CN104373935B - A kind of powdered coal burner for airflow bed gasification furnace - Google Patents
A kind of powdered coal burner for airflow bed gasification furnace Download PDFInfo
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- CN104373935B CN104373935B CN201410531367.6A CN201410531367A CN104373935B CN 104373935 B CN104373935 B CN 104373935B CN 201410531367 A CN201410531367 A CN 201410531367A CN 104373935 B CN104373935 B CN 104373935B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/485—Entrained flow gasifiers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
- C10J3/506—Fuel charging devices for entrained flow gasifiers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
- F23D2201/20—Fuel flow guiding devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2214/00—Cooling
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
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- General Engineering & Computer Science (AREA)
Abstract
The invention provides a kind of powdered coal burner for airflow bed gasification furnace.This powdered coal burner includes central tube and surrounds the peripheral tube of this central tube with one heart.The cross section of central tube shower nozzle straight section is sharp-pointed acute angle, and two limits (i.e. inclined side outside the central tube shower nozzle of central tube shower nozzle straight section and its correspondence) length of this acute angle is bigger, central tube shower nozzle straight section is provided above the fine coal passage that flow deflector, central tube and peripheral tube surround and is provided with spiral stream guidance room.The powdered coal burner of the present invention can be effectively reduced the hyperthermia radiation area at central tube shower nozzle and intensity, extend its service life, facilitate dismounting and the maintenance of nozzle, improve the mixed effect of fine coal and oxidant, realize the long-period stable operation of coal gasification, reduce the cost of coal gasification.
Description
Technical field
The invention belongs to coal gasification field, especially relate to a kind of powdered coal burner for airflow bed gasification furnace.
Background technology
Rich coal resources in China, oil, natural gas resource are the poorest, and coal accounts for the proportion of total energy consumption and is about 70%, accounts for the 50% of worldwide coal total quantity consumed.Traditional coal utilization mode is directly burning, and not only efficiency is low, and seriously polluted, causes China's sulfur dioxide, nitrogen oxides, Mercury In The Air discharge capacity to be in the whole world the first.Coal gasification is the important channel of clean coal utilization, and this technology has adapted to the sustainable development requirement of China's economy, and development in recent years is rapid.Solid coal is become gaseous hydrocarbon, CO, H by Coal Gasification Technology exactly2Deng the technology of gas, its purpose obtains clean energy resource and industrial chemicals exactly.Its principle is exactly that coal, coal tar or petroleum coke issue biochemical reaction with gasifying agent (air, oxygen, steam, hydrogen etc.) in uniform temperature and pressure, is coal gas by the organic matter transformation in coal, coal tar or petroleum coke.Air-flow bed coal-gasification technique can be divided into again coal water slurry gasification and coal gasification.The combustion medium of burner used by coal water slurry gasification is the coal slurry containing about 40% moisture, and the combustion medium of burner used by coal gasification is density is the solid coal dust of about 300kg/Nm3, the viscosity property of two kinds of combustion mediums, flow behavior, density, granularity, transporting velocity etc. all differ.Therefore, the requirement to the equipment for gasification such as gasification furnace, burner also differs.Particularly with all the more so for burner.The configured burner on gasification furnace of gasified raw material burns in being injected into gasification furnace.Wherein, the charging of water coal slurry burner is gas-liquid mixing, and the charging of powdered coal burner is gas-solid mixing, and mechanism of mass transfer, kinetics differ greatly, and the design of burner also emphasizes particularly on different fields.
Coal gasification has gasification efficiency height, good performance indexes, feature that application coal is wide compared with coal water slurry gasification, has higher Technological Economy and environment-friendly advantage.In fine coal gasification process, powdered coal burner is the nucleus equipment of gasification furnace, and it is expensive, maintenance, replacement cost height, bigger to the economic influence of gasifier operation.But owing to burner is placed in gasification furnace, work under bad environment, its life-span is the shortest, typically at about 3 months.Therefore, the key of gasification installation long-term operation is had become as the service life of powdered coal burner.Owing to powdered coal burner is easiest to occur the counter-fire face that position is burner of ablation, Ablation cause is essentially from the direct calcination of the hyperthermia radiation in gasification furnace or flame.
In order to reduce hyperthermia radiation or the destructiveness of flame calcination of burner side towards the fire, many technology are developed.Such as, ceramic powder is sprayed on the outer surface of gasification furnace burner by CN1300870A, is used for completely cutting off high temperature corrosion medium.CN101956982A opens multiple micro through-hole on burner is heated annular panel, and cooling water is sprayed by these through holes and by thermal evaporation, thus consumes the heat that the high temperature of gasification furnace radiates for burner.CN103333717A uses and arranges the refractoriness thermal insulation layer more than 1770 DEG C to the hyperthermia radiation stopping in gasification furnace at the front end face of burner.More conventional cool-down method arranges multiple cooling water jecket exactly between each material channel, is used for improving the cooling effect at shower nozzle position, such as described in CN10403496A, CN101446413A.The above cooling measure alleviates the destructiveness of burner most external material channel side towards the fire to a certain extent, but for the part between oxygen agent passage and coal dust channel, its high temperature problem is not obviously improved, main cause is that oxidant is after going out burner channel, pyroreaction is there is rapidly with the fuel gas in stove, form high-temperature region at burner head, thus accelerate the hyperthermia radiation between oxidant and coal dust channel or high temperature sintering.In order to extend the service life at this position, cooling water jecket is set the most between the two channels.By the forced circulation of chuck inner cooling water, remove rapidly thermic load, thus play the purpose of cooling surface temperature.The actually setting of water leg also brings along two other defect.One is that water leg self exists certain heating surface area, while removing thermic load, this heating surface area is also accepting heat radiation, and becomes burner side towards the fire and be most susceptible to the position of high temperature, often after burner runs a period of time, surface just cracks and drainage occurs.Two is maintenance and the dismounting relatively difficulty of water leg structure, needs the maintaining unit of specialty to dismount and keep in repair, costly.
Additionally, for the good mixing realizing fine coal and oxidant, mostly prior art is that this swirl vane is not good enough to the mixed effect of material near coal dust channel exit and oxidant channel exit design swirl vane.And swirl vane is flatly to be welded on the tube wall of material channel, is impacted by high-velocity stream again while subject self gravitation, in actual moving process, spinning disk obscission often occurs.
Summary of the invention
It is an object of the invention to provide and a kind of can alleviate the powdered coal burner for powder coal gasification furnace that the high temperature failure of materials inside channel outlet, dismounting and material mixed effect easy to maintenance, each are good.
The technical scheme is that a kind of powdered coal burner for airflow bed gasification furnace, including central tube 1 and the peripheral tube 2 that surrounds this central tube with one heart, central tube 1 and peripheral tube 2 conically shrink in the side near side towards the fire, central tube 1 is oxidant channel, the circular passage that central tube 1 outer wall and peripheral tube 2 inwall are formed is fine coal passage, peripheral tube 2 is double-deck cooling water jecket, first cooling water entered chuck internal layer by cooling water inlet 13, enters outside chuck by the slype at peripheral tube 2 shower nozzle position and is flowed out by coolant outlet 14.Wherein, the contract half-angle α of central tube 1 shower nozzle is 10 °～20 °, and outside angle of inclination beta is 70 °～80 °, and the contract half-angle ε of peripheral tube 2 shower nozzle is 15 °～25 °, central tube 1 shower nozzle straight section height h1It is h with the ratio of central tube 1 nozzle diameter d1: d=0.5～2, central tube 1 and distance h of peripheral tube 2 vents face2It is h with the ratio of central tube 1 nozzle diameter d2: d=0.1～0.5.
Preferably jet size is: the contract half-angle α of central tube 1 shower nozzle is 15 °, and outside angle of inclination beta is 75 °, and the contract half-angle ε of peripheral tube 2 shower nozzle is 20 °, central tube 1 shower nozzle straight section height h1It is h with the ratio of central tube 1 nozzle diameter d1: d=1, central tube 1 and distance h of peripheral tube 2 vents face2It is h with the ratio of central tube 1 nozzle diameter d2: d=0.2.This preferred version can reduce the scaling loss risk of mesotube shower nozzle largely.The most also finding, this preferred version can also improve the Flow Field Distribution of gasification furnace, forms the dross that gasification furnace furnace wall is good, improves carbon conversion efficiency, and is greatly improved the operating load of gasification furnace.
The outside angle of inclination beta of powdered coal burner central tube 1 shower nozzle of the present invention is relatively big, central tube 1 shower nozzle straight section height h1The highest with the ratio of central tube 1 nozzle diameter d, it is consequently formed sharp-pointed acute angle cross section, and two limits (i.e. inclined side outside central tube 1 shower nozzle of central tube 1 shower nozzle straight section and its correspondence) length of this acute angle is bigger.On the one hand this design makes the area contraction of the side towards the fire of central tube 1 into a line, reduces shower nozzle heating surface area foremost；On the other hand, owing to the heat radiation of side towards the fire falls sharply in gradient, the thermal exposure that outside central tube 1 shower nozzle, inclined side is subject to reduces the most greatly.In prior art, the improvement of the cooling measure of powdered coal burner central tube, it is mostly to concentrate on and improves the structure of cooling water jecket to improve cooling effect, and generally believe that this center tube structure without cooling water jecket of the present invention is more easy to scaling loss.But actual production has been found that, removes cooling jacket, by changing the design size of central tube shower nozzle so that it is cross section is sharp-pointed acute angle and after this acute angle has the longer length of side, is difficult on the contrary be burnt, and service life is longer, runs more stable.Reason is that the design of the present invention reduces total heating surface greatly and amasss.In addition; improved burner structure acutangulates due to outlet, thus decreases backflowing of oxidant so that fine coal channel outlet forms stable coal dust and inert gas cover; decrease the radiation intensity to burner head, be effectively protected the head of burner.Meanwhile, after removing cooling water jecket, central tube is easier to dismounting；Burner head is removable parts, simply cuts away burner head, can more easily keep in repair after removing water leg during maintenance.
In the present invention, central tube 1 and distance h of peripheral tube 2 vents face2It is h with the ratio of central tube 1 nozzle diameter d2: d=0.1～0.5.Owing to the heat radiation of nozzle position falls sharply in gradient, therefore central tube 1 vents face retracts into inside peripheral tube 2 vents face, is conducive to reducing heat radiation further.Meanwhile, again due to h2Cross conference and affect the mixed effect of material, therefore h2With the ratio of d no more than 0.5.
The contract half-angle α of central tube 1 shower nozzle is 10 °～20 °; simultaneously; the contract half-angle ε of peripheral tube 2 shower nozzle is 15 °～25 °; this carrier gas and the fine coal that can be designed so that from the ejection of fine coal passage forms an air-flow protection layer; this protective layer can be achieved in the further protection to central tube shower nozzle to a certain extent by central tube shower nozzle and the heat radiation isolation in gasification furnace.
Further, some equally distributed flow deflectors 3 on same circumference are set on the internal face above the powdered coal burner central tube 1 shower nozzle straight section of the present invention, described flow deflector 3 is the most in a certain angle with central tube 1, this design can accelerate the oxidant flow velocity of central tube 1 nozzle, thus accelerate to take away the heat at central tube shower nozzle, the mixed effect of oxidant and fine coal can be strengthened simultaneously.Prior art is generally i.e. carried on the back fire face above the shower nozzle of oxidant channel and is arranged swirl vane, and swirl vane is flatly to be welded on the tube wall of oxidant channel, is impacted by high-velocity stream again, it is possible to cause coming off while subject self gravitation.The alternative swirl vane of flow deflector 3 on central tube straight section of the present invention, overcomes the deficiency of existing swirl vane, realizes good mixed function while lowering the temperature to central tube shower nozzle.
Described flow deflector 3 is 15 °～35 ° with the axial angle theta of central tube 1, preferably 20 °.
nullFurther，Fine coal import 11 is axially arranged on fine coal passage at an angle with powdered coal burner，The fine coal conveying pipe 5 axially in parallel with central tube 1 with 2 to 4 by distributor 12 communicates，Described 2 to 4 fine coal conveying pipe 5 is evenly distributed in fine coal passage，And the cross-sectional area summation of these fine coal passages is corresponding to the cross-sectional area of fine coal import 11，Fine coal conveying pipe 5 bottom arranges spirality diversion chamber 4，Fine coal conveying pipe 5 communicates with spirality diversion chamber 4，Described spirality diversion chamber 4 is by a top spiral rectangular tube 6、Article one, lower part helical rectangular tube 7 and the contact pin 8 connecting two spiral rectangular tubes surround，One end of described contact pin 8 is connected to the shortest fine coal conveying pipe exit，The other end connects with lower part helical rectangular tube 7，Article two, spiral rectangular tube 6 and 7 extends in parallel，And with fine coal conveying pipe 5 axial angle γ be 20～45 °，Contact pin 8 is 10～30 ° with the axial angle δ of fine coal conveying pipe 5，Spiral rectangular tube 6、The hand of spiral of spiral rectangular tube 7 and contact pin 8 is identical with the hand of spiral of the flow deflector 3 above central tube 1 shower nozzle straight section.
The powdered coal burner of the present invention can be used in multi-jet fine coal airflow bed gasification furnace.Such as, being provided with the powdered coal burner of 3-6 the present invention at top of gasification furnace, described powdered coal burner is evenly distributed and parallel in the axis of gasification furnace on a circumference, the circle centre position mount point ignition combustor of described powdered coal burner place circumference.
Flow deflector 3 in central tube 1 and the spirality diversion chamber 4 in fine coal passage act on jointly; coal dust and inert gas that the oxidant that central tube 1 is sprayed sprays with fine coal passage define good mixing; and central tube 1 nozzle; oxidant is wrapped up by coal dust and inert gas, and the head being effectively protected burner will not be ablated.
Central tube 1 is not had the structure of water leg by one aspect of the present invention instead, and the orifice design of central tube 1 is become sharp-pointed acute angle, in order to reduce central tube 1 spout area, increase coal dust and the stability of inert gas cover by hyperthermia radiation；On the other hand, flow deflector 3 and spirality diversion chamber 4 are set, work in coordination with and add water conservancy diversion effect.Further enhance the stability of its external inert gas protective layer.
The hyperthermia radiation area at central tube shower nozzle and intensity can be effectively reduced by said structure design, extend its service life, facilitate dismounting and the maintenance of nozzle, improve the mixed effect of fine coal and oxidant, realize the long-period stable operation of coal gasification, reduce the cost of coal gasification.
Accompanying drawing explanation
Fig. 1 is the structural representation of powdered coal burner of the present invention
Fig. 2 is powdered coal burner shower nozzle profile in Fig. 1
Fig. 3 is powdered coal burner central tube inwall flow deflector distribution schematic diagram of the present invention
Fig. 4 is that fine coal passage is containing the distribution schematic cross-section of fine coal conveying pipe during 2 fine coal conveying pipes
Fig. 5 is that fine coal passage is containing the distribution schematic cross-section of fine coal conveying pipe during 3 fine coal conveying pipes
Fig. 6 is that fine coal passage is containing the partial cross-section cloth schematic diagram of fine coal conveying pipe during 4 fine coal conveying pipes
Fig. 7 is the structural representation of spirality diversion chamber in powdered coal burner fine coal passage of the present invention
The expanded view of Tu8Shi Tu7Zhong spirality diversion chamber
Fig. 9 is the burner distribution schematic diagram of the gasification furnace roof applying powdered coal burner of the present invention
In figure:
1, central tube 2, peripheral tube 3, central tube 1 flow deflector
4, spirality diversion chamber 5, fine coal conveying pipe 6, top spiral coil
7, lower part helical coil pipe 8, contact pin 9, powdered coal burner
10, start-up burner 11, fine coal import 12, distributor
13, cooling water inlet 14, coolant outlet
Detailed description of the invention
Embodiment 1
One preferred version of powdered coal burner of the present invention is shown in Fig. 1, including central tube 1 and the peripheral tube 2 that surrounds this central tube with one heart, central tube 1 and peripheral tube 2 conically shrink in the side near side towards the fire, central tube 1 is oxidant channel, the circular passage that central tube 1 outer wall and peripheral tube 2 inwall are formed is fine coal passage, peripheral tube 2 is double-deck cooling water jecket, cooling water is initially entered chuck internal layer by cooling water inlet 13, enters outside chuck by the slype at peripheral tube 2 shower nozzle position and is flowed out by coolant outlet 14.Fig. 2 is powdered coal burner shower nozzle profile in Fig. 1, and wherein, the contract half-angle α of central tube 1 shower nozzle is 10 °, and outside angle of inclination beta is 70 °, and the contract half-angle ε of peripheral tube 2 shower nozzle is 15 °, central tube 1 shower nozzle straight section height h1It is h with the ratio of central tube 1 nozzle diameter d1: d=0.5, central tube 1 and distance h of peripheral tube 2 vents face2It is h with the ratio of central tube 1 nozzle diameter d2: d=0.1.
Embodiment 2
Another preferred version of powdered coal burner of the present invention is, powdered coal burner includes central tube 1 and surrounds the peripheral tube 2 of this central tube with one heart, central tube 1 and peripheral tube 2 conically shrink in the side near side towards the fire, central tube 1 is oxidant channel, the circular passage that central tube 1 outer wall and peripheral tube 2 inwall are formed is fine coal passage, peripheral tube 2 is double-deck cooling water jecket, cooling water is initially entered chuck internal layer by cooling water inlet 13, enters outside chuck by the slype at peripheral tube 2 shower nozzle position and is flowed out by coolant outlet 14.Wherein, the contract half-angle α of central tube 1 shower nozzle is 20 °, and outside angle of inclination beta is 80 °, and the contract half-angle ε of peripheral tube 2 shower nozzle is 25 °, central tube 1 shower nozzle straight section height h1It is h with the ratio of central tube 1 nozzle diameter d1: d=2, central tube 1 and distance h of peripheral tube 2 vents face2It is h with the ratio of central tube 1 nozzle diameter d2: d=0.5.
Embodiment 3
Another preferred version of powdered coal burner of the present invention is, powdered coal burner includes central tube 1 and surrounds the peripheral tube 2 of this central tube with one heart, central tube 1 and peripheral tube 2 conically shrink in the side near side towards the fire, central tube 1 is oxidant channel, the circular passage that central tube 1 outer wall and peripheral tube 2 inwall are formed is fine coal passage, peripheral tube 2 is double-deck cooling water jecket, cooling water is initially entered chuck internal layer by cooling water inlet 13, enters outside chuck by the slype at peripheral tube 2 shower nozzle position and is flowed out by coolant outlet 14.Wherein, the contract half-angle α of central tube 1 shower nozzle is 15 °, and outside angle of inclination beta is 75 °, and the contract half-angle ε of peripheral tube 2 shower nozzle is 20 °, central tube 1 shower nozzle straight section height h1It is h with the ratio of central tube 1 nozzle diameter d1: d=1, central tube 1 and distance h of peripheral tube 2 vents face2It is h with the ratio of central tube 1 nozzle diameter d2: d=0.2.
Comparative example 1
One contrast scheme of powdered coal burner of the present invention is, in the powdered coal burner dimensional parameters of contrast scheme, the outside angle of inclination beta of central tube 1 shower nozzle is 85 °, and other parameter is in the same manner as in Example 3.
Comparative example 2
Another contrast scheme of powdered coal burner of the present invention is, in the powdered coal burner dimensional parameters of contrast scheme, the outside angle of inclination beta of central tube 1 shower nozzle is 60 °, and other parameter is in the same manner as in Example 3.
Comparative example 3
Another contrast scheme of powdered coal burner of the present invention is, in the powdered coal burner dimensional parameters of contrast scheme, the outside angle of inclination beta of central tube 1 shower nozzle is 50 °, and other parameter is in the same manner as in Example 3.
Embodiment 4
The cycle of operation contrast of each burner in embodiment 1 to 3 and comparative example 1 to 3.With oxygen (purity is for 99.6%) as oxidant, nitrogen is fine coal carrier gas, and carrier gas fine coal flow velocity is 8m/s.Run the effect assessment after some cycles see table:
Embodiment 5
Another preferred version of powdered coal burner of the present invention is, powdered coal burner includes central tube 1 and surrounds the peripheral tube 2 of this central tube with one heart, central tube 1 and peripheral tube 2 conically shrink in the side near side towards the fire, central tube 1 is oxidant channel, the circular passage that central tube 1 outer wall and peripheral tube 2 inwall are formed is fine coal passage, peripheral tube 2 is double-deck cooling water jecket, cooling water is initially entered chuck internal layer by cooling water inlet 13, enters outside chuck by the slype at peripheral tube 2 shower nozzle position and is flowed out by coolant outlet 14.Wherein, the contract half-angle α of central tube 1 shower nozzle is 15 °, and outside angle of inclination beta is 75 °, and the contract half-angle ε of peripheral tube 2 shower nozzle is 20 °, central tube 1 shower nozzle straight section height h1It is h with the ratio of central tube 1 nozzle diameter d1: d=1, central tube 1 and distance h of peripheral tube 2 vents face2It is h with the ratio of central tube 1 nozzle diameter d2: d=0.2.
Arranging some equally distributed flow deflectors 3 on same circumference on internal face above described central tube 1 shower nozzle straight section, the structure of flow deflector is shown in Fig. 3.Described flow deflector 3 is 20 ° with the axial angle theta of central tube 1.
Embodiment 6
Another preferred version of powdered coal burner of the present invention is, powdered coal burner includes central tube 1 and surrounds the peripheral tube 2 of this central tube with one heart, central tube 1 and peripheral tube 2 conically shrink in the side near side towards the fire, central tube 1 is oxidant channel, the circular passage that central tube 1 outer wall and peripheral tube 2 inwall are formed is fine coal passage, peripheral tube 2 is double-deck cooling water jecket, cooling water is initially entered chuck internal layer by cooling water inlet 13, enters outside chuck by the slype at peripheral tube 2 shower nozzle position and is flowed out by coolant outlet 14.Wherein, the contract half-angle α of central tube 1 shower nozzle is 15 °, and outside angle of inclination beta is 75 °, and the contract half-angle ε of peripheral tube 2 shower nozzle is 20 °, central tube 1 shower nozzle straight section height h1It is h with the ratio of central tube 1 nozzle diameter d1: d=1, central tube 1 and distance h of peripheral tube 2 vents face2It is h with the ratio of central tube 1 nozzle diameter d2: d=0.2.
Arranging some equally distributed flow deflectors 3 on same circumference on internal face above described central tube 1 shower nozzle straight section, the structure of flow deflector is shown in Fig. 3.Described flow deflector 3 is 20 ° with the axial angle of central tube 1.
Fine coal import 11 is axially arranged on fine coal passage at an angle with powdered coal burner, the fine coal conveying pipe 5 axially in parallel with central tube 1 with 3 by distributor 12 communicates, described 3 fine coal conveying pipe 5 is evenly distributed in fine coal passage on same circumference, and the cross-sectional distribution figure of 3 fine coal conveying pipes is shown in Fig. 5.
Fine coal conveying pipe 5 bottom arranges spirality diversion chamber 4, and fine coal conveying pipe 5 communicates with spirality diversion chamber 4.The structure of fine coal conveying pipe 5 and spirality diversion chamber 4 is shown in that Fig. 7, the expanded view of spirality diversion chamber 4 are shown in Fig. 8.
Described spirality diversion chamber 4 is surrounded by 6, lower part helical rectangular tube 7 of a top spiral rectangular tube and the contact pin 8 connecting two spiral rectangular tubes, one end of described contact pin 8 is connected to the shortest fine coal conveying pipe exit, the other end connects with lower part helical rectangular tube 7, article two, spiral rectangular tube 6 and 7 extends in parallel, and be 40 ° with the axial angle γ of fine coal conveying pipe 5, contact pin 8 is 20 ° with the axial angle δ of fine coal conveying pipe 5.The hand of spiral of spiral rectangular tube 6, spiral rectangular tube 7 and contact pin 8 is identical with the hand of spiral of the flow deflector 3 above central tube 1 shower nozzle straight section.
In this embodiment, fine coal conveying pipe can be configured as 2 or 4, and its cross-sectional distribution figure is shown in Fig. 4 and Fig. 6 respectively.
Embodiment 7
Fig. 9 is the burner distribution map of the gasification furnace roof applying powdered coal burner of the present invention.Be provided with the powdered coal burner 9 of three present invention at top of gasification furnace, described three powdered coal burners 9 are evenly distributed and parallel in the axis of gasification furnace on a circumference, the circle centre position mount point ignition combustor 10 of described three powdered coal burner place circumference.
Although the foregoing describing the preferred version of the present invention, it will be appreciated by those of skill in the art that this is merely illustrative of, protection scope of the present invention is defined by the appended claims.These embodiments, on the premise of without departing substantially from the principle of the present invention and essence, can be made various changes or modifications, but these changes and amendment each fall within protection scope of the present invention by those skilled in the art.
Claims (6)
1. for the powdered coal burner of airflow bed gasification furnace, including central tube (1) with surround this central tube with one heart
Peripheral tube (2), central tube (1) and peripheral tube (2) conically shrink in the side near side towards the fire, peripheral tube (2)
For double-deck cooling water jecket, cooling water is initially entered chuck internal layer, by peripheral tube by cooling water inlet (13)
(2) slype at shower nozzle position enters outside chuck and is flowed out by coolant outlet (14), it is characterised in that: center
The contract half-angle α of pipe (1) shower nozzle is 10 °～20 °, and outside angle of inclination beta is 70 °～80 °, peripheral tube (2) shower nozzle
Contract half-angle ε is 15 °～25 °, central tube (1) shower nozzle straight section height h1Ratio with central tube (1) nozzle diameter d
Example is h1: distance h of d=0.5～2, central tube (1) and peripheral tube (2) vents face2Straight with central tube (1) spout
The ratio of footpath d is h2: d=0.1～0.5, the internal face above described central tube (1) shower nozzle straight section is arranged some
Equally distributed flow deflector (3) on same circumference, described flow deflector (3) and central tube (1) axially angle theta is
20 °, fine coal import (11) is axially arranged on fine coal passage, by distributor (12) at an angle with powdered coal burner
Fine coal conveying pipe (5) axially in parallel with central tube (1) with 2 to 4 communicates, described 2 to 4 fine coal conveying pipe
(5) being evenly distributed in fine coal passage, fine coal conveying pipe (5) bottom arranges spirality diversion chamber (4), and fine coal carries
Pipe (5) communicate with spirality diversion chamber (4), described spirality diversion chamber (4) by top spiral rectangular tube (6),
Article one, lower part helical rectangular tube (7) and the contact pin (8) connecting two spiral rectangular tubes surround, described contact pin (8)
One end be connected to the shortest fine coal conveying pipe exit, the other end connects with lower part helical rectangular tube (7), two spirals
Rectangular tube (6) and (7) extend in parallel, and with fine coal conveying pipe (5) axial angle γ be 20～45 °, contact pin (8)
With fine coal conveying pipe (5) axial angle δ be 10～30 °, spiral rectangular tube (6), spiral rectangular tube (7) and
The hand of spiral of contact pin (8) is identical with the hand of spiral of the flow deflector (3) above central tube (1) shower nozzle straight section.
Powdered coal burner for airflow bed gasification furnace the most according to claim 1, it is characterised in that: central tube (1)
The contract half-angle α of shower nozzle is 15 °, and outside angle of inclination beta is 75 °, and the contract half-angle ε of peripheral tube (2) shower nozzle is 20 °,
Central tube (1) shower nozzle straight section height h1It is h with the ratio of central tube (1) nozzle diameter d1: d=1, central tube (1)
Distance h with peripheral tube (2) vents face2It is h with the ratio of central tube (1) nozzle diameter d2: d=0.2.
Powdered coal burner for airflow bed gasification furnace the most according to claim 1, it is characterised in that: two spirals
The axial angle γ of rectangular tube (6) and (7) and fine coal conveying pipe (5) is 40 °, and contact pin (8) manages (5) with fine coal conveying
Axial angle δ be 20 °.
4. being provided with an airflow bed gasification furnace for powdered coal burner described in any one of claims 1 to 3, its feature exists
In: at top of gasification furnace, the powdered coal burner (9) described in 3-6 any one of claims 1 to 3, described powder are installed
Coal burner is evenly distributed and parallel with the axis of gasification furnace on a circumference, described powdered coal burner place circumference
Circle centre position is provided with start-up burner (10).
5. the powdered coal burner described in any one of claims 1 to 3 is in the application in air-flow bed coal-gasification field, and its feature exists
In: central tube (1) conveying oxidant, the circular passage conveying that central tube (1) outer wall and peripheral tube (2) inwall are formed
Carrying the fine coal of inert gas, fine coal and oxidant are injected into gasification furnace combustion chamber at burner tip and carry out oxygen debt gasification
Reaction.
6. reducing the thermal-radiating method in powdered coal burner central tube shower nozzle position, described powdered coal burner includes central tube
(1) peripheral tube (2) of this central tube, central tube (1) and peripheral tube (2) and are with one heart surrounded near side towards the fire
Side conically shrink, central tube (1) is oxidant channel, central tube (1) outer wall and peripheral tube (2) inwall shape
The circular passage become is fine coal passage, and peripheral tube (2) is double-deck cooling water jecket, and cooling water is first by cooling water
Import (13) enters chuck internal layer, enters outside chuck and by cooling down by the slype at peripheral tube (2) shower nozzle position
Water out (14) flows out, it is characterised in that: the Cross section Design at powdered coal burner central tube (1) shower nozzle position is become sharp-pointed
Acute angle, wherein, the contract half-angle α of central tube (1) shower nozzle is 10 °～20 °, and outside angle of inclination beta is 70 °～80 °,
The contract half-angle ε of peripheral tube (2) shower nozzle is 15 °～25 °, central tube (1) shower nozzle straight section height h1With central tube (1)
The ratio of nozzle diameter d is h1: distance h of d=0.5～2, central tube (1) and peripheral tube (2) vents face2In with
The ratio of heart pipe (1) nozzle diameter d is h2: d=0.1～0.5, on the internal face above central tube (1) shower nozzle straight section
Arranging some equally distributed flow deflector (3) on same circumference, flow deflector (3) is axial with central tube (1)
In a certain angle, fine coal import (11) is axially arranged on fine coal passage at an angle with powdered coal burner, passes through
Distributor (12) axially in parallel with central tube (1) with 2 to 4 fine coal conveying pipe (5) communicate, described 2 to 4
Root fine coal conveying pipe (5) is evenly distributed in fine coal passage, and fine coal conveying pipe (5) bottom arranges spirality diversion chamber (4),
Fine coal conveying pipe (5) communicates with spirality diversion chamber (4), and described spirality diversion chamber (4) is by top spiral side
Shape pipe (6), a lower part helical rectangular tube (7) and one connect the contact pin (8) of two spiral rectangular tubes and surround, institute
The one end stating contact pin (8) is connected to the shortest fine coal conveying pipe exit, the other end and lower part helical rectangular tube (7) phase
Connecing, two spiral rectangular tubes extend in parallel, and with fine coal conveying pipe (5) axial angle γ be 20～45 °, contact pin (8)
It is 10～30 ° with the axial angle δ of fine coal conveying pipe (5), and makes spiral rectangular tube (6), spiral rectangular tube (7)
Identical with the hand of spiral of the flow deflector (3) above central tube (1) shower nozzle straight section with the hand of spiral of contact pin (8).
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| CN201410531367.6A CN104373935B (en) | 2014-10-11 | 2014-10-11 | A kind of powdered coal burner for airflow bed gasification furnace |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107353940B (en) * | 2016-05-10 | 2019-10-11 | 神华集团有限责任公司 | Cyclonic divider, gasification nozzle and gasification system |
| CN107654998B (en) * | 2016-07-25 | 2019-11-08 | 神华集团有限责任公司 | Burner and gasification furnace |
| CN107763663A (en) * | 2016-08-23 | 2018-03-06 | 翼特新能源科技（上海）有限公司 | Solid fuel combustion apparatus and its application method |
| CN106190329A (en) * | 2016-08-26 | 2016-12-07 | 安徽科达洁能股份有限公司 | Coal dust burner |
| CN106147876B (en) * | 2016-08-30 | 2021-12-07 | 安徽科达洁能股份有限公司 | Gasification burner |
| CN106807320A (en) * | 2017-01-20 | 2017-06-09 | 彭州市长庆全成技术开发有限公司 | Nozzle |
| CN110129101A (en) * | 2019-06-12 | 2019-08-16 | 宁夏神耀科技有限责任公司 | It is powdered coal pressuring gasified to use process burner |
| CN110577846B (en) * | 2019-09-12 | 2021-02-05 | 杨建平 | Combustion system and burner |
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| CN204165047U (en) * | 2014-10-11 | 2015-02-18 | 科林未来能源技术(北京)有限公司 | A kind of powdered coal burner and airflow bed gasification furnace |
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| US20060147853A1 (en) * | 2005-01-06 | 2006-07-06 | Lipp Charles W | Feed nozzle assembly and burner apparatus for gas/liquid reactions |
| CN2908510Y (en) * | 2005-12-14 | 2007-06-06 | 华东理工大学 | Multi-nozzle water coal fluid or pulverized coal gasification furnace for water coal fluid or pulverized coal gasification |
| CN100374531C (en) * | 2005-12-29 | 2008-03-12 | 华东理工大学 | Method for preparing synthetic gas by three-channel nozzle and partial oxidation of solid carbon-containing substance |
| CN100534893C (en) * | 2007-02-05 | 2009-09-02 | 华东理工大学 | Nozzle for preparing synthesized gas by partial oxidation of liquid fuel |
| CN101050385B (en) * | 2007-05-11 | 2010-12-29 | 华东理工大学 | Burner of possessing multiplepath entrances of solid fuel, and application |
| CN102031152B (en) * | 2010-10-13 | 2013-11-13 | 神华集团有限责任公司 | Process nozzle and system for gasifying water coal slurry and application thereof |
| CN202647752U (en) * | 2012-05-15 | 2013-01-02 | 上海锅炉厂有限公司 | Load-controllable multi-channel liquid fuel gasification burner |
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