CN101793396A - Combustion device for upper spraying, combustion, exhumation and outflow of premixed annular airflow - Google Patents
Combustion device for upper spraying, combustion, exhumation and outflow of premixed annular airflow Download PDFInfo
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- CN101793396A CN101793396A CN 201010124032 CN201010124032A CN101793396A CN 101793396 A CN101793396 A CN 101793396A CN 201010124032 CN201010124032 CN 201010124032 CN 201010124032 A CN201010124032 A CN 201010124032A CN 101793396 A CN101793396 A CN 101793396A
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Abstract
The invention relates to a combustion device for upper spraying, combustion, exhumation and outflow of premixed annular airflow, which effectively solves the problems that gas and blasting air rapidly combust in the combustion chamber after flowing into the premixing loop and the gas flow in the flue flow field is uniform and stable. The combustion device is a combustion chamber which consists of a dome cylinder type lower opening, a cylinder type wall body and a semi-spherical dome and is used for flow and combustion of premixed gas flow, a gas loop and an air loop are separately arranged along the vertical direction in the inner wall of the cylinder type wall body, the periphery of the inner side of the gas loop is uniformly provided with gas nozzles with rectangular sections, and the periphery of the inner side of the air loop is uniformly provided with air nozzles with rectangular sections; the outer sides of the gas loop and the air loop are respectively connected with a gas inlet pipe and an air inlet pipe; the spouts of the gas nozzles and the air nozzles are vertically communicated with the outer side of a premixing loop; and the premixing loop is an annular loop with the upper opening on the rectangular section of the combustion chamber and is tightly and coaxially connected with the inner wall of the combustion chamber. The invention has the advantages of low manufacturing and installation difficulty and high stability, and can reduce the excess air coefficient, enhance the combustion intensity and increase the combustion temperature.
Description
One, technical field
The present invention relates to a kind of device of gas fuel combustion, the burner that particularly a kind of premixed annular airflow upper spraying, combustion is turned back and flowed out, it is applied on the hot-blast stove and industrial furnace of industry heating as a kind of burner.
Two, background technology
Burner is the indispensable core apparatus of burning class industrial furnace equipment, and its performance and structure directly have influence on fuel availability, the thermal efficiency of stove and whether satisfy energy conservation and environment protection.At present, with regard to low-heat value gas (as blast furnace gas, producer gas) combustion process, its mixed combustion mode can be divided into diffusion combustion (long flame burning), half premixed combustion, reach three kinds of forms of premixed combustion (short burnout), its corresponding burner structure also has nothing in common with each other, and premixed combustion makes it develop main direction with regard to its development trend.End is got up, the burner of industrial furnace has been finished from sleeve burner, progressively carry out the transition to the conversion of the rectangle burner of comb shape air nozzle, and develop into that annular multiple nozzle spraying eddy flow mixes, the staggered air-flow backflow preheat overheavy firing technology of turning back that goes up after the spray premixed combustion of backflow preheat overheavy firing technology or annular multiinjector.Along with the development of combustion technology, the combustion intensity of low-heat value gas and the stability of flame all are greatly improved, cooperate the preheating of going up coal gas and combustion air to make that ignition temperature also constantly increases, efficiency of combustion also progressively promotes again.But make a general survey of existing gas burner, still exist burner structure complexity, combustion-gas flow to distribute problems such as poor controllability uneven, combustion-gas flow, cause problems such as incomplete combustion or combustion instability, heat load adjustment poor performance to occur thus.Simultaneously, Fu Za structure also usually causes the burner structure damage.Therefore, design the main direction that Stability Analysis of Structures, function admirable, energy-efficient, environmental and durable burner should be the burner development.
Three, summary of the invention
At above-mentioned situation, for overcoming the prior art defective, the invention provides the burner that a kind of premixed annular airflow upper spraying, combustion is turned back and flowed out, being sprayed on the combustion chamber fast speed on vertical after effectively solving coal gas and air-spray entering premix circuit ram-jet and mixes mutually burns, and air-flow is turned back through vault and is formed backflow flow field and the problem of leaving the uniform and stable flue gas flow field of combustion chamber, because the quick premix and the combustion chamber premixed combustion in little space can effectively reduce excess air factor, improve ignition temperature and combustion intensity, and then simplified structure and alleviate the weight of burner.
The technical scheme that the present invention solves is, this burner is a ball tip circle tubular under shed, cylinder body of wall 1 constitutes the combustion chamber 1b that can make the premixed flow flow burning with hemispherical vault 1a, arranged apart up and down in cylinder body of wall 1 inwall have top coal gas circuit 2 and a following air circuit 3, coal gas circuit inner circumferential is evenly arranged the jet for gas 4 of square-section, and air circuit inner circumferential is evenly arranged the air nozzle 5 of square-section; Coal gas circuit 2 is connected gas inlet pipe 7 and air intake duct 8 respectively with the outside of air circuit 3; The spout of two kinds of nozzles communicates with premix circuit 6 outside vertical; Premix circuit 6 is upper opening circular passages in the square-section of combustion chamber, and links to each other with combustion chamber 1b inwall close coaxial, and coal gas enters jet for gas 4 after entering coal gas circuit 2 by gas inlet pipe 7 again, and vertical then the injection enters premix circuit 6; Simultaneously, air enters air circuit 3 by air intake duct 8 and flows into air nozzle 5 again, and vertical then the injection enters premix circuit 6; Coal gas injects directly on the relative wall of premix circuit with air-spray, disperse to cause two kinds of mutual fully and apace mixing of air-flow around the jet air-flow, premix circuit 6 openings upwards, make the premix annular flow enter the combustion chamber vertically upward, fire burns is being descended in preheating at combustion chamber backflow vortex, turn back downwards through hemispherical vault 1a place again, with the interaction of last gaseous blast under form the backflow vortex, the traction of backflow vortex relatively low pressure forms uniform flue gas stream down and flows out the combustion chamber, two kinds of air-flows of coal gas and air liquidate in the premix circuit 6 in little space and mix, can effectively realize the premix quickly and evenly of two kinds of air-flows, enter the combustion chamber and realize the large-area premixed combustion of (high strength) fully thereafter, simultaneously, in the elder generation of air-flow move down and cause the backflow flow field in the back, be allowed to condition at the steady air flow flow field, even exit flow, the effect of preheating premixed flow is not fully exerted, and satisfies the premix fully fast of coal gas and air draught, (high strength) burning fully, and the uniform and stable flue gas stream that enters the combustion chamber.
Burner of the present invention is simple in structure, and the premix circuit has only been adopted in the formation of premixed flow, and coal gas and air nozzle all are the emple holes facing to the premixed circuit, makes with installation (or building by laying bricks or stones) difficulty obviously to descend, and its stability of structure also improves thereupon.
Since coal gas and air-spray little space aim at wall jet and after the vault that annular premixed flow is upwards sprayed and flue gas flows turn back, this burner can effectively be realized the quick premix of coal gas and air-spray, abundant preheating refluxes, in time fire burns, this has just effectively reduced excess air coefficient, combustion intensity and ignition temperature have been improved, thereby thoroughly solved the low-heat value gas combustion instability, combustion intensity is not high, key issues such as ignition temperature is low, its performance obviously are better than other burner that the mixed combustion apparatus and the parallel injection mixed combustion apparatus equivalent type that is staggered are sprayed in layering.
Four, description of drawings
Fig. 1 is the whole profile of burner of the present invention.
Fig. 2 is for being the whole vertical view of burner of the present invention.
Five, the specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.
Shown in Fig. 1,2, burner of the present invention is the cylindrical shape wall body structure 1 of upper end closed, its blind end is hemispherical vault 1a, building (making) by laying bricks or stones by refractory material forms, its hollow space is combustion chamber 1b, and coal gas circuit 2 and 3, two circuits of air circuit of building the square-section of (making) ring-type in its cylindrical wall by laying bricks or stones are layout up and down, the outside of coal gas circuit 2 is connected with gas inlet pipe 7, and the outside of air circuit 3 is connected with air intake duct 8; One end of jet for gas 4 and air nozzle 5 communicates with separately circuit inboard respectively, and the other end is opened on premix circuit 6 outer side surfaces; Jet for gas 4 is to arrange up and down with air nozzle 5, the longitudinal section of jet for gas and air nozzle is highly big and the little rectangular aperture of width, and with premix circuit 6 outer side surface quadratures, its cross section is a tapered configuration, the import large outlet is little, progressively shrinks along the air current flow direction; The number of jet for gas 4 or air nozzle 5 selects according to the thermic load size of burner, nozzle flow velocity and the diameter of burner is decided, generally corresponding selection between 10～40 of each leisures; Premix circuit 6 is the square-section circuit of upper opening, and coaxial arrangement is on the wall of combustion chamber.Like this coal gas and air through separately inlet tube enter distribute circuit after the nozzle premix in the premix circuit by separately again, enter the combustion chamber with the jet-stream wind that ring-type makes progress thereafter, flow out the combustion chamber by the vault back of turning back again.
In the specific implementation, said jet for gas 4 is rectangle or circle with air nozzle 5 its cross sections, and its sectional area is that import department is big, and the exit is little, is diminishing planform along airflow direction; Said jet for gas 4 and air nozzle 5, its airflow direction are all perpendicular to premix circuit 6 and combustion chamber 1b, and its number is 10-40, is evenly arranged on premix circuit and the combustion chamber 1b; Described coal gas circuit 2, air circuit 3 is the square-section, be up and down to arrange, respectively at gas inlet pipe 7 and 8 orthogonal thereto or tangential connections of air intake duct; Described premix circuit 6 its axis are vertical mutually with the axis of jet for gas 4 and air nozzle 5, and are parallel to each other with the combustion chamber axis.
When burner was used for hot-blast stove, the pyramidal structure top of combustion chamber that burner is arranged on the top of chamber of hot-blast stove chamber with one heart or enlarges gradually so that swirling eddy forms the backflow vortex therein, played the effect of the retention flame and steady air flow; The labyrinth syndeton of separating for thermal stress between burner and regenerator or the combustion chamber (is not drawn the burner independent support) on hot-air stove shell among the figure, it is integrally-built stable to be beneficial to hot-blast stove.
When burner is used for industrial furnace, burner should be installed on the furnace wall of burning zone of industrial furnace, allow the ejection end of burner with different angles towards furnace cavity, and formed the burning zone of industrial furnace together.The number, position and the size that are arranged in burner on the burning zone are decided by the thermic load and the temperature requirement of industrial furnace, and its fixing means can adopt various ways.But burner main body structure shape is constant.
In a word, the present invention is with simple and unique structure, utilize the Field Characteristics of impingement wall wall jet effectively to strengthen mixed effect between jet, strengthened combustion process, improved combustion intensity, in the utilization spray turn back flow to produce return-flow structure with the retention flame, stablize the flow process field, with the uniform air flow distribution. Obviously, adopt that this burner just can guarantee effectively that hot-blast stove, industrial furnace etc. are efficient, samming, high-heat strength and the operation of safety and stablization ground, then realize fuel saving, saving investment, reduction EGT and discharge capacity, environmental contamination reduction, thereby produce good economic benefit and social benefit.
Claims (7)
1. the premixed annular airflow upper spraying, combustion burner of turning back and flowing out, it is characterized in that, this burner is a ball tip circle tubular under shed structure, cylinder body of wall (1) and hemispherical vault (1a) constitute can make the premixed flow flow burning combustion chamber (1b), arranged apart up and down in cylinder body of wall (1) inwall have top coal gas circuit (2) and a following air circuit (3), coal gas circuit inner circumferential is evenly arranged the jet for gas (4) of square-section, and air circuit inner circumferential is evenly arranged the air nozzle (5) of square-section; Coal gas circuit (2) is connected gas inlet pipe (7) and air intake duct (8) respectively with the outside of air circuit (3); The spout of two kinds of nozzles communicates with premix circuit (6) outside vertical; Premix circuit (6) is the circular passage of upper opening in the square-section of combustion chamber, and link to each other with combustion chamber (1b) inwall close coaxial, coal gas enters jet for gas (4) after entering coal gas circuit (2) by gas inlet pipe (7) again, and vertical then the injection enters premix circuit (6); Simultaneously, air enters air circuit (3) by air intake duct (8) and flows into air nozzle (5) again, and vertical then the injection enters premix circuit (6); Coal gas injects directly on the relative wall of premix circuit with air-spray, disperse to cause two kinds of mutual fully and apace mixing of air-flow around the jet air-flow, premix circuit (6) opening upwards, make the premix annular flow enter the combustion chamber vertically upward, fire burns is being descended in preheating at combustion chamber backflow vortex, locate to turn back downwards through hemispherical vault (1a) again, with the interaction of last gaseous blast under form the backflow vortex, the traction of backflow vortex relatively low pressure forms uniform flue gas stream down and flows out the combustion chamber, two kinds of air-flows of coal gas and air liquidate in the premix circuit (6) in little space and mix, can effectively realize the premix quickly and evenly of two kinds of air-flows, enter the combustion chamber and realize large-area premixed combustion completely thereafter, simultaneously, in the elder generation of air-flow move down and cause the backflow flow field in the back, be allowed to condition at the steady air flow flow field, even exit flow, the effect of preheating premixed flow is not fully exerted, and satisfies the premix fully fast of coal gas and air draught, completing combustion, and the uniform and stable flue gas stream that enters the combustion chamber.
2. the burner that premixed annular airflow upper spraying, combustion according to claim 1 is turned back and flowed out, it is characterized in that, said jet for gas (4) is rectangle or circle with its cross section of air nozzle (5), its sectional area is that import department is big, the exit is little, is diminishing planform along airflow direction.
3. the burner that premixed annular airflow upper spraying, combustion according to claim 1 and 2 is turned back and flowed out, it is characterized in that, said jet for gas (4) and air nozzle (5), its airflow direction is all perpendicular to premix circuit (6) and precombustion chamber (1b), its number is 10-40, is evenly arranged on premix circuit and the combustion chamber (1b).
4. the burner that premixed annular airflow upper spraying, combustion according to claim 1 is turned back and flowed out, it is characterized in that, described coal gas circuit (2), air circuit (3) is the square-section, be up and down and arrange, respectively at or tangential be connected orthogonal thereto with air intake duct (8) with gas inlet pipe (7).
5. the burner that premixed annular airflow upper spraying, combustion according to claim 1 is turned back and flowed out, it is characterized in that, its axis of described premix circuit (6) is vertical mutually with the axis of air nozzle (5) with jet for gas (4), and is parallel to each other with the combustion chamber axis.
6. the burner that premixed annular airflow upper spraying, combustion according to claim 1 is turned back and flowed out, it is characterized in that, when said burner is used for hot-blast stove, burner is symmetricly set on the top of chamber of hot-blast stove with one heart, the labyrinth syndeton of separating for thermal stress between burner and the regenerator chamber, be supported on the hot-air stove shell, it is integrally-built stable to be beneficial to hot-blast stove.
7. the burner that premixed annular airflow upper spraying, combustion according to claim 1 is turned back and flowed out, it is characterized in that, when said burner is used for industrial furnace, burner is installed on the furnace wall of burning zone of industrial furnace, the ejection end of burner towards furnace cavity, is formed the burning zone of industrial furnace with different angles together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010124032 CN101793396A (en) | 2010-03-15 | 2010-03-15 | Combustion device for upper spraying, combustion, exhumation and outflow of premixed annular airflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010124032 CN101793396A (en) | 2010-03-15 | 2010-03-15 | Combustion device for upper spraying, combustion, exhumation and outflow of premixed annular airflow |
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| CN101793396A true CN101793396A (en) | 2010-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010124032 Pending CN101793396A (en) | 2010-03-15 | 2010-03-15 | Combustion device for upper spraying, combustion, exhumation and outflow of premixed annular airflow |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103014211A (en) * | 2013-01-17 | 2013-04-03 | 陈维汉 | Combustion device in orthogonally jetting and mixing accumulator of flat nozzle |
| CN107208929A (en) * | 2015-01-26 | 2017-09-26 | 菲斯曼公司 | Boiler |
| CN111578282A (en) * | 2020-06-05 | 2020-08-25 | 郑州釜鼎热能技术有限公司 | High-speed rotational flow premixing combustion device with controllable performance of air-cooled combustion channel |
| CN112781047A (en) * | 2021-02-03 | 2021-05-11 | 郑州釜鼎热能技术有限公司 | Air injection gas premixing entrainment smoke preheating heat accumulator combustion device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH109518A (en) * | 1996-06-21 | 1998-01-16 | Osaka Gas Co Ltd | Low nox burner |
| CN1858492A (en) * | 2005-04-30 | 2006-11-08 | 武汉冶金建筑研究院 | Multiple fire hole flame-free ceramic burner |
| CN1869250A (en) * | 2006-06-29 | 2006-11-29 | 郑州豫兴耐火材料有限公司 | Ring body multi-hole short flame burner |
| CN201306713Y (en) * | 2008-11-27 | 2009-09-09 | 河南省豫兴热风炉工程技术有限公司 | Burner with nozzle of swirl injection pre-combustion chamber arranged in circular and staggered mode |
| CN201599794U (en) * | 2010-03-15 | 2010-10-06 | 郑州豫兴耐火材料有限公司 | Combustion device with premixing annular airflow ejecting upwards, returning and outflowing |
-
2010
- 2010-03-15 CN CN 201010124032 patent/CN101793396A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH109518A (en) * | 1996-06-21 | 1998-01-16 | Osaka Gas Co Ltd | Low nox burner |
| CN1858492A (en) * | 2005-04-30 | 2006-11-08 | 武汉冶金建筑研究院 | Multiple fire hole flame-free ceramic burner |
| CN1869250A (en) * | 2006-06-29 | 2006-11-29 | 郑州豫兴耐火材料有限公司 | Ring body multi-hole short flame burner |
| CN201306713Y (en) * | 2008-11-27 | 2009-09-09 | 河南省豫兴热风炉工程技术有限公司 | Burner with nozzle of swirl injection pre-combustion chamber arranged in circular and staggered mode |
| CN201599794U (en) * | 2010-03-15 | 2010-10-06 | 郑州豫兴耐火材料有限公司 | Combustion device with premixing annular airflow ejecting upwards, returning and outflowing |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103014211A (en) * | 2013-01-17 | 2013-04-03 | 陈维汉 | Combustion device in orthogonally jetting and mixing accumulator of flat nozzle |
| CN107208929A (en) * | 2015-01-26 | 2017-09-26 | 菲斯曼公司 | Boiler |
| CN107208929B (en) * | 2015-01-26 | 2021-02-19 | 菲斯曼公司 | Boiler |
| CN111578282A (en) * | 2020-06-05 | 2020-08-25 | 郑州釜鼎热能技术有限公司 | High-speed rotational flow premixing combustion device with controllable performance of air-cooled combustion channel |
| CN111578282B (en) * | 2020-06-05 | 2022-03-29 | 郑州釜鼎热能技术有限公司 | High-speed rotational flow premixing combustion device with controllable performance of air-cooled combustion channel |
| CN112781047A (en) * | 2021-02-03 | 2021-05-11 | 郑州釜鼎热能技术有限公司 | Air injection gas premixing entrainment smoke preheating heat accumulator combustion device |
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Open date: 20100804 |