CN201652354U - High-speed energy-saving ceramic kiln burning nozzle - Google Patents
High-speed energy-saving ceramic kiln burning nozzle Download PDFInfo
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- CN201652354U CN201652354U CN2010201640318U CN201020164031U CN201652354U CN 201652354 U CN201652354 U CN 201652354U CN 2010201640318 U CN2010201640318 U CN 2010201640318U CN 201020164031 U CN201020164031 U CN 201020164031U CN 201652354 U CN201652354 U CN 201652354U
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- burner
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Abstract
The utility model discloses a high-speed energy-saving ceramic kiln burning nozzle, mainly comprising an air inlet pipe, a gas inlet pipe, a mixer, a burning nozzle pipe, an ignition device, a combustion chamber and a burning nozzle brick, wherein the gas inlet pipe and the air inlet pipe are coaxially distributed; the air inlet pipe covers the outside of the gas inlet pipe; and the burning nozzle pipe is a spraying nozzle which is reduced gradually and expanded gradually, and can fully utilize the pressure energy of mixed gas to obtain supersonic outlet air flow speed. The high-speed energy-saving ceramic kiln burning nozzle can enhance the air flow in the kiln to circulate, strengthen the convective heat transfer between the air flow and products, lead the temperature of the kiln to be uniform, reduce the temperature difference between the upper surface and the lower surface of a workpiece, is very beneficial to improving heating quality of the workpiece and saving energy, improves the combustion heat efficiency, and can be widely used for various industrial ceramic gas kilns.
Description
Technical field
The utility model relates to a kind of burner, particularly a kind of high-speed and energy-saving ceramic kiln burner.
Background technology
The thermal process of ceramic kiln is heat transfer, burning, the comprehensive function of gas flow in the firing ceramics process, relates to basic principles such as hydrodynamics, thermal conduction study, Combustion.By setting up basic conservation equation group such as continuity equation, the equation of momentum, energy equation, composition equation, tubulence energy equation, numerical simulation study shows that combustion gas atmosphere, pressure, temperature, combustion gas are very big to the distribution influence of manufactured goods temperature field, kiln temperature field and kiln flow field from primary condition such as the spouting velocity of burner and boundary condition.And the factor that determines these primary condition mainly contains structure and layout, burner jet velocity and direction, the speed of the interior flow of flue gas of kiln and the kind of fuel etc. of burner.Such as, control the injection direction of fuel or flue gas by the setting angle of regulating burner or nozzle, satisfy the kiln temperature demand; The entrance velocity of change flue gas improves the uniformity of kiln temperature etc.Therefore, the design effect of burner directly has influence on the distribution of kiln temperature, and then has influence on the upper and lower temperature difference of manufactured goods.Reasonably nozzle structure design and layout both be convenient to the adjusting of kiln temperature, were beneficial to the strong disturbance and the circulation of airstream in kiln again, thereby had improved the heat exchange rate of interior gas of kiln and goods, had improved the uniformity of section temperature in the kiln.
The developing direction of advanced ceramics Industrial Stoves is lightness, coal gasification, roller-wayization and automation, burner is the core component of kiln burning, also be the basis of kiln, can burner satisfy the requirement of furnace construction and goods firing process, having a strong impact on ceramic economic benefit of enterprises.Traditional ceramics industry nozzle exists incomplete combustion, easily coking, stop up flame instability, easily take off the length and the difficult control of temperature of fire and back fire flame, to problems such as different types of combustion gas or fuel oil bad adaptability, caused the temperature of kiln wall too high, the life-span of having lowered kiln body and burner block.For addressing this problem, normally improve the gas spouting velocity of burner, the development high combustion rate burner.High combustion rate burner has been widely used in various solid fuels, liquid fuel and gas fuel combustion at present, and it can significantly improve kiln temperature uniformity, shortens firing time greatly, makes furnace performance that qualitative leap arranged.In the early stage high velocity temperature adjusting burner, primary air is used for burning, and auxiliary air then is used for temperature adjustment, and the two sends into burner respectively.But this nozzle structure complexity is bulky, and connecting pipe is also complicated, and the highest gas spouting velocity is also only at 150-300m/s.
The utility model content
The purpose of this utility model is to provide a kind of high-speed and energy-saving type ceramic kiln burner, thereby improves the spouting velocity of gas, the convection heat transfer' heat-transfer by convection between strengthening flow and goods effectively, evenly furnace temperature, reduce the temperature difference between the workpiece upper and lower surface, improve combustion thermal efficiency.
The technical solution that realizes the utility model purpose is: a kind of high-speed and energy-saving ceramic kiln burner, comprise air intake duct, gas inlet pipe, blender, the burner pipe, igniter, combustion chamber and burner block, gas inlet pipe is positioned at air intake duct inside, the two is coaxial, blender is arranged at air intake duct and the common end of gas inlet pipe, the other end of blender is provided with the burner pipe, flaring behind the bore elder generation convergent of described burner pipe, the other end of burner pipe connects the combustion chamber, the place ahead, gas outlet of burner pipe is provided with igniter, and burner block is arranged on air inlet pipe, gas inlet pipe, blender, the burner pipe, the outside of igniter.
The utility model compared with prior art, its remarkable advantage: can drive from the high velocity air of burner ejection that gas circulates in the kiln, strong stirring action is arranged, impel the gas stream in the stove circulation, but therefore adopt the convection heat transfer' heat-transfer by convection between high velocity temperature adjusting burner strengthening flow and goods, even furnace temperature, the temperature difference between flame and workpiece that reduces are to improving workpiece heating quality and energy-conservation very favourable; Combustion chamber volume is little, and heat dissipation capacity is little, can improve combustion thermal efficiency, eliminates hot spot in the kiln, reduces the accumulation of heat loss and the radiation loss of kiln body, and is favourable to development high temperature kiln and saving of fuel; Concentration of oxygen can control to minimum amount in the combustion process, reduces the NO that generates in the flue gas
xContent.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Description of drawings
Accompanying drawing is a high-speed and energy-saving ceramic kiln nozzle structure schematic diagram of the present utility model.
The specific embodiment
In conjunction with the accompanying drawings, a kind of high-speed and energy-saving ceramic kiln burner of the present utility model, comprise air intake duct 1, gas inlet pipe 2, blender 3, burner pipe 4, igniter 5, combustion chamber 6 and burner block 7, gas inlet pipe 2 is positioned at air intake duct 1 inside, the two is coaxial, blender 3 is arranged at the common end of air intake duct 1 and gas inlet pipe 2, the other end of blender 3 is provided with burner pipe 4, flaring behind the bore elder generation convergent of described burner pipe 4, the other end of burner pipe 4 connects combustion chamber 6, the place ahead, gas outlet of burner pipe 4 is provided with igniter 5, and burner block 7 is arranged on air inlet pipe 1, gas inlet pipe 2, blender 3, burner pipe 4, the outside of igniter 5.The taper angle of burner pipe 4, flaring angle are 15-45 °, and the flaring angle is the line of aditus laryngis, gas outlet and the angle of central shaft, and taper angle is the line of aditus laryngis, air inlet and the angle of central shaft.
High combustion rate burner is made up of air intake duct 1, gas inlet pipe 2, blender 3, burner pipe 4, igniter 5, combustion chamber 6 and burner block 7.Air intake duct 1 is air-supplied through air control valve, and mixes blender 3 by the natural gas that gas control valve enters from gas inlet pipe.On air intake duct and gas inlet pipe, respectively install control valve, but so both ratio of flexible modulation air and natural gas, can control the air inlet amount again, thereby effectively control the temperature of combustion chamber, make burning gas temperature keep the temperature that is close with the workpiece heating-up temperature.Gas inlet pipe 2, air intake duct 1 the two coaxial arrangement.Air intake duct 1 covers in the outside of gas inlet pipe 2, and communicates with blender by the air intake aperture that is positioned at blender 3.
The burner pipe 4 that is connected on the blender 3 is a kind of first convergent nozzles of flaring then, and this nozzle can make full use of the pressure of mist can be to obtain supersonic exit flow speed.When the ratio of the environmental stress in the kiln and stagnation pressure during less than a certain critical value, combustion gas and Air mixing gas can quicken at the converging transition of nozzle, be that nozzle minimum cross section place reaches critical speed in throat; Can further quicken at divergent segment gas then, make remaining pressure can be converted into kinetic energy to obtain supersonic air velocity.When air-flow was the subsonic speed air-flow, then air-flow quickened in collapsible tube, and slowed down in convergent divergent channel; When air-flow is supersonic flow, in collapsible tube, slow down, in convergent divergent channel, quicken.Therefore, the duty of this burner can be passed through the ratio of interior environmental stress of control kiln and outlet stagnation pressure, thus the variation of control mixed airflow speed in burner, and the realization air velocity can be in harmonious proportion and spray at a high speed.The spouting velocity of this burner more than 100m/s, reaches as high as 200-400m/s usually.And traditional burner is below 70m/s, and some known high combustion rate burners are also only up to 200-300m/s.This high spouting velocity of shrinking earlier the burner generation of afterwards expand, it is mobile to drive the interior gas circulation of kiln, makes the kiln temperature field distribution more even more reasonable, and the product upper and lower temperature difference of burning till can be controlled in ± and 5 ℃.
Arrangement igniter 5 is lighted the torch of igniting near the burner pipe, makes it to fire prosperous, and the torch of will igniting stretches into stove inner nozzle appropriate location, regulates air and coal gas ratio, reaches optimal combustion state.With the combustion chamber 6 that high combustion rate burner tightly links to each other, have very high volume calorific intensity, can reach 2.1 * 10
8W/m
3, combustion chamber volume is little, and heat radiation is few, the combustion thermal efficiency height.Burner block 7 has constituted the combustion chamber inwall in the kiln, can guarantee the intensity of kiln kiln wall, strengthens the insulation of kiln kiln wall.The material of burner block can be corundum-mullite burner block, corundum burner block, fused alumina zirconia burner block, sillimanite burner block, zircon burner block, Zirconium corundum burner block.The burner block of these kinds has advantages such as fabulous anti-thermal shock stability, elevated temperature strength, volume stability.But antiscour in use stands frequent temperature fluctuation effect and does not ftracture, do not peel off, long service life.
Reducing and expansion burner pipe will have rational physical dimension, and is complementary with the size and the burner layout of kiln.Use the jet pipe of this form to convert heat energy and pressure energy to kinetic energy, the gas mass flow that flows through jet pipe is a constant value, and to flow out jet pipe narrow narrow section when air-flow, gas expansion when nozzle throat is discharged, temperature and pressure reduces, thereby obtains high velocity air.Nozzle throat must have enough effective areas so that the unlikely obstruction of gas, but meanwhile also should not make the too fast effusion of gas, so that enough pressure can not be kept in the combustion chamber.The inclination angle of divergent segment and converging transition is generally 15-45 °, and converging transition is selected 30 ° in the present embodiment, and divergent segment is selected 20 °.Jet pipe must be able to be resisted flow velocity heat erosion very high, high temperature compressed gas, makes jet pipe keep interior shape constant at whole duration of work.The laval nozzle throat diameter can be selected 0.5-20cm, selects 1cm in the present embodiment.Reducing and expansion burner pipe can adopt two or more refractory ceramic material to make with burner block according to the different condition of work of reality, adopts corundum-mullite and corundum refractory in the present embodiment.Stagnation pressure as mist is 3 * 10
5During Pa, the spouting velocity of gas can reach 300m/s.
Claims (2)
1. high-speed and energy-saving ceramic kiln burner, it is characterized in that, comprise air intake duct [1], gas inlet pipe [2], blender [3], burner pipe [4], igniter [5], combustion chamber [6] and burner block [7], gas inlet pipe [2] is positioned at air intake duct [1] inside, the two is coaxial, blender [3] is arranged at air intake duct [1] and the common end of gas inlet pipe [2], the other end of blender [3] is provided with burner pipe [4], flaring behind the bore elder generation convergent of described burner pipe [4], the other end of burner pipe [4] connects combustion chamber [6], the place ahead, gas outlet of burner pipe [4] is provided with igniter [5], and burner block [7] is arranged on air inlet pipe [1], gas inlet pipe [2], blender [3], burner pipe [4], the outside of igniter [5].
2. high-speed and energy-saving ceramic kiln burner according to claim 1 is characterized in that the taper angle of burner pipe [4], flaring angle are 15-45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201640318U CN201652354U (en) | 2010-04-20 | 2010-04-20 | High-speed energy-saving ceramic kiln burning nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201640318U CN201652354U (en) | 2010-04-20 | 2010-04-20 | High-speed energy-saving ceramic kiln burning nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN201652354U true CN201652354U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201640318U Expired - Fee Related CN201652354U (en) | 2010-04-20 | 2010-04-20 | High-speed energy-saving ceramic kiln burning nozzle |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154538A (en) * | 2014-05-13 | 2014-11-19 | 邢良坤 | Multifunctional universal cyclone flaming nozzle |
| CN107893993A (en) * | 2018-01-03 | 2018-04-10 | 沈阳工程学院 | A kind of Self inhaling porous media heating furnace |
| CN108131672A (en) * | 2018-02-13 | 2018-06-08 | 项玮 | The low nitrogen nitride flat flame heat-accumulating burner of industrial furnace |
| CN109489035A (en) * | 2018-12-28 | 2019-03-19 | 中冶京诚(扬州)冶金科技产业有限公司 | A kind of low NOx drainage burner |
| CN109539252A (en) * | 2018-12-28 | 2019-03-29 | 中冶京诚(扬州)冶金科技产业有限公司 | A kind of high velocity burner |
| CN113280372A (en) * | 2021-06-25 | 2021-08-20 | 中国环境科学研究院 | Stove core for energy-saving stove and energy-saving stove |
-
2010
- 2010-04-20 CN CN2010201640318U patent/CN201652354U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154538A (en) * | 2014-05-13 | 2014-11-19 | 邢良坤 | Multifunctional universal cyclone flaming nozzle |
| CN104154538B (en) * | 2014-05-13 | 2017-01-18 | 邢良坤 | Multifunctional universal cyclone flaming nozzle |
| CN107893993A (en) * | 2018-01-03 | 2018-04-10 | 沈阳工程学院 | A kind of Self inhaling porous media heating furnace |
| CN108131672A (en) * | 2018-02-13 | 2018-06-08 | 项玮 | The low nitrogen nitride flat flame heat-accumulating burner of industrial furnace |
| CN108131672B (en) * | 2018-02-13 | 2024-03-12 | 项玮 | Low-nitride flat flame heat accumulating type burner of industrial furnace |
| CN109489035A (en) * | 2018-12-28 | 2019-03-19 | 中冶京诚(扬州)冶金科技产业有限公司 | A kind of low NOx drainage burner |
| CN109539252A (en) * | 2018-12-28 | 2019-03-29 | 中冶京诚(扬州)冶金科技产业有限公司 | A kind of high velocity burner |
| CN113280372A (en) * | 2021-06-25 | 2021-08-20 | 中国环境科学研究院 | Stove core for energy-saving stove and energy-saving stove |
| CN113280372B (en) * | 2021-06-25 | 2022-04-01 | 中国环境科学研究院 | Stove core for energy-saving stove and energy-saving stove |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20140420 |