CN206682935U - A kind of low emission cool flame multistage premix burner - Google Patents
A kind of low emission cool flame multistage premix burner Download PDFInfo
- Publication number
- CN206682935U CN206682935U CN201720414951.2U CN201720414951U CN206682935U CN 206682935 U CN206682935 U CN 206682935U CN 201720414951 U CN201720414951 U CN 201720414951U CN 206682935 U CN206682935 U CN 206682935U
- 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.)
- Active
Links
Abstract
The utility model 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 ejects 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, effectively reduces the generation of nitrogen oxides；Unique venturi pre-mixed configuration make it that air, fuel mixing are more abundant；By top adjustment ratio, the burning torch of wide coefficient of excess air scope, it ensure that flame can be established smoothly.
Description
Technical field
A kind of burner is the utility model is related to, particularly a kind of boiler low emission cool flame multistage premix burner.
Background technology
With rapid industrial development, environmental pollution becomes getting worse, 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 need 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 arranges, 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, reduce the oxygen concentration in gaseous mixture, play 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, and less practical, winter temperature is low, can produce condensation
Water, add maintenance difficulty.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of this utility model there is provided a kind of low row simple in construction
Let cool flame multistage premix burner.
To reach above-mentioned purpose, technical scheme is used by the utility model solves its technical problem：
A kind of low emission cool flame multistage premix burner, including：
Gas injection tracheae, provided with gas-blowing outlets at three, 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 establishes 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 established 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 established in combustion chamber, the 3rd flame forms stable tip on heated object surface.
Using above-mentioned preferable scheme, pass through three combustion zones, fractional combustion；Burning torch is located at the first gas-blowing outlets,
First flame produces herein, extends when lighting between center and periphery edge, to keep lighting for the second flame of separation；
The second flame (main fire) after first flame produces at the second gas-blowing outlets is ignited；When main fiery increased flow capacity, the 3rd
The 3rd flame at gas-blowing outlets produces, and forms petal flame；Second flame (main fire) sprays at a high speed from the second gas-blowing outlets
Go out, touch heated object 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
Spark plug, burning torch Gas Pipe, the burning torch air hose being arranged, the plug ignition mouth, 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 preferable scheme, burning torch is located at gas injection pipe, possesses single Gas Pipe, air hose knot
Structure, its excess air coefficient λ scopes can realize 0.5-100, for realizing the change of anti-complicated burning situation air pressure, air-flow,
It is stable to establish 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 preferable 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 preferable scheme, suitably sized Proportionality design, it is more easy to realize cool flame, ensures the abundant and high 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
Connection, described premix are provided with Venturi tube in case, the Venturi tube big opening end is bonded 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 provided with combustion by Venturi tube big opening end
Expect supply mouth, the Venturi tube is provided with fuel delivery outlet by the tube wall of small openend.
Using above-mentioned preferable 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 so that air preferably enters with fuel along with the reduction of air pressure to 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 preferable scheme so that air forms agitation air-flow in premix case, can be carried out with fuel more preferable
Premix.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model；
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 ignition mouths；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 utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
In order to reach the purpose of this utility model, as shown in figure 1, a kind of embodiment of the present utility model is：It is a kind of low
Cool flame multistage premix burner, including gas injection tracheae 2, burning torch 8 are discharged, gas injection tracheae 2 is provided with gas-blowing outlets at three, combustion
Combustion chamber is formed between the perimeter of gas blowout tracheae 2 and heated object 1；The lighting-up tuyere of burning torch 8 is arranged on jet at described three and gone out
Mouthful it is any one or more.
It is using the beneficial effect of above-mentioned technical proposal：By three combustion zones, fractional combustion, nitrogen oxidation is effectively reduced
The generation of thing.
As Figure 2-3, in other embodiments of the present utility model, in order to reach flue gas recirculation, to realize
The purpose of low emission, the first gas-blowing outlets 21 are provided with the roof on the head of gas injection tracheae 2, for when flowing through the first gas-blowing outlets
A part for 21 air-fuel mixture establishes the first flame 211 when being ignited, the first flame 211 is from gas injection tracheae 2
The roof in portion stretches out, and the first gas-blowing outlets 21 are multiple small through hole, and the small through hole prolongs from roof center to circumferential side wall
Stretch arrangement；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 towards heated object
1, for being established when flowing through a part for air-fuel mixture for the second gas-blowing outlets 22 and being ignited in the combustion chamber
Second flame 221, the second flame 221 form stable tip on the surface of heated object 1；The circumferential side wall of gas injection tracheae 2 is opened
Have the 3rd gas-blowing outlets 23, the 3rd gas-blowing outlets 23 towards heated object 1, for when flow through the air of the 3rd gas-blowing outlets 23-
The 3rd flame 231 is established when a part for fuel mixture is ignited in the combustion chamber, the 3rd flame 231 is in heated object
1 surface 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 produces herein
It is raw, extend when lighting between center and periphery edge, to keep lighting for the second flame 221 of separation；First flame 211
The second flame 221 (main fire) after generation at the second gas-blowing outlets 22 is 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) ejects from the high speed of the second gas-blowing outlets 22, touches heated object 1 rapidly so that under flame temperature is quick
Drop, touches the flame of refrigerant, is reflected back, form 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 utility model, in order to reach the stable mesh for establishing ignition flame
, burning torch 8 is located inside gas injection tracheae 2, and burning torch 8 includes spark plug 81, the burning torch combustion being arranged successively from inside to outside
Tracheae 82, burning torch air hose 83, plug ignition mouth 811, the outlet of burning torch Gas Pipe, burning torch air pipe outlets are respectively provided with
At the first 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
821st, burning torch air intlet 831.It is using the beneficial effect of above-mentioned technical proposal：Burning torch 8 is in gas injection tracheae 2
Portion, possess single Gas Pipe, air tubular construction, its excess air coefficient, which enters scope, can realize 0.5-100, anti-for realizing
The change of complicated burning situation air pressure, air-flow, it is stable to establish ignition flame.
In other embodiments of the present utility model, in order to reach the purpose that flue gas recirculation is better achieved, the
One gas-blowing outlets 21 export the 10%-30% of air-fuel mixture gas output, and the second gas-blowing outlets 22 export described
The 40%-80% of air-fuel mixture gas output, the 3rd gas-blowing outlets 23 export the air-fuel mixture
10%-30% gas output.It is using the beneficial effect of above-mentioned technical proposal：Each jet is provided by the construction of each gas-blowing outlets
Corresponding gas output is exported, to realize flue gas recirculation, it is ensured that the low emission of nitrogen oxides.
In other embodiments of the present utility model, in order to reach the purpose for realizing cool flame, second jet goes out
The distance between gas-blowing outlets 23 of mouth 22 and the 3rd are 2-4 times of the diameter of gas injection tracheae 2；The diameter of heated object 1 (Φ B) is combustion
2-4 times of the diameter of gas blowout tracheae 2 (Φ A).It is using the beneficial effect of above-mentioned technical proposal：Suitably sized Proportionality design, more
Cool flame easily is realized, ensures the abundant and efficient of burning, realizes minimum discharge.
In other embodiments of the present utility model, in order to reach the purpose that air and fuel fully premix, combustion gas
The tail end of air jet pipe 2 is connected with premix case 3, and premix one end of case 3 is connected with air supply pipe 5, premixes in case 3 and be provided with venturi
Pipe 4, the big opening end of Venturi tube 4 are bonded with the premix inwall of case 3, and small openend and the tail end of gas injection tracheae 2 of Venturi tube 4 are opened
Mouth is connected, and the cavity that the perimeter of Venturi tube 4 is formed with the premix interior zone of case 3 is fuel supply channel, premixes case 3
Tank wall is provided with fuel supply mouth 6 by the big opening end of Venturi tube 4, and Venturi tube 4 is defeated provided with fuel by the tube wall of small openend
Outlet 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
The phenomenon of increase, the increase of flow velocity generate suction-operated so that air and fuel along with the reduction of air pressure to fuel
Preferably it is pre-mixed.
In other embodiments of the present utility model, in order to reach the purpose to form agitation air stream, air supply
Pipe 5 is vertically arranged with premix case 3, and connection transition face is cambered surface.It is using the beneficial effect of above-mentioned technical proposal：So that air exists
Premix and agitation air-flow is formed in case, can more preferably be premixed with fuel.
For above-described embodiment only to illustrate technical concepts and features of the present utility model, its object is to allow the common skill in this area
Art personnel can understand content of the present utility model and be carried out, and can not limit the scope of protection of the utility model with this,
All equivalent change or modifications made according to the utility model Spirit Essence, should all cover in the scope of protection of the utility model
It is interior.
Claims (10)
- A kind of 1. low emission cool flame multistage premix burner, it is characterised in that including：Gas injection tracheae, provided with gas-blowing outlets at three, burning is formed 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. low emission cool flame multistage premix burner 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 of the air-fuel mixture for first gas-blowing outlets ought to be flowed through The first flame is established when point being ignited, the roof of first flame from the combustion gas injection tube head stretches out, and 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. low emission cool flame multistage premix burner 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 Establish the second flame when a part for the air-fuel mixture of gas-blowing outlets is ignited in the combustion chamber, described second Flame forms stable tip on heated object surface.
- 4. low emission cool flame multistage premix burner 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 established 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. low emission cool flame multistage premix burner according to claim 4, it is characterised in that the burning torch is located at institute Gas injection pipe is stated, spark plug, burning torch Gas Pipe, the burning torch that the burning torch includes being arranged successively from inside to outside are empty Tracheae, the plug ignition mouth, 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. low emission cool flame multistage premix burner 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. low emission cool flame multistage premix burner according to claim 6, it is characterised in that second gas-blowing outlets The distance between 3rd gas-blowing outlets are 2-4 times of the combustion gas injection pipe diameter.
- 8. low emission cool flame multistage premix burner 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 any described low emission cool flame multistage premix burners 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 be bonded 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 cavity that the Venturi tube perimeter is formed with the premix case interior zone are Fuel supply channel, the premix case tank wall are 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. low emission cool flame multistage premix burner 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720414951.2U CN206682935U (en) | 2017-04-19 | 2017-04-19 | A kind of low emission cool flame multistage premix burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720414951.2U CN206682935U (en) | 2017-04-19 | 2017-04-19 | A kind of low emission cool flame multistage premix burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206682935U true CN206682935U (en) | 2017-11-28 |
Family
ID=60400453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720414951.2U Active CN206682935U (en) | 2017-04-19 | 2017-04-19 | A kind of low emission cool flame multistage premix burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206682935U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949471A (en) * | 2017-04-19 | 2017-07-14 | 安德森热能科技（苏州）有限责任公司 | A kind of multistage premix burner of low emission cool flame |
| CN108488795A (en) * | 2018-05-21 | 2018-09-04 | 北京联众华禹环保科技有限公司 | A kind of porous nozzles and gas water jacket furnace low NO |
| CN113757646A (en) * | 2021-08-13 | 2021-12-07 | 西安交通大学 | Flue gas recycling combustion system for injecting natural gas and oxygen by using venturi tube |
-
2017
- 2017-04-19 CN CN201720414951.2U patent/CN206682935U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949471A (en) * | 2017-04-19 | 2017-07-14 | 安德森热能科技（苏州）有限责任公司 | A kind of multistage premix burner of low emission cool flame |
| CN106949471B (en) * | 2017-04-19 | 2023-09-01 | 安德森热能科技（苏州）有限责任公司 | Low-emission cold flame multistage premix burner |
| CN108488795A (en) * | 2018-05-21 | 2018-09-04 | 北京联众华禹环保科技有限公司 | A kind of porous nozzles and gas water jacket furnace low NO |
| CN113757646A (en) * | 2021-08-13 | 2021-12-07 | 西安交通大学 | Flue gas recycling combustion system for injecting natural gas and oxygen by using venturi tube |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106949471A (en) | A kind of multistage premix burner of low emission cool flame | |
| CN205592954U (en) | One -level gas injection type low NOx burner | |
| CN107559827B (en) | Ultralow nitrogen gas burner | |
| CN201680364U (en) | Efficient low NOx pulverized coal burner for small and medium-sized industrial boilers | |
| CN206682935U (en) | A kind of low emission cool flame multistage premix burner | |
| CN102966953B (en) | A kind of burner being applicable to ultra-long radiant tube | |
| CN107606613A (en) | The low nitrogen rotational flow gas-fired combustor of flue gas recirculation built in gas-air Accurate Classification | |
| CN104595900A (en) | Low-nitrogen-oxide gas combustor and combustion method of combustor | |
| CN204704817U (en) | A kind of low nitrogen oxide gas burner | |
| CN108870383A (en) | A kind of pulverized-coal fired boiler low NOx combustion system | |
| CN105570890A (en) | Hot flue gas self-circulation type ultra-low NOx combustor | |
| CN207527582U (en) | The low nitrogen rotational flow gas-fired combustor of flue gas recirculation built in gas-air Accurate Classification | |
| CN208901372U (en) | A kind of pulverized-coal fired boiler low NOx combustion system | |
| CN205119061U (en) | Gas fractional combustion ware | |
| CN207065568U (en) | A kind of fuel gas with low heat value burner and hot-blast stove | |
| CN203147763U (en) | Multi-stage fuel flat wall-attached low-NOX-gas flame burner | |
| CN109442411B (en) | Low-nitrogen burner for gas fuel | |
| CN115899688A (en) | Hierarchical gas low NOx burner | |
| CN106196042B (en) | A kind of strong swirl jet burner | |
| CN104154532A (en) | Center air ring concentrated type turbulent burner | |
| CN208418670U (en) | A kind of boiler using burnout degree technology | |
| CN201875702U (en) | Coal burner and boiler | |
| CN208139261U (en) | A kind of ultralow oxides of nitrogen gas burner of smoke backflow | |
| CN208832443U (en) | A kind of grading bamboo precombustion chamber coal burner | |
| CN207247203U (en) | The more level air-distributions of industrial combustion gas kiln are oxygen-enriched with burning burner special |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |