CN202733886U - Inferior coal burner - Google Patents
Inferior coal burner Download PDFInfo
- Publication number
- CN202733886U CN202733886U CN 201220300801 CN201220300801U CN202733886U CN 202733886 U CN202733886 U CN 202733886U CN 201220300801 CN201220300801 CN 201220300801 CN 201220300801 U CN201220300801 U CN 201220300801U CN 202733886 U CN202733886 U CN 202733886U
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- airduct
- wind
- air
- tube
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Abstract
The utility model discloses an inferior coal burner in the field of a burner. The inferior coal burner comprises a channel tube of an igniter, an internal air tube, an internal cyclone tube, an air coal tube, an external cyclone tube, an external air tube, an internal air nozzle, an internal cyclone nozzle, an air coal nozzle, an external cyclone nozzle and an external air nozzle, wherein the internal air tube, the internal cyclone tube, the air coal tube, the external cyclone tube and the external air tube are coaxially sleeved outside the channel tube of the igniter from the inside to the outside in sequence, and the internal air nozzle, the internal cyclone nozzle, the air coal nozzle, the external cyclone nozzle, and the external air nozzle correspond to air outlet ends of pipelines and are arranged. Air deflectors which produce cyclone wind are arranged between the internal cyclone tube and the internal air tube and between the external cyclone tube and the air coal tube. Air inlet ends of the internal air tube, the internal cyclone tube and the external air tube are connected with an air supplying channel, and the igniter is arranged inside the channel tube of the igniter. According to the inferior coal burner, the external cyclone tube is increased in the igniter so as to enable ignition gas to be mixed with coal powder of low heating value, shorten time of ignition, improve stability of the ignition, and improve adjustability of burning of inferior coal by that micro air penetrates through the external cyclone tube. Effect of calcinations of raw materials is ensured. Meanwhile, burning cost of a cement enterprise is reduced. The inferior coal burner is applied to a step of calcinations of cement in the production of the cement.
Description
Technical field
The utility model relates to a kind of burner, particularly a kind of low heat value Low-rank Coal Burner.
Background technology
Along with the quick expansion of cement industry scale and improving constantly of environmental protection standard, the cement plant all when how thinking is improving the quality of production, reduces production costs, to remain on the competitiveness in the market both at home and abroad.
Cement production process commonly used in the prior art comprises following 6 large steps: 1. fragmentation and pre-homogenizing; 2. raw material preparation; 3. raw material homogenizing; 4. pre-thermal decomposition; 5. clinker burns till; 6. cement abrasive dust.Burning till in rotary kiln of clinker finished, carbonate further decomposes rapidly and a series of solid phase reactions occurs in rotary kiln, along with temperature of charge raises, the solid phase mineral can become liquid phase, the mineral that are dissolved in the liquid phase react a large amount of grogs of generation, after grog burnt till, temperature began to reduce.The last high temperature chamotte that rotary kiln is drawn off by cement clinker cooler is cooled to the temperature that downstream conveying, depots and cement grinding mill can bear, and reclaims simultaneously the sensible heat of high temperature chamotte, improves the thermal efficiency and the clinker quality of system.
Rotary kiln burner is usually used in the clinker, coal and electricity are energy consumes main in the cement production process, wherein coal consumption cost in some areas has accounted for the over half of totle drilling cost, use the local relatively low low calorific value coal of price of producing obviously to reduce production costs, thereby increase economic efficiency.Burner is the main coal equipment of using in the manufacture of cement, can effectively save high-grade energy so improve burner to adaptability and combustion stability, the modulability of the low heat value colm of cheapness, reduces entreprise cost.
The seventies in last century, external that use or inefficient single channel burner; But along with the rise of energy crisis and global building industry, cement industry has used high efficiency multicenter combustor to replace original single channel burner.
Rotary kiln burner not only provides fuel and oxidant for burning, also is the topmost power set of flame moulding simultaneously.Therefore, accurate technique, with good operating mode is provided, to clinker burning, cost reduction is very important all.A wind in the burner internal channel is the artificial wind that the cement firing system is had the greatest impact, the quantity that becomes the combustion of shape ﹑ combustion material to burn ﹑ suction volume Secondary Air to flame all has a great impact, and therefore wind of accurate control helps the raising of grog product ﹑ quality and the saving of coal electric resources; The temperature of a wind is very low, and too much participation combustion process has reduced significantly then that the bar spare ﹑ that catches fire increases that blower fan electricity consumption ﹑ also is unfavorable for the burning of coal dust and the waste that causes resource.But because wind plays a part transfer the fuel and flame thereby can not cancel, therefore only have the occupation rate of cold wind of reduce in total blast volume (comprising two wind ﹑ of wind ﹑ kiln tail high-temperature flue gas) to guarantee the combustion efficiency of burner.Simultaneously because the heat energy major part that the raw material calcining needs is propagated so the temperature of flame and shape very important just by the flame light radiation.Flame temperature has reflected the distribution situation of energy particle, distributes uniformly highly beneficial to clinker burning; Show according to foreign study, short and narrow flame is conducive to crystallization and kliner coating and the burner life-time dilatation of Ran Shao ﹑ slag of the Duan Shao ﹑ coal dust of grog most, and the heat flux distribution of this flame is also more satisfactory.The stability of flame will guarantee stability and the equipment Operation safety of the quality of clinker burning.What affect flame mainly is that Feng Shuaied the ﹑ muzzle velocity, swirl strength, coal dust Zhong Lei ﹑ granular size etc.
In the prior art, a kind of oil/coal dual burner is arranged, its publication number is: CN200968598, and the patent No. is: 200620011395.6, comprise the bellows that are arranged at the rear portion, combustion chamber and be set in successively from inside to outside wind coal pipe, oil gun in the wind box duct; The wind coal import of described wind coal pipe rear end is connected by the wind coal machine of conveyance conduit with the outside; Described oily muzzle end is equiped with atomizer, and the hydraulic fluid port of oil gun rear end is connected by the oil pump of oil pipe line with the outside.
Also have a kind of rotary kiln five-duct coal burner, its publication number is: CN2529083, and by the steel pipe of five coaxial arrangement and corresponding outlet nozzle thereof with regulate the used valve of air quantity wind speed and consisted of.This product is to consist of separately passage by the different gap between each layer sleeve pipe, is called: outer axial flow wind duct, wind coal channel, inner axial flow wind duct, interior choosing stream wind passage and center wind duct.The leading section of each layer airduct all is equipped with corresponding heat resisting steel outlet nozzle or cyclone.
Its weak point is: said burner is in cement production process, when using the lower colm of calorific value, the ignition smooth combustion difficulty, very serious coking phenomenon appears at burner head, have to frequently stop the kiln maintenance, reduce production efficiency and manufacture of cement quality, had a strong impact on the stable operation of cement production enterprise.
The utility model content
The purpose of this utility model provides a kind of Low-rank Coal Burner, use the lower colm of cost, by ignition phase by the center oil gun spray into fuel oil, outer eddy flow wind nozzle sprays into natural gas quick igniting coal dust, form and stablize torch, then both sides start Double layer spiral flow wind inside and outside coal dust, keep smooth combustion and the flexible modulation of pulverized coal flame.
The purpose of this utility model is achieved in that a kind of Low-rank Coal Burner, comprise igniter tube channel and the coaxial outer interior airduct of igniter tube channel that is set in successively from inside to outside, the inward turning airduct, wind coal pipe, the outward turning airduct, outer airduct, described interior airduct outlet air end is connected with interior wind nozzle, interior wind nozzle periphery is arranged with the internal cyclone nozzle successively, wind coal nozzle, the external cyclone nozzle, the exogenous wind nozzle, in described, the external cyclone nozzle is connected to the tornadotron outlet air end, wind coal nozzle is connected to wind coal pipe outlet air end, the exogenous wind nozzle is connected to outer airduct outlet air end, between inward turning airduct and the interior airduct, and the wind deflector that is provided with generation eddy flow wind between outward turning airduct and the wind coal pipe, described interior airduct air intake, in, outward turning airduct air intake, outer airduct air intake all links to each other with air-supply passage, is provided with the grease gun igniting device in the igniter tube channel.
The utility model adopts low heat value coal dust inferior as the course of work of combustion fuel to be: after igniter is lighted torch oil gun, coal dust and natural gas enter through wind coal pipe and outward turning airduct respectively, after both nozzle places are mixed, by the igniter quick igniting, simultaneously, axial wind, inward eddy wind, centre wind is respectively through outer airduct, the inward turning airduct, interior airduct is by separately nozzle output, the oxygen of abundance is provided for the burning of fuel combination, so that mixed fuel firing is more abundant, flame reaches optimal combustion state, when reaching the smooth combustion state in the kiln, close natural gas, spray into a small amount of air and change by the outward turning airduct, be used for regulating flame profile.
Compared with prior art, the beneficial effects of the utility model are: the utility model is passing through low heat value coal dust firing inferior, so that when reducing coal-fired cost, also has preferably fired state, outward turning airduct, wind coal pipe are arranged between the outer airduct and inward turning airduct as a wind efferent duct, so that combustion flame is more easily regulated, improved combustion adaptive; Simultaneously, because coal dust is graininess, quality is larger, the good stability of the eddy flow wind that double-deck tornadotron blows out, both combine, and coal dust can be blowed farther, so that burned flame is elongated, heat generating spot can away from nozzle, reduce the possibility of wind coal nozzle place high-temperature coking; Simultaneously, also increase flame internal reflux district, improved the burning ignition condition, in order to further finish abundant burning; Because air has the characteristic of diffusion, therefore, the inward eddy wind of formation must be positioned at and preferably to abut against wind coal pipe inboard; In addition, inward eddy wind is distributed in the air outside, center, and the center air is formed certain constraint effect, has guaranteed that also the position of center air and coal dust mixed combustion can as far as possible away from nozzle, equally also can avoid the situation of wind coal nozzle place high-temperature coking to occur; Have again, the outward turning airduct is arranged on wind coal pipe periphery, the wind coal is had certain protective effect, play relatively heat insulation effect, avoided because excess Temperature causes the place's coking of wind coal nozzle, guaranteed the stability of burning, so that mixed fuel firing is more abundant; Utilize wind of multichannel output, reduced primary air ratio, and the Secondary Air of the injection high temperature that the high speed shaft of exogenous wind nozzle output aweather can also be a large amount of, guarantee simultaneously preferably flame profile, thereby improved combustion efficiency.
As improvement of the present utility model, the front end of described igniter tube channel stretches out interior airduct, and is folded with the center orifice plate between igniter tube channel and the interior wind nozzle.So that the inside and outside combustion tube can be coaxial.And the flame root can be introduced more high temperature CO
2Gas is to reduce O
2Component.
As improvement of the present utility model, between described internal cyclone nozzle and the wind coal nozzle, be provided with brace rod between wind coal nozzle and the external cyclone nozzle.Strengthen the structural stability of burner, thereby guaranteed combustion stability.
As improvement of the present utility model, be provided with interior step on the described exogenous wind nozzle.So that the exogenous wind nozzle has exceeded the length of all the other nozzles, this position distribution has caused the burning initial stage can form the very extended pattern air-flow of rapid expanding, has guaranteed preferably flame profile.
As improvement of the present utility model, described interior step is connected to external cyclone nozzle periphery, and is evenly distributed with several circular holes on the interior step.Reduced the outer nozzle discharge area, and on the basis that has guaranteed exit momentum, increased the rigidity of flame, reduced primary air flow, the more suction rolled up secondary air flow, strengthened combustion efficiency.
As improvement of the present utility model, the interior step on the described exogenous wind nozzle, external cyclone nozzle, wind coal nozzle, internal cyclone nozzle and the radially coplanar setting of interior wind nozzle.So that burning is more abundant.
As improvement of the present utility model, described each nozzle interior exit is provided with the conical surface.Play wind muzzle velocity of adjusting and swirl strength, accelerated the mixing velocity of fuel and combustion air, and form high temperature recirculation zone at flame kernel, improve burning situation, make burning fully, and form the exteenal reflux air film in flame middle and lower reaches district, protect kliner coating.
As improvement of the present utility model, the corresponding butterfly valve that is provided with airduct in Pressure gauge and the control, tornadotron, the interior intake of outer airduct on the described air-supply passage.In order to wind speed, the air quantity of controlling each air channel nozzle, so that fuel combination can fully burn.
As improvement of the present utility model, described outer airduct periphery is provided with protective sleeve.In order to protect burner, than less wear.
As improvement of the present utility model, described outward turning airduct, wind coal pipe, inward turning airduct, interior airduct are joint pipe structure.This structure easy installation and removal.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is A place enlarged drawing among Fig. 1.
Wherein, wind nozzle, 302 inward turning airducts, 302 ' internal cyclone nozzle, 303 outer airducts, 303 ' exogenous wind nozzle, 4 outward turning airducts, 4 ' external cyclone nozzle, 5 Pressure gauges, 6 butterfly valves, 7 interior steps, 8 brace rods, 9 wind deflectors, 10 center orifice plates, 11 igniters in 1 igniter tube channel, 2 wind coal pipes, 2 ' wind coal nozzle, 3 air-supply passages, the 301 interior airducts, 301 '.
The specific embodiment
Be depicted as a kind of Low-rank Coal Burner such as Fig. 1-2; comprise igniter tube channel 1 and the coaxial outer interior airduct 301 of igniter tube channel 1 that is set in successively from inside to outside; inward turning airduct 302; wind coal pipe 2; outward turning airduct 4; outer airduct 303; described interior airduct 301 outlet air ends are connected with interior wind nozzle 301 '; interior wind nozzle 301 ' periphery is arranged with internal cyclone nozzle 302 ' successively; wind coal nozzle 2 '; external cyclone nozzle 4 '; exogenous wind nozzle 303 '; internal cyclone nozzle 302 ' is connected to inward turning airduct 302 outlet air ends; wind coal nozzle 2 ' is connected to wind coal pipe outlet air end; external cyclone nozzle 4 ' is connected to outward turning airduct 4 outlet air ends; exogenous wind nozzle 303 ' is connected to outer airduct 303 outlet air ends; the front end of igniter tube channel 1 stretches out interior airduct 301; and be folded with center orifice plate 10 between igniter tube channel 1 and the interior wind nozzle 301 '; be provided with the wind deflector 9 that produces eddy flow wind between inward turning airduct 302 and the interior airduct 301; interior airduct 301 air intakes; inward turning airduct 302 air intakes; outer airduct 303 air intakes all link to each other with air-supply passage 3; be provided with igniter 11 in the igniter tube channel 1; between internal cyclone nozzle 302 ' and the wind coal nozzle 2 '; be provided with brace rod 8 between wind coal nozzle 2 ' and the external cyclone nozzle 4 '; be provided with interior step 7 on the exogenous wind nozzle 303 '; interior step 7 is connected to external cyclone nozzle 4 ' periphery; and be evenly distributed with several circular holes on the interior step 7; interior step 7 on the exogenous wind nozzle 303 '; external cyclone nozzle 4 '; wind coal nozzle 2 '; internal cyclone nozzle 302 ' and the radially coplanar setting of interior wind nozzle 301 '; each nozzle interior exit is provided with the conical surface; correspondence is provided with airduct 301 in Pressure gauge 5 and the control on the air-supply passage 3; inward turning airduct 302; the butterfly valve 6 of outer airduct 303 interior intakes; outer airduct 303 peripheries are provided with protective sleeve, outward turning airduct 4; wind coal pipe 2; inward turning airduct 302; interior airduct 301 is joint pipe structure.
During the utility model work, behind the firing point firearm 11, coal dust and natural gas enter through wind coal pipe and outward turning airduct 4 respectively, after both nozzle places are mixed, by igniter 11 quick ignitings and smooth combustion, axial wind, inward eddy wind, centre wind is respectively through outer airduct 303, inward turning airduct 302, interior airduct 301 is by separately nozzle output, the oxygen of abundance is provided for the burning of fuel combination, so that mixed fuel firing is more abundant, flame reaches optimal combustion state, when burning enters stable state, the outward turning airduct stops natural gas and sprays into, and changes to spray into micro-eddy flow wind, with the flexible modulation flame profile.Owing to using low heat value cheap coal inferior, when guaranteeing combustion efficiency, played energy-conservation, as to reduce cost effect, the structural feature of the utility model also guarantees the optimum state of flame calcining.
The utility model is not limited to above-described embodiment; on the basis of the disclosed technical scheme of the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection domain of the present utility model.
Claims (10)
1. Low-rank Coal Burner, it is characterized in that: comprise igniter tube channel and the coaxial outer interior airduct of igniter tube channel that is set in successively from inside to outside, the inward turning airduct, wind coal pipe, the outward turning airduct, outer airduct, described interior airduct outlet air end is connected with interior wind nozzle, interior wind nozzle periphery is arranged with the internal cyclone nozzle successively, wind coal nozzle, the external cyclone nozzle, the exogenous wind nozzle, described internal cyclone nozzle is connected to inward turning airduct outlet air end, wind coal nozzle is connected to wind coal pipe outlet air end, the external cyclone nozzle is connected to outward turning airduct outlet air end, the exogenous wind nozzle is connected to outer airduct outlet air end, between inward turning airduct and the interior airduct, be provided with the wind deflector that produces eddy flow wind between outward turning airduct and the wind coal pipe, described interior airduct air intake, inward turning airduct air intake, outer airduct air intake all links to each other with air-supply passage, is provided with igniter in the igniter tube channel.
2. a kind of Low-rank Coal Burner according to claim 1, it is characterized in that: the front end of described igniter tube channel stretches out interior airduct, and is folded with the center orifice plate between igniter tube channel and the interior wind nozzle.
3. a kind of Low-rank Coal Burner according to claim 1 and 2 is characterized in that: between described internal cyclone nozzle and the wind coal nozzle, be provided with brace rod between wind coal nozzle and the external cyclone nozzle.
4. a kind of Low-rank Coal Burner device according to claim 1 and 2 is characterized in that: be provided with interior step on the described exogenous wind nozzle.
5. a kind of Low-rank Coal Burner according to claim 4, it is characterized in that: described interior step is connected to external cyclone nozzle periphery, and is evenly distributed with several circular holes on the interior step.
6. a kind of Low-rank Coal Burner according to claim 4 is characterized in that: the interior step on the described exogenous wind nozzle, external cyclone nozzle, wind coal nozzle, internal cyclone nozzle and the radially coplanar setting of interior wind nozzle.
7. a kind of Low-rank Coal Burner according to claim 1 and 2, it is characterized in that: described each nozzle interior exit is provided with the conical surface.
8. a kind of Low-rank Coal Burner according to claim 1 and 2 is characterized in that: the corresponding butterfly valve that is provided with airduct in Pressure gauge and the control, inward turning airduct, outward turning airduct, the interior intake of outer airduct on the described air-supply passage.
9. a kind of Low-rank Coal Burner according to claim 1 and 2, it is characterized in that: described outer airduct periphery is provided with protective sleeve.
10. a kind of Low-rank Coal Burner according to claim 1 and 2, it is characterized in that: described outward turning airduct, wind coal pipe, inward turning airduct, interior airduct are joint pipe structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220300801 CN202733886U (en) | 2012-06-26 | 2012-06-26 | Inferior coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220300801 CN202733886U (en) | 2012-06-26 | 2012-06-26 | Inferior coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202733886U true CN202733886U (en) | 2013-02-13 |
Family
ID=47659581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220300801 Expired - Lifetime CN202733886U (en) | 2012-06-26 | 2012-06-26 | Inferior coal burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202733886U (en) |
-
2012
- 2012-06-26 CN CN 201220300801 patent/CN202733886U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |