CN205504984U - Gas recirculation low NOx burner in gas injection type stove - Google Patents

Gas recirculation low NOx burner in gas injection type stove Download PDF

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Publication number
CN205504984U
CN205504984U CN201620270780.6U CN201620270780U CN205504984U CN 205504984 U CN205504984 U CN 205504984U CN 201620270780 U CN201620270780 U CN 201620270780U CN 205504984 U CN205504984 U CN 205504984U
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CN
China
Prior art keywords
air
gas
injector
combustion
gun
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.)
Expired - Fee Related
Application number
CN201620270780.6U
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Chinese (zh)
Inventor
龚永贵
邹方明
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.)
High Smart Beijing Esandepe Co ltd
Beijing Jiadechang Technology Co ltd
Original Assignee
High Smart Beijing Esandepe Co ltd
Beijing Jiadechang Technology 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.)
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Publication date
Application filed by High Smart Beijing Esandepe Co ltd, Beijing Jiadechang Technology Co ltd filed Critical High Smart Beijing Esandepe Co ltd
Priority to CN201620270780.6U priority Critical patent/CN205504984U/en
Application granted granted Critical
Publication of CN205504984U publication Critical patent/CN205504984U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a gas recirculation low NOx burner in gas injection type stove. This combustor comprises the fuel gas jetting device at rear portion, the combustion -supporting wind device and the anterior ejector device at middle part, fuel gas jetting device includes the gaseous ring to and a plurality of air guns of setting on the gaseous ring lateral surface, combustion -supporting wind device includes the air inlet adjusting the bezel of two upper and lower settings, the ejector device includes that the ejector is able to bear or endure firebrick, and the resistant firebrick of ejector goes up equipartition round flue gas and enters the mouth, flue gas entry and the inside intercommunication of furnace, the resistant firebrick's of ejector inboard is equipped with the ejector sealing ring, the one side and the flue gas entry intercommunication of ejector sealing ring, the opposite side forms confined space with outer loop air gun shower nozzle, and the front end of outer loop air gun shower nozzle inserts in the ejector sealing ring. The utility model discloses in, improved in the stove recirculated flue gas 's phegmal reflux again, greatly reduced the nitrogen oxide who produces during the burning, reduced nitrogen oxide's emission, avoid environmental pollution.

Description

A kind of combustion gas injection type inner flue gas of the stove recirculation low NO
Technical field
This utility model relates to industrial furnace field of combustion technology, particularly relates to a kind of combustion gas injection type low nitrogen of inner flue gas of the stove recirculation Burner.
Background technology
Burner is the parts that mainly comprise of industrial furnace combustion apparatus, and the NOx generated in combustion process causes environmental pollution One of principal element, the height of NOx generation amount becomes one of important indicator weighing burner combustion performance.
In existing industrial technology, the generation of NOx mainly has three kinds: fuel type NOx, thermal NO x and Quick-type NOx. The NOx generated during gas fuel combustion is mainly fuel type NOx and thermal NO x, therefore, fires for burning gases Material controls NOx and generates the NOx reduction generating or having generated mainly controlling thermal NO x and fuel type NOx.Temperature Spending the generation to thermal NO x and have decisive role, different burners produces different calorific intensity distributions in combustor, Different calorific intensity distributions produce different Temperature Distribution, therefore design a novel burner make its can meet fuel fire and The needs of burning can reduce again the generation of NOx and become the key realizing low NOx drainage.
Existing industrial gas furnace flue gas recirculation is to send in stove by flue gas, and structure complicates, and is using difficulty of catching fire Fuel time, and flame holding low by furnace temperature is limited, thus can affect reduce NOx effect, it is impossible to meet phase Close the requirement of environmental protection standard.
Currently used low NOx combusting technology mainly has three kinds: the first is air staged combustion technology, and it makes combustion air divide Flow to set up the first combustion zone of oxygen deprivation, thus reduce the generation of NOx, in the second combustion zone, remaining partial air is introduced, Thus complete whole combustion process;The second is fuel-staged combustion technology, and combustion air is once fully incorporated the first combustion zone, But in the first combustion zone only for answering part of fuel, residual fuel is introduced into the second combustion zone, the oxygen utilizing the first combustion zone superfluous enters Row burning;The third is flue gas recirculation combustion technology, is sent into by part low-temperature flue gas in stove, because flue gas absorbs heat and dilutes oxygen Concentration, reduces partial combustion temperature and forms local reduction atmosphere, thus reducing the generation of NOx.Existing three kinds of low NOx All there is the problem of localized hyperthermia and/or combustion instability in combustion technology, therefore, designs the low NOx of a kind of applicable commercial Application Burner has great importance.
Utility model content
This utility model provides a kind of combustion gas injection type inner flue gas of the stove recirculation low NO, overcomes existing burner NOx Discharge capacity is big, and in stove, flue gas recycled capacity of returns is low, easily produces localized hyperthermia and/or the problem of combustion instability.
The purpose of this utility model is achieved through the following technical solutions:
A kind of combustion gas injection type inner flue gas of the stove recirculation low NO, it is characterised in that: this burner is by the fuel gas injection at rear portion The injector device composition of device, the combustion air device at middle part and front portion, wherein said fuel gas ejecting device includes compression ring, and The multiple air guns being arranged on compression ring lateral surface, described air gun is connected with compression ring by pipeline;Described combustion air device includes two Air inlet adjustment baffle plate setting up and down, combustion air enters in air distribution body by air inlet adjustment baffle plate, the outlet air end peace of described air distribution body Dress cyclone and injector device;Described injector device includes that injector refractory brick, described injector refractory brick are arranged on body of heater On, on injector refractory brick, a uniform circle smoke inlet, connects inside described smoke inlet and burner hearth, injector refractory brick interior Side is provided with injector sealing ring, and described injector sealing ring is arranged on the surface of smoke inlet, the side of injector sealing ring and cigarette Gas entrance connects, and opposite side is formed with outer shroud air gun shower nozzle and seals space, and the rear end of described outer shroud air gun shower nozzle is connected with air gun, The front end of outer shroud air gun shower nozzle is inserted in injector sealing ring.
Described burner also includes the central gas gun sprayer being arranged on middle part, and described central gas gun sprayer is through cyclone and rear end Gas pipeline connects.
The pipeline that described air gun is connected with compression ring is provided with spray gun air intake valve.
Described air inlet adjustment baffle plate is arranged at burner air intake vent, and air inlet adjustment baffle plate realizes upset by the handle at rear.
Compared with prior art, this utility model at least has the advantage that
By above-mentioned the technical solution of the utility model, this low NO mainly by fuel staging gun system, injector, join Wind body forms.Main fuel enters compression ring through fuel gas inlet, and in compression ring, each gas gun, center air gun fuel are given in uniform distribution Source is independent to introduce from gas pipeline, and combustion air is entered by combustion gas air inlet adjustment baffle plate, respectively enters centre wind cavity and rotation Stream devices etc., eject and combustion gas diffusive mixing from combustion head.Outer shroud gas gun shower nozzle inserts in injector sealing ring, passes through The high-speed jet that fuel gas injection produces produces certain back pressure, then driven the flue gas in stove by the smoke inlet of injector refractory brick Enter injector sealing ring so that combustion gas premixes in a large number with inner flue gas of the stove, from sealing ring, eject one flue gas through premix Gas mixed with fuel so that fuel is sufficiently mixed with noble gas, also makes mixed gas heating value be reduced. By above means, gas burning velocity in stove, temperature are reduced, thus be substantially reduced the generation of NOx.
Accompanying drawing explanation
Fig. 1 is that the structure master of a kind of combustion gas injection type inner flue gas of the stove recirculation low NO that this utility model embodiment provides regards Figure;
Fig. 2 is the side view of a kind of combustion gas injection type inner flue gas of the stove recirculation low NO that this utility model embodiment provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model, the technical scheme in this utility model is clearly and completely described, Obviously, described embodiment is only a part of embodiment of the present utility model rather than whole embodiments.Based on this reality By the embodiment in novel, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise Execute example, broadly fall into the scope of this utility model protection.
As shown in Figure 1-2, a kind of combustion gas injection type inner flue gas of the stove recirculation low NO proposed for this utility model embodiment, This burner is made up of, wherein the injector device 3 of the fuel gas ejecting device 1 at rear portion, the combustion air device 2 at middle part and front portion Fuel gas ejecting device 1 includes compression ring 4, and is arranged on the multiple air guns 5 on compression ring 4 lateral surface, and air gun 5 is by pipeline and gas Ring 4 connects;Combustion air device 2 includes two air inlet adjustment baffle plates 6 setting up and down, and combustion air passes through air inlet adjustment baffle plate 6 Entering in air distribution body 7, the outlet air end of air distribution body 7 installs cyclone 8 and injector device 3;Injector device 3 includes injection Device refractory brick 9, injector refractory brick 9 is arranged on body of heater, a uniform circle smoke inlet 10, flue gas on injector refractory brick 9 Entrance 10 is internal with burner hearth to be connected, and the inner side of injector refractory brick 9 is provided with injector sealing ring 11, and injector sealing ring 11 is pacified Being contained in the surface of smoke inlet 10, the side of injector sealing ring 11 connects with smoke inlet 10, and opposite side sprays with outer shroud air gun 12 are formed and seal spaces, and the rear end of outer shroud air gun shower nozzle 12 is connected with air gun 5, and the front end insertion of outer shroud air gun shower nozzle 12 is drawn In emitter sealing ring 11.
Preferably, burner also includes the central gas gun sprayer 13 being arranged on middle part, and central gas gun sprayer 13 is through cyclone 8 It is connected with the gas pipeline of rear end.
Preferably, the pipeline that air gun 5 is connected with compression ring 4 is provided with spray gun air intake valve 14.
Preferably, air inlet adjustment baffle plate 6 is arranged at burner air intake vent, and air inlet adjustment baffle plate 6 is realized by the handle at rear Upset.
The function declaration of each structure above-mentioned to the present invention is as follows below in conjunction with the accompanying drawings:
Air distribution body 7: for the shell body of burner, walk the air distribution of whole burner;
Compression ring 4: fuel uses fractional combustion, needs many spray guns, then fuel gas inlet uses unified compression ring distribution combustion gas, each Gas gun takes gas from compression ring, and combustion gas distributed uniform pressure is uniform;
Air gun 5: each fuel gas injection rifle after fuel staging;
Spray gun air intake valve 14 a: hand stop valve before each fuel gas injection rifle, can realize gas gun and dismantle online, also Can realize turning off, thus realize regulating the effect of load;
Air inlet adjustment baffle plate 6: the regulation panel turnover mechanism of burner air intake vent, scalable combustion air amount size;
Injector refractory brick 9: the refractory brick being arranged on body of heater, the uniform circle annular mouth of this refractory brick, negotiable flue gas;
Smoke inlet 10: perforate on refractory brick, and arrange a circle, it being used for the flue gas that circulates, this entrance is overall exposed at stove burner hearth In;
Outer shroud air gun shower nozzle 12: the shower nozzle on Fuel lance, this shower nozzle injection high-speed fuel gas, meanwhile, the jet priming cigarette of combustion gas Flue gas outside gas entrance enters sealing ring, so that combustion gas mixes with flue gas;
Central gas gun sprayer 13: the central gas gun sprayer in fuel staging, this shower nozzle is used for producing flame of centre, ensures burner Stable burning, and play the purpose that flame of centre is stable.
Compared with prior art, this utility model at least has the advantage that
By above-mentioned the technical solution of the utility model, this low NO mainly by fuel staging gun system, injector, join Wind body forms.Main fuel enters compression ring through fuel gas inlet, and in compression ring, each gas gun, center air gun fuel are given in uniform distribution Source is independent to introduce from gas pipeline, and combustion air is entered by combustion gas air inlet adjustment baffle plate, respectively enters centre wind cavity and rotation Stream devices etc., eject and combustion gas diffusive mixing from combustion head.Outer shroud gas gun shower nozzle inserts in injector sealing ring, passes through The high-speed jet that fuel gas injection produces produces certain back pressure, then driven the flue gas in stove by the smoke inlet of injector refractory brick Enter injector sealing ring so that combustion gas premixes in a large number with inner flue gas of the stove, from sealing ring, eject one flue gas through premix Gas mixed with fuel so that fuel is sufficiently mixed with noble gas, also makes mixed gas heating value be reduced. By above means, gas burning velocity in stove, temperature are reduced, thus be substantially reduced the generation of NOx.
The above, only this utility model preferably detailed description of the invention, but protection domain of the present utility model is not limited to This, any those familiar with the art in the technical scope that this utility model discloses, the change that can readily occur in or Replace, all should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model should be wanted with right The protection domain seeking book is as the criterion.

Claims (4)

1. a combustion gas injection type inner flue gas of the stove recirculation low NO, it is characterised in that: this burner is by the gas injection at rear portion The injector device composition of injection device, the combustion air device at middle part and front portion, wherein said fuel gas ejecting device includes compression ring, with And the multiple air guns being arranged on compression ring lateral surface, described air gun is connected with compression ring by pipeline;Described combustion air device includes two Individual air inlet adjustment baffle plate setting up and down, combustion air enters in air distribution body by air inlet adjustment baffle plate, the outlet air end of described air distribution body Cyclone and injector device are installed;Described injector device includes that injector refractory brick, described injector refractory brick are arranged on stove On body, a uniform circle smoke inlet on injector refractory brick, described smoke inlet is internal with burner hearth to be connected, injector refractory brick Inner side is provided with injector sealing ring, and described injector sealing ring is arranged on the surface of smoke inlet, the side of injector sealing ring with Smoke inlet connects, and opposite side is formed with outer shroud air gun shower nozzle and seals space, and the rear end of described outer shroud air gun shower nozzle is connected with air gun, The front end of outer shroud air gun shower nozzle is inserted in injector sealing ring.
2. combustion gas injection type inner flue gas of the stove recirculation low NO as claimed in claim 1, it is characterised in that: described burning Device also includes the central gas gun sprayer being arranged on middle part, and described central gas gun sprayer is connected through cyclone with the gas pipeline of rear end.
3. combustion gas injection type inner flue gas of the stove recirculation low NO as claimed in claim 1, it is characterised in that: described air gun The pipeline being connected with compression ring is provided with spray gun air intake valve.
4. combustion gas injection type inner flue gas of the stove recirculation low NO as claimed in claim 1, it is characterised in that: described air intake Controllable register is arranged at burner air intake vent, and air inlet adjustment baffle plate realizes upset by the handle at rear.
CN201620270780.6U 2016-04-01 2016-04-01 Gas recirculation low NOx burner in gas injection type stove Expired - Fee Related CN205504984U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620270780.6U CN205504984U (en) 2016-04-01 2016-04-01 Gas recirculation low NOx burner in gas injection type stove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620270780.6U CN205504984U (en) 2016-04-01 2016-04-01 Gas recirculation low NOx burner in gas injection type stove

Publications (1)

Publication Number Publication Date
CN205504984U true CN205504984U (en) 2016-08-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105570890A (en) * 2016-03-15 2016-05-11 河南方圆工业炉设计制造有限公司 Hot flue gas self-circulation type ultra-low NOx combustor
CN108758623A (en) * 2018-05-08 2018-11-06 清华大学 A kind of oil-gas two-way burner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105570890A (en) * 2016-03-15 2016-05-11 河南方圆工业炉设计制造有限公司 Hot flue gas self-circulation type ultra-low NOx combustor
CN108758623A (en) * 2018-05-08 2018-11-06 清华大学 A kind of oil-gas two-way burner
CN108758623B (en) * 2018-05-08 2019-09-20 清华大学 A kind of oil-gas two-way burner

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160824

Termination date: 20180401

CF01 Termination of patent right due to non-payment of annual fee