CN201306714Y - Backblowing type external premixing high-speed current equalizing burner for industrial furnace - Google Patents
Backblowing type external premixing high-speed current equalizing burner for industrial furnace Download PDFInfo
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- CN201306714Y CN201306714Y CNU2008202213498U CN200820221349U CN201306714Y CN 201306714 Y CN201306714 Y CN 201306714Y CN U2008202213498 U CNU2008202213498 U CN U2008202213498U CN 200820221349 U CN200820221349 U CN 200820221349U CN 201306714 Y CN201306714 Y CN 201306714Y
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- burner
- air
- gas
- pipe
- nozzle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model relates to a backblowing type external premixing high-speed current equalizing burner for an industrial furnace, which effectively solves the problems of sufficient combustion, even and high-efficiency heat transfer, and the improvement of the production efficiency of the burner. The burner has the structure that a combustion chamber is arranged on the lower part inside the burner body; an air distribution chamber is arranged in the spherical wall surface of the combustion chamber; the inner wall surface at the upper end of the air distribution chamber is provided with air nozzles to the end surfaces of the nozzles; the cylinder wall at the upper part of the burner body is internally provided with a coaxial gas distribution loop with a rectangular section and coal gas nozzles connected with the coal gas distributions loop to the end surfaces of the nozzles; the end surfaces of the nozzles are provided with the coal gas nozzles and the air nozzles which are connected in a circular and staggered mode end to end; the coal gas distributions loop is provided with a coal gas inlet pipe arranged on the outer wall of the burner body; the air distribution chamber is connected with an air inlet pipe; and an annular flame stabilizing trough with a triangular section is arranged on an outlet passage of the burner. The utility model can smoothly achieve ejection and premixing, reflux and preheating and stable combustion of coal gas and air, and effectively solve the key problems of unstable combustion, low combustion intensity and low combustion temperature of low-heat value coal gas.
Description
One, technical field
The utility model relates to burner, particularly a kind of industrial furnace back flushing type external premixed high-speed flow equalization combustor.
Two, background technology
Burner is the indispensable core apparatus of burning class stove equipment, and whether good its performance and structure be directly has influence on fuel availability, the thermal efficiency of stove and whether satisfy energy conservation and environment protection.At present, widely used various burners are nothing more than high pressure or the diffusion combustion of low-pressure nozzle burner and burning gases or the burner of premix (half premix) burning of the powdered coal burner that the burning solid powder is arranged, combustion of liquid fuel.Various burners all have significant progress and innovation at different industry fields, its effect separately of performance in various fuel-fired furnaces.Finished from sleeve type burner for the burner that adopts diffusion combustion mode, progressively carry out the transition to the conversion of the rectangle burner of comb shape air nozzle, and develop into that the annular steady flame combustion technology of multiple nozzle spraying eddy flow mixing backflow preheat or annular multiinjector are staggered goes up the steady flame overheavy firing of air-flow turn-back pre-heating technology after the spray premixed combustion.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, especially use the burner of the producer gas on industrial furnace, since structure unreasonable and with the combustion chamber cooperate improper, often cause coal gas mix with air not good and (or) air-flow distribute inhomogeneous, cause problems such as incomplete combustion or combustion instability, heat load adjustment poor performance to occur therefrom.Therefore, improve the structure of burner, and make itself and furnace cavity form reasonable flow field structure, with the perfect adaptation that realizes that high-intensity combustion and uniform high-efficiency conduct heat, should be direction and the technical issues that need to address and the technical issues that need to address of burner development.
Three, utility model content
At above-mentioned situation, for overcoming the prior art defective, the purpose of this utility model is to provide a kind of industrial furnace back flushing type external premixed high-speed flow equalization combustor, the abundant burning and the uniform high-efficiency that can effectively solve burner conduct heat, the problem of enhancing productivity, the technical scheme of its solution is, include burner body, the combustion chamber, air intake pipe and gas entry pipe, the combustion chamber that air-flow is turned back is arranged at the bottom in the burner body, be provided with the air distribution chamber chamber in the hemispherical wall of combustion chamber, even air bleed blast tube arrives nozzle face downwards through transferring on its upper end internal face; The coal gas that is provided with coaxial square-section in burner body top cylinder wall distributes circuit, evenly draws the jet for gas pipe on the circuit in it, and arrives nozzle face downwards through transferring; The staggered ringwise end to end layout of jet for gas and air nozzle is arranged on nozzle face, form the burner nozzle of annular, be connected to the gas entry pipe that is contained on the burner body outer wall on coal gas distribution circuit, air distribution chamber is joined with the air intake pipe that is equipped with on the burner body lower tip; The burner outlet passage is provided with the steady flame groove of annular of triangular-section.
The utility model burner can be realized injection premix, backflow preheat, the smooth combustion of coal gas and air smoothly, thereby efficiently solves low-heat value gas combustion instability, low, the not high key issue of ignition temperature of combustion intensity.
Four, description of drawings
Fig. 1 is the utility model burner sectional front view.
Fig. 2 is the gas entry pipe place sectional top view of the utility model burner.
Fig. 3 is nozzle ejection cross section, the end upward view of the utility model burner.
Five, the specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is explained in detail.
Provide by Fig. 1-Fig. 3, the utility model includes burner body, combustion chamber, air intake pipe and gas entry pipe, the combustion chamber 1 that air-flow is turned back is arranged at the bottom in the burner body, be provided with air distribution chamber chamber 2 in the hemispherical wall of combustion chamber, even air bleed blast tube 3 arrives nozzle face 4 downwards through transferring on its upper end internal face; The coal gas that is provided with coaxial square-section in burner body 5 top cylinder walls distributes circuit 6, evenly draws jet for gas pipe 7 on the circuit in it, and arrives nozzle face 4 downwards through transferring; The staggered ringwise end to end layout of jet for gas 7a and air nozzle 3a is arranged on nozzle face 4, form the burner nozzle of annular, be connected to the gas entry pipe 8 that is contained on burner body 5 outer walls on coal gas distribution circuit 6, air distribution chamber chamber 2 joins with the air intake pipe 9 that is equipped with on burner body 5 lower tip; The burner body exit passageway is provided with the steady flame groove 10 of annular of triangular-section.
In order to guarantee result of use, said burner body 5 is the cylindrical shape cup-shaped structure of end sealing, its blind end is the combustion chamber 1 of hemispherical space, hollow space constitutes hemispherical air distribution chamber chamber 2 in the burner body of hemisphere portion, equally distributed air nozzle pipe 3 is circumferentially drawn in its upper edge, upper level cross section, and 90 ° of air nozzle 3a downward and on the burner nozzle end face 4 that turn back are connected; There is the rectangular cross section coal gas of annular to distribute circuit 6 in the combustion chamber cylindrical shape burner body 5 on 1 top, combustion chamber of hemispherical space, the circumferential equally distributed jet for gas pipe 7 in the edge of connection is arranged at its top, and the jet for gas pipe is turned back 90 ° and is connected with the jet for gas 7a on the nozzle face 4 downwards; Jet for gas and air nozzle are staggered and arrange and end to end toroidal on the burner nozzle end face; Gas entry pipe 8 distributes 6 vertical connections of circuit with coal gas; Air intake pipe 9 inserts hemispherical air distribution chamber chamber 2 from the next top, combustion chamber; Steady flame groove 10 cutout on the wall of burner body internal channel of annular, endless groove triangular in shape.
Here be necessary to point out:
The number of air nozzle pipe 3 or jet for gas pipe 7 is decided according to the thermic load size of burner and the diameter of burner, generally corresponding selection between 20～40 of each leisures; The angle that enters the combustion chamber of air nozzle pipe 3 or jet for gas pipe 7 can be in relative axis changes in 0 °～30 ° the angular range; It can be circle or rectangle that air nozzle pipe 3 or jet for gas pipe 7 are selected with the cross-sectional geometry of air nozzle 3a or jet for gas 7a, and nozzle cross-section can progressively be retracted to suitable size to the combustion chamber.
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 the structural form of burner body is constant.
The steady flame groove 10 of annular is triangle endless grooves of cutout on the wall of burner internal channel, its objective is and play steady flame effect under high load capacity; Should adjust its shape, size and position according to burner load variations scope, its cross section can be that triangle can be that rectangle does not wait.
When using said burner, coal gas and air enter distribution of air flow circuit or chamber separately, after the preheating via separately blast tube enter the combustion chamber, when mutually mixing, further be subjected to refluxing flue gas preheating and fire burns, burning back flue gas stops through the combustion chamber and turns back and upwards flow out and enter furnace cavity from the central space of annular burner.In this process, can form a backflow vortex between descending mixed airflow and the up flue gas stream, air upflow under its effect can to around separately form and enter furnace cavity after being similar to VELOCITY DISTRIBUTION mobile in the pipe.The high temperature reflux flue gas also can make descending mixed airflow obtain abundant preheating, causes mist shifting to an earlier date fire burns and strengthens combustion intensity, and make combustion flame stable because of continuous action.Air velocity distribution two even to the invigoration effect of burning and the speed that the stepless action of exit flow formed the burner outlet air-flow and temperature of turning back owing to rising.The annular steady flame groove 10 at burner outlet place can not make when heavy-duty service and fully burn and flammable mixed being so incensed that with completing combustion, finishes in burner to guarantee combustion process.Because the air distribution chamber chamber of burner and coal gas distribute circuit not only to play the effect of cool burner wall but also air-flow is preheated, this can improve the temperature of coal gas and air and promote fire burns and improving the hot-fluid rate.
In a word, the utility model is with simple and rational structure, solved the burner jet-stream wind effectively and mixed not good, key issues such as burning is insufficient, combustion-gas flow speed temperature distributing disproportionation, can guarantee effectively that industrial furnace is efficient, samming, etc. calorific intensity and the operation of safety and stablization ground; Thereby can realize fuel saving, save investment, reduce the good economic and social benefit of EGT and discharge capacity, minimizing environmental pollution.
Claims (7)
1, a kind of industrial furnace back flushing type external premixed high-speed flow equalization combustor, include burner body, combustion chamber, air intake pipe and gas entry pipe, it is characterized in that, the combustion chamber (1) that air-flow is turned back is arranged at the bottom in the burner body, be provided with air distribution chamber chamber (2) in the hemispherical wall of combustion chamber, even air bleed blast tube (3) arrives nozzle face (4) downwards through transferring on its upper end internal face; The coal gas that is provided with coaxial square-section in burner body (5) top cylinder wall distributes circuit (6), evenly draw jet for gas pipe (7) on the circuit in it, and through the arrival nozzle face (4) downwards of transferring, the staggered ringwise end to end layout of jet for gas (7a) and air nozzle (3a) is arranged on nozzle face (4), form the burner nozzle of annular, be connected to the gas entry pipe (8) that is contained on burner body (5) outer wall on coal gas distribution circuit (6), air distribution chamber chamber (2) join with the air intake pipe (9) that is equipped with on burner body (5) lower tip; The burner body exit passageway is provided with the steady flame groove (10) of annular of triangular-section.
2, industrial furnace back flushing type external premixed high-speed flow equalization combustor according to claim 1, it is characterized in that, said burner body (5) is the cylindrical shape cup-shaped structure of end sealing, its blind end is the combustion chamber (1) of hemispherical space, hollow space constitutes hemispherical air distribution chamber chamber (2) in the burner body of hemisphere portion, equally distributed air nozzle pipe (3) is circumferentially drawn in its upper edge, upper level cross section, and 90 ° of air nozzles (3a) downward and on the burner nozzle end face (4) of turning back are connected.
3, industrial furnace back flushing type external premixed high-speed flow equalization combustor according to claim 1 and 2, it is characterized in that, there is the rectangular cross section coal gas of annular to distribute circuit (6) in the combustion chamber cylindrical shape burner body (5) on top, said combustion chamber (1), the circumferential equally distributed jet for gas pipe in the edge of connection (7) is arranged at its top, and the jet for gas (7a) that the jet for gas pipe is turned back on 90 ° of downward same nozzle faces (4) is connected.
4, industrial furnace back flushing type external premixed high-speed flow equalization combustor according to claim 1 is characterized in that, said jet for gas and air nozzle are staggered and arrange and end to end toroidal on the burner nozzle end face.
5, industrial furnace back flushing type external premixed high-speed flow equalization combustor according to claim 1, it is characterized in that, said gas entry pipe (8) distributes vertical connection of circuit (6) with coal gas, and air intake pipe (9) inserts hemispherical air distribution chamber chamber (2) from the next top, combustion chamber.
6, industrial furnace back flushing type external premixed high-speed flow equalization combustor according to claim 1 is characterized in that, said air nozzle pipe (3) or jet for gas pipe (7) are 20～40, and the angle that enters the combustion chamber is 0～30 ° of relative axis.
7, industrial furnace back flushing type external premixed high-speed flow equalization combustor according to claim 1, it is characterized in that, said air nozzle pipe (3) or jet for gas pipe (7) are circle or rectangle with the cross section of air nozzle (3a) or jet for gas (7a), and are progressively contraction-like to the combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202213498U CN201306714Y (en) | 2008-11-27 | 2008-11-27 | Backblowing type external premixing high-speed current equalizing burner for industrial furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202213498U CN201306714Y (en) | 2008-11-27 | 2008-11-27 | Backblowing type external premixing high-speed current equalizing burner for industrial furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201306714Y true CN201306714Y (en) | 2009-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202213498U Expired - Lifetime CN201306714Y (en) | 2008-11-27 | 2008-11-27 | Backblowing type external premixing high-speed current equalizing burner for industrial furnace |
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|---|---|
| CN (1) | CN201306714Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112728971A (en) * | 2020-12-30 | 2021-04-30 | 西安交通大学 | Preheating device in nuclear thermal propulsion system |
-
2008
- 2008-11-27 CN CNU2008202213498U patent/CN201306714Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112728971A (en) * | 2020-12-30 | 2021-04-30 | 西安交通大学 | Preheating device in nuclear thermal propulsion system |
| CN112728971B (en) * | 2020-12-30 | 2021-10-19 | 西安交通大学 | Preheating device in nuclear thermal propulsion system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090909 Effective date of abandoning: 20081127 |