CN102607025A - Gas back-jetting pre-mixing low-NOx combustion apparatus and combustion method of combustion apparatus - Google Patents
Gas back-jetting pre-mixing low-NOx combustion apparatus and combustion method of combustion apparatus Download PDFInfo
- Publication number
- CN102607025A CN102607025A CN2012100752061A CN201210075206A CN102607025A CN 102607025 A CN102607025 A CN 102607025A CN 2012100752061 A CN2012100752061 A CN 2012100752061A CN 201210075206 A CN201210075206 A CN 201210075206A CN 102607025 A CN102607025 A CN 102607025A
- Authority
- CN
- China
- Prior art keywords
- gas
- combustion
- combustion gas
- spray
- combustion apparatus
- 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
Links
Images
Abstract
The invention discloses a gas back-jetting pre-mixing low-NOx combustion apparatus and a combustion method of the combustion apparatus, which belongs to the technical field of a high-power industrial combustor. The combustion apparatus is characterized in that: a centre cylinder is axially arranged at a throat opening centre; the end part of the centre cylinder is connected with a whirlcone which is coaxially arranged; an inner diameter and an outer diameter of the centre cylinder are consistent with the inner diameter and the outer diameter of an inner ring of the whirlcone; a peripheral axial wind channel is arranged between the periphery of the outer ring of the whirlcone and the inner wall of a throat opening; back-jetting hammer gas guns are radically distributed on the throat opening. The combustion method of the combustion apparatus is characterized in that: the gas is divided into two parts, namely the gas which is jet from a straight back-jetting hole, is backwards jet in an axial direction and rushes with axial wind at the periphery oppositely, and gas which is jet from an inclined back-jetting hole and rushes tangentially with swirl wind, after the gas enters the channel from a combustible gas hammer-type gas gun. The gas back-jetting pre-mixing low-NOx combustion apparatus disclosed by the invention has the beneficial effects that: the gas and the air are jet and oppositely rushed to be fully and uniformly mixed, so that a little of NOx smaller than 29ppm is generated without generation of CO (carbonic oxide). The combustion is stable and reliable, and the highest power of a single machine can be up to over 70MW.
Description
Technical field
The present invention relates to high-power industrial burner with the gas burner technology, relate in particular to a kind of combustion gas and return spray, flame evenly distributes, produces the high-power premix burner of low emission of even temperature field in the whole space of burner hearth.
Background technology
Along with the raising of domestic environmental requirement, the appearance and the application of low-carbon (LC) low emission, energy-saving and emission-reduction policy have proposed requirements at the higher level to the high power gas burner at aspects such as safety, environmental protection.Traditional general power of domestic gas burner is no more than 21MW, and has combustion instability, discharges problems such as big.Domestic and international most above gas burners of diffusion (non-premix) combustion technology, particularly 7MW that use of gas burner, i.e. combustion gas and combustion air before burning respectively through different channel flow in the combustion chamber, mixed combustion.Such burning form relatively is easy to generate high excess air coefficient, has reduced boiler efficiency; Combustion flame is longer relatively, even takes off fire; Combustion gas and air mix in boiler furnace and inhomogeneously are easy to generate localized hyperthermia and then produce problems such as a large amount of NOx, CO.More than 1536 degree, NOx generates in a large number, and the NOx discharge capacity is relatively than problems such as height under the situation of not using the flue gas outer circulation, and CO then is because the result of the imperfect combustion generation of combustion gas.
Gas burner also has employing flameless combustion technology (premixed combustion technology) abroad, i.e. combustion gas and combustion air mix in a container earlier before getting into the combustion chamber.Such burner combustion temperature equalization; Excess air coefficient is minimum; Burning whole spatial point in the combustion chamber is evenly carried out, and the NOx amount of generation is much lower than diffusion flame burner, but if such burner is improper use or the technology serious problems such as tempering even generation blast that then are easy to generate not in place; Seriously hindered should technology development and application, so external advanced burner producer also only produces such small-power (below the 6MW) gas burner.
Summary of the invention
The objective of the invention is: overcome defectives such as the NOx discharge capacity height that in the past adopts diffusion type (non-premix) combustion technology gas burner to run into, excess air coefficient optimization; On high-power burner, use the premixed combustion technology safely and reliably, provide a kind of combustion gas to return spray formula premix low NOx combustion apparatus and combustion method thereof.
For achieving the above object, the technical scheme of employing is: spray formula premix low NOx combustion apparatus is returned in a kind of combustion gas, comprises cyclone; Return spray set hammer formula gas gun; The burner aditus laryngis is characterized in that: said aditus laryngis center axially is provided with central tube; The upper end of said central tube joins with the cyclone of coaxial setting; The interior external diameter of said central tube is identical consistent with the interior external diameter of the interior ring of said cyclone, is equipped with peripheral axial flow wind passage between the outer shroud periphery of said cyclone and the said aditus laryngis inwall, and said aditus laryngis radial equipartition is equipped with back spray set hammer formula gas gun.
Said time spray set hammer formula gas gun axially is the combustion gas admission passage, and radial outer end is shorter, is equipped with a plurality of combustion gas straight gyrus spray orifices, and is radially inboard, longer, is equipped with a plurality of combustion gas and tiltedly returns spray orifice.Said time every of spray set hammer formula gas gun has 5～16 combustion gas to return spray orifice.
The combustion method of spray formula premix low NOx combustion apparatus is returned in said combustion gas, it is characterized in that:
Combustion air divides three strands: ⑴ is got into by intermediate cylinder, and a small amount of low speed center cooling air mainly plays the effect of cooling root flame; ⑵ get into through cyclone, and middle high-speed rotational wind mainly plays and quickens combustion gas and Air mixing, and the retention flame; ⑶ get into high-speed peripheral axial flow wind from said peripheral axial flow wind passage;
Combustion gas is divided into two parts after the admission passage that returns spray set hammer formula gas gun gets into, the combustion gas of ⑴ combustion gas straight gyrus spray orifice ejection is returned spray vertically and liquidated with peripheral axial flow wind; ⑵ the combustion gas of spray orifice ejection is tiltedly returned in combustion gas, is a α angle with the axis of burner, with eddy flow wind tangential refunds is sprayed.
Good effect of the present invention is: to liquidating, remainder then liquidates with eddy flow wind from the gas-flow part of the fuel gas hole ejection of combustion on the gas gun and axial flow wind facies.Add the momentum of the momentum of unit mass combustion gas, make combustion gas and air in the aditus laryngis of burner, mix full and uniformly with prestissimo greater than combustion air; But combustion gas can not returned and is sprayed onto the burner depths, promptly before aditus laryngis root unburned, has evenly mixed (premix), and gas concentration is almost consistent everywhere; When thereby combustion gas and air mixture spray to burner hearth, can evenly burn in each spatial point, temperature is even in the burner hearth; Avoid the flame temperature peak region in the diffusion combustion mode, and under the prerequisite that guarantees flame stabilization, reduced root flame, thereby suppressed the generation of NOx; Generation is less than the minute quantity NOx of 29ppm, and do not have CO and produce.The excess air that burning needs is little, and boiler efficiency improves, and flameholding is reliable.The single-machine capacity maximum can reach more than the 70MW.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1. be structural representation of the present invention (gas gun is between cyclone and aditus laryngis);
Fig. 2. be the A-A sectional structure sketch map of Fig. 1;
Fig. 3. be the hydrocyclone structure sketch map;
Fig. 4. gas gun header structure sketch map;
Fig. 5. for the B of Fig. 4 to structural representation.
Among the figure, the 1-aditus laryngis; 2-returns spray set hammer formula gas gun; The 3-cyclone; The 4-intermediate cylinder; Ring in the 5-cyclone; The 6-swirler blades; 7-cyclone outer shroud; 8-combustion gas straight gyrus spray orifice; Spray orifice is tiltedly returned in the 9-combustion gas; 10-center cooling air; High-speed rotational wind in the middle of the 11-; 12-periphery axial flow wind; 13-combustion gas admission passage.
The specific embodiment
Fig. 1 is a structural representation of the present invention, and Fig. 2 is the A-A sectional structure sketch map of Fig. 1, by visible shown in the figure; Spray formula premix low NOx combustion apparatus is returned in a kind of combustion gas, comprises cyclone 3, returns spray set hammer formula gas gun 2; Burner aditus laryngis 1 is characterized in that: said aditus laryngis 1 center axially is provided with central tube 4; The end of said central tube 4 joins with the cyclone of coaxial setting 3; The interior external diameter of said central tube 4 is identical consistent with the interior external diameter of the interior ring 5 of said cyclone, is equipped with peripheral axial flow wind passage 12 between the outer shroud periphery of said cyclone 3 and said aditus laryngis 1 inwall, and said aditus laryngis 1 radial equipartition is equipped with back spray set hammer formula gas gun 2.
As shown in the figure; Intermediate cylinder 4 is in the middle of burner, and intermediate cylinder 4 upper ends are fixedly connected with cyclone 3, and low speed center cooling air 10 is axially by flowing out in the intermediate cylinder 4; This part wind accounts for 5～10% of total air, can play cooling root flame and flame of centre action of temperature.Remaining air then is divided into the two large divisions by cyclone 3, and the portion of air high-speed rotational wind 11 in the middle of 6 one-tenth of the cyclones of flowing through account for 35%～45% of total blast volume, and another part is then axially mobile from cyclone 3 outside, becomes peripheral axial flow wind 12.
Fig. 3 is the hydrocyclone structure sketch map.Illustrate this cyclone by interior ring 5, outer shroud 7 and in placing the some swirler blades 6 between ring 5 outer shrouds 7 forms, said blade 6 is to bend plunders shape, is processed by exotic material, ring-type is uniformly distributed with.Streamline vane 6 makes that crushing was little when air passed through, and flow pattern is good, is easy to evenly mix with fuel gas.
Fig. 1 and 2 is visible, some times sprays of aditus laryngis 1 radial equipartition set hammer formula gas gun 2.Fig. 4,5 shows back spray set hammer formula gas gun structural representation, and said time spray set hammer formula gas gun axially is combustion gas admission passage 13, and radial outer end is shorter, is equipped with a plurality of combustion gas straight gyrus spray orifices 8, and radially the inboard is longer, is equipped with a plurality of combustion gas and tiltedly returns spray orifice 9.On every time spray set hammer formula gas gun 2 5～16 fuel gas holes (according to the burner rating size, the quantity in hole is not quite similar) are arranged.Combustion gas is flowed out from these little fuel gas holes, becomes the thin gas-flow of multiply.Combustion gas straight gyrus spray orifice 8 returns spray vertically, liquidates with peripheral axial flow wind 12, and another group combustion gas is tiltedly returned spray orifice 9 through combustion gas, and is not vertical with rifle body cambered surface with axially at an angle, but with middle high-speed rotational wind 11 tangentials that cyclone comes out refunds sprayed.
So all combustion gas all are the shape that liquidates with the combustion air direction, combustion gas can not spray burner throat, more mix equably with combustion air before the unburned to the full extent.And control the momentum of fuel gas hole diameter and ejection well, burning is carried out outside burner throat, in the big as far as possible space of whole burner hearth, burn.Because premix makes combustion gas and combustion air in the even mixed combustion of whole furnace cavity, has avoided the generation of localized hyperthermia, and reduces root flame under the prerequisite that guarantees flame stabilization, thus the feasible NOx that produces minute quantity less than 29ppm, and do not have the CO generation.The excess air that burning needs is little, and boiler efficiency improves, and flameholding is reliable.The single-machine capacity maximum can reach more than the 70MW.
Claims (4)
1. spray formula premix low NOx combustion apparatus is returned in a combustion gas; Comprise cyclone, return spray set hammer formula gas gun, the burner aditus laryngis; It is characterized in that: said aditus laryngis center; Central tube axially is set, and the upper end of said central tube joins with the cyclone of coaxial setting, and the interior external diameter of said central tube coincide consistent with the interior external diameter of the interior ring of said cyclone; Be equipped with peripheral axial flow wind passage between the outer shroud periphery of said cyclone and the said aditus laryngis inwall, said aditus laryngis radial equipartition is equipped with back spray set hammer formula gas gun.
2. spray formula premix low NOx combustion apparatus is returned in said a kind of combustion gas according to claim 1; It is characterized in that: said time spray set hammer formula gas gun axially is the combustion gas admission passage, and radial outer end is shorter, is equipped with a plurality of combustion gas straight gyrus spray orifices; Radially the inboard is longer, is equipped with a plurality of combustion gas and tiltedly returns spray orifice.
3. spray formula premix low NOx combustion apparatus is returned in said a kind of combustion gas according to claim 1, it is characterized in that: said time every of spray set hammer formula gas gun has 5～16 combustion gas to return spray orifice.
4. the combustion method of spray formula premix low NOx combustion apparatus is returned in the said combustion gas of claim 1, it is characterized in that:
Combustion air divides three strands: ⑴ is got into by intermediate cylinder, a small amount of low speed center cooling air, cooling flame root; ⑵ get into through cyclone, and middle high-speed rotational wind quickens combustion gas and Air mixing, the retention flame; ⑶ get into high-speed peripheral axial flow wind from said peripheral axial flow wind passage;
The admission passage of combustion gas spontaneous combustion pneumatic hammer formula gas gun is divided into two parts after getting into, and the combustion gas of ⑴ combustion gas straight gyrus spray orifice ejection is returned spray vertically and liquidated with peripheral axial flow wind; ⑵ the combustion gas of spray orifice ejection is tiltedly returned in combustion gas, is a α angle with the axis of burner, with eddy flow wind tangential refunds is sprayed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100752061A CN102607025A (en) | 2011-12-06 | 2012-03-21 | Gas back-jetting pre-mixing low-NOx combustion apparatus and combustion method of combustion apparatus |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110400579 | 2011-12-06 | ||
| CN201110400579.7 | 2011-12-06 | ||
| CN2012100752061A CN102607025A (en) | 2011-12-06 | 2012-03-21 | Gas back-jetting pre-mixing low-NOx combustion apparatus and combustion method of combustion apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102607025A true CN102607025A (en) | 2012-07-25 |
Family
ID=46524652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100752061A Pending CN102607025A (en) | 2011-12-06 | 2012-03-21 | Gas back-jetting pre-mixing low-NOx combustion apparatus and combustion method of combustion apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102607025A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351925A (en) * | 2015-11-09 | 2016-02-24 | 上海华之邦科技股份有限公司 | Low-emission gas combustion furnace and combustion air preparation method thereof |
| CN106287706A (en) * | 2016-08-31 | 2017-01-04 | 林宇震 | Fuel gas mixing machine |
| CN108518677A (en) * | 2018-05-31 | 2018-09-11 | 西安西热锅炉环保工程有限公司 | A kind of low nitrogen burner |
| CN112344330A (en) * | 2020-11-25 | 2021-02-09 | 江苏蓝创环保科技有限公司 | High-excess-air-coefficient low-nitrogen type integrated combustion device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743735A (en) * | 2005-09-29 | 2006-03-08 | 北京航空航天大学 | Evaporation pipe type miniature-small-sized engine combustion chamber |
| CN101067495A (en) * | 2007-06-12 | 2007-11-07 | 上海诺特飞博燃烧设备有限公司 | Industrial combustor gas fuel and combustion-supporting air supermixing method and device thereof |
| CN101235969A (en) * | 2007-01-31 | 2008-08-06 | 通用电气公司 | Reverse current jet mechanism with coaxial fuel-air passageway |
| CN102003710A (en) * | 2010-12-10 | 2011-04-06 | 上海诺特飞博燃烧设备有限公司 | Low emission high-power staged-combustion gas burner and gas collocation method thereof |
| CN102012025A (en) * | 2010-12-10 | 2011-04-13 | 上海诺特飞博燃烧设备有限公司 | Low-NOx combustor with internal reflux of flue gas and homogeneous combustion and gas configuration method thereof |
| CN202494110U (en) * | 2011-12-06 | 2012-10-17 | 上海诺特飞博燃烧设备有限公司 | Gas spray-back type premixed low-NOx combustion device |
-
2012
- 2012-03-21 CN CN2012100752061A patent/CN102607025A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743735A (en) * | 2005-09-29 | 2006-03-08 | 北京航空航天大学 | Evaporation pipe type miniature-small-sized engine combustion chamber |
| CN101235969A (en) * | 2007-01-31 | 2008-08-06 | 通用电气公司 | Reverse current jet mechanism with coaxial fuel-air passageway |
| CN101067495A (en) * | 2007-06-12 | 2007-11-07 | 上海诺特飞博燃烧设备有限公司 | Industrial combustor gas fuel and combustion-supporting air supermixing method and device thereof |
| CN102003710A (en) * | 2010-12-10 | 2011-04-06 | 上海诺特飞博燃烧设备有限公司 | Low emission high-power staged-combustion gas burner and gas collocation method thereof |
| CN102012025A (en) * | 2010-12-10 | 2011-04-13 | 上海诺特飞博燃烧设备有限公司 | Low-NOx combustor with internal reflux of flue gas and homogeneous combustion and gas configuration method thereof |
| CN202494110U (en) * | 2011-12-06 | 2012-10-17 | 上海诺特飞博燃烧设备有限公司 | Gas spray-back type premixed low-NOx combustion device |
Non-Patent Citations (1)
| Title |
|---|
| 彭泽琰等: "《航空燃气轮机原理》", 30 September 2000 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351925A (en) * | 2015-11-09 | 2016-02-24 | 上海华之邦科技股份有限公司 | Low-emission gas combustion furnace and combustion air preparation method thereof |
| CN106287706A (en) * | 2016-08-31 | 2017-01-04 | 林宇震 | Fuel gas mixing machine |
| CN108518677A (en) * | 2018-05-31 | 2018-09-11 | 西安西热锅炉环保工程有限公司 | A kind of low nitrogen burner |
| CN108518677B (en) * | 2018-05-31 | 2023-09-12 | 西安西热锅炉环保工程有限公司 | Low nitrogen gas combustor |
| CN112344330A (en) * | 2020-11-25 | 2021-02-09 | 江苏蓝创环保科技有限公司 | High-excess-air-coefficient low-nitrogen type integrated combustion device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102003710B (en) | Low emission high-power staged-combustion gas burner and gas collocation method thereof | |
| CN103267286B (en) | A kind of gas combustion apparatus of ultra-low NOx emission and gas collocation method | |
| CN201916905U (en) | Double-gas-mixing type gas oxygen-enrichment energy-saving combustor for ceramic kiln | |
| CN106482097B (en) | The partly-premixed low nitrogen burner of percussion flow | |
| CN102012025B (en) | Low-NOx combustor with internal reflux of flue gas and homogeneous combustion and gas configuration method thereof | |
| CN104566470B (en) | The head of combustion chamber structure of distributed flame | |
| CN107525095B (en) | A kind of axially staged can burner of gas turbine | |
| CN104456628A (en) | Layered part premixing low-pollution combustor of main combustion level lean oil premixing | |
| CN104896510B (en) | Flame holder and ground gas turbine combustion chamber with same | |
| CN105627304A (en) | Strong-swirling-flow fuel staging ultra-low-nitrogen gas burner | |
| CN104566471B (en) | A kind of nozzle and the gas turbine provided with the nozzle | |
| CN110186044A (en) | Air-gas partial premix combustor | |
| CN202494110U (en) | Gas spray-back type premixed low-NOx combustion device | |
| CN104566472B (en) | A kind of nozzle and gas turbine | |
| CN107575891A (en) | A kind of dual-fuel gas turbine low pollution combustor head construction | |
| CN104807044A (en) | Liquefied gas combustion chamber with outlet equipped with swirling vanes | |
| CN105465786A (en) | Low-NOx combustor suitable for various low-heat-value/low-pressure fuel gases | |
| CN104534515A (en) | Combustion chamber head structure of gas turbine | |
| CN102607025A (en) | Gas back-jetting pre-mixing low-NOx combustion apparatus and combustion method of combustion apparatus | |
| CN207599702U (en) | A kind of fuel strengthens classification ultra-low nitrogen volumetric combustion device | |
| CN105180213A (en) | Central region combustor with staged combustion function | |
| CN107559882B (en) | A kind of axially staged low pollution combustor | |
| CN109442398A (en) | A kind of multi-point direct spray is to cutting mixed radial spray low NO fastly | |
| CN102537959B (en) | Rotational flow and direct current combined gas burner | |
| CN201885229U (en) | Low-emission high-power sectionalized combustion gas burner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xiao Jiangdong Inventor before: Xiao Jiangdong Inventor before: Xu Zhibin |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: XIAO JIANGDONG XU ZHIBIN TO: XIAO JIANGDONG |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120725 |