CN103849434A - Combined type coal water slurry nozzle provided with ignition device - Google Patents
Combined type coal water slurry nozzle provided with ignition device Download PDFInfo
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- CN103849434A CN103849434A CN201410090799.8A CN201410090799A CN103849434A CN 103849434 A CN103849434 A CN 103849434A CN 201410090799 A CN201410090799 A CN 201410090799A CN 103849434 A CN103849434 A CN 103849434A
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Abstract
The invention relates to a combined type coal water slurry nozzle provided with an ignition device. The combined type coal water slurry nozzle provided with the ignition device comprises an outer sprayer, a middle sprayer, an inner sprayer and a center pipe which are coaxially arranged, wherein an ignition cable is arranged on the outer wall of the center pipe, a hydrocyclone which can form rotary jet is arranged at the front end of the center pipe, an axial through hole is formed in the hydrocyclone, certain shrinkage is formed at the front end of the center pipe relative to the front end of the through hole of the hydrocyclone, part of or all the circumferential edge of the hydrocyclone is contacted with the inner cavity wall of the front end of the inner sprayer; certain retraction is formed in the front end face of the hydrocyclone relative to the end face reference surface of the inner sprayer, so that a premixing cavity B is formed. The combined type coal water slurry nozzle provided with the ignition device has the advantages that functions of an ignition nozzle and a technological nozzle in a gasifier are combined into one, so that the ignition nozzle and the technological nozzle can not be switched again and again in the whole gasification process, and complex operation in the gasification process is simplified; meanwhile, current required for ignition is small, so that the combustible effect on coal water slurry is improved, the ignition success rate is high, and the produced flame is stable.
Description
Technical field
The present invention relates to a kind of coal slurry gasifier burner, specifically a kind of combined water coal slurry burner with portfire.
Background technology
Because China's oil starvation, weak breath, coal resources are abundanter comparatively speaking, no matter as the energy or industrial chemicals, coal is still occupied an leading position in longer following period of time from now on.Coal is converted into industrial chemicals and first coal will be gasified, coal gasification plays a part very important in coal deep processing and gasification operation.The pressurized gasification of coal improving efficiency of energy utilization, environment protection, realize operation automation, save floor space, there is absolute predominance the aspect such as production that maximizes.At present, traditional coal slurry gasifier is to be all provided with igniter burner, process burner (coal water slurry burner).Igniter burner, in order to promote furnace temperature, after furnace temperature rises to temperature, is substituted into process burner.
As described in Figure 1, be the cross-sectional view of the current process burner generally adopting, the design considerations of this burner has: (1) structure formation is three concentric sleeve pipes, is outer shower nozzle 1 from inside to outside, is used as outer oxygen transfer lime; Middle shower nozzle 2, is used as the transport pipe of coal water slurry; Interior shower nozzle 3, is used as the transfer lime of central oxygen.The outlet of the central oxygen transfer lime of burner is designed to reducing form, object is that central oxygen is accelerated, the end face of this burner has certain retraction amount with respect to the end standard face of burner simultaneously, forms like this pre-mixing chamber (i.e. the first premix chamber 4) of a coal water slurry and center delivering oxygen; The export pipeline of coal water slurry is also designed to reducing form, makes the coal water slurry that enters pre-mixing chamber have certain speed; In pre-mixing chamber, utilize the oxygen that carry at center coal water slurry is diluted and just accelerate, change the rheological property of coal water slurry, object is to guarantee that coal water slurry is at the atomizing effect leaving after burner; The retraction amount of outer oxygen transfer lime is larger, to reach good gasification result in vapourizing furnace.(2) no matter runner passage, be the circulation passage area of coal water slurry or outer oxygen, all should meet the traffic requirement of medium separately.In the situation that supply pressure allows.Strive reaching good mixing and atomizing effect.Particularly have certain restriction for the requirement of center delivering oxygen, be generally 5% to 25% of total oxygen demand, all the other are external oxygen operational throughput.(3) flow velocity, the oxygen that carry at center is generally 150m/s to 180m/s in the speed in exit, coal water slurry exit velocity is generally 2m/s to 4m/s, and pre-mixing chamber exit velocity is generally 12m/s to 20m/s, and the exit velocity of outer oxygen is generally 160m/s to 200m/s.(4) cooling unit, generally arranges cooling water coil 5 in the periphery of described outer shower nozzle 1.
In actual application, igniter burner uses in the different stages from process burner (being existing coal water slurry burner) simultaneously, the deficiency existing is: because igniter burner and process burner are two burners independently, and the two is applied in the different stages, igniter burner is for the igniting heating at initial stage, process burner is applied in igniter burner furnace temperature is raised to after certain temperature, and the replacement of the two need to realize by puopulsion unit.Be specially: first, with puopulsion unit, igniter burner is sent into workspace, complete after combustion preheater, puopulsion unit is sent igniter burner back to original position; Then change and send into process burner to workspace.Because there is use, replacing to two burners, so the heating process complexity that makes to light a fire operates complicatedly, indirectly extend the heating furnace temperature time used.In addition,, easily there is fault in the complicated structure of puopulsion unit, so can cause difficulty to production technique.
Summary of the invention
For the problem of above-mentioned existence, the object of the present invention is to provide a kind of combined water coal slurry burner of adopting tube-in-tube structure of the function that integrates process burner and igniter burner, this burner is applied in after coal water slurry gasification process, complete separately igniting and technique heating, make whole technique simple, operation is succinct, do not need puopulsion unit to complete numerous and diverse replacing action, thereby reduce action step, simplified the structure, improved the continuous reliability of technique.
For achieving the above object, the present invention is by the following technical solutions:
Solution of the present invention discloses a kind of combined water coal slurry burner with portfire, comprise the outer shower nozzle of oxygen circulation, be arranged on the middle shower nozzle of the confession coal water slurry circulation in described outer shower nozzle, be arranged on the interior shower nozzle of the oxygen circulation in described middle shower nozzle, and be arranged on the pipe core that the employing metal material for fuel gas circulation in described interior shower nozzle is manufactured, described pipe core is divided into forward and backward two sections, the front and rear sections of pipe core is fixed with one by the insulation of ceramic insulation ring set, and described outer shower nozzle, middle shower nozzle, interior shower nozzle and pipe core coaxially arrange, described outer shower nozzle exit end inner chamber is taper reducing chamber, tapered and the inner chamber of the exit end profile of described middle shower nozzle is taper reducing chamber, the exit end profile of described interior shower nozzle is tapered, between outer shower nozzle exit end conical inboard wall and middle shower nozzle exit end conical outer wall, form taper reducing ring cavity, between the exit end conical outer wall of middle shower nozzle exit end conical inboard wall and interior shower nozzle, form taper reducing ring cavity, the bevel angle θ of the taper reducing ring cavity forming between outer shower nozzle exit end conical inboard wall and middle shower nozzle exit end conical outer wall
2be greater than the bevel angle θ that forms taper reducing ring cavity between the exit end conical outer wall of shower nozzle exit end conical inboard wall and interior shower nozzle
1, on the outer wall of described pipe core, be provided with ignition cable, the discharge end parts of described ignition cable is packed in by metal staple on the outer wall of described pipe core leading portion part, leading portion end at described pipe core is provided with the swirler that can form rotating jet, between described pipe core and the contact surface of described swirler, be provided with ceramic insulating layer, described swirler is provided with through hole axial and that be communicated with described pipe core, the front end of the through hole of the relatively described swirler of the front end of described pipe core has certain contracting amount, the some or all of circumferential edge of described swirler outer wall contacts with the front end internal chamber wall of described interior shower nozzle, the front end face of described swirler has certain retraction amount with respect to the end standard face of described interior shower nozzle, thereby forms fuel gas and a premix chamber B from the oxygen of interior shower nozzle.
As to further improvement of the present invention, the point of crossing of the coal water slurry jet being ejected by the taper reducing ring cavity forming between described middle shower nozzle exit end and interior shower nozzle exit end, axially at a distance of the spacing H of described interior shower nozzle front end face
1be in 150mm to 200mm.It should be noted that H
1value be difficult for excessively, otherwise be not easy a combusting coal water slurry.H
1value can not be too small, otherwise just make the strong of flame weaken, be unfavorable for heating process.Guarantee H
1the advantage being in the proper range of 150mm to 200mm is: can guarantee that the coal water slurry jet ejecting is easily lighted on the one hand, can elongate on the other hand flame, make the flame envelope of flame away from burner head, increase the work-ing life of burner.The point of crossing of the oxygen jet being ejected by the taper reducing ring cavity forming between described outer shower nozzle exit end and middle shower nozzle exit end, the axial spacing H at a distance of described interior shower nozzle front end face
2be in 130mm to 1500mm, H
2value be also difficult for excessively, reason is to above-mentioned substantially similar, so repeat no more.
As to further improvement of the present invention, on the end face of described pipe core leading portion, establish axially extended collar flange, the axial height H of described collar flange
3be not more than the spacing L between the outward flange of relatively described pipe core leading portion end, edge, outer ring of described collar flange
1, the front end of the through hole on described swirler is back taper enlarging, the front end of described pipe core is arranged on the back edge place of this back taper enlarging.
As to further improvement of the present invention, the front end face of described interior shower nozzle has certain retraction amount with respect to the end standard face of burner, thereby forms coal water slurry and a premix chamber A from the oxygen of described interior shower nozzle.
As to further improvement of the present invention, the inner chamber of the exit end of described interior shower nozzle is taper reducing chamber, and correspondingly, the front end of described swirler is cone-shaped end, on this cone-shaped end, be provided with spinning disk, the part circumferential edge of described spinning disk contacts with the front end internal chamber wall of described interior shower nozzle.
As to further improvement of the present invention, described spinning disk is α angle with respect to the inclination angle of the front end face of described swirler.
As to further improvement of the present invention, described spinning disk is 45 ° to 75 ° with respect to the inclination alpha of the front end face of described swirler.
As to further improvement of the present invention, be provided with cooling water coil in the periphery of described outer shower nozzle.
As to further improvement of the present invention, at least in described middle shower nozzle front inner wall and on described interior shower nozzle front end outer wall, Gu Shi alloy or high-abrasive material are installed with.
The invention has the beneficial effects as follows: by add portfire on the basis of existing process burner, the function that has not only realized igniter burner and coal water slurry process burner is two-in-one, making no longer needs to convert back and forth igniter burner and coal water slurry process burner in whole gasification, has simplified numerous and diverse property of gasification operation; Adopt pipe core to pass into fuel gas, interior shower nozzle passes into oxygen, and first makes fuel gas and oxygen mix, is then lighted, after fuel gas and oxygen mix, its combustibility is improved, so can realize low current igniting, ignition success rate is improved, the oxygen penetrating through interior shower nozzle is through swirler effect, axial velocity is lowered, shorten axial range, made a large amount of fuel gas and oxygen concentrate on B position, premix chamber, formed stationary flame (some combusting coal water slurry is used); Because θ
2be greater than θ
1so accelerated the Oxygen Flow penetrating by the taper reducing ring cavity forming between outer shower nozzle exit end conical inboard wall and middle shower nozzle exit end conical outer wall, can be in the axial direction of burner, with between the exit end conical outer wall of middle shower nozzle exit end conical inboard wall and interior shower nozzle, form coal water slurry jet that taper reducing ring cavity penetrates and intersect and mix, increase the combustibility of coal water slurry, be difficult for burned characteristic thereby improve coal water slurry.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of existing process burner of water-coal-slurry gasification furnace;
Fig. 2 is the cross-sectional view of combined water coal slurry burner involved in the present invention;
The local structure enlarged diagram of Fig. 3 combined water coal slurry burner involved in the present invention end;
Fig. 4 is the main TV structure schematic diagram of swirler;
Fig. 5 is the structural representation of the left side of swirler;
In figure: 1 outer shower nozzle, shower nozzle in 2,3 interior shower nozzles, 4 premix chamber A, 5 cooling water coils, 6 pipe cores, 61 metal staples, 62 ignition cables, 63 collar flanges, 7 swirlers, 71 spinning disks, 8 premix chamber B, 9 ceramic insulating layers, 10 ceramic insulation ring sets.
Embodiment
For ease of understanding technology contents of the present invention, below in conjunction with accompanying drawing, its technical scheme is further described.
As shown in Figure 2 and Figure 3, a kind of combined water coal slurry burner with portfire, comprise the outer shower nozzle 1 of oxygen circulation, be arranged on the middle shower nozzle 2 of the confession coal water slurry circulation in described outer shower nozzle 1, be arranged on the interior shower nozzle 3 of the oxygen circulation in described middle shower nozzle 2, and be arranged on the pipe core 6 that the employing metal material for fuel gas circulation in described interior shower nozzle 3 is manufactured.In order to guarantee work-ing life, at least in described middle shower nozzle 2 front inner wall and on described interior shower nozzle 3 front end outer walls, Gu Shi alloy or high-abrasive material are installed with, to strengthen the erosion of water resistant coal slurry.
Described pipe core 6 is divided into forward and backward two sections, and the front and rear sections of pipe core 6 is fixed with one by 10 insulation of ceramic insulation ring set, and described outer shower nozzle 1, middle shower nozzle 2, interior shower nozzle 3 and pipe core 6 coaxially arrange.Described outer shower nozzle 1 exit end inner chamber is taper reducing chamber; Tapered and the inner chamber of the exit end profile of described middle shower nozzle 2 is taper reducing chamber; The exit end profile of described interior shower nozzle 3 is tapered; Between outer shower nozzle 1 exit end conical inboard wall and middle shower nozzle 2 exit end conical outer walls, form taper reducing ring cavity, between middle shower nozzle 2 exit end conical inboard walls and the exit end conical outer wall of interior shower nozzle, form taper reducing ring cavity; The bevel angle θ of the taper reducing ring cavity forming between outer shower nozzle 1 exit end conical inboard wall and middle shower nozzle 2 exit end conical outer walls
2be greater than the bevel angle θ that forms taper reducing ring cavity between shower nozzle 2 exit end conical inboard walls and the exit end conical outer wall of interior shower nozzle 3
1.
The outlet of described outer shower nozzle 1, described middle shower nozzle 2 and described interior shower nozzle 3 is reducing form.The inner chamber in the exit of described outer shower nozzle 1, described middle shower nozzle 2 and described interior shower nozzle 3 can be all conical cavity, so that three's outlet is the form of convergent mouth, but now three's reducing velocity of variation is also non-uniform.
As shown in Figure 3, the point of crossing of the coal water slurry jet being ejected by the taper reducing ring cavity forming between described middle shower nozzle 2 exit end and interior shower nozzle 3 exit end, is axially in 150mm to 200mm at a distance of the spacing H1 of described interior shower nozzle 3 front end faces.The value that it should be noted that H1 is difficult for excessive, otherwise is not easy a combusting coal water slurry.The value of H1 can not be too small, otherwise just make the strong of flame weaken, and is unfavorable for heating process.Guarantee that the advantage that H1 is in the proper range of 150mm to 200mm is: can guarantee that the coal water slurry jet ejecting is easily lighted on the one hand, can elongate on the other hand flame, make the flame envelope of flame away from burner head, increase the work-ing life of burner.The point of crossing of the oxygen jet being ejected by the taper reducing ring cavity forming between described outer shower nozzle 1 exit end and middle shower nozzle 2 exit end, axially be in 130mm to 1500mm at a distance of the spacing H2 of described interior shower nozzle 3 front end faces, the value of H2 is also difficult for excessive, reason is to above-mentioned substantially similar, so repeat no more.
As shown in Figure 2 and Figure 3, be provided with cooling water coil 5 in the periphery of described outer shower nozzle 1.The front end face of described interior shower nozzle 3 has certain retraction amount with respect to the end standard face of burner, thereby forms coal water slurry and a premix chamber A4 from the oxygen of described interior shower nozzle 3.
On the outer wall of described pipe core 6, be provided with ignition cable 62, the discharge end parts of described ignition cable 62 is packed in by metal staple 61 on the outer wall of described pipe core 6 leading portion parts, ignition cable 62 is switched on, and only makes described pipe core 6 leading portions form high pressure (carrying high voltage electric).
On the end face of described pipe core 6 leading portions, establish axially extended collar flange 63, the axial height H3 of described collar flange 63 is not more than the spacing L1 between the outward flange of relatively described pipe core 6 leading portion ends, edge, outer ring of described collar flange 63, generally getting the value that H3 gets is 1mm to 1.5mm, and the value of L1 is 2mm to 3mm.
Be provided with the swirler 7 that can form rotating jet in the leading portion end of described pipe core 6.Between described pipe core 6 and the contact surface of described swirler 7, be provided with ceramic insulating layer 9, described swirler 7 is provided with through hole (axis of the axis of this through hole and described pipe core 6 is consistent) axial and that be communicated with described pipe core 6, the front port of the through hole of the relatively described swirler 7 of the front end of described pipe core 6 has certain contracting amount, preferably the front port of the through hole of described swirler 7 is made as to back taper enlarging, and the front end that makes described pipe core 6 is arranged on the back edge place of this back taper enlarging, make the front end face of described collar flange 63 extend into the length of 1mm left and right in the cone chamber, rear end of this back taper enlarging.Fuel gas, by this through hole on this pipe core 6 and swirler 7, is penetrated by the front end face of swirler 7.Ignition cable 62 electric discharges make pipe core 6 leading portions form high laminate, high-tension current passes to after described collar flange 63, can find two corresponding sags and crests electric discharges at the front end face of described collar flange 63, form the continuous arcing of arcuation, improve the ignition quality of burner, easily realize stable ignition, adapt to the application under severe some fire environment.
The some or all of circumferential edge of described swirler 7 contacts with the front end internal chamber wall of described interior shower nozzle 3; The front end face of described swirler 7 has certain retraction amount with respect to the end standard face of described interior shower nozzle 3, thereby forms fuel gas and a premix chamber B8 from the oxygen of interior shower nozzle.
As shown in Figures 2 to 5, in the time that the inner chamber in the exit of described interior shower nozzle 3 is conical cavity, correspondingly, the front end that makes described swirler 7 is cone-shaped end, and on this cone-shaped end, establish spinning disk 71, the part circumferential edge of described spinning disk 71 contacts with the chamber wall of the front end conical cavity of described interior shower nozzle 3.Described spinning disk 71 is α angle with respect to the inclination angle of the front end face (front end face of swirler 7 is perpendicular to the axis of swirler 7) of described swirler 7, for guaranteeing that oxygen can form rational rotating jet, described spinning disk 71 is 45 ° to 75 ° with respect to the inclination alpha of the front end face of described swirler 7.
In the time starting to light a fire, only pass into fuel gas and oxygen and do not pass into coal water slurry.By described pipe core 6, the through hole on described swirler 7 is penetrated by the front end of swirler 7 fuel gas.The oxygen that passes into through described interior shower nozzle 3 (below be called oxygen one time) is done to penetrate in order to the form of rotating jet through swirler 7, and mixes with fuel gas at the front end place of swirler 7.Because the front end face of described swirler 7 has certain retraction amount (having a premix chamber B8) with respect to the end standard face of described interior shower nozzle 3, fuel gas and an oxygen can be penetrated by the front end of described interior shower nozzle 3 after this place carries out premix.
Electric current is delivered to described metal staple 61 through the electric discharge termination of described ignition cable 62, and be delivered to described pipe core 6 through described metal staple 61, and finally form electric discharge at the front end place of described pipe core 6, and the mixed gas of fuel gas and an oxygen is lighted.Because an oxygen of ejection has swirling flow characteristic, thereby increased the homogeneity that oxygen mixes with fuel gas, made the flammable obviously raising of mixed gas mixture, one side can improve ignition success rate; On the other hand, the requirement of the current value of being emitted by described ignition cable 62 is not needed too large, can realize low current and light.
An oxygen is after the cyclonic action of swirler 7, and axial velocity is lowered, and makes a large amount of fuel gas and an oxygen gas mixture concentrate on B position, premix chamber, put by thermoelectricity cable 62 a little to be lighted and forms stationary flame (some combusting coal water slurry with).The outlet of described interior shower nozzle 3 is reducing form again, so can carry out certain axial acceleration to fuel gas and an oxygen gas mixture, the flame of lighting formation after the two is mixed has long axial range, thereby guarantees further some combusting coal water slurry.
The Oxygen Flow (being called secondary oxygen below) being penetrated by the ring cavity forming between outer shower nozzle 1 inwall and middle shower nozzle 2 outer walls, after corresponding taper reducing ring cavity accelerates, penetrate with higher speed, it penetrates direction to the axially incline of burner, and to be certain angle with the axis of burner (be θ
2half).
The coal water slurry jet being penetrated by the ring cavity forming between middle shower nozzle 2 inwalls and interior shower nozzle 3 outer walls, after corresponding taper reducing ring cavity accelerates, penetrate with higher speed, it penetrates the axially incline of direction to burner, and to be certain angle with the axis of burner (be θ
1half).Because θ
1be less than θ
2so in axial forward end a distance of burner, coal water slurry stream and secondary oxygen can form to intersect and mix.The combustibility that is mixed with the coal water slurry of oxygen is significantly improved, and the coal water slurry that has overcome current existence is lighted difficult problem.Secondary oxygen and coal water slurry stream forms and intersects that to mix be that the outside of the conical surface that formed by coal water slurry jet enters inwards, to contain an oxygen being penetrated by inner nozzle 3 in this conical surface inside that simultaneously coal water slurry jet forms, so the degree of oxidation of coal water slurry is further improved, flammable enhancing.As front statement, because after the mixed gas of oxygen and fuel gas lighted, can penetrate certain axial length, so finally can light by the abundant coal water slurry of oxygen, realize technique igniting.
Because the through hole front end on described swirler 7 is a back taper enlarging, so can have certain suck-back effect to lighting the flue gas of rear formation, the flue gas that suck-back returns can carry out certain preheating to the gas mixture of oxygen and fuel gas, so the further combustioncharacteristics of the gas mixture of oxygen of raising and fuel gas, increases the reliability of burner igniting and the stability of burning.
Above technical characterictic has formed preferred forms of the present invention, and it has stronger adaptability and best implementation result, can increase and decrease as required non-essential technical characterictic, meets the different practical situation in actual use.But protection scope of the present invention is not limited to above-mentioned concrete scheme, its protection domain is finally subject to the restriction of claims of the present invention.In the situation that not deviating from design philosophy of the present invention, for a person skilled in the art, can make to the present invention conversion or the replacement of multiple known property, it all should fall within the scope of protection of the present invention.
Claims (10)
1. the combined water coal slurry burner with portfire, comprise the outer shower nozzle of oxygen circulation, be arranged on the middle shower nozzle of the confession coal water slurry circulation in described outer shower nozzle, and be arranged on the interior shower nozzle of oxygen in described middle shower nozzle circulation, it is characterized in that: also comprise the pipe core that is arranged on the employing metal material manufacture for fuel gas circulation in described interior shower nozzle, described pipe core is divided into forward and backward two sections, the front and rear sections of pipe core is fixed with one by the insulation of ceramic insulation ring set, and described outer shower nozzle, middle shower nozzle, interior shower nozzle and pipe core coaxially arrange, described outer shower nozzle exit end inner chamber is taper reducing chamber, tapered and the inner chamber of the exit end profile of described middle shower nozzle is taper reducing chamber, the exit end profile of described interior shower nozzle is tapered, between outer shower nozzle exit end conical inboard wall and middle shower nozzle exit end conical outer wall, form taper reducing ring cavity, between the exit end conical outer wall of middle shower nozzle exit end conical inboard wall and interior shower nozzle, form taper reducing ring cavity, the bevel angle θ of the taper reducing ring cavity forming between outer shower nozzle exit end conical inboard wall and middle shower nozzle exit end conical outer wall
2be greater than the bevel angle θ that forms taper reducing ring cavity between the exit end conical outer wall of shower nozzle exit end conical inboard wall and interior shower nozzle
1, on the outer wall of described pipe core, be provided with ignition cable, the discharge end parts of described ignition cable is packed in by metal staple on the outer wall of described pipe core leading portion part, leading portion end at described pipe core is provided with the swirler that can form rotating jet, between described pipe core and the contact surface of described swirler, be provided with ceramic insulating layer, described swirler is provided with through hole axial and that be communicated with described pipe core, the front end of the through hole of the relatively described swirler of the front end of described pipe core has certain contracting amount, the some or all of circumferential edge of described swirler outer wall contacts with the front end internal chamber wall of described interior shower nozzle, the front end face of described swirler has certain retraction amount with respect to the end standard face of described interior shower nozzle, thereby forms fuel gas and a premix chamber B from the oxygen of interior shower nozzle.
2. the combined water coal slurry burner with portfire according to claim 1, it is characterized in that: the point of crossing of the coal water slurry jet being ejected by the taper reducing ring cavity forming between described middle shower nozzle exit end and interior shower nozzle exit end, the axial spacing H at a distance of described interior shower nozzle front end face
1be in 150mm to 200mm; The point of crossing of the oxygen jet being ejected by the taper reducing ring cavity forming between described outer shower nozzle exit end and middle shower nozzle exit end, the axial spacing H at a distance of described interior shower nozzle front end face
2be in 130mm to 1500mm.
3. the combined water coal slurry burner with portfire according to claim 1 and 2, is characterized in that: on the end face of described pipe core leading portion, establish axially extended collar flange, the axial height H of described collar flange
3be not more than the spacing L between the outward flange of relatively described pipe core leading portion end, edge, outer ring of described collar flange
1, the front end of the through hole on described swirler is back taper enlarging, the front end of described pipe core is arranged on the back edge place of this back taper enlarging.
4. the combined water coal slurry burner with portfire according to claim 3, it is characterized in that: the front end face of described interior shower nozzle has certain retraction amount with respect to the end standard face of burner, thereby form coal water slurry and a premix chamber A from the oxygen of described interior shower nozzle.
5. the combined water coal slurry burner with portfire according to claim 4, it is characterized in that: the inner chamber of the exit end of described interior shower nozzle is taper reducing chamber, correspondingly, the front end of described swirler is cone-shaped end, on this cone-shaped end, be provided with spinning disk, the part circumferential edge of described spinning disk contacts with the front end internal chamber wall of described interior shower nozzle.
6. the combined water coal slurry burner with portfire according to claim 5, is characterized in that: described spinning disk is α angle with respect to the inclination angle of the front end face of described swirler.
7. the combined water coal slurry burner with portfire according to claim 6, is characterized in that: described spinning disk is 45 ° to 75 ° with respect to the inclination alpha of the front end face of described swirler.
8. according to the combined water coal slurry burner with portfire described in any one in claim 1 or 2 or 4 to 7, it is characterized in that: the periphery at described outer shower nozzle is provided with cooling water coil.
9. the combined water coal slurry burner with portfire according to claim 8, is characterized in that: on the end face of described pipe core leading portion, establish axially extended collar flange, the axial height H of described collar flange
3be not more than the spacing L between the outward flange of relatively described pipe core leading portion end, edge, outer ring of described collar flange
1, the front end of the through hole on described swirler is back taper enlarging, the front end of described pipe core is arranged on the back edge place of this back taper enlarging.
10. the combined water coal slurry burner with portfire according to claim 1 and 2, is characterized in that: at least in described middle shower nozzle front inner wall and on described interior shower nozzle front end outer wall, be installed with Gu Shi alloy or high-abrasive material.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105670701A (en) * | 2016-01-27 | 2016-06-15 | 西安航天源动力工程有限公司 | Ignition method of integrated CWS (coal water slurry) process burner |
| CN109181774A (en) * | 2018-08-22 | 2019-01-11 | 清华大学山西清洁能源研究院 | The coal-water slurry gasification burner of integrated ignition function |
| CN113154393A (en) * | 2021-04-07 | 2021-07-23 | 北京航化节能环保技术有限公司 | Integrated gun for start-up burner, use method and industrial furnace |
| CN116064173A (en) * | 2023-02-16 | 2023-05-05 | 山东兖矿国拓科技工程股份有限公司 | Water-coal-slurry process burner |
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| US5505045A (en) * | 1992-11-09 | 1996-04-09 | Fuel Systems Textron, Inc. | Fuel injector assembly with first and second fuel injectors and inner, outer, and intermediate air discharge chambers |
| CN2797888Y (en) * | 2005-02-05 | 2006-07-19 | 洛阳市科本机械设备有限公司 | Low pressure plane flame burner |
| CN101403496A (en) * | 2007-08-29 | 2009-04-08 | 西门子公司 | Combined pulverized coal burner comprising an integrated pilot burner |
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| CN105670701A (en) * | 2016-01-27 | 2016-06-15 | 西安航天源动力工程有限公司 | Ignition method of integrated CWS (coal water slurry) process burner |
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Application publication date: 20140611 |