CN109973999A - A kind of oil-gas two-way low NO for boiler combustion - Google Patents
A kind of oil-gas two-way low NO for boiler combustion Download PDFInfo
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- CN109973999A CN109973999A CN201910340747.4A CN201910340747A CN109973999A CN 109973999 A CN109973999 A CN 109973999A CN 201910340747 A CN201910340747 A CN 201910340747A CN 109973999 A CN109973999 A CN 109973999A
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- combustion
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/38—Nozzles; Cleaning devices therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/44—Preheating devices; Vaporising devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
- F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L1/00—Passages or apertures for delivering primary air for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A kind of oil-gas two-way low NO for boiler combustion, including oil gun, economizer bank, air gun, air duct, nozzle assembly.The centre of burner body, including atomizing medium pipe, fuel pipe and oil thrower component is arranged in oil gun.Economizer bank is cylindric in a hollow ring, is circumferentially positioned at the lateral surface of fuel pipe.Air gun is circumferentially positioned at the outside of economizer bank, including fuel gas conduit, gas nozzle component.Air duct includes an air duct and secondary air duct.Air duct is sheathed on the lateral surface of air gun.Cyclone is set in air duct.Cyclone end is connected with flared type flame holder；Flaring flame holder is connect with combustion chamber, and is nested in combustion chamber stove within the walls；Multiple Secondary Air entrances are provided with around flared type flame holder.The present invention can promote the mixing of oil gas dual-fuel and air, and the technologies such as air wind scale and flue gas recirculation are rejoined in the burning of enhanced fuel, reduce the generation and discharge of nitrogen oxides.
Description
Technical field
The present invention relates to a kind of oil-gas two-way low NOs for boiler combustion, belong to technical field of combustion equipment.
Background technique
Requirement with country and place to pollutant especially discharged nitrous oxides is increasingly strict, and pot furnace fuel occurs
Variation, is gradually converted to based on fuel oil, combustion gas based on fire coal by traditional.Fuel oil, gas burner are answered as a result,
With growing day by day.Since user uses the uncertainty with storage to fuel, oil-gas two-way burner comes into being, its appearance
Flexible use of the user to fuel is facilitated, no longer arrests and is limited to using a kind of fuel, is no longer worried because the single energy is temporarily short
Lack and have to blowing out the problem of.But current oil-gas two-way burner still suffers from fuel quality and uses limited, burning not
Sufficiently, discharged nitrous oxides are unsatisfactory for the emission request of country and place, it is therefore desirable to the structure shape of oil-gas two-way burner
Formula carries out in-depth study.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of oil-gas two-way low NOs efficiently, environmentally friendly, to have
Effect solve fuel quality using be limited, the insufficient, discharged nitrous oxides that burn are unsatisfactory for country and the emission request in place is asked
Topic.
The invention is realized by the following technical scheme:
A kind of oil-gas two-way low NO for boiler combustion, including oil gun, economizer bank, air gun, air duct, nozzle sets
Part.
The oil gun includes atomizing medium pipe, fuel pipe and fuel nozzle.The atomizing medium Guan Weiyi cylindrical tube.
Atomizing medium pipe front end connects atomizing medium entrance, and rear end is atomizing medium outlet, is in gradually-reducing shape.The fuel pipe is arranged
On the outside of atomizing medium pipe, cylindrical tube in a ring.The oil gun front end closing, end outlet end are in a circular table shape.The rotary table
Several equally distributed mist of oil spouts are arranged in shape outlet end.The mist of oil spout central line is from the mist of oil import to oil mist outlet
Direction is gradually distance from the center line of the burner, and in an acute angle and is directed toward in flaring flame holder between burner centerline
Recirculating zone.
The economizer bank is cylindric in a hollow ring, is circumferentially positioned at the lateral surface of fuel pipe.Outside the fuel pipe
The medial surface of side and economizer bank forms annular return flue gas passage gaps.End seal before the annular return flue gas passage gaps
It closes, rear end is open, connect with combustion chamber.The setting of economizer bank can provide inner cycle channel for interior circulation occurs in burner hearth, make
Combustion product is heated at reflux fuel oil (or combustion gas), reduces the viscosity of fuel oil, improves fuel-oil atmozation quality, obtain good atomization with
Ignition condition.
The air gun is the cylindrical-shaped structure of an annular, is looped around the outside of the economizer bank, including fuel gas conduit, gas injection
Nozzle assembly.The lateral surface of the economizer bank and the medial surface of fuel gas conduit are formed with annular fuel gas passage gaps；The annular fuel gas
The closing of passage gaps front end, top connect a fuel gas inlet, and rear end is in a circular table shape.The round table-like outlet end is equipped with by multiple
The gas nozzle component of equally distributed combustion gas spout composition.The combustion gas spout center line is directed toward institute from the gas inlet
It states gas outlet direction and is gradually distance from the burner centerline, be in an acute angle between center line and this burner centerline
And it is directed toward the recirculating zone in flaring flame holder.
Air duct, the air duct include an air duct and secondary air duct.Air duct is sheathed on the lateral surface of air gun.Institute
State setting cyclone in an air duct.The cyclone end is connected with a flared type flame holder.The flared type flame holder with
Combustion chamber is connected, and is nested in combustion chamber stove within the walls；Multiple Secondary Air entrances are provided with around the flared type flame holder.
Preferably, burner can be used in combination with smoke backflow, after flue gas mixes with air, can be flowed by First air entrance
Air duct, can also be by Secondary Air entrance flowing in combustion chamber.
Preferably, burner can be used in combination with smoke backflow, can be by First air entrance, two after flue gas mixes with air
Secondary wind entrance separately flows into air duct and combustion chamber.
Preferably, combustion gas spout center line and burner centerline are in 15~40 ° of angles.
Preferably, mist of oil spout central line and burner centerline are in 15~40 ° of angles.
Preferably, flaring flame holder and burner centerline are in 18~40 ° of angles.
Preferably, it is flared around flame holder and is uniformly distributed multiple Secondary Air entrances.
Preferably, mist of oil notch setting has 5 to 12, and combustion gas spout is provided with 20 to 40.
By said structure design, the present invention can be achieved oil gas and be used in combination or be used alone, and realize stability and high efficiency combustion
It burns, inhibits the generation and discharge with reduction nitrogen oxides to greatest extent.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.Wherein:
Fig. 1 is the structural schematic diagram in one embodiment of the invention for the oil-gas two-way low NO of boiler combustion；
Fig. 2 and Fig. 3 is the structural schematic diagram of oil thrower and gas nozzle component in one embodiment of the invention.
Description of symbols:
Fuel filler 1, atomizing medium entrance 2, atomizing medium pipe 3, fuel pipe 4, fuel gas inlet 5, economizer bank 6, fuel gas conduit
7, an air duct 8, cyclone 9, gas nozzle component 10, secondary air duct 11, flaring flame holder 12, fuel nozzle component 13, mist
Change media outlet 14, First air entrance 15, Secondary Air entrance 16, mist of oil spout 17, combustion gas spout 18, swirl vane 19.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Fig. 1 is please referred to Fig. 3, wherein Fig. 1 is the structural representation of oil-gas two-way low NO in one embodiment of the invention
Figure；Fig. 2 and Fig. 3 is the structural schematic diagram of nozzle assembly in one embodiment of the invention.
The invention discloses a kind of oil-gas two-way low NOs for boiler combustion, including such as lower component:
1, oil gun
The oil gun is double-jacket tube formula construction, including atomizing medium pipe 3, fuel pipe 4 and fuel nozzle 10.The atomization
Medium tube 3 is a cylindrical tube.3 front end of atomizing medium pipe connects atomizing medium entrance 1, rear end and atomizing medium outlet 14
It is connected, is in gradually-reducing shape.The fuel pipe 4 is set in 3 outside of atomizing medium pipe, medial surface and the atomizing medium pipe 3 of fuel pipe 4
Lateral surface forms annular fuel oil runner.The annular fuel oil runner front end connects fuel filler 2, rear end outlet end in a circular table shape.
Fuel nozzle 10 is provided on the round table-like outlet end side surface normal direction position.Multiple uniform points are arranged around the fuel nozzle
The mist of oil spout 17 of cloth.17 center line of mist of oil spout is gradually distance from described from mist of oil import direction oil mist outlet direction
The center line of burner is in certain acute angle between center line and this burner centerline and is directed toward returning in flaring flame holder 12
Flow area.
The number of the mist of oil spout is 5~12, and mist of oil spout central line and burner centerline are in 15~40 ° of folders
Angle.
2, economizer bank 6
The economizer bank 6 is cylindric in a hollow ring, is circumferentially positioned at the lateral surface of fuel pipe 4.The fuel pipe 4
The medial surface of lateral surface and economizer bank 6 forms annular return flue gas passage gaps.The annular return flue gas passage gaps front end
Closing, rear end is open, connect with combustion chamber.The setting of economizer bank 6 can provide inner cycle channel for interior circulation occurs in burner hearth,
So that combustion product is heated at reflux fuel oil (or combustion gas), reduce the viscosity of fuel oil, improves fuel-oil atmozation quality, obtain good atomization
With ignition condition.
3, air gun
The air gun is the cylindrical-shaped structure of a hollow ring, is sheathed on the outside of the economizer bank, including fuel gas conduit 7,
Gas nozzle component 10.The lateral surface of the economizer bank 6 and the medial surface of fuel gas conduit 7 are formed with annular fuel gas passage gaps；Institute
The closing of annular fuel gas passage gaps front end is stated, top connects a fuel gas inlet 5, and rear end is in a circular table shape.The round table-like outlet end
Gas nozzle 9 is set on the normal direction position of side.The fuel gas inlet 5 is close to air gun closed end, external air supply system.The combustion gas
Nozzle is equipped with several equally distributed combustion gas spouts 18, and 18 center line of combustion gas spout is directed toward from the spout air inlet to be sprayed
Mouth gas outlet direction is gradually distance from the center line of the burner, is in certain acute angle between center line and this burner centerline
And it is directed toward the recirculating zone in flaring flame holder 12.
The number of the combustion gas spout is 20~40, and combustion gas spout center line and burner centerline are in 15~40 ° of folders
Angle.
4, air duct
The air duct includes an air duct 8 and secondary air duct 11.Air duct 8 is sheathed on air gun lateral surface, described
Air passing clearances are formed between the lateral surface of air gun and the medial surface in an air duct 8；The front end in air duct 8
Closed end, bottom end connect First air entrance 15, and rear end connects cyclone 9；The cyclone 9 is made of multiple axial blades 19,
Air is flowed into aforementioned flaring flame holder 12 in cyclonic form to be diffused and generate recirculating zone.9 front end of cyclone connects
Connect an air duct, rear end connection enlarging flame holder 12；The flared type flame holder 12 is connect with combustion chamber, and is nested in combustion chamber
In furnace wall；Several Secondary Air entrances 16 are provided with around the flared type flame holder 12.
The burner can be used in combination with smoke backflow, after flue gas mixes with air, can flow into wind by First air entrance 5
Road, can also be by 16 flowing in combustion chamber of Secondary Air entrance.
The burner can be used in combination with smoke backflow, can be by First air entrance 5, secondary after flue gas mixes with air
Wind entrance 16 separately flows into air duct and combustion chamber.
The flaring flame holder 12 is in 18~40 ° of angles with burner centerline.
Multiple Secondary Air entrances are uniformly distributed around the flaring flame holder 12.
In the present invention, the air flow of oil-gas two-way low NO is as follows: outside air (or air and boiler tail are taken out
The gaseous mixture that the part low-temperature circulating flue gas taken is formed) via two parts are divided into after blower, major part is entered by First air
Mouth 15 enters air duct 8, forms swirling eddy by cyclone 9 and sprays into combustion chamber, remaining fraction is entered by Secondary Air entrance 16
Combustion chamber.
In the present invention, the independent fuel flow path of the oil-gas two-way low NO for boiler combustion is as follows: fuel oil is through supplying
Oil system enters fuel pipe 4 after atomizing medium (steam or compressed air) is entered by atomizing medium entrance 1 by fuel filler 2 and adds
The fuel oil flowed in heating oil pipe 4 is mutually hit with atomizing medium with certain angle at oil thrower, is formed for the first time
Atomization, oil film or oil droplet after atomization are injected in burner hearth by mist of oil spout.First air into air duct enters by swirl vane
The swirl channel of 19 compositions forms rotating flow and is collided with mist of oil, and mist of oil is made to carry out secondary-atomizing.Whirl deposite tank forms central negative
Pressure area can form high temperature fluid recirculating zone in nozzle exit, play the role of improving ignition performance and stablize flame.It is another
Partial air is entered by the Secondary Air entrance 16 on flared type flame holder 12, and supplement fuel oil burns away required air.
In the present invention, the independent fuel gas flow path of the oil-gas two-way low NO for boiler combustion is as follows: combustion gas is through supplying
Gas system by fuel gas inlet 5 enter fuel gas conduit 7 after after multiple equally distributed combustion gas spouts 18 by certain tilt angle quilt
It spurts into burner hearth, the First air then exported with cyclone 9 is diffused mixed firinor fuel burning.Secondary Air is by flared type flame holder 12
On Secondary Air entrance 16 enter, supplement combustion gas burns away required air.
It is had the advantages that under the structure
In the case where fuel oil operating condition is used alone, it is logical that the setting of economizer bank 6 can provide interior circulation for the interior circulation of generation in burner hearth
Reflux can be achieved under the action of combustion-supporting gas eddy flow, make flue gas carry out being heated at reflux fuel oil, improve fuel oil for road, combustion product
Mobility strengthens atomizing effect.
In the case where combustion gas operating condition is used alone, the setting of economizer bank 6 can make combustion gas quick ignition, low more particularly to help
The kindling of value heat fuel and going on smoothly for burning.
The arrangement of air hose has carried out First air and Secondary Air air stage feeding, and First air is in rotating flow after swirl channel,
It is combined with flared type flame holder 12, forms the recirculating zone of high temperature gas flow in nozzle exit, improve ignition performance, realize and stablize
Ignition.The arrangement of secondary air channel enhances combustion gas and the after burning of mist of oil, according to the size of the length of flame, can be changed two
The tilt angle of secondary air hose.
Burner can be used in combination with smoke backflow, after flue gas mixes with air, can be entered by First air entrance 15, Secondary Air
Mouth 16 separately flows into air duct and combustion chamber, can also flow into air duct by First air entrance 15, can also be flowed into and be fired by Secondary Air entrance 16
Room is burnt, flue gas recirculation rate is up to 30~40%.
Multiple mist of oils (or combustion gas) spout is uniformly arranged in nozzle assembly, on nozzle body, mist of oil (or combustion gas) sprays
Towards air duct center, such mist of oil (or combustion gas) is uniform to all directions spouting velocity in direction, and one time Whirl deposite tank volume is inhaled, and makes mist of oil
(or combustion gas) is quickly uniformly mixed with air, forms the combustion atmosphere of poor fuel, enriched air, fuel combustion NO can be effectively suppressedx
Generation.The flame formed by First air and fuel is under 12 guide functions of flared type flame holder, from burner centre to periphery
Diffusion, and blend by be vortexed volume inhale Lai high-temperature flue gas.Result in formation of fuel-riches, low oxygen concentration combustion atmosphere, encounter secondary
When wind, residual fuel is burnt again under low oxygen concentration atmosphere, effectively inhibits NOxGeneration.
The technology of the present invention effect is as follows: the present invention passes through multiple and burner centerline fuel jet in a certain angle
17, the setting of combustion gas spout 18, fuel nozzle ports end are flared the setting of flame holder 12, the structures such as arrangement of air duct inward turning circulation road 9
Design, can promote the mixing of fuel and air, to improve the combustion stability and efficiency of combustion of fuel, rejoin air wind
The technologies such as grade and flue gas recirculation, the purpose for realizing low-temperature burning, stablizing burning inhibit to greatest extent and reduce nitrogen oxides
It generates and discharge, nitrous oxides concentration is lower than 30mg/m3。
The above is only a preferred embodiment of the present invention, is not intended to restrict the invention, and comes for those skilled in the art
It says, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any modification, equivalent
Replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of oil-gas two-way low NO for boiler combustion, which is characterized in that the burner includes oil gun, preheating
Pipe, air gun, air duct, nozzle assembly；The centre of burner body, including atomizing medium pipe (3), ring is arranged in the oil gun component
Around the fuel pipe (4) and oil thrower component (13) being distributed on the outside of atomizing medium pipe；The economizer bank (6) is in a hollow ring
Shape is cylindric, is circumferentially positioned at the lateral surface of fuel pipe (4)；The air gun is circumferentially positioned at the outside of oil gun, including fuel gas conduit
(7), gas nozzle component (10)；The air duct includes an air duct (8) and secondary air duct (11)；Air duct (8) set
Set on the lateral surface of air gun；Cyclone (9) are set in air duct (8)；Cyclone (9) end and a flared type are steady
Flame device (12) is connected；The flared type flame holder (12) is connected with combustion chamber, and is nested in combustion chamber stove within the walls；The flared type
Multiple Secondary Air entrances (16) are provided with around flame holder (12).
2. the oil-gas two-way low NO according to claim 1 for boiler combustion, which is characterized in that the oil gun
For sleeve type structure, including atomizing medium pipe (3), fuel pipe (4) and fuel nozzle component (13)；The atomizing medium pipe
(3) it in cylindrical tube, front end connects atomizing medium entrance 2, and rear end is in gradually-reducing shape, connects atomizing medium outlet end (14)；Institute
Atomizing medium outlet end (14) is stated to be nested in the outlet end of the fuel pipe (4) rear end；The fuel pipe (4) is set in atomization
On the outside of medium tube (3), fuel pipe (4) medial surface and atomizing medium pipe (3) lateral surface form fuel oil runner in a ring；The annular
Fuel oil runner front end connects fuel filler (1), and end outlet end is in a circular table shape, is arranged on the round table-like exit end face by multiple
The fuel nozzle component (13) of equally distributed mist of oil spout (17) composition；(17) center line of the mist of oil spout is from the oil
Mist import is directed toward the oil mist outlet direction and is gradually distance from the burner centerline, center line and this burner centerline it
Between in an acute angle and the recirculating zone be directed toward in flared type flame holder (12).
3. the oil-gas two-way low NO according to claim 1 for boiler combustion, which is characterized in that the preheating
Managing (6) is in that a hollow ring is cylindric, is circumferentially positioned at the lateral surface of fuel pipe (4)；The lateral surface of the fuel pipe (4) and pre-
The annular return flue gas passage gaps that the medial surface of heat pipe (6) is formed；The annular return flue gas passage gaps front end closing, after
End opens, and connect with combustion chamber；The setting of economizer bank (6) can provide inner cycle channel for interior circulation occurs in burner hearth, make to fire
Burn product reflux heated fuel oil (or combustion gas), reduce the viscosity of fuel oil, improve fuel-oil atmozation quality, obtain good atomization with
Fiery condition.
4. the oil-gas two-way low NO according to claim 1 for boiler combustion, which is characterized in that the air gun
For the cylindrical-shaped structure of an annular, it is looped around the outside of the economizer bank (6), including fuel gas conduit (7), gas nozzle component
(10)；The lateral surface of the economizer bank (6) and the medial surface of fuel gas conduit (7) are formed with annular fuel gas passage gaps；The annular
The closing of gas circulation gap front end, top connect a fuel gas inlet (5), and rear end is in a circular table shape；It is set on the round table-like outlet end
By the gas nozzle component (10) being made of multiple equally distributed combustion gas spouts (18)；Combustion gas spout (18) center line is certainly
The gas inlet is directed toward the gas outlet direction and is gradually distance from the burner centerline, center line and this burning
The recirculating zone for being in an acute angle between device center line and being directed toward in flaring flame holder (12).
5. the oil-gas two-way low NO according to claim 1 for boiler combustion, which is characterized in that burner with
Flue gas outer loop is used in combination, and after flue gas mixes with air, can be flowed respectively by First air entrance (15), Secondary Air entrance (16)
Air inlet duct and combustion chamber；Air duct only can also be entered by First air entrance (15), combustion chamber can also be entered by Secondary Air entrance (16).
6. the oil-gas two-way low NO according to claim 1 for boiler combustion, which is characterized in that combustion gas spout
(18) center line and burner centerline be in 15~40 ° of angles, mist of oil spout (17) center line and burner centerline in 15~
40 ° of angles.
7. the oil-gas two-way low NO according to claim 1 for boiler combustion, which is characterized in that be flared steady flame
Multiple Secondary Air entrances (16) are uniformly distributed around device (12).
8. the oil-gas two-way low NO according to claim 1 for boiler combustion, which is characterized in that mist of oil spout
(17) number is 5~12, and the number of combustion gas spout (18) is 20~40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340747.4A CN109973999A (en) | 2019-04-25 | 2019-04-25 | A kind of oil-gas two-way low NO for boiler combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340747.4A CN109973999A (en) | 2019-04-25 | 2019-04-25 | A kind of oil-gas two-way low NO for boiler combustion |
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| Publication Number | Publication Date |
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| CN109973999A true CN109973999A (en) | 2019-07-05 |
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| CN201910340747.4A Pending CN109973999A (en) | 2019-04-25 | 2019-04-25 | A kind of oil-gas two-way low NO for boiler combustion |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183758A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | Device for burning wastes by low-calorific-value gas |
| CN114440214A (en) * | 2022-01-24 | 2022-05-06 | 上海应用技术大学 | Non-premixed air classification low NOx combustor |
| CN115930436A (en) * | 2022-12-16 | 2023-04-07 | 湘潭大学 | Oil-gas dual-purpose double-layer hot blast stove and operation method |
-
2019
- 2019-04-25 CN CN201910340747.4A patent/CN109973999A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440214A (en) * | 2022-01-24 | 2022-05-06 | 上海应用技术大学 | Non-premixed air classification low NOx combustor |
| CN114183758A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | Device for burning wastes by low-calorific-value gas |
| CN115930436A (en) * | 2022-12-16 | 2023-04-07 | 湘潭大学 | Oil-gas dual-purpose double-layer hot blast stove and operation method |
| CN115930436B (en) * | 2022-12-16 | 2024-04-12 | 湘潭大学 | Dual-purpose double-layer type hot blast stove for oil and gas and operation method |
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