CN102537959B - Rotational flow and direct current combined gas burner - Google Patents
Rotational flow and direct current combined gas burner Download PDFInfo
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- CN102537959B CN102537959B CN201210046363.XA CN201210046363A CN102537959B CN 102537959 B CN102537959 B CN 102537959B CN 201210046363 A CN201210046363 A CN 201210046363A CN 102537959 B CN102537959 B CN 102537959B
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Abstract
The invention discloses a rotational flow and direct current combined gas burner, and belongs to the field of gas burners. The gas burner comprises a burnout air channel with burnout air and a gas channel with a gas fuel, wherein the burnout air channel comprises a central direct current air channel and a peripheral rotational flow air channel; the gas channel comprises a central air inlet channel in the direct current air channel, and a gas nozzle at the front end of the gas channel spouts the gas fuel so as to be mixed with the direct current air in the direct current air channel; and the gas burner also comprises a circumferential inlet channel arranged on the periphery of the rotational flow air channel, and the gas nozzle at the front end of the gas burner spouts the gas fuel so as to be mixed with the rotational flow air in the rotational flow air channel. The gas burner provided by the invention can be used for reducing the adulterate burning difficulty of a high-heating-value gas fuel, when the gas fuel is put into operation, the good commixture and combustion of the gas fuel and air are ensured; and when the gas fuel is off stream, the burnout air function is still completely realized, and the burnout of coat dust and low NOx discharge capacity of the boiler are guaranteed.
Description
Technical field
The invention belongs to gas burner, relate in particular to the gas burner for opposed firing combusting coal fines boiler.
Background technology
When gaseous fuel is when mixing fuel burning and use in coal-burning boiler, if combustion large usage quantity and need put into operation for a long time time need arrange special gas burner.Gaseous fuel is generally divided into two types of high heating value gaseous fuel and low calorific value gas fuels, and gas burner also carries out respective design according to the type of gaseous fuel.In pulverized-coal fired boiler, mix in a large number while burning gaseous fuel, for high heating value gaseous fuel generally on coal burner or coal burner top correct position send in stove; For low calorific value gas fuel generally under coal burner or coal burner bottom correct position send in stove.Current large-sized station boiler mostly is opposed firing burning pattern, adopts vortex burner, and each burner is organized separately air distribution; For reducing emission of NOx of boiler amount, above coal burner, be provided with after-flame wind.Important function due to after-flame wind, when gaseous fuel is stopped transport, the gas burner of setting up also must play the function of former after-flame wind, reduces emission of NOx of boiler amount, guarantees the after-flame of coal dust simultaneously, can't make air distribution mode, structural shape and the operational factor of former after-flame wind change simultaneously.
When mixing the high heating value gaseous fuel that burns larger proportion in this boiler, for meeting various specification requirement gas burners, need be arranged in the top of forward and backward wall coal burner.If gas burner is arranged in separately on after-flame wind, the after-flame of gaseous fuel distance is too short, affects the after-flame of gaseous fuel and may cause curtain wall overtemperature; In addition after the independent air distribution of gas burner, will cause the air quantity of lower coal powder burner to change, affect the normal operation of coal burner.
In addition, during operating on gaseous fuel, due to the completing combustion that gas quantity is large, after-flame wind air quantity can only meet portion gas fuel, the even mixing that adopts traditional structural shape to be difficult to guarantee to enter the front fuel of burner hearth and air, will affect catching fire in time and good after-flame of gaseous fuel.
Summary of the invention
The object of the invention is to: propose a kind of new gas burner, that reduces high heating value gaseous fuel mixes burning difficulty, realizes and in large-scale modern station boiler, mixes the high heating value gaseous fuel that burns larger proportion, realizes the high capacity of high heat value gas burner; Meanwhile, when putting into operation, gaseous fuel can guarantee the good mixing and burning of gaseous fuel and air; When gaseous fuel is stopped transport, still can realize the function of after-flame wind completely, guarantee the after-flame of coal dust and the low NOx drainage amount of boiler.
The object of the invention realizes by following technical proposals:
A kind of eddy flow, direct current are in conjunction with the gas burner of pattern, comprise the after-flame wind passage that is connected with after-flame wind and the blast tube that is connected with gaseous fuel, described after-flame wind passage comprises the direct current wind passage at center and the eddy flow wind passage of periphery, described blast tube comprises the eye of being located in direct current wind passage, its front end gas nozzle ejection gaseous fuel mixes with the direct current wind in direct current wind passage, also comprise the circumferential inlet channel of being located at eddy flow wind passage periphery, its front end gas nozzle ejection gaseous fuel mixes with the eddy flow wind in eddy flow wind passage.
As preferably, the gaseous fuel in described blast tube is in eye and the circumferential allocation proportion in inlet channel, and the allocation proportion with after-flame wind in after-flame wind passage in direct current wind passage and eddy flow wind passage is consistent.
As preferably, the gas nozzle of described circumferential inlet channel is in the circumferential certain angle of inlet channel circumferencial direction deflection, and its gaseous fuel injection direction is consistent with the direction of rotation of eddy flow wind.
As preferably, described direct current wind channel outlet is reducing pattern.
As preferably, described eye gas nozzle comprises radial spray and tiltedly towards the gas nozzle of eye front end central-injection.
The course of work is: the present invention organically combines after-flame wind and gas burner in typical large-scale modern opposed firing combusting coal fines boiler, when gaseous fuel puts into operation, as gas burner, uses, and gaseous fuel is used as combustion exhausted wind apparatus while stopping transport.Meanwhile, the present invention is arranged in gas combustion apparatus among after-flame wind, and gaseous fuel has enough after-flame spaces; And the burning of gaseous fuel utilizes the air distribution of after-flame wind, the air distribution of coal burner can not change, and does not therefore affect the normal operation of coal burner; The design arrangement of equipment is more convenient and easy in addition, and investment cost is less.
Combustion air is divided into two parts, direct current wind centered by a part, and wind speed is higher, can penetrate rising flue gas arrival burner hearth centre and mix with flue gas; A part is the eddy flow wind of periphery, enters the backward surrounding diffusion of burner hearth, mixes with the flue gas of water-cooling wall near zone.While using as after-flame wind, this air distribution pattern can guarantee that after-flame wind evenly mixes with the rising flue gas in burner hearth as much as possible, guarantees the after-flame of coal dust when reducing emission of NOx of boiler amount.
Because the after-flame space that gaseous fuel enters after burner hearth is shorter; And whole air quantity of providing of gas burner can only meet the demand of portion gas fuel combustion, remainder oxygen amount also need the residue oxygen amount in flue gas after the coal dust firing of bottom be supplemented; The inner flue gas of the stove later stage that adds opposed firing burning pattern mixes poor, while very easily there is burning in this case fuel mix with diffusion between oxygen amount badly the combustion process of gaseous fuel in stove can be extended greatly cause efficiency of combustion decline, boiler spray water flux increases and make convection heating surface wall temperature overtemperature.Therefore must guarantee that gaseous fuel can mix as far as possible uniformly with the whole air in gas burner before entering burner hearth, and also can evenly mix with inner flue gas of the stove after entering burner hearth, can catch fire in time and after-flame after making gaseous fuel enter burner hearth.The gaseous fuel for this reason entering in the present invention in gas burner is also divided into two parts, wherein a part adopts circumferential intake method to mix with eddy flow wind, another part adopts air feeding in center mode to mix with direct current wind, and the ratio of two parts gas quantity is consistent with the allocation proportion of burner inward eddy wind and direct current wind air quantity; Like this mist of fuel and air enter also can equally with eddy flow wind with direct current wind be evenly distributed on after burner hearth near burner hearth center and water-cooling wall thereby and inner flue gas of the stove evenly mix, guarantee the after-flame of fuel.
Circumferentially the gas nozzle of air inlet is in the certain angle of circumferencial direction deflection, and the gaseous fuel that makes to spray in eddy flow wind advances along the direction of rotation rotation of air-flow, the air flow structure of rotation is not damaged, and maintains the spin intensity of periphery rotational flow air.The gaseous fuel of air feeding in center is after spraying into direct current wind, and mist makes the mixing of combustion gas and air more even by the reducing of front end, and air-flow spouting velocity, in OK range, can reach burner hearth central area.
Beneficial effect of the present invention:
1. gas burner and after-flame wind unite two into one, what greatly reduce high heating value gaseous fuel mixes burning difficulty, can realize and in large-scale modern station boiler, mix the high heating value gaseous fuel that burns larger proportion, realize the high capacity of high heat value gas burner, easy to utilize.
2. this eddy flow, direct current, in conjunction with the gas burner of pattern, can guarantee the good mixing and burning of gaseous fuel and air when gaseous fuel puts into operation; When gaseous fuel is stopped transport, still can realize the function of after-flame wind completely, guarantee the after-flame of coal dust and the low NOx drainage amount of boiler.
3. for the equipment investment expense increase of newly built construction gas burner itself seldom, the operation of boiler is had no adverse effect.
4. owing to mixing the gaseous fuel of burning, be the unnecessary process byproducts of other unit, the price of selling to applying unit is very low, in the situation that current driving force coal price lattice are more and more higher, mix the high heating value gaseous fuel that burns larger proportion, can be a large amount of fuel costs of applying unit saving.
5. owing to having avoided process byproducts directly to burn or to sky discharge, therefore can avoid energy waste and environmental pollution, bring good social benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the gas nozzle structure schematic diagram of embodiment of the present invention eye;
Fig. 3 is the gas nozzle structure schematic diagram of the circumferential inlet channel of the embodiment of the present invention.
The specific embodiment
Following non-limiting examples is used for illustrating the present invention.
As shown in Figures 1 to 3, a kind of eddy flow, direct current are in conjunction with the gas burner of pattern, comprise the after-flame wind passage that is connected with after-flame wind and the blast tube that is connected with gaseous fuel, after-flame wind passage comprises the direct current wind passage 1 at center and the eddy flow wind passage 2 of periphery, and 1 outlet 11 of direct current wind passage is reducing pattern.Blast tube comprises the eye 3 of being located in direct current wind passage 1, its front end gas nozzle 31 ejection gaseous fuels mix with the direct current wind in direct current wind passage 1, eye 3 middle cavities are for set-point firearm and monitoring device, also comprise the circumferential inlet channel 4 of being located at eddy flow wind passage 2 peripheries, its front end gas nozzle 41 ejection gaseous fuels mix with the eddy flow wind in eddy flow wind passage 2.Eye 3 gas nozzles 31 comprise radial spray and the oblique gas nozzle towards eye 3 front end central-injections.Circumferentially the gas nozzle 41 of inlet channel 4 is in the circumferential certain angle of inlet channel 4 circumferencial direction deflection, and its gaseous fuel injection direction is consistent with the direction of rotation of eddy flow wind.Gas nozzle 31,41 adopts apertures ejection patterns, by higher combustion gas spouting velocity, strengthens mixing of combustion gas and air.Gaseous fuel in blast tube is in eye 3 and the circumferential allocation proportion in inlet channel 4, and the allocation proportion with after-flame wind in after-flame wind passage in direct current wind passage 1 and eddy flow wind passage 2 is consistent.
The 600MW of Yi Mou power plant opposed firing combusting coal fines Boiler Mixed Burning coke-stove gas improvement project is designed and developed this New-type Swirl Flow, direct current is example in conjunction with the gas burner of pattern.When this project coke-stove gas input heat accounts for the full fire coal of boiler, the ratio of total input heat is～12%.10 gas burners liquidate and are arranged on front-back wall water-cooling wall altogether, each 5, every wall.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. the eddy flow for the high heating value gaseous fuel that burns, direct current is in conjunction with the gas burner of pattern, it is characterized in that: comprise the after-flame wind passage that is connected with after-flame wind and the blast tube that is connected with gaseous fuel, described after-flame wind passage comprises the direct current wind passage at center and the eddy flow wind passage of periphery, described blast tube comprises the eye of being located in direct current wind passage, its front end gas nozzle ejection gaseous fuel mixes with the direct current wind in direct current wind passage, also comprise the circumferential inlet channel of being located at eddy flow wind passage periphery, its front end gas nozzle ejection gaseous fuel mixes with the eddy flow wind in eddy flow wind passage.
2. the eddy flow for the high heating value gaseous fuel that burns as claimed in claim 1, direct current are in conjunction with the gas burner of pattern, it is characterized in that: the gaseous fuel in described blast tube is in eye and the circumferential allocation proportion in inlet channel, the allocation proportion with after-flame wind in after-flame wind passage in direct current wind passage and eddy flow wind passage is consistent.
3. the eddy flow for the high heating value gaseous fuel that burns as claimed in claim 1, direct current are in conjunction with the gas burner of pattern, it is characterized in that: the gas nozzle of described circumferential inlet channel is in the circumferential certain angle of inlet channel circumferencial direction deflection, and its gaseous fuel injection direction is consistent with the direction of rotation of eddy flow wind.
4. the eddy flow for the high heating value gaseous fuel that burns as claimed in claim 1, direct current, in conjunction with the gas burner of pattern, is characterized in that: described direct current wind channel outlet is reducing pattern.
5. the eddy flow for the high heating value gaseous fuel that burns as claimed in claim 1, direct current, in conjunction with the gas burner of pattern, is characterized in that: described eye gas nozzle comprises radial spray and tiltedly towards the gas nozzle of eye front end central-injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210046363.XA CN102537959B (en) | 2012-02-28 | 2012-02-28 | Rotational flow and direct current combined gas burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210046363.XA CN102537959B (en) | 2012-02-28 | 2012-02-28 | Rotational flow and direct current combined gas burner |
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| Publication Number | Publication Date |
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| CN102537959A CN102537959A (en) | 2012-07-04 |
| CN102537959B true CN102537959B (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210046363.XA Active CN102537959B (en) | 2012-02-28 | 2012-02-28 | Rotational flow and direct current combined gas burner |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868055B (en) * | 2014-01-28 | 2016-10-05 | 中国科学院过程工程研究所 | A kind of fuel gas with low heat value that is suitable for cuts stream steady combustion heat storage burner compound with direct current |
| CN105318328B (en) * | 2015-01-15 | 2017-11-28 | 上海凌云瑞升燃烧设备有限公司 | The interior more flame low NOX gas burners of circulation |
| CN108180477A (en) * | 2018-02-24 | 2018-06-19 | 陈绪忠 | Bispin multistage purification step-less adjustment burner and heating furnace |
| CN108317510A (en) * | 2018-03-29 | 2018-07-24 | 西安交通大学 | A kind of low NO of remote burnout degree two level eddy flow wide regulating ratioxBurner |
| CN111623346B (en) * | 2020-06-19 | 2024-06-25 | 哈尔滨工业大学 | Cyclone burner for burning high-temperature raw gas |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2415265Y (en) * | 1999-11-11 | 2001-01-17 | 韩大华 | Long Flame oil and gas burner |
| EP1199516A1 (en) * | 2000-10-11 | 2002-04-24 | ALSTOM (Switzerland) Ltd | Burner |
| CN101095012A (en) * | 2004-11-03 | 2007-12-26 | 阿尔斯托姆科技有限公司 | Premix burner |
| CN100473905C (en) * | 2004-02-24 | 2009-04-01 | 西门子公司 | Premix burner and method for combusting a low-calorific gas |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100011770A1 (en) * | 2008-07-21 | 2010-01-21 | Ronald James Chila | Gas Turbine Premixer with Cratered Fuel Injection Sites |
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2012
- 2012-02-28 CN CN201210046363.XA patent/CN102537959B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2415265Y (en) * | 1999-11-11 | 2001-01-17 | 韩大华 | Long Flame oil and gas burner |
| EP1199516A1 (en) * | 2000-10-11 | 2002-04-24 | ALSTOM (Switzerland) Ltd | Burner |
| CN100473905C (en) * | 2004-02-24 | 2009-04-01 | 西门子公司 | Premix burner and method for combusting a low-calorific gas |
| CN101095012A (en) * | 2004-11-03 | 2007-12-26 | 阿尔斯托姆科技有限公司 | Premix burner |
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| CN102537959A (en) | 2012-07-04 |
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