CN105318330A - Burner and method capable of improving combustion effect of regenerative furnace - Google Patents
Burner and method capable of improving combustion effect of regenerative furnace Download PDFInfo
- Publication number
- CN105318330A CN105318330A CN201410337669.XA CN201410337669A CN105318330A CN 105318330 A CN105318330 A CN 105318330A CN 201410337669 A CN201410337669 A CN 201410337669A CN 105318330 A CN105318330 A CN 105318330A
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- CN
- China
- Prior art keywords
- burner
- combustion
- combustion air
- fuel gas
- throat
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000000694 effects Effects 0.000 title claims abstract description 11
- 230000001172 regenerating effect Effects 0.000 title abstract description 5
- 239000002737 fuel gas Substances 0.000 claims abstract description 36
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003546 flue gas Substances 0.000 claims abstract description 22
- 239000000779 smoke Substances 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims description 18
- 238000005338 heat storage Methods 0.000 claims description 15
- 230000011218 segmentation Effects 0.000 claims description 11
- 238000000605 extraction Methods 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 claims description 2
- 239000012634 fragment Substances 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
A burner and method for improving the combustion effect of regenerative furnace, the burner is made up of air channel heat accumulator, fuel gas channel, combustion air channel, auxiliary channel and burner block; the middle of the burner block is provided with a combustion air channel formed by a straight line section, a gradually reducing section, a throat section and a sectional gradually expanding section, a fuel gas channel is arranged in the combustion air channel, auxiliary channels are uniformly distributed at positions close to the throat section, and the other end of each auxiliary channel is opened at the front end of the burner block. During combustion, the fuel gas and the combustion-supporting air form a negative pressure area and a flue gas flow at the throat part, the flue gas circulation rate is increased, the fuel gas and the fuel gas are matched in an injection effect, and the combustion-supporting air is preheated again while a low-oxygen-containing volume concentration combustion area is formed. The smoke exhaust channel composed of the fuel gas channel, the combustion air channel and the auxiliary channel can increase the smoke exhaust area, thereby realizing the combustion under the environment with lower oxygen content and reducing NOxThe discharge amount is reduced, the heat loss is reduced, and the pressure of a hearth is reduced; meanwhile, the oxidation burning loss of the materials is reduced, and the aims of saving energy and reducing consumption are fulfilled.
Description
Technical field
The invention belongs to industrial furnace technical field, particularly relate to a kind of burner and the method for improving heat accumulating type stove combustion efficiency.
Background technology
Regenerative combustion technology has more significant energy-saving effect compared with conventional heating technique, this technology makes full use of the smoke discharging residual heat of industrial furnace, combustion air can be preheating to more than 1000 DEG C, the flue-gas temperature of discharge is made to drop to less than 200 DEG C, the limit achieving waste heat is recycled, and obtains promote rapidly, apply at industrial furnace combustion field.
The core of regenerative combustion technology not only wants economize energy, fuel also will be made to burn in the gaseous environment lower containing oxygen rate, reduce NO
xdischarge capacity, reduce the pollution to environment.At present, in regenerative combustion technology implementation process, the discharge flue of large spout makes combustion air preheated in high temperature obtain good realization, but fuel also Shortcomings in burning in containing the lower gaseous environment of oxygen rate, the perfect unity both also failing to realize.
At present, many heat storage type combustions adopt high velocity burner, rely on the Entraining Effect of combustion air and fuel gas high-speed jet, make a large amount of combustion product backflow in industrial furnace, reach in dilute combustion region containing oxysome volume concentrations, but the practical application effect of this mode is not fine, because during heat storage type combustion, burner also carry the important task of high-temperature flue gas passing away, for making flue gas discharge in industrial furnace smoothly, burner nozzle size is general larger, and should have larger spouting velocity as high velocity burner, so extremely both difficulties are taken into account.In addition, the flue gas that high-speed jet is entrainmented is usually and the partial air at jet boundary place mixes, in industrial furnace, the air of most of combustion zone is not diluted, oxygen concentration is still very high, fuel can not be made well to burn, when effluxvelocity hour this problem is particularly evident in the gaseous environment lower containing oxygen rate.
Summary of the invention
Object of the present invention aims to provide one and can be formed low containing oxysome volume concentrations combustion zone, high-temperature flue gas can be made again to discharge smoothly, thus effectively improve burner and the method for heat accumulating type stove combustion efficiency.
For this reason, the solution that the present invention takes is:
Improve a burner for heat accumulating type stove combustion efficiency, it is characterized in that, be made up of air duct heat storage, fuel gas passageway, combustion air passage, accessory channel and burner block; Combustion air passage is provided with in the middle of the burner block that square body refractory brick is formed, combustion air passage forms the multistage extendible structure of straightway, converging transition, throat, segmentation divergent segment, middle part is the minimum throat of diameter, be segmentation divergent segment on front side of throat, on rear side of throat, connect straightway by converging transition; Concentricly straight-run of pipe shape fuel gas passageway is provided with in combustion air passage, fuel gas passageway front end spout stretches in the first divergent segment of combustion air Channel fragment divergent segment, in combustion air passages section, be equiped with hollow air duct heat storage, air duct heat storage is wrapped in outside fuel gas passageway; Circumferentially be evenly equipped with at least two circular pipe type accessory channels perpendicular to combustion air passage axis along combustion air passage converging transition near place of throat, accessory channel turn back in burner block after the other end be opened on the front end of burner block.
The throat diameter D of described combustion air passage is 130 ~ 200mm.
The taper angle α of described combustion air passage converging transition is 30 ° ~ 120 °, and the angle of flare β of segmentation divergent segment first expansion segment is 10 ° ~ 90 °, and the angle of flare γ of the second expansion segment is 10 ° ~ 60 °.
The distance of described fuel gas passageway front end spout and combustion air passage throat front end is 20 ~ 60mm.
Be communicated with the axis of accessory channel on combustion air passage converging transition and the distance of combustion air passage throat rear end is 10 ~ 20mm.
Described accessory channel is 2 ~ 6.
Improve a method for heat accumulating type stove combustion efficiency, it is characterized in that, apply above-mentioned burner and improve the concrete grammar of heat accumulating type stove combustion efficiency and process is:
In process of production, when burner is in fired state, fuel gas is entered by burner fuel gas passageway; Combustion air is through air duct heat storage, entered by burner combustion air passage, utilize pressure energy to dynamic transformation of energy in throat, form negative pressuren zone, because there is the accessory channel with burner hearth UNICOM at place of nearly throat, when combustion air is by inhaling volume a large amount of flue gas during convergent-divergent passage throat, form flue gas stream, increase flue gas recycling rate, and match with the ejector action of fuel gas, on the one hand, the combustion air of ejection fully mixes with suction cigarette air-flow, ensure that combustion air is just diluted before combustion, formed low containing oxysome volume concentrations combustion zone; On the other hand, the flue gas inhaling volume, to combustion air preheating again, serves the effect making full use of waste heat, makes hearth combustion more stable, more uniform temperature simultaneously; When burner is in smoke evacuation state, because of the suction of air-introduced machine, burner fuel gas passageway, combustion air passage and accessory channel all will become discharge flue, because of adding of accessory channel, increase the smoke extraction area of burner, thus both ensure that effect was rolled up in the suction that combustion air and fuel gas spray at a high speed, reduce flame high-temperature region NO
xgeneration, improve combustion efficiency; Simultaneously when not increasing blower fan power consumption, by increasing smoke extraction area, flue gas can be discharged smoothly, reducing furnace pressure.
Beneficial effect of the present invention is:
1. utilize the repeats itself of high-temperature flue gas to improve the burning condition of industrial furnace, realize containing oxygen rate compared with the burning under low environment, can NO be reduced
xcontent 5%, thus reduce NO
xdischarge capacity;
2. reduce the exhaust gas volumn that burning produces, reduce the heat loss due to exhaust gas of industrial furnace, exhaust smoke level 20% can be increased, effectively reduce furnace pressure;
3. reduce the oxygen concentration of industrial furnace environment, reduce the oxidization burning loss of heating object material, reach energy-saving and cost-reducing object.
Accompanying drawing explanation
Fig. 1 is nozzle structure generalized section;
Fig. 2 is the A-A sectional view of Fig. 1.
In figure: air duct heat storage 1, fuel gas passageway 2, combustion air passage 3, accessory channel 4, burner block 5.The meaning representated by related symbol relating to combustion air passage 3 is: throat diameter D; The taper angle α of converging transition; Segmentation divergent segment first expansion segment angle of flare γ, the second expansion segment angle of flare β.
Detailed description of the invention
From accompanying drawing, the burner system that the present invention can improve heat accumulating type stove combustion efficiency is made up of air duct heat storage 1, fuel gas passageway 2, combustion air passage 3, accessory channel 4 and burner block 5.Burner block entirety is square body, employing refractory brick is made, combustion air passage 3 is provided with in the centre of burner block 5, combustion air passage 3 is the multistage extendible structure be made up of straightway, converging transition, throat, segmentation divergent segment, it is the minimum throat of diameter in the middle part of it, be segmentation divergent segment on front side of throat, segmentation divergent segment is divided into the first expansion segment and the second expansion segment; Being converging transition on rear side of throat, is straightway on rear side of converging transition.In combustion air passage 3, the fuel gas passageway 2 that be provided with straight-run of pipe shape concentric on combustion air passage 3, the front end spout of fuel gas passageway 2 stretches in the first divergent segment of combustion air passage 3 segmentation divergent segment; In combustion air passage 3 straightway, be equiped with hollow air duct heat storage 1, air duct heat storage 1 is wrapped in the outside of fuel gas passageway 2; That locates along combustion air passage 3 converging transition near throat is circumferentially evenly equipped with 4 circular pipe type accessory channels 4 perpendicular to combustion air passage 3 axis, and after accessory channel 4 is turned back in burner block 5, the other end is opened on the front end of burner block 5.
For air single-preheating heat accumulating type stove, if when single burner ability is 600Nm3/h, throat diameter D is 148mm, and the taper angle α of converging transition is 60 °, the first expansion segment angle of flare γ be 45 °, the angle of flare β of the second expansion segment is 30 °; The distance of burner fuel gas passageway 2 front end spout and combustion air passage 3 throat section is 35mm; Accessory channel 4 Single port is in combustion air passage 3 converging transition, and be 12mm with the distance of throat section, the diameter of 4 accessory channels 4 is 20mm, is equidistantly distributed on combustion air passage 3 converging transition ringwise near place of throat circumferentially.
In process of production, when burner is in fired state, fuel gas is entered by fuel gas passageway 2; Combustion air is through air duct heat storage 1, entered by burner combustion air passage 3, utilize pressure energy to dynamic transformation of energy in throat, form negative pressuren zone, because there is the accessory channel 4 with burner hearth UNICOM in throat, when combustion air is by inhaling volume a large amount of flue gas during convergent-divergent passage throat, forms flue gas stream, increase flue gas recycling rate.When burner is in smoke evacuation state, because of the suction of air-introduced machine, fuel nozzle gas passage 2, combustion air passage 3 and accessory channel 4 all will become discharge flue, due to adding of accessory channel 4, increase the smoke extraction area of burner.Thus both ensure that effect was rolled up in the suction that combustion air and fuel gas spray at a high speed, reduce flame high-temperature region NO
xgeneration, improve combustion efficiency; Simultaneously when not increasing blower fan power consumption, flue gas can be discharged smoothly, reducing furnace pressure.
Claims (7)
1. can improve a burner for heat accumulating type stove combustion efficiency, it is characterized in that, be made up of air duct heat storage, fuel gas passageway, combustion air passage, accessory channel and burner block; Combustion air passage is provided with in the middle of the burner block that square body refractory brick is formed, combustion air passage forms the multistage extendible structure of straightway, converging transition, throat, segmentation divergent segment, middle part is the minimum throat of diameter, be segmentation divergent segment on front side of throat, on rear side of throat, connect straightway by converging transition; Concentricly straight-run of pipe shape fuel gas passageway is provided with in combustion air passage, fuel gas passageway front end spout stretches in the first divergent segment of combustion air Channel fragment divergent segment, in combustion air passages section, be equiped with hollow air duct heat storage, air duct heat storage is wrapped in outside fuel gas passageway; Circumferentially be evenly equipped with at least two circular pipe type accessory channels perpendicular to combustion air passage axis along combustion air passage converging transition near place of throat, accessory channel turn back in burner block after the other end be opened on the front end of burner block.
2. the burner improving heat accumulating type stove combustion efficiency according to claim 1, is characterized in that, the throat diameter D of described combustion air passage is 130 ~ 200mm.
3. the burner improving heat accumulating type stove combustion efficiency according to claim 1, it is characterized in that, the taper angle α of described combustion air passage converging transition is 30 ° ~ 120 °, the angle of flare β of segmentation divergent segment first expansion segment is 10 ° ~ 90 °, and the angle of flare γ of the second expansion segment is 10 ° ~ 60 °.
4. the burner improving heat accumulating type stove combustion efficiency according to claim 1, is characterized in that, the distance of described fuel gas passageway front end spout and combustion air passage throat front end is 20 ~ 60mm.
5. the burner improving heat accumulating type stove combustion efficiency according to claim 1, is characterized in that, is communicated with the axis of the accessory channel on combustion air passage converging transition and the distance of combustion air passage throat rear end is 10 ~ 20mm.
6. the burner improving heat accumulating type stove combustion efficiency according to claim 1, is characterized in that, described accessory channel is 2 ~ 6.
7. application rights requires the method can improving the burner of heat accumulating type stove combustion efficiency described in 1, and it is characterized in that, concrete grammar and the process of improving heat accumulating type stove combustion efficiency are:
In process of production, when burner is in fired state, fuel gas is entered by burner fuel gas passageway; Combustion air is through air duct heat storage, entered by burner combustion air passage, utilize pressure energy to dynamic transformation of energy in throat, form negative pressuren zone, because there is the accessory channel with burner hearth UNICOM at place of nearly throat, when combustion air is by inhaling volume a large amount of flue gas during convergent-divergent passage throat, form flue gas stream, increase flue gas recycling rate, and match with the ejector action of fuel gas, on the one hand, the combustion air of ejection fully mixes with suction cigarette air-flow, ensure that combustion air is just diluted before combustion, formed low containing oxysome volume concentrations combustion zone; On the other hand, the flue gas inhaling volume, to combustion air preheating again, serves the effect making full use of waste heat, makes hearth combustion more stable, more uniform temperature simultaneously; When burner is in smoke evacuation state, because of the suction of air-introduced machine, burner fuel gas passageway, combustion air passage and accessory channel all will become discharge flue, because of adding of accessory channel, increase the smoke extraction area of burner, thus both ensure that effect was rolled up in the suction that combustion air and fuel gas spray at a high speed, reduce flame high-temperature region NO
xgeneration, improve combustion efficiency; Simultaneously when not increasing blower fan power consumption, by increasing smoke extraction area, flue gas can be discharged smoothly, reducing furnace pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410337669.XA CN105318330A (en) | 2014-07-16 | 2014-07-16 | Burner and method capable of improving combustion effect of regenerative furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410337669.XA CN105318330A (en) | 2014-07-16 | 2014-07-16 | Burner and method capable of improving combustion effect of regenerative furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105318330A true CN105318330A (en) | 2016-02-10 |
Family
ID=55246305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410337669.XA Pending CN105318330A (en) | 2014-07-16 | 2014-07-16 | Burner and method capable of improving combustion effect of regenerative furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105318330A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131672A (en) * | 2018-02-13 | 2018-06-08 | 项玮 | The low nitrogen nitride flat flame heat-accumulating burner of industrial furnace |
| CN108980831A (en) * | 2018-08-22 | 2018-12-11 | 佛山市科皓燃烧设备制造有限公司 | A kind of ultralow NOxHeat-accumulating burner |
| CN109539252A (en) * | 2018-12-28 | 2019-03-29 | 中冶京诚(扬州)冶金科技产业有限公司 | A kind of high velocity burner |
| CN109668146A (en) * | 2018-12-26 | 2019-04-23 | 佛山市德力泰科技有限公司 | A kind of energy-saving thermal storage formula burning composite structure and the stove based on the composite structure |
| CN111412485A (en) * | 2020-04-28 | 2020-07-14 | 湖南中冶长天节能环保技术有限公司 | Low-nitrogen combustion equipment and air material supply device thereof |
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| CN202521609U (en) * | 2012-03-15 | 2012-11-07 | 哈尔滨金鑫电气有限责任公司 | Multi-functional heat storage type impulse burner |
| CN202813377U (en) * | 2012-08-06 | 2013-03-20 | 闻喜县白玉矿业有限公司 | Gas heat accumulating type burner structure with igniter |
| CN103206708A (en) * | 2013-03-20 | 2013-07-17 | 洛阳腾节炉业科技有限公司 | Heat accumulating type burner |
| CN203628646U (en) * | 2013-12-07 | 2014-06-04 | 黄冈市中洲安达热工设备有限公司 | Light combustion-supporting wind and combustion gas integrated heat storing burner |
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2014
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| CN200972119Y (en) * | 2006-11-24 | 2007-11-07 | 中钢集团鞍山热能研究院 | Super-energy-saving thermal storage burner |
| CN101900333A (en) * | 2010-07-22 | 2010-12-01 | 黄晓华 | High-temperature low-oxygen burner |
| CN202521609U (en) * | 2012-03-15 | 2012-11-07 | 哈尔滨金鑫电气有限责任公司 | Multi-functional heat storage type impulse burner |
| CN202813377U (en) * | 2012-08-06 | 2013-03-20 | 闻喜县白玉矿业有限公司 | Gas heat accumulating type burner structure with igniter |
| CN103206708A (en) * | 2013-03-20 | 2013-07-17 | 洛阳腾节炉业科技有限公司 | Heat accumulating type burner |
| CN203628646U (en) * | 2013-12-07 | 2014-06-04 | 黄冈市中洲安达热工设备有限公司 | Light combustion-supporting wind and combustion gas integrated heat storing burner |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131672A (en) * | 2018-02-13 | 2018-06-08 | 项玮 | The low nitrogen nitride flat flame heat-accumulating burner of industrial furnace |
| CN108131672B (en) * | 2018-02-13 | 2024-03-12 | 项玮 | Low-nitride flat flame heat accumulating type burner of industrial furnace |
| CN108980831A (en) * | 2018-08-22 | 2018-12-11 | 佛山市科皓燃烧设备制造有限公司 | A kind of ultralow NOxHeat-accumulating burner |
| CN109668146A (en) * | 2018-12-26 | 2019-04-23 | 佛山市德力泰科技有限公司 | A kind of energy-saving thermal storage formula burning composite structure and the stove based on the composite structure |
| CN109539252A (en) * | 2018-12-28 | 2019-03-29 | 中冶京诚(扬州)冶金科技产业有限公司 | A kind of high velocity burner |
| CN111412485A (en) * | 2020-04-28 | 2020-07-14 | 湖南中冶长天节能环保技术有限公司 | Low-nitrogen combustion equipment and air material supply device thereof |
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| PB01 | Publication | ||
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Application publication date: 20160210 |