CN106949471A - A kind of multistage premix burner of low emission cool flame - Google Patents

A kind of multistage premix burner of low emission cool flame Download PDF

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Publication number
CN106949471A
CN106949471A CN201710260036.7A CN201710260036A CN106949471A CN 106949471 A CN106949471 A CN 106949471A CN 201710260036 A CN201710260036 A CN 201710260036A CN 106949471 A CN106949471 A CN 106949471A
Authority
CN
China
Prior art keywords
gas
flame
blowing outlets
air
burning torch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710260036.7A
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Chinese (zh)
Inventor
代森伟
任转波
范中华
孙仁权
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anderson Heat Energy Science And Technology (suzhou) Co Ltd
Original Assignee
Anderson Heat Energy Science And Technology (suzhou) Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anderson Heat Energy Science And Technology (suzhou) Co Ltd filed Critical Anderson Heat Energy Science And Technology (suzhou) Co Ltd
Priority to CN201710260036.7A priority Critical patent/CN106949471A/en
Publication of CN106949471A publication Critical patent/CN106949471A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/48Nozzles
    • F23D14/58Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/62Mixing devices; Mixing tubes

Abstract

The present invention provides a kind of low emission cool flame multistage premix burner, including burning torch, gas injection tracheae, and the gas injection tracheae is provided with gas-blowing outlets at three, passes through three combustion zones, fractional combustion;Premixed flame is ejected at a high speed from gas-blowing outlets, touch heat transfer tube rapidly, so that flame temperature rapid decrease, touch the flame of refrigerant, it is reflected back, forms the gas curtain of burning so that the waste gas after burning is participated in second-time burning, flue gas recirculation is served as, the generation of nitrogen oxides is effectively reduced;Unique venturi pre-mixed configuration make it that air, fuel mixing are more abundant;Pass through top adjustment ratio, the burning torch of wide coefficient of excess air scope, it is ensured that flame can smoothly be set up.

Description

A kind of multistage premix burner of low emission cool flame
Technical field
The present invention relates to a kind of burner, particularly a kind of boiler multistage premix burner of low emission cool flame.
Background technology
With rapid industrial development, environmental pollution becomes increasingly serious, the combustion technology of high-efficiency low-pollution and opening for product Hair research is increasingly important.
The burning of low stain is nitrogen oxides (NO in control combustion processX) discharge, NOXGeneration mainly with burning Oxygen content factor in the temperature of flame, burning gases in the concentration of oxygen, burning gases holdup time at high temperature and fuel It is relevant.
Existing boiler-burner does combustion tube using metallic fiber, pre-mixing gas combustion is burnt in metal surface, for reality Existing low emission, usual excess air needs to control 40% or so, and the efficiency of surface combustion is low.Due to the web of metallic fiber Lattice are small, and multilayer is arranged, and the dirty particle in a denier air enters, and can block grid, cause local temperature to uprise, metallic fiber It is burned out therewith.
Flue gas recirculating technique a part of will be vented and return to plenum system, and the oxygen concentration in reduction gaseous mixture plays heat The effect of absorber is measured, does not cause ignition temperature to become too high, so as to suppress the generation of nitrogen oxides.Flue gas recirculation rate is typically The 5-20% of tail gas total amount, makes NOXYield reduces 10-90%.But using flue gas recirculation, it is necessary to increase pipeline, space Deficiency, if flue gas and combustion fan entrance distance are remote, EGT is too high, less practical, and winter temperature is low, can produce condensation Water, adds maintenance difficulty.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, it is an object of the invention to provide a kind of low emission simple in construction is cold Flame multistage premix burner.
To reach above-mentioned purpose, the technical solution adopted for the present invention to solve the technical problems is:
A kind of multistage premix burner of low emission cool flame, including:
Gas injection tracheae, provided with gas-blowing outlets at three, is formed between the gas injection tracheae perimeter and heated object Combustion chamber;
Burning torch, its lighting-up tuyere be arranged on gas-blowing outlets at described three it is any one or more.
Further, the first gas-blowing outlets are provided with the roof of the combustion gas injection tube head, for when flowing through described the A part for the air-fuel mixture of one gas-blowing outlets sets up the first flame when being ignited, first flame is from the combustion The roof on gas blowout tracheae head stretches out, and first gas-blowing outlets are multiple small through hole, and the small through hole is from roof center Extend to circumferential side wall and arrange.
Further, the circumferential side wall of the combustion gas injection tube head is provided with the second gas-blowing outlets, and second jet goes out Mouthful towards heated object, for when flowing through a part for air-fuel mixture for second gas-blowing outlets and being ignited The second flame is set up in the combustion chamber, second flame forms stable tip on heated object surface.
Further, the circumferential side wall of the gas injection tracheae is provided with the 3rd gas-blowing outlets, the 3rd gas-blowing outlets court To heated object, for when flowing through a part for air-fuel mixture for the 3rd gas-blowing outlets and being ignited described The 3rd flame is set up in combustion chamber, the 3rd flame forms stable tip on heated object surface.
Using above-mentioned preferred scheme, pass through three combustion zones, fractional combustion;Burning torch is located at the first gas-blowing outlets, First flame is produced herein, extend between Shi centers and periphery edge being lighted, to keep lighting for the second flame separated; The second flame (main fire) after the generation of first flame at the second gas-blowing outlets is to be ignited;When main fiery increased flow capacity, the 3rd The 3rd flame at gas-blowing outlets is produced, and forms petal flame;Second flame (main fire) sprays at a high speed from the second gas-blowing outlets Go out, heated object is touched rapidly so that flame temperature rapid decrease, touch the flame of refrigerant, be reflected back, form combustion The gas curtain of burning so that the waste gas after burning is participated in the second-time burning at the 3rd gas-blowing outlets, serves as flue gas recirculation, effectively Reduce the generation of nitrogen oxides.
Further, the burning torch is located at the gas injection pipe, and the burning torch is included from inside to outside successively The spark plug that is arranged, burning torch Gas Pipe, burning torch air hose, the plug ignition mouthful, the outlet of burning torch Gas Pipe, igniting Rifle air pipe outlets are arranged at first gas-blowing outlets, the burning torch Gas Pipe, burning torch air hose afterbody difference Provided with burning torch fuel gas inlet, burning torch air intlet.
Using above-mentioned preferred scheme, burning torch is located at gas injection pipe, possesses single Gas Pipe, air hose knot Structure, its excess air coefficient, which enters scope, can realize 0.5-100, the change for realizing anti-complicated burning situation air pressure, air-flow, It is stable to set up ignition flame.
Further, first gas-blowing outlets export the 10%-30% of air-fuel mixture gas output, Second gas-blowing outlets export the 40%-80% of air-fuel mixture gas output, and the 3rd gas-blowing outlets are led Go out the 10%-30% of air-fuel mixture gas output.
Using above-mentioned preferred scheme, each corresponding gas output of gas-blowing outlets is provided by the construction of each gas-blowing outlets, with Realize flue gas recirculation, it is ensured that the low emission of nitrogen oxides.
Further, the distance between described second gas-blowing outlets and the 3rd gas-blowing outlets are the combustion gas injection pipe diameter 2-4 times.
Further, 2-4 times of a diameter of combustion gas injection pipe diameter of heated object.
Using above-mentioned preferred scheme, suitably sized Proportionality design is more easy to realize cool flame, it is ensured that the abundant and height of burning Effect, realizes minimum discharge.
Further, the gas injection tracheae tail end is connected with premix case, described premix case one end and air supply pipe phase Venturi tube is provided with connection, the premix case, the Venturi tube big opening end is fitted with the premix chamber interior wall, described The small openend of Venturi tube and the gas injection tracheae tail end opening in communication, the Venturi tube perimeter with it is described pre- The cavity that mixed case interior zone is formed is fuel supply channel, and the premix case tank wall is by Venturi tube big opening end provided with combustion Expect supply mouth, the Venturi tube is provided with fuel delivery outlet by the tube wall of small openend.
Using above-mentioned preferred scheme, during the flow section that air is reduced by Venturi tube, there is showing for flow velocity increase As the increase of flow velocity generates swabbing action along with the reduction of air pressure to fuel so that air preferably enters with fuel Row premixing.
Further, the air supply pipe is vertically arranged with the premix case, and connection transition face is cambered surface.
Using above-mentioned preferred scheme so that air forms agitation air-flow in premix case, it can be carried out with fuel more preferable Premix.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the structural representation of gas injection tracheae;
Fig. 3 is the flame schematic diagram generated between gas injection tracheae and heated object;
Fig. 4 is the structural representation of burning torch.
Numeral and the title of the corresponding component represented by letter in figure:
1- heated objects;2- gas injection tracheaes;The gas-blowing outlets of 21- first;The gas-blowing outlets of 22- second;The jets of 23- the 3rd go out Mouthful;The flames of 211- first;The flames of 221- second;The flames of 231- the 3rd;3- premixes case;4- Venturi tubes;5- air supply pipes;6- Fuel supply mouth;7- fuel delivery outlets;8- burning torches;81- spark plugs;811- plug ignitions mouthful;82- burning torch Gas Pipes; 821- burning torch fuel gas inlets;83- burning torch air hoses;831- burning torch air intlets.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
In order to reach the purpose of the present invention, as shown in figure 1, one embodiment of the present invention is:A kind of low emission cool flame Multistage premix burner, including gas injection tracheae 2, burning torch 8, gas injection tracheae 2 are provided with gas-blowing outlets, gas injection tracheae at three Combustion chamber is formed between 2 perimeters and heated object 1;The lighting-up tuyere of burning torch 8 is arranged on any of gas-blowing outlets at described three One or more.
It is using the beneficial effect of above-mentioned technical proposal:By three combustion zones, fractional combustion effectively reduces nitrogen oxidation The generation of thing.
As Figure 2-3, in other embodiments of the present invention, in order to reach flue gas recirculation, to realize low row The first gas-blowing outlets 21 are provided with the purpose put, the roof on the head of gas injection tracheae 2, the first gas-blowing outlets 21 are flowed through for working as Set up the first flame 211 when a part for air-fuel mixture is ignited, the first flame 211 is from the head of gas injection tracheae 2 Roof stretches out, and the first gas-blowing outlets 21 are multiple small through hole, and the small through hole extends row from roof center to circumferential side wall Row;The circumferential side wall on the head of gas injection tracheae 2 is provided with the second gas-blowing outlets 22, and the second gas-blowing outlets 22 are used towards heated object 1 In setting up second in the combustion chamber when flowing through a part for air-fuel mixture for the second gas-blowing outlets 22 and being ignited Flame 221, the second flame 221 forms stable tip on the surface of heated object 1;The circumferential side wall of gas injection tracheae 2 is provided with Three gas-blowing outlets 23, the 3rd gas-blowing outlets 23 are towards heated object 1, for when the air-fuel for flowing through the 3rd gas-blowing outlets 23 The 3rd flame 231 is set up when a part for mixture is ignited in the combustion chamber, the 3rd flame 231 is in the table of heated object 1 Face forms stable tip.
Pass through three combustion zones, fractional combustion;Burning torch 8 is located at the first gas-blowing outlets 21, and the first flame 211 is produced herein It is raw, extend between Shi centers and periphery edge being lighted, to keep lighting for the second flame 221 separated;First flame 211 The second flame 221 (main fire) after generation at the second gas-blowing outlets 22 is to be ignited;When main fiery increased flow capacity, the 3rd jet Export the 3rd flame 231 at 23 to produce, form petal flame.It is using the beneficial effect of above-mentioned technical proposal:Second fire Flame 221 (main fire) is ejected from the high speed of the second gas-blowing outlets 22, heated object 1 is touched rapidly so that under flame temperature is quick Drop, touches the flame of refrigerant, is reflected back, and forms the gas curtain of burning so that the waste gas after burning participates in the 3rd jet Export in the second-time burning at 23, serve as flue gas recirculation, effectively reduce the generation of nitrogen oxides.
As shown in figure 4, in other embodiments of the present invention, in order to reach the stable purpose for setting up ignition flame, Burning torch 8 is located inside gas injection tracheae 2, and burning torch 8 includes spark plug 81, the burning torch Gas Pipe being arranged successively from inside to outside 82nd, burning torch air hose 83, plug ignition mouthfuls 811, the outlet of burning torch Gas Pipe, burning torch air pipe outlets are arranged at the At one gas-blowing outlets 21, burning torch Gas Pipe 82, the afterbody of burning torch air hose 83 are respectively equipped with burning torch fuel gas inlet 821, point Firelock air intlet 831.It is using the beneficial effect of above-mentioned technical proposal:Burning torch 8 possesses inside gas injection tracheae 2 Single Gas Pipe, air tubular construction, its excess air coefficient, which enters scope, can realize 0.5-100, for realizing anti-complicated combustion Ambient pressure, the change of air-flow are burnt, it is stable to set up ignition flame.
In other embodiments of the present invention, in order to reach the purpose that flue gas recirculation is better achieved, the first spray The 10%-30% of the export air-fuel mixture of gas outlet 21 gas output, the second gas-blowing outlets 22 export the sky The 40%-80% of gas-fuel mixture gas output, the 3rd gas-blowing outlets 23 export the 10%- of the air-fuel mixture 30% gas output.It is using the beneficial effect of above-mentioned technical proposal:Each gas-blowing outlets are provided by the construction of each gas-blowing outlets Corresponding gas output, to realize flue gas recirculation, it is ensured that the low emission of nitrogen oxides.
In other embodiments of the present invention, in order to reach the purpose for realizing cool flame, second gas-blowing outlets 22 With the distance between the 3rd gas-blowing outlets 23 are the diameter of gas injection tracheae 2 2-4 times;The diameter of heated object 1 (Φ B) is gas injection 2-4 times of the diameter of tracheae 2 (Φ A).It is using the beneficial effect of above-mentioned technical proposal:Suitably sized Proportionality design, is more easy to reality Existing cool flame, it is ensured that burning it is abundant and efficient, realize minimum discharge.
In other embodiments of the present invention, in order to reach purpose that air and fuel are fully premixed, combustion gas injection The tail end of pipe 2 is connected with premix case 3, and premix one end of case 3 is connected with air supply pipe 5, and Venturi tube 4 is provided with premix case 3, The big opening end of Venturi tube 4 is fitted with the premix inwall of case 3, small openend and the tail end opening phase of gas injection tracheae 2 of Venturi tube 4 Connection, the cavity that the perimeter of Venturi tube 4 is formed with the premix interior zone of case 3 is fuel supply channel, premixes the tank wall of case 3 Fuel supply mouth 6 is provided with by the big opening end of Venturi tube 4, Venturi tube 4 is provided with fuel delivery outlet by the tube wall of small openend 7.It is using the beneficial effect of above-mentioned technical proposal:During the flow section that air is reduced by Venturi tube, there is flow velocity increase Phenomenon, the increase of flow velocity generates suction-operated so that air is more preferable with fuel along with the reduction of air pressure to fuel Ground is pre-mixed.
In other embodiments of the present invention, in order to reach the purpose to form agitation air stream, air supply pipe 5 with Premix case 3 is vertically arranged, and connection transition face is cambered surface.It is using the beneficial effect of above-mentioned technical proposal:So that air is in premix Agitation air-flow is formed in case, can more preferably be premixed with fuel.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow ordinary skill people Member can understand present disclosure and be carried out, and it is not intended to limit the scope of the present invention, all according to the present invention The equivalent change or modification that Spirit Essence is made, should all cover within the scope of the present invention.

Claims (10)

1. a kind of multistage premix burner of low emission cool flame, it is characterised in that including:
Gas injection tracheae, provided with gas-blowing outlets at three, forms burning between the gas injection tracheae perimeter and heated object Room;
Burning torch, its lighting-up tuyere be arranged on gas-blowing outlets at described three it is any one or more.
2. the multistage premix burner of low emission cool flame according to claim 1, it is characterised in that the combustion gas injection tube head The first gas-blowing outlets are provided with the roof in portion, one for working as the air-fuel mixture for flowing through first gas-blowing outlets The first flame is set up when point being ignited, the roof of first flame from the combustion gas injection tube head stretches out, described the One gas-blowing outlets are multiple small through hole, and the small through hole extends arrangement from roof center to circumferential side wall.
3. the multistage premix burner of low emission cool flame according to claim 2, it is characterised in that the combustion gas injection tube head The circumferential side wall in portion is provided with the second gas-blowing outlets, and second gas-blowing outlets flow through described second towards heated object for working as The second flame, described second are set up when a part for the air-fuel mixture of gas-blowing outlets is ignited in the combustion chamber Flame forms stable tip on heated object surface.
4. the multistage premix burner of low emission cool flame according to claim 3, it is characterised in that the gas injection tracheae Circumferential side wall is provided with the 3rd gas-blowing outlets, and the 3rd gas-blowing outlets flow through the 3rd jet towards heated object for working as The 3rd flame, the 3rd flame are set up when a part for the air-fuel mixture of outlet is ignited in the combustion chamber Stable tip is formed on heated object surface.
5. the multistage premix burner of low emission cool flame according to claim 4, it is characterised in that the burning torch is located at institute Gas injection pipe is stated, the burning torch is empty including the spark plug being arranged successively from inside to outside, burning torch Gas Pipe, burning torch Tracheae, the plug ignition mouthful, the outlet of burning torch Gas Pipe, burning torch air pipe outlets are arranged at first jet and gone out At mouthful, the burning torch Gas Pipe, burning torch air hose afterbody are respectively equipped with burning torch fuel gas inlet, burning torch air intlet.
6. the multistage premix burner of low emission cool flame according to claim 4, it is characterised in that first gas-blowing outlets The 10%-30% of air-fuel mixture gas output is exported, second gas-blowing outlets export the air-fuel The 40%-80% of mixture gas output, the 3rd gas-blowing outlets export the 10%-30% of the air-fuel mixture Gas output.
7. the multistage premix burner of low emission cool flame according to claim 6, it is characterised in that second gas-blowing outlets With the distance between the 3rd gas-blowing outlets are the combustion gas injection pipe diameter 2-4 times.
8. the multistage premix burner of low emission cool flame according to claim 7, it is characterised in that a diameter of institute of heated object State combustion gas injection pipe diameter 2-4 times.
9. according to the multistage premix burner of any described low emission cool flames of claim 1-8, it is characterised in that the gas injection Tracheae tail end is connected with premix case, and described premix case one end is connected with air supply pipe, and literary mound is provided with the premix case In manage, the Venturi tube big opening end is fitted with the premix chamber interior wall, the small openend of the Venturi tube and the combustion Gas blowout tracheae tail end opening in communication, the Venturi tube perimeter is with the cavity that is formed of premix case interior zone Fuel supply channel, the premix case tank wall is provided with fuel supply mouth by Venturi tube big opening end, and the Venturi tube is by small The tube wall of openend is provided with fuel delivery outlet.
10. the multistage premix burner of low emission cool flame according to claim 9, it is characterised in that the air supply pipe It is vertically arranged with the premix case, connection transition face is cambered surface.
CN201710260036.7A 2017-04-19 2017-04-19 A kind of multistage premix burner of low emission cool flame Pending CN106949471A (en)

Priority Applications (1)

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CN201710260036.7A CN106949471A (en) 2017-04-19 2017-04-19 A kind of multistage premix burner of low emission cool flame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710260036.7A CN106949471A (en) 2017-04-19 2017-04-19 A kind of multistage premix burner of low emission cool flame

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Publication Number Publication Date
CN106949471A true CN106949471A (en) 2017-07-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3712497A1 (en) * 2019-03-19 2020-09-23 Oilon Technology Oy Burner as well as boiler-burner assembly
US11060721B2 (en) 2019-03-19 2021-07-13 Oilon Technology Oy Burner as well as boiler-burner assembly as well as method for generating a flame into the same
USD932001S1 (en) 2019-07-22 2021-09-28 Oilon Technology Oy Burner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3712497A1 (en) * 2019-03-19 2020-09-23 Oilon Technology Oy Burner as well as boiler-burner assembly
US11060721B2 (en) 2019-03-19 2021-07-13 Oilon Technology Oy Burner as well as boiler-burner assembly as well as method for generating a flame into the same
USD932001S1 (en) 2019-07-22 2021-09-28 Oilon Technology Oy Burner

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