-12-31 2013-03-20 湘西自治州德邦锰业有限责任公司 Manganese oxide reduction system of internal heating type rotary kiln
CN103217012A (en) * 2013-04-09 2013-07-24 贵州安凯达新型建材有限责任公司 Energy-saving rotary kiln
CN103672906A (en) * 2013-12-12 2014-03-26 贵州安凯达实业股份有限公司 Converter gas and pulverized coal mixed combustion device
CN104180647A (en) * 2014-09-15 2014-12-03 四川德胜集团钒钛有限公司 Method for improving temperature in rotary kiln
CN112023834A (en) * 2020-11-03 2020-12-04 小跃科技(北京)有限公司 High-temperature carbon dioxide collecting furnace

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102213422A (en) * 2011-04-21 2011-10-12 扬州市银焰机械厂 Multi-channel mixed gas burner
CN102213422B (en) * 2011-04-21 2012-12-19 扬州市银焰机械厂 Multi-channel mixed gas burner
CN102795651A (en) * 2012-09-07 2012-11-28 宁夏兴平精细化工股份有限公司 Method for directly producing powdery calcium oxide from dicyandiamide waste residues
CN102978382A (en) * 2012-12-31 2013-03-20 湘西自治州德邦锰业有限责任公司 Manganese oxide reduction system of internal heating type rotary kiln
CN102978382B (en) * 2012-12-31 2014-04-02 湘西自治州德邦锰业有限责任公司 Manganese oxide reduction system of internal heating type rotary kiln
CN103217012A (en) * 2013-04-09 2013-07-24 贵州安凯达新型建材有限责任公司 Energy-saving rotary kiln
CN103217012B (en) * 2013-04-09 2015-10-28 贵州安凯达实业股份有限公司 A kind of energy-conservation rotary kiln
CN103672906A (en) * 2013-12-12 2014-03-26 贵州安凯达实业股份有限公司 Converter gas and pulverized coal mixed combustion device
CN104180647A (en) * 2014-09-15 2014-12-03 四川德胜集团钒钛有限公司 Method for improving temperature in rotary kiln
CN112023834A (en) * 2020-11-03 2020-12-04 小跃科技(北京)有限公司 High-temperature carbon dioxide collecting furnace

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