CN1151001A - Controllable gradation separating spiral-flow powdered coal burning method and device - Google Patents
Controllable gradation separating spiral-flow powdered coal burning method and device Download PDFInfo
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- CN1151001A CN1151001A CN 95119616 CN95119616A CN1151001A CN 1151001 A CN1151001 A CN 1151001A CN 95119616 CN95119616 CN 95119616 CN 95119616 A CN95119616 A CN 95119616A CN 1151001 A CN1151001 A CN 1151001A
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Abstract
A powdered coal swirl combustion method features that an inertial separation formed by installing impact ring in primary wind pipe makes the powdered coal flow have density distribution of internal-high-external-low. Its apparatus is composed of primary wind pipe with impact ring and cylindrical partition to form high-density and low-density wind pipes, and swirl blade wheel at outlet of low-density wind pipe. Its advantages include stable combustion, low-load stability and simple structure.
Description
The present invention relates to coal dust combustion method and device, relate in particular to controllable gradation separating spiral-flow powdered coal burning method and device.
China is a big coal country, is again consumption coal big country, and coal accounts for more than 25% of primary energy total burn-off, and is used for boiler combustion, and particularly generating plant pulverized coal boiler accounts for the whole nation more than 85%.But then, though coal resources in China is abundant, the fat coal reserves are few, and colm still accounts for significant proportion, and along with the continuous exploitation of coal, ature of coal is continuous downward trend, and this just has higher requirement to boiler combustion technology.
China's power boiler burning subject matter is at present:
(1) because of the obvious increase of the kind and the quantity of colm, brings difficulty,, satisfy safe operation of the boiler, must consume a large amount of fuel oil in order to reach steady combustion purpose to boiler startup igniting and low-load combustion-stabilizing.According to statistics, a 670T/H pulverized-coal fired boiler is used for combustion-supporting fuel oil more than 1000 tons every year, appropriate litigation fees is considerable, both increased cost of electricity-generating, wasted the oily resource of a large amount of preciousnesses again, and along with developing rapidly of China's industrial economy, more power plant will face underload peak regulation task, and this problem will be more outstanding.In addition,, increase the ash erosion possibility, have a strong impact on the safe and economical boiler operation because of coal is changeable.Moreover along with the attention of China's environmental pollution problem, station boiler carries out combustion with reduced pollutants also will solve object as emphasis, and China's overwhelming majority boiler does not have consideration effectively to suppress low pollution emission measure, particularly low NOx drainage.
According to investigations, turbulent burner also occupies certain ratio at China's station boiler and other combustion field, accounts for station boiler about 20%, and particularly old-fashioned boiler applications is more general, but and old-fashioned boiler exist above-mentioned problem condition even more serious.The pulverized coal whirl burning device is to utilize recirculating zone backrush high temperature heat source, makes the quick ignition of breeze airflow and reaches steady combustion purpose.But, secondary wind makes breeze airflow follow secondary wind rotation to cause pulverized coal particle radial motion in the air-flow owing to rotating (breeze airflow also has the rotation situation) strongly, cause coal powder density and high temperature gas flow not to match away from the reflux thermal source that catches fire of center, and the steady combustion performance of catching fire is descended, weaken its due advantage.When particularly running into low-volatile coal and colm, it is combustion-supporting often to need to throw oil.In addition, because of the turbulent burner primary and secondary air mix strong, burning oxygen supply abundance and ignition temperature peak value height, the NOx growing amount is bigger by about 20～30% than general DC burner, reaches 500～600PPm.Therefore, developing a kind of new coal powder turbulent burner is very urgent to address the above problem, and has important society, economy, environment and Practical significance.Developed some new technologies and device abroad in succession, broadcast mill Co., Ltd. as Japanese Ishikawa island and developed IHI WR-PC burner and add a horizontal separator at burner and reach deep or light separation purpose, solved the low-load combustion-stabilizing purpose with this.But its investment for trnasforming urban land and workload are big, and whole device resistance is higher, and operation is regulated complicated.Two in addition to transfer the wind turbulent burners mainly be to low NOx drainage, as a series of pairs of accent vortex burners of U.S. FW company exploitation etc.Also there is the regulating measure complexity in this class burner, invests big shortcoming, draws a cold wind separately as the PAX burner of U.S. FW company, replaces hot secondary wind again, and structure and adjusting are all complicated.
The purpose of this invention is to provide a kind of controllable gradation separating spiral-flow powdered coal burning method and device.
The present invention takes following measures in order to achieve the above object.Method is the inertial separation method of the annular ram of installing in wind airduct of burner, and breeze airflow is concentrated, and forms interior dense outer light CONCENTRATION DISTRIBUTION, and with cylindrical partition a wind airduct is separated into internal high-density wind airduct and external low-density wind airduct.Device is a wind airduct and a wind air channel, is provided with central tube in the wind airduct, is provided with torch oil gun in the central tube, and one time the wind airduct is provided with secondary wind airduct and secondary wind air channel outward, is provided with the eddy flow impeller in secondary wind airduct, and regulates with pull bar.Be provided with annular ram at a wind airduct inwall, in a wind airduct, be provided with cylindrical partition, a wind airduct is divided into internal high-density wind airduct and external low-density wind airduct, and the place is provided with the eddy flow impeller at the external low-density wind wind tube outlet, is provided with air balance spare in the cylindrical partition end.
Advantage of the present invention:
(1) realized combustion stability and low-load combustion-stabilizing,, had remarkable result particularly at colm; (2) coal adaptability is wide, can effectively prevent coking; (3) realize low NOx combustion, reduce pollution emissions; (4) separator is simple, operation and easy to adjust; (5) transformation or investment cost are few, and various types of turbulent burners all can be transformed or be redesigned.
Elaborate below in conjunction with accompanying drawing.
Fig. 1 is an I type controllable gradation separating spiral-flow powdered coal burning apparatus structure schematic diagram;
Fig. 2 is an II type controllable gradation separating spiral-flow powdered coal burning apparatus structure schematic diagram.
The controllable gradation separating spiral-flow powdered coal burning device comprises a wind airduct 25 and a wind wind Be provided with center pipe 12 in 10, the wind airducts in road, be provided with torch oil gun in the pipe of center, a wind Airduct is provided with Secondary Air airduct 11 and Secondary Air air channel 6 outward, is provided with eddy flow in the Secondary Air airduct Impeller 8, and with pull bar 9 adjustings, it is characterized in that being provided with annular at a wind airduct inwall hits Hit part 1, in a wind airduct, be provided with cylindrical partition 2 a wind airduct is divided into internal high-density wind Airduct 3 and external low-density wind airduct 4, the place is provided with eddy flow impeller 7 at the external low-density wind wind tube outlet, The cylindrical partition end is provided with air balance spare 21. The cylindrical partition exit is provided with annular cone 5, Cylindrical partition is provided with the balance hole. The outer interlayer airduct 13 that is provided with of center pipe, through bypass pipe 24 with The Secondary Air air channel communicates, and regulates with control valve 23, is provided with adjustable ventilation door at the interlayer airduct 15. The Secondary Air airduct is provided with outer second air airduct 19 outward, communicates with the Secondary Air air channel and with transferring Joint valve 20 is regulated. Interlayer wind tube outlet place is provided with and expands cone mouth 16, at a wind wind tube outlet The place is provided with and expands cone mouth 17. One time the wind airduct is provided with adjustable ventilation door 14. Annular bump part passes through Pull bar [22] is regulated. Annular bump part 1 and balance element 21 can be arranged on wind air channel 10 one time In.
Embodiment 1:
See Fig. 1, wind coal dust is divided into two strands of dense, thin powdered coal air-flows that coal powder density is widely different through annular ram after entering wind airduct, enters internal high-density wind airduct 3 and external low-density wind airduct 4 respectively.These two passages separate with cylindrical partition, have balance pipe on the dividing plate, are used for improving the air velocity that may cause or the difference of pressure.At the toroidal membrane outlet side annular cone 5 is set and is used for postponing mixing dense, the thin powdered coal air-flow, overfiren air port forms a strong inverse flow district through movable eddy flow impeller 8 at burner outlet, the backrush high-temperature flue gas, when regulating secondary wind swirl strength, can adjust burner outlet high temperature recirculation zone size and light phase breeze airflow jet extended corner, and utilize cone to guarantee when the dense phase pulverized coal air-flow enters high temperature recirculation zone, to sneak into less light phase breeze airflow as far as possible.Thereby form high temperature, high coal powder density zone, reach and catch fire fast and the low-load combustion-stabilizing purpose.When coal changes, the pull bar that can utilize separator to put moves axially separator and regulates deep or light separating effect, reach the purpose that controlled coal powder light-dark separates,, adapt to that different coals are caught fire and the low-load combustion-stabilizing requirement again in conjunction with secondary wind swirl strength.In addition, because of radially being respectively the thick coal culm air-flow from inside to outside at burner outlet, thin powdered coal air-flow and secondary wind when using high-quality bituminous coal and high load capacity after binomial can effectively guarantee the spout noncoking.
In addition, carry out combustion with meagre oxygen because of the coal dust high concentration, can effectively suppress the formation of NOx, reduce the NOx concentration of emission, reach high-efficiency low-pollution smooth combustion purpose at the initial stage of catching fire.In addition, central tube 12 is arranged at the center, place oil gun.
Embodiment 2:
See Fig. 1, on central tube, increase interlayer airduct 13, supply with by drawing one wind on the secondary air channel.In addition, be communicated with the external low-density wind airduct, be communicated with internal high-density wind wind but on interlayer sieve pipe, also offer air register 15 but offer air register 14 at secondary wind eddy flow impeller primary air separating duct mouth.
Other structure of present embodiment and operation principle are with embodiment 1, improvements are to change when coal, as use the high-quality fat coal, or during heavy-duty service, can make secondary hot-air enter dense, thin powdered coal gas channel by air register 14,15, thereby reach controlled coal powder density and change the purpose that different load changes to adapt to different coals.Air door 14,15 adjustable size can be regulated the secondary hot-air flow that enters coal powder light-dark phase pipeline.
Embodiment 3:
See that Fig. 1 adds reamer 16 at a wind tube outlet, increase a wind enlarging 17 and secondary wind enlarging 18 respectively at airduct and secondary air channel mouth.
Other structure of present embodiment and operation principle are with embodiment 1,2, improvements are to change when coal combustion speciogenesis, as when using relatively poor coal, or during than underrun, can increase recirculating zone size and capacity of returns by enlarging, catch fire and the low-load combustion-stabilizing purpose thereby play to strengthen.
Embodiment 4:
See that Fig. 2 is divided into two former secondary air channel road, outer secondary wind 19 is direct current, interior secondary wind-force eddy flow, and inside and outside secondary wind air quantity can be regulated by control valve 20.
Other structure of present embodiment and operation principle are with embodiment 1,2,3, and improvements are that secondary air separating is inside and outside two strands, by regulating direct current secondary air adjustor valve door 20, can reach and change the swirl strength purpose, to adapt to different coal requirements, simultaneously, can reduce the NOx discharging with air stage feeding.
Claims (9)
1. controllable gradation separating spiral-flow powdered coal burning method, the inertial separation method that it is characterized in that the annular ram of installing in wind airduct of burner, breeze airflow is concentrated, form interior dense outer light CONCENTRATION DISTRIBUTION, and a wind airduct is separated into internal high-density wind airduct and external low-density wind airduct with cylindrical partition.
One kind according to the method described above the design the controllable gradation separating spiral-flow powdered coal burning device, it comprises a wind airduct [25] and a wind air channel [10], be provided with central tube [12] in the wind airduct, be provided with torch oil gun in the central tube, one time the wind airduct is provided with secondary wind airduct [11] and secondary wind air channel [6] outward, in secondary wind airduct, be provided with eddy flow impeller [8], and regulate with pull bar [9], it is characterized in that being provided with annular ram [1] at a wind airduct inwall, in a wind airduct, be provided with cylindrical partition [2] a wind airduct is divided into internal high-density wind airduct [3] and external low-density wind airduct [4], be provided with eddy flow impeller [7] at external low-density wind wind tube outlet place, be provided with air balance spare [21] in the cylindrical partition end.
3. a kind of controllable gradation separating spiral-flow powdered coal burning device of design according to the method described above according to claim 2 is characterized in that said cylindrical partition exit is provided with annular cone [5], and cylindrical partition is provided with balance pipe.
4. according to claim 2 or 3 described a kind of controllable gradation separating spiral-flow powdered coal burning devices of design according to the method described above, it is characterized in that outside said central tube, being provided with interlayer airduct [13], communicate with secondary wind air channel through bypass pipe [24], and regulate, but on the interlayer airduct, be provided with air register [15] with control valve [23].
5. according to claim 2 or 3 described a kind of controllable gradation separating spiral-flow powdered coal burning devices of design according to the method described above, it is characterized in that secondary wind airduct is provided with outer secondary wind airduct [19] outward, communicate with secondary wind air channel and regulate with control valve [20].
6. according to claim 2 or 3 described a kind of controllable gradation separating spiral-flow powdered coal burning devices of design according to the method described above, it is characterized in that being provided with reamer mouth [16], be provided with reamer mouth [17] at a wind wind tube outlet place at interlayer wind tube outlet place.
According to claim 2 or 3 described a kind of according to the method described above the design the controllable gradation separating spiral-flow powdered coal burning devices, but it is characterized in that a wind airduct is provided with air register [14].
8. according to claim 2 or 3 described a kind of controllable gradation separating spiral-flow powdered coal burning devices of design according to the method described above, it is characterized in that said annular ram is by pull bar [22] adjusting.
9. according to claim 2 or 3 described a kind of controllable gradation separating spiral-flow powdered coal burning devices of design according to the method described above, it is characterized in that said annular ram [1] and balance element [21] are located in the air channel [10].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95119616 CN1079524C (en) | 1995-11-24 | 1995-11-24 | Controllable gradation separating spiral-flow powdered coal burning method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95119616 CN1079524C (en) | 1995-11-24 | 1995-11-24 | Controllable gradation separating spiral-flow powdered coal burning method and device |
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| CN1151001A true CN1151001A (en) | 1997-06-04 |
| CN1079524C CN1079524C (en) | 2002-02-20 |
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| CN 95119616 Expired - Fee Related CN1079524C (en) | 1995-11-24 | 1995-11-24 | Controllable gradation separating spiral-flow powdered coal burning method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100549519C (en) * | 2007-09-25 | 2009-10-14 | 深圳东方锅炉控制有限公司 | A kind of vortex burner |
| CN100567816C (en) * | 2007-12-25 | 2009-12-09 | 杭州意能节能技术有限公司 | A kind of eddy flow powdered coal burner lit up by tiny oil with center wind |
| CN101427072B (en) * | 2006-05-17 | 2011-06-01 | 杭州意能节能技术有限公司 | A pulverized coal burner with a baffle |
| CN1920382B (en) * | 2006-09-04 | 2011-07-20 | 东方锅炉（集团）股份有限公司 | Rotational flow pulverized coal burner |
| CN103162289A (en) * | 2013-03-11 | 2013-06-19 | 扬州晨光特种设备有限公司 | Rotational flow stopping block type pulverized coal concentrator |
| CN104421933A (en) * | 2013-08-27 | 2015-03-18 | 神华集团有限责任公司 | Primary air pipe applicable to combustor, combustor and solid fuel boiler |
| CN104566357A (en) * | 2013-10-29 | 2015-04-29 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler |
| CN104566358A (en) * | 2013-10-29 | 2015-04-29 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler |
| CN106352331A (en) * | 2016-08-25 | 2017-01-25 | 施政 | Pulverized coal combustion system |
| CN111442263A (en) * | 2020-04-16 | 2020-07-24 | 哈尔滨锅炉厂有限责任公司 | Cyclone burner suitable for pulverized coal concentration separation of lignite |
| CN111947137A (en) * | 2020-08-27 | 2020-11-17 | 哈尔滨工业大学 | Oil secondary air assisted ignition self-stable combustion W flame boiler and self-stable combustion method |
| CN112963828A (en) * | 2021-03-31 | 2021-06-15 | 煤科院节能技术有限公司 | Pulverized coal oxygen-deficient gasification burner |
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| CN101427072B (en) * | 2006-05-17 | 2011-06-01 | 杭州意能节能技术有限公司 | A pulverized coal burner with a baffle |
| CN1920382B (en) * | 2006-09-04 | 2011-07-20 | 东方锅炉（集团）股份有限公司 | Rotational flow pulverized coal burner |
| CN100549519C (en) * | 2007-09-25 | 2009-10-14 | 深圳东方锅炉控制有限公司 | A kind of vortex burner |
| CN100567816C (en) * | 2007-12-25 | 2009-12-09 | 杭州意能节能技术有限公司 | A kind of eddy flow powdered coal burner lit up by tiny oil with center wind |
| CN103162289A (en) * | 2013-03-11 | 2013-06-19 | 扬州晨光特种设备有限公司 | Rotational flow stopping block type pulverized coal concentrator |
| CN104421933A (en) * | 2013-08-27 | 2015-03-18 | 神华集团有限责任公司 | Primary air pipe applicable to combustor, combustor and solid fuel boiler |
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| CN104566358A (en) * | 2013-10-29 | 2015-04-29 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler |
| CN104566358B (en) * | 2013-10-29 | 2017-02-08 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler |
| CN104566357A (en) * | 2013-10-29 | 2015-04-29 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler |
| CN106352331A (en) * | 2016-08-25 | 2017-01-25 | 施政 | Pulverized coal combustion system |
| CN111442263A (en) * | 2020-04-16 | 2020-07-24 | 哈尔滨锅炉厂有限责任公司 | Cyclone burner suitable for pulverized coal concentration separation of lignite |
| CN111947137A (en) * | 2020-08-27 | 2020-11-17 | 哈尔滨工业大学 | Oil secondary air assisted ignition self-stable combustion W flame boiler and self-stable combustion method |
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| CN113819461A (en) * | 2021-08-25 | 2021-12-21 | 西安交通大学 | Primary air concentration and dilution separation multistage cyclone burner and working method thereof |
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| CN1079524C (en) | 2002-02-20 |
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According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 95119616.2 of the invention patents in the current issue of authorization announcement, and at the same time corresponding to the 95227377.2 utility model patent to be given up, and in the 18 volume of the 8 issue of the new type of communique on the patent right to abandon the announcement. According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 95119616.2 of the invention patents in the current issue of authorization announcement, and at the same time corresponding to the 95227377.2 utility model patent to be given up, and in the 18 volume of the 8 issue of the new type of communique on the patent right to abandon the announcement. |
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