CN105135430A - Steady-flame and low-nitrogen oxygen enrichment burner for solid fuel - Google Patents
Steady-flame and low-nitrogen oxygen enrichment burner for solid fuel Download PDFInfo
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- CN105135430A CN105135430A CN201510606989.5A CN201510606989A CN105135430A CN 105135430 A CN105135430 A CN 105135430A CN 201510606989 A CN201510606989 A CN 201510606989A CN 105135430 A CN105135430 A CN 105135430A
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- oxygen
- fuel
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- fuel nozzle
- road
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- 239000004449 solid propellant Substances 0.000 title claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 244
- 239000001301 oxygen Substances 0.000 claims abstract description 244
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 244
- 239000000446 fuel Substances 0.000 claims abstract description 138
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- 230000002411 adverse Effects 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000001590 oxidative effect Effects 0.000 claims description 12
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 11
- 229910001882 dioxygen Inorganic materials 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 10
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract 3
- 238000002485 combustion reaction Methods 0.000 description 21
- 239000007789 gas Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- KEUKAQNPUBYCIC-UHFFFAOYSA-N ethaneperoxoic acid;hydrogen peroxide Chemical compound OO.CC(=O)OO KEUKAQNPUBYCIC-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000012771 pancakes Nutrition 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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 invention discloses a steady-flame and low-nitrogen oxygen enrichment burner for solid fuel. A fuel and air mixed flow inlet of the burner is sequentially communicated with a fuel flow conveying pipe, a cyclone mixer and a fuel nozzle. An oxygen inlet is formed in a second oxygen guide pipe, a first oxygen guide pipe is sleeved with the second oxygen guide pipe, and an oxygen adjusting valve is arranged at an inlet of the first oxygen guide pipe. The fuel flow conveying pipe is sleeved with the first oxygen guide pipe. Oxygen coming from the oxygen inlet is divided into two oxygen flows through the oxygen adjusting valve, one oxygen flow enters the fuel nozzle through a first oxygen jet opening, and the other oxygen flow and fuel and air mixed flow together form a rotational flow in the fuel nozzle. The oxygen and the fuel and air mixed flow are mixed, so that a well-mixed oxygen enrichment fuel mixed flow is formed. The second oxygen flow in the second oxygen guide pipe is ejected from a second oxygen nozzle at a high speed, and the second oxygen flow ejected at the high speed forms a rotational flow field in a kiln. By means of the steady-flame and low-nitrogen oxygen enrichment burner, the torch coverage area can be increased, hot flow circulation in the kiln is promoted, and nitrogen oxide emission is lowered.
Description
Technical field
The present invention relates to a kind of burner, particularly a kind of steady flame low nitrogen solid fuel oxygen-enriched burner.
Background technology
Solid fuel is the mode of " combustion air+fuel " at the current more general combustion method of the application of Industrial Stoves, because the combustion adjuvant oxygen that can react with solid fuel in air only accounts for 21% of total tolerance, nitrogen accounts for 78% of total amount and enters kiln as without sharp gas, in kiln flame high temperature, generate discharging as waste gas of NOx will take away a large amount of heat energy, and a large amount of NOx thing fume treatment costs is very high.Simultaneously because oxygen content in air is low, solid fuel is difficult to abundant after-flame in short inch, leaving over uncombusted thing, having a strong impact on product quality by easily occurring in hot product.Though there is part enterprise to carry out oxygen-enriched combusting transformation but only obtained application on liquids and gases fuel at present, solid fuel does not also obtain fine extensive use by the impact of the factors such as conveying, Combustion System and burner performance.
The following problem of oxygen-enriched burner ubiquity in the past:
1, combustion flame is unstable;
2, flame local temperature is too high, the irregular weighing apparatus of Warm degree, and the generation of NOx can not get good control;
3, torch is short and small, width capping is not long-pending.
Summary of the invention
For the defect that prior art exists, the object of the invention is to propose a kind of steady flame low nitrogen solid fuel oxygen-enriched burner.It improves combustion stability, increase flame volume, reduces flame temperature, promotes kiln Inner hot fluid circulation and then effectively reduce NOx to be generated as object.Take to carry out oxygen and fuel-air mixed flow premixed form at burner internal, fuel nozzle utilizes venturi coaxial injector principle jet to spray, from fuel nozzle ports externally to methods such as kiln Inner high-speed jet oxygen supplys, promote that burner outlet continous-stable flame front is formed.Burner has the good effects such as flame brightness is high, flame temperature is balanced, NO_x formation is few, and furnace gas backflow is strong, torch width capping is large.
Technical scheme of the present invention is:
A kind of steady flame low nitrogen solid fuel oxygen-enriched burner, is characterized in that, comprise fuel-air mixed flow entrance, oxygen intake, oxygen regulating valve, cyclone mixer, oxygen jet, fuel nozzle, two road oxygen catheters, one oxygen catheter and flow in fuel carrier pipe; Fuel-air mixed flow entrance is communicated with flow in fuel carrier pipe, and the other end of described flow in fuel carrier pipe is connected with cyclone mixer, and cyclone mixer is connected with fuel nozzle; Fuel-air mixed flow is entered by fuel-air mixed flow entrance, enters cyclone mixer, then enter fuel nozzle through flow in fuel carrier pipe; Described oxygen intake is arranged on two road oxygen catheters, and be provided with one oxygen catheter in two road oxygen catheters, the porch of one oxygen catheter is provided with oxygen regulating valve; Described flow in fuel carrier pipe is sleeved in one oxygen catheter; The oxygen of coming in from oxygen intake is split into oxygen catheter Nei bis-road, the one oxygen Liu He bis-road oxygen stream in twice oxygen stream i.e. one oxygen catheter by oxygen regulating valve, the port of export of one oxygen catheter is communicated with the oxygen guiding gutter of cyclone mixer, the oxygen guiding gutter that one oxygen in one oxygen catheter flows through on cyclone mixer enters fuel nozzle, one oxygen stream mixes at fuel nozzle inward eddy together with fuel-air mixed flow, forms the oxidizing combustible mixed flow mixed; The two road oxygen catheter ports of export are provided with oxygen gas distributing chamber, oxygen gas distributing chamber coaxially offers multiple oxygen jet installing port for installing two road oxygen jets around fuel nozzle, two oxygen Liu Cong bis-road, oxygen catheter Nei bis-road, road oxygen catheters are through the ejection at a high speed of two road oxygen jets, and two road oxygen streams of ejection at a high speed form rotational field in kiln.
Further, cyclone mixer of the present invention is conic tube structure, the outer wall of the nozzle of cyclone mixer is provided with one or more oxygen guiding gutter of a circle, oxygen spray mouth together with annular concentric with flow in fuel together with defining at fuel nozzle Inner wall place after cyclone mixer is socketed with fuel nozzle.
Further, the oxygen guiding gutter in the present invention is uniformly distributed, and all oxygen guiding gutters are relative to all axially setting in a certain angle of flow in fuel conveyance conduit, and as tilted, 10 ° of angles are arranged.
Further, fuel nozzle described in the present invention is venturi coaxial injector structure.Further, the fuel nozzle ports of described fuel nozzle can be rectangle spout, flat-shaped spout or circular spout, can by the adjustment of shape realization to the particular/special requirement of combustion flame of the fuel nozzle ports on refuelling nozzle.
Further, being provided with in the spout end of fuel nozzle in the present invention with the vertically disposed width of flow in fuel carrier pipe is the adverse current baffle plate of s.Described adverse current baffle plate can be designed as multi-form, rectangle, semicircle, fan-shaped, triangle.
Further, the connection between cyclone mixer described in the present invention and flow in fuel carrier pipe and fuel nozzle is the mode of removably connecting.
Further, described in the present invention, multiple oxygen jet installing port is equal with the distance of fuel nozzle, and multiple oxygen jet installing port is symmetrical arranged up and down, distance between oxygen jet installing port above fuel nozzle is equal, and the distance between the oxygen jet installing port below fuel nozzle is equal.
Further, the quantity of the installing port of oxygen jet described in the present invention is 8, and 8 oxygen jet installing ports are uniformly distributed the periphery being arranged on fuel nozzle ringwise.Oxygen jet installing port number does not limit 8, can select according to different kiln situation.
Advantageous Effects of the present invention is:
1, cyclone mixer
Cyclone mixer adopts the mode that removably connects, be sleeved in fuel nozzle, its outer wall is provided with many oxygen guiding gutters in 10 ° angles axial with burner, between oxygen guiding gutter above together and fuel nozzle outer wall, forms a ring shape oxygen spray mouth.The cyclone mixer size be sleeved in fuel nozzle can be changed by selecting the cyclone mixer of different size.One oxygen stream enters fuel nozzle from the oxygen guiding gutter of one oxygen catheter through cyclone mixer and mixes with fuel-air mixed flow eddy flow, forms oxidizing combustible mixed flow.By can realize the adjustment to one oxygen spray mouth position in fuel nozzle to the design of cyclone mixer outside diameter d 1, d, thus realize the adjustment to flame front combustion stability and flame jet length; Wherein d is the external diameter that cyclone mixer enters one oxygen end, and d1 is the external diameter that cyclone mixer goes out one oxygen end, and D is the internal diameter of cyclone mixer; By the design of cyclone mixer internal diameter D, the thermal power that burner exports can be changed, adapt to different kiln demand.
2, combustor fuel nozzle
Fuel mix flows to the fuel nozzle into burner.Fuel nozzle is designed to venturi coaxial injector structure.It not only can strengthen mixing of one oxygen stream and fuel-air mixed flow further, the static pressure that the oxidizing combustible mixed flow be mixed to form provides can be converted into dynamic pressure simultaneously, and can also change flow behavior and the strength characteristic of oxidizing combustible mixed flow.The Venturi effect of fuel nozzle ensure that the mixing of the fluid that two strands of pressure, flow velocity are different.Change one oxygen spray mouth position by the specification changing cyclone mixer, realize changing nozzle strength characteristic and regulate needs.Fuel nozzle ports can be designed as difformity, realizes the demand for control to different flame profile.
3, oxygen regulating valve
Enter high pressure (0.1MPa) oxygen of burner, after carrying out Flow-rate adjustment by oxygen regulating valve, the oxygen guiding gutter on cyclone mixer sprays.The oxygen jet of friction speed enters combustor fuel nozzle and will produce different fuel mix stream flow velocitys, thus realizes the regulable control to burner combustion flame length.
4, adverse current baffle plate
In the spout end of fuel nozzle, be provided with the adverse current baffle plate that the width vertical with flow in fuel carrier pipe is s, baffle plate adopts dismountable mode to install.When oxidizing combustible mixed flow flows through baffle plate, flow to, flow velocity changes because of baffle plate, fuel jet intercepts in formation countercurrent zone, spout front end because of baffle plate.Fuel return will be rolled in fuel nozzle ports front end in countercurrent zone, make high-temperature furnace gas carry out preheating to fuel, thus shorten flame Zhi Ran district, improve combustion stability.The adverse current baffle plate of difformity, size achieves the adjustment to combustion stability and stagnant combustion interval.
5, two road oxygen spray designs
The high pressure oxygen (0.1MPa) of joining after oxygen equipment adjustment (pressure, flow) through outside enters burner.Oxygen catheter Nei bis-road, the one oxygen Liu He bis-road oxygen stream in twice oxygen stream i.e. one oxygen catheter is split into by oxygen regulating valve.Two road oxygen flow to into two road oxygen gas distributing chamber, to the oxygen jet air feed around fuel nozzle.Wherein oxygen jet distance fuel nozzle center x, and be uniformly distributed about fuel nozzle central shaft Central Symmetry.Two road oxygen streams of ejection form rotational field in kiln at a high speed.Rotational field is inhaled and is rolled up a large amount of furnace gases in combustion flame, adds flame volume, has fallen at the end flame temperature, and the furnace gas hot fluid circulation of strong row exchanges and facilitates in-furnace temperature evenly simultaneously, thus decreases the generation of NOx; Unburnt fuel entrainments into combustion flame by rotational field simultaneously, promotes the second-time burning of fuel, improves the efficiency of combustion of fuel.Oxygen jet installing port can select the oxygen jet of different size to install, and can realize the adjustment to flame temperature region to the selection of each oxygen jet installing port installation nozzle specification.
6, this burner can promote the burning of air-fuel, can increase torch width capping and amass.Can be used for air honeycomb regenerator kiln.
Accompanying drawing explanation
Fig. 1 structural representation of the present invention;
The structural representation of Fig. 2 cyclone mixer;
The structure and working principle schematic diagram of Fig. 3 fuel nozzle;
The signal of Fig. 4 fuel nozzle ports effect and version schematic diagram;
The installation effect schematic diagram of Fig. 5 adverse current baffle plate;
Several version schematic diagrames of Fig. 6 adverse current plate washer;
Oxygen jet installation site, Fig. 7 bis-road schematic diagram;
Fig. 8 is design sketch of the present invention.
In figure: 1, fuel-air mixed flow entrance, 2, oxygen intake, 3, oxygen regulating valve, 4, cyclone mixer, 5, oxygen jet, 6, fuel nozzle, 7, adverse current baffle plate, 8, two road oxygen catheters, 9, one oxygen catheter, 10, flow in fuel carrier pipe, 11, fuel nozzle ports, 12, oxygen guiding gutter, 13, oxygen gas distributing chamber, 14, oxygen jet installing port.
The object of the invention realization, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference to accompanying drawing 1, a kind of steady flame low nitrogen solid fuel oxygen-enriched burner, comprise fuel-air mixed flow entrance 1, oxygen intake 2, oxygen regulating valve 3, cyclone mixer 4, oxygen jet 5, fuel nozzle 6, adverse current baffle plate 7, two road oxygen catheters 8, one oxygen catheter 9, flow in fuel carrier pipe 10, fuel nozzle ports 11 and oxygen guiding gutter 12.
Fuel-air mixed flow entrance 1 is communicated with flow in fuel carrier pipe 10, and described flow in fuel carrier pipe 10 other end is connected with cyclone mixer 4.Cyclone mixer 4 is provided with oxygen guiding gutter 12, is sleeved in fuel nozzle 6, and forms oxygen spray mouth together with annular with fuel nozzle 6 inwall.Described oxygen intake 2 is arranged on two road oxygen catheters 8, is set with one oxygen catheter 9 in two road oxygen catheters 8, and the porch of one oxygen catheter 9 is provided with oxygen regulating valve 3.Described fuel-supply pipe 10 is sleeved in one oxygen catheter 9.The port of export of one oxygen catheter 9 is connected with the oxygen guiding gutter 12 on cyclone mixer 4.Two road oxygen catheter 8 other ends are provided with oxygen gas distributing chamber 13 and connect, and oxygen gas distributing chamber 13 other end is provided with the multiple oxygen jet installing ports 14 offered around fuel nozzle 6.Oxygen jet 5 is installed on oxygen jet installing port 14.
Fuel-air mixed flow enters fuel-supply pipe 10 from fuel-air mixed flow entrance 1, enters in fuel nozzle 6 through cyclone mixer 4.
The oxygen of coming in from oxygen intake 2 flows through oxygen regulating valve 3 and is split into twice oxygen stream: oxygen catheter 8 Nei bis-road, the one oxygen Liu He bis-road oxygen stream in one oxygen catheter 9.One oxygen stream to enter in fuel nozzle 6 through oxygen guiding gutter 12 from one oxygen catheter 9 and is mixed into oxidizing combustible mixed flow with fuel-air mixed flow eddy flow.Two road oxygen flow through two road oxygen catheters 8 through oxygen gas distributing chamber 13 by oxygen jet 5 ejection at a high speed.The two road oxygen streams sprayed at a high speed and oxidizing combustible mixed flow form rotational field in kiln.
With reference to Fig. 2, cyclone mixer 4 is conic tube structure, the outer wall of the nozzle of cyclone mixer 4 is provided with one or more oxygen guiding gutter 12 of a circle.Oxygen guiding gutter 12 in the present invention is uniformly distributed, all oxygen guiding gutters 12 relative to flow in fuel conveyance conduit 10 all tilt certain angle (as 10 °) arrange.Cyclone mixer 4 size (cyclone mixer outside diameter d 1, d, cyclone mixer internal diameter D) can be changed by selecting the cyclone mixer of different size.The adjustment to one oxygen spray mouth position in fuel nozzle can be realized by the adjustment of d1, d, thus realize the adjustment to flame front combustion stability and flame jet length; By the adjustment of internal diameter D, the thermal power that burner exports can be changed, adapt to different kiln demand.
In the present invention, described fuel nozzle 6 is venturi coaxial injector structure, as shown in Figure 3.
For fuel nozzle 6, the adjustment of shape realization to the particular/special requirement of combustion flame of the fuel nozzle ports 11 on refuelling nozzle 6 can be passed through, as shown in Figure 4.Give the fuel nozzle ports schematic diagram of two kinds of forms in the diagram, in Fig. 4 (a), fuel nozzle ports 11 for cross section be pancake spout, in Fig. 4 (b), fuel nozzle ports 11 is circular spout.
With reference to Fig. 5, be the installation effect schematic diagram of adverse current baffle plate, the adverse current baffle plate 7 that the width arranged along fuel-air mixed flow vertical direction is s is installed in fuel nozzle ports 11 end of fuel nozzle 6.As shown in Figure 6, give the adverse current baffle plate of several form, described adverse current baffle plate selects difformity according to different kiln, and the shape of adverse current baffle plate can be rectangle, semicircle, fan-shaped or triangle.
With reference to Fig. 7, the quantity of described oxygen jet installing port is 8, and 8 oxygen jet installing ports are evenly arranged on the periphery of fuel nozzle 6 ringwise, and oxygen jet installing port 14 and fuel nozzle 6 are about burner centre axle Central Symmetry.Can by changing the air demand that different oxygen jets 5 regulates burner torch zones of different at oxygen jet installing port 14.Such as, for glass furnace, need the regional temperature near metal level high, then can by will the oxygen jet installing port above glass metal being installed oxygen jet or install the large oxygen jet of bore, close or install the little oxygen jet of bore in symmetric position, realize near the oxygen supply of metal level upper area many, thus above control metal level, temperature, higher than the temperature near region, arch top, meet the demand of glass melting to zones of different temperature.
In the present invention, the central axes of described two road oxygen catheters, one oxygen catheter and flow in fuel carrier pipe.
Fuel-air mixed flow enters flow in fuel carrier pipe 10 through cyclone mixer 4 from fuel-air mixed flow entrance 1, enters fuel nozzle 6.One oxygen stream enters fuel nozzle from the oxygen guiding gutter of one oxygen catheter through cyclone mixer and mixes with fuel-air mixed flow eddy flow, form oxidizing combustible mixed flow, when oxidizing combustible mixed flow flows through baffle plate, flow to, flow velocity changes because of baffle plate, fuel jet intercepts in formation countercurrent zone, spout front end because of baffle plate.Fuel return will be rolled in fuel nozzle ports front end in countercurrent zone, make high-temperature furnace gas carry out preheating to fuel, thus shorten flame Zhi Ran district, improve combustion stability, as shown in Figure 5.
The high pressure oxygen (0.1MPa) of joining after oxygen equipment adjustment (pressure, flow) through outside enters burner from oxygen intake 2.Oxygen catheter Nei bis-road, the one oxygen Liu He bis-road oxygen stream in twice oxygen stream i.e. one oxygen catheter is split into by oxygen regulating valve.
The oxygen guiding gutter 12 that one oxygen flows through on cyclone mixer 4 enters fuel nozzle 6.Due to the angle that oxygen guiding gutter and flow in fuel conveyance conduit are 10 °, one oxygen stream is at a high speed forming eddy flow through oxygen guiding gutter.The one oxygen stream becoming eddy flow mixes at fuel nozzle 6 inward eddy together with fuel-air mixed flow, forms oxidizing combustible mixed flow.
The effect of one oxygen is:
1, flame stabilization burning is maintained;
2, the jet length of oxidizing combustible mixed flow is adjusted;
3, fuel combustion speed is accelerated.
Two road oxygen flow to into two road oxygen gas distributing chamber, to the oxygen jet air feed around fuel nozzle.Wherein the distance at oxygen jet distance fuel nozzle center is x, and is uniformly distributed about fuel nozzle central shaft Central Symmetry.Two road oxygen streams of ejection form rotational field in kiln at a high speed.Rotational field is inhaled and is rolled up a large amount of furnace gases in combustion flame, adds flame volume, has fallen at the end flame temperature, and the furnace gas hot fluid circulation of strong row exchanges and facilitates in-furnace temperature evenly simultaneously, thus decreases the generation of NOx; Unburnt fuel entrainments into combustion flame by rotational field simultaneously, promotes the second-time burning of fuel, improves the efficiency of combustion of fuel.
Oxygen jet 5 determines rotational field area size apart from fuel nozzle distance x, distance x, can change x by the two road oxygen gas distributing chamber changing different size.
The effect of two road oxygen jets:
1, accelerate solid fuel ignition speed, promote fuel second-time burning;
2, accelerate thermal cycle in kiln, reduce flame temperature, keep in-furnace temperature even, reduce the generation of NOx;
3, cool, protect burner.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing description of the present invention to do, or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a steady flame low nitrogen solid fuel oxygen-enriched burner, is characterized in that, comprises fuel-air mixed flow entrance, oxygen intake, oxygen regulating valve, cyclone mixer, oxygen jet, fuel nozzle, two road oxygen catheters, one oxygen catheter and flow in fuel carrier pipe; Fuel-air mixed flow entrance is communicated with flow in fuel carrier pipe, and the other end of described flow in fuel carrier pipe is connected with cyclone mixer, and cyclone mixer is connected with fuel nozzle; Fuel-air mixed flow is entered by fuel-air mixed flow entrance, enters cyclone mixer, then enter fuel nozzle through flow in fuel carrier pipe; Described oxygen intake is arranged on two road oxygen catheters, and be provided with one oxygen catheter in two road oxygen catheters, the porch of one oxygen catheter is provided with oxygen regulating valve; Described flow in fuel carrier pipe is sleeved in one oxygen catheter; The oxygen of coming in from oxygen intake is split into oxygen catheter Nei bis-road, the one oxygen Liu He bis-road oxygen stream in twice oxygen stream i.e. one oxygen catheter by oxygen regulating valve, the port of export of one oxygen catheter is communicated with the oxygen guiding gutter of cyclone mixer, the oxygen guiding gutter that one oxygen in one oxygen catheter flows through on cyclone mixer enters fuel nozzle, one oxygen stream mixes at fuel nozzle inward eddy together with fuel-air mixed flow, forms the oxidizing combustible mixed flow mixed; The two road oxygen catheter ports of export are provided with oxygen gas distributing chamber, oxygen gas distributing chamber coaxially offers multiple oxygen jet installing port for installing two road oxygen jets around fuel nozzle, two oxygen Liu Cong bis-road, oxygen catheter Nei bis-road, road oxygen catheters are through the ejection at a high speed of two road oxygen jets, and two road oxygen streams of ejection at a high speed form rotational field in kiln.
2. steady flame according to claim 1 low nitrogen solid fuel oxygen-enriched burner, it is characterized in that, described cyclone mixer is conic tube structure, the outer wall of the nozzle of cyclone mixer is provided with one or more oxygen guiding gutter of a circle, oxygen spray mouth together with annular concentric with flow in fuel together with defining at fuel nozzle Inner wall place after cyclone mixer is socketed with fuel nozzle.
3. steady flame according to claim 2 low nitrogen solid fuel oxygen-enriched burner, it is characterized in that, oxygen guiding gutter is uniformly distributed, and all oxygen guiding gutters are relative to all axially setting in a certain angle of flow in fuel conveyance conduit.
4. steady flame according to claim 1 low nitrogen solid fuel oxygen-enriched burner, is characterized in that, described fuel nozzle is venturi coaxial injector structure.
5. steady flame according to claim 4 low nitrogen solid fuel oxygen-enriched burner, is characterized in that, the fuel nozzle ports of described fuel nozzle is rectangle spout, flat-shaped spout or circular spout.
6. steady flame according to claim 1 low nitrogen solid fuel oxygen-enriched burner, is characterized in that, being provided with in the spout end of fuel nozzle with the vertically disposed width of flow in fuel carrier pipe is the adverse current baffle plate of s.
7. steady flame according to claim 6 low nitrogen solid fuel oxygen-enriched burner, is characterized in that, described adverse current baffle plate is rectangle, semicircle, fan-shaped or triangle etc.
8. steady flame according to any one of claim 1 to 7 low nitrogen solid fuel oxygen-enriched burner, is characterized in that, the connection between described cyclone mixer and flow in fuel carrier pipe and fuel nozzle is the mode of removably connecting.
9. steady flame according to claim 8 low nitrogen solid fuel oxygen-enriched burner, it is characterized in that, described multiple oxygen jet installing port is equal with the distance of fuel nozzle, and multiple oxygen jet installing port is symmetrical arranged up and down, distance between oxygen jet installing port above fuel nozzle is equal, and the distance between the oxygen jet installing port below fuel nozzle is equal.
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| CN201510606989.5A CN105135430B (en) | 2015-09-22 | 2015-09-22 | A kind of low nitrogen solid fuel oxygen-enriched burner of steady flame |
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Cited By (6)
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| CN105805747A (en) * | 2016-04-29 | 2016-07-27 | 王付生 | U-shaped gas jet channels and burner with same |
| CN110849138A (en) * | 2019-12-18 | 2020-02-28 | 王志宏 | Cement kiln denitration device, cement kiln and cement kiln denitration process |
| CN112745012A (en) * | 2019-10-29 | 2021-05-04 | 霍尼韦尔国际公司 | Fuel gas and oxygen burner |
| CN113464975A (en) * | 2021-07-19 | 2021-10-01 | 中国石油天然气股份有限公司 | Ignition gun |
| CN115014088A (en) * | 2022-06-27 | 2022-09-06 | 上海宝冶冶金工程有限公司 | A spray device and sleeve kiln |
| CN117968065A (en) * | 2023-11-17 | 2024-05-03 | 克雷登热能设备(浙江)有限公司 | Ultralow-nitrogen combustion system and method adapting to fuel composition change |
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