CN103267286A - Fuel gas combustion device with ultra-low NOx emission amount and fuel gas distribution method - Google Patents
Fuel gas combustion device with ultra-low NOx emission amount and fuel gas distribution method Download PDFInfo
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- CN103267286A CN103267286A CN2013101837184A CN201310183718A CN103267286A CN 103267286 A CN103267286 A CN 103267286A CN 2013101837184 A CN2013101837184 A CN 2013101837184A CN 201310183718 A CN201310183718 A CN 201310183718A CN 103267286 A CN103267286 A CN 103267286A
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Abstract
The invention relates to a fuel gas combustion device with ultra-low NOx emission amount and a fuel gas distribution method, aims at enabling NOx emission amount to be smaller than 20ppm and meeting the low-emission requirement of a high-power combustor and belongs to the technical field of industrial boilers. The fuel gas combustion device with the ultra-low NOx emission amount is characterized in that a central barrel, a swirler, an inner throat and an outer throat are sequentially and coaxially arranged along the central axis of the combustion device outward, a first combustion air channel is arranged between the inner throat and the outer throat, a second combustion air channel is arranged between the inner side of the inner throat and the outer side of the central barrel, and a plurality of T-shaped fuel gas guns and a plurality of oblique-mouth fuel gas guns are arranged, staggered and evenly distributed in an equal-diameter mode. The fuel gas combustion device with the ultra-low NOx emission amount and the fuel gas distribution method have the advantages that fuel gas holes of the oblique-mouth fuel gas guns are outward, flame is formed in the first combustion air channel on the outer side of flame of the T-shaped fuel gas guns, accordingly a boiler furnace space is utilized to the most extent, the amount of produced NOx is little and is smaller than 20ppm, no CO is produced, and combustion is stable and reliable. The maximum power of one machine can reach to more than 70MW.
Description
Technical field
The present invention relates to a kind of gas combustion apparatus and combustion gas collocation method, relate in particular to a kind of NOx discharge capacity less than gas combustion apparatus and the combustion gas collocation method of the ultralow NOx discharging of 20ppm, belong to the Industrial Boiler Technology field.
Background technology
Along with going deep into of national energy-saving and emission-reduction policy, each big city is discharged NOx and has been not content with GB 100ppm, just required the NOx discharging less than 50ppm in cities such as Beijing as far back as 2008, Tianjin, Urumchi and some have all proposed the low emission requirement of high-power burner one after another with gas heating company subsequently, and the combustion gas of power plant starts require of boiler more and is emitted on below the 40ppm.But on the international market, for the advanced burner requirement of NOx discharging less than 50ppm, also the measure of many employing flue gas recirculation obtains so far, is about to send into burner and combustion gas mixing burning after boiler smoke extracts a part and fresh air mixes.Its mechanism mainly is to reduce airborne oxygen concentration, reduces the probability that airborne N is combined with oxygen.But this method certainly will need to increase blower power and power consumption, robs Peter to pay Paul just, and this method has also increased the unstability of burning simultaneously, causes easily and breathes heavily shake, has very big potential safety hazard.Shanghai Nuote Feibo Combustion Equipment Co., Ltd's name is called
"Backflow homogeneous combustion low-NOx combustor and combustion gas collocation method thereof in a kind of flue gas
"The patent No. is 201010582069.1 patent of invention, adopts the T type to return the partly-premixed combustion gas of spray gun and air, makes fuel gas buring even, the NOx discharging is less than 40ppm, but for powerful gas combustion apparatus, can reach lower discharge standard, be still waiting further research.
Summary of the invention
The objective of the invention is: gas combustion apparatus and the combustion gas collocation method of a kind of NOx discharge capacity less than the ultralow NOx discharging of 20ppm are provided, make that flame as far as possible effectively utilizes furnace cavity in the Industrial Boiler, reduce flame mean temperature and peak temperature, satisfied the instructions for use of ultralow NOx discharging.
For achieving the above object, the technical scheme of taking is: a kind of gas combustion apparatus of ultralow NOx discharging, comprise central tube, cyclone and aditus laryngis, it is characterized in that: described central tube, described cyclone, interior aditus laryngis and outer aditus laryngis are from the central axis outside coaxial setting successively of burner, end, described central tube upper end lateral surface is fixedlyed connected with the inner ring surface of described cyclone: described central tube is built-in with center combustion air passage, be equipped with the first combustion air passage between aditus laryngis and the outer aditus laryngis in described, the inboard and described central tube of described interior aditus laryngis is equipped with the second combustion air passage between the outside; In the described second combustion air passage, be equipped with a plurality of T type gas guns and a plurality of angle gas gun, and described a plurality of T type gas gun and the isometrical even distribution in the interlaced interval of a plurality of angle gas guns.
Described T type gas gun is equipped with a plurality of (6～16) fuel gas hole, spray orifice is returned in a section combustion gas outside being respectively, spray orifice, body of a gun fuel gas hole and end face fuel gas hole are returned in a lining section combustion gas: the combustion gas of described outer section is returned spray orifice and is placed section outside the body of a gun horizontal component, the section combustion gas is returned spray orifice and is placed section in the body of a gun horizontal component in described, described body of a gun fuel gas hole places body of a gun vertical component, and described end face fuel gas hole places entad end face of body of a gun horizontal component.
Described angle gas gun end face is towards from inside to outside, and is equipped with a plurality of angle fuel gas holes.
The combustion gas collocation method of the gas combustion apparatus of described ultralow NOx discharging is characterized in that:
(1) to outflow, described center combustion air accounts for 5～15% of total air to low speed center combustion air by described center combustion air channel axis, plays the effect of cooling root flame and reduction flame of centre temperature;
(2) combustion gas that angle gas gun end face angle fuel gas hole ejects in the described first combustion air passage with the combustion air mixed combustion of the first combustion air channel axis to outflow of flowing through, can burn combustion gas in the big as far as possible space of whole burner hearth;
(3) in the described second combustion air passage, combustion air is divided into two large divisions's axial flow, and the part swirler blades of flowing through becomes eddy flow wind, and eddy flow wind combustion air accounts for 30%～45% of total air; Another part combustion air becomes axial flow wind then from axial flow between cyclone outer shroud and the interior aditus laryngis; T type gas gun is equipped with described in the section combustion gas combustion gas of returning the spray orifice ejection liquidate with the eddy flow wind that flows out through cyclone; Combustion gas and axial flow wind that the spray orifice ejection is returned in the combustion gas of outer section liquidate; Combustion gas and vertical the liquidating of described axial combustion air that described body of a gun fuel gas hole and described end face fuel gas hole radially spray.
The invention has the beneficial effects as follows: because the rifle combustion gas of T type and air pre-mixing reasonably make combustion gas and combustion air in the even mixed combustion of furnace cavity, avoided the generation of localized hyperthermia; And the fuel gas hole of angle gas gun outwardly, the outside at T type rifle flame forms flame, thereby utilized the boiler furnace space to greatest extent, make that the thermic load of the interior various piece of burner hearth is even, flame mean temperature and peak temperature have been reduced, thereby make that the NOx amount that produces is few, less than 20ppm, and do not have the CO generation.Flameholding is reliable.The single-machine capacity maximum can reach more than the 70MW.
Description of drawings
Below with reference to the accompanying drawings the explanation and the specific embodiment the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to structural representation;
Fig. 3 is hydrocyclone structure schematic diagram among Fig. 1;
Fig. 4 is T type gas gun header structure schematic diagram;
Fig. 5 is that the B of Fig. 4 is to structural representation;
Fig. 6 is that the C of Fig. 4 is to structural representation;
Fig. 7 angle gas gun schematic diagram;
Fig. 8 is that the D of Fig. 7 is to structural representation;
Fig. 9 arranges schematic diagram for furnace flame.
Among the figure, 1. in aditus laryngis; 2.T type gas gun; 3. cyclone; 4. central tube; 5. angle gas gun; 6. outer aditus laryngis; 7. furnace wall; 8. spray orifice is returned in the combustion gas of outer section; 9. spray orifice is returned in the section combustion gas in; 10. swirler blades; 11. cyclone outer shroud; 12. ring in the cyclone; 13. combustion chamber; 14. angle rifle fuel gas hole; 15. angle gas gun end face; 16. body of a gun fuel gas hole; 17 end face fuel gas holes; 18. center combustion air passage; 19. the second combustion air passage; 20. the first combustion air passage; 21. angle rifle flame zone; 22.T type rifle flame zone.
The specific embodiment
Fig. 1 and Fig. 2 are the gas combustion apparatus structural representation of a kind of ultralow NOx discharging of the present invention.Furnace flame was arranged schematic diagram when Fig. 9 used for the present invention.
As shown in Figure 1, 2 as seen, described gas combustion apparatus structure comprises central tube 4, cyclone 3 and aditus laryngis, it is characterized in that: from the central axis of burner outwards successively coaxial arrange described central tube 4, described cyclone 3, interior aditus laryngis 1 and outside aditus laryngis 6; Fixedly connected with ring 12 in the described cyclone in the outside, end, described central tube 4 upper end; Be equipped with a plurality of T type gas guns 2 and a plurality of angle gas gun 5 between described cyclone outer shroud 11 and the described interior aditus laryngis 1, and described a plurality of T type gas gun 2 and the isometrical even distribution in a plurality of angle gas gun 5 interlaced intervals.
Fig. 3 is the hydrocyclone structure schematic diagram, and as seen by shown in Figure 3, cyclone 3 is by ring 12 in cyclone outer shroud 11, the cyclone and place some swirler blades 10 therebetween to form, and it is streamlined that described swirler blades 10 is the curved shape of plunderring, and evenly is periphery.Made by exotic material, make that crushing was little when air passed through, flow pattern good, be easy to evenly mix with combustion gas.
The structural representation of T type gas gun is illustrated in Fig. 4～Fig. 6.Illustrate described T type gas gun 2 and be equipped with a plurality of (6～16) fuel gas hole, spray orifice 8 is returned in a section combustion gas outside being respectively, spray orifice 9, body of a gun fuel gas hole 16 and end face fuel gas hole 17 are returned in a lining section combustion gas, and combustion gas is flowed out from these little fuel gas holes, becomes the thin gas-flow of multiply.Spray orifice 8(quantity is returned in the combustion gas of described outer section 0～6) place the outer section of body of a gun horizontal component, spray orifice 9(2～10 are gone back in a section combustion gas in described) place section in the body of a gun horizontal component, described body of a gun fuel gas hole 16(1～4) place body of a gun vertical component, described end face fuel gas hole 17(1～3) place entad end face of body of a gun horizontal component.Radially combustion gas and the described axial combustion air of ejection liquidate from outside to inside for described body of a gun fuel gas hole 16 and described end face fuel gas hole 17.
From Fig. 7,8 angle gas gun schematic diagrames as seen: described angle gas gun end face 15 is equipped with 1～3 group of fuel gas hole 14(14-a, 14-b, 14-c), and described angle gas gun end face 15 is towards from inside to outside.
Be the second combustion air passage 19 between aditus laryngis 1 inboard and described central tube 4 lateral surfaces in described, in the described second combustion air passage 19, the combustion air axial flow is divided into the two large divisions, a part 10 one-tenth eddy flow wind of swirler blades of flowing through, and this part wind accounts for 30%～45% of total blast volume; Another part air becomes axial flow wind then from axial flow between cyclone outer shroud 11 and the interior aditus laryngis 1; Return the combustion gas of spray orifice 9 ejections through 2 li section combustion gas of T type gas gun, the eddy flow wind that comes out with the cyclone of flowing through sprays refunds, returning combustion gas and the axial flow wind that spray orifice 8 returns spray vertically through the combustion gas of outer section liquidates, through T type rifle 2 described body of a gun fuel gas holes 16 and the radially combustion gas of ejection from outside to inside of described end face fuel gas hole 17, with vertical the liquidating of axial combustion air by the described second combustion air passage 19.
Be that as seen furnace flame is arranged shown in the schematic diagram by Fig. 9, because the fuel gas hole of T type gas gun 2 is back spray or spray from outside to inside basically, therefore combustion gas can not spray burner throat, more mix equably with the combustion air that axially flows out from the second combustion air passage 19 before the unburned to the full extent, at the inboard T type rifle flame zone 22 formation back taper flames of furnace flame; Be the first combustion air passage 20 between aditus laryngis 1 and the outer aditus laryngis 6 in described, combustion air is axially flowed out by the first combustion air passage 20 between interior aditus laryngis 1 and the outer aditus laryngis 6.And angle gas gun end face 15 from inside to outside, the combustion air mixed combustion that the combustion gas of ejecting and the first combustion air passage 20 axially flow out, produce flame at the outside of furnace flame angle rifle flame zone 21, combustion gas can be burnt in the big as far as possible space of whole burner hearth.
Make the evenly mixed combustion in furnace cavity of combustion gas and combustion air, avoided the generation of localized hyperthermia; The angle rifle then forms flame in the outside of T type rifle flame, has effectively utilized furnace cavity, has reduced flame mean temperature and peak temperature, thereby makes the NOx that produces minute quantity, less than 20ppm, and does not have the CO generation.Flameholding is reliable.The single-machine capacity maximum can reach more than the 70MW.
Claims (4)
1. the gas combustion apparatus of a ultralow NOx discharging, comprise central tube, cyclone and aditus laryngis, it is characterized in that: described central tube, described cyclone, interior aditus laryngis and outer aditus laryngis are from the central axis outside coaxial setting successively of burner, end, described central tube upper end lateral surface is fixedlyed connected with the inner ring surface of described cyclone: described central tube is built-in with center combustion air passage, be equipped with the first combustion air passage between aditus laryngis and the outer aditus laryngis in described, the inboard and described central tube of described interior aditus laryngis is equipped with the second combustion air passage between the outside; In the described second combustion air passage, be equipped with a plurality of T type gas guns and a plurality of angle gas gun, and described a plurality of T type gas gun and the isometrical even distribution in the interlaced interval of a plurality of angle gas guns.
2. according to the gas combustion apparatus of the described a kind of ultralow NOx discharging of claim 1, it is characterized in that: described T type gas gun is equipped with a plurality of fuel gas holes, spray orifice is returned in a section combustion gas outside being respectively, spray orifice, body of a gun fuel gas hole and end face fuel gas hole are returned in a lining section combustion gas: the combustion gas of described outer section is returned spray orifice and is placed section outside the body of a gun horizontal component, the section combustion gas is returned spray orifice and is placed section in the body of a gun horizontal component in described, described body of a gun fuel gas hole places body of a gun vertical component, and described end face fuel gas hole places entad end face of body of a gun horizontal component.
3. according to the gas combustion apparatus of the described a kind of ultralow NOx discharging of claim 1, it is characterized in that: described angle gas gun end face is towards from inside to outside, and is equipped with a plurality of angle fuel gas holes.
4. the combustion gas collocation method of the gas combustion apparatus of the described a kind of ultralow NOx discharging of claim 1 is characterized in that:
(1) to outflow, described center combustion air accounts for 5～15% of total air to low speed center combustion air by described center combustion air channel axis, plays the effect of cooling root flame and reduction flame of centre temperature;
(2) combustion gas that angle gas gun end face angle fuel gas hole ejects in the described first combustion air passage with the combustion air mixed combustion of the first combustion air channel axis to outflow of flowing through, can burn combustion gas in the big as far as possible space of whole burner hearth;
(3) in the described second combustion air passage, combustion air is divided into two large divisions's axial flow, and the part swirler blades of flowing through becomes eddy flow wind, and eddy flow wind combustion air accounts for 30%～45% of total air; Another part combustion air becomes axial flow wind then from axial flow between cyclone outer shroud and the interior aditus laryngis; T type gas gun is equipped with described in the section combustion gas combustion gas of returning the spray orifice ejection liquidate with the eddy flow wind that flows out through cyclone; Combustion gas and described axial combustion air that the spray orifice ejection is returned in the combustion gas of outer section liquidate; Combustion gas and vertical the liquidating of described axial combustion air that described body of a gun fuel gas hole and described end face fuel gas hole radially spray.
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| CN201310183718.4A CN103267286B (en) | 2013-05-17 | 2013-05-17 | A kind of gas combustion apparatus of ultra-low NOx emission and gas collocation method |
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Cited By (10)
| 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 |
| CN105465786A (en) * | 2015-12-08 | 2016-04-06 | 上海华之邦科技股份有限公司 | Low-NOx combustor suitable for various low-heat-value/low-pressure fuel gases |
| CN108826289A (en) * | 2018-08-29 | 2018-11-16 | 上海诺特飞博燃烧设备有限公司 | Gas gun device and its burner and boiler |
| CN108895449A (en) * | 2018-08-29 | 2018-11-27 | 上海诺特飞博燃烧设备有限公司 | Burn air gun device and burner and boiler |
| CN109073225A (en) * | 2016-04-07 | 2018-12-21 | 韩国生产技术研究院 | Minimum discharge burner |
| CN109297018A (en) * | 2017-07-24 | 2019-02-01 | 福州华夏蓝天信息科技有限公司 | A kind of low nitrogen burner |
| CN109668149A (en) * | 2019-01-09 | 2019-04-23 | 上海迎韦热能设备有限公司 | Burner and central flame flame boiler containing it |
| CN112797406A (en) * | 2021-02-25 | 2021-05-14 | 佛山市金之鑫环保科技有限公司 | High-speed energy-saving environment-friendly gas burner and combustion method |
| CN113757665A (en) * | 2021-09-23 | 2021-12-07 | 深圳市佳运通电子有限公司 | Gas burner system and working method thereof |
| CN115346430A (en) * | 2022-08-01 | 2022-11-15 | 东越厨电(苏州)股份有限公司 | Gas experiment configurator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN109668149B (en) * | 2019-01-09 | 2024-02-23 | 上海迎韦热能设备有限公司 | Combustor and central backfire boiler comprising same |
| CN112797406A (en) * | 2021-02-25 | 2021-05-14 | 佛山市金之鑫环保科技有限公司 | High-speed energy-saving environment-friendly gas burner and combustion method |
| CN113757665A (en) * | 2021-09-23 | 2021-12-07 | 深圳市佳运通电子有限公司 | Gas burner system and working method thereof |
| CN115346430A (en) * | 2022-08-01 | 2022-11-15 | 东越厨电(苏州)股份有限公司 | Gas experiment configurator |
| CN115346430B (en) * | 2022-08-01 | 2023-09-26 | 东越厨电(苏州)股份有限公司 | Gas experiment configurator |
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