CN202494110U - Gas spray-back type premixed low-NOx combustion device - Google Patents
Gas spray-back type premixed low-NOx combustion device Download PDFInfo
- Publication number
- CN202494110U CN202494110U CN2012201072395U CN201220107239U CN202494110U CN 202494110 U CN202494110 U CN 202494110U CN 2012201072395 U CN2012201072395 U CN 2012201072395U CN 201220107239 U CN201220107239 U CN 201220107239U CN 202494110 U CN202494110 U CN 202494110U
- Authority
- CN
- China
- Prior art keywords
- spray
- gas
- cyclone
- combustion gas
- combustion
- 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 - Lifetime
Links
Images
Abstract
The utility model discloses a gas spray-back type premixed low-NOx combustion device, which belongs to the technical field of high-power industrial combustors. The gas spray-back type premixed low-NOx combustion device is characterized in that a central cylinder is axially arranged in the center of a throat, wherein the end part of the central cylinder is connected with a cyclone which is coaxially arranged; the internal diameter and the external diameter of the central cylinder are matched with those of an inner ring of the cycle; a peripheral axial flow air passage is formed between the periphery of the outer ring of the cyclone and the inner wall of the throat; and spray-back hammer type gas guns are uniformly arranged in the radial direction of the throat. After gas enters from the spray-back hammer type gas guns, the gas is divided into two parts, i.e., gas sprayed out from straight spray-back holes and gas sprayed out from oblique spray-back holes, wherein the gas sprayed out from the straight spray-back holes is sprayed back in the axial direction and is subjected to counter-flow with peripheral axial flow air; and the gas sprayed out from the oblique spray-back holes is subjected to counter-flow with cyclone air in the tangential direction. The gas spray-back type premixed low-NOx combustion device has the positive effects that the gas and the air are sprayed back, subjected to counter-flow, and are fully and uniformly mixed to produce an extremely small amount of NOx of less than 29 ppm without CO. The combustion is stable and reliable, and the single-machine capacity can reach over 70 MW at the maximum.
Description
Technical field
The utility model relates to high-power industrial burner with the gas burner technology, relates in particular to a kind of combustion gas and returns spray, and 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 purpose of the utility model is: overcome defectives such as NOx discharge capacity height that diffusion type (non-premix) combustion technology gas burner in the past runs into, excess air coefficient optimization; Provide a kind of combustion gas to return spray formula premix low NOx combustion apparatus, on high-power burner, use the premixed combustion technology safely and reliably.
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 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 radially the inboard is 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 gas of combustion gas straight gyrus spray orifice ejection is returned spray vertically and is liquidated with peripheral axial flow wind; 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.
The good effect of the utility model 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 utility model is described further.
Fig. 1. be the utility model structural representation (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 the utility model structural representation, 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 head 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 time spray orifice, 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 (3)
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 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201072395U CN202494110U (en) | 2011-12-06 | 2012-03-21 | Gas spray-back type premixed low-NOx combustion device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120502173 | 2011-12-06 | ||
| CN201120502173.5 | 2011-12-06 | ||
| CN2012201072395U CN202494110U (en) | 2011-12-06 | 2012-03-21 | Gas spray-back type premixed low-NOx combustion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202494110U true CN202494110U (en) | 2012-10-17 |
Family
ID=47000335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201072395U Expired - Lifetime CN202494110U (en) | 2011-12-06 | 2012-03-21 | Gas spray-back type premixed low-NOx combustion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202494110U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607025A (en) * | 2011-12-06 | 2012-07-25 | 上海诺特飞博燃烧设备有限公司 | Gas back-jetting pre-mixing low-NOx combustion apparatus and combustion method of combustion apparatus |
| CN103267286A (en) * | 2013-05-17 | 2013-08-28 | 上海诺特飞博燃烧设备有限公司 | Fuel gas combustion device with ultra-low NOx emission amount and fuel gas distribution method |
| CN105698172A (en) * | 2016-04-11 | 2016-06-22 | 徐州科融环境资源股份有限公司 | Petal-shaped staged combustion gas low-nitrogen combustor |
| CN108518680A (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 based on Z-type Fuel lance |
-
2012
- 2012-03-21 CN CN2012201072395U patent/CN202494110U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607025A (en) * | 2011-12-06 | 2012-07-25 | 上海诺特飞博燃烧设备有限公司 | Gas back-jetting pre-mixing low-NOx combustion apparatus and combustion method of combustion apparatus |
| CN103267286A (en) * | 2013-05-17 | 2013-08-28 | 上海诺特飞博燃烧设备有限公司 | Fuel gas combustion device with ultra-low NOx emission amount and fuel gas distribution method |
| CN103267286B (en) * | 2013-05-17 | 2015-09-09 | 上海诺特飞博燃烧设备有限公司 | A kind of gas combustion apparatus of ultra-low NOx emission and gas collocation method |
| CN105698172A (en) * | 2016-04-11 | 2016-06-22 | 徐州科融环境资源股份有限公司 | Petal-shaped staged combustion gas low-nitrogen combustor |
| CN105698172B (en) * | 2016-04-11 | 2017-11-28 | 徐州科融环境资源股份有限公司 | A kind of petal fractional combustion combustion gas low NO |
| CN108518680A (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 based on Z-type Fuel lance |
| CN108518680B (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 based on Z-type fuel spray gun |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103267286B (en) | A kind of gas combustion apparatus of ultra-low NOx emission and gas collocation method | |
| CN102003710B (en) | Low emission high-power staged-combustion gas burner and gas collocation method thereof | |
| 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 | |
| CN106482097B (en) | The partly-premixed low nitrogen burner of percussion flow | |
| CN104896510B (en) | Flame holder and ground gas turbine combustion chamber with same | |
| 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 | |
| CN105627304A (en) | Strong-swirling-flow fuel staging ultra-low-nitrogen gas burner | |
| CN202494110U (en) | Gas spray-back type premixed low-NOx combustion device | |
| CN109695877A (en) | A kind of two-stage combustion formula fire row combustor | |
| CN104566472B (en) | A kind of nozzle and gas turbine | |
| CN105465786A (en) | Low-NOx combustor suitable for various low-heat-value/low-pressure fuel gases | |
| CN104534515A (en) | Combustion chamber head structure of gas turbine | |
| CN105180213A (en) | Central region combustor with staged combustion function | |
| CN104807044A (en) | Liquefied gas combustion chamber with outlet equipped with swirling vanes | |
| CN207648852U (en) | A kind of combustion chamber and gas turbine | |
| 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 | |
| CN102607025A (en) | Gas back-jetting pre-mixing low-NOx combustion apparatus and combustion method of combustion apparatus | |
| CN102537959B (en) | Rotational flow and direct current combined gas burner | |
| CN201885229U (en) | Low-emission high-power sectionalized combustion gas burner | |
| CN110145737A (en) | A kind of rotational-flow stable-flame radial spray low NO | |
| CN109340823A (en) | A kind of head of combustion chamber oil gas mixing machine | |
| CN205480976U (en) | Hierarchical ultralow nitrogen gas burner of strong whirl fuel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121017 |