CN103740880B - High-velocity burner for self-preheating of rotational flow and back flow in premixed airflow heat accumulator - Google Patents
High-velocity burner for self-preheating of rotational flow and back flow in premixed airflow heat accumulator Download PDFInfo
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- CN103740880B CN103740880B CN201410019666.1A CN201410019666A CN103740880B CN 103740880 B CN103740880 B CN 103740880B CN 201410019666 A CN201410019666 A CN 201410019666A CN 103740880 B CN103740880 B CN 103740880B
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Abstract
The invention relates to a high-velocity burner for self-preheating of rotational flow and back flow in a premixed airflow heat accumulator, and solves the problems that the coal gas and air mixing rate is low and the combustion intensity is low. The high-velocity burner is structurally characterized in that a burner wall is formed by connecting a spherical arch crown and a cylindrical part into a whole and is supported on a furnace shell through a bottom backing ring; an air inlet pipe and a coal gas inlet pipe are built on an air distribution loop and a coal gas distribution loop, respectively; a coal gas nozzle channel of the coal gas distribution loop is communicated with a coal gas and air premixing loop; an air nozzle channel of the air distribution loop is communicated with the coal gas and air premixing loop; a circular groove is formed in the inside ring wall of the coal gas and air premixing loop; the top is provided with a premixed gas vertical upward nozzle communicated with a combustion chamber; a horizontal inclined nozzle communicated with the combustion chamber is formed in the upper part of the inside ring wall; an airflow buffer circular groove is formed in the upper end of the premixed gas vertical upward nozzle; a hot air outlet pipe is arranged at the upper part of the cylindrical part. According to the high-velocity burner, the fuel is saved, the investment is reduced, waste gas temperature and the discharge amount of harmful gases are reduced, and the environmental pollution is reduced.
Description
Technical field
The present invention relates to the burner of blast funnace hot blast stove, especially for eddy flow in a kind of premixed flow heat storage providing high temperature blast for blast furnace and the high velocity burner of backflow from preheating.
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.Make a general survey of the various blast funnace hot blast stoves used at present, its gas combustion apparatus all mixes with air based on coal gas in combustion space, preheating, ignition pattern, problem that this pattern always exists mixing inequality, incomplete combustion, the bags is large, burner structure is complicated etc.; And air current composition in combustion chamber and regenerator misorient (flow velocity is selected, distribution of air flow and control, eddy flow and reflux state application etc.), cause in combustion chamber that the changing features of combustion gas flowing is large, air-flow is unstable, intensity of combustion is low, and then cause air flow method in regenerator uneven, reduce 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 burning, heat and mass and the theory of 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, the technological innovation in hotblast stove field presents active situation, and especially the technological invention of hotblast stove mainly concentrates in the improvement of burner and the improvement of heat storage body structure.
Summary of the invention
For above-mentioned situation, for overcoming prior art defect, the invention provides eddy flow and the high velocity burner of backflow from preheating in a kind of premixed flow heat storage of the top combustion stove of more comprehensive innovation structure, its way arranges at hotblast stove top to realize the quick pre-mixing of strong eddy flow, premixed flow vertically upper spray is sprayed with level rotary flow and is entered combustion chamber simultaneously, and the porous regenerator body through piling up in combustion chamber realizes eddy flow and the backflow burning that high speed is stable after preheating.Arrange such combustor hot wind saute stove just can effectively solve coal gas low with air mixed speed, mix uneven, the problem such as intensity of combustion is low, temperature of combustion is low, incomplete combustion, the bags are large and burner structure is unreasonable.
The technical scheme that the present invention solves is, comprise burner body of wall, combustion chamber, hot-blast outlet pipe, air intake duct, gas inlet pipe, air distributes circuit and gas allocation circuit, burner body of wall to be connected with the cylinder portion of its underpart by spherical vault shape part to form, its internal space is combustion chamber, the sleeve-shaped ceramic porous article of full preheated-combustion-supporting is piled up in combustion chamber, burner body of wall is supported on furnace shell by the backing ring bottom it, on the cylinder portion of burner body of wall its axis vertical from top to bottom correspondence be furnished with air intake duct and gas inlet pipe, air intake duct and gas inlet pipe are vertically connected the air of building by laying bricks or stones in burner body of wall respectively and distribute circuit and gas allocation circuit, the gasburner passage of multiple square-section is evenly equipped with in the inner side ringwall upper, annular of gas allocation circuit, after gasburner passage leaves the inner side ringwall of gas allocation circuit, be connected with the gas-air pre-mixing circuit of building by laying bricks or stones in burner body of wall with horizontal tilt direction, the inner side ringwall lower annular of air distribution circuit is evenly equipped with the air nozzle passage of multiple square-section, after air nozzle passage leaves the inner side ringwall of air distribution circuit, be connected with the gas-air pre-mixing circuit of building by laying bricks or stones in burner body of wall with horizontal tilt direction, gas-air pre-mixing circuit is square-section, inside it, ringwall metope is provided with the snap ring groove of the square-section of multiple adjustment air-flow from top to bottom, top is be communicated with the uniform multiple premix gas spout vertically upward of the circumference of combustion chamber, the horizontal tilt spout of the premix gas that ringwall top, inner side has the circumference of connection combustion chamber uniform, premix gas vertically upward spout upper end arranges the air-flow buffer annular groove of square-section upper end open, the cylinder portion top of burner body of wall is provided with and occupies air distribution circuit segment space and the hot-blast outlet pipe communicated with gas-air pre-mixing circuit.
The present invention is the mend gene on existing hot-blast stove gas burner architecture basics, interior DL stream and porous insert high speed eddy flow design from the combustion unit of preheating from preheating and backflow, effectively realize the Quick uniform mixing of Combustion of Hot Air Furnace device and the stable burning of high-speed and high-intensity, burning with accumulation of heat and ceramic porous article the piling up in combustion chamber of sleeve-shaped, greatly intensified burner from preheat function.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 B-B sectional view in Fig. 1 of the present invention.
Fig. 3 is A-A sectional view in 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, the present invention includes burner body of wall, combustion chamber, hot-blast outlet pipe, air intake duct, gas inlet pipe, air distributes circuit and gas allocation circuit, burner body of wall 1 to be connected with the cylinder portion of its underpart by spherical vault shape part to form, its internal space is combustion chamber 2, the sleeve-shaped ceramic porous article 2a of full preheated-combustion-supporting is piled up in combustion chamber, burner body of wall 1 is supported on furnace shell by the backing ring bottom it, on the cylinder portion of burner body of wall 1 its axis vertical from top to bottom correspondence be furnished with air intake duct 3 and gas inlet pipe 4, air intake duct 3 and gas inlet pipe 4 are vertically connected the air of building by laying bricks or stones in burner body of wall respectively and distribute circuit 5 and gas allocation circuit 6, the gasburner passage 8 of multiple square-section is evenly equipped with in the inner side ringwall upper, annular of gas allocation circuit 6, after gasburner passage leaves the inner side ringwall of gas allocation circuit 6, be connected with the gas-air pre-mixing circuit 9a built by laying bricks or stones in burner body of wall with horizontal tilt direction, the inner side ringwall lower annular of air distribution circuit 5 is evenly equipped with the air nozzle passage 7 of multiple square-section, after air nozzle passage leaves the inner side ringwall of air distribution circuit 5, be connected with the gas-air pre-mixing circuit 9a built by laying bricks or stones in burner body of wall with horizontal tilt direction, gas-air pre-mixing circuit 9a is square-section, inside it, ringwall metope is provided with the snap ring groove 9b of the square-section of multiple adjustment air-flow from top to bottom, top is be communicated with the uniform multiple premix gas spout 10a vertically upward of the circumference of combustion chamber 2, the horizontal tilt spout 10b of the premix gas that ringwall top, inner side has the circumference of connection combustion chamber 2 uniform, premix gas vertically upward spout 10a upper end arranges the air-flow buffer annular groove 10c of square-section upper end open, the cylinder portion top of burner body of wall 1 is provided with and occupies air distribution circuit 6 segment space and the hot-blast outlet pipe 11 communicated with gas-air pre-mixing circuit 9a.
Described burner body of wall be metal shell inwall is built by laying bricks or stones high temperature resistant 1300 DEG C ~ 1500 DEG C refractory masses form, 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, the ceramic fiber cotton of the skin that high-quality lightweight refractory is formed and outer outside and sprayed coating combine the integrative-structure of formation, piling with in combustion chamber can be good by high temperature thermal shock resistance, the molecular combustion-supporting ceramic porous article 12a of sleeve lattice of anti-adhesion, be connected with burner wall body vertical with the hot-blast outlet pipe 11 that andaluzite-mullite brick that resistance to elevated temperatures is stable is built by laying bricks or stones.
Described air intake duct 3 and gas inlet pipe 4 are the circular passage of inner wall of metal tube being built high alumina brick or clay brick refractory materials formation by laying bricks or stones, air intake duct 3 gas inlet pipe 4 is separately positioned on top and the bottom of the cylinder portion side of burner body of wall 1, is vertically connected in burner body of wall 1 and is built by laying bricks or stones on the air distribution circuit 5 in orthogonal cross section and the outside ringwall of gas allocation circuit 6 by andaluzite high alumina brick.
Described air distributes and inside circuit 5 and gas allocation circuit 6, ringwall to be respectively arranged with the air nozzle passage 7 and gasburner passage 8 that the equally distributed level of multiple annular, peripheral picks out, its cross section is fan-shaped or rectangle, is connected with the outside of level inclination 0 ~ 45 ° with gas-air pre-mixing circuit 9a.
Described multiple premix gas vertically upward spout 10a cross section are rectangle or fan-shaped, and the horizontal tilt angle of the horizontal tilt spout 10b of premix gas is 15 ° ~ 45 °, forms by andaluzite high alumina brick or dichroite-mullite brick masonry.
During enforcement, coal gas and air are by drawing uniform air nozzle passage 7 and gasburner passage 8 inside respective distribution circuit in the burner, enter from ringwall upper and lower horizontal tilt outside coal gas and air pre-mixing cyclization road 9a respectively, and mutual eddy flow is fast mixed to form premixed flow wherein, it is more even that regulating effect through uniform snap ring groove 9b makes it mixing, a premixed flow part through premix gas the 10a of spout vertically upward and spray and enter air-flow buffer annular groove 10b, enter afterwards the preheated-combustion-supporting ceramic porous article 2a(sleeve checker brick piled up in combustion chamber 2 pile up form), complete combustion processes turning back after preheating through high temperature gases recirculating to enter in ceramic porous article 2a that stacking fully stacks in a combustion chamber, meanwhile, another part that eddy flow is mixed to form premixed flow fast in air pre-mixing cyclization road 9a enters in the ceramic porous article 2a piled up in combustion chamber through the horizontal tilt spout 10b of premix gas, at eddy flow also ignition rapidly under pre-heat effect, two strands of air-flows converge (or interaction) formed afterwards circumference and radial distribution all comparatively equably flue gas flow field enter the heat utilization device of bottom.Hotblast stove adopts eddy flow and backflow in this swirl-flow premixed heat storage after the burner of the steady flame high velocity combustion of preheating, just to efficiently solve the key issues such as low-heat value gas combustion instability, intensity of combustion is weak, temperature of combustion is low.To mix while the combustion system taking a large amount of combustion space burnt changes into quick strong swirl-flow premixed conjunction in circuit between coal gas with air, the backflow of turning back through vertical up-spray interruption-forming air-flow is from preheating, the combustion system of high-intensity combustion in combustion chamber is reached from preheating with the eddy flow formed through horizontal tilt spout, especially adopt in combustion chamber and pile up the high speed stable burning of combustion-supporting ceramic porous article and the application of overheavy firing pattern, not only improve the completeness of burning but also reduce the bags; What can realize flame (burning) stable can reach again strengthening preheating coal gas and air pre-mixing air-flow and improve the object of partial combustion temperature.Therefore, for adopting the hotblast stove of other gas combustion apparatus, the combustion unit proposed due to the present invention is realized coal gas and air by short mix in swirl injection pre-mixing circuit fast mixed and all mixed, and by premix gas, vertically upper spray and horizontal tilt are sprayed the pattern combined and are completed that ceramic porous article (heat storage) is middle to reflux from preheating and eddy flow from preheating, so as to reaching high flow rate flame stabilization and high-intensity combustion, and by two kinds of air-flows interact the air flow method that regulates and enter in chamber of hot-blast stove and realize in chamber of hot-blast stove efficient with conduct heat uniformly, this just greatly 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.In addition, the compact further saving that not only can bring investment cost of structure is also the stable condition that provides the foundation of hotblast stove structure.
Claims (5)
1. eddy flow and the high velocity burner of backflow from preheating in a premixed flow heat storage, comprise burner body of wall, combustion chamber, hot-blast outlet pipe, air intake duct, gas inlet pipe, air distributes circuit and gas allocation circuit, it is characterized in that, burner body of wall (1) to be connected with the cylinder portion of its underpart by spherical vault shape part to form, its internal space is combustion chamber (2), the sleeve-shaped ceramic porous article (2a) of full preheated-combustion-supporting is piled up in combustion chamber, burner body of wall (1) is supported on furnace shell by the backing ring bottom it, on the cylinder portion of burner body of wall (1) its axis vertical from top to bottom correspondence be furnished with air intake duct (3) and gas inlet pipe (4), air intake duct (3) and gas inlet pipe (4) are vertically connected the air of building by laying bricks or stones in burner body of wall respectively and distribute circuit (5) and gas allocation circuit (6), the gasburner passage (8) of multiple square-section is evenly equipped with in the inner side ringwall upper, annular of gas allocation circuit (6), after gasburner passage leaves the inner side ringwall of gas allocation circuit (6), be connected with the gas-air pre-mixing circuit (9a) of building by laying bricks or stones in burner body of wall with horizontal tilt direction, the inner side ringwall lower annular of air distribution circuit (5) is evenly equipped with the air nozzle passage (7) of multiple square-section, after air nozzle passage leaves the inner side ringwall of air distribution circuit (5), be connected with the gas-air pre-mixing circuit (9a) of building by laying bricks or stones in burner body of wall with horizontal tilt direction, gas-air pre-mixing circuit (9a) is square-section, inside it, ringwall metope is provided with the snap ring groove (9b) of the square-section of multiple adjustment air-flow from top to bottom, top is for being communicated with the uniform multiple premix gas spout (10a) vertically upward of circumference of combustion chamber (2), the horizontal tilt spout (10b) of the premix gas that ringwall top, inner side has the circumference of connection combustion chamber (2) uniform, premix gas vertically upward spout (10a) upper end arranges the air-flow buffer annular groove (10c) of square-section upper end open, the cylinder portion top of burner body of wall (1) is provided with and occupies air distribution circuit segment space and the hot-blast outlet pipe (11) communicated with gas-air pre-mixing circuit (9a).
2. eddy flow and the high velocity burner of backflow from preheating in premixed flow heat storage according to claim 1, it is characterized in that, described burner body of wall be metal shell inwall is built by laying bricks or stones high temperature resistant 1300 DEG C ~ 1500 DEG C refractory masses form, 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, the ceramic fiber cotton of the skin that lightweight refractory is formed and outer outside and sprayed coating combine the integrative-structure of formation, piling with in combustion chamber can be good by high temperature thermal shock resistance, the molecular combustion-supporting ceramic porous article (12a) of sleeve lattice of anti-adhesion, the hot-blast outlet pipe (11) of building by laying bricks or stones with andaluzite-mullite brick that resistance to elevated temperatures is stable is connected with burner wall body vertical.
3. eddy flow and the high velocity burner of backflow from preheating in premixed flow heat storage according to claim 1, it is characterized in that, described air intake duct (3) and gas inlet pipe (4) are for inner wall of metal tube being built the circular passage of high alumina brick or clay brick refractory materials formation by laying bricks or stones, air intake duct (3) gas inlet pipe (4) is separately positioned on top and the bottom of the cylinder portion side of burner body of wall (1), be vertically connected in burner body of wall (1) and built by laying bricks or stones on air distribution circuit (5) in orthogonal cross section and the outside ringwall of gas allocation circuit (6) by andaluzite high alumina brick.
4. eddy flow and the high velocity burner of backflow from preheating in the premixed flow heat storage according to claim 1 or 3, it is characterized in that, described air distributes and inside circuit (5) and gas allocation circuit (6), ringwall to be respectively arranged with the air nozzle passage (7) and gasburner passage (8) that the equally distributed level of multiple annular, peripheral picks out, its cross section is fan-shaped or rectangle, is connected with the outside of level inclination 0 ~ 45 ° with gas-air pre-mixing circuit (9a).
5. eddy flow and the high velocity burner of backflow from preheating in premixed flow heat storage according to claim 1, it is characterized in that, described multiple premix gas vertically upward spout (10a) cross section are rectangle or fan-shaped, the horizontal tilt angle of the horizontal tilt spout (10b) of premix gas is 15 ° ~ 45 °, forms by andaluzite high alumina brick or dichroite-mullite brick masonry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410019666.1A CN103740880B (en) | 2014-01-16 | 2014-01-16 | High-velocity burner for self-preheating of rotational flow and back flow in premixed airflow heat accumulator |
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| CN201410019666.1A CN103740880B (en) | 2014-01-16 | 2014-01-16 | High-velocity burner for self-preheating of rotational flow and back flow in premixed airflow heat accumulator |
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| CN103740880B true CN103740880B (en) | 2015-04-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103924022B (en) * | 2014-05-12 | 2015-05-20 | 陈维汉 | Combustor with coal gas and air premixed grills to achieve spray, backflow, preheating and combustion |
| 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 |
| CN105546520A (en) * | 2015-09-30 | 2016-05-04 | 洛阳理工学院 | Integrated annular combustion chamber |
Citations (4)
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| CN102563620A (en) * | 2012-01-19 | 2012-07-11 | 陈维汉 | Combustion device for preheating and combusting sprayed-up backflow on nozzle with uniform mixing and distribution of coal gas and air |
| CN202415583U (en) * | 2011-12-22 | 2012-09-05 | 陈维汉 | Hot-blast stove with upwards spraying air and rotational-flow mixed combusting apparatus and coal gas nozzles uniformly distributed in ring channel |
| CN102829471A (en) * | 2012-09-28 | 2012-12-19 | 陈维汉 | Flameless combustion device for pre-mixing and up-injecting gas and air in rotational flow manner in annular channel |
| CN202808853U (en) * | 2012-09-28 | 2013-03-20 | 陈维汉 | Hot-blast stove for realizing combustion in heat-retaining mass via up-and-down injecting, hedging and mixing of nozzles in pre-combustion chamber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5772047B2 (en) * | 2011-02-21 | 2015-09-02 | 株式会社Ihi | Top combustion hot stove |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202415583U (en) * | 2011-12-22 | 2012-09-05 | 陈维汉 | Hot-blast stove with upwards spraying air and rotational-flow mixed combusting apparatus and coal gas nozzles uniformly distributed in ring channel |
| CN102563620A (en) * | 2012-01-19 | 2012-07-11 | 陈维汉 | Combustion device for preheating and combusting sprayed-up backflow on nozzle with uniform mixing and distribution of coal gas and air |
| CN102829471A (en) * | 2012-09-28 | 2012-12-19 | 陈维汉 | Flameless combustion device for pre-mixing and up-injecting gas and air in rotational flow manner in annular channel |
| CN202808853U (en) * | 2012-09-28 | 2013-03-20 | 陈维汉 | Hot-blast stove for realizing combustion in heat-retaining mass via up-and-down injecting, hedging and mixing of nozzles in pre-combustion chamber |
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