CN107763663A - Solid fuel combustion apparatus and its application method - Google Patents
Solid fuel combustion apparatus and its application method Download PDFInfo
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- CN107763663A CN107763663A CN201610702621.3A CN201610702621A CN107763663A CN 107763663 A CN107763663 A CN 107763663A CN 201610702621 A CN201610702621 A CN 201610702621A CN 107763663 A CN107763663 A CN 107763663A
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- gas
- oxygen
- atomization
- solid fuel
- inner tube
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q13/00—Igniters not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a kind of solid fuel combustion apparatus and its application method, the inner tube of the present apparatus, intervalve, outer tube fit successively, atomization gas passage is formed between inner tube and intervalve, atomization gas input pipe is located at middle tube wall, it is atomized the leading section that gas blowout head is located at atomization gas passage, bluff body is located at the spout end of inner tube, oxygen-enriched air or pure oxygen passage are formed between intervalve and outer tube, outer tube stretches into the through hole of burner block, atomization cavity is formed between outer tube end face and the operative end surface of burner block, oxygen-enriched air or pure oxygen inlet pipe are located at outer tube wall.This method fluidized solids fuel is sprayed by inner tube spout end, and atomization gas is sprayed by atomization gas blowout head, and oxygen-enriched air or pure oxygen enter atomization cavity and be mutually sufficiently mixed with atomization gas medium and fluidized solids fuel, and stable flame is formed after igniting.The present apparatus and method are realized to solid fuel a little fight forming stable flame in normal temperature environment, effectively improves the use range of solid fuel.
Description
Technical field
The present invention relates to a kind of solid fuel combustion apparatus and its application method.
Background technology
Thermal-flame kiln is widely used in the industries such as glass, non-ferrous metal metallurgy, boiler, petrochemical industry, thermal-flame kiln
Using gaseous fuels such as various natural gases, coal gas, liquefied petroleum gas, mixed gases, various heavy oil, biodiesel, coal tar
Deng the solid fuel such as liquid fuel and all kinds of coals, biomass, petroleum coke.Various gases, liquid or solid fuel combustion are not only
Substantial amounts of pollutant is produced, and the cost of fuel combustion also turns into the heavy burden of enterprise.Seek low stain, cheap
The burning solution of alternative fuel and correlation is to reduce cost, reduce the important measures of pollution.Coal reserves enriches, and price is low
It is honest and clean, will be main primary energy source in foreseeable future；Biomass fuel have green, reproducing characteristic, by regarding
For green energy resource；As the petroleum coke of petroleum industry delayed coking byproduct, there is calorific value height, low-cost feature, in many
Industry is as a kind of alternative fuel.
Chinese patent CN204574021U discloses a kind of spray gun of fluidized solids fuel, and fluidized solids can be fired
Stream carries out air-coal separating, and is atomized using atomizing medium, and certain length and the fuel of shape are injected into burner hearth
Stream.But the patent does not include the oxidant needed for fuel completely burned, it is impossible to the burning of fuel cmpletely is supported, and it is necessary
In actual use, corresponding oxidant is injected by other devices on burner hearth（Air and/or oxygen-enriched air, oxygen
Deng）, therefore the spray gun can not be used alone, and the igniting of solid fuel and stable combustion can not be carried out under the environment temperature of normal temperature
Burn.
Chinese patent CN201555217U discloses a kind of petroleum coke powder solid fuel burner special, and the burner is with air
Mixed for atomization gas and with fluidisation state petroleum coke powder in pipette tips, spray into stove and burnt with air.The burner does not have
Selection examination is carried out to atomization gas, also without studying various atomization gas to potential impact caused by solid fuel ignition, and it is right
The influence of product quality and follow-up vent gas treatment；Simultaneously as solid fuel is difficult to burn and controlled, caused pollute of burning
Greatly, product quality can be had undesirable effect.Solid fuel in actual use be present and be difficult in the burner that the patent discloses
The defects of fire, flame black area are grown, and solid fuel ignition is insufficient, and product quality is had an impact.
Chinese patent CN203052700U discloses a kind of aeration device of few oil or non-oil ignition, by plasma generator
The plasma of high temperature is produced, and sprays into oxygen and is lighted a fire with secondary solid fuel or low-load combustion-stabilizing.Using high temperature etc. from
Daughter is lighted a fire and steady combustion not only makes integral device one-time investment high, and maintenance is big in use, is not suitable for frequent start and stop
The stove of the periodic job of stove.In the industries such as metallurgy, non-ferrous metal, chemical industry, the substantial amounts of work that frequently igniting starts be present
Industry kiln, because firing temperature is low, solid fuel is difficult to light a fire and stable burning；Meanwhile burn-off rate is low, the combustion of uncombusted solid
Material can pollute to heated material, and flue gas middle particle concentration is big.These reasons cause the use range of solid fuel by
Limitation.
Various solid fuel firing temperatures are high, and stable burning of a little fighting is difficult under normal temperature environment.Conventional solid fuel
Kiln temperature is baked at least more than 800 degree or so using substantial amounts of fuel oil or gaseous fuel, just sprays into solid fuel.Kiln
The black furnace of stove starts the fuel for not only consuming a large amount of high values, while limits the use range of solid fuel.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of solid fuel combustion apparatus and its application method, the present apparatus
Realization is lighted a fire in normal temperature environment to solid fuel, and forms stable flame, and this method is situated between using gaseous fuel as atomization
Matter, the solid fuel flame that formation can be lighted a fire with normal temperature on the outside of kiln precombustion chamber and hot working face, stabilization is burnt, is effectively carried
The use range of high solid fuel.
In order to solve the above technical problems, solid fuel combustion apparatus of the present invention includes burner block, inner tube, intervalve, atomization
Gas input pipe, atomization gas blowout head and bluff body, the burner block open up through hole, said inner tube coaxial sleeve together in the intervalve,
Atomization gas passage is formed between said inner tube and intervalve, the atomization gas channel end is sealed using shrouding, the atomization gas
Input pipe is located at the middle tube wall and connects the atomization gas passage, and the atomization gas blowout head is annular and is located at institute
The leading section of atomization gas passage is stated, the bluff body is located at the spout end of said inner tube and positioned at the axis of inner tube, the present apparatus
Also include outer tube, oxygen-enriched air or pure oxygen inlet pipe, the intervalve coaxial sleeve is together in the outer tube and stretching out outer tube, institute
State formation oxygen-enriched air or pure oxygen passage between intervalve and the outer tube and end is sealed using shrouding, the outer tube stretches into
The through hole and outer tunnel end reduction of area of the burner block enter the working end of the operative end surface of burner block, the outer tube end face and burner block
Atomization cavity is formed between face, oxygen-enriched air or the pure oxygen inlet pipe is located at the outer tube wall and connects the oxygen-enriched sky
Gas or pure oxygen passage.
Further, the ring section of the atomization gas blowout head is provided with annular jet, spaced apart through hole spout or interval
The U-lag spout of arrangement, the through hole spout include ladder circular hole and/or isometrical circular hole, the ladder circular hole and/or isometrical circle
Hole arranged for interval, the ladder circular hole and isometrical circular hole press 1~3 on the ring section of the atomization gas blowout head:1 interval cloth
Put, the U-lag of the U-lag spout is located at the outer ring of the atomization gas blowout head.
Further, the ratio of the diameter macropores of the ladder circular hole and hole diameter is 1.01~100, the ladder circular hole
The ratio of hole diameter and the isometrical Circularhole diameter be 0.1~10.
Further, the through hole spout of the atomization gas blowout head or U-lag spout are at least one.
Further, the through hole spout of the atomization gas blowout head tilts 60 °~-60 ° angles on the basis of axis.
Further, the spout end of said inner tube is equal coupling mouth, contraction mouth, extension mouth, rectangular opening or oval mouth.
Further, the leading section of the atomization gas passage flushed with the spout end of said inner tube, the atomization gas passage
Leading section protrude from the spout end of said inner tube or the leading section of the atomization gas passage and be located at the spout end of said inner tube
On rear side of portion.
Further, the bluff body flushes with the spout end of said inner tube, the bluff body protrudes from the spout of said inner tube
End or the bluff body are located on rear side of the spout end of said inner tube, the bluff body be shaped as taper, taper with cylindrical group
Close or taper is combined with cylinder, truncated cone-shaped, the cylindrical bottom chamfer that the taper is combined with cylinder.
Further, the taper is interval with arc in the cylindrical periphery with the bluff body that cylinder combines along axis
Connected in star.
Further, the length of the atomization cavity is between the spout end diameter of 0.01 to 100 times of inner tube, the atomization
Cavity is shaped as isometrical cylinder, circular cone necking shape or circular cone extension shape.
A kind of application method of above-mentioned solid fuel combustion apparatus, fluidized solids fuel are sprayed into inner tube by spout end
Going out, atomization gas is entered after the atomization gas passage between inner tube and intervalve by atomization gas input pipe to be sprayed through being atomized gas blowout head,
Oxygen-enriched air or pure oxygen enter atomization cavity and with being atomized gas medium and fluidised form through inlet tube and oxygen-enriched air or pure oxygen passage
Change solid fuel to be mutually sufficiently mixed, after preliminary igniting precombustion chamber formed it is stable, not by external interference with fluidization
Stable flame based on solid fuel.
Further, the atomization gas includes coke-stove gas, liquefied natural gas, propane, coal gas of converter or coal gas, or above-mentioned
The mixed gaseous fuel of fuel gas.
Further, when that need not carry out normal temperature igniting, the atomization gas includes air, the oxygen-enriched sky of various oxygen concentrations
Gas, pure oxygen or vapor.
Further, the flow velocity of the atomization gas be 0~300m/s, temperature be normal temperature or preheating temperature.
Further, the fluidized solids fuel includes coal dust, petroleum coke powder or biomass granule fuel, and with strength
Liquid flash calciner is to inner tube inlet.
Further, the gas medium of the strength liquid flash calciner is air, nitrogen, the oxygen-enriched sky of various oxygen concentrations
Gas, CO2, caused tail gas, pure oxygen and CO after various gas-solid liquid fuel combustions2The oxygen that tail gas after burning mixes is dense
The gas or composition spent 5~100% include O2/CO2/N2The mixed gas of composition.
Further, the gas medium temperature of the strength liquid flash calciner is -10 DEG C~1300 DEG C, the fluidized solids
Fuel is in the concentrated phase fluidised form or dilute phase fluidised form of strength liquid flash calciner, the matter of pure solid fuel and liquid flash calciner gas medium
Ratio is measured in the range of 600 to 0.1, the flow velocity of fluidized solids fuel is between 2~300m/s.
Because solid fuel combustion apparatus of the present invention and its application method employ above-mentioned technical proposal, i.e., the inner tube of the present apparatus,
Intervalve, outer tube fit successively, atomization gas passage is formed between inner tube and intervalve and end is defeated using shrouding sealing, atomization gas
Enter pipe located at middle tube wall and connect atomization gas passage, atomization gas blowout head is located at the leading section of atomization gas passage, and bluff body is located at
The spout end of inner tube, form oxygen-enriched air between intervalve and outer tube or pure oxygen passage, outer tube stretch into the through hole of burner block, outside
Form atomization cavity between end surfaces and the operative end surface of burner block, oxygen-enriched air or pure oxygen inlet pipe located at outer tube wall and
Connect oxygen-enriched air or pure oxygen passage.This method fluidized solids fuel is sprayed into inner tube by spout end, and atomization gas passes through
Atomization gas input pipe sprays after entering atomization gas passage through being atomized gas blowout head, and oxygen-enriched air or pure oxygen enter atomizing space through inlet tube
Chamber and mutually it is sufficiently mixed with atomization gas medium and fluidized solids fuel, stabilization is formed in precombustion chamber after preliminary igniting
, not by the stable flame based on fluidized solids fuel of external interference.The present apparatus is realized fires in normal temperature environment to solid
Material is lighted a fire, and forms stable flame, this method using gaseous fuel as atomizing medium combination oxygen-enriched air or pure oxygen,
The solid fuel flame that formation can be lighted a fire with normal temperature on the outside of kiln precombustion chamber and hot working face, stabilization is burnt, effectively improve solid
The use range of fluid fuel.
Brief description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is the structural representation of solid fuel combustion apparatus of the present invention；
Fig. 2 is that the schematic diagram that gas blowout head is provided with annular jet is atomized in the present apparatus；
Fig. 3 is that the schematic diagram that gas blowout head is provided with through hole spout is atomized in the present apparatus；
Fig. 4 is that the schematic diagram that gas blowout head is provided with U-lag spout is atomized in the present apparatus；
Fig. 5 is the ladder circular hole and the spaced apart schematic diagram of isometrical circular hole that gas blowout head is atomized in the present apparatus；
Fig. 6 is the spaced apart schematic diagram of isometrical circular hole that gas blowout head is atomized in the present apparatus；
Fig. 7 is the ladder circular hole that gas blowout head is atomized in the present apparatus and isometrical circular hole arranged for interval diagrammatic cross-section；
Fig. 8 is to be atomized the isometrical circular hole of gas blowout head one in the present apparatus to arrange schematic diagram；
Fig. 9 is that the schematic diagram that the through hole spout of gas blowout head is obliquely installed is atomized in this spray gun；
Figure 10 is Fig. 9 diagrammatic cross-section；
Figure 11 is that the spout end of inner tube in the present apparatus is the schematic diagram of equal coupling mouth；
Figure 12 is that the spout end of inner tube in the present apparatus is the schematic diagram of contraction mouth；
Figure 13 is that the spout end of inner tube in the present apparatus is the schematic diagram for extending mouth；
Figure 14 is that the spout end of inner tube in the present apparatus is the schematic diagram of rectangular opening；
Figure 15 is that the spout end of inner tube in the present apparatus is the schematic diagram of oval mouth；
Figure 16 is the schematic diagram that bluff body flushes with the spout end of inner tube in the present apparatus；
Figure 17 is the schematic diagram of the spout end that bluff body is retracted inner tube in the present apparatus；
Figure 18 is the schematic diagram of the spout end that bluff body protrudes inner tube in the present apparatus；
Figure 19 is the schematic diagram that bluff body is shaped as taper in the present apparatus；
Figure 20 is that bluff body is shaped as the schematic diagram that taper is combined with cylinder in the present apparatus；
Figure 21 is that bluff body is shaped as the schematic diagram that taper is combined with cylinder, truncated cone-shaped in the present apparatus；
Figure 22 is the schematic diagram that the bluff body surface that taper is combined with cylinder in the present apparatus is provided with arc groove；
Figure 23 is Figure 22 diagrammatic cross-section.
Embodiment
Embodiment is as shown in figure 1, solid fuel combustion apparatus of the present invention includes burner block 12, inner tube 1, intervalve 2, atomization
Gas input pipe 3, atomization gas blowout head 6 and bluff body 7, the burner block 12 open up through hole, and the coaxial sleeve of said inner tube 1 is together in the centre
In pipe 2, atomization gas passage 4 is formed between said inner tube 1 and intervalve 2, the end of atomization gas passage 4 is sealed using shrouding 5,
The atomization gas input pipe 3 is located at the tube wall of intervalve 2 and connects the atomization gas passage 4, and the atomization gas blowout head 6 is
Annular and the leading section for being located at the atomization gas passage 4, the bluff body 7 is located at the spout end of said inner tube 1 and is located at
The axis of inner tube 1, the present apparatus also include outer tube 8, oxygen-enriched air or pure oxygen inlet pipe 9, and the coaxial sleeve of intervalve 2 is together in described
In outer tube 8 and outer tube 8 is stretched out, oxygen-enriched air or pure oxygen passage 10 and end are formed between the intervalve 2 and the outer tube 8
End is sealed using shrouding 11, and the outer tube 8 stretches into the work of the through hole of the burner block 12 and the end face of outer tube 8 retraction burner block 12
Make end face 14, between the end face of outer tube 8 and the operative end surface 14 of burner block 12 formed atomization cavity 13, the oxygen-enriched air or
Pure oxygen inlet pipe 9 is located at the tube wall of outer tube 8 and connects oxygen-enriched air or the pure oxygen passage 10.By the present apparatus, and close
Reason selection fluidisation gas medium species, atomization gas medium species and oxygen-enriched air or pure oxygen species and oxygen concentration, and it is above-mentioned each
Injection flow velocity of kind medium etc., to realize that solid fuel is efficient, cleans burning, particularly point of the solid fuel under normal temperature environment
Fire and stable burning.
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, it is preferred that the ring section of the atomization gas blowout head 6 is provided with annular and sprayed
Mouth 61, spaced apart through hole spout 62 or spaced apart U-lag spout 63, the through hole spout 62 include ladder circular hole
621 and/or isometrical circular hole 622, ladder circular hole 621 and/or isometrical circular hole 622 arranged for interval, the He of ladder circular hole 621
Isometrical circular hole 622 presses 1~3 on the ring section of the atomization gas blowout head 6:1 arranged for interval, the U-shaped of the U-lag spout 63
Groove is located at the outer ring of the atomization gas blowout head 6.
It is atomized gas blowout head and passage of the variously-shaped spout as atomization gas medium is set, is such as atomized gas medium from isometrical circle
When hole sprays at a high speed, its speed is much larger than the speed of fluidized solids fuel；In ladder circular hole, the atomization gas medium of high speed by
It is decrescence fast, it is near or below the speed of fluidized solids fuel in exit velocity；So as to form the high/low big speed difference of two classes
Atomization gas medium flow field, the atomization gas medium of high speed ensure that the length and rigidity of flame, and speed is being sprayed compared with the atomization gas medium at bottom
Near mouthful and fluidized solids fuel forms strong mixing.Compared with prior art, it is to show simultaneously the advantages of the structure
Excess fire flame black area and the control and regulation of length.
The arrangement of through hole spout can be selected in atomization gas blowout head, can be uniformly or local cypher arrangement local to add
The through hole spout put that gathers can be ladder circular hole or isometrical circular hole；The structure can ensure that solid fuel more fills
Divided combustion, avoid not being in time for material in the solid fuel particle pollution stove of burning, and square close to the ground of material in stove
The region higher into a temperature.
As shown in Figure 7, it is preferred that the diameter macropores d2 and hole diameter d1 of the ladder circular hole 621 ratio are 1.01
~100, the hole diameter d1 of the ladder circular hole 621 and the isometrical diameter d3 of circular hole 622 ratio are 0.1~10.
As shown in Figure 8, it is preferred that the through hole spout 62 or U-lag spout of the atomization gas blowout head 6 are at least one.
As shown in Figure 9 and Figure 10, it is preferred that the through hole spout 62 of the atomization gas blowout head 6 tilts 60 ° on the basis of axis
~-60 ° of angles.Through hole spout and the angled setting of axis so that directive fluidized solids fuel atomizing gas medium will be solid
Fluid fuel is broken up, and promotes mixing and burning.
As shown in Figure 11 to Figure 15, it is preferred that the spout end of said inner tube 1 is equal coupling mouth 11, contraction mouth 12, expanded
Open up mouth 13, rectangular opening 14 or oval mouth 15.Fuel nozzle ports selection equal coupling mouth, contraction mouth or extension mouth, can control solid
The jet length of The fuel stream stock jet, so as to control the length of flame.The spout of rectangle or ellipse, form width height ratio and be more than 1
Flat flame, its homogeneous heating performance is better than the flame of plain cylindrical form, so as to improve the uniformity of heating, improves product
Quality.
As shown in Figure 1, it is preferred that the leading section of the atomization gas passage 4 flushes with the spout end of said inner tube 1, institute
The leading section for stating atomization gas passage 4 protrudes from the spout end of said inner tube 1 or the leading section of the atomization gas passage 4 and is located at institute
On rear side of the spout end for stating inner tube 1.Selection and optimization atomization gas Channel front end portion and the relative position of inner tube spout, can enter one
The mixing of step control atomization gas and fuel, and the position of flame black area.
As shown in Figure 16 to Figure 21, it is preferred that the bluff body 7 flushes with the spout end of said inner tube 1, the bluff body 7
Protrude from the spout end of said inner tube 1 or the bluff body 7 is located on rear side of the spout end of said inner tube 1, the shape of the bluff body 7
Shape is taper 71, taper 71 is combined with cylinder 72 or taper 71 is combined with cylinder 72, truncated cone-shaped 73, the taper 71 and circle
The bottom chamfering of cylinder 72 that cylindricality 72 combines.The placement location of bluff body and the difference of shape, the solid fuel injection of formation
Angle and recirculation zone position, area size are different.
As shown in Figure 22 and Figure 23, it is preferred that the bluff body 7 that the taper 71 is combined with cylinder 72 is described cylindrical 72
Periphery be interval with arc groove 74 along axis.Arc groove expands solid fuel flow stock and atomization gas and high-temp combustion
The surface area of tail gas contact, contributes to the igniting of solid fuel, and improve the burn-off rate of solid fuel particle.
Preferably, the length of the atomization cavity 13 is described between the spout end diameter of 0.01 to 100 times of inner tube 1
Atomization cavity 13 is shaped as isometrical cylinder, circular cone necking shape or circular cone extension shape.
A kind of application method of above-mentioned solid fuel combustion apparatus, fluidized solids fuel are sprayed into inner tube by spout end
Going out, atomization gas is entered after the atomization gas passage between inner tube and intervalve by atomization gas input pipe to be sprayed through being atomized gas blowout head,
Oxygen-enriched air or pure oxygen enter atomization cavity and with being atomized gas medium and fluidised form through inlet tube and oxygen-enriched air or pure oxygen passage
Change solid fuel to be mutually sufficiently mixed, after preliminary igniting precombustion chamber formed it is stable, not by external interference with fluidization
Stable flame based on solid fuel.
Preferably, the atomization gas includes coke-stove gas, liquefied natural gas, propane, coal gas of converter or coal gas, or above-mentioned
The mixed gaseous fuel of fuel gas.
Preferably, when that need not carry out normal temperature igniting, the atomization gas includes air, the oxygen-enriched sky of various oxygen concentrations
Gas, pure oxygen or vapor.
Preferably, the flow velocity of the atomization gas be 0~300m/s, temperature be normal temperature or preheating temperature.
Preferably, the fluidized solids fuel includes coal dust, petroleum coke powder or biomass granule fuel, and with strength
Liquid flash calciner is to inner tube inlet.
Preferably, the gas medium of the strength liquid flash calciner is air, nitrogen, the oxygen-enriched sky of various oxygen concentrations
Gas, CO2, caused tail gas, pure oxygen and CO after various gas-solid liquid fuel combustions2The oxygen that tail gas after burning mixes is dense
The gas or composition spent 5~100% include O2/CO2/N2The mixed gas of composition.
Preferably, the gas medium temperature of the strength liquid flash calciner is -10 DEG C~1300 DEG C, the fluidized solids
Fuel is in the concentrated phase fluidised form or dilute phase fluidised form of strength liquid flash calciner, the matter of pure solid fuel and liquid flash calciner gas medium
Ratio is measured in the range of 600 to 0.1, the flow velocity of fluidized solids fuel is between 2~300m/s.
Usual oxygen-enriched air is the air that oxygen concentration is higher than 20.9%, particularly oxygen concentration coming from higher than more than 80%
Oxygen-enriched air or pure oxygen of pressure-swing absorption apparatus and deep cooling oxygenerator etc., are referred to as oxygen.Solid fuel, atomization in this method
Gas medium, oxygen-enriched air or pure oxygen spray into the precombustion chamber of stove first, and the extended corner of precombustion chamber is between 0 ~ 60 °, length is stream
1 ~ 100 times of state solid fuel ejiction opening diameter.
Gaseous fuel is not only easy to light a fire, also with atomizing, by fluidized solids fuel through being atomized gas medium Cheng Te
Fixed flow region, speed and distribution of particles, mixed combustion is carried out, atomization gas medium different in flow rate sprays and fluidized solids
During fuel mixed combustion, atomization gas medium is strengthened atomization gas medium and fired with solid while solid fuel flame length is controlled
The mixing of material, solid fuel is helped to catch fire at high temperature and steady flame.
By this technology method, and select to be easy to the gaseous fuel of igniting as atomization gas, be aided with special with strong oxidation
Property oxygen-enriched air or pure oxygen, the ignition point of solid fuel can be substantially reduced, help to catch fire and steady flame, improve efficiency of combustion
With control flame forms.Usual gaseous fuel ignition point is much lower compared with solid fuel, and safety can be carried out under normal temperature environment
Stable ignition, it helps the lighting a fire of solid fuel, steady flame, and igniting starts at ambient temperature.
Bluff body in the present apparatus forms certain spray angle, recirculating zone, solid fuel particle in solid fuel nozzle
The dense region of localized clusters and relative sparse region, according to the theory of catching fire of solid fuel ignition, these special fluidised forms and particle
Distribution reduces solid fuel particle ignition temperature, and can control the flame characteristics after catching fire.Solid fuel flammability and
The improvement of the form such as the length of flame and Temperature Distribution, efficiency of combustion and burn-off rate can be improved, reduce energy consumption and cost, improve production
Quality, increase furnace service life.
This method using the atomization gas medium of special selection, the fluidizing agent of solid fuel strength conveying, with reference to oxygen-enriched or
During all-oxygen combustion, nitrogen gas concn substantially reduces in the tail gas after burning, so as to carry out CO2Catch product and purification, carry out CO2
Geological storage and other application, realize that Air Pollutant Emission close to zero or complete zero-emission, is advantageous to environmental protection.
The present apparatus enhanced by the atomization gas blowout head of particular design atomization gas medium near spout, solid fuel and
The mixing of high-temperature tail gas, the interior solid fuel for setting bluff body the to be formed backflow of solid fuel passage, both collective effects, and pass through
The atomization gas medium of special characteristics, the pure oxygen of strong oxidisability or the excellent oxygen-enriched air of ignition performance etc. are selected, solves solid
The problem of fuel is difficult to catch fire and stablizes burning.It is special that variously-shaped and quantity spout arrangement progress in gas blowout head is atomized simultaneously
Design, more spouts are disposed adjacent to be heated to the position of material, by means of being atomized the property of gas medium, such as in stove
Strong oxidisability or the low ignitability of gaseous fuel etc., solid fuel is more fully burnt, improves the product quality of material.
Claims (10)
1. a kind of solid fuel combustion apparatus, the present apparatus includes burner block, inner tube, intervalve, atomization gas input pipe, atomization gas blowout
Head and bluff body, the burner block open up through hole, said inner tube coaxial sleeve together in the intervalve, said inner tube and intervalve it
Between form atomization gas passage, for the atomization gas channel end using shrouding sealing, the atomization gas input pipe is located at the centre
Tube wall and the atomization gas passage is connected, the atomization gas blowout head is for annular and located at the front end of the atomization gas passage
Portion, the bluff body is located at the spout end of said inner tube and positioned at the axis of inner tube, it is characterised in that：The present apparatus also includes outer
Pipe, oxygen-enriched air or pure oxygen inlet pipe, the intervalve coaxial sleeve is together in the outer tube and stretching out outer tube, the intervalve
Oxygen-enriched air or pure oxygen passage are formed between the outer tube and end is sealed using shrouding, and the outer tube stretches into the burner
The through hole and outer tunnel end reduction of area of brick enter the operative end surface of burner block, shape between the outer tube end face and the operative end surface of burner block
Into atomization cavity, oxygen-enriched air or the pure oxygen inlet pipe is located at the outer tube wall and connects the oxygen-enriched air or pure oxygen
Passage.
2. solid fuel combustion apparatus according to claim 1, it is characterised in that：The ring section of the atomization gas blowout head
Provided with annular jet, spaced apart through hole spout or spaced apart U-lag spout, the through hole spout includes ladder circular hole
And/or isometrical circular hole, the ladder circular hole and/or isometrical circular hole arranged for interval, the ladder circular hole and isometrical circular hole are described
It is atomized on the ring section of gas blowout head and presses 1~3:1 arranged for interval, the U-lag of the U-lag spout are located at the atomization gas blowout head
Outer ring.
3. solid fuel combustion apparatus according to claim 2, it is characterised in that：The diameter macropores of the ladder circular hole with
The ratio of hole diameter is 1.01~100, and the ratio of the hole diameter of the ladder circular hole and the isometrical Circularhole diameter is 0.1
~10.
4. solid fuel combustion apparatus according to claim 2, it is characterised in that：The through hole spout of the atomization gas blowout head
60 °~-60 ° angles are tilted on the basis of axis.
5. solid fuel combustion apparatus according to claim 1, it is characterised in that：The spout of the bluff body and said inner tube
After end flushes, the bluff body protrudes from the spout end of said inner tube or the bluff body is located at the spout end of said inner tube
Side, the bluff body be shaped as taper, taper combine with cylinder or taper is combined with cylindrical, truncated cone-shaped, the taper and
The cylindrical bottom chamfer of cylinder combination.
6. solid fuel combustion apparatus according to claim 1, it is characterised in that：The length of the atomization cavity is 0.01
To between the spout end diameter of 100 times of inner tubes, the atomization cavity is shaped as isometrical cylinder, circular cone necking shape or circular cone
Extend shape.
A kind of 7. application method of any one of claim 1 to 6 solid fuel combustion apparatus, it is characterised in that：Fluidization
Solid fuel is sprayed into inner tube by spout end, the mist that atomization gas is entered between inner tube and intervalve by atomization gas input pipe
Sprayed after changing gas passage through being atomized gas blowout head, oxygen-enriched air or pure oxygen enter atomization through inlet tube and oxygen-enriched air or pure oxygen passage
Cavity and mutually it is sufficiently mixed with atomization gas medium and fluidized solids fuel, stabilization is formed in precombustion chamber after preliminary igniting
, not by the stable flame based on fluidized solids fuel of external interference.
8. the application method of solid fuel combustion apparatus according to claim 7, it is characterised in that：The atomization gas includes
Coke-stove gas, liquefied natural gas, propane, coal gas of converter or coal gas, or the mixed gaseous fuel of above-mentioned fuel gas, need not
When carrying out normal temperature igniting, the atomization gas includes air, the oxygen-enriched air of various oxygen concentrations, pure oxygen or vapor, the mist
The flow velocity for changing gas is 0~300m/s, temperature is normal temperature or preheating temperature.
9. the application method of solid fuel combustion apparatus according to claim 7, it is characterised in that：The fluidized solids
Fuel includes coal dust, petroleum coke powder or biomass granule fuel, and with strength liquid flash calciner to inner tube inlet, the strength
The gas medium of liquid flash calciner is air, nitrogen, the oxygen-enriched air of various oxygen concentrations, CO2, the combustion of various gas-solid liquid fuels
Caused tail gas, pure oxygen and CO after burning2The oxygen concentration that tail gas after burning mixes 5~100% gas or into subpackage
Include O2/CO2/N2The mixed gas of composition.
10. the application method of solid fuel combustion apparatus according to claim 9, it is characterised in that：The strength fluidised form
The gas medium temperature for changing conveying is -10 DEG C~1300 DEG C, and the fluidized solids fuel is in the dense of strength liquid flash calciner
The mass ratio of phase fluidised form or dilute phase fluidised form, pure solid fuel and liquid flash calciner gas medium is in the range of 600 to 0.1, fluidised form
Change the flow velocity of solid fuel between 2~300m/s.
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| CN201610702621.3A CN107763663A (en) | 2016-08-23 | 2016-08-23 | Solid fuel combustion apparatus and its application method |
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| CN201610702621.3A CN107763663A (en) | 2016-08-23 | 2016-08-23 | Solid fuel combustion apparatus and its application method |
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| CN112594681A (en) * | 2019-10-01 | 2021-04-02 | 中外炉工业株式会社 | Liquid fuel combustion device |
| CN114688529A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Pre-film type gas-assisted atomizing nozzle with raised ridge structure |
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