CN102537959A - Rotational flow and direct current combined gas burner - Google Patents
Rotational flow and direct current combined gas burner Download PDFInfo
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- CN102537959A CN102537959A CN201210046363XA CN201210046363A CN102537959A CN 102537959 A CN102537959 A CN 102537959A CN 201210046363X A CN201210046363X A CN 201210046363XA CN 201210046363 A CN201210046363 A CN 201210046363A CN 102537959 A CN102537959 A CN 102537959A
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- direct current
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- eddy flow
- wind
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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 that is used for front-back wall opposed firing pulverized-coal fired boiler.
Background technology
When gaseous fuel when mixing fuel burning and in coal-burning boiler, use, if combustion large usage quantity and need put into operation for a long time the time need be provided with special gas burner.Gaseous fuel generally is 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 when burning gaseous fuel, for high heating value gaseous fuel generally on coal burner or coal burner top correct position send in the stove; For low calorific value gas fuel generally under coal burner or coal burner bottom correct position send in the stove.Mostly present large-sized station boiler is front-back wall opposed firing pattern, adopts vortex burner, and each burner is organized air distribution separately; For reducing boiler NOx discharge capacity, above coal burner, be provided with after-flame wind.Because the important function of 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 boiler NOx discharge capacity, guarantees the after-flame of coal dust simultaneously air distribution mode, structural shape and the operational factor of former after-flame wind are changed simultaneously.
When in this boiler, mixing the high heating value gaseous fuel that burns larger proportion, need be arranged in the top of forward and backward wall coal burner for satisfying various specification requirement gas burners.If gas burner is arranged in separately on the after-flame wind, then the after-flame of gaseous fuel distance is too short, influences the after-flame of gaseous fuel and possibly cause the curtain wall overtemperature; To cause the air quantity of lower coal powder burner to change behind the independent air distribution of gas burner in addition, influence the normal operation of coal burner.
In addition; When using gaseous fuel; Because the completing combustion that gas quantity is big, after-flame wind air quantity can only satisfy portion gas fuel, the even mixing of adopting traditional structural shape to be difficult to guarantee to get into preceding fuel of burner hearth and air will influence in time catching fire and good after-flame of gaseous fuel.
Summary of the invention
The objective of the invention is to: propose a kind of new gas burner, that reduces high heating value gaseous fuel mixes the burning difficulty, is implemented in and mixes the high heating value gaseous fuel that burns larger proportion in the large-scale modern station boiler, realizes the high capacity of high heat value gas burner; Simultaneously,, gaseous fuel can guarantee the well-mixed and the burning of gaseous fuel and air when putting into operation; When gaseous fuel is stopped transport, still can realize the function of after-flame wind fully, guarantee the after-flame of coal dust and the low NOx drainage amount of boiler.
The object of the invention realizes through following technical proposals:
A kind of eddy flow, direct current combine the gas burner of pattern; Comprise after-flame wind passage that is connected with after-flame wind and the blast tube that is connected with gaseous fuel; Said after-flame wind passage comprises the direct current wind passage at center and the eddy flow wind passage of periphery; Said blast tube comprises the eye of being located in the direct current wind passage; Its front end gas nozzle ejection gaseous fuel mixes with direct current wind in the direct current wind passage, also comprises the circumferential inlet channel of being located at eddy flow wind passage periphery, and its front end gas nozzle sprays gaseous fuel to be mixed with eddy flow wind in the eddy flow wind passage.
As preferably, the allocation proportion of the gaseous fuel in the said blast tube in eye and circumferential inlet channel is consistent with the allocation proportion of after-flame wind in direct current wind passage and eddy flow wind passage in the after-flame wind passage.
As preferably, the gas nozzle of said 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, said direct current wind channel outlet is the reducing pattern.
As preferably, said eye gas nozzle comprise radial spray with 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 front-back wall opposed firing pulverized-coal fired boiler, uses as gas burner when gaseous fuel puts into operation, and uses as combustion exhausted wind apparatus when gaseous fuel is stopped transport.Simultaneously, the present invention is arranged in gas combustion apparatus among the after-flame wind, and then gaseous fuel has enough after-flame spaces; And the burning of gaseous fuel utilizes the air distribution of after-flame wind, and the air distribution of coal burner can not change, and therefore do not influence the normal operation of coal burner; The Equipment Design layout is more convenient and easy in addition, and investment cost is littler.
Combustion air is divided into two parts, and a part is a center direct current wind, 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, to diffusion all around, mixes with the flue gas of water-cooling wall near zone behind the entering burner hearth.When using as after-flame wind, this air distribution pattern can guarantee after-flame wind as much as possible with burner hearth in the rising flue gas evenly mix, when reducing boiler NOx discharge capacity, guarantee the after-flame of coal dust.
Because the after-flame space that gaseous fuel gets into behind the burner hearth is shorter; And whole air quantity of providing of gas burner can only satisfy the demand of portion gas fuel combustion, and remainder oxygen amount also needs replenished by the residual oxygen amount in the flue gas behind the coal dust firing of bottom; The inner flue gas of the stove later stage that adds front-back wall opposed firing pattern mixes relatively poor, and fuel mixes with diffusion between the oxygen amount and badly the combustion process of gaseous fuel in stove can be prolonged greatly cause efficiency of combustion decline, the increase of boiler spray water flux and make convection heating surface wall temperature overtemperature when very easily burning occurring in this case.Therefore must guarantee that gaseous fuel can mix with the whole air in the gas burner as far as possible uniformly before getting into burner hearth, and behind the entering burner hearth, also can evenly mix, can in time catch fire and after-flame after making gaseous fuel entering burner hearth with inner flue gas of the stove.The gaseous fuel that for this reason gets in the gas burner among the present invention also is divided into two parts; Wherein a part adopts circumferential intake method to mix with eddy flow wind; Another part adopts the center intake method to mix with direct current wind, and the ratio of two parts gas quantity is consistent with the allocation proportion of interior eddy flow wind of burner and direct current wind air quantity; Like this fuel and Air mixing gas get into also can equally with direct current wind be evenly distributed on behind the burner hearth near burner hearth center and the water-cooling wall with eddy flow wind thereby and inner flue gas of the stove evenly mix the after-flame of assurance fuel.
Circumferentially the gas nozzle of air inlet makes the gaseous fuel that sprays in the eddy flow wind advance along the direction of rotation rotation of air-flow in the certain angle of circumferencial direction deflection, and the air flow structure to rotation does not damage, and keeps the spin intensity of periphery rotational flow air.The gaseous fuel of center air inlet is after spraying into direct current wind, and the reducing of mist through front end makes combustion gas and Air mixing more even, and the air-flow spouting velocity can reach the burner hearth central area in OK range.
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 the burning difficulty; Can be implemented in and mix the high heating value gaseous fuel that burns larger proportion in the large-scale modern station boiler, realize the high capacity of high heat value gas burner, easy to utilize.
2. this eddy flow, direct current combine the gas burner of pattern, when gaseous fuel puts into operation, can guarantee the well-mixed and the burning of gaseous fuel and air; When gaseous fuel is stopped transport, still can realize the function of after-flame wind fully, 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 to boiler has no adverse effect.
4. owing to the gaseous fuel of mixing burning is the unnecessary process byproducts of other unit; The price of selling to applying unit is very low; Under the increasingly high situation of current driving force coal price lattice, 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, therefore can having avoided energy waste and environmental pollution, bring good social benefit to the sky discharging.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the gas nozzle structure sketch map of embodiment of the invention eye;
Fig. 3 is the gas nozzle structure sketch map of the circumferential inlet channel of the embodiment of the invention.
The specific embodiment
Following non-limiting examples is used to explain the present invention.
Shown in Fig. 1 to 3; A kind of eddy flow, direct current combine the gas burner of pattern; Comprise that 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 comprise the direct current wind passage 1 at center and the eddy flow wind passage 2 of periphery, 1 outlet 11 of direct current wind passage is the reducing pattern.Blast tube comprises the eye of being located in the direct current wind passage 13; Its front end gas nozzle 31 ejection gaseous fuels mix with direct current wind in the direct current wind passage 1; Eye 3 middle cavities are used 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 eddy flow wind in the eddy flow wind passage 2.Eye 3 gas nozzles 31 comprise radial spray and 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 deflections, and its gaseous fuel injection direction is consistent with the direction of rotation of eddy flow wind.Gas nozzle 31,41 adopts holes in spraying to go out pattern, strengthens combustion gas and Air mixing through higher combustion gas spouting velocity.The allocation proportion of gaseous fuel in the blast tube in eye 3 and circumferential inlet channel 4 is consistent with allocation proportion in the eddy flow wind passage 2 at direct current wind passage 1 with after-flame wind in the after-flame wind passage.
Mix with certain 600MW of power plant front-back wall opposed firing pulverized-coal fired boiler and to burn the producer gas improvement project and design and develop this New-type Swirl Flow, direct current to combine the gas burner of pattern be example.This project coke-stove gas input heat account for boiler complete when coal-fired the ratio of total input heat be～12%.10 gas burners liquidate and are arranged on the front-back wall water-cooling wall altogether, each 5 on every wall.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. an eddy flow, direct current combine the gas burner of pattern; It is characterized in that: comprise after-flame wind passage that is connected with after-flame wind and the blast tube that is connected with gaseous fuel; Said after-flame wind passage comprises the direct current wind passage at center and the eddy flow wind passage of periphery; Said blast tube comprises the eye of being located in the direct current wind passage; Its front end gas nozzle ejection gaseous fuel mixes with direct current wind in the direct current wind passage, also comprises the circumferential inlet channel of being located at eddy flow wind passage periphery, and its front end gas nozzle sprays gaseous fuel to be mixed with eddy flow wind in the eddy flow wind passage.
2. eddy flow as claimed in claim 1, direct current combine the gas burner of pattern; It is characterized in that: the allocation proportion of the gaseous fuel in the said blast tube in eye and circumferential inlet channel is consistent with the allocation proportion of after-flame wind in direct current wind passage and eddy flow wind passage in the after-flame wind passage.
3. eddy flow as claimed in claim 1, direct current combine the gas burner of pattern; It is characterized in that: the gas nozzle of said 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. eddy flow as claimed in claim 1, direct current combine the gas burner of pattern, and it is characterized in that: said direct current wind channel outlet is the reducing pattern.
5. eddy flow as claimed in claim 1, direct current combine the gas burner of pattern, it is characterized in that: said eye gas nozzle comprises radial spray and oblique gas nozzle towards 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 true CN102537959A (en) | 2012-07-04 |
| CN102537959B 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868055A (en) * | 2014-01-28 | 2014-06-18 | 中国科学院过程工程研究所 | Regenerative combustion device applicable to stable combustion of compounded tangent-flow and direct-flow gas with low calorific value |
| CN105318328A (en) * | 2015-01-15 | 2016-02-10 | 上海凌云瑞升燃烧设备有限公司 | Internal circulation multi-flame low nitrogen oxide (NOX) fuel gas burner |
| 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 |
| CN111623346A (en) * | 2020-06-19 | 2020-09-04 | 哈尔滨工业大学 | Cyclone burner using high-temperature raw gas |
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| 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 |
| US20100011770A1 (en) * | 2008-07-21 | 2010-01-21 | Ronald James Chila | Gas Turbine Premixer with Cratered Fuel Injection Sites |
-
2012
- 2012-02-28 CN CN201210046363.XA patent/CN102537959B/en active Active
Patent Citations (5)
| 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 |
| US20100011770A1 (en) * | 2008-07-21 | 2010-01-21 | Ronald James Chila | Gas Turbine Premixer with Cratered Fuel Injection Sites |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868055A (en) * | 2014-01-28 | 2014-06-18 | 中国科学院过程工程研究所 | Regenerative combustion device applicable to stable combustion of compounded tangent-flow and direct-flow gas with low calorific value |
| 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 |
| CN105318328A (en) * | 2015-01-15 | 2016-02-10 | 上海凌云瑞升燃烧设备有限公司 | Internal circulation multi-flame low nitrogen oxide (NOX) fuel gas burner |
| 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 |
| CN111623346A (en) * | 2020-06-19 | 2020-09-04 | 哈尔滨工业大学 | Cyclone burner using high-temperature raw gas |
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| Publication number | Publication date |
|---|---|
| CN102537959B (en) | 2014-08-27 |
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