CN206160102U - High -efficient low NOx segmentation coupling burner of colm - Google Patents
High -efficient low NOx segmentation coupling burner of colm Download PDFInfo
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- CN206160102U CN206160102U CN201621252624.3U CN201621252624U CN206160102U CN 206160102 U CN206160102 U CN 206160102U CN 201621252624 U CN201621252624 U CN 201621252624U CN 206160102 U CN206160102 U CN 206160102U
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Abstract
The utility model provides a high -efficient low NOx segmentation coupling burner of colm, belongs to efficient clean coal burning technical field. The problem of current coal combustion technology when coal fuel inferior, unable realize simultaneously low NOx discharge with high combustion efficiency and combustion processes in need to be equipped with the coal -grinding system is solved. The utility model discloses a N fluidized bed and a buggy stove, the coarse coal gas output tube of a N fluidized bed all with the coarse coal gas burner intercommunication of buggy stove, the fluidized bed includes three reaction zone, follow the supreme dense region that is in proper order down, whirlwind disengagement zone and dilute -phase zone, the fluidized bed bottom is equipped with the center bevel body, the top is equipped with the shutter, set up an at least laminarization air flow nozzle on the outside lateral wall of fluidized bed, the broken air flow nozzle of at least one deck, rotatory overgrate air spray tube and feeding device, the furnace of buggy stove is rectangle or the straight section of thick bamboo structure of circular shape for the horizontal cross -section, the coarse coal gas burner of buggy stove comprises at least one coarse coal gas blowout mouth and at least one one -level air distribution spout. Mainly used colm burning field.
Description
Technical field
The utility model belongs to high effect cleaning coal combustion technology field.
Background technology
In China, the thermoelectricity of the direct combustion power generation of coal is up to more than 70% ratio, wherein, most thermal power plants use
Colm, and the ratio that can exploit colm in coal reserves up to 50 ﹪ or so, the only ratio of anthracite and meager coal have been verified by China
With regard to close 30 ﹪, and high-quality anthracite and meager coal are little；The colm of import is also more and more.Although have developed both at home and abroad various
The coal combustion technology for differing from one another of various kinds, shows on fire retardant low volatile anthracite, meager coal, coke, three high coal combustions, by
Often condition each other in fast etc. the condition of realize catching fire steady combustion, efficient, low NOx, not slagging scorification and load responding, therefore, while reality
Fast etc. the coal combustion technology of steady combustion, efficient, low NOx, not slagging scorification and load responding that now catches fire is researched and developed and still faced a severe challenge.
For fire retardant low volatile anthracite combustion, prior art provides a kind of boiler, and corner tangential firing is put at angle
Device is translated to be adjusted in the middle of high heat flux furnace wall and spout has a down dip, and burner is vertical bias combustion device or low speed routine
Burner, the combustion stability that catches fire is improved, and the reducing atmosphere region of extension suppresses beneficial to NOx, but its tangential firing is steady
Qualitative difference, the presence of reducing atmosphere corner recirculating zone make the region wall-cooling surface be easy to slagging scorification and high temperature corrosion.
Existing combustion method of anthracite coal, puts quadrangle tangential circle Secondary Air and eliminates a kind of existing pot by burner region angle
The adverse effect of chimney corner portion recirculating zone, but the concrete grammar for suppressing NOx is not described, and also the coal of traditional coal dust firing is adapted to
Property difference the shortcomings of do not overcome.
Prior art additionally provides another kind of combustion method for reducing recirculating fluidized bed NOx, by cyclone separator by coal
Combustion process is divided into main chamber reducing atmosphere burning coal particle and flue internal oxidition atmosphere after-flame two stages of flying dust, by
In being that partial oxidation or gasification can carry out relatively independent control to main chamber reducing atmosphere burning, NOx emission is reduced,
But due to recirculating fluidized bed low-temperature burning, the carbon in deslagging because the independent control of high-temp combustion cannot be implemented, not by after-flame,
So, cause to improve efficiency of combustion and attenuating NOx discharge cannot be while realize, efficiency of combustion aspect cannot be competing with coal-powder boiler
Strive.So, the different phase of thermochemical conversion cannot independently be strengthened accordingly or suppress, it is impossible to while solving each of fire retardant coal
The problem of kind.
Additionally, business application is also shown that the advantage of coal dust firing is high combustion efficiency, but coal mill system is needed, coal is adapted to
Property it is poor, thermal NO x growing amounts are high, and steady combustion of catching fire needs know-how, reducing atmosphere burning to need special Anti-slagging and high temperature rotten
There is the tertiary air for being difficult to process in erosion technology, middle warehouse pulverized coal carried by hot air system；CFBC is with the obvious advantage, standby coal letter
Singly, coal adaptability is strong, load responding is fast, there is no thermal NO x, the stable combustion technology that catches fire is simple and reliable, reducing atmosphere is low
Temperature burning without the need for special Anti-slagging and high temperature corrosion technology, but flying dust and deslagging phosphorus content height, low efficiency of combustion, serious wear,
The coal dust utilization that standby coal measures system is tailed over has difficulties, scale single series technical merit is low；Using segmentation independent control burning
Concept, by segmentation be pyrolyzed, gasify, burning and using new construction efficient coupling in burner hearth, two kinds of combustion systems being combined
Come, break the mutual restriction of high effect cleaning coal combustion requirement, two kinds of combustion systems of competence exertion each advantage and overcome each bad
Gesture, so as to realize coal, biomass and its mixture, the steady combustion of catching fire of particularly fire retardant colm, efficient, low NOx, no simultaneously
Slagging scorification and load responding burn soon.
To sum up, for existing coal combustion technology in fire retardant low volatile anthracite, meager coal, coke and the three high coals etc. of burning
During solid fuel inferior, it is impossible to while realizing needing to be equipped with coal mill system in low NOx drainage and high burning efficiency and combustion process
Problem, now needs a kind of combustion method for solving the above problems of offer badly.
Utility model content
The utility model is to solve existing coal combustion technology in colm fuel, it is impossible to while realizing low NOx rows
A kind of problem put and outfit coal mill system is needed in high burning efficiency and combustion process, there is provided colm high efficency low NOx segmentation
Coupling combustion device.
A kind of colm high efficency low NOx segmented couples burner, including N number of fluid bed and a coal-powder boiler, N number of fluidisation
The raw gas efferent duct of bed is connected with the rough coal air burner of coal-powder boiler, and N is the integer more than or equal to 1,
Described fluid bed includes three reaction zones, sequentially consists of emulsion zone, cyclone separation and dilute-phase zone,
Fluidized-bed bottom is provided with conical inner body, and top is provided with shutter, and conical inner body and shutter are respectively positioned on fluid bed
It is interior；
At least one of which fluidisation air current spray nozzle, the broken air current spray nozzle of at least one of which, rotation two are set in fluid bed exterior side wall
Secondary wind jet pipe and feeding device, and described at least one of which fluidisation air current spray nozzle, the broken air current spray nozzle of at least one of which, rotate it is secondary
Wind jet pipe and feeding device are respectively positioned on the emulsion zone of fluid bed,
It is that 10mm particles below is sent in fluid bed that feeding device is used for granularity,
Per layer of broken air current spray nozzle is respectively positioned on the top of fluidisation air current spray nozzle,
Rotation Secondary Air jet pipe is located at the top of broken air current spray nozzle,
Feeding device is located at the top of rotation Secondary Air jet pipe；
The burner hearth of coal-powder boiler is the rectangular or circular straight tube structure in horizontal cross-section,
The bottom of coal-powder boiler is provided with furnace hopper, and the furnace hopper is the rectangular or circular cone cylinder structure in horizontal cross-section,
The rough coal air burner of coal-powder boiler combined by least one raw gas spout and at least one 1 level air-distribution spouts and
Into, and rough coal air burner is located at the bottom of burner hearth；Graduation two wind snout is additionally provided with the side wall of coal-powder boiler, and graduation two wind sprays
Mouth is located at the top of rough coal air burner.
The region that described rough coal air burner is located is reducing atmosphere fuel-rich combustion area, and rough coal air burner is located
The area above in region is oxidizing atmosphere poor fuel burning-out zone.
Fluidisation air current spray nozzle injects the cloth wind mode of fluidized wind：Along the bed bottom surrounding arranged tangential fluidized wind of fluid bed,
And the adjacent two fluidisation air current spray nozzle jet in same layer intersects；
Broken air current spray nozzle injects the cloth wind mode of broken wind：The jet side of all broken air current spray nozzle in same layer
To being the symmetry axis that is perpendicularly oriented to conical inner body, and the jet of the broken air current spray nozzle of relative two in same layer is mutually right
Hit；
The Mach number Ma of the exit flow of fluidisation air current spray nozzle and broken air current spray nozzle is less than or equal to 2.5.
A kind of described colm high efficency low NOx segmented couples burner also includes multiple steam jets, and multiple
Steam jet dips down along the week of dilute-phase zone and is uniformly distributed.
When described emulsion zone is the circular straight tube structure of bottom end seal, the height of emulsion zone is H1, and D1/H1Ratio
Scope is 0.01 to 2；When described dilute-phase zone is the circular straight tube structure of end sealing, the height of dilute-phase zone is H3, and D3/H3
Ratio range be 0.005 to 0.99.
Emulsion zone for bottom end seal straight tube structure, and its horizontal cross-section is rectangular or circle, and dilute-phase zone is end sealing
Straight tube structure, and its horizontal cross-section is rectangular or circle, and cyclone separation is by bottom direct tube section and top conical cylinder section two parts
Constitute, and two-part horizontal cross-section is rectangular or circle.
The maximum of the taper angle theta of described conical inner body is 2 times of particle packing angle, and the height of conical inner body is B, close phase
The height in area is H1, and B≤H1。
A kind of described colm high efficency low NOx segmented couples burner also configures that multiple cloth vanes, and per laminarization
Air current spray nozzle configures an independent cloth vane, and per layer of broken air current spray nozzle configures an independent cloth vane.
The number scope of rotation Secondary Air jet pipe is 2 to 8, and the number scope of steam jet is 4 to 16.
Described feeding device is connected by the Q charge pipe that has a down dip with fluid bed, and Q has a down dip charge pipe along fluid bed
Circumferentially it is uniformly distributed.
Principle analysis：A kind of colm high efficency low NOx segmented couples burner described in the utility model, carries out poor quality
Detailed process during coal combustion is：
Step one：Ignite fluid bed, pressure be less than or equal to 3MPa, temperature range be 500 DEG C to 980 DEG C under the conditions of,
By feeding device send into into fluid bed one kind in the coal of below 10mm, biological particles and limestone particle of granularity or
Various, while injecting fluidized wind by fluidizing air current spray nozzle, broken air current spray nozzle injects broken wind, fluidized wind, broken wind, in
In the presence of heart cone and shutter, one kind to granularity in the coal of below 10mm, biological particles and limestone particle or
It is various that fuel-rich adiabatic combustion and grain sorting under reducing atmosphere is carried out in fluid bed, so as to form raw gas；
Step 2：Raw gas is incorporated in coal-powder boiler by rough coal air burner, in reducing atmosphere fuel-rich combustion
Area injects air and carries out fuel-rich combustion and heat exchange under 1100 DEG C of reducing atmospheres using a level air-distribution spout, then, in oxidation
Property atmosphere poor fuel burning-out zone injects air using graduation two wind snout to be carried out poor fuel after-flame under 1300 DEG C of oxidizing atmospheres, changes
Heat, smoke evacuation and ash discharge slag, so as to the segmented couples for completing coal, biomass and its mixture are burnt.
Using the pointedly segmentation pyrolysis of coal combustion thermochemical study different phase, adiabatic combustion, crush, gasify, going back
The burning of originality atmosphere, oxidizing atmosphere after-flame simultaneously implement what each stage quality, momentum, Energy Efficient were coupled using new construction in stove
Method, fluidized bed combustion and coal-powder boiler burning are combined, and by independent control, break the phase of high effect cleaning coal combustion requirement
Mutually restriction, displays one's respective advantages and overcomes respective inferior position, so as to realize coal, biomass and its mixture, particularly fire retardant simultaneously
Catch fire steady combustion, efficient, low NOx, not slagging scorification and the load responding of colm burn soon.
During concrete application, ignite first fluid bed, to send into fluid bed in granularity below 10mm coals, biomass and
Its mixture, the pyrolysis, burning, the broken, gasification that carry out under certain wind rate for one or more of coal particle particularly inferior, i.e., also
Fuel-rich adiabatic combustion under originality atmosphere, reforms the fuel into as raw gas；Described raw gas is：Exported by fluid bed, pressure
Power be not more than 3MPa, temperature be 500 DEG C to 980 DEG C, only contain the gas-solid two with the controllable semicoke of particle size range, coke granule
Xiang Liu；Then raw gas is incorporated into into coal-powder boiler raw gas burner region by rough coal air burner, this region continue into
Fuel-rich combustion and heat exchange under 1100 DEG C of reducing atmospheres of row, fuel type NOx can be effectively suppressed；Finally in coal-powder boiler rough coal
The area above in air burner region carries out 1300 DEG C or so oxidizing atmosphere after-flames, heat exchange, smoke evacuation and ash discharge using burnout degree
Slag, not only can guarantee that efficiency of combustion but also thermal NO x can be suppressed to generate, fluid bed and coal-powder boiler can realize respective independent control.
The beneficial effect that the utility model brings is, the concept burnt using segmented couples, by each section of independent control and
The efficient coupling of two kinds of type of furnaces, realizes and pointedly strengthens and the thermochemical conversion for suppressing coal in each stage, so as to simultaneously
Realize colm catch fire steady combustion, efficiently, low NOx combustion；Each advantage is simultaneously to have played two kinds of combustion systems of fluid bed and coal-powder boiler
Overcome respective inferior position；
Additionally, fluidized bed configuration Particle Breakage, sorting function, can directly process granularity for 10mm particles below, stream
Change bed without the need for deslagging, not only energy-conservation can cancel the coal mill system that coal-powder boiler burns again, so also without tertiary air process problem；Fluid bed
With dry and desulfurizing function, high ash, Gao Shui, three high coal energy high efficency low NOx coal dust firings of high-sulfur；Fire because fluid bed is adiabatic again
Burn, so the burning of any coal can implement clean combustion using flue gas recirculating technique；Fluid bed has gasification and adjusts
Temperature function, residual coke can be converted into explosive fuel and can be reliable after fire retardant low volatile anthracite, meager coal, pyrolysis or gasification
Realize that high efficency low NOx burns, there is no heating surface wear, coking, efficiency of combustion in the biomass multifuel combustion such as coal and wood chip, rice husk
It is low, the problems such as pollutant emission is high；
Additionally, the both separate control of fluid bed and coal-powder boiler, and efficient coupling, significantly improve the coal of coal-powder boiler
Adaptability and load responding characteristic；Due to having coupled coal-powder boiler, fluidized bed combustion tails over coal dust and can obtain height for what coal measures was united
Effect low NOx combustion；Fluid bed scale and single seriesization can reach the technical merit of coal-powder boiler, on the other hand, due to 1 coal dust
Stove can configure different number fluid beds, be consequently adapted to it is little, in, the coal combustion of big various different scales, including Industrial Boiler, power station
The coal combustion of boiler.Because double whirlpool fast fluidized beds are suitable to coal, biomass and coal and biomass mixture gasification, the utility model
Suitable for Poly-generation.
Theoretical, empirical value experiment and practice have shown that, use certain anthracite, in the case of the ﹪ of oxygen concentration of flue gas 3.2, combustion
More than the ﹪ of efficiency 97 is burnt, up to below 250mg, flameholding, not slagging scorification is burnt, and load responding is good for NOx emission.
Description of the drawings
Fig. 1 is a kind of structural representation of colm high efficency low NOx segmented couples burner described in the utility model；
Fig. 2 is a kind of structural representation of fluid bed；Reference H3Represent the height of dilute-phase zone；
Fig. 3 is the sectional view of tapered cross-section cloth vane；
Fig. 4 is a kind of coal-powder boiler structural representation.
Specific embodiment
Specific embodiment one：Present embodiment is illustrated referring to Fig. 1, Fig. 2 and Fig. 4, it is a kind of bad described in present embodiment
Matter coal high efficency low NOx segmented couples burner, including N number of fluid bed 1 and a coal-powder boiler 2, the raw gas of N number of fluid bed 1
Efferent duct 1-15 is connected with the rough coal air burner 2-4 of coal-powder boiler 2, and N is the integer more than or equal to 1,
Characterized in that, described fluid bed 1 includes three reaction zones, emulsion zone 1-11, whirlwind are sequentially consisted of
Disengagement zone 1-12 and dilute-phase zone 1-13,
The bottom of fluid bed 1 is provided with conical inner body 1-8, and top is provided with shutter 1-14, and conical inner body 1-8 and shutter 1-
14 are respectively positioned in fluid bed 1；
Arrange in the exterior side wall of fluid bed 1 at least one of which fluidisation air current spray nozzle 1-4, the broken air current spray nozzle 1-5 of at least one of which,
Rotation Secondary Air jet pipe 1-6 and feeding device 1-1, and described at least one of which fluidisation air current spray nozzle 1-4, the broken gas of at least one of which
Flow nozzle 1-5, rotation Secondary Air jet pipe 1-6 and feeding device 1-1 are respectively positioned on the emulsion zone 1-11 of fluid bed 1,
It is that 10mm particles below is sent in fluid bed 1 that feeding device 1-1 is used for granularity,
Per layer of broken air current spray nozzle 1-5 is respectively positioned on the top of fluidisation air current spray nozzle 1-4,
Rotation Secondary Air jet pipe 1-6 is located at the top of broken air current spray nozzle 1-5,
Feeding device 1-1 is located at the top of rotation Secondary Air jet pipe 1-6；
The burner hearth 2-1 of coal-powder boiler 2 is the rectangular or circular straight tube structure in horizontal cross-section,
The bottom of coal-powder boiler 2 is provided with furnace hopper 2-7, and the furnace hopper 2-7 is the rectangular or circular cone cylinder in horizontal cross-section
Structure,
The rough coal air burner 2-4 of coal-powder boiler 2 is sprayed by least one raw gas spout 2-5a and at least one 1 level air-distributions
Mouth 2-5b is combined, and rough coal air burner 2-4 is located at the bottom of burner hearth 2-1；Graduation two is additionally provided with the side wall of coal-powder boiler 2
Wind snout 2-6, and graduation two wind snout 2-6 is located at the top of rough coal air burner 2-4.
Present embodiment, described fluid bed 1 is bubbling bed ebullated bed, recirculating fluidized bed, centrifugal fluidized bed, air-flow crushing
Fluid bed, one kind of double whirlpool fast fluidized beds 1 or combinations thereof, it is preferable that fluid bed 1 is double whirlpools fast fluidized bed.
Described coal-powder boiler 2 be tangential firing coal-powder boiler, W flame coal-powder boiler, U flame coal-powder boilers, one kind of cyclone furnace or
Combinations thereof, it is preferable that coal-powder boiler 2 is tangential firing coal-powder boiler.
Fluid bed 1 is used for the reducing atmosphere pyrolysis of below 10mm coals, biological particles and limestone particle, adiabatic combustion
Burn, broken, gasification, grain sorting, desulfurization while, pre- pressing pressure be not more than 3MPa, temperature be 500 DEG C to 980 DEG C, only
Containing the Dual-Phrase Distribution of Gas olid with the controllable semicoke of particle size range, coke granule, i.e. raw gas, the temperature of raw gas is matched somebody with somebody by fluid bed 1
Wind adjust, steam gasification auxiliary control, the semicoke, coke granule granularity in raw gas by reduce the secondary air ratio of fluid bed 1, increase
Air-flow proportional manner broken greatly is adjusted, finally by water vapour tornado rotating separation master control, shutter 1-14 auxiliary controls, really
Semicoke, the particle size range of coke granule protected in raw gas, wherein, shutter 1-14 is realized using prior art.
Coal-powder boiler 2 is used to carry out 1100 DEG C of reducing atmospheres burning of rough coal air burner region and exchanges heat and burn
1300 DEG C of oxidizing atmosphere after-flames of device region area above, heat exchange, smoke evacuation and ash discharge slag, the well-known structures of coal-powder boiler 2
Realized using prior art, relative to fluid bed 1, the burning independent control of coal-powder boiler 2.The burner hearth 2-1 of coal-powder boiler 2 is from bottom to top
It is divided into relatively independent reducing atmosphere fuel-rich combustion area 2-2 and oxidizing atmosphere poor fuel burning-out zone 2-3；
The rough coal air burner 2-4 of described coal-powder boiler 2 is by least one raw gas spout 2-5a and at least one one-level
Combine with wind snout 2-5b, described rough coal air burner 2-4 divides direct current, eddy flow, collection Flame, multiple flammule many
Kind.
The air distribution of fluid bed 1 must assure that reducing atmosphere fuel-rich combustion in bed, and adiabatic combustion, combustion share model
Enclose for 0.2 to 0.8, it is preferable that combustion share scope is 0.2 to 0.5, when fluid bed 1 is double whirlpool fast fluidized beds, due to fuel
Only need partial oxidation, high speed centrifugation fluidisation, double whirlpool fast fluidized beds have that the load responding of recirculating fluidized bed is quick, caloic is exchanged
Strongly, the feature such as time of staying length, cyclonic separation, Matter Transfer, it is therefore not necessary to recirculating fluidized bed material return system, simple structure,
It is compact.
Feeding device 1-1 is high-pressure charging lock hopper, Auger, the mutually defeated powder of high densification, one kind of dilute phase powder feeding or their group
Close, to adapt to no more than 3MPa pressure under operate；The solid material that feeding device 1-1 is provided is, coal of the granularity less than 10mm,
Biomass, coke, semicoke, one or more of limestone particle；Limestone particle also can separately set device and spout is sprayed into.
Fluidisation air current spray nozzle 1-4 injects fluidized wind and broken air current spray nozzle 1-5 inject broken wind be air, water vapour,
One or more in flue gas recycled, inert gas, it is preferable that for air.
One level air-distribution spout 2-5b and graduation two wind snout 2-6 are used to convey oxidant, it is preferable that for air.
Specific embodiment two：Present embodiment, present embodiment and specific embodiment party are illustrated referring to Fig. 1, Fig. 2 and Fig. 4
A kind of difference of the colm high efficency low NOx segmented couples burner described in formula one is, described rough coal air burner 2-4
The region at place is reducing atmosphere fuel-rich combustion area 2-2, and the area above of rough coal air burner 2-4 regions is oxidation
Property atmosphere poor fuel burning-out zone 2-3.
In present embodiment, the raw gas outlet 1-15 of the raw gas spout 2-5a of coal-powder boiler 2 and described fluid bed 1
Connection, rough coal air burner 2-4 need to configure multigroup, it is preferable that rough coal air burner 2-4 configures 4 groups.
4 groups of rough coal air burner 2-4 circle types are arranged in reducing atmosphere fuel-rich combustion area 2-2, for raw gas
1100 DEG C of reducing atmosphere fuel-rich combustions, make efficiency of carbon con version reach more than 80%, fuel bound nitrogen and are converted into volatile matter using high temperature
Nitrogen reaches more than 80%, and not only improving next section of after-flame can effectively suppress the generation of fuel type NOx, the level air-distribution of coal-powder boiler 2 one again
It is divided into rough coal air burner 2-4 centre winds, surrounding air and side wind beneficial to the cooling of rough coal air burner 2-4 and prevents reproducibility
The area 2-2 wall-cooling surfaces slagging scorification of atmosphere fuel-rich combustion and high temperature corrosion.
The graduation two wind snout 2-6 of coal-powder boiler 2 need to configure multigroup, it is preferable that the graduation two wind snout 2-6 of coal-powder boiler 2 configurations 4
Group；4 groups of graduation two wind snout 2-6 circle types of coal-powder boiler 2 are arranged in oxidizing atmosphere poor fuel burning-out zone 2-3, for reproducibility
1300 DEG C of oxidizing atmosphere lean combustions of combustible (mainly CO and a small amount of semicoke, coke) that atmosphere fuel-rich combustion area 2-2 is produced
Expect after-flame, can prevent thermal NO x from producing again energy fully after-flame, the graduation two wind of coal-powder boiler 2 is divided into fiery windward (OFA), master two
Level air-distribution, burnout degree, are sequentially arranged from bottom to top in oxidizing atmosphere poor fuel burning-out zone 2-3.
Because raw gas burns in coal-powder boiler 2 from overall angle independent body, can the various wind rates of independent optimization, preferably
Ground, it is 0.4 to 0.1 that a level air-distribution wind rate scope of coal-powder boiler 2 is the graduation two wind wind rate scope of 0.6 to 0.9, coal-powder boiler 2.Stream
Change bed 1 and the respective independent control of coal-powder boiler 2；Fluid bed 1 need to configure multiple, it is preferable that for 1 to 8, to match different scales
Coal-powder boiler 2 multigroup rough coal air burner 2-4.
Specific embodiment three：Present embodiment, present embodiment and specific embodiment party are illustrated referring to Fig. 1, Fig. 2 and Fig. 4
A kind of difference of the colm high efficency low NOx segmented couples burner described in formula one is,
Fluidisation air current spray nozzle 1-4 injects the cloth wind mode of fluidized wind：Along the bed bottom surrounding arranged tangential fluidisation of fluid bed 1
Adjacent two fluidisation air current spray nozzle 1-4 jets in wind, and same layer intersect；
Broken air current spray nozzle 1-5 injects the cloth wind mode of broken wind：All broken air current spray nozzle 1-5's in same layer
Jet direction is the symmetry axis for being perpendicularly oriented to conical inner body 1-8, and the broken air current spray nozzle 1-5 of relative two in same layer
Jet mutually clash；
The Mach number Ma of the exit flow of fluidisation air current spray nozzle 1-4 and broken air current spray nozzle 1-5 is less than or equal to 2.5.
In present embodiment, after the adjacent nozzle jet of multiple fluidisation air current spray nozzle 1-4 of same level intersects,
Broken circle can be formed in bed to implement coal particle shearing-crushing, same level adjacent nozzle jet intersects formed obtuse angle
Between 91 ° to 179 °, preferably 135 °, the Mach number Ma for fluidizing air current spray nozzle 1-4 exit flows is not more than 2.5, Supersonic
Speed is lower to be preferably 1.35 to 2.01；
So, a kind of one of cloth wind feature of fluid bed 1 described in the utility model is：In bed bottom, surrounding at least two-layer is cut
Intersect to arrangement fluidized wind, same level adjacent nozzle jet.
The broken air current spray nozzle 1-5 of described fluid bed 1 can be multiple Laval-cavity nozzles or negative throat noz(zle), divide one layer or many
Layer arrangement, is divided to in-line, two kinds of arrangements of stagger arrangement between each layer in the case of multilayer, and per layer of group has independent cloth vane 1-3
Control with Load Regulation so that Zhixieli granules are broken；The multiple broken air current spray nozzle 1-5 of same level is in the symmetrical axle center pair of fluid bed 1
Punching arrangement, the Mach number Ma of broken air current spray nozzle 1-5 exit flows is not more than 2.5, and 1.35 to 2.01 are preferably under supersonic speed；
So, the two of the cloth wind feature of fluid bed described in the utility model 1 is：Fluidized bed combustion area 1-11a tops surrounding
At least two groups of two-layer or at least one of which liquidate and arrange that broken wind, same level clash with respect to two injection streams.
Specific embodiment four：Present embodiment, present embodiment and specific embodiment party are illustrated referring to Fig. 1, Fig. 2 and Fig. 4
A kind of difference of the colm high efficency low NOx segmented couples burner described in formula one is that a kind of described colm is efficient
Low NOx segmented couples burner also includes multiple steam jets 1-7, and multiple steam jets 1-7 are along dilute-phase zone 1-13
Dip down in week and be uniformly distributed.
Present embodiment, the rotation Secondary Air jet pipe 1-6 of described fluid bed 1 is multiple, it is preferable that for 2 to 8,
Broken gasification zone 1-11b tops are arranged in, in same level, the circumferential uniform circle type arrangement of at least one of which, for gas-solid
Two phase flow rotates；The Secondary Air introduced by rotation Secondary Air jet pipe 1-6 is air, water vapour, flue gas recycled, inert gas
One or more, it is preferable that for air；
So, the three of the cloth wind feature of fluid bed described in the utility model 1 is：In broken gasification zone top in same water
The circumferential uniform circle type arrangement rotation Secondary Air of at least one of which is so that Dual-Phrase Distribution of Gas olid rotation in plane.
Specific embodiment five：Present embodiment, present embodiment and specific embodiment party are illustrated referring to Fig. 1, Fig. 2 and Fig. 4
A kind of difference of the colm high efficency low NOx segmented couples burner described in formula one is that described emulsion zone 1-11 is bottom
During the circular straight tube structure of end sealing, the height of emulsion zone 1-11 is H1, and D1/H1Ratio range be 0.01 to 2；Described
When dilute-phase zone 1-13 is the circular straight tube structure of end sealing, the height of dilute-phase zone 1-13 is H3, and D3/H3Ratio range be
0.005 to 0.99.
Fluidization gas-particle two-phase in present embodiment, after cyclone separation 1-12 accelerates, rotates, centrifugal force is sorted
Stream is entered after dilute-phase zone, is continued to be pyrolyzed, is gasified, and rotation constantly weakens and fully develops, due to centrifugal force and gas-solid sliding, dilute
Phase region is formed based on semicoke, the outer whirlpool of coke granule, the effect of dilute-phase zone 1-13 be fast transport, auxiliary coal particle,
Semicoke, coke granule pyrolysis, gasification, sorting, the prolongation time of staying.
Specific embodiment six：Present embodiment, present embodiment and specific embodiment party are illustrated referring to Fig. 1, Fig. 2 and Fig. 4
A kind of difference of the colm high efficency low NOx segmented couples burner described in formula one is that emulsion zone 1-11 is bottom end seal
Straight tube structure, and its horizontal cross-section is rectangular or circle, dilute-phase zone 1-13 for end sealing straight tube structure, and its level cuts
Face is rectangular or circle, and cyclone separation 1-12 is made up of bottom direct tube section and top conical cylinder section two parts, and two-part water
Plane section is rectangular or circle.
In present embodiment, cyclone separation 1-12, preferably, the tapered taper cone barrel in top, bottom circle straight tube structure, and
The upper port of cyclone separation 1-12 is identical with the lower port of dilute-phase zone 1-13, the lower port and emulsion zone of cyclone separation 1-12
The upper port of 1-11 is identical.
The height of cyclone separation 1-12 bottoms circle direct tube section is H2a, a diameter of D1, the height of top conical cylinder section is H2b、
Bottom diameter is D1, top end diameter be D3, the height H of cyclone separation 1-122With its underpart direct tube section height H2aRatio range is
2 to 10；
Described emulsion zone 1-11, preferably, the circular straight tube structure of bottom end seal, is highly H1, and D1/H1Ratio
Scope is 0.01 to 2.
Present embodiment, by bed bottom emulsion zone 1-11 surroundings tangential cloth wind, jet liquidates, Secondary Air rotates, coordinate
The water conservancy diversion of heart cone 1-8 and broken target are acted on, and make coal particle be fully rotatable fluidisation, adiabatic combustion, broken, gas in emulsion zone 1-11
Change, transmit, circulate, form the interior whirlpool of emulsion zone 1-11；Central part particle flow is revolved due to gravity along conical inner body 1-8 surfaces
Turn to move down, with moving bed feature, can significantly extend the coal particle time of staying, surrounding particle flow has centrifugal fluidized bed special
Levy, can also extend the coal particle time of staying；Rotary fluid eliminates layered fluidized, reunion, bubble；Because jet intersects and target
Wall clashes into, liquidates with crushing function, and described emulsion zone 1-11 does not need direct deslagging；Emulsion zone 1-11 can ensure coal particle
Fluidisation, pyrolysis are fully rotatable, adiabatic combustion, are crushed, gasified, transmitting, circulating, extend the time of staying, avoid direct deslagging.
Specific embodiment seven：Present embodiment, present embodiment and specific embodiment party are illustrated referring to Fig. 1, Fig. 2 and Fig. 4
A kind of difference of the colm high efficency low NOx segmented couples burner described in formula one is, the cone of described conical inner body 1-8
The maximum of angle θ is 2 times of particle packing angle, and the height of conical inner body 1-8 is B, and the height of emulsion zone 1-11 is H1, and B≤
H1。
Present embodiment, conical inner body 1-8 can be fluidized, crushed as guiding device and broken target auxiliary coal particle.
Specific embodiment eight：Present embodiment, present embodiment and specific embodiment one are illustrated referring to Fig. 1 to Fig. 4
A kind of difference of described colm high efficency low NOx segmented couples burner is, a kind of described colm high efficency low NOx
Segmented couples burner also configures that multiple cloth vane 1-3, and configures an independent cloth vane per laminarization air current spray nozzle 1-4
1-3, per layer of broken air current spray nozzle 1-5 configures an independent cloth vane 1-3.
Present embodiment, cloth vane 1-3 is existing structure, and the section of cloth vane 1-3 is the circle of circular, rectangle or taper
Ring, is furnished with air inlet pipe 1-3a, escaping pipe 1-3b, and escaping pipe 1-3b is connected with fluidisation air current spray nozzle 1-4, referring specifically to Fig. 3；It is described
A cloth vane 1-3 parts be configured in the bottom of fluid bed 1, i.e.,：Fluidized bed combustion area 1-11a, another part is configured in fluid bed 1
Fluidized bed combustion area 1-11a tops；In order to ensure stabilization fluid and Load Regulation are controlled, at least match somebody with somebody in the described bottom of fluid bed 1
Two layers of cloth vane 1-3 is put, gasification zone 1-11b is crushed in described fluid bed 1 and is at least configured two-layer or one layer of two groups of cloth vane 1-
3；The gas for splitting into fluidisation air-flow and broken air-flow after cloth vane 1-3 fluidized winds and broken wind respectively is introduced by air inlet pipe 1-3a
For air, water vapour, flue gas recycled, one or more of inert gas, it is preferable that for air.
The fluidisation air current spray nozzle 1-4 of described fluid bed 1 is multiple Laval-cavity nozzles or negative throat noz(zle), divides one or more layers
Arrangement, is divided to in-line, two kinds of arrangements of stagger arrangement between each layer in the case of multilayer, and per layer has independent cloth vane 1-3 with profit
Particle Breakage and Load Regulation are controlled.
Specific embodiment nine：Present embodiment, present embodiment and specific embodiment party are illustrated referring to Fig. 1, Fig. 2 and Fig. 4
A kind of difference of the colm high efficency low NOx segmented couples burner described in formula one is that rotation Secondary Air jet pipe 1-6's is individual
Number scope is 2 to 8, and the number scope of steam jet 1-7 is 4 to 16.
Present embodiment, the rotation Secondary Air jet pipe 1-6 of described fluid bed 1 is multiple, it is preferable that for 2 to 8,
Broken gasification zone 1-11b tops are arranged in, in same level, the circumferential uniform circle type arrangement of at least one of which, for gas-solid
Two phase flow rotates；The Secondary Air introduced by rotation Secondary Air jet pipe 1-6 is air, water vapour, flue gas recycled, inert gas
One or more, it is preferable that for air.
Specific embodiment ten：Present embodiment, present embodiment and specific embodiment party are illustrated referring to Fig. 1, Fig. 2 and Fig. 4
A kind of difference of the colm high efficency low NOx segmented couples burner described in formula one is that described feeding device 1-1 passes through
The Q charge pipe 1-2 that has a down dip is connected with fluid bed 1, and the Q charge pipe 1-2 that has a down dip is uniformly distributed along the circumference of fluid bed 1.
Present embodiment, the configuration of charge pipe 1-2 is divided to two kinds：Centralized system and hierarchical approaches, centralized system is, in close phase
Area 1-11 is separately provided at least one and has a down dip charge pipe 1-2；Hierarchical approaches are, in emulsion zone 1-11 and dilute-phase zone 1-13 respectively
Arrange at least one to have a down dip charge pipe 1-2, implement stock grading.
Emulsion zone 1-11 is divided into three parts again, respectively：Fluidisation combustion corresponding to one or more layers fluidisation air current spray nozzle 1-4
Burn broken gasification zone 1-11b, the rotation Secondary Air jet pipe 1-6 corresponding to area 1-11a, one or more layers broken air current spray nozzle 1-5
With the transmission race way having a down dip corresponding to charge pipe 1-2.
Specific embodiment 11：Present embodiment and a kind of colm high efficency low NOx described in specific embodiment one
The difference of segmented couples burner is that shutter 1-14 is one-level straight panel or bent plate cylindrical shape shutter, by multiple rectangular
Body straight panel or bent plate mutually do not cover into 15 ° to 35 ° acute angles with down-flowing incoming direction and combine, and the cylindrical shape shutter is with intracardiac
It is placed in dilute-phase zone 1-13 tops；Shutter 1-14 effects are the grain graininess in auxiliary control raw gas.
Claims (10)
1. a kind of colm high efficency low NOx segmented couples burner, including N number of fluid bed (1) and a coal-powder boiler (2) are N number of
The raw gas efferent duct (1-15) of fluid bed (1) is connected with the rough coal air burner (2-4) of coal-powder boiler (2), N be more than or wait
In 1 integer,
Characterized in that, described fluid bed (1) sequentially consists of emulsion zone (1-11), whirlwind including three reaction zones
Disengagement zone (1-12) and dilute-phase zone (1-13),
Fluid bed (1) bottom is provided with conical inner body (1-8), and top is provided with shutter (1-14), and conical inner body (1-8) and blinds
Window (1-14) is respectively positioned in fluid bed (1)；
At least one of which fluidisation air current spray nozzle (1-4), at least one of which broken air current spray nozzle (1- is set in fluid bed (1) exterior side wall
5), Secondary Air jet pipe (1-6) and feeding device (1-1) is rotated, and described at least one of which fluidizes air current spray nozzle (1-4), at least
One layer of broken air current spray nozzle (1-5), rotation Secondary Air jet pipe (1-6) and feeding device (1-1) are respectively positioned on the close phase of fluid bed (1)
Area (1-11),
It is that 10mm particles below is sent in fluid bed (1) that feeding device (1-1) is used for granularity,
Per layer of broken air current spray nozzle (1-5) is respectively positioned on the top of fluidisation air current spray nozzle (1-4),
Rotation Secondary Air jet pipe (1-6) is located at the top of broken air current spray nozzle (1-5),
Feeding device (1-1) is located at the top of rotation Secondary Air jet pipe (1-6)；
The burner hearth (2-1) of coal-powder boiler (2) is the rectangular or circular straight tube structure in horizontal cross-section,
The bottom of coal-powder boiler (2) is provided with furnace hopper (2-7), and the furnace hopper (2-7) is the rectangular or circular cone in horizontal cross-section
Barrel structure,
The rough coal air burner (2-4) of coal-powder boiler (2) is by least one raw gas spout (2-5a) and at least one 1 level air-distributions
Spout (2-5b) is combined, and rough coal air burner (2-4) is located at the bottom of burner hearth (2-1)；On the side wall of coal-powder boiler (2) also
Graduation two wind snout (2-6) is provided with, and graduation two wind snout (2-6) is located at the top of rough coal air burner (2-4).
2. a kind of colm high efficency low NOx segmented couples burner according to claim 1, it is characterised in that described
Rough coal air burner (2-4) be located region be reducing atmosphere fuel-rich combustion area (2-2), rough coal air burner (2-4)
The area above of region is oxidizing atmosphere poor fuel burning-out zone (2-3).
3. a kind of colm high efficency low NOx segmented couples burner according to claim 1, it is characterised in that
Fluidisation air current spray nozzle (1-4) injects the cloth wind mode of fluidized wind：Along the bed bottom surrounding arranged tangential fluidisation of fluid bed (1)
Adjacent two fluidisation air current spray nozzle (1-4) jet in wind, and same layer intersects；
Broken air current spray nozzle (1-5) injects the cloth wind mode of broken wind：All broken air current spray nozzle (1-5) in same layer
Jet direction is the symmetry axis for being perpendicularly oriented to conical inner body (1-8), and the broken air current spray nozzle of relative two in same layer
(1-5) jet mutually clashes；
The Mach number Ma of the exit flow of fluidisation air current spray nozzle (1-4) and broken air current spray nozzle (1-5) is less than or equal to 2.5.
4. a kind of colm high efficency low NOx segmented couples burner according to claim 1, it is characterised in that described
A kind of colm high efficency low NOx segmented couples burner also include multiple steam jets (1-7), and multiple vapor spray
Mouth (1-7) is uniformly distributed along dipping down in week for dilute-phase zone (1-13).
5. a kind of colm high efficency low NOx segmented couples burner according to claim 1, it is characterised in that described
Emulsion zone (1-11) for bottom end seal circular straight tube structure when, the height of emulsion zone (1-11) is H1, and D1/H1Ratio
Scope is 0.01 to 2；When described dilute-phase zone (1-13) is the circular straight tube structure of end sealing, the height of dilute-phase zone (1-13)
For H3, and D3/H3Ratio range be 0.005 to 0.99.
6. a kind of colm high efficency low NOx segmented couples burner according to claim 1, it is characterised in that close phase
Area (1-11) for bottom end seal straight tube structure, and its horizontal cross-section is rectangular or circle, and dilute-phase zone (1-13) is end sealing
Straight tube structure, and its horizontal cross-section is rectangular or circle, and cyclone separation (1-12) is by bottom direct tube section and top conical cylinder section
Two parts are constituted, and two-part horizontal cross-section is rectangular or circle.
7. a kind of colm high efficency low NOx segmented couples burner according to claim 6, it is characterised in that described
The maximum of taper angle theta of conical inner body (1-8) be 2 times of particle packing angle, the height of conical inner body (1-8) is B, emulsion zone
(1-11) height is H1, and B≤H1。
8. a kind of colm high efficency low NOx segmented couples burner according to claim 1, it is characterised in that described
A kind of colm high efficency low NOx segmented couples burner also configure that multiple cloth vanes (1-3), and per laminarization air current spray nozzle
(1-4) an independent cloth vane (1-3) is configured, per layer of broken air current spray nozzle (1-5) configures an independent cloth vane (1-
3)。
9. a kind of colm high efficency low NOx segmented couples burner according to claim 1, it is characterised in that rotation
The number scope of Secondary Air jet pipe (1-6) is 2 to 8, and the number scope of steam jet (1-7) is 4 to 16.
10. a kind of colm high efficency low NOx segmented couples burner according to claim 1, it is characterised in that described
Feeding device (1-1) connect with fluid bed (1) by the Q charge pipes (1-2) that have a down dip, and Q charge pipe (1-2) edge that has a down dip is flowed
The circumference for changing bed (1) is uniformly distributed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621252624.3U CN206160102U (en) | 2016-11-22 | 2016-11-22 | High -efficient low NOx segmentation coupling burner of colm |
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|---|---|---|---|
| CN201621252624.3U CN206160102U (en) | 2016-11-22 | 2016-11-22 | High -efficient low NOx segmentation coupling burner of colm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550771A (en) * | 2020-04-30 | 2020-08-18 | 华中科技大学 | Supercritical CO of uniform thermal load2Circular and elliptical tangential boiler body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550771A (en) * | 2020-04-30 | 2020-08-18 | 华中科技大学 | Supercritical CO of uniform thermal load2Circular and elliptical tangential boiler body |
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