CN103834444B - Combined ignition nozzle of dry coal powder fluidized bed gasifier - Google Patents
Combined ignition nozzle of dry coal powder fluidized bed gasifier Download PDFInfo
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- CN103834444B CN103834444B CN201410091166.9A CN201410091166A CN103834444B CN 103834444 B CN103834444 B CN 103834444B CN 201410091166 A CN201410091166 A CN 201410091166A CN 103834444 B CN103834444 B CN 103834444B
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Abstract
The invention discloses a combined ignition nozzle of a dry coal powder fluidized bed gasifier. The combined ignition nozzle comprises an inner nozzle, an outer nozzle and an outer layer cooling jacket, wherein the inner nozzle comprises an igniter and a fuel gas channel; the front end of the outer nozzle is a sealed end; the outer nozzle comprises an oxygen channel with a divergent opening structure, a spindly axial inclined oxygen blower, an ignition oxygen output opening, and a cooling water distributor; the axial inclined oxygen blower is arranged at the front end face of the nozzle in a manner of a dual-layer ring; the outer layer cooling jacket comprises two layers of annular channels, and single spiral flow channels with throats at the front ends of the annular channels. Ignition can be easily finished, and is stable and reliable, and the generated flame has high-strength combustion value, the heating rate of the gasifier is accelerated, and the service life is long.
Description
Technical field
The present invention relates to a kind of igniter burner of pulverized coal gasification furnace, specifically dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner.
Background technology
Along with the property in short supply of global petroleum resources is on the rise, the practical status of coal resource in chemical industry becomes more and more important.The consequent is, more and more extensive to the gasification application of coal in chemical industry, has the trend replacing petrochemical complex gradually.And in coal chemical industry, vapourizing furnace is the emphasis in coal chemical industry, in vapourizing furnace, igniter burner and process burner are the integral parts of vapourizing furnace.Igniter burner wherein role is at the beginning of vapourizing furnace comes into operation, the coal-fired medium of kindling Wen Yudian.But occur in igniter burner use procedure following in problem: ignition difficulties, often needs repeatedly lead fire can be successful; Igniter burner is easily burned, and work-ing life is short, increases the labour cost of use cost and replacing, reduces the working efficiency of gasification.The structure that the termination of watercooling jacket used is baffle plate type, water coolant is when flowing through position, termination, and cannot enter into each position of burner, cause inhomogeneous cooling even, local overheating phenomenon is serious.Simultaneously because water coolant flow velocity is low, easily obtain enough heats and be vaporized, producing the life-span of a large amount of steam to burner causes remarkable infringement.
Summary of the invention
For above-mentioned Problems existing, the invention provides a kind of ignition operation simple, convenient, ignition success rate is high; Water coolant evaporating capacity is low, the dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner of burner long service life.
The technical scheme that the present invention is taked for achieving the above object is as follows:
The invention discloses a kind of dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner, comprise burner and watercooling jacket, described burner is divided into interior burner and outer burner.Described watercooling jacket is divided into outer watercooling jacket and internal layer watercooling jacket.Interior burner, outer burner and outer watercooling jacket is set to by internal layer outer layers successively coaxial sleeve from the axle center of burner.Described internal layer watercooling jacket is arranged in the wall body of described outer burner, and is nested with outside described interior burner.
Described interior burner comprises the lighter for ignition and fuel gas passageway that axially arrange.The spark electrode of described lighter for ignition is located at described fuel gas passageway front-end port place.The front end of described fuel gas passageway is flared end.The front end of described outer burner is sealing end, and described outer burner radially ecto-entad comprise outer wall, the first middle layer, the second middle layer, the 3rd middle layer and inwall successively.
Described internal layer watercooling jacket comprises internal layer water coolant water outlet annular channel, internal layer water coolant water inlet annular channel and internal layer water coolant Inlet and outlet water interconnecting part.
It is the secondary oxygen induction trunk of ring-type between described outer wall and the first middle layer.The front end place of described secondary oxygen induction trunk is flaring mouth structure, be laid with on the top of this flaring mouth structure and multiplely radially-inwardly roll tiltedly and axially extend to the secondary oxygen outlet of the front end face of described outer burner, and the center of circle of the front port of described multiple secondary oxygen outlets is positioned on the circle concentric with the front end face of burner.
Being described internal layer water coolant water outlet annular channel between described first middle layer and the second middle layer, is an oxygen induction trunk of ring-type between described second middle layer and the 3rd middle layer.The front end of a described oxygen induction trunk is axially followed successively by flaring mouth channel architecture and constant chamber channel architecture, and the cavity dimension of constant chamber passage is consistent with flaring mouth channel architecture cavity dimension foremost.Axial distribution openings is established in the front end of the constant chamber channel architecture of a described oxygen induction trunk.Radially-inwardly roll tiltedly in the uniform setting in the front end of described distribution openings and axially extend to an oxygen outlet in described outer front end of burner face.In upper part of described distribution openings with axial vertical surface for the plane of symmetry, be provided with two radially-inwardly to tilt, and axially extended igniting oxygen outlet, the oxygen feeder of described igniting oxygen outlet is located on the sidewall of described distribution openings cavity, the spray oxygen port of described igniting oxygen outlet extends to the side-walls of described fuel gas passageway front end, and the spark electrode of corresponding described lighter for ignition.
Described 3rd is described internal layer water coolant water inlet annular channel between middle layer and inwall.The front end of described internal layer water coolant water inlet annular channel and described internal layer water coolant water outlet annular channel is by internal layer water coolant Inlet and outlet water interconnecting part.The communicating passage of described internal layer water coolant Inlet and outlet water interconnecting part is the annular jet runner of cellular type or slit.
Described outer watercooling jacket is located at around the outer wall of described outer burner, the front end of described outer watercooling jacket is enclosuring structure, the die cavity of described outer watercooling jacket is cooled the double-layer circular channel architecture that water interlayer is divided into, described double-layer circular passage is respectively outer annular channel and internal layer annular channel, and the front end exit of described internal layer annular channel is reducing chamber.The front end of described water coolant interlayer is that radial direction expands body, the axial direction part position that corresponding radial direction is expanded residing for body, establish the connected chamber being communicated with described outer annular channel and internal layer annular channel in the front end of described outer watercooling jacket, the equivalent section that the equivalent section of described connected chamber amasss the front port being not more than described internal layer ring-type Channel front end reducing chamber place is amassed.It is basically identical that the radial direction of water coolant interlayer expands the chamber wall thickness arranging the burning head at this place of body, thus the uniformity of temperature profile of each several part, greatly reduce the generation of stress crack, improve the use properties of burner.
As to further improvement of the present invention, described secondary oxygen outlet is intilted slightness hole, and the angle between the axis of this slightness hole and the axis of igniter burner is α angle, and the span at described α angle is 30 ° to 60 °.
As to further improvement of the present invention, multiple secondary oxygen that the described front port center of circle is positioned on the circle concentric with the front end face of burner export, along the radial direction of burner, be divided into multichannel, the front port center of circle of each road secondary oxygen outlet is positioned on the different circles concentric from the front end face of burner; In same road, the α angle of secondary oxygen outlet is identical, and the α angle in not going the same way is different and radial direction along burner becomes large certainly outside to inside successively.Like this can decentralized oxygen, avoid oxygen to concentrate in a large number in the somewhere, front end of burner, cause localized hyperthermia, affect the life-span of burner.
As to further improvement of the present invention, the die cavity of described distribution openings is less than the die cavity of the constant chamber channel architecture part of an oxygen induction trunk, and the die cavity of an oxygen outlet and the die cavity of igniting oxygen outlet are all less than the die cavity of distribution openings; Described oxygen outlet is intilted slightness hole, and the angle between the axis of slightness hole and the axis of igniter burner is r angle, and the span at described r angle is 30 ° to 55 °; Described igniting oxygen outlet is also intilted slightness hole, and the angle between its axis and axis of igniter burner is Q angle; The span at described Q angle is 45 ° to 60 °, and the value at described Q angle is greater than the value at described r angle all the time.
Further preferably, described oxygen outlet die cavity is 1/2 times of distribution openings die cavity; The die cavity of described igniting oxygen outlet equals/is less than the die cavity of an oxygen outlet, export the Oxygen Flow that ejects in the point of crossing of igniter burner axis by a described oxygen, axially the spacing L of apart igniter burner front end face
1for 30mm to 180mm; The Oxygen Flow that ejects is exported in the point of crossing of igniter burner axis, axially at a distance of the spacing L of igniter burner front end face by described secondary oxygen
2for 45mm to 200mm; Described L
1value be greater than L
2value and L
1with L
2between difference be no more than 50mm.
As to further improvement of the present invention, the die cavity that described oxygen outlet, the outlet of secondary oxygen and igniting oxygen export is cylindric, and the die cavity of an oxygen outlet and the outlet of secondary oxygen is Φ 2mm to Φ 5mm, the die cavity of igniting oxygen outlet is Φ 0.5mm to Φ 2.5mm; At the front end face of igniter burner, the radial spacing of port center at a distance of the axle center of igniter burner of described oxygen outlet is D
1, the radial spacing of port center at a distance of the axle center of igniter burner of described secondary oxygen outlet is D
2, described D
1/ D
2scope be 2/3 to 2/5.
As to further improvement of the present invention, the angle e angle between the axis of described igniting oxygen outlet and the axis of spark electrode end is obtuse angle or right angle, and preferred described e angle is 90 °.
As to further improvement of the present invention, described internal layer water coolant Inlet and outlet water interconnecting part is the bispin runner channel of floor plan, two Luo Xinchu establish water coolant intake respectively, be communicated with internal layer water coolant annular channel of intaking, the end of two spirals establishes cooling-water flowing to export respectively, is communicated with internal layer water coolant water outlet annular channel.
As to further improvement of the present invention, the connected chamber arranged in the front end of described outer watercooling jacket is planar spiral, and Luo Xinchu establishes water coolant intake, and with internal layer ring-type channel connection, the end of spiral establishes cooling-water flowing to export, with outer ring-type channel connection; The cavity of described connected chamber adopts cellular type or slit type structure.When particularly adopting cellular type structure, when equivalent dams certain, effectively can increase the contact area of water coolant and flow path wall, improve the flow velocity of water coolant, strengthen heat transfer effect.
As to further improvement of the present invention, the axis along described interior burner is also provided with eyepiece passage, the axis of described eyepiece passage and the dead in line of described interior burner, and the front end of described eyepiece passage is arranged in the flared end of described fuel gas passageway front end.
Beneficial effect:
Burner involved in the present invention is telescoping structure, have simple to operate, igniting is convenient, reliable and stable, can high-intensity combustion be realized, accelerate the heat-up rate to vapourizing furnace, the setting of eyepiece passage, facilitate the inspection to flame combustion situation, the design of cooling water structure makes the heat radiation of burner each several part even, quick, and a large amount of vaporizations avoiding water coolant, on the impact in burner life-span, extend long service life.
Accompanying drawing explanation
Fig. 1 is right TV structure schematic diagram of the present invention;
Fig. 2 be in Fig. 1 A-A to structural representation;
Fig. 3 is the partial enlargement structural representation at I place in Fig. 2;
Fig. 4 is the local structure schematic diagram at II place in Fig. 2;
In figure: burner in 1,11 lighter for ignitions, 12 fuel gas passageway, 13 eyepiece passages, 2 outer burners, 20 internal layer water coolant Inlet and outlet water interconnecting parts, 21 outer walls, 22 first middle layers, 23 second middle layers, 24 the 3rd middle layers, 25 inwalls, 26 2 oxygen induction trunks, 261 2 oxygen outlets, 27 internal layer water coolant water outlet annular channels, 28 oxygen induction trunks, 280 distribution openings, 281 oxygen outlets, 282 igniting oxygen outlets, 29 internal layer water coolant water inlet annular channels, 3 outer watercooling jackets, 31 outer annular channels, 32 internal layer annular channels, 33 water coolant interlayers.
Embodiment
For ease of understanding technology contents of the present invention, below in conjunction with accompanying drawing, technical scheme of the present invention is described further.
As shown in Figures 1 to 3, a kind of dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner, comprises the outer watercooling jacket 3, outer burner 2 and the interior burner 1 that are coaxially nested with successively from outer layers towards inner layers; Also comprise the internal layer watercooling jacket be arranged in described outer burner 2 wall body.Described internal layer watercooling jacket comprises internal layer water coolant water outlet annular channel 27, internal layer water coolant water inlet annular channel 29 and internal layer water coolant Inlet and outlet water interconnecting part.
Described interior burner 1 comprises the lighter for ignition 11(and high-voltage ignition cable that axially arrange) and fuel gas passageway 12.Lighter for ignition 11 is made up of pyrometric probe and pyroceramic fixed block, high temperature resistant probe be energized time in point discharge; The front end of described fuel gas passageway 12 is flared end, is conducive to the premix of fuel gas and air like this, and reduces the flow velocity of fuel gas in exit, suitable igniting.The spark electrode of described lighter for ignition 11 is located at the port of the flared end of described fuel gas passageway 12 front end, it is emphasized that and the electric discharge termination of the spark electrode of described lighter for ignition 11 will be made to have certain spacing apart from the front end face of described igniter burner.Described fuel gas can be Sweet natural gas, gas, acetylene, coke-oven gas and other low-quality inflammable gass.
Axis along described interior burner 1 is also provided with eyepiece passage 13, the axis of described eyepiece passage and the dead in line of described interior burner, and the front end of described eyepiece passage 13 is arranged in the flared end of described fuel gas passageway 12 front end.Arranging of this eyepiece vision slit can be convenient for people to be observed flame at any time by this eyepiece passage 13, simultaneously because eyepiece passage 13 exit can form a negative pressuren zone when burning, make high-temperature flue gas backrush, form a stable high-temperature flue gas source by this, carry out the burning of further stationary flame.
The front end of described outer burner 2 is sealing end, and described outer burner 2 is from comprising middle layer 23, outer wall 21, first middle layer 22, second, the 3rd middle layer 24 and inwall 25 successively outside to inside; It is the secondary oxygen induction trunk 26 of ring-type between described outer wall 21 and the first middle layer 22, the front end place of described secondary oxygen induction trunk 26 is flaring mouth structure, be laid with on the top of this flaring mouth structure and radially-inwardly roll tiltedly and axially extend to the secondary oxygen outlet 261 of the front end face of described outer burner 2, described secondary oxygen induction trunk 26 is in communication with the outside by this secondary oxygen outlet 261.
Described secondary oxygen outlet 261 is intilted slightness hole, and the angle between the axis of this slightness hole and the axis of igniter burner is the α angle of span between 30 ° to 60 °, preferably 45 °.As shown in Figure 1, on the front end face of burner, the oxygen output end mouth of described secondary oxygen outlet 261 is uniformly distributed and center is connected to a circle, namely and the center of circle of the front port of described multiple secondary oxygen outlets 261 be positioned on the circle concentric with the front end face of burner.It should be noted that: multiple secondary oxygen that the described front port center of circle is positioned on the circle concentric with the front end face of burner export 261, along the radial direction of burner, be divided into multichannel, the front port center of circle of each road secondary oxygen outlet 261 is positioned at (the secondary oxygen be positioned on same annulus exports 261 for same road) on the different circles concentric from the front end face of burner.In same road, the α angle of secondary oxygen outlet 261 is identical, and the α angle in not going the same way is different and radial direction along burner becomes large certainly outside to inside successively.α angle between adjacent two-way preferably with 10 ° or 15 ° for variable gradient.Like this, the secondary oxygen being exported 261 ejections by the secondary oxygen of not going the same way can disperse to intersect at the different positions of the front end of burner (axis), forms the level shape structure of taper, avoids oxygen and concentrate in a large number in certain of front end of burner, produce localized hyperthermia after being ignited, burner is burnt in advance.
The die cavity of described secondary oxygen outlet 261 is much smaller than the die cavity of the flaring mouth structure end at described secondary oxygen induction trunk 16 front end place, make oxygen like this in the process of circulation, be subject to the impact of flaring contracting flow passage structure suddenly, it is made greatly to increase in the spouting velocity of the port of secondary oxygen outlet 261, be conducive to the boundling of oxygen, increase the stability of flame and form hot flame, and avoiding the diffusion generating flame, accelerating the heating up process to vapourizing furnace.
Be internal layer water coolant water outlet annular channel 27 between described first middle layer 22 and the second middle layer 23, for internal layer water coolant is intake annular channel 29 between described 3rd middle layer 24 and inwall 25, described internal layer water coolant water inlet annular channel 29 is communicated with by internal layer water coolant Inlet and outlet water interconnecting part 20 with described internal layer water coolant water outlet annular channel 27; The communicating passage of described internal layer water coolant Inlet and outlet water interconnecting part 20 is the annular jet runner of cellular type or slit.Described internal layer water coolant Inlet and outlet water interconnecting part 20 is the bispin runner channel of floor plan, two Luo Xinchu establish water coolant intake respectively, be communicated with described internal layer water coolant annular channel 29 of intaking, the end of two spirals establishes cooling-water flowing to export respectively, is communicated with described internal layer water coolant water outlet annular channel 27.
It is an oxygen induction trunk 28 of ring-type between described second middle layer 23 and the 3rd middle layer 24, the front end of a described oxygen induction trunk 28 is axially followed successively by flaring mouth channel architecture and constant chamber channel architecture, and the cavity dimension of constant chamber passage is consistent with flaring mouth passage cavity dimension foremost.Distribution openings 280 described in axially extended distribution openings 280(is set also as an annular channel in the front end of the constant chamber channel architecture of a described oxygen induction trunk 28), the die cavity of described distribution openings 280 is much smaller than the die cavity of the constant chamber channel architecture part of an oxygen induction trunk 28.
Radially-inwardly roll tiltedly in the uniform setting in front end of described distribution openings 280 and axially extend to an oxygen outlet 281 in described outer front end of burner face, the die cavity of described oxygen outlet 281 is less than the die cavity of described distribution openings 280, and can get an oxygen outlet die cavity is 1/2 times of distribution openings die cavity; Described oxygen outlet 281 is intilted slightness hole, and the angle between the axis of this slightness hole and the axis of igniter burner is the r angle of span between 30 ° to 55 °.As shown in Figure 1, on the front end face of burner, the oxygen output end mouth of described oxygen outlet 281 is uniformly distributed and center is connected to a circle.In like manner, described oxygen outlet 281 also secondary oxygen outlet 261 equally, can be divided into multichannel described above.
In upper part of described distribution openings 280 with axial vertical surface for the plane of symmetry, be provided with two radially-inwardly to tilt, and axially extended igniting oxygen outlet 282, the oxygen feeder of described igniting oxygen outlet 282 is located on the sidewall of described distribution openings 280 cavity, the spray oxygen port of described igniting oxygen outlet 282 extends to the side-walls of described fuel gas passageway 12 front end, and the spark electrode of corresponding described lighter for ignition 11, namely the electric discharge position of spark electrode is just to the port of described igniting oxygen outlet 282, for increasing the success ratio of discharge igniting, the angle e angle that described igniting oxygen is exported between the axis of 282 and the axis of spark electrode end is 90 °.
The die cavity of described igniting oxygen outlet 282 is less than the die cavity of described distribution openings 280, described igniting oxygen outlet 282 is intilted slightness hole, angle between its axis and axis of igniter burner is the Q angle of span between 45 ° to 60 °, and the value at described Q angle is greater than the value at described r angle all the time.Preferred described r angle is 30 °, and described Q angle is 60 °.
Oxygen is successively by enlarging passage in a described oxygen induction trunk 28, and reducing passage, thus the spouting velocity increasing oxygen, be conducive to concentrating of oxygen, ensures the flame value temperature generating flame, accelerate the heating to vapourizing furnace.Oxygen is in this process of circulation, during cavity via distribution openings 280, because the oxygen feeder of an oxygen outlet 281 is located at the front end of distribution openings 280 cavity, the oxygen feeder of described igniting oxygen outlet 282 is located on the sidewall of distribution openings 280 cavity, and Q angle value is greater than described r angle value, so the oxygen of the overwhelming majority is mainly by described oxygen outlet 281 ejection at a high speed, and described igniting oxygen exports 282 leakage oxygen holes being equivalent to be arranged on the chamber wall of described distribution openings 280, the oxygen flowed out through described igniting oxygen outlet 282 is not only measured little, and flow velocity is slow, mix with fuel gas in the front end of fuel gas passageway 12 after igniting oxygen outlet 282 so be conducive to very much Oxygen Flow, reach desirable combustion of joining to compare, increase ignition success rate, again due to oxygen not cracked ends igniting oxygen outlet 282 at a slow speed flow out and mix with fuel gas, so be conducive to the stability maintaining the flammule generated.As preferably, the die cavity cross section of described igniting oxygen outlet 282 is equal to or less than the cross section die cavity of described oxygen outlet 281, thus guarantees that only having very little part of oxygen to export 282 by described igniting oxygen slowly flows out further.Choosing of the die cavity cross-sectional sizes of described igniting oxygen outlet 282 and Q angle is all that the combustioncharacteristics of based on fuel gas is determined, in addition, also will arrange the flow velocity of the oxygen passed in use procedure according to the combustioncharacteristics of the fuel gas passed into.
The end electric discharge of the pyrometric probe of described lighter for ignition 11, the oxygen that now two igniting oxygen outlet 282 provides mixes with fuel gas, ignited by probe, because described fuel gas passageway 12 front end is flaring structure, the axis of distribution openings 280 described in the axis runout of described igniting oxygen outlet 282 and footpath, chamber is less, so the flow velocity of fuel gas near probe and oxygen is all slower, very suitable igniting, and due to the continuous supply of oxygen, stable maintenance is a flammule, the accumulation at probe place along with fuel gas and oxygen, the flame of the flammule formed is long has certain increase, when this flammule reaches near the oxygen of oxygen outlet 281 ejection and the point of crossing of fuel gas, the mixture of oxygen and fuel gas can be lighted, form stationary flame.Namely oxygen plays and ignites and the effect of stationary flame; And then can ignite and export oxygen near the oxygen of 261 ejections and the point of crossing of fuel gas and fuel gas mixture by described secondary oxygen.Like this, oxygen is after an oxygen outlet 281 and secondary oxygen outlet 261, to intersect with fuel gas with different angles respectively and mix, and the cross facet formed is positioned at the different positions of front end of burner, namely the oxygen of secondary oxygen outlet 261 ejection and the cross facet of fuel gas are positioned at an oxygen and export before the cross facet of 281 oxygen sprayed and fuel gas, this kind of distributed architecture structure is by shearing, the stretching of air-flow and become very even after stirring, therefore make burning quick, abundant, accelerate the intensification of gasification body of heater.Secondary oxygen plays combustion-supporting effect, and flame oxygen generated by secondary oxygen is elongated further, and forms the thermal-flame with certain radial extensibility.
Described oxygen outlet 281 and described secondary oxygen outlet 261 are elongated hole, oxygen is not only increased jet velocity further, and has stopped the possibility of fuel gas return-flow after being sprayed by this thin long eyelet, avoid the generation of pure oxygen burning explosion hazard, increase the safe reliability of igniting.
Be optimized restriction further: as shown in Figure 4, export 281 Oxygen Flow ejected in the point of crossing of igniter burner axis, axially at a distance of the spacing L of igniter burner front end face by a described oxygen
1for 30mm to 180mm; 261 Oxygen Flow ejected are exported in the point of crossing of igniter burner axis, axially at a distance of the spacing L of igniter burner front end face by described secondary oxygen
2for 45mm to 200mm; Described L
1value be less than L
2value.To L
1and L
2value limit, reason is: prevent on the one hand Oxygen Flow from too disperseing because the axial distance that sprays is long, the flame of generation is made to lose fiery and forthright property, become too soft, guarantee again that the oxygen jet ejected can have simultaneously and sufficiently longly disperse space, increase the contact area of itself and fuel gas, ensure abundant, stable burning, make elementary pilot flame tapered and maintain certain length, making L on the other hand
1value is less than L
2value, elongates pilot flame further by secondary oxygen jet, makes the flame envelope of pilot flame away from igniter burner end head, increases the work-ing life of igniter burner
Be optimized restriction further again: the die cavity of described oxygen outlet 281, secondary oxygen outlet 261 and oxygen outlet 282 of lighting a fire is cylindric, and the die cavity of an oxygen outlet 281 and secondary oxygen outlet 261 is Φ 2mm to Φ 5mm, the die cavity of igniting oxygen outlet 282 is Φ 0.5mm to Φ 2.5mm; Preferably, the die cavity of igniting oxygen outlet 282 is less than the die cavity of oxygen outlet 281, the die cavity of an oxygen outlet 281 can with secondary oxygen export 261 die cavity consistent, also can specifically limit as required.As shown in Figure 1, at the front end face of igniter burner, the radial spacing of port center at a distance of the axle center of igniter burner of described oxygen outlet 281 is D
1, the radial spacing of port center at a distance of the axle center of igniter burner of described secondary oxygen outlet 261 is D
2, described D
1/ D
2scope be 2/3 to 2/5.
Described outer watercooling jacket 3 is located at around the outer wall of described outer burner 2, described outer watercooling jacket 3 is the double-layer circular channel architecture of front end closure, be respectively outer annular channel 31 and internal layer annular channel 32, described internal layer annular channel 32 is water coolant water entry, described outer annular channel 31 is water coolant water exit, and described outer annular channel 31 is separated by water coolant interlayer 33 with described internal layer annular channel 32.The front end exit of described internal layer annular channel 32 is reducing chamber, can improve the flow velocity of cooling-water flowing through herein time like this.
The front end of described water coolant interlayer 33 is that radial direction expands body, this radial direction is expanded body and is of a size of the 3-5 of the size of water coolant interlayer 33 rear end doubly, the axial direction part position that corresponding radial direction is expanded residing for body, establish the connected chamber being communicated with described outer annular channel 31 and internal layer annular channel 32 in the front end of described outer watercooling jacket 3, the equivalent section that the equivalent section of described connected chamber amasss the front port (osculum in reducing chamber) being not more than reducing chamber place, described internal layer annular channel 32 front end is amassed.Like this, after water coolant is entered by the front end exit reducing chamber acceleration of described internal layer annular channel 32, can appoint in connected chamber and so keep swiftly flowing state, thus shorten the single-point residence time of water coolant at burner termination (high-temperature zone) each single-point, and then decrease the evaporating capacity of water.The baffle plate type structure herein adopted relatively is at present (because current are at the inner skewness of cooling jacket head, localized hyperthermia is serious, and flow rate of water flow is low, for the vaporization of water provides condition, a large amount of steam can be produced, remarkably influenced is caused on the work-ing life of burner), adopt cellular type structure formation, water coolant can be delivered to equably each position of burner head, improve the homogeneity of water coolant distribution, strengthen radiating effect, extend the work-ing life of burner.Meanwhile, its flow velocity that water coolant can also be made to keep high, greatly reduces the vaporization of water coolant.
Described connected chamber is planar spiral, and Luo Xinchu establishes water coolant intake, is communicated with described internal layer annular channel 32, and the end of spiral establishes cooling-water flowing to export, and is communicated with described outer annular channel 31.Water coolant enters connected chamber by water coolant intake, and rotational flow flowed out from cooling-water flowing outlet after one week, and rotational flow by the laminar sub-layer of thinning turbulent flows, thus greatly improves convection transfer rate, strengthens the effect that cools to burner head.
The position, leading section of corresponding described water coolant interlayer 33 arranges radial direction and expands body, the footpath, chamber of connected chamber can be made to diminish, thus flow velocity keeps high velocity turbulent flow state when making on the one hand water coolant flow through this connected chamber by described internal layer annular channel 32, take away the heat burning head portion, the water coolant of flowing fast can reduce evaporation simultaneously, on the other hand, the wall thickness of burner head is made to be tending towards uniformity, the uniformity of temperature profile of each several part, there will not be uniform high temperature two to produce stress crack, thus improve the work-ing life of burning head.
Internal layer water coolant Inlet and outlet water interconnecting part 20 has double-cyclone passage, and dual rotary flowing equally by the laminar sub-layer of thinning turbulent flows, and greatly improves convection transfer rate, strengthens the effect that cools to burner head.Internal layer water coolant by internal layer water coolant Inlet and outlet water interconnecting part 20 evenly and at a high speed flow through burner head, evenly take away the heat of burner head, reduce temperature, increase the service life.
Facts have proved, this kind of cooling water passage structure only adopts simple eddy flow and the slit flow type of cooling than existing, and does not have the burner of specific design eddy flow runner, and more can improve work-ing life, work-ing life, prolongation was about more than 9 times.The object of double-deck cooling water flow conduits is adopted to be the homogeneity increasing burner each several part cooling degree, so when burner diameter is larger, also can set up one or more layers cooling water jacket structure at the skin of described outer watercooling jacket, namely adopt the cooling water flow conduits structure of the multilayer forms such as three layers or four layers.The cooling water jacket structure of this simple superposition should be subject to restriction of the present invention.
Burner of the present invention is by the design of oxygen therapy passage of burner and the structural adjustment of cooling water system, make oxygen sentence different angles with phase burner axis centre while making burner realize stable ignition to spray, two-layer gas mixture cross-level before and after being formed, add the mixing uniformity of oxygen and fuel gas, make burning more fast, fully, realize high-intensity combustion, improve the heat-up rate of vapourizing furnace, avoid the explosion hazard that fuel gas return-flow causes, in addition, the heat dispersion of burner is also improved.
Above-mentioned is only a kind of embodiment made technical scheme of the present invention, institute is come for those skilled in the art, the limited range of claims of the present invention all should be fallen in the technical scheme being only through simple replacement or equivalents without creative work.
Claims (10)
1. a dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner, comprises burner and watercooling jacket, it is characterized in that:
Described burner is divided into interior burner and outer burner; Described watercooling jacket is divided into outer watercooling jacket and internal layer watercooling jacket;
Interior burner, outer burner and outer watercooling jacket is set to by internal layer outer layers successively coaxial sleeve from the axle center of burner;
Described internal layer watercooling jacket is arranged in the wall body of described outer burner, and is nested with outside described interior burner;
Described interior burner comprises the lighter for ignition and fuel gas passageway that axially arrange;
The spark electrode of described lighter for ignition is located at described fuel gas passageway front-end port place;
The front end of described fuel gas passageway is flared end;
The front end of described outer burner is sealing end, and described outer burner radially ecto-entad comprise outer wall, the first middle layer, the second middle layer, the 3rd middle layer and inwall successively;
Described internal layer watercooling jacket comprises internal layer water coolant water outlet annular channel, internal layer water coolant water inlet annular channel and internal layer water coolant Inlet and outlet water interconnecting part;
It is the secondary oxygen induction trunk of ring-type between described outer wall and the first middle layer;
The front end place of described secondary oxygen induction trunk is flaring mouth structure, be laid with on the top of this flaring mouth structure and multiplely radially-inwardly roll tiltedly and axially extend to the secondary oxygen outlet of the front end face of described outer burner, and the center of circle of the front port of described multiple secondary oxygen outlets is positioned on the circle concentric with the front end face of burner;
It is described internal layer water coolant water outlet annular channel between described first middle layer and the second middle layer;
It is an oxygen induction trunk of ring-type between described second middle layer and the 3rd middle layer;
The front end of a described oxygen induction trunk is axially followed successively by flaring mouth channel architecture and constant chamber channel architecture, and the cavity dimension of constant chamber passage is consistent with flaring mouth channel architecture cavity dimension foremost;
Axial distribution openings is established in the front end of the constant chamber channel architecture of a described oxygen induction trunk;
Radially-inwardly roll tiltedly in the uniform setting in the front end of described distribution openings and axially extend to an oxygen outlet in described outer front end of burner face;
In upper part of described distribution openings with axial vertical surface for the plane of symmetry, be provided with two radially-inwardly to tilt, and axially extended igniting oxygen outlet, the oxygen feeder of described igniting oxygen outlet is located on the sidewall of described distribution openings cavity, the spray oxygen port of described igniting oxygen outlet extends to the side-walls of described fuel gas passageway front end, and the spark electrode of corresponding described lighter for ignition;
Described 3rd is described internal layer water coolant water inlet annular channel between middle layer and inwall;
Described internal layer water coolant water inlet annular channel is communicated with by internal layer water coolant Inlet and outlet water interconnecting part with the front end of described internal layer water coolant water outlet annular channel;
The communicating passage of described internal layer water coolant Inlet and outlet water interconnecting part is the annular jet runner of cellular type or slit;
Described outer watercooling jacket is located at around the outer wall of described outer burner, the front end of described outer watercooling jacket is enclosuring structure, the die cavity of described outer watercooling jacket is cooled the double-layer circular channel architecture that water interlayer is divided into, described double-layer circular passage is respectively outer annular channel and internal layer annular channel, and the front end exit of described internal layer annular channel is reducing chamber; The front end of described water coolant interlayer is that radial direction expands body, to the axial direction part position that should radial expand residing for body, establish the connected chamber being communicated with described outer annular channel and internal layer annular channel in the front end of described outer watercooling jacket, the equivalent section that the equivalent section of described connected chamber amasss the front port being not more than described internal layer ring-type Channel front end reducing chamber place is amassed.
2. dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner according to claim 1, it is characterized in that: described secondary oxygen outlet is intilted slightness hole, angle between the axis of this slightness hole and the axis of igniter burner is α angle, and the span at described α angle is 30 ° to 60 °.
3. dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner according to claim 2, it is characterized in that: multiple secondary oxygen that the center of circle of described front port is positioned on the circle concentric with the front end face of burner export, along the radial direction of burner, be divided into multichannel, the front port center of circle of each road secondary oxygen outlet is positioned on the different circles concentric from the front end face of burner; In same road, the α angle of secondary oxygen outlet is identical, and the α angle in not going the same way is different and radial direction along burner becomes large certainly outside to inside successively.
4. dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner according to claim 1, is characterized in that:
The die cavity of described distribution openings is less than the die cavity of the constant chamber channel architecture part of an oxygen induction trunk;
The die cavity of an oxygen outlet and the die cavity of igniting oxygen outlet are all less than the die cavity of distribution openings;
Described oxygen outlet is intilted slightness hole, and the angle between the axis of this slightness hole and the axis of igniter burner is r angle, and the span at described r angle is 30 ° to 55 °;
Described igniting oxygen outlet is intilted slightness hole, and the angle between the axis of this slightness hole and the axis of igniter burner is Q angle, and the span at described Q angle is 45 ° to 60 °; And
The value at described Q angle is greater than the value at described r angle all the time.
5. dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner according to claim 4, is characterized in that:
The die cavity of described oxygen outlet is the die cavity of the distribution openings of 1/2 times; The die cavity of described igniting oxygen outlet is not more than the die cavity of described oxygen outlet;
Export the Oxygen Flow that ejects in the point of crossing of igniter burner axis by a described oxygen, axially at a distance of the spacing L1 of igniter burner front end face be 30mm to 180mm;
Export the Oxygen Flow that ejects in the point of crossing of igniter burner axis by described secondary oxygen, axially at a distance of the spacing L2 of igniter burner front end face be 45mm to 200mm;
The value of described L1 is less than the value of L2 and the difference between L1 and L2 is no more than 50mm.
6. dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner according to claim 4, is characterized in that:
The die cavity that described oxygen outlet, the outlet of secondary oxygen and igniting oxygen export is cylindric, and the die cavity of an oxygen outlet and the outlet of secondary oxygen is Φ 2mm to Φ 5mm, and the die cavity of igniting oxygen outlet is Φ 0.5mm to Φ 2.5mm;
At the front end face of igniter burner, the radial spacing of port center at a distance of the axle center of igniter burner of described oxygen outlet is D1, and the radial spacing of port center at a distance of the axle center of igniter burner of described secondary oxygen outlet is D2, described D1
/the scope of D2 is 2/3 to 2/5.
7. dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner according to claim 1, is characterized in that: the angle between the axis of described igniting oxygen outlet and the axis of spark electrode end is e angle, and described e angle is obtuse angle or 90 ° of angles.
8. dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner according to claim 1, it is characterized in that: described internal layer water coolant Inlet and outlet water interconnecting part is the bispin runner channel of floor plan, two Luo Xinchu establish water coolant intake respectively, be communicated with internal layer water coolant annular channel of intaking, the end of two spirals establishes cooling-water flowing to export respectively, is communicated with internal layer water coolant water outlet annular channel.
9. dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner according to claim 1, it is characterized in that: the connected chamber arranged in the front end of described outer watercooling jacket is planar spiral, Luo Xinchu establishes water coolant intake, with internal layer ring-type channel connection, the end of spiral establishes cooling-water flowing to export, with outer ring-type channel connection; The cavity of described connected chamber adopts cellular type or slit type structure.
10. dry pulverized coal fluidized-bed gasification furnace built-up type igniter burner according to any one of claim 1 to 9, it is characterized in that: the axis along described interior burner is also provided with eyepiece passage, the axis of described eyepiece passage and the dead in line of described interior burner, the front end of described eyepiece passage is arranged in the flared end of described fuel gas passageway front end.
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| CN201410091166.9A CN103834444B (en) | 2014-03-13 | 2014-03-13 | Combined ignition nozzle of dry coal powder fluidized bed gasifier |
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| CN201410091166.9A CN103834444B (en) | 2014-03-13 | 2014-03-13 | Combined ignition nozzle of dry coal powder fluidized bed gasifier |
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| CN103834444B true CN103834444B (en) | 2015-07-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104531220A (en) * | 2014-12-09 | 2015-04-22 | 贵州开阳化工有限公司 | Heating deformation-prevention start-up burner |
| CN105240850B (en) * | 2015-10-27 | 2018-08-14 | 殷黎丽 | Turn round cupola furnace water cooling exterior mixing pure oxygen fuel burner nozzle |
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| US20090061372A1 (en) * | 2007-08-29 | 2009-03-05 | Tino Just | Combination pulverized fuel burner with integrated pilot burner |
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