CN103305284A - High-strength gasifier process burner - Google Patents
High-strength gasifier process burner Download PDFInfo
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- CN103305284A CN103305284A CN2013102087607A CN201310208760A CN103305284A CN 103305284 A CN103305284 A CN 103305284A CN 2013102087607 A CN2013102087607 A CN 2013102087607A CN 201310208760 A CN201310208760 A CN 201310208760A CN 103305284 A CN103305284 A CN 103305284A
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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 and is, 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, and (publication number: CN103013574 A), it comprises fuel gas pipe, has the fuel gas passage in the fuel gas pipe, is provided with ignition mechanism in the fuel gas passage; The first oxygen hose, the first oxygen hose are 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 are set in the outside of the first oxygen hose to limit the coal water slurry passage of annular between water-coal slurry pipe and the first oxygen hose; The second oxygen hose, the second oxygen hose are 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 the cooling channel of annular between cooling tube and the second oxygen hose; The lower end of cooling tube links to each other to seal the lower of cooling channel with the lower end of the second oxygen hose; Be provided with isolated tube between cooling tube and the second oxygen hose, isolated tube is isolated into the water entry of annular and the water exit of annular with the cooling channel, and water exit is communicated with the lower end of water entry; The outside wall surface inboard and the second oxygen hose that water entry is positioned at water exit is provided with a plurality of radiating pieces for heat radiation; Also comprise closure member, the lower end of cooling tube links to each other 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, and the second and the 3rd predetermined distance is less than the first predetermined distance.But the outlet of the central oxygen pipe of this burner is straight pipe type, and speed is slower when spraying central oxygen like this, and the premix efficient of coal slurry and oxygen is lower, and adopts the cooling tube of jacketed type so that cooling performance is relatively poor.
Summary of the invention
The present invention provides a kind of high strength vapourizing furnace process burner, it mainly is that the outlet of the central oxygen pipe of the existing burner of solution prior art is straight pipe type, speed is slower when spraying central oxygen like this, the premix efficient of coal slurry and oxygen is lower, and adopts the cooling tube of jacketed type so that relatively 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 to have cooling water coil around volume, nozzle mechanism includes and once sprays the oxygen mouth, once spray and be provided with the coal slurry nozzle in the oxygen mouth, once spray between oxygen mouth and the coal slurry nozzle and be provided with the gap that can allow oxygen pass through, be provided with secondary spray oxygen mouth in the coal slurry nozzle, be provided with the gap that can allow coal slurry pass through between coal slurry nozzle and the secondary spray oxygen mouth, be provided with the passage that can allow oxygen pass through in the secondary spray oxygen mouth, secondary spray oxygen mouth tip-to-face distance burner end standard face has certain retraction amount, once spray the oxygen mouth, the coal slurry nozzle, the end of secondary spray oxygen mouth all is the reducing type, once spray the oxygen mouth, the coal slurry nozzle, secondary spray oxygen mouth is communicated with an oxygen entrance by pipeline mechanism respectively, the coal slurry entrance, secondary oxygen entrance, the spray oxygen amount of secondary spray oxygen mouth is the 15-30% of total spray oxygen amount, and all the other are the spray oxygen amount of once spraying the oxygen mouth.
The purpose of cooling water coil is set, and is partly to be difficult for producing brilliant in changing for the protection burner is in high-temperature gas.
The outlet of burner central oxygen pipe is designed to the reducing form, and purpose 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 also is designed to the reducing form, make the coal water slurry that enters pre-confounding possess certain pressure, in pre-confounding, improve rheological property, the effect of coal water slurry, guarantee the atomizing effect of coal water slurry after leaving burner.No matter be central oxygen, or the circulation area of coal water slurry and outer oxygen, all need to satisfy the separately traffic requirement of medium, 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, is generally 20%, 25% of total oxygen demand, and all the other are all as outer oxygen.The central oxygen amount can not be too little, not so do not reach dilution and booster action to coal slurry.The 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 the central oxygen amount increases, the axial velocity amount of burner outlet material is increased, radial velocity component reduces, its result makes the flame profile of whole burner outlet become elongated, can't 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 the slag increases, cause the reduction of gasification efficiency, and can make flame fling furnace bottom, damage the cone brick, causing that chilling ring crosses cause thermal damage and reduce normal operation, can also cause. the vibration of rising villous themeda decline villous themeda damages.
As preferably, describedly once spray the inwall of oxygen mouth and the angle α of vertical plane is 45-55 °, 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 all are 65-75 °.The reducing ratio of the outer oxygen mouth of pipe is larger, and purpose is the oxygen gas flow rate that improves, and carries out good atomizing for the coal water slurry mixture by pre-confounding, in order to reach good atomizing effect in vapourizing furnace.
As preferably, described cooling water coil is made by the Inconel600 high temperature material.The material that the material of cooling water coil should select Inconel600 to have stable high-temperature performance, the Inconel600 alloy is nickel-chromium-iron-based solid solution strengthened alloy, have good high-temperature corrosion resistance and antioxidant property, good cold and hot working and welding property, have satisfied heat resistance and high plasticity below 700 ℃.Alloy can be strengthened by cold working, also can use resistance welding, molten weldering or soldering to connect, and suitable for making is at the anti-oxidant part that bears low load below 1100 ℃.Cooling water coil will be controlled the speed of bending well in bending process, deflection and the attenuate amount of control tubing guarantee integral body, strength and stiffness after the coil pipe moulding.
As preferably, described coal slurry nozzle is made by 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.After burner normally moves for some time, the edge of outer oxygen nozzle oral area. footpath radiotropism crackle and irregular be full of cracks can appear, thermal shock effect.Because the end face of outer oxygen nozzle is at furnace high-temperature gas, 1200 ~ 1500 ℃, 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 irregular be full of cracks like this.Because the oxygen concentration at outer oxygen nozzle place is higher, oxidizing reaction can occur in metallic substance in the well-oxygenated environment of high temperature.Under the high-temperature condition, certain carburizing effect also can occur in metallic substance, and the composition of metallic substance and performance are changed.The sulphur that contains in the coal also can make the metallic surface that high-temperature sulfidation attack occurs.The crackle of footpath radiotropism oral area, under hot conditions, the release that is stress also is the principal element that outer oxygen nozzle damages.There is higher jet in the exit of process burner, also is the highest zone of high-temperature gas return velocity, the end face of outer oxygen nozzle be subject to containing solid coal powder particle high-temperature gas constantly wash away the factor that damages.Therefore adopt ceramic layer can improve the hardened surface structure properties, guarantee the smooth finish on surface,, guarantee that the inner quality of material is even.
As preferably, form the pre-confounding of coal water slurry between described secondary spray oxygen mouth end face and the burner end standard face, pre-confounding outlet mean flow rate is generally the 12-20 meter per second, the exit velocity of secondary spray oxygen mouth is generally the 150-180 meter per second, coal slurry jet exit flow velocity is generally the 2-4 meter per second, and the exit velocity that once sprays the oxygen mouth is generally the 160-200 meter per second.In order to make the fully gasification in vapourizing furnace of coal dust in the coal water slurry, must utilize the oxygen of respective numbers effectively to atomize 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 the pre-confounding, flow velocity must reach certain value, contains a large amount of coal dust solid particulates in the mixture, and this is the major cause that causes the slurry spray head inner wall abrasion.
As preferably, the temperature of cooling water in the described cooling water coil is 160-200 ℃.If it is improper that the temperature of cooling water in the cooling water coil is controlled, can cause the low temperature corrosion of coil surface, usually temperature of cooling water is controlled at more than 160 ℃ proper.
As preferably, described pipeline mechanism includes the first flange that is connected with nozzle mechanism, the first flange is connected with the first threeway by outer tube, the first threeway connects respectively the oxygen entrance one time, the second flange, the second flange is connected with the second threeway by the coal slurry pipe, the coal slurry pipe extend in the outer tube, the second threeway connects respectively the coal slurry entrance, three-flange, three-flange is connected with the 3rd threeway by inner tube, inner tube extend in the 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, the 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, and is simple and reasonable for structure.
Description of 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;
Component, position and numbering among the 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, such as Fig. 1, Fig. 2, Fig. 3, comprise outer tube 1, outer tube one end is connected with nozzle mechanism by flange, nozzle mechanism is outer to have cooling water coil 3 around volume, cooling water coil is made by the Inconel600 high temperature material, and the temperature of cooling water in the cooling water coil is 160-200 ℃.Nozzle mechanism includes and once sprays oxygen mouth 4, once sprays to be provided with coal slurry nozzle 5 in the oxygen mouth, and the coal slurry nozzle is made by 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 the coal slurry nozzle and be provided with the gap that can allow oxygen pass through, be provided with secondary spray oxygen mouth 6 in the coal slurry nozzle, be provided with the gap that can allow coal slurry pass through between coal slurry nozzle and the secondary spray oxygen mouth, be provided with the passage that can allow oxygen pass through in the secondary spray oxygen mouth, 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 all is the reducing type, once sprays oxygen mouth, coal slurry nozzle, secondary spray oxygen mouth respectively by oxygen entrance 7 of pipeline mechanism connection, coal slurry entrance 8, secondary oxygen entrance 9.Pipeline mechanism includes the first flange 10 that is 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, the coal slurry pipe extend in the 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 the 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 total spray oxygen amount, and all the other are the spray oxygen amount of once spraying the oxygen mouth.Once spraying the inwall of oxygen mouth and the angle α of vertical plane is 50 °, 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 all are 70 °.Form the pre-confounding of coal water slurry between secondary spray oxygen mouth end face and the burner end standard face, pre-confounding outlet mean flow rate is generally the 12-20 meter per second, the exit velocity of secondary spray oxygen mouth is generally the 150-180 meter per second, coal slurry jet exit flow velocity is generally the 2-4 meter per second, and the exit velocity that once sprays the oxygen mouth is generally the 160-200 meter per second.
During use, whole process burner is linked in the vapourizing furnace by flange, at oxygen entrance 7, secondary oxygen entrance 9, coal slurry entrance 8 interior respectively oxygen and coal slurries, oxygen, coal slurry are respectively from once spraying oxygen mouth 4, secondary spray oxygen mouth 6,5 ejections of coal slurry nozzle, mix at pre-confounding, coal slurry and purity oxygen are in the cigarette burning of burner after the ignition device, and the main component that reaction generates is the gas mixture of carbon monoxide and hydrogen.
The above only is specific embodiments of the invention, but constitutional features of the present invention is not limited to this, and any those skilled in the art is in the field of the invention, and the variation of doing or modification all are encompassed among the claim of the present invention.
Claims (9)
1. 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 to have cooling water coil (3) around volume, nozzle mechanism includes and once sprays oxygen mouth (4), once spray and be provided with coal slurry nozzle (5) in the oxygen mouth, once spray between oxygen mouth and the coal slurry nozzle and be provided with the gap that can allow oxygen pass through, be provided with secondary spray oxygen mouth (6) in the coal slurry nozzle, be provided with the gap that can allow coal slurry pass through between coal slurry nozzle and the secondary spray oxygen mouth, be provided with the passage that can allow oxygen pass through in the secondary spray oxygen mouth, secondary spray oxygen mouth tip-to-face distance burner end standard face has certain retraction amount, once spray the oxygen mouth, the coal slurry nozzle, the end of secondary spray oxygen mouth all is the reducing type, once spray the oxygen mouth, the 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% of total spray oxygen amount, and all the other are the spray oxygen amount of once spraying the oxygen mouth.
2. a kind of high strength vapourizing furnace process burner according to claim 1, it is characterized in that describedly once spraying the inwall of oxygen mouth (4) and the angle α of vertical plane is 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 all are 65-75 °.
3. a kind of high strength vapourizing furnace process burner according to claim 1 and 2 is characterized in that described cooling water coil (3) made by the Inconel600 high temperature material.
4. a kind of high strength vapourizing furnace process burner according to claim 1 and 2 is characterized in that described coal slurry nozzle (5) made by 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 the burner end standard face, pre-confounding outlet mean flow rate is generally the 12-20 meter per second, the exit velocity of secondary spray oxygen mouth is generally the 150-180 meter per second, coal slurry nozzle (6) exit velocity is generally the 2-4 meter per second, and the exit velocity that once sprays oxygen mouth (4) is generally the 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 the described cooling water coil (3) is 160-200 ℃.
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) that is 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), the coal slurry pipe extend in the 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 the 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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| 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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| CN103305284A true CN103305284A (en) | 2013-09-18 |
| CN103305284B CN103305284B (en) | 2014-10-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104327881A (en) * | 2014-10-16 | 2015-02-04 | 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104327881A (en) * | 2014-10-16 | 2015-02-04 | 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 |
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| Publication number | Publication date |
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| CN103305284B (en) | 2014-10-08 |
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