CN101324334A - Low NOx liquid state slag-off double-eddy flow coal-powder combustor - Google Patents
Low NOx liquid state slag-off double-eddy flow coal-powder combustor Download PDFInfo
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- CN101324334A CN101324334A CNA2008100410710A CN200810041071A CN101324334A CN 101324334 A CN101324334 A CN 101324334A CN A2008100410710 A CNA2008100410710 A CN A2008100410710A CN 200810041071 A CN200810041071 A CN 200810041071A CN 101324334 A CN101324334 A CN 101324334A
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- wind
- rear end
- coal
- end cap
- injection pipe
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Abstract
The invention relates to a low-NOx slag tapping double-swirl pulverized coal burner, which is suitable for 2-35 ton steam and hot water boiler and burning devices desired for heat energy for various kinds of industrial productions such as furnace, forging, steel making, road and bridge mixing station, and cold aggregate heating. The low-NOx slag tapping double-swirl pulverized coal burner comprises an adjustable burning device and a cylindrical burning chamber and is characterized in that the housing of the burning chamber is a heat insulating layer; a cooling water channel or a secondary air heat exchange fin is arranged between the housing the burning chamber and a secondary air chamber; a cooling water outlet pipe and a cooling water inlet pipe are respectively arranged on the upper and the lower ends of the cooling water channel; and a primary gas axial flow generator is arranged on the top of the jacket of an adjusting screw. The low-NOx slag tapping double-swirl pulverized coal burner has the advantages of sufficient burning and improved service life.
Description
Technical field
The present invention relates to a kind of low NOx liquid state slag-off double-eddy flow coal-powder combustor, be applicable to 2-35 ton steam, hot-water boiler, stove, forging, steel-making, road and bridge blending station and various industrial production such as cold aggregate heating to the burner of heat energy demand, belong to the coal burner technical field.
Background technology
Grate firing boiler is the type of furnace of present Industrial Boiler extensive use, is made up of critical pieces such as pressure-containing parts, traveling-grate stokers, and bunker coal is layer combustion on fire grate, during burning and Air mixing insufficient, cause burning not thoroughly, low, the q of burnout rate
4Loss is big, and smoke evacuation contains NOx, SO
2, the dust concentration height, contaminated environment.For addressing these problems, the applicant once was called " low NOx axial eddy pulverized-coal burner " utility model patent in the name of application on 02 12nd, 2007, publication number is CN201014436, the name of application on June 11st, 2007 is called the patent of invention of " low NOx multi-tube axial eddy pulverized-coal burner ", application number is 200710110815.5, and the shortcoming of these two kinds of burners is:
1, owing to be the combustion system of a wind, coal dust firing is abundant not enough;
2, because the ignition temperature of burner is very high, thereby influence the service life of burner.
Summary of the invention
The purpose of this invention is to provide a kind of sufficient combustion, improve the low NOx liquid state slag-off double-eddy flow coal-powder combustor in service life.
For realizing above purpose, technical scheme of the present invention provides a kind of low NOx liquid state slag-off double-eddy flow coal-powder combustor, is made up of adjustable air-cone and tubular combustion chamber:
Described adjustable air-cone comprises rear end cap, rear end cap is articulated in rear end, tubular combustion chamber by the rear end cap hinge, rear end cap one side is provided with rear end cap locking control handwheel, the rear end cap center is provided with an a wind/coal dust injection pipe, cone is adjusted control handwheel and is located at coal dust injection pipe end, one time wind/coal dust injection pipe upper end is provided with a cartridge, one time wind/coal dust injection pipe front end is connected with the tubular combustion chamber, in the wind/coal dust injection pipe cut-out governing screw rod is set, nozzle is adjusted screw rod and is provided with the adjusting screw(rod) overcoat outward, the cut-out governing screw front end is fixed a cone, one time wind/coal dust injection pipe front end is connected with diffuser, cone and diffuser constitute one can debug nozzle, rear end cap is provided with a sparking gear and fuel oil or gas igniter, see vent and be located on the rear end cap with sight vent locking control handwheel, flame detection sensor is fixed on the middle part of seeing vent.
Described tubular combustion chamber comprises burning chamber shell, burning chamber shell is provided with the secondary air chamber of being made up of the secondary air chamber shell outward, and hanger, radially be provided with at least 4 row rectangular ring air channels at secondary air chamber, be provided with radially mozzle of at least 5 secondary wind in each row rectangular ring air channel, be provided with each section door regulating plate and air door operating mechanism at secondary air chamber shell inlet tube, secondary air mouth end is provided with secondary wind general import flange, it is characterized in that described burning chamber shell is a heat insulation layer; Between burning chamber shell and secondary air chamber, be provided with cooling water channel or secondary wind heat exchange fin, be respectively equipped with cooling outlet pipe and cooling water inlet pipe at the upper and lower side of cooling water channel; Be provided with a wind axis to rotational flow generator on adjusting screw(rod) overcoat top.
The difference of the present invention and existing burner is:
1. the present invention makes the coal powder/air mist divide section, combustion with meagre oxygen in burner, thereby produces reduction reaction, makes the nitrogen oxide reduction:
CO+NO→CO
2+N
2
H
2+NO→N
2+H
2O
CH
i+NO→HCN+O
HCN+NO → N
2+ ... (excess air coefficient α＜1)
NO+C→N
2+CO
From the product of above-mentioned reaction equation as can be seen, the generation of NOx is suppressed, and reaches clean combustion, obtains the effect that NOx reduces discharging;
2. the present invention increases a wind axis to rotational flow generator, adopt the diameter of axle to part section control burning of bispin stream, realize primary wind and powder coal mixtures and secondary wind fine coal mixed proportion adjusting burning, make that 150～300 purpose granule coal dusts can mix with hot-air fully, burning velocity is fast, burnout rate is up to 99.5%; Liquid retention efficiency is higher than more than 85%, and (its liquid lime-ash contains SiO to the dust concentration in the reduction smoke evacuation
260%, contains Al
2O
325% all is raw materials for production of potassium base sodium metasilicate and alumina silicate, silica gel product), reduce smoke discharge amount;
3. the present invention is provided with cooling water channel or secondary wind heat exchange fin between burning chamber shell and secondary air chamber, and with burning chamber shell as heat insulation layer, make the external secondary air chamber of combustion chamber shell not be subjected to the influence of combustion chamber high temperature like this, improve service life of the present invention.
4. present, 2-35 ton steam, the hot-water boiler that use in the whole nation are thousands of, transform these boilers according to technical scheme of the present invention, will produce huge reduction of discharging social benefit, can obtain surprising energy saving economy achievement again.
Advantage of the present invention is a sufficient combustion, and effects of energy saving and emission reduction is remarkable, and prolong service life.
Description of drawings
Fig. 1 is 1 one kinds of water-cooled low NOx liquid state slag-off double-eddy flow coal-powder combustors of embodiment structural representation;
Fig. 2 is a kind of water-cooled low NOx liquid state slag-off double-eddy flow coal-powder combustor A-A schematic diagram;
Fig. 3 is a kind of water-cooled low NOx liquid state slag-off double-eddy flow coal-powder combustor B-B schematic diagram;
Fig. 4 is a wind axis flow-generator structural representation;
Fig. 5 is 2 one kinds of air-cooled low NOx liquid state slag-off double-eddy flow coal-powder combustor structural representations of embodiment;
Fig. 6 is a kind of air-cooled low NOx liquid state slag-off double-eddy flow coal-powder combustor A-A schematic diagram.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment 1
With 10 tons of traveling-grate stoker steam boiler burners is example, as shown in Figure 1, 2, 3, be a kind of water-cooled low NOx liquid state slag-off double-eddy flow coal-powder combustor structural representation, described a kind of water-cooled low NOx liquid state slag-off double-eddy flow coal-powder combustor, form by adjustable air-cone 5 and combustion chamber 30:
Described adjustable air-cone 5 by rear end cap 2, cone 6, adjusting screw(rod) overcoat 7, cut-out governing screw rod 8, diffuser 9, wind axis flow-generator 10, a cone adjust control handwheel 11, cartridge 12, sparking gear 13, igniter 14, see vent 15, see vent locking control handwheel 16, rear end cap hinge 23 and rear end cap locking control handwheel 24, wind/coal dust injection pipe 25 and flame detection sensor 28 constitute.
Described combustion chamber 30 is the tubular combustion chamber, by cooling water channel 1, secondary air chamber shell 3, hanger 4, rectangular ring air channel 17, air door operating mechanism 18, secondary air chamber 19, burning chamber shell 20, support 21, base 22, cooling outlet pipe 26, secondary wind inlet flange 27, cooling water inlet pipe 29, door regulating plate 31 and secondary wind radially mozzle 32 form.
1400 millimeters of tubular combustion chamber 30 internal diameters, long 2000 millimeters, inner core is that thick 8 millimeters steel plate rolls welding, burning chamber shell 20 heat insulation layers water material feeding by unshape refractory or unsetting high temperature and make, between burning chamber shell 20 and secondary air chamber 19, be provided with cooling water channel 1, annular cooling water road 1 urceolus is rolled by thick 8 millimeters steel plate, be welded with grasp on the inner bag of cooling water channel 1, burning chamber shell 20 heat insulation layers are cast on the inner bag, be connected with burning chamber shell 20 assembly weldings, annular cooling water road 1 is wide 100 millimeters, the upper and lower side of cooling water channel 1 is respectively equipped with cooling outlet pipe 26 and cooling water inlet pipe 29, secondary air chamber 19 usefulness 4 row rectangular ring air channels 17 roll secondary air chamber shell 3 by thick 4 millimeters steel plate, be connected with the coaxial arrangement assembly welding of cooling water channel 1 urceolus, the air channel of secondary air chamber 19 is wide 150 millimeters, establish 5 radially secondary wind mozzles 32 radially in every row rectangular ring air channel 17, secondary wind radially mozzle 32 radially is 12 degree, with tangentially be 56 degree angles in the tube and arrange, the secondary wind radially diameter of mozzle 32 is 63 millimeters, 20 secondary wind in the annular cover radially mozzle 32 make tangential perforation the in rectangle endless belt and the cylindrical shell, secondary wind radially mozzle 32 tangentially runs through cooling water channel 1 and burning chamber shell 20 heat insulation layer assembly weldings to cooling water channel 1 urceolus, the coaxial Combination Welding of rectangular ring air channel end opening ∩ shape of adjustable secondary air chamber 19 is to cooling water channel 1 urceolus surface, and makes secondary wind pass cooling water channel 1 and burning chamber shell 20 heat insulation layers tangentially enter combustion chamber 30 inner chambers.Be provided with each section door regulating plate 31 and air door operating mechanism 18 at secondary air chamber shell 3 inlet tubes, can realize the control of branch section, secondary air mouth end is provided with secondary wind general import flange 27, cartridge 12 and a wind/coal dust injection pipe 25 are axial 38 degree welded corner joints, one time wind/coal dust injection pipe 25 ports of export are provided with wind axis flow-generator 10 one time, as shown in Figure 4, it is a wind axis flow-generator structural representation, one time wind axis is made up of 3 spoilers 35 to rotational flow generator 10, cut-out governing screw rod 8 coaxial core are located in the adjusting screw(rod) overcoat 7 and are located at wind/coal dust injection pipe 25 shell centers one time, coaxial with a wind/coal dust injection pipe 25,3 spoilers 35 evenly are located between adjusting screw(rod) overcoat 7 and wind/coal dust injection pipe 25 shell.
Adjustable air-cone 5 and combustion chamber 30 respectively are the independent structures body, both connect into an integral body by dismountable hinges, in such integral body, finish the conveying of coal dust fuel and with Air mixing, catch fire, the reduction of overheavy firing, NOx, burn, liquid slagging, low NOx drainage all processes, clean high-temperature flue gas is delivered to boiler furnace and is absorbed and used.
One of example of the present invention: boiler is transformed, low NOx liquid state slag-off double-eddy flow coal-powder combustor is installed, transform the SZL10-1.25-AII chain grate boiler that boiler is produced for the boiler factory, Nantong, the boiler use that puts into operation of dispatching from the factory in 05 year, the boiler test thermal efficiency 70.2%, coal-fired burnout rate 76%, NOx discharge 900mg/m
3, SO
2Discharging 1200mg/m
3, Lin Geman＞1 grade, per hour use 1.8 tons in mark coal, reaching applying working condition from a stove needed more than 2 hours, about 830 ℃ of fire box temperatures, and discharge with black smoke.Per hour use mark coal 850～1100kg after the transformation, reach applying working condition from a stove and need about 35 minutes, fire box temperature reaches 860 ℃～960 ℃, has only the white flue gas of moisture vapor to discharge, and coal saving rate is 35%, burnout rate is more than 99%, the thermal efficiency 91%, NOx discharge 29mg/m
3, SO
2Discharging 224mg/m
3, 0.5 grade of Lin Geman.
With 10 tons of traveling-grate stoker steam boiler burners is example, shown in Fig. 5,6, be a kind of air-cooled low NOx liquid state slag-off double-eddy flow coal-powder combustor structural representation, described a kind of air-cooled low NOx liquid state slag-off double-eddy flow coal-powder combustor, be made up of with combustion chamber 30 adjustable air-cone 5: adjustable air-cone 5 is identical with embodiment 1, unique difference of combustion chamber 30 is to be provided with secondary wind heat exchange fin 33 between burning chamber shell 20 and secondary air chamber 19, and other parts are all identical with embodiment 1.
Two of example of the present invention: boiler is transformed, air-cooled low NOx liquid state slag-off double-eddy flow coal-powder combustor is installed, transform the SZL10-1.25-AII chain grate boiler that boiler is produced for the boiler factory, Nantong, the boiler use that puts into operation of dispatching from the factory in 05 year, the boiler test thermal efficiency 70.2%, coal-fired burnout rate 76%, NOx discharge 900mg/m
3, SO
2Discharging 1200mg/m
3, Lin Geman＞1 grade, per hour use 1.8 tons in mark coal, reaching applying working condition from a stove needed more than 2 hours, about 830 ℃ of fire box temperatures, and discharge with black smoke.Per hour use mark coal 850～1100kg after the transformation, reach applying working condition from a stove and need about 35 minutes, fire box temperature reaches 860 ℃～960 ℃, has only the white flue gas of moisture vapor to discharge, and coal saving rate is 35%, burnout rate is more than 99%, the thermal efficiency 91%, NOx discharge 29mg/m
3, SO
2Discharging 224mg/m
3, 0.5 grade of Lin Geman.
Claims (3)
1. low NOx liquid state slag-off double-eddy flow coal-powder combustor, form by adjustable air-cone (5) and combustion chamber (30):
Described adjustable air-cone (5) comprises rear end cap (2), rear end cap (2) is articulated in rear end, tubular combustion chamber (30) by rear end cap hinge (23), rear end cap (2) one sides are provided with rear end cap locking control handwheel (24), rear end cap (2) center is provided with a wind/coal dust injection pipe (25), cone is adjusted control handwheel (11) and is located at wind/coal dust injection pipe (25) end one time, one time wind/coal dust injection pipe (25) upper end is provided with a cartridge (12), one time wind/coal dust injection pipe (25) front end is connected with the tubular combustion chamber, in the wind/coal dust injection pipe (25) a cut-out governing screw rod (8) is set, nozzle is adjusted the outer adjusting screw(rod) overcoat (7) that is provided with of screw rod (8), cut-out governing screw rod (8) front end is fixed a cone (6), one time wind/coal dust injection pipe (25) front end is connected with diffuser (9), cone (6) constitutes one with diffuser (9) can debug nozzle, rear end cap (2) is provided with a sparking gear (13) and fuel oil or gas igniter (14), sight vent (15) and sight vent locking control handwheel (16) are located on the rear end cap (2), and flame detection sensor (28) is fixed on the middle part of seeing vent (15);
Described combustion chamber (30) comprises burning chamber shell (20), outer secondary air chamber (19) and the hanger of forming by secondary air chamber shell (3) (4) that be provided with of burning chamber shell (20), radially be provided with at least 4 row rectangular ring air channels (17) at secondary air chamber (19), in each row rectangular ring air channel (17), be provided with radially mozzle (32) of at least 5 secondary wind, be provided with each section door regulating plate (31) and air door operating mechanism (18) at secondary air chamber shell (3) inlet tube, secondary air mouth end is provided with secondary wind general import flange (27), it is characterized in that described burning chamber shell (20) is a heat insulation layer; Between burning chamber shell (20) and secondary air chamber (19), be provided with cooling water channel (1) or secondary wind heat exchange fin (33), be respectively equipped with cooling outlet pipe (26) and cool off water inlet pipe (29) at the upper and lower side of cooling water channel (1); Be provided with a wind axis to rotational flow generator (10) on adjusting screw(rod) overcoat (7) top.
2. a kind of low NOx liquid state slag-off double-eddy flow coal-powder combustor according to claim 1, it is characterized in that, a described wind axis is made up of at least 3 spoilers (35) to rotational flow generator (10), and at least 3 spoilers (35) evenly are located between adjusting screw(rod) overcoat (7) and wind/coal dust injection pipe (25) shell.
3. a kind of low NOx liquid state slag-off double-eddy flow coal-powder combustor according to claim 1 is characterized in that, the material of described burning chamber shell (20) heat insulation layer is that unshape refractory or unsetting high temperature water material feeding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100410710A CN101324334B (en) | 2008-07-28 | 2008-07-28 | Low NOx liquid state slag-off double-eddy flow coal-powder combustor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100410710A CN101324334B (en) | 2008-07-28 | 2008-07-28 | Low NOx liquid state slag-off double-eddy flow coal-powder combustor |
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|---|---|
| CN101324334A true CN101324334A (en) | 2008-12-17 |
| CN101324334B CN101324334B (en) | 2011-03-23 |
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| CN103015358A (en) * | 2011-09-23 | 2013-04-03 | 金朝晖 | Combustion gas generator used for removing ice and snow and corresponding ice and snow removing equipment |
| CN104791779A (en) * | 2015-04-16 | 2015-07-22 | 无锡锡能锅炉有限公司 | Ignition-under-bed combustion device with air cooling structure for circulating fluidized bed boiler |
| CN105485676A (en) * | 2016-01-13 | 2016-04-13 | 唐山金沙燃烧热能科技有限公司 | Liquid slagging type low-nitrogen powder combustor |
| CN106352363A (en) * | 2016-08-31 | 2017-01-25 | 吕宜德 | Industrial boiler low-nitric-oxide combustion and environment protection system and technological method |
| CN106642084A (en) * | 2016-12-08 | 2017-05-10 | 哈尔滨工业大学 | Dual-register strong vortex melting combustor |
| CN110270462A (en) * | 2019-08-01 | 2019-09-24 | 湖南星沙机床设备有限公司 | A kind of finishing system of section steel manufacture crane subsidiary arm |
| CN110715292A (en) * | 2019-11-15 | 2020-01-21 | 徐州科能燃烧控制科技有限公司 | Spiral-flow type combustor |
| CN111059529A (en) * | 2020-01-02 | 2020-04-24 | 吉林大学 | Ear-cap type high-temperature-resistant premixed combustion nozzle and control method thereof |
| CN111853769A (en) * | 2020-08-15 | 2020-10-30 | 广东海洋大学 | Heat conduction oil cooling type low NOxCooling system and cooling method for pulverized coal burner |
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| CN114963168A (en) * | 2022-06-27 | 2022-08-30 | 杭州富丽达热电有限公司 | Clean coal high-efficient burner |
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| CN103015358B (en) * | 2011-09-23 | 2016-05-04 | 金朝晖 | For gas generator and the corresponding deicing equipment of deicing |
| CN103015358A (en) * | 2011-09-23 | 2013-04-03 | 金朝晖 | Combustion gas generator used for removing ice and snow and corresponding ice and snow removing equipment |
| CN104791779A (en) * | 2015-04-16 | 2015-07-22 | 无锡锡能锅炉有限公司 | Ignition-under-bed combustion device with air cooling structure for circulating fluidized bed boiler |
| CN105485676A (en) * | 2016-01-13 | 2016-04-13 | 唐山金沙燃烧热能科技有限公司 | Liquid slagging type low-nitrogen powder combustor |
| CN106352363A (en) * | 2016-08-31 | 2017-01-25 | 吕宜德 | Industrial boiler low-nitric-oxide combustion and environment protection system and technological method |
| CN106642084A (en) * | 2016-12-08 | 2017-05-10 | 哈尔滨工业大学 | Dual-register strong vortex melting combustor |
| CN106642084B (en) * | 2016-12-08 | 2019-07-26 | 哈尔滨工业大学 | It is a kind of double that wind is adjusted to be vortexed by force melting burner |
| CN110270462B (en) * | 2019-08-01 | 2024-03-22 | 湖南星沙机床设备有限公司 | Coating system for manufacturing crane auxiliary arm by section steel |
| CN110270462A (en) * | 2019-08-01 | 2019-09-24 | 湖南星沙机床设备有限公司 | A kind of finishing system of section steel manufacture crane subsidiary arm |
| CN110715292A (en) * | 2019-11-15 | 2020-01-21 | 徐州科能燃烧控制科技有限公司 | Spiral-flow type combustor |
| CN111059529A (en) * | 2020-01-02 | 2020-04-24 | 吉林大学 | Ear-cap type high-temperature-resistant premixed combustion nozzle and control method thereof |
| CN111059529B (en) * | 2020-01-02 | 2024-09-17 | 吉林大学 | Earcap type high-temperature-resistant premixed combustion nozzle and control method thereof |
| CN111853769A (en) * | 2020-08-15 | 2020-10-30 | 广东海洋大学 | Heat conduction oil cooling type low NOxCooling system and cooling method for pulverized coal burner |
| CN111853768A (en) * | 2020-08-15 | 2020-10-30 | 广东海洋大学 | Spiral coil cooling type low NOxPulverized coal burner |
| CN114963168A (en) * | 2022-06-27 | 2022-08-30 | 杭州富丽达热电有限公司 | Clean coal high-efficient burner |
| CN114963168B (en) * | 2022-06-27 | 2022-11-29 | 杭州富丽达热电有限公司 | Clean coal high-efficient burner |
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