CN105570884A - Multistage air duct ignition system of circulating fluidized bed boiler - Google Patents
Multistage air duct ignition system of circulating fluidized bed boiler Download PDFInfo
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- CN105570884A CN105570884A CN201610092276.6A CN201610092276A CN105570884A CN 105570884 A CN105570884 A CN 105570884A CN 201610092276 A CN201610092276 A CN 201610092276A CN 105570884 A CN105570884 A CN 105570884A
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- air
- air duct
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- ignition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q13/00—Igniters not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a multistage air duct ignition system of a circulating fluidized bed boiler. The multistage air duct ignition system comprises an inlet air duct, a main air duct, an outlet air duct, a first-stage air duct ignition unit and at least one second-stage air duct ignition unit. The inlet air duct is connected with a primary air duct of an outlet of a preheater and the main air duct, and an inlet air duct main air door is arranged on an inlet. The main air duct is connected with the inlet air duct and the outlet air duct, a main air duct air door is arranged on an inlet, and the outlet air duct is connected with the main air duct and a boiler under-bed water cooling air chamber. The first-stage air duct ignition unit comprises a first-stage air duct ignition combustor, a first-stage air duct and a first-stage air duct air door, the first-stage air duct and the main air duct are arranged in a parallel manner, and the first-stage air duct ignition combustor is arranged in the main air duct and connected with the first-stage air duct. The second-stage air duct ignition unit comprises a second-stage air duct ignition combustor, a second-stage air duct and a second-stage air duct air door, the second-stage air duct, the main air duct and the first-stage air duct are arranged in parallel, and the second-stage air duct ignition combustor is arranged in the main air duct and located at the downstream position of the primary air duct ignition combustor and is connected with the second-stage air duct.
Description
Technical field
The present invention relates to ignition of the boiler technical field, more particularly, relate to a kind of CFB Boiler road multistep ignition system.
Background technology
Current, China is the country that recirculating fluidized bed (CFB) boiler generating set quantity is maximum, total installation of generating capacity is maximum, with the fastest developing speed in the world, and recirculating fluidized bed (CFB) boiler generating set is widely used in China.
Recirculating fluidized bed (CFB) boiler ignition start, general employing bed go to bed the second line of a couplet chalaza fire, light a fire based on bed lower air duct, bed lower air duct ignition system is the visual plant of recirculating fluidized bed (CFB) boiler ignition start, low-load combustion-stabilizing, because its igniting heat utilization ratio is high, the features such as ignition trigger speed is fast, are widely used in large-scale fluidized bed (CFB) boiler always.
But, along with the raising of recirculating fluidized bed (CFB) boiler capacity in recent years, the igniting input heat needed constantly increases, and the ignition system of centralized arrangement air-channel ignition burner in use also exposes many problems, mainly comprises: 1, the easy local overheating of ignition air duct; 2, ignition air duct refractory material scorification, to come off; 3, air-channel ignition burner floor space is increasing, difficult arrangement etc.
Summary of the invention
In order to solve problems of the prior art, the object of this invention is to provide and a kind ofly can prevent ignition air duct local overheating and reduce the CFB Boiler road multistep ignition system of structural configuration difficulty.
The invention provides a kind of CFB Boiler road multistep ignition system, described multistep ignition system comprises inlet conduits, main air duct, outlet conduits and one-level air channel igniting unit and at least one secondary air channel igniting unit, wherein, described inlet conduits connects an air channel of preheater outlet and main air duct and is provided with the total air door of inlet conduits in porch, described main air duct connects inlet conduits with outlet conduits and porch is provided with main air duct air door, water cooled wind chamber under described outlet conduits connection main air duct and boiler bed; The one-level air channel that described one-level air channel igniting unit comprises one-level air-channel ignition burner, be arranged in parallel with described main air duct and the one-level air door of air duct being arranged on porch, described one-level air channel, described one-level air-channel ignition burner to be arranged on described main air duct and to be connected with described one-level air channel; The secondary air channel that described secondary air channel igniting unit comprises secondary air-channel ignition burner, be arranged in parallel with described main air duct and one-level air channel and the secondary air door of air duct being arranged on porch, described secondary air channel, described secondary air-channel ignition burner to be arranged on main air duct and to be positioned at the downstream of described one-level air-channel ignition burner, is connected with described secondary air channel simultaneously.
According to an embodiment of CFB Boiler road of the present invention multistep ignition system, in described inlet conduits, be also provided with entrance wind-warm syndrome measuring unit and inlet conduits total blast volume measuring unit.
According to an embodiment of CFB Boiler road of the present invention multistep ignition system, in described main air duct, be also provided with main air duct air measuring unit.
According to an embodiment of CFB Boiler road of the present invention multistep ignition system, described one-level air channel igniting unit also comprises the one-level air-channel ignition burner air measuring unit be arranged in one-level air channel and the one-level air-channel ignition burner be arranged in main air duct outlet wind-warm syndrome measuring unit.
According to an embodiment of CFB Boiler road of the present invention multistep ignition system, described secondary air channel igniting unit also comprises the secondary air-channel ignition burner air measuring unit be arranged in secondary air channel and the secondary air-channel ignition burner be arranged in main air duct outlet wind-warm syndrome measuring unit.
According to an embodiment of CFB Boiler road of the present invention multistep ignition system, in described outlet conduits, be also provided with outlet air measuring unit and outlet wind-warm syndrome measuring unit.
According to an embodiment of CFB Boiler road of the present invention multistep ignition system, at least one secondary air-channel ignition burner interval of at least one secondary air channel igniting unit described to be arranged on main air duct and to be positioned at the downstream of described one-level air-channel ignition burner successively.
Compared with prior art, the present invention is by hierarchical arrangement start-up burner, and dispersion input point is intimately measured, and makes air-channel ignition burner input heat more even, progressively improves igniting wind-warm syndrome, reach ignition trigger requirement; Be furnished with air quantity measuring point at every grade of air-channel ignition burner entrance simultaneously, outlet is furnished with temperature point, for feeding back a hot blast situation after this grade of start-up burner heating, convenient adjustment next stage start-up burner input heat, thus reach the uniform effect of temperature rise in ignition air duct, can effectively prevent ignition air duct local overheating, refractory material scorification, the problem such as come off.For large-size circulating fluidized bed (CFB) boiler, by dispersed placement air-channel ignition burner, can space be made full use of, reduce air-channel ignition burner floor space, reduce structural configuration difficulty.
Accompanying drawing explanation
Fig. 1 shows the syndeton schematic diagram of CFB Boiler road multistep ignition system according to an exemplary embodiment of the present invention.
Fig. 2 shows the structural representation of CFB Boiler road multistep ignition system according to an exemplary embodiment of the present invention.
Description of reference numerals:
1-inlet conduits, the total air door of 11-inlet conduits, 12-entrance wind-warm syndrome measuring unit, 13-inlet conduits total blast volume measuring unit, 2-one-level air channel igniting unit, 21-one-level air door of air duct, 22-main air duct air door, 23-one-level air-channel ignition burner air measuring unit, 24-main air duct air measuring unit, 25-one-level air-channel ignition burner, 26-one-level air-channel ignition burner outlet wind-warm syndrome measuring unit, 27-one-level air channel, 3-secondary air channel igniting unit, 31-secondary air door of air duct, 32-secondary air-channel ignition burner air measuring unit, 33-secondary air-channel ignition burner, 34-secondary air channel, 35-secondary air-channel ignition burner outlet wind-warm syndrome measuring unit, 4-outlet conduits, 41-exports air measuring unit, 42-exports wind-warm syndrome measuring unit, 5-preheater, water cooled wind chamber under 6-boiler bed, 7-air channel, 8-main air duct.
Detailed description of the invention
All features disclosed in this description, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this description (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Be described in detail to the structure of CFB Boiler road of the present invention multistep ignition system and principle below.CFB Boiler road of the present invention multistep ignition system is intimately measured by multi-stage air channel start-up burner dispersion input point, makes ignition system temperature rise in whole ignition trigger process in air channel more even.
Fig. 1 shows the syndeton schematic diagram of CFB Boiler road multistep ignition system according to an exemplary embodiment of the present invention, and Fig. 2 shows the structural representation of CFB Boiler road multistep ignition system according to an exemplary embodiment of the present invention.
As depicted in figs. 1 and 2, according to exemplary embodiment of the present invention, described CFB Boiler road multistep ignition system comprises inlet conduits 1, main air duct 8, outlet conduits 4 and one-level air channel igniting unit 2 and at least one secondary air channel igniting unit 3.That is, can according to actual conditions in engineering reality, consider multistage (three grades, even level Four) air-channel ignition burner ignition system, now then classification arranges multiple secondary air channels igniting unit 3.
Wherein, inlet conduits 1 connects an air channel 7 that preheater 5 exports with main air duct 8 and is provided with the total air door 11 of inlet conduits in porch, main air duct 8 connects inlet conduits 1 with outlet conduits 4 and porch is provided with main air duct air door 22, and outlet conduits 4 connects main air duct 8 and water cooled wind chamber 6 under boiler bed.
Preferably, in inlet conduits, 1 is also provided with entrance wind-warm syndrome measuring unit 12 and inlet conduits total blast volume measuring unit 13, to examine the initial conditions of ignition system, and ventilation of namely lighting a fire and an igniting wind-warm syndrome.More preferably, in main air duct 8, be also provided with main air duct air measuring unit 24, to test the ventilation at main-inlet place.
According to exemplary embodiment of the present invention, the one-level air channel 27 that one-level air channel igniting unit 2 comprises one-level air-channel ignition burner 25, be arranged in parallel with main air duct 8 and the one-level air door of air duct 21 being arranged on porch, one-level air channel 27, one-level air-channel ignition burner 25 to be arranged on main air duct 8 and to be connected with one-level air channel 27.
The secondary air channel 34 that secondary air channel igniting unit 3 comprises secondary air-channel ignition burner 33, be arranged in parallel with main air duct 8 and one-level air channel 27 and the secondary air door of air duct 31 being arranged on porch, secondary air channel 34, secondary air-channel ignition burner 33 to be arranged on main air duct 8 and to be positioned at the downstream of one-level air-channel ignition burner 25, is connected with secondary air channel 34 simultaneously.
During ignition of the boiler, close main air duct air door 22 and secondary air door of air duct 31 and retain a little cooling air, the total air door 11 of adjustment inlet conduits, one-level air door of air duct 21 ensure the excess air coefficient of one-level air-channel ignition burner 25 air distribution, to meet design wind speed, make the outlet wind-warm syndrome of one-level air-channel ignition burner 25 within zone of reasonableness.When one-level air channel igniter 2 puts into operation successfully and after stable operation, the total air door 11 of adjustment inlet conduits, secondary air door of air duct 31 ensure the excess air coefficient of secondary air-channel ignition burner 33 air distribution, to meet design wind speed, make ignition system export wind-warm syndrome and meet boiler ignition start demand.
Preferably, one-level air channel igniting unit 2 also comprises the one-level air-channel ignition burner air measuring unit 23 be arranged in one-level air channel 27 and the one-level air-channel ignition burner outlet wind-warm syndrome measuring unit 26 be arranged in main air duct 8, whether meet the demands with the wind-warm syndrome and air quantity of examining one-level air-channel ignition burner entrance and exit, for feeding back a hot blast situation after this grade of start-up burner heating, convenient adjustment start-up burner input heat, thus reach the uniform effect of temperature rise in whole ignition air duct.Similarly, secondary air channel igniting unit 3 preferably also comprises the secondary air-channel ignition burner air measuring unit 32 be arranged in secondary air channel 34 and the secondary air-channel ignition burner wind-warm syndrome measuring unit 35 be arranged in main air duct 8, whether meet the demands with the wind-warm syndrome of the air quantity and outlet of examining secondary air-channel ignition burner entrance, for feeding back a hot blast situation after this grade of start-up burner heating, convenient adjustment start-up burner input heat, thus reach the uniform effect of temperature rise in whole ignition air duct.In fact, the entrance wind-warm syndrome in one-level air channel and secondary air channel all can be recorded by entrance wind-warm syndrome measuring unit 12.
Further, be also preferably provided with outlet air measuring unit 41 and outlet wind-warm syndrome measuring unit 42 in outlet conduits 4, whether meet boiler ignition start demand for outlet wind-warm syndrome, the air quantity examining ignition system.Wherein, whether afterbody secondary air channel igniting unit 3 can not arrange secondary air-channel ignition burner wind-warm syndrome measuring unit 35, and directly adopt the outlet wind-warm syndrome measuring unit 42 arranged in outlet conduits 4 to meet the demands to the wind-warm syndrome examining the outlet of secondary air-channel ignition burner.
When needs arrange at least one secondary air channel igniting unit 3, at least one secondary air-channel ignition burner 33 interval of at least one secondary air channel igniting unit 3 to be arranged on main air duct 8 and to be positioned at the downstream of one-level air-channel ignition burner 25 successively.By dispersed placement multi-stage air channel start-up burner, can space be made full use of, reduce the floor space of air-channel ignition burner, reduce structural configuration difficulty.
Structure and the mode of operation of CFB Boiler road multistep ignition system in the present invention are described below in conjunction with concrete example.
See attached Fig. 1 and 2, for 600MW recirculating fluidized bed (CFB) boiler, boiler adopts 2 cover CFB Boiler road of the present invention multistep ignition systems, and often overlap multistep ignition Operation system setting two-stage air channel, air channel igniting unit, every grade of igniting unit comprises two start-up burners.
The CFB Boiler road multistep ignition system of this example is during ignition of the boiler, and the step that puts into operation is as follows:
1) ignition system initial conditions is examined by the total air door 11 of inlet conduits, entrance wind-warm syndrome measuring unit 12 and the inlet conduits total blast volume measuring unit 13 be arranged on inlet conduits 1, ventilation of namely lighting a fire, an igniting wind-warm syndrome;
2) close main air duct air door 22 and secondary air door of air duct 31 and retain a little cooling air, observing cooling air quantity by main air duct air measuring unit 24 and secondary air-channel ignition burner air measuring unit 32; Observe one-level air-channel ignition burner air measuring unit 23 measured value and coordinate and regulate the total air door 11 of inlet conduits and one-level air door of air duct 21, ensure the excess air coefficient of one-level air-channel ignition burner 25 air distribution, to meet its design wind speed; When one-level air-channel ignition burner 25 puts into operation successfully and after stable operation, observe temperature value by one-level air-channel ignition burner outlet wind-warm syndrome measuring unit 26 and whether meet design load, if satisfied adjustment one-level air-channel ignition burner 25 is exerted oneself and made it meet, then prepare startup secondary air-channel ignition burner 33 if meet;
3) regulate the total air door 11 of inlet conduits and secondary air door of air duct 31 by observing secondary air-channel ignition burner apparatus for measuring air quantity 32 measured value and coordinating, ensure the excess air coefficient of secondary air-channel ignition burner 33 air distribution, to meet its design wind speed; When secondary air-channel ignition burner 33 puts into operation successfully and after stable operation, by observing the temperature value of outlet wind-warm syndrome measuring unit 42, whether the airflow value of outlet air measuring unit 41 meets design load, makes it meet if satisfied then adjustment secondary air-channel ignition burner 33 is exerted oneself.
4) when after the stable operation of two-stage air-channel ignition burner, the flue gas of about 900 DEG C will be formed at outlet conduits 4, water cooled wind chamber 6 under boiler bed is sent into by outlet conduits 4, sprayed by grid plate hood again, make boiler bed stream and add hott bed material to reach coal tossing temperature, then send into fire coal, formed after stablizing bed temperature and terminate ignition process.
The CFB Boiler road multistep ignition system of this example is at boiler normal operation period, close one-level air door of air duct 21 and secondary air door of air duct 31 and retain a little cooling air, by the adjustment regulating the total air door 11 of inlet conduits and main air duct air door 22 to carry out boiler First air.
To sum up, the present invention is by hierarchical arrangement air-channel ignition burner, and dispersion input point is intimately measured, and makes air-channel ignition burner input heat more even, the problem such as effectively can prevent ignition air duct local overheating and refractory material scorification, come off.Further, dispersed placement air-channel ignition burner, can make full use of space, reduces air-channel ignition burner floor space, reduces structural configuration difficulty.Adopt said structure, complete igniting by the input of ignition trigger condition, air-channel ignition burner, result exports, a series of means such as input adjustment, circulating fluid-bed (CFB) ignition of the boiler can be allowed to stride forward to intellectuality, one-touch startup.
The present invention is not limited to aforesaid detailed description of the invention.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (7)
1. a CFB Boiler road multistep ignition system, is characterized in that, described multistep ignition system comprises inlet conduits, main air duct, outlet conduits and one-level air channel igniting unit and at least one secondary air channel igniting unit, wherein,
Described inlet conduits connects an air channel of preheater outlet and main air duct and is provided with the total air door of inlet conduits in porch, described main air duct connects inlet conduits with outlet conduits and porch is provided with main air duct air door, water cooled wind chamber under described outlet conduits connection main air duct and boiler bed;
The one-level air channel that described one-level air channel igniting unit comprises one-level air-channel ignition burner, be arranged in parallel with described main air duct and the one-level air door of air duct being arranged on porch, described one-level air channel, described one-level air-channel ignition burner to be arranged on main air duct and to be connected with one-level air channel;
The secondary air channel that described secondary air channel igniting unit comprises secondary air-channel ignition burner, be arranged in parallel with described main air duct and one-level air channel and the secondary air door of air duct being arranged on porch, described secondary air channel, described secondary air-channel ignition burner to be arranged on main air duct and to be positioned at the downstream of described one-level air-channel ignition burner, is connected with described secondary air channel simultaneously.
2. CFB Boiler road according to claim 1 multistep ignition system, is characterized in that, is also provided with entrance wind-warm syndrome measuring unit and inlet conduits total blast volume measuring unit in described inlet conduits.
3. CFB Boiler road according to claim 1 multistep ignition system, is characterized in that, is also provided with main air duct air measuring unit in described main air duct.
4. CFB Boiler road according to claim 1 multistep ignition system, it is characterized in that, described one-level air channel igniting unit also comprises the one-level air-channel ignition burner air measuring unit be arranged in one-level air channel and the one-level air-channel ignition burner be arranged in main air duct outlet wind-warm syndrome measuring unit.
5. CFB Boiler road according to claim 1 multistep ignition system, it is characterized in that, described secondary air channel igniting unit also comprises the secondary air-channel ignition burner air measuring unit be arranged in secondary air channel and the secondary air-channel ignition burner be arranged in main air duct outlet wind-warm syndrome measuring unit.
6. CFB Boiler road according to claim 5 multistep ignition system, is characterized in that, is also provided with outlet air measuring unit and outlet wind-warm syndrome measuring unit in described outlet conduits.
7. CFB Boiler road according to claim 1 multistep ignition system, it is characterized in that, at least one secondary air-channel ignition burner interval of at least one secondary air channel igniting unit described to be arranged on main air duct and to be positioned at the downstream of described one-level air-channel ignition burner successively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610092276.6A CN105570884B (en) | 2016-02-19 | 2016-02-19 | A kind of CFB Boiler road multistep ignition system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610092276.6A CN105570884B (en) | 2016-02-19 | 2016-02-19 | A kind of CFB Boiler road multistep ignition system |
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| CN105570884A true CN105570884A (en) | 2016-05-11 |
| CN105570884B CN105570884B (en) | 2017-10-27 |
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Citations (8)
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|---|---|---|---|---|
| US4344372A (en) * | 1980-06-30 | 1982-08-17 | Aqua-Chem, Inc. | Fluidized bed combustion device |
| JPH10325510A (en) * | 1997-05-23 | 1998-12-08 | Ishikawajima Harima Heavy Ind Co Ltd | Burner device for starting of pressure fluidized bed boiler |
| CN101476720A (en) * | 2008-11-11 | 2009-07-08 | 烟台双强燃烧控制工程有限公司 | Ignition device under circulating sulfuration bed of boiler |
| CN102287828A (en) * | 2011-07-22 | 2011-12-21 | 东方电气集团东方锅炉股份有限公司 | Air-channel ignition burner |
| CN203454115U (en) * | 2013-09-10 | 2014-02-26 | 鞍山锅炉厂有限公司 | Quick starting low-heat-storage ring-cooling-air ignition burning system device |
| CN204478035U (en) * | 2014-12-20 | 2015-07-15 | 无锡东马锅炉有限公司 | CFBB First air air-supply arrangement |
| CN105042577A (en) * | 2015-07-14 | 2015-11-11 | 河南科技大学 | Circulating fluidized bed boiler |
| CN205402694U (en) * | 2016-02-19 | 2016-07-27 | 东方电气集团东方锅炉股份有限公司 | Hierarchical ignition system in circulating fluidized bed boiler wind channel |
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2016
- 2016-02-19 CN CN201610092276.6A patent/CN105570884B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4344372A (en) * | 1980-06-30 | 1982-08-17 | Aqua-Chem, Inc. | Fluidized bed combustion device |
| JPH10325510A (en) * | 1997-05-23 | 1998-12-08 | Ishikawajima Harima Heavy Ind Co Ltd | Burner device for starting of pressure fluidized bed boiler |
| CN101476720A (en) * | 2008-11-11 | 2009-07-08 | 烟台双强燃烧控制工程有限公司 | Ignition device under circulating sulfuration bed of boiler |
| CN102287828A (en) * | 2011-07-22 | 2011-12-21 | 东方电气集团东方锅炉股份有限公司 | Air-channel ignition burner |
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| CN204478035U (en) * | 2014-12-20 | 2015-07-15 | 无锡东马锅炉有限公司 | CFBB First air air-supply arrangement |
| CN105042577A (en) * | 2015-07-14 | 2015-11-11 | 河南科技大学 | Circulating fluidized bed boiler |
| CN205402694U (en) * | 2016-02-19 | 2016-07-27 | 东方电气集团东方锅炉股份有限公司 | Hierarchical ignition system in circulating fluidized bed boiler wind channel |
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