CN103305284B - High-strength gasifier process burner - Google Patents
High-strength gasifier process burner Download PDFInfo
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- CN103305284B CN103305284B CN201310208760.7A CN201310208760A CN103305284B CN 103305284 B CN103305284 B CN 103305284B CN 201310208760 A CN201310208760 A CN 201310208760A CN 103305284 B CN103305284 B CN 103305284B
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Abstract
The invention relates to a burner and in particular relates to a high-strength gasifier process burner. The technical problems that the speed of injecting central oxygen is low and the efficiency of premixing coal slurry and oxygen is low caused by the factor that an outlet of a central oxygen tube of the burner is in a straight tube mode, a cooling effect is bad by employing a jacket type cooling tube, and the like in the prior art are mainly solved. The high-strength gasifier process burner comprises an outer pipe, wherein one end of the outer pipe is connected with a nozzle mechanism through a flange; a cooling water coil pipe is wound outside the nozzle mechanism; the nozzle mechanism comprises a primary oxygen nozzle; a coal slurry nozzle is arranged in the primary oxygen nozzle; a secondary oxygen nozzle is arranged in the coal slurry nozzle; a certain retraction amount is formed from the end face of the secondary oxygen nozzle to the reference surface of the end face of the burner; the ends of the primary oxygen nozzle, the coal slurry nozzle and the secondary oxygen nozzle are in a necking mode; the primary oxygen nozzle, the coal slurry nozzle and the secondary oxygen nozzle are communicated with a primary oxygen inlet, a coal slurry inlet and a secondary oxygen inlet respectively through a pipeline mechanism.
Description
Technical field
The present invention relates to a kind of burner, especially relate to a kind of high strength vapourizing furnace process burner.
Background technology
Process burner structure formation one is removed as, concentric three runners, and two runners, have outer oxygen pipe, coal slurry pipe, central oxygen pipe and water-cooled tube.Chinese patent discloses a kind of coal water slurry burner (publication number: CN103013574 A), and it comprises fuel gas pipe, has fuel gas passage in fuel gas pipe, in fuel gas passage, is provided with ignition mechanism; The first oxygen hose, the first oxygen hose is set in the outside of fuel gas pipe to limit the first oxygen channel of annular between the first oxygen hose and fuel gas pipe; Water-coal slurry pipe, water-coal slurry pipe is set in the outside of the first oxygen hose to limit annular coal water slurry passage between water-coal slurry pipe and the first oxygen hose; The second oxygen hose, the second oxygen hose is set in the outside of water-coal slurry pipe to limit the second oxygen channel of annular between the second oxygen hose and water-coal slurry pipe; And cooling tube, cooling tube is set in the outside of the second oxygen hose to limit annular cooling channel between cooling tube and the second oxygen hose; The lower end of cooling tube is connected with the lower end of the second oxygen hose with under sealing cooling channel; Between cooling tube and the second oxygen hose, be provided with isolated tube, cooling channel is isolated into annular water entry and annular water exit by isolated tube, and water exit is communicated with the lower end of water entry; Water entry is positioned at the inner side of water exit and the outside wall surface of the second oxygen hose is provided with multiple radiating pieces for dispelling the heat; Also comprise closure member, the lower end of cooling tube is connected with closure member respectively with the lower end of the second oxygen hose; The lower surface of coal water slurry passage extends beyond lower surface first predetermined distance of fuel gas passage and the first oxygen channel downwards; The lower surface of the first oxygen channel extends beyond lower surface second predetermined distance of fuel gas passage downwards, and the lower surface of the second oxygen channel extends beyond lower surface the 3rd predetermined distance of coal water slurry passage downwards, second and the 3rd predetermined distance be less than the first predetermined distance.But the outlet of the central oxygen pipe of this burner is straight pipe type, and while spraying central oxygen like this, speed is slower, the premix efficiency of coal slurry and oxygen is lower, and adopts the cooling tube of jacketed type to make cooling performance poor.
Summary of the invention
The present invention is to provide a kind of high strength vapourizing furnace process burner, it is mainly that the outlet of the central oxygen pipe of the existing burner of solution prior art is straight pipe type, while spraying central oxygen like this, speed is slower, the premix efficiency of coal slurry and oxygen is lower, and adopts the cooling tube of jacketed type to make poor etc. the technical problem of cooling performance.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of high strength vapourizing furnace process burner of the present invention, comprise outer tube, described outer tube one end is connected with nozzle mechanism by flange, nozzle mechanism is outer has cooling water coil around volume, nozzle mechanism includes and once sprays oxygen mouth, once spray and in oxygen mouth, be provided with coal slurry nozzle, once spray between oxygen mouth and coal slurry nozzle and be provided with the gap that can allow oxygen pass through, in coal slurry nozzle, be provided with secondary spray oxygen mouth, between coal slurry nozzle and secondary spray oxygen mouth, be provided with the gap that can allow coal slurry pass through, in secondary spray oxygen mouth, be provided with the passage that can allow oxygen pass through, secondary spray oxygen mouth tip-to-face distance burner end standard face has certain retraction amount, once spray oxygen mouth, coal slurry nozzle, the end of secondary spray oxygen mouth is all reducing type, once spray oxygen mouth, coal slurry nozzle, secondary spray oxygen mouth is communicated with oxygen entrance one time by pipeline mechanism respectively, coal slurry entrance, secondary oxygen entrance, the spray oxygen amount of secondary spray oxygen mouth is the 15-30% that always sprays oxygen amount, all the other are the spray oxygen amount of once spraying oxygen mouth.
The object of cooling water coil is set, and is to change for protection burner is difficult for producing brilliant picture in high-temperature gas part.
The outlet of burner central oxygen pipe is designed to reducing form, and object is that central oxygen is accelerated, and its tip-to-face distance burner end standard face, has certain retraction amount simultaneously.Form the pre-confounding of a coal water slurry and central oxygen, the outlet pipe of coal water slurry is also designed to reducing form, the coal water slurry that makes to enter pre-confounding possesses certain pressure, in pre-confounding, improve rheological property, the effect of coal water slurry, ensure that coal water slurry is at the atomizing effect leaving after burner.No matter be central oxygen, or the circulation area of coal water slurry and outer oxygen, all need to meet the traffic requirement of medium separately, in the situation that supply pressure allows, strive the mixing and the atomizing effect that reach necessary.
But the ratio of central oxygen will have certain restricted condition, be generally 20%, 25% of total oxygen demand, all the other are all as outer oxygen.Central oxygen amount can not be too little, not so do not reach dilution and booster action to coal slurry.Central oxygen amount can not be too large, too conference increases too much the mixture velocity in pre-mixing district, cause the wear pattern in pipe core exit to worsen. and unstable, the continuous work-ing life of reducing burner, and this point affects the burner main factor in work-ing life just.On the other hand, when central oxygen amount increases, must make the axial velocity amount of burner outlet material increase, radial velocity component reduces, its result makes the flame profile of whole burner outlet become elongated, cannot mate with the inner profile of vapourizing furnace, cause the residence time of larger-diameter pulverized coal particle in vapourizing furnace to shorten, carbon content in slag increases, cause the reduction of gasification efficiency, and can make flame fling furnace bottom, damage cone brick, causing that chilling ring crosses cause thermal damage and reduce normal work, can also cause. the vibration of rising villous themeda decline villous themeda damages.
As preferably, the described inwall that once sprays oxygen mouth and the angle α of vertical plane are 45-55 °, and the angle β of the inwall of coal slurry nozzle and vertical plane, the outer wall of secondary spray oxygen mouth and the angle of vertical plane are all 65-75 °.The reducing ratio of the outer oxygen mouth of pipe is larger, and object is the oxygen gas flow rate improving, and carries out good atomization, to reach good atomizing effect in vapourizing furnace for the coal water slurry mixture by pre-confounding.
As preferably, described cooling water coil is made up of Inconel600 high temperature material.The material that the material of cooling water coil should select Inconel600 to have stable high-temperature performance, Inconel600 alloy is nickel-chromium-iron-based solid solution strengthened alloy, there is good high-temperature corrosion resistance and antioxidant property, good cold and hot working and welding property, there is below satisfied heat resistance and high plasticity at 700 DEG C.Alloy can be strengthened by cold working, also can use resistance welding, molten weldering or brazing, and suitable for making is born the anti-oxidant part of low load below at 1100 DEG C.Cooling water coil is bending in process, control the speed of bending well, controls deflection and the attenuate amount of tubing, ensures entirety, strength and stiffness after coil pipe moulding.
As preferably, described coal slurry nozzle is made up of GH188 or UMCo-50 high-abrasive material.In order to increase the antiwear property of slurry spray head, therefore select abrasion resistance, GH188 or UMCo-50 that antioxidant property is good.
As preferably, the outside surface of described coal slurry nozzle is coated with ceramic layer.Another damage type in process burner of water-coal-slurry gasification furnace continuous work-ing life is the footpath radiotropism crackle of outer shower nozzle end face and the formation of irregular be full of cracks.Normally move after for some time the edge of outer oxygen nozzle oral area at burner. there will be footpath radiotropism crackle and irregular be full of cracks, thermal shock effect.Because the end face of outer oxygen nozzle is at furnace high-temperature gas, 1200 ~ 1500 DEG C, metallic substance long term operation under such hot conditions, will make it to smelting and forging process, also has higher oxygen gas concentration will form so irregular be full of cracks.Because the oxygen concentration at outer oxygen nozzle place is higher, in the well-oxygenated environment of high temperature, can there is oxidizing reaction in metallic substance.Under high-temperature condition, also can there is certain carburizing effect in metallic substance, and the composition of metallic substance and performance are changed.The sulphur containing in coal, also can make metallic surface that high-temperature sulfidation attack occurs.The crackle of footpath radiotropism oral area, under hot conditions, the release that is stress is also the principal element that outer oxygen nozzle damages.There is higher jet in the exit of process burner, is also the highest region of high-temperature gas return velocity, constantly the washing away of the high-temperature gas that the end face of outer oxygen nozzle is subject to containing solid coal powder particle, the factor damaging.Therefore adopt ceramic layer can improve hardened surface structure properties, ensure surperficial smooth finish,, ensure that the inner quality of material is even.
As preferably, between described secondary spray oxygen mouth end face and burner end standard face, form the pre-confounding of coal water slurry, pre-confounding outlet mean flow rate is generally 12-20 meter per second, the exit velocity of secondary spray oxygen mouth is generally 150-180 meter per second, coal slurry jet exit flow velocity is generally 2-4 meter per second, and the exit velocity that once sprays oxygen mouth is generally 160-200 meter per second.In order to make the fully gasification in vapourizing furnace of coal dust in coal water slurry, must utilize the oxygen of respective numbers to carry out atomization effectively to coal water slurry, coal water slurry atomizing droplet size. and atomizing gas flow, flow velocity, between relation.In order to reach good atomizing effect, the flow velocity of gas must reach certain numerical value.That is to say, the mixture in pre-confounding, flow velocity must reach certain value, contains a large amount of coal dust solid particulates in mixture, and this is the major cause that causes slurry spray head inner wall abrasion.
As preferably, the temperature of cooling water in described cooling water coil is 160-200 DEG C.If it is improper that the temperature of cooling water in cooling water coil is controlled, can cause the low temperature corrosion of coil surface, usually temperature of cooling water is controlled at 160 DEG C above proper.
As preferably, described pipeline mechanism includes the first flange being connected with nozzle mechanism, the first flange is connected with the first threeway by outer tube, the first threeway connects respectively oxygen entrance one time, the second flange, the second flange is connected with the second threeway by coal slurry pipe, coal slurry pipe extend in outer tube, the second threeway connects respectively coal slurry entrance, three-flange, three-flange is connected with the 3rd threeway by inner tube, inner tube extend in coal slurry pipe, the 3rd threeway is connecting secondary oxygen entrance respectively, the 4th flange, the two ends of cooling water coil are connected with cooling water outlet, cooling water inlet.
As preferably, the front end of a described oxygen entrance is provided with the water diversion disk that is communicated with cooling water coil, and the angle γ of this part that cooling water coil is connected with water diversion disk and horizontal plane is 10-20 °.
Therefore, the present invention has the application of the advantages such as vapor pressure is high, gasification furnace structure is simple, production cost is low and slurry spray head abrasion resistance material, improves slurry spray head wear-resisting, has effectively protected outer oxygen nozzle, simple and reasonable for structure.
Brief description of the drawings
Accompanying drawing 1 is a kind of structural representation of the present invention;
Accompanying drawing 2 is that the A of Fig. 1 is to structural representation;
Accompanying drawing 3 is B-B section rotational structure schematic diagram of Fig. 2.
Component, position and numbering in figure: outer tube 1, water diversion disk 2, cooling water coil 3, once spray oxygen mouth 4, coal slurry nozzle 5, secondary spray oxygen mouth 6, oxygen entrance 7, coal slurry entrance 8, secondary oxygen entrance 9, the first flange 10, the second flange 11, the first threeway 12, coal slurry pipe 13, the second threeway 14, three-flange 15, inner tube 16, the 3rd threeway 17, the 4th flange 18, cooling water inlet 19, cooling water outlet 20.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: a kind of high strength vapourizing furnace process burner of this example, Fig. 3 as shown in Figure 1, Figure 2,, comprise outer tube 1, outer tube one end is connected with nozzle mechanism by flange, nozzle mechanism is outer has cooling water coil 3 around volume, cooling water coil is made up of Inconel600 high temperature material, and the temperature of cooling water in cooling water coil is 160-200 DEG C.Nozzle mechanism includes and once sprays oxygen mouth 4, once sprays in oxygen mouth and is provided with coal slurry nozzle 5, and coal slurry nozzle is made up of GH188 and UMCo-50 high-abrasive material, and the outside surface of coal slurry nozzle is coated with ceramic layer.Once spray between oxygen mouth and coal slurry nozzle and be provided with the gap that can allow oxygen pass through, in coal slurry nozzle, be provided with secondary spray oxygen mouth 6, between coal slurry nozzle and secondary spray oxygen mouth, be provided with the gap that can allow coal slurry pass through, in secondary spray oxygen mouth, be provided with the passage that can allow oxygen pass through, secondary spray oxygen mouth tip-to-face distance burner end standard face has certain retraction amount, the end of once spraying oxygen mouth, coal slurry nozzle, secondary spray oxygen mouth be all reducing type, once sprays oxygen mouth, coal slurry nozzle, secondary and sprays oxygen mouth and be communicated with oxygen entrance 7, coal slurry entrance 8, secondary oxygen entrance 9 by pipeline mechanism respectively.Pipeline mechanism includes the first flange 10 being connected with nozzle mechanism, the first flange is connected with the first threeway 12 by outer tube, the first threeway connects respectively oxygen entrance 7 one time, the second flange 11, the second flange is connected with the second threeway 14 by coal slurry pipe 13, coal slurry pipe extend in outer tube, the second threeway connects respectively coal slurry entrance 8, three-flange 15, three-flange is connected with the 3rd threeway 17 by inner tube 16, inner tube extend in coal slurry pipe, the 3rd threeway is connecting secondary oxygen entrance 9 respectively, the 4th flange 18, the two ends of cooling water coil are connected with cooling water outlet 20, cooling water inlet 19.The front end of an oxygen entrance is provided with the water diversion disk 2 that is communicated with cooling water coil 3, and the angle γ of this part that cooling water coil is connected with water diversion disk and horizontal plane is 15 °.The spray oxygen amount of secondary spray oxygen mouth is 20% of the oxygen amount of always spraying, and all the other are the spray oxygen amount of once spraying oxygen mouth.Once spray the inwall of oxygen mouth and the angle α of vertical plane is 50 °, the angle β of the inwall of coal slurry nozzle and vertical plane, the outer wall of secondary spray oxygen mouth and the angle of vertical plane are all 70 °.Between secondary spray oxygen mouth end face and burner end standard face, form the pre-confounding of coal water slurry, pre-confounding outlet mean flow rate is generally 12-20 meter per second, the exit velocity of secondary spray oxygen mouth is generally 150-180 meter per second, coal slurry jet exit flow velocity is generally 2-4 meter per second, and the exit velocity that once sprays oxygen mouth is generally 160-200 meter per second.
When use, whole process burner is linked in vapourizing furnace by flange, at oxygen entrance 7, secondary oxygen entrance 9, coal slurry entrance 8 interior difference oxygen and a coal slurry, oxygen, coal slurry respectively from once spraying oxygen mouth 4, secondary spray oxygen mouth 6, coal slurry nozzle 5 sprays, mix at pre-confounding, after ignition device, coal slurry and purity oxygen are in the cigarette burning of burner, and the main component that reaction generates is the gas mixture of carbon monoxide and hydrogen.
The foregoing is only specific embodiments of the invention, but constitutional features of the present invention is not limited to this, any those skilled in the art is in the field of the invention, and the variation of doing or modification are all encompassed among the scope of the claims of the present invention.
Claims (9)
1. a high strength vapourizing furnace process burner, comprise outer tube (1), it is characterized in that described outer tube (1) one end is connected with nozzle mechanism by flange, nozzle mechanism is outer has cooling water coil (3) around volume, nozzle mechanism includes and once sprays oxygen mouth (4), once spray and in oxygen mouth, be provided with coal slurry nozzle (5), once spray between oxygen mouth and coal slurry nozzle and be provided with the gap that can allow oxygen pass through, in coal slurry nozzle, be provided with secondary spray oxygen mouth (6), between coal slurry nozzle and secondary spray oxygen mouth, be provided with the gap that can allow coal slurry pass through, in secondary spray oxygen mouth, be provided with the passage that can allow oxygen pass through, secondary spray oxygen mouth tip-to-face distance burner end standard face has certain retraction amount, once spray oxygen mouth, coal slurry nozzle, the end of secondary spray oxygen mouth is all reducing type, once spray oxygen mouth, coal slurry nozzle, secondary spray oxygen mouth is communicated with an oxygen entrance (7) by pipeline mechanism respectively, coal slurry entrance (8), secondary oxygen entrance (9), the spray oxygen amount of secondary spray oxygen mouth is the 15-30% that always sprays oxygen amount, all the other are the spray oxygen amount of once spraying oxygen mouth.
2. a kind of high strength vapourizing furnace process burner according to claim 1, it is characterized in that the described inwall of once spray oxygen mouth (4) and the angle α of vertical plane are 45-55 °, the angle β of the inwall of coal slurry nozzle and vertical plane, the outer wall of secondary spray oxygen mouth (6) and the angle of vertical plane are all 65-75 °.
3. a kind of high strength vapourizing furnace process burner according to claim 1 and 2, the cooling water coil (3) described in it is characterized in that is made up of Inconel600 high temperature material.
4. a kind of high strength vapourizing furnace process burner according to claim 1 and 2, the coal slurry nozzle (5) described in it is characterized in that is made up of GH188 or UMCo-50 high-abrasive material.
5. a kind of high strength vapourizing furnace process burner according to claim 1 and 2, is characterized in that the outside surface of described coal slurry nozzle (5) is coated with ceramic layer.
6. a kind of high strength vapourizing furnace process burner according to claim 1 and 2, it is characterized in that forming the pre-confounding of coal water slurry between described secondary spray oxygen mouth (6) end face and burner end standard face, pre-confounding outlet mean flow rate is generally 12-20 meter per second, the exit velocity of secondary spray oxygen mouth is generally 150-180 meter per second, coal slurry nozzle (6) exit velocity is generally 2-4 meter per second, and the exit velocity that once sprays oxygen mouth (4) is generally 160-200 meter per second.
7. a kind of high strength vapourizing furnace process burner according to claim 1 and 2, is characterized in that the temperature of cooling water in described cooling water coil (3) is 160-200 DEG C.
8. a kind of high strength vapourizing furnace process burner according to claim 1 and 2, it is characterized in that described pipeline mechanism includes the first flange (10) being connected with nozzle mechanism, the first flange is connected with the first threeway (12) by outer tube (1), the first threeway connects respectively an oxygen entrance (7), the second flange (11), the second flange is connected with the second threeway (14) by coal slurry pipe (13), coal slurry pipe extend in outer tube, the second threeway connects respectively coal slurry entrance (8), three-flange (15), three-flange is connected with the 3rd threeway (17) by inner tube (16), inner tube extend in coal slurry pipe, the 3rd threeway is connecting secondary oxygen entrance (9) respectively, the 4th flange (18), the two ends of cooling water coil (3) are connected with cooling water outlet (20), cooling water inlet (19).
9. a kind of high strength vapourizing furnace process burner according to claim 1 and 2, the front end that it is characterized in that a described oxygen entrance (7) is provided with the water diversion disk (2) that is communicated with cooling water coil (3), and the angle γ of this part that cooling water coil is connected with water diversion disk and horizontal plane is 10-20 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310208760.7A CN103305284B (en) | 2013-05-30 | 2013-05-30 | High-strength gasifier process burner |
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| CN201310208760.7A CN103305284B (en) | 2013-05-30 | 2013-05-30 | High-strength gasifier process burner |
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| CN103305284B true CN103305284B (en) | 2014-10-08 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104099135A (en) * | 2014-07-22 | 2014-10-15 | 中国华能集团清洁能源技术研究院有限公司 | High-temperature resistant burner shield for gasification furnace |
| CN104327881B (en) * | 2014-10-16 | 2017-01-11 | 煤炭科学技术研究院有限公司 | Liquid continuous slag-removal fixed bed gasification furnace and gasification method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102399594A (en) * | 2011-12-30 | 2012-04-04 | 华东理工大学 | Method for optimizing operating working condition of 'Texaco gasifier' on line |
| CN103013574A (en) * | 2012-11-26 | 2013-04-03 | 清华大学 | Water-coal-slurry nozzle |
| CN103045306A (en) * | 2012-12-26 | 2013-04-17 | 中国东方电气集团有限公司 | Coal water slurry bubble atomizing nozzle |
| CN203346349U (en) * | 2013-05-30 | 2013-12-18 | 杭州浙南压缩机有限公司 | Process burning nozzle of high-strength gasification furnace |
-
2013
- 2013-05-30 CN CN201310208760.7A patent/CN103305284B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102399594A (en) * | 2011-12-30 | 2012-04-04 | 华东理工大学 | Method for optimizing operating working condition of 'Texaco gasifier' on line |
| CN103013574A (en) * | 2012-11-26 | 2013-04-03 | 清华大学 | Water-coal-slurry nozzle |
| CN103045306A (en) * | 2012-12-26 | 2013-04-17 | 中国东方电气集团有限公司 | Coal water slurry bubble atomizing nozzle |
| CN203346349U (en) * | 2013-05-30 | 2013-12-18 | 杭州浙南压缩机有限公司 | Process burning nozzle of high-strength gasification furnace |
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