CN101446413B - Combined type multi-injector burner - Google Patents

Combined type multi-injector burner Download PDF

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Publication number
CN101446413B
CN101446413B CN2008102465794A CN200810246579A CN101446413B CN 101446413 B CN101446413 B CN 101446413B CN 2008102465794 A CN2008102465794 A CN 2008102465794A CN 200810246579 A CN200810246579 A CN 200810246579A CN 101446413 B CN101446413 B CN 101446413B
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burner
igniter
cooling jacket
fuel gas
coal
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CN101446413A (en
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信伟
蔡德生
郭进军
马冬
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Changzheng Engineering Co Ltd
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Changzheng Engineering Co Ltd
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Abstract

The invention provides a combined type multi-injector burner with a flammable powder body, which comprises an igniter burner positioned at the center of the burner and a plurality of process combustion nozzles which are evenly formed on the periphery of the igniter burner in the circumferential direction, wherein, each process combustion nozzle comprises a coal dust passage positioned at the center of each process combustion nozzle and a first annular oxidizer passage arranged outside the coal dust passage. In the combined type multi-injector burner, a plurality of process combustion nozzles and the igniter burner are assembled together, the structure is compact, and the combustion efficiency as well as the gasification efficiency are increased; the maintenance of each single process combustion nozzle is flexible, and the disassembly and the assembly are convenient; the process combustion nozzles can limberly adjust the load of the burner, mediums in a hearth can be mixed evenly through repeated impacts, the flame fullness degree is good, and a uniform multilayer cooling structure can protect the burner effectively and prolong the service life of the burner.

Description

A kind of combined type multi-injector burner
Technical field
The present invention relates to a kind of burner, particularly a kind ofly be used for gasification furnace and heating furnace and be the combined type multi-injector burner of fuel with the combustible powder.
Background technology
In the existing Coal Gasification Technology, with the technology comparative maturity of Texaco and Shell, application is comparatively extensive at home, and both have their own characteristics each aspect burner design.
The Texaco gasification furnace burner is fuel with the water-coal-slurry, and this burner is divided into three layers of passage, and the central passage medium is an oxygen, and second layer channel media is a water-coal-slurry, and the outermost layer channel media still is an oxygen.The burner of this structure is very ripe, but the deficiency of self is also arranged: when (1) high speed water coal slurry flows shower nozzle is had very strong wearing and tearing, therefore must often change wearing terrain (the wearing terrain life-span was generally 30～60 days); (2) water-coal-slurry and oxygen adopt straight flow structure to make combustion flame longer, and corresponding body of heater length also increases; (3) burner uses the coil pipe cooling structure, when dismounting, very easily causes damage; (4) the burner sparking mode adopts the preheating burner to refractory brick heating in the body of heater, and fire box temperature is switched after reaching the ignition temperature of water-coal-slurry, to water-coal-slurry igniting, sparking mode complex operation; (5) this structural requirement coal can be made into high concentration, high stability, the water-coal-slurry that rheological behavior is good; Require coal to wear into the coal slurry that distributes by certain particle size; In order to improve the characteristic of water-coal-slurry, also to add certain quantity of additive, even so; Still have the part coal not suit to process water-coal-slurry, the scope of application is limited to.
Shell coal dust gasification equipment is fuel with the dry coal powder, adopts high-pressure inert gas to deliver into gasification furnace, and it is all very low to spray flow velocity from being transported to of fine coal, very little to the burner wearing and tearing.The scope of application to coal is wide, and is insensitive to granularity, cohesiveness, sulfur content, oxygen content and the ash content of coal of coal.The structure of every cover gasification installation is uniformly distributed along the circumference in the stove middle and lower part by 4～6 cover burners, and burner forms flames in opposing direction in stove, and synthesis gas is from the discharging of gasification furnace upper end, and slag discharges from the lower end.Each independent burner is a straight flow structure, and fine coal has the water-cooling jacket protection, and is simple in structure, is convenient to maintenance.The deficiency of Shell burner is: (1) quadruplet burner installation accuracy requires very high; (2) itself is not with igniter, needs in gasification furnace, to add in addition the igniting device and lights a fire; (3) mixed process of Shell burner coal dust and oxygen mainly leans on the structure that liquidates in the stove to realize that single burner can't work independently, so the Shell burner scope of application is little, only is applicable to the liquidate body of heater of structure of flame.
For the problems referred to above, current multiple improvement structure proposed.For example Chinese invention patent application publication number CN1710333A discloses a kind of burner, and it adopts water-cooling wall to substitute the coil pipe cooling structure of Texaco burner; And adopted the mode of multistage cooling, so that protect burner effectively; Be provided with and be coiled in ignition burner a plurality of coal dust carrier pipes all around, the conveying capacity of scalable coal dust.Yet what this burner adopted is integral design, and dismounting is safeguarded inconvenient.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of novel burner, to solve the problem that exists in the prior art.
Above-mentioned purpose of the present invention realizes through a kind of modular multijet combustible powder burner is provided.This burner comprises: the igniter burner that is positioned at the burner center; Along the circumferential direction evenly be arranged on the peripheral a plurality of process burners of ignition burner.Wherein, each process burner comprises: the coal dust passage that is positioned at the process burner center; First oxidant channel with the annular that is arranged on the coal dust passage outside; Said igniter burner comprises: the fuel gas passage that is positioned at this igniter burner center; Be arranged on the igniter in the fuel gas passage; Second oxidant channel with the annular that is arranged on the fuel gas passage outside.Through a kind of like this structure, can after ignition operation, promptly stop the use of igniter burner, the coal dust and the oxidant that rely on process burner to provide carry out work.Simultaneously, can regulate the live load of burner through the process burner quantity that increases or reduce work; Load regulation range is big, and means are flexible.
Preferably, be arranged on first cooling jacket in first oxidant channel outside.
Preferably, said igniter burner also is included between fuel gas passage and said second oxidant channel and is provided with second cooling jacket, and said second oxidant channel is provided with the 3rd cooling jacket outward.
Preferably, said first, second is all double-decker with the 3rd cooling jacket, comprises internal layer and skin, and wherein cooling medium is got into by internal layer and discharges from skin.
Through cooling jacket all being set, can prolong burner service life greatly in each passage outside.And, can protect burner more effectively through adopting double-deck cooling duct structure.
Preferably, said igniter burner and said process burner are fixed through mounting flange.When maintenance, can the part that need repairing be dismantled individually and keeped in repair, and can not exert an influence other parts.
Preferably, the number of said process burner is 2-10.
Preferably, said igniter is movably.Because igniter (fire rod) is movably, therefore behind firing coal-dust, can withdraws from, thereby can avoid ablating.
In addition, burner of the present invention also has the following advantages:
Coal dust adopts straight tube to carry, and resistance is little, and speed is low, and is little to the wearing and tearing of burner; Mix with the oxidant bump in the outside ejection back, forms independent flammule, can form the uniform flame of a circle after the adjacent flame impingement, thereby guarantee that the fire box temperature field is even, even flow field; The fuel gas passage and second oxidant channel are changed to inert protective gas protection burner in completion igniting task postposition, guarantee not have high temperature gases recirculating to burner channel.
Description of drawings
Fig. 1 is the cutaway view of the agent structure of burner of the present invention;
Fig. 2 is the more detailed partial schematic diagram of the burner head among Fig. 1;
Fig. 3 is the cross-sectional schematic of the single process burner in the burner of the present invention.
Reference numerals list:
1. igniter, the 2. cover plate of fuel gas passage, 3. fuel gas inlet, the 4. cooling medium of second cooling jacket outlet; 5. the 3rd cooling jacket, the 6. cover plate of the 3rd cooling jacket, the 7. cooling medium of the 3rd cooling jacket outlet, 8. fine coal inlet; 9. the cover plate of first oxidant channel, 10. first oxidant channel inlet, the cooling medium outlet of 11. first cooling jackets, 12. first cooling jackets; 13. the clamping plate of first cooling jacket, 14. second cooling jackets, the cover plate of 15. second cooling jackets, the clamping plate of 16. second cooling jackets; 17. the cooling medium of second cooling jacket inlet, the cover plate of 18. second oxidant channels, 19. second oxidant channels inlet, the cooling medium inlet of 20. the 3rd cooling jackets; 21. the clamping plate of the 3rd cooling jacket, the cover plate of 22. first cooling jackets, the cooling medium inlet of 23. first cooling jackets, 24. mounting flanges; 25. the fine coal carrier pipe of process burner, 26. fuel gas passages, the coolant guiding channel of 27. second cooling jackets, 28. second oxidant channels; 29. the coolant guiding channel of the 3rd cooling jacket, 30. first coolant guiding channels, 31. first oxidant channels, the fine coal passage of 32. process burners.
The specific embodiment
To combine the accompanying drawing of the present invention description detailed in addition below to the most preferred configuration of burner of the present invention.
Referring to Fig. 1, burner of the present invention comprises igniter burner that is arranged on the middle part and a plurality of process burners that are arranged on the igniter burner outside.Process burner along the circumferential direction is arranged in around the igniter burner equably, and is fixed together through mounting flange 24 and igniter burner, and mounting flange 24 is tightly connected with the body of heater (not shown).Said process burner is preferably 2-10, regulates the live load of burner through the process burner quantity that increases or reduce work.Through using 24 pairs of process burners of mounting flange and igniter burner to fix, when maintenance, can the part that need repairing be dismantled individually and keeped in repair, and can not exert an influence other parts.
Referring to Fig. 3, process burner comprises combustible powder (for example, the coal dust) passage that is positioned at the center, and it is formed by coal dust carrier pipe 25.Coal dust gets into the coal dust passage through coal powder entrance 8.Coal dust passage arranged outside has by first oxidant channel 31, and passage 31 is through 9 sealings of the first oxidant channel cover plate, and oxidant gets into this passage through first oxidant channel inlet 10.Arranged outside at first oxidant channel has cover plate 22 sealings of first cooling jacket, 12, the first cooling jackets 12 by first cooling jacket.First cooling jacket 12 is a double-decker, and is two-layer inside and outside for example by the clamping plate 13 of first cooling jacket first coolant guiding channel, 30 (see figure 2)s being divided into, and cooling medium is by inlet 23 admission passage internal layers, through being flowed out by outlet 11 behind the passage skin.
Refer again to Fig. 1 and Fig. 2, igniter burner comprises the fuel gas passage 26 by 2 sealings of fuel gas passage cover plate that is positioned at the center, and fuel gas gets into said fuel gas passage through fuel gas inlet 3.Fuel gas passage arranged outside second cooling jacket 14, it is by 15 sealings of the second cooling jacket cover plate.Second cooling jacket 14 also can be provided with double-decker; Its mode and first cooling jacket are similar; Two-layer inside and outside promptly by the clamping plate 16 of second cooling jacket second coolant guiding channel 27 being divided into, cooling medium is got into by inlet 17, is flowed out by outlet 4 through 27 backs, cooling duct.
Second cooling jacket, 14 arranged outside, second oxidant channel, 28 (see figure 2)s, it is by cover plate 18 sealings of second oxidant channel.Oxidant gets into this passage through second oxidant channel inlet 19, and from this passage below ejection, after the fuel gas of fuel gas passage 26 ejections mixes, after igniter 1 is got angry, is lighted, and forms igniter burner flame.Second oxidant channel, 28 arranged outside the 3rd cooling jacket 5 is by 6 sealings of the 3rd cooling duct cover plate.Equally, the 3rd cooling jacket 5 also can be provided with double-decker according to the mode identical with first and second cooling jackets.
Through cooling jacket all being set, can prolong burner service life greatly in each gas passage outside; And all cooling jackets all can adopt double-deck cooling duct structure, in the time of can preventing medium reaction in the stove more effectively liberated heat to the damage of burner, thereby the protection burner.
Igniter 1 is arranged in the fuel gas passage, and igniter is movably (it can be realized through various existing technology), after lighting igniter burner, can withdraw from, thereby can avoid being in for a long time damages such as causing ablation under the condition of high temperature.After fire rod was withdrawn from, the fire rod mouth can block with blind flange.
Burner furnace interior branch can adopt high temperature resistant, the anti-specific alloy material that washes away to process, for example HAYNES 188 alloys.
Fine coal in the process burner fine coal pipe is carried as carrier by assist gas, and the fine coal pipe is the straight tube form, and transporting resistance is little.Choose suitable caliber and guarantee that fine coal speed is 5～10m/s, very little to the wearing and tearing of pipe and spout.Spray into the oxygen bump of burner hearth through first oxidant channel and mix one independent flame of formation after being lighted by igniter burner rapidly with the outside behind the fine coal ejection burner.A plurality of process burners form a plurality of independent flammules in stove, adjacent flame is bump mixing mutually after leaving the burner certain distance, form the uniform flame of a circle.Flame is very strong to the radiation of burner, therefore is provided with cooling jacket protection, and the medium in the chuck can be water or other cooling mediums.
Groundwork principle of the present invention is following: the fuel gas and second oxidant channel mix after igniter is lighted; Drop into coal dust behind the flame stabilization; Coal dust mixes at the burner hearth inner impact with first oxidant; By the igniter burner flame ignition, can the fuel gas and second oxidant channel be replaced into inert gas with the protection burner subsequently.
Groundwork process of the present invention is following: the fuel gas of igniter burner sprays into burner hearth after through fuel gas passage 26, and oxidant sprays into burner hearth through second oxidant channel 28, and two strands of gases mix the back and in burner hearth, got angry by igniter 1 and lights.Open the coal dust and the first oxidant feed valve, utilize the flame of igniter burner that coal dust is lighted, close the fuel gas and second oxidant channel then, and be replaced into the inert gas shielding igniter burner.Entire work process has cooling medium to pass through in three layers of cooling jacket all the time, with the protection burner.During the burner power cut-off, stop the coal dust charging earlier, stop oxidant feed at last.
Through cell burner of the present invention, overcome the deficiency of prior art, good mixing effect, long service life; Compact conformation, flame is sturdy, and efficiency of combustion is high, and self has ignition function; Load regulation range is big, and single burner also can be worked, and the scope of application is extensive.
Below combined most preferred embodiment of the present invention that burner of the present invention has been made detailed description; Yet those skilled the in art will appreciate that; Under the situation that does not deviate from essence of the present invention and scope, can modifications and variations of the present invention are.Will be understood that most preferred embodiment of the present invention is descriptive, but not determinate, scope of the present invention should be confirmed according to appended independent claims.

Claims (7)

1. combined type multi-injector burner, it comprises: the igniter burner that is positioned at the burner center; Along the circumferential direction evenly be arranged on the peripheral a plurality of process burners of igniter burner,
It is characterized in that each said process burner comprises: the coal dust passage that is positioned at the process burner center; With first oxidant channel that is arranged on the coal dust passage outside;
Said igniter burner comprises: the fuel gas passage that is positioned at this igniter burner center; Be arranged on the igniter in the fuel gas passage; Second oxidant channel with the annular that is arranged on the fuel gas passage outside.
2. burner according to claim 1 is characterized in that,
Said process burner also comprises first cooling jacket that is arranged on said first oxidant channel outside.
3. burner according to claim 2 is characterized in that,
Said igniter burner also is included between fuel gas passage and said second oxidant channel and is provided with second cooling jacket, and said second oxidant channel is provided with the 3rd cooling jacket outward.
4. burner according to claim 3 is characterized in that,
Said first, second with the 3rd cooling jacket at least one be double-decker, comprise internal layer and skin, wherein cooling medium is discharged by internal layer entering and from skin.
5. burner according to claim 1 is characterized in that,
Said igniter burner and said process burner are fixed through mounting flange.
6. burner according to claim 1 is characterized in that,
The number of said process burner is 2-10.
7. according to each described burner among the claim 1-6, it is characterized in that,
Said igniter is movably.
CN2008102465794A 2008-12-29 2008-12-29 Combined type multi-injector burner Active CN101446413B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN2008102465794A CN101446413B (en) 2008-12-29 2008-12-29 Combined type multi-injector burner

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CN101446413B true CN101446413B (en) 2012-03-28

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CN105542868A (en) * 2016-01-27 2016-05-04 西安航天源动力工程有限公司 Integrated coal-water-slurry process burner
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