CN109140434A - A kind of Multi-stage spiral coal burner - Google Patents
A kind of Multi-stage spiral coal burner Download PDFInfo
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- CN109140434A CN109140434A CN201811159355.XA CN201811159355A CN109140434A CN 109140434 A CN109140434 A CN 109140434A CN 201811159355 A CN201811159355 A CN 201811159355A CN 109140434 A CN109140434 A CN 109140434A
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- Prior art keywords
- air
- supply tube
- air supply
- stage spiral
- coal burner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to a kind of Multi-stage spiral coal burners, belong to field of combustion technology.Including an air supply tube, one time air supply tube tail end connects stable flame cover, stable flame cover is embedded in hot-blast stove, the interior wind wing of certain angle is equipped in air supply tube, play cyclonic action, there are also diffusing cones at the center of air supply tube, and the control by being connected to external adjusting handle is moved in stable flame cover；It further include secondary blast pipe, the Secondary Air in secondary blast pipe is mixed in the tail portion of an air supply tube with the coal dust in an air supply tube and First air after passing through interior wind wing eddy flow；It further include air supply tube three times, the tertiary air in air supply tube mixes in stable flame cover after interior wind wing eddy flow with First air, Secondary Air three times.This product improves coal dust burn-off rate, generally can reach 99.5% or more.Denitrification rate can reach 30%~45% or more.
Description
Technical field
The present invention relates to a kind of Multi-stage spiral coal burners, belong to field of combustion technology.
Background technique
Hot-blast stove be applied to every profession and trade, such as: cement plant, Bricks and Tiles Plant, glass factory raw material stoving production line；Steel plant's circulation
Economic blast furnace granulated slag miberal powder prepares drying production line and Iron Ore Powder pelletizing drying production line；Coal chemical industry lignite transformation dryness is raw
Producing line.Coal chemical industry fine purifiation bituminous coal is dry, pyrolysis, produces semicoke, coal tar, Gas Production line.Calcine production line in limekiln；Ceramics
Factory's raw material prepare spray drying tower, and pulverized coal hot air furnace drying production line etc. and other industrial materials are dry, pyrolysis, calcine
Required hot-blast stove production line.
In the matched pulverized coal hot air furnace of these drying production lines, one of key equipment is exactly coal burner.
Coal burner due to the industry that uses is different and difference, but rough working principle such as coal dust firing is former
Reason, air distribution principle are consistent.The R&D and promotion of coal burner is not attached great importance to before 2000 early in China.Invention
People and place company have witnessed the historical process of China's coal dust firing in the past 30 years substantially.First generation coal burner is only monotubular
Structure, the interior installation of cylinder generate certain whirlwind fin composition, far from Combustion Efficiency of Coal Powder problem.All universities are related
It is not also introduced in burning teaching material or design manual.Second generation coal burner at the beginning of 2000, is researched and developed successfully by inventor
Double rotational flow powdered coal burner started to come out, and gradually be applied to market, achieve users be widely recognized as and favorable comment.
But the burner is only used for bituminous coal or lignite burning.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of Multi-stage spiral coal burners.
A kind of Multi-stage spiral coal burner, including an air supply tube, one time air supply tube tail end connects stable flame cover, stable flame cover
It is embedded in hot-blast stove, the interior wind wing of certain angle is equipped in an air supply tube, play cyclonic action, an air supply tube
Center there are also diffusing cone, the control by being connected to external adjusting handle is moved in stable flame cover；
It further include secondary blast pipe, the Secondary Air in secondary blast pipe passes through the tail after interior wind wing eddy flow in an air supply tube
Portion in an air supply tube coal dust and First air mix；
Further include air supply tube three times, three times the tertiary air in air supply tube after interior wind wing eddy flow with First air, Secondary Air
It is mixed in stable flame cover.
The First air is pumped into, the air of pulverized coal conveying from wind of delivering coal by high pressure blower.
Secondary Air comes from air.
Circulating flue gas of the tertiary air from hot wind outlet of still, wherein oxygen volume content is 6-9%.
The present invention is the low O of the low NOx of third generation high-efficiency environment protection energy-saving type2Series type Multi-stage spiral coal burner, in coal
It is applied on powder hot-blast stove.The product major function other than further increasing coal dust burn-off rate, and adapts to more simultaneously
Coal fuel, such as anthracite, bituminous coal, brown burning of coal.Its fineness of pulverized coal can have different requirements because of different types of coal.
With the process of historical time, environmental requirement is continuously improved.This product also has out of stock environment-friendly function.That is: logical
Flue gas recirculation combustion technology, multistage air distribution technology and redox combustion technology are crossed, to reach preliminary out of stock in furnace and create
Make good burning basis.Also thus continuous to improve coal dust burn-off rate, it generally can reach 99.5% or more.Denitrification rate can reach
30%~45% or more.
Detailed description of the invention
Fig. 1, Multi-stage spiral coal burner structural schematic diagram.
Fig. 2, multistage air-supply schematic diagram.
1- level-one air supply tube, 2- second level air supply tube, 3- three-level air supply tube, 4- stable flame cover, wind wing in 5-, 6- diffusing cone, 7-
Adjusting handle.
Specific embodiment
As shown in Figure 1, a kind of Multi-stage spiral coal burner, including an air supply tube, an air supply tube tail end connection are steady
Flame cover, stable flame cover are embedded in hot-blast stove, and the interior wind wing of certain angle is equipped in an air supply tube, play cyclonic action, institute
Stating the center of an air supply tube, there are also diffusing cones, and the control by being connected to external adjusting handle is moved in stable flame cover；
It further include secondary blast pipe, the Secondary Air in secondary blast pipe passes through the tail after interior wind wing eddy flow in an air supply tube
Portion in an air supply tube coal dust and First air mix；
Further include air supply tube three times, three times the tertiary air in air supply tube after interior wind wing eddy flow with First air, Secondary Air
It is mixed in stable flame cover.
The First air is pumped into, the air of pulverized coal conveying from wind of delivering coal by high pressure blower.
Secondary Air comes from air.
Circulating flue gas of the tertiary air from hot wind outlet of still, wherein oxygen volume content is 6-9%.
Wind once deliver coal by breeze atomizing device, under the impetus of high-pressure frequency-conversion blower, into coal burner.?
The primary air-supply tube hub of coal burner, the diffusing cone equipped with certain angle.Equipped with certain angle in an air supply tube
Interior wind wing.For pulverized coal flow under the action of Liang Zhong mechanism, swirling eddy at an angle pours the stable flame cover of burner head.?
Under the action of Secondary Air, by Secondary Air eddy flow, fierce wind is formed in burner, mixes state in coal.In coal burner
Outlet form hollow flame, and generate a certain range of negative pressuren zone.Coal, wind proportion are coefficient of excess air less than 1.Generate
Reduction reaction generates a large amount of combustible；Its formula is
Tertiary air, that is, circulating flue gas (O26%~10%) (Fig. 2).This low O2Flue gas in, also containing a small amount of CO ↑ with
H2↑ wait fuel gas；When this circulating flue gas is wrapped in the diffusion flame of primary and secondary air composition of rotating Vortex, make to revolve in the same direction
The circulating flue gas turned, mutually fierce collision and the rotation that intersects.More fierce low-temperature reduction reaction is generated, can produce
A large amount of fuel gas.Productive experiment is learnt: the black duration and degree of heating of its burner outlet is slightly longer, and kermesinus is presented.
When this fire smoke gases stream entrainment of a large amount of fuel gas, into hot-blast stove, the centre of hot-blast stove can introduce double
Layer eddy flow fresh air layer (i.e. the 4th wind), that is, can produce strong oxidation reaction, and generate a large amount of high temperature exothermic reaction.
Flue gas stream also substantially prolongs residence time of the coal dust in furnace simultaneously.High-temperature flue-gas at this time is up to 1250 DEG C.In furnace
The exhaust gas dust of flue gas stream has been in semi-molten state.A large amount of exhaust gas dust is under the effect of rotary wind centrifugal force, and almost 95%
Above exhaust gas dust is thrown to inboard wall of furnace body.Under the result of flue dust fierceness collision, soot dust granule is become larger；As " rolling snow
Ball " equally, is covered in furnace on the surface of refractory material, is rolled down naturally after reaching constant weight, into slag removing system.By
In covering certain thickness lime-ash on refractory material, while refractory material can also be played a certain protective role, and extends
The service life of refractory material.The four wind rotation dynamics and air quantity of the double-deck whirlwind layer, have to grasp, otherwise meeting in furnace
Coking, and then there is the safety accident of slagging.At this point, coal dust burn-off rate has progressivelyed reach 99.5% or more.
To the anchracite duff for being difficult to after-flame, other than fineness of pulverized coal to be increased, also to increase again in the mixing chamber of hot-blast stove
Add five Double layer rotating wind.Further to extend the residence time of coal dust firing and the further degree of mixing of flue gas and air.Together
When, also selective non-catalytic agent denitrification apparatus (SNCR) is connected in whirlwind mouth.At this point, spraying into the temperature window of ammonium hydroxide or urea
The time of (1050~830 DEG C), flue gas and ammonium hydroxide or urea degree of mixing and reduction reaction be out of stock reduction reaction section most
Best placement.Its denitrification rate is up to 85% or more.Good management system is such as added, it should not ask that denitrification rate, which reaches 90% or more,
Topic.
The problem of flue gas desulfurization, can mix a certain proportion of pulverized limestone in coal dust.This flue gas desulphuization rate can only achieve
30% or so.Desulfurizer is handled after can setting furnace.
Claims (7)
1. a kind of Multi-stage spiral coal burner, which is characterized in that including an air supply tube, one time air supply tube tail end connects steady flame
Cover, stable flame cover are embedded in hot-blast stove, and the interior wind wing of certain angle is equipped in an air supply tube, play cyclonic action, described
There are also diffusing cones at the center of air supply tube, and the control by being connected to external adjusting handle is moved in stable flame cover；
Further include secondary blast pipe, the Secondary Air in secondary blast pipe pass through interior wind wing eddy flow after an air supply tube tail portion with
Coal dust and First air mixing in air supply tube；
Further include air supply tube three times, three times the tertiary air in air supply tube after interior wind wing eddy flow with First air, Secondary Air steady
It is mixed in flame cover.
2. Multi-stage spiral coal burner according to claim 1, which is characterized in that the First air comes from and delivers coal
Wind is pumped by high pressure blower, the air of pulverized coal conveying.
3. Multi-stage spiral coal burner according to claim 1 or 2, which is characterized in that Secondary Air comes from air.
4. Multi-stage spiral coal burner according to claim 1 or 2, which is characterized in that tertiary air goes out from hot-blast stove
The circulating flue gas of mouth, wherein oxygen volume content is 6-9%.
5. Multi-stage spiral coal burner according to claim 1 or 2, which is characterized in that the centre of hot-blast stove can introduce
Double layer spiral flow fresh air layer, as four wind.
6. Multi-stage spiral coal burner according to claim 1 or 2, which is characterized in that hot-blast stove mixing chamber again
Increase by five Double layer rotating wind.
7. Multi-stage spiral coal burner according to claim 6, which is characterized in that in the whirlwind of five Double layer rotating wind
Mouth connection selective non-catalytic agent denitrification apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811159355.XA CN109140434A (en) | 2018-09-30 | 2018-09-30 | A kind of Multi-stage spiral coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811159355.XA CN109140434A (en) | 2018-09-30 | 2018-09-30 | A kind of Multi-stage spiral coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109140434A true CN109140434A (en) | 2019-01-04 |
Family
ID=64814215
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811159355.XA Pending CN109140434A (en) | 2018-09-30 | 2018-09-30 | A kind of Multi-stage spiral coal burner |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011106726A (en) * | 2009-11-17 | 2011-06-02 | Ihi Corp | Pulverized coal burner |
| CN103062764A (en) * | 2013-01-25 | 2013-04-24 | 福建永恒能源管理有限公司 | Low-nitrogen powder fuel burner |
| CN203718768U (en) * | 2014-01-20 | 2014-07-16 | 武汉奥杰科技发展有限责任公司 | High-efficiency and energy-saving adjustable-type multi-coal-type pulverized coal burner |
| CN203824074U (en) * | 2013-11-22 | 2014-09-10 | 晋江美创环保设备有限公司 | Hot air furnace with combustor at bottom |
| CN108361692A (en) * | 2018-04-24 | 2018-08-03 | 徐州科能燃烧控制科技有限公司 | A kind of Industrial Boiler coal burner |
-
2018
- 2018-09-30 CN CN201811159355.XA patent/CN109140434A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011106726A (en) * | 2009-11-17 | 2011-06-02 | Ihi Corp | Pulverized coal burner |
| CN103062764A (en) * | 2013-01-25 | 2013-04-24 | 福建永恒能源管理有限公司 | Low-nitrogen powder fuel burner |
| CN203824074U (en) * | 2013-11-22 | 2014-09-10 | 晋江美创环保设备有限公司 | Hot air furnace with combustor at bottom |
| CN203718768U (en) * | 2014-01-20 | 2014-07-16 | 武汉奥杰科技发展有限责任公司 | High-efficiency and energy-saving adjustable-type multi-coal-type pulverized coal burner |
| CN108361692A (en) * | 2018-04-24 | 2018-08-03 | 徐州科能燃烧控制科技有限公司 | A kind of Industrial Boiler coal burner |
Non-Patent Citations (1)
| Title |
|---|
| 潘永康等: "《现代干燥技术 第二版》", 31 December 2006 * |
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Application publication date: 20190104 |
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