CN203820823U - Combustor capable of preheating and premixing coal gas suction smoke and grille jetted air - Google Patents
Combustor capable of preheating and premixing coal gas suction smoke and grille jetted air Download PDFInfo
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- CN203820823U CN203820823U CN201420239303.4U CN201420239303U CN203820823U CN 203820823 U CN203820823 U CN 203820823U CN 201420239303 U CN201420239303 U CN 201420239303U CN 203820823 U CN203820823 U CN 203820823U
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Abstract
The utility model relates to a combustor capable of preheating and premixing coal gas suction smoke and grille jetted airand effectively solves the problems of low coal gas and air mixing rate, uneven mixing, low combustion intensity, low combustion temperature, incomplete combustion, large combustion chamber spaces and unreasonable combustor structures. Coal gas and air inlet pipes on a combustion chamber wall are connected with coal gas and air distribution channels, a coal gas ejection jet pipe on the coal gas distribution channel is communicated with a smoke suction port and a coal gas and air premixing channel, the smoke suction port is communicated with a combustion chamber in the combustion chamber wall, an air grille nozzle at the top of the air distribution channel is connected with the coal gas and air premixing channel, the coal gas and air premixing channel is communicated with the combustion chamber, an upper jet stream blocking ring is arranged on the inner wall of the combustion chamber wall at the upper part of the coal gas and air premixing channel, and a hot air outlet pipe is arranged at the upper part of the combustion chamber wall. The combustor is high in combustion intensity and even in combustion and has good effects of saving fuel and investment, reducing temperatures of exhaust gases and emissions of harmful gases and reducing environmental pollution.
Description
Technical field
The utility model relates to the burner of blast funnace hot blast stove, sprays the burner of premix especially for a kind of coal gas suction smoke pre-heating air grid that high temperature blast is provided for blast furnace.
Background technology
Current, blast funnace hot blast stove is considered to require under lower heat of combustion blast furnace gas, to obtain high-performance and high wind-warm syndrome from energy-saving and cost-reducing, and finally reach efficiently, the object of energy-saving and environmental protection, volume increase.For this reason, in hotblast stove, must realize the combustion processes of the optimizing stove internal procedure that combines with the heat transfer process of strengthening.It is particularly crucial on the impact of hotblast stove that this just relates to structure, heat storage body structure and the layout of combustion unit and the structure of the tissue of air velocity distribution, especially burner and performance.Make a general survey of the burner of the various blast funnace hot blast stoves of current use, all take that coal gas mixes in combustion space with air, preheating, ignition pattern be as main, always there is the problem such as mix inequality, incomplete combustion, the bags is large, burner structure selection is improper in this pattern; This just causes, and in combustion chamber, the changing features of combustion gas flowing is large, air-flow is unstable, intensity of combustion is low, and then causes air-flow skewness in regenerator, 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 arranging, thus the performance of entire effect hotblast stove and practical effect.Therefore, along with people are to the mobile theory of burning, heat and mass and fluid and the raising of utilisation technology understanding and going deep into of application practice, and iron-smelting process is for stablizing the demand of high wind-warm syndrome and metallurgy industry is efficient, energy-conservation and the attention of environmental protection, imperative with the texture improvement in burning homogeneity to the intensity of combustion of the burner in hotblast stove field.
Summary of the invention
For above-mentioned situation, for overcoming prior art defect, the utility model provides a kind of coal gas suction smoke pre-heating air grid to spray the burner of premix, effectively solve coal gas and air mixed speed low, inhomogeneous, intensity of combustion is low, temperature is low, incomplete, the bags is large and the irrational problem of burner structure.
The technical scheme that the utility model solves is, comprise combustion chamber body of wall, combustion chamber, hot-blast outlet pipe, gas inlet pipe, air intake duct, gas allocation passage, air distribution channel, coal gas nozzles with injector, air grid nozzle, flue gas suction port, coal gas air pre-mixing closes passage and upper gaseous blast stops circle, combustion chamber body of wall is to be connected and to form with bottom cylinder by top semisphere vault, the internal space of combustion chamber body of wall is combustion chamber, on the cylinder outer wall of combustion chamber body of wall, be staggeredly arranged from top to bottom perpendicular to air intake duct and the gas inlet pipe of cylinder, gas inlet pipe is vertically connected respectively gas allocation passage and the air distribution channel of building by laying bricks or stones in the body of wall of combustion chamber with air intake duct, in the inside wall of gas allocation passage, along passage, be evenly equipped with a plurality of upwardly extending coal gas nozzles with injectors, coal gas nozzles with injector is diffusion structure after first shrinking, minimum place, vertical section is communicated with flue gas suction port, the bottom of simultaneously upwards closing passage with coal gas air pre-mixing is communicated with, flue gas suction port is communicated with combustion chamber, there is air grid nozzle at the top of air distribution channel along access arrangement, air grid nozzle is by multilayer circumferential arrangement, pore channel alternately forms, horizontal or vertical inclination and coal gas air pre-mixing are closed the outside wall connecting of passage, coal gas air pre-mixing is closed the open top of passage and is communicated with combustion chamber, coal gas air pre-mixing is closed on the combustion chamber body of wall inwall on passage top has upper gaseous blast to stop circle, the cylinder top of combustion chamber body of wall has with coal gas air pre-mixing closes the hot-blast outlet pipe that passage is connected.
The utility model is improvement and the innovation of doing on existing hot-blast stove gas burner architecture basics, the combustion unit design mixing in the premixed channel spraying with air grid with the preheating of coal gas suction smoke backflow, the Quick uniform of effectively realizing Combustion of Hot Air Furnace device mixes and high strength backflow preheat, has effectively improved the homogeneity of intensity of combustion and burning.On hotblast stove, adopt this burner just can guarantee efficient, the high-heat strength of hotblast stove under safety and stablization prerequisite and the operation of high wind pushing temperature, the quantity discharged that then reach fuel saving, save investment, reduces spent air temperture and obnoxious flavour is, the good result of minimizing environmental pollution.
Accompanying drawing explanation
Fig. 1 is sectional front view of the present utility model.
Fig. 2 is the A-A sectional view of the utility model Fig. 1.
Fig. 3 is the B-B sectional view of the utility model Fig. 1.
Fig. 4 is that C on the utility model Fig. 1 is to view.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.
As Fig. 1, Fig. 2, shown in Fig. 3 and Fig. 4, the utility model comprises combustion chamber body of wall 1, combustion chamber 2, hot-blast outlet pipe 11, gas inlet pipe 3, air intake duct 4, gas allocation passage 5, air distribution channel 6, coal gas nozzles with injector 7, air grid nozzle 8, flue gas suction port 9, coal gas air pre-mixing closes path 10 b and upper gaseous blast stops circle 10a, combustion chamber body of wall 1 is to be connected and to form with bottom cylinder by top semisphere vault, the internal space of combustion chamber body of wall is combustion chamber 2, on the cylinder outer wall of combustion chamber body of wall 1, be staggeredly arranged from top to bottom perpendicular to air intake duct 4 and the gas inlet pipe 3 of cylinder, gas inlet pipe 3 is vertically connected respectively the gas allocation passage 5 and air distribution channel 6 of building by laying bricks or stones in the body of wall of combustion chamber with air intake duct 4, in the inside wall of gas allocation passage 5, along passage, be evenly equipped with a plurality of upwardly extending coal gas nozzles with injectors 7, coal gas nozzles with injector 7 is diffusion structure after first shrinking, minimum place, vertical section is communicated with flue gas suction port 9, the bottom of simultaneously upwards closing path 10 b with coal gas air pre-mixing is communicated with, flue gas suction port 9 is communicated with combustion chamber 2, there is air grid nozzle 8 at the top of air distribution channel 6 along access arrangement, air grid nozzle is by multilayer circumferential arrangement, pore channel alternately forms, horizontal or vertical inclination and coal gas air pre-mixing are closed the outside wall connecting of path 10 b, coal gas air pre-mixing is closed the open top of path 10 b and is communicated with combustion chamber 2, coal gas air pre-mixing is closed on the combustion chamber body of wall inwall on passage top has upper gaseous blast to stop circle 10a, the cylinder top of combustion chamber body of wall has with coal gas air pre-mixing closes the hot-blast outlet pipe 11 that passage is connected.
Described combustion chamber body of wall 1 forms for building the refractory masses of high temperature resistant 1300 ℃～1500 ℃ on metal shell inwall by laying bricks or stones, the internal layer that resistant to elevated temperatures refractory masses consists of the strong andaluzite high alumina brick of heat-shock resistance or dichroite-mullite brick, the skin that lightweight refractory forms, and ceramic fiber cotton and the sprayed coating of outer outside are combined the composite structure of formation from the inside to the outside successively.
Described gas inlet pipe 3 and air intake duct 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 the gas allocation passage 5 being connected with air intake duct with gas inlet pipe is respectively the rectangular channels of being built by laying bricks or stones by andaluzite high alumina brick with air distribution channel 6.
Described coal gas driving nozzle 7 is the nozzle structure of convergent-divergent shape, the direction of shrinking is for radially, the direction of expansion is circumferential, cross section is rectangle or fan-shaped, the contraction section inside wall of convergent-divergent shape is connected with a port of flue gas suction port 9, flue gas suction port 9 another ports are communicated with combustion chamber 2, and the level inclination of the flue gas suction port 9 of square-section is 0～45 °.
Described air grid nozzle 8 closes path 10 b with 0～45 ° of level inclination and coal gas air pre-mixing and is communicated with, and it is the rectangular channel of being built by laying bricks or stones by andaluzite high alumina brick that coal gas air pre-mixing is closed path 10 b.
The bottom of described combustion chamber body of wall 1 is cylinder, and the gas allocation passage in the body of wall of combustion chamber, air distribution channel, coal gas air pre-mixing are closed passage and be end to end circular channel.
During enforcement, in burner, coal gas enters uniform coal gas nozzles with injector 7 by the inner side of gas allocation passage 5, through the speed-raising step-down of its convergent-divergent shape passage and attract high-temperature flue gas to enter coal gas nozzles with injector 7 from combustion chamber by flue gas suction port 9, at this jet diffusion, be mixed and fed into coal gas air pre-mixing and close path 10 b bottom, and the airflow quadrature ejecting with air grid nozzle 8 at this meet and mutually Quick uniform mix and form the premixed flow of preliminary preheating, in the process of making progress, on warp, gaseous blast stops stopping of 10a of circle and regular entering in combustion chamber 2, in combustion chamber, the turned back further preheating of high-temperature flue gas that refluxes and ignition, the heat utilization device of leaving combustion chamber after turning back by combustion chamber vault and entering bottom.
The utility model is to arrange by combustion chamber side air distribution channel 5 within the walls at hotblast stove top, gas allocation passage 6, coal gas nozzles with injector 7, air grid nozzle 8, flue gas suction port 9a and coal gas air pre-mixing are closed the burner apparatus that path 10 b is interconnected and forms, the burner structure that it is unique, can realize coal gas injection high-temperature flue gas and enforceable preheating, and the pore channel of air grid nozzle sprays, and close quick in path 10 b and abundant pre-mixing in coal gas air pre-mixing, on premixed flow is vertical, be advanced into combustion chamber through turning back backflow flue gas preheating and ignition, thereby realize the burning of high strength and the high stability of injection smoke backflow and backflow preheat.Hotblast stove adopts after the burner of space jet mixing, combustion chamber backflow preheat and stable burning between the preheating of this coal gas injection flue gas forced refluence, coal gas and air, just can effectively solve that poor, the pre-hot strength of low-heat value gas premixing effect is low, the key issue of the blast furnace hot blast stove combustion process such as combustion instability, temperature of combustion are low.Coal gas and the combustion system that takies a large amount of combustion spaces burning while mixing between air are changed into injection flue gas forced refluence preheating gas and the fast strong jet pre-mixing of grid hole in passage, the burning of backflow high-intensity combustion in the combustion chamber of preheating of turning back through vertical up-spray interruption-forming air-flow again, coordinate high speed stable burning and the overheavy firing pattern (for blast funnace hot blast stove) of in combustion chamber, piling up combustion-supporting ceramic porous article, not only improved the completeness of burning but also dwindled the bags; Can realize the object that can reach strengthening preheating premixed flow again and improve partial combustion temperature of stablizing of flame (burning).Therefore, for the hotblast stove of other gas combustion apparatus of employing, combustion unit of the present utility model is forced smoke backflow preheating by gas injection, and hole is injected in rapidly pre-warming, the premix and all mixed of realizing coal gas and air in pre-mixing passage; And by spout and the combustion chamber vault effect vertically upward of premix gas, produce and reflux from pre-heat effect, so as to reaching, improve flame stability and guarantee high-intensity premix gas firing.In addition, also by gas injection, attract smoke backflow to cause flue gas flow to produce certain eddy flow, the homogeneity that can be used to regulate the flue gas flow field of the heat utilization device of its underpart to distribute, for blast funnace hot blast stove namely regulate the air-flow entering in chamber of hot-blast stove to distribute and realize in chamber of hot-blast stove efficient with conduct heat uniformly.This has just greatly improved the thermal property of the hotblast stove that adopts this burner, makes the hotblast stove can be under the condition of lower heat of combustion coal gas, at coal gas and air all under the condition of not preheating, has possessed efficient, high wind-warm syndrome, and the function of energy-conserving and environment-protective.
Claims (6)
1. a coal gas aspirates the burner that smoke pre-heating air grid sprays premix, comprise combustion chamber body of wall (1), combustion chamber (2), hot-blast outlet pipe (11), gas inlet pipe (3), air intake duct (4), gas allocation passage (5), air distribution channel (6), coal gas nozzles with injector (7), air grid nozzle (8), flue gas suction port (9), coal gas air pre-mixing closes passage (10b) and upper gaseous blast stops circle (10a), it is characterized in that, combustion chamber body of wall (1) is to be connected and to form with bottom cylinder by top semisphere vault, the internal space of combustion chamber body of wall is combustion chamber (2), on the cylinder outer wall of combustion chamber body of wall (1), be staggeredly arranged from top to bottom perpendicular to air intake duct (4) and the gas inlet pipe (3) of cylinder, gas inlet pipe (3) is vertically connected respectively the gas allocation passage (5) and air distribution channel (6) of building by laying bricks or stones in the body of wall of combustion chamber with air intake duct (4), in the inside wall of gas allocation passage (5), along passage, be evenly equipped with a plurality of upwardly extending coal gas nozzles with injectors (7), coal gas nozzles with injector (7) is diffusion structure after first shrinking, minimum place, vertical section is communicated with flue gas suction port (9), the bottom of simultaneously upwards closing passage (10b) with coal gas air pre-mixing is communicated with, flue gas suction port (9) is communicated with combustion chamber (2), there is air grid nozzle (8) at the top of air distribution channel (6) along access arrangement, air grid nozzle is by multilayer circumferential arrangement, pore channel alternately forms, horizontal or vertical inclination and coal gas air pre-mixing are closed the outside wall connecting of passage (10b), coal gas air pre-mixing is closed the open top of passage (10b) and is communicated with combustion chamber (2), coal gas air pre-mixing is closed on the combustion chamber body of wall inwall on passage top has upper gaseous blast to stop circle (10a), the cylinder top of combustion chamber body of wall has with coal gas air pre-mixing closes the hot-blast outlet pipe (11) that passage is connected.
2. coal gas suction smoke pre-heating air grid according to claim 1 sprays the burner of premix, it is characterized in that, described combustion chamber body of wall (1) forms for building the refractory masses of high temperature resistant 1300 ℃～1500 ℃ on metal shell inwall by laying bricks or stones, the internal layer that resistant to elevated temperatures refractory masses consists of the strong andaluzite high alumina brick of heat-shock resistance or dichroite-mullite brick, the skin that lightweight refractory forms, and ceramic fiber cotton and the sprayed coating of outer outside are combined the composite structure of formation from the inside to the outside successively.
3. coal gas suction smoke pre-heating air grid according to claim 1 sprays the burner of premix, it is characterized in that, described gas inlet pipe (3) and air intake duct (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 the gas allocation passage (5) being connected with air intake duct with gas inlet pipe is respectively the rectangular channel of being built by laying bricks or stones by andaluzite high alumina brick with air distribution channel (6).
4. coal gas suction smoke pre-heating air grid according to claim 1 sprays the burner of premix, it is characterized in that, described coal gas driving nozzle (7) is the nozzle structure of convergent-divergent shape, the direction of shrinking is for radially, the direction of expansion is circumferential, cross section is rectangle or fan-shaped, the contraction section inside wall of convergent-divergent shape is connected with a port of flue gas suction port (9), another port of flue gas suction port (9) is communicated with combustion chamber (2), and the level inclination of the flue gas suction port (9) of square-section is 0～45 °.
5. coal gas suction smoke pre-heating air grid according to claim 1 sprays the burner of premix, it is characterized in that, described air grid nozzle (8) closes passage (10b) with 0～45 ° of level inclination and coal gas air pre-mixing and is communicated with, and it is the rectangular channel of being built by laying bricks or stones by andaluzite high alumina brick that coal gas air pre-mixing is closed passage (10b).
6. coal gas suction smoke pre-heating air grid according to claim 1 sprays the burner of premix, it is characterized in that, the bottom of described combustion chamber body of wall (1) is cylinder, and the gas allocation passage in the body of wall of combustion chamber, air distribution channel, coal gas air pre-mixing are closed passage and be end to end circular channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420239303.4U CN203820823U (en) | 2014-05-12 | 2014-05-12 | Combustor capable of preheating and premixing coal gas suction smoke and grille jetted air |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420239303.4U CN203820823U (en) | 2014-05-12 | 2014-05-12 | Combustor capable of preheating and premixing coal gas suction smoke and grille jetted air |
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| CN203820823U true CN203820823U (en) | 2014-09-10 |
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| CN201420239303.4U Active CN203820823U (en) | 2014-05-12 | 2014-05-12 | Combustor capable of preheating and premixing coal gas suction smoke and grille jetted air |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805246A (en) * | 2015-04-21 | 2015-07-29 | 陈维汉 | Flow equalizing hot blast heater with premix air flow nozzle interconnection and air supply flow curved flowing |
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2014
- 2014-05-12 CN CN201420239303.4U patent/CN203820823U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805246A (en) * | 2015-04-21 | 2015-07-29 | 陈维汉 | Flow equalizing hot blast heater with premix air flow nozzle interconnection and air supply flow curved flowing |
| CN104805246B (en) * | 2015-04-21 | 2017-04-26 | 陈维汉 | Flow equalizing hot blast heater with premix air flow nozzle interconnection and air supply flow curved flowing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210526 Address after: Metallurgy Avenue, Yangzhai Town, Guangshui City, Suizhou City, Hubei Province 432700 Patentee after: Hubei Sino New Material Technology Co.,Ltd. Address before: 450003 room 1108, Zhenghua building, 56 Huayuan Road, Jinshui District, Zhengzhou City, Henan Province Patentee before: Chen Weihan |
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| TR01 | Transfer of patent right |