CN103924022B - Combustor with coal gas and air premixed grills to achieve spray, backflow, preheating and combustion - Google Patents
Combustor with coal gas and air premixed grills to achieve spray, backflow, preheating and combustion Download PDFInfo
- Publication number
- CN103924022B CN103924022B CN201410198735.XA CN201410198735A CN103924022B CN 103924022 B CN103924022 B CN 103924022B CN 201410198735 A CN201410198735 A CN 201410198735A CN 103924022 B CN103924022 B CN 103924022B
- Authority
- CN
- China
- Prior art keywords
- gas
- air
- premix
- combustion chamber
- wall
- Prior art date
- 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.)
- Active
Links
Abstract
The invention relates to a combustor with coal gas and air premixed grills to achieve spray, backflow, preheating and combustion. The problems that the speed for mixing coal gas and air is low, the coal gas and the air are mixed unevenly, the combustion intensity is low, combustion is incomplete, the combustion space of a combustion chamber is large, and the structure of a combustor is not reasonable are effectively solved. The wall of a combustion chamber is provided with an air inlet pipe and a coal gas inlet pipe. The air inlet pipe and the coal gas inlet pipe are connected with an air distribution channel and a coal gas distribution channel. The coal gas and air premixed grills are arranged between the coal gas distribution channel and the air distribution channel. The coal gas and air premixed grills are communicated with inlets of premixed gas spray channels. Outlets of the premixed gas spray channels are communicated with the portion, inside the wall, of the combustion chamber. The combustor has the advantages that the combustion intensity is high, combustion is stable, fuel is saved, investment is saved, the temperature of exhaust gas is lowered, the emission amount of harmful gas is reduced, and environment pollution is reduced.
Description
Technical field
The present invention relates to the burner of blast funnace hot blast stove, especially for the burner of a kind of coal gas and air grid premix spray back preheated burning that provide the hotblast stove of high temperature blast for blast furnace.
Background technology
Current, blast funnace hot blast stove is considered to require under lower heat of combustion blast furnace gas, obtain high-performance and high wind-warm syndrome from energy-saving and cost-reducing, and finally reach efficiently, energy-saving and environmental protection, volume increase object.For this reason, the combustion processes that must realize optimizing in hotblast stove combines with the heat transfer process of strengthening boiler flow field.This just relates to the tissue of the structure of combustion unit, heat storage body structure and layout and air velocity distribution, especially the Structure and Properties of burner is particularly crucial on the impact of hotblast stove, make a general survey of the burner of the various blast funnace hot blast stoves used at present, all mix in combustion space with air based on coal gas, preheating, ignition pattern, the problems such as this pattern always exists mixing inequality, incomplete combustion, the bags is large, burner structure selection is improper; This just causes in combustion chamber, and the changing features of combustion gas flowing is large, air-flow is unstable, intensity of combustion is low, and then causes air flow method in regenerator uneven, reduces the utilization ratio of heat-transfer effect and heat storage; Because the structure of heat storage is all difficult to choose according to flow field structure and load condition with layout, thus the performance of entire effect hotblast stove and practical effect.Therefore, along with people are to the theory of burning, heat and mass, fluid flowing and the raising of utilisation technology understanding thereof and the going deep into of application practice, and iron-smelting process attention with environmental protection efficient, energy-conservation for the demand and metallurgy industry of stablizing high wind-warm syndrome, it is imperative to improve the burner in hotblast stove field.
Summary of the invention
For above-mentioned situation, for overcoming prior art defect, the invention provides the burner of a kind of coal gas and air grid premix spray back preheated burning, can effectively solve coal gas and air mixed speed is low, uneven, intensity of combustion is low, incomplete, the bags is large and the irrational problem of burner structure.
The technical solution used in the present invention is, comprise combustion chamber body of wall, combustion chamber, air intake duct, gas inlet pipe, air distribution channel, gas allocation passage, gas-air premix grid and premix gas jet passage, combustion chamber body of wall is made up of together with the tubular wall connecting of lower vertical top vault, the internal space of combustion chamber body of wall is combustion chamber, on the tubular body of wall of combustion chamber body of wall, its axis vertical has been staggeredly arranged air intake duct and gas inlet pipe from top to bottom, air intake duct and gas inlet pipe are vertically connected the air distribution channel and gas allocation passage of building by laying bricks or stones in the body of wall of combustion chamber respectively, the gas-air premix grid be made up of staggered gap jet pipe is had between the bottom of gas allocation passage and the top of air distribution channel, the inlet communication of gas-air premix grid and premix gas jet passage, the outlet of premix gas jet passage upwards with combustion chamber.
The present invention is the mend gene done on existing hot-blast stove gas burner architecture basics, the coal gas of grating guides the combustion unit of the backflow preheat of gas fume of combustion chamber to design with the premix mode of air in conjunction with premix gas jet, effectively realize burning with high strength backflow preheat mixing fast and uniformly of Combustion of Hot Air Furnace device, effectively improve the stability of intensity of combustion and burning.Hotblast stove adopts this burner just can ensure efficient, the high-heat strength of hotblast stove under safety and stablization prerequisite and the operation of high wind pushing temperature, then reach the quantity discharged of fuel saving, investment reduction, reduction spent air temperture and obnoxious flavour, reduce the good result of environmental pollution.
Accompanying drawing explanation
Fig. 1 is sectional front view of the present invention.
Fig. 2 is A-A sectional view in Fig. 1 of the present invention.
Fig. 3 is the B direction view of Fig. 1 of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As Fig. 1, shown in Fig. 2 and Fig. 3, structure of the present invention comprises combustion chamber body of wall 1, combustion chamber 2, air intake duct 3, gas inlet pipe 4, air distribution channel 5, gas allocation passage 6, gas-air premix grid 7 and premix gas jet passage 8, combustion chamber body of wall 1 is made up of together with the tubular wall connecting of lower vertical top vault, the internal space of combustion chamber body of wall is combustion chamber 2, on the tubular body of wall of combustion chamber body of wall 1, its axis vertical has been staggeredly arranged air intake duct 3 and gas inlet pipe 4 from top to bottom, air intake duct 3 and gas inlet pipe 4 are vertically connected the air distribution channel 5 and gas allocation passage 6 of building by laying bricks or stones in the body of wall of combustion chamber respectively, the gas-air premix grid 7 be made up of staggered gap jet pipe is had between the bottom of gas allocation passage 6 and the top of air distribution channel 5, the inlet communication of gas-air premix grid and premix gas jet passage 8, the outlet of premix gas jet passage 8 upwards with combustion chamber.
Described combustion chamber body of wall 1 be metal shell inwall is built by laying bricks or stones high temperature resistant 1300 DEG C ~ 1500 DEG C refractory masses form, the skin that the internal layer that resistant to elevated temperatures refractory masses is made up of the strong andaluzite high alumina brick of heat-shock resistance or dichroite-mullite brick, lightweight refractory are formed, and the ceramic fiber cotton of outer outside and sprayed coating combine the composite structure of formation from the inside to the outside successively.
Described air intake duct 3 and gas inlet pipe 4 are the circular passages of building high alumina brick or clay brick formation on inner wall of metal tube by laying bricks or stones, and air intake duct 3 and gas inlet pipe 4 are vertically connected on the air distribution channel 5 of being built by laying bricks or stones by andaluzite high alumina brick of the square-section be arranged in combustion chamber body of wall 1 and the outside body of wall of gas allocation passage 6 respectively.
Described gas-air premix grid 7 to interlock at least two-layer extraction hole in the top of combination formation level and bottom for brick body, the extraction hole on top is coal gas grate opening, the extraction hole of bottom is air grid hole, and the exit end of gas-air premix grid is communicated with the entrance end level of premix gas jet passage 8.
Described premix gas jet passage 8 is the groove of upper opening, and upper opening is outlet, and tilt upward and combustion chamber, angle of inclination is the angle 60 ~ 90 ° of premix gas jet passage and combustion chamber horizontal plane.
Described premix gas jet passage 8 is for be made up of andaluzite high alumina brick or dichroite-mullite brick masonry.
During enforcement, coal gas enters gas-air premix grid 7 by the bottom of gas allocation passage 6 in the burner, and enter premix gas jet passage 8 from its staggered hole, air enters gas-air premix grid 7 by the top of air distribution channel 5, and enter premix gas jet passage 8 from its staggered hole, here coal gas effectively mixes fully with even air, then tilt upward and enter in combustion chamber 2, the high temperature preheating upwards spraying the smoke backflow caused is had again and ignition in combustion chamber, leave combustion chamber after turning back by combustion chamber vault and enter the heat utilization device of bottom.
After the burner that hotblast stove adopts this coal gas and the pre-mixing of air grid hole and gas fume of combustion chamber backflow preheat to burn, just efficiently solve the key issue of the blast furnace hot blast stove combustion process such as poor, the pre-hot strength of low-heat value gas premixing effect is low, combustion instability, temperature of combustion are low.The present invention will mix while the combustion system taking a large amount of combustion space burnt changes into high-strength, quick, the lacunose jet pre-mixing in the little space of grid between coal gas with air, utilize to tilt upward to spray and form the air-flow backflow of turning back makes to be formed in combustion chamber high strength premix gas backflow preheat burning from preheating, if pile up combustion-supporting ceramic porous article further in combustion chamber, form the porous medium overheavy firing (for blast funnace hot blast stove) that high speed is stable.Do like this and not only improve the completeness of burning but also reduce the bags, what can realize flame (burning) stable can reach strengthening preheating premixed flow again and improve the object of partial combustion temperature.Obviously, for adopting the hotblast stove of other gas combustion apparatus, combustion unit due to the present invention's proposition is the little space high speed premix by coal gas and air grid hole jet mixing, and by premix gas vertically upward (or tilting upward) spray and the acting in conjunction of combustion chamber vault, produce backflow from preheating and eddy flow from pre-heat effect, so as to reaching the premix gas firing improving flame stability and guarantee high strength.In addition, because premix gas jet produces the degree of uniformity that the effect of smoke backflow can be used for regulating the flue gas flow field of the heat utilization device entering its underpart distribute, the air flow method that enters in chamber of hot-blast stove is namely regulated for blast funnace hot blast stove and realize in chamber of hot-blast stove efficient and conducting heat uniformly.This just significantly improves the thermal property of the hotblast stove adopting this combustion unit, make hotblast stove can under the condition of lower heat of combustion coal gas, under the condition of the equal not preheating of coal gas and air, to possess efficient, high wind-warm syndrome, with the function of energy-conserving and environment-protective, the present invention is through practical probation and test, effect is very good, compared with similar products, mixing uniformity significantly improves, structure is relatively simple, investment reduction cost about 10%, cause hotblast stove utilization ratio to improve because combustion processes improves while, and the quantity discharged of spent air temperture and obnoxious flavour can be reduced, reduce environmental pollution, there is economic and social benefit significantly.
Claims (5)
1. the burner of a coal gas and air grid premix spray back preheated burning, comprise combustion chamber body of wall (1), combustion chamber (2), air intake duct (3), gas inlet pipe (4), air distribution channel (5), gas allocation passage (6), gas-air premix grid (7) and premix gas jet passage (8), it is characterized in that, combustion chamber body of wall (1) is made up of together with the tubular wall connecting of lower vertical top vault, the internal space of combustion chamber body of wall is combustion chamber (2), on the tubular body of wall of combustion chamber body of wall (1), its axis vertical has been staggeredly arranged air intake duct (3) and gas inlet pipe (4) from top to bottom, air intake duct (3) and gas inlet pipe (4) are vertically connected the air distribution channel (5) and gas allocation passage (6) of building by laying bricks or stones in the body of wall of combustion chamber respectively, the gas-air premix grid (7) be made up of staggered gap jet pipe is had between the bottom of gas allocation passage (6) and the top of air distribution channel (5), the inlet communication of gas-air premix grid and premix gas jet passage (8), the outlet of premix gas jet passage (8) upwards with combustion chamber, described gas-air premix grid (7) to interlock at least two-layer extraction hole in the top of combination formation level and bottom for brick body, the extraction hole on top is coal gas grate opening, the extraction hole of bottom is air grid hole, the exit end of gas-air premix grid is communicated with the entrance end level of premix gas jet passage (8).
2. the burner of coal gas according to claim 1 and air grid premix spray back preheated burning, it is characterized in that, the refractory masses formation of described combustion chamber body of wall (1) for metal shell inwall being built high temperature resistant 1300 DEG C ~ 1500 DEG C by laying bricks or stones, the skin that the internal layer that resistant to elevated temperatures refractory masses is made up of the strong andaluzite high alumina brick of heat-shock resistance or dichroite-mullite brick, lightweight refractory are formed, and the ceramic fiber cotton of outer outside and sprayed coating combine the composite structure of formation from the inside to the outside successively.
3. the burner of coal gas according to claim 1 and air grid premix spray back preheated burning, it is characterized in that, described air intake duct (3) and gas inlet pipe (4) are the circular passages of building high alumina brick or clay brick formation on inner wall of metal tube by laying bricks or stones, and air intake duct (3) and gas inlet pipe (4) are vertically connected on the air distribution channel (5) of being built by laying bricks or stones by andaluzite high alumina brick of the square-section be arranged in combustion chamber body of wall (1) and the outside body of wall of gas allocation passage (6) respectively.
4. the burner of coal gas according to claim 1 and air grid premix spray back preheated burning, it is characterized in that, the groove that described premix gas jet passage (8) is upper opening, upper opening is outlet, tilt upward and combustion chamber, angle of inclination is the angle 60 ~ 90 ° of premix gas jet passage and combustion chamber horizontal plane.
5. the burner of coal gas according to claim 1 and air grid premix spray back preheated burning, is characterized in that, described premix gas jet passage (8) is for be made up of andaluzite high alumina brick or dichroite-mullite brick masonry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410198735.XA CN103924022B (en) | 2014-05-12 | 2014-05-12 | Combustor with coal gas and air premixed grills to achieve spray, backflow, preheating and combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410198735.XA CN103924022B (en) | 2014-05-12 | 2014-05-12 | Combustor with coal gas and air premixed grills to achieve spray, backflow, preheating and combustion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103924022A CN103924022A (en) | 2014-07-16 |
| CN103924022B true CN103924022B (en) | 2015-05-20 |
Family
ID=51142412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410198735.XA Active CN103924022B (en) | 2014-05-12 | 2014-05-12 | Combustor with coal gas and air premixed grills to achieve spray, backflow, preheating and combustion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103924022B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266188B (en) * | 2014-10-16 | 2016-07-06 | 陈维汉 | Gas oxygen-enriched combustion-supporting premixed swirl combustion device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374780A (en) * | 2010-08-12 | 2012-03-14 | 北京大方科技有限责任公司 | Structural design scheme of flat flame furnace |
| CN202415585U (en) * | 2012-01-19 | 2012-09-05 | 陈维汉 | Hot-blast stove for spraying mixed coal gas and air in loop from uniformly-distributed spray nozzles to form reflow for combusting |
| CN203090788U (en) * | 2013-01-09 | 2013-07-31 | 江苏永大化工机械有限公司 | Honeycomb turbulence gas distributor |
| CN203346416U (en) * | 2013-05-31 | 2013-12-18 | 河南省豫兴热风炉工程技术有限公司 | Top combustion stove provided with gas and air mixing spray pipe |
| CN103740880B (en) * | 2014-01-16 | 2015-04-08 | 陈维汉 | High-velocity burner for self-preheating of rotational flow and back flow in premixed airflow heat accumulator |
-
2014
- 2014-05-12 CN CN201410198735.XA patent/CN103924022B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103924022A (en) | 2014-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106196056B (en) | The burner of smoke backflow indole energy low with the temperature control of Staged Premixed Combustion | |
| CN105650624B (en) | A kind of coal gas and air classification premixed combustion and the hot-blast stove for spreading heat | |
| CN103900084B (en) | A kind of premixed flow forces the turbulent burner of smoke backflow preheated burning | |
| CN104266188B (en) | Gas oxygen-enriched combustion-supporting premixed swirl combustion device | |
| CN204100244U (en) | A kind of gas oxygen-enriched combustion-supporting premixed swirl combustion device | |
| CN102829471A (en) | Flameless combustion device for pre-mixing and up-injecting gas and air in rotational flow manner in annular channel | |
| CN103484588B (en) | Top combustion type hot air furnace arranging annular flameless combustion device below arch roof of combustion chamber | |
| CN101382286B (en) | Air flow circle alternating and equalization injection combustor for stabilizing flame by pre-mixing | |
| CN102494343B (en) | Combustion device for rotational flow mixed combustion by spraying air above uniformly distributed gas jets in loop | |
| CN204254614U (en) | Gas-air premix sprays the backflow preheat staged combustion device that vault jet guides | |
| CN203517788U (en) | Porous body burning combustor of remixing coal gas whirl flow with premix gas | |
| CN103740880B (en) | High-velocity burner for self-preheating of rotational flow and back flow in premixed airflow heat accumulator | |
| CN203820822U (en) | Coal gas and air grille premixing and ejection suction preheating combustion combustor | |
| CN103924022B (en) | Combustor with coal gas and air premixed grills to achieve spray, backflow, preheating and combustion | |
| CN204369917U (en) | A kind of combustion unit of airflow connection premix backflow preheat burning | |
| CN204434647U (en) | A kind of blast tube is communicated with the combustion apparatus with short flame that contracting nozzle regulates | |
| CN110044176A (en) | A kind of burner of the tunnel oven of the vertical upper spraying, combustion of premixed flow | |
| CN203215674U (en) | Combustor with built-in hot air pipe and combustion in nozzle orthogonal jet mixed heat accumulator | |
| CN106196054A (en) | The cyclone classification of a kind of center water conservancy diversion regulation and the burner of temperature-controllable | |
| CN106766901B (en) | A kind of aluminium melting furnace using smoke backflow low-oxygen high-temperature combustion | |
| CN203360477U (en) | Hot blast stove adopting coal gas and air orthogonal jetting and mixing and porous body for combustion supporting | |
| CN109442402A (en) | A kind of water cooling premixed combustion method and device | |
| CN203923239U (en) | Coal gas and air grid premix spray the burner of many eddy current convolution preheated burnings | |
| CN104805246B (en) | Flow equalizing hot blast heater with premix air flow nozzle interconnection and air supply flow curved flowing | |
| CN111237758B (en) | Combustion device for premixed airflow high-speed rotational flow jet flue gas backflow low-nitrogen combustion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |