CN205402694U - Hierarchical ignition system in circulating fluidized bed boiler wind channel - Google Patents
Hierarchical ignition system in circulating fluidized bed boiler wind channel Download PDFInfo
- Publication number
- CN205402694U CN205402694U CN201620128472.XU CN201620128472U CN205402694U CN 205402694 U CN205402694 U CN 205402694U CN 201620128472 U CN201620128472 U CN 201620128472U CN 205402694 U CN205402694 U CN 205402694U
- Authority
- CN
- China
- Prior art keywords
- air duct
- air
- channel
- burner
- wind channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Air Supply (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model discloses a hierarchical ignition system in circulating fluidized bed boiler wind channel is including entry wind channel, main air duct, outlet conduit and one -level wind channel ignition unit and at least one second grade wind channel ignition unit, and the wind channel that the pre -heater export is connected in the entry wind channel is with the main air duct and be provided with the total air door in entry wind channel in the entrance, and be provided with the main air duct air door in the entrance, outlet conduit connects main air duct and boiler bed offal cold wind room with outlet conduit in main air duct joint access wind channel, one -level wind channel ignition unit include one -level wind channel ignition burner, with parallelly connected one -level wind channel and the one -level wind channel air door that sets up of main air duct, one -level wind channel ignition burner sets up in the main air duct and is connected with the one -level wind channel, second grade wind channel ignition unit include second grade wind channel ignition burner, with parallelly connected second grade wind channel and the second grade wind channel air door that sets up in main air duct and one -level wind channel, second grade wind channel ignition burner sets up in the main air duct and lies in one -level wind channel ignition burner's low reaches, is connected with the second grade wind channel simultaneously.
Description
Technical field
This utility model relates to ignition of the boiler technical field, more particularly, relates to a kind of CFB Boiler road multistep ignition system.
Background technology
Currently, 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, be generally adopted 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, owing to its ignition heat utilization rate is high, the features such as ignition trigger speed is fast, are widely used in large-scale fluidized bed (CFB) boiler always.
But, raising along with recirculating fluidized bed (CFB) boiler capacity in recent years, the igniting input heat needed is continuously increased, and the ignition system of centralized arrangement air-channel ignition burner in use also exposes many problems, specifically includes that 1, the easy local overheating of ignition air duct；2, ignition air duct refractory material scorification, come off；3, air-channel ignition burner floor space is increasing, difficult arrangement etc..
Utility model content
In order to solve problems of the prior art, the purpose of this utility model is to provide a kind of CFB Boiler road multistep ignition system being prevented from ignition air duct local overheating and reducing structure layout difficulty.
This utility model provides a kind of CFB Boiler road multistep ignition system, described multistep ignition system includes inlet conduits, main air duct, outlet conduits and one-level air channel igniting unit and at least one light breeze road igniting unit, wherein, described inlet conduits connects 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 and outlet conduits and is provided with main air duct air door in porch, and described outlet conduits connects main air duct and water cooled wind chamber under boiler bed；Described one-level air channel igniting unit includes one-level air-channel ignition burner and described main air duct is arranged in parallel one-level air channel 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 is arranged on described main air duct and is connected with described one-level air channel；Described light breeze road igniting unit includes light breeze road start-up burner and described main air duct and one-level air channel is arranged in parallel light breeze road and the light breeze road air door being arranged on porch, described light breeze road, described light breeze road start-up burner is arranged on main air duct and is positioned at the downstream of described one-level air-channel ignition burner, is connected with described light breeze road simultaneously.
An embodiment according to this utility model CFB Boiler road multistep ignition system, is additionally provided with entrance pathogenic wind-warm measuring unit and inlet conduits total blast volume measuring unit in described inlet conduits.
An embodiment according to this utility model CFB Boiler road multistep ignition system, is additionally provided with main air duct air measuring unit in described main air duct.
An embodiment according to this utility model CFB Boiler road multistep ignition system, described one-level air channel igniting unit also includes the one-level air-channel ignition burner air measuring unit being arranged in one-level air channel and the one-level air-channel ignition burner outlet pathogenic wind-warm measuring unit being arranged in main air duct.
An embodiment according to this utility model CFB Boiler road multistep ignition system, described light breeze road igniting unit also includes the light breeze road start-up burner air measuring unit being arranged in light breeze road and the light breeze road start-up burner outlet pathogenic wind-warm measuring unit being arranged in main air duct.
An embodiment according to this utility model CFB Boiler road multistep ignition system, is additionally provided with outlet air measuring unit and outlet pathogenic wind-warm measuring unit in described outlet conduits.
An embodiment according to this utility model CFB Boiler road multistep ignition system, at least one start-up burner interval, light breeze road of at least one light breeze road igniting unit described is arranged on main air duct and is sequentially located at the downstream of described one-level air-channel ignition burner.
Compared with prior art, this utility model passes through hierarchical arrangement start-up burner, dispersion input ignition heat, makes air-channel ignition burner input heat more uniform, steps up pathogenic wind-warm of igniting, reach ignition trigger requirement；It is provided with air quantity measuring point at every grade of air-channel ignition burner entrance simultaneously, outlet is provided with temperature point, for feeding back a hot blast situation after this grade of start-up burner heats, the convenient next stage start-up burner that adjusts inputs heat, thus reaching the uniform effect of temperature rise in ignition air duct, effectively preventing 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, it is possible to make full use of space, reduce air-channel ignition burner floor space, reduce structure and arrange difficulty.
Accompanying drawing explanation
Fig. 1 illustrates the attachment structure schematic diagram of the CFB Boiler road multistep ignition system according to this utility model exemplary embodiment.
Fig. 2 illustrates the structural representation of the CFB Boiler road multistep ignition system according to this utility model exemplary embodiment.
Description of reference numerals:
null1-inlet conduits、The total air door of 11-inlet conduits、12-entrance pathogenic wind-warm 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 pathogenic wind-warm measuring unit、27-one-level air channel、3-light breeze road igniting unit、31-light breeze road air door、32-light breeze road start-up burner air measuring unit、33-light breeze road start-up burner、34-light breeze road、35-light breeze road start-up burner outlet pathogenic wind-warm measuring unit、4-outlet conduits、41-exports air measuring unit、42-exports pathogenic wind-warm measuring unit、5-preheater、Water cooled wind chamber under 6-boiler bed、Air channel of 7-、8-main air duct.
Detailed description of the invention
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
This specification (include any accessory claim, summary and accompanying drawing) disclosed in any feature, unless specifically stated otherwise, all can by other equivalences or there is the alternative features of similar purpose replaced.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Structure and the principle of this utility model CFB Boiler road multistep ignition system will be described in detail below.CFB Boiler road of the present utility model multistep ignition system, by multi-stage air channel start-up burner dispersion input ignition heat, makes ignition system temperature rise in whole ignition trigger process in air channel more uniform.
Fig. 1 illustrates the attachment structure schematic diagram of the CFB Boiler road multistep ignition system according to this utility model exemplary embodiment, and Fig. 2 illustrates the structural representation of the CFB Boiler road multistep ignition system according to this utility model exemplary embodiment.
As depicted in figs. 1 and 2, according to exemplary embodiment of the present utility model, described CFB Boiler road multistep ignition system includes inlet conduits 1, main air duct 8, outlet conduits 4 and one-level air channel igniting unit 2 and at least one light breeze road igniting unit 3.That is, can according to practical situation in engineering reality, it is considered to multistage (three grades, even level Four) air-channel ignition burner ignition system, now then classification arranges multiple light breeze roads igniting unit 3.
Wherein, inlet conduits 1 connects the air channel 7 of preheater 5 outlet and 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 and outlet conduits 4 and is provided with main air duct air door 22 in porch, and outlet conduits 4 connects main air duct 8 and water cooled wind chamber 6 under boiler bed.
Preferably, in inlet conduits, 1 is additionally provided with entrance pathogenic wind-warm measuring unit 12 and inlet conduits total blast volume measuring unit 13, to examine the initial conditions of ignition system, i.e. and igniting ventilation and pathogenic wind-warm of igniting.It is highly preferred that main air duct 8 is additionally provided with main air duct air measuring unit 24, to test the ventilation at main-inlet place.
According to exemplary embodiment of the present utility model, one-level air channel igniting unit 2 includes one-level air-channel ignition burner 25 and main air duct 8 is arranged in parallel one-level air channel 27 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 is arranged on main air duct 8 and is connected with one-level air channel 27.
Light breeze road igniting unit 3 includes light breeze road start-up burner 33 and main air duct 8 and one-level air channel 27 is arranged in parallel light breeze road 34 and the light breeze road air door 31 being arranged on porch, light breeze road 34, light breeze road start-up burner 33 is arranged on main air duct 8 and is positioned at the downstream of one-level air-channel ignition burner 25, is connected with light breeze road 34 simultaneously.
During ignition of the boiler, close main air duct air door 22 and light breeze road air door 31 and retain a little cooling air, the adjustment total air door 11 of 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 pathogenic wind-warm 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 adjustment total air door 11 of inlet conduits, light breeze road air door 31 ensure the excess air coefficient of light breeze road start-up burner 33 air distribution, to meet design wind speed, ignition system outlet pathogenic wind-warm is made to meet boiler ignition start demand.
Preferably, one-level air channel igniting unit 2 also includes the one-level air-channel ignition burner air measuring unit 23 being arranged in one-level air channel 27 and the one-level air-channel ignition burner outlet pathogenic wind-warm measuring unit 26 being arranged in main air duct 8, so that whether the pathogenic wind-warm and air quantity examining one-level air-channel ignition burner entrance and exit meets requirement, for feeding back a hot blast situation after this grade of start-up burner heats, the convenient start-up burner that adjusts inputs heat, thus reaching the uniform effect of temperature rise in whole ignition air duct.Similarly, light breeze road igniting unit 3 preferably also includes the light breeze road start-up burner air measuring unit 32 being arranged in light breeze road 34 and the light breeze road start-up burner pathogenic wind-warm measuring unit 35 being arranged in main air duct 8, whether the pathogenic wind-warm of air quantity and outlet to examine light breeze road start-up burner entrance meets requirement, for feeding back a hot blast situation after this grade of start-up burner heats, the convenient start-up burner that adjusts inputs heat, thus reaching the uniform effect of temperature rise in whole ignition air duct.It is true that the entrance pathogenic wind-warm in one-level air channel and light breeze road all can be recorded by entrance pathogenic wind-warm measuring unit 12.
Further, being also preferably provided with outlet air measuring unit 41 and outlet pathogenic wind-warm measuring unit 42 in outlet conduits 4, for examining the outlet pathogenic wind-warm of ignition system, whether air quantity meets boiler ignition start demand.Wherein, afterbody light breeze road igniting unit 3 can be not provided with light breeze road start-up burner pathogenic wind-warm measuring unit 35, and directly adopts the outlet pathogenic wind-warm measuring unit 42 arranged in outlet conduits 4 so that whether the pathogenic wind-warm examining the start-up burner outlet of light breeze road meets requirement.
When needs arrange at least one light breeze road igniting unit 3, at least one start-up burner 33 interval, light breeze road of at least one light breeze road igniting unit 3 is arranged on main air duct 8 and is sequentially located at the downstream of one-level air-channel ignition burner 25.By dispersed placement multi-stage air channel start-up burner, it is possible to make full use of space, reduce the floor space of air-channel ignition burner, reduce structure and arrange difficulty.
Below in conjunction with concrete example, the structurally and operationally mode of CFB Boiler road multistep ignition system in this utility model is described.
Referring to attached Fig. 1 and 2, for 600MW recirculating fluidized bed (CFB) boiler, boiler adopts 2 set CFB Boiler road of the present utility model multistep ignition systems, and often set air channel multistep ignition system arranges two-stage air channel igniting unit, and 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) the total air door 11 of inlet conduits, entrance pathogenic wind-warm measuring unit 12 and inlet conduits total blast volume measuring unit 13 by being arranged on inlet conduits 1 examine ignition system initial conditions, ventilation of namely lighting a fire, pathogenic wind-warm of igniting；
2) close main air duct air door 22 and light breeze road air door 31 and retain a little cooling air, observing cooling air quantity by main air duct air measuring unit 24 and light breeze road start-up burner air measuring unit 32；Observe one-level air-channel ignition burner air measuring unit 23 measured value and coordinate the adjustment total air door 11 of inlet conduits and one-level air door of air duct 21, it is ensured that 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, export pathogenic wind-warm measuring unit 26 by one-level air-channel ignition burner and observe whether temperature value meets design load, if being unsatisfactory for adjusting one-level air-channel ignition burner 25 to exert oneself and make it meet, then prepare to start light breeze road start-up burner 33 if meeting；
3) by observing light breeze road start-up burner apparatus for measuring air quantity 32 measured value and coordinating the adjustment total air door 11 of inlet conduits and light breeze road air door 31, it is ensured that the excess air coefficient of light breeze road start-up burner 33 air distribution, to meet its design wind speed；When light breeze road start-up burner 33 puts into operation successfully and after stable operation, by observing the temperature value of one's intention as revealed in what one says temperature measurement unit 42, the airflow value of outlet air measuring unit 41 whether meet design load, if being unsatisfactory for, adjusting light breeze road start-up burner 33 and exerting oneself and make it meet.
4) when after two-stage air-channel ignition burner stable operation, the flue gas of about 900 DEG C will be formed at outlet conduits 4, water cooled wind chamber 6 under boiler bed are sent into by outlet conduits 4, spray again through grid plate hood, make boiler bed stream and heat bed and reach coal tossing temperature, it is then fed into fire coal, is formed and terminate ignition process after stablizing bed temperature.
The CFB Boiler road multistep ignition system of this example is in boiler properly functioning period, close one-level air door of air duct 21 and light breeze road air door 31 and retain a little cooling air, being carried out the adjustment of boiler First air by the adjustment total air door 11 of inlet conduits and main air duct air door 22.
To sum up, this utility model passes through hierarchical arrangement air-channel ignition burner, dispersion input ignition heat, makes air-channel ignition burner input heat more uniform, it is possible to the problem such as effectively prevent ignition air duct local overheating and refractory material scorification, come off.Further, dispersed placement air-channel ignition burner, it is possible to make full use of space, reduces air-channel ignition burner floor space, reduces structure and arranges difficulty.Adopting said structure, complete igniting by the input of ignition trigger condition, air-channel ignition burner, result exports, inputs a series of means such as adjustment, it is possible to allow circulating fluid-bed (CFB) ignition of the boiler stride forward to startup intelligent, one-touch.
This utility model is not limited to aforesaid detailed description of the invention.This utility model expands to any new feature disclosed in this manual or any new combination, and the step of the arbitrary new method disclosed or process or any new combination.
Claims (7)
1. a CFB Boiler road multistep ignition system, it is characterised in that described multistep ignition system includes inlet conduits, main air duct, outlet conduits and one-level air channel igniting unit and at least one light breeze road igniting unit, wherein,
Described inlet conduits connects 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 and outlet conduits and is provided with main air duct air door in porch, and described outlet conduits connects main air duct and water cooled wind chamber under boiler bed；
Described one-level air channel igniting unit includes one-level air-channel ignition burner and described main air duct is arranged in parallel one-level air channel 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 is arranged on main air duct and is connected with one-level air channel；
Described light breeze road igniting unit includes light breeze road start-up burner and described main air duct and one-level air channel is arranged in parallel light breeze road and the light breeze road air door being arranged on porch, described light breeze road, described light breeze road start-up burner is arranged on main air duct and is positioned at the downstream of described one-level air-channel ignition burner, is connected with described light breeze road simultaneously.
2. CFB Boiler road according to claim 1 multistep ignition system, it is characterised in that be additionally provided with entrance pathogenic wind-warm 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, it is characterised in that be additionally 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 includes the one-level air-channel ignition burner air measuring unit being arranged in one-level air channel and the one-level air-channel ignition burner outlet pathogenic wind-warm measuring unit being arranged in main air duct.
5. CFB Boiler road according to claim 1 multistep ignition system, it is characterized in that, described light breeze road igniting unit also includes the light breeze road start-up burner air measuring unit being arranged in light breeze road and the light breeze road start-up burner outlet pathogenic wind-warm measuring unit being arranged in main air duct.
6. CFB Boiler road according to claim 5 multistep ignition system, it is characterised in that be additionally provided with outlet air measuring unit and outlet pathogenic wind-warm 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 start-up burner interval, light breeze road of at least one light breeze road igniting unit described is arranged on main air duct and is sequentially located at the downstream of described one-level air-channel ignition burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620128472.XU CN205402694U (en) | 2016-02-19 | 2016-02-19 | Hierarchical ignition system in circulating fluidized bed boiler wind channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620128472.XU CN205402694U (en) | 2016-02-19 | 2016-02-19 | Hierarchical ignition system in circulating fluidized bed boiler wind channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205402694U true CN205402694U (en) | 2016-07-27 |
Family
ID=56447849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620128472.XU Withdrawn - After Issue CN205402694U (en) | 2016-02-19 | 2016-02-19 | Hierarchical ignition system in circulating fluidized bed boiler wind channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205402694U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570884A (en) * | 2016-02-19 | 2016-05-11 | 东方电气集团东方锅炉股份有限公司 | Multistage air duct ignition system of circulating fluidized bed boiler |
-
2016
- 2016-02-19 CN CN201620128472.XU patent/CN205402694U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570884A (en) * | 2016-02-19 | 2016-05-11 | 东方电气集团东方锅炉股份有限公司 | Multistage air duct ignition system of circulating fluidized bed boiler |
| CN105570884B (en) * | 2016-02-19 | 2017-10-27 | 东方电气集团东方锅炉股份有限公司 | A kind of CFB Boiler road multistep ignition system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20060196400A1 (en) | Process for combusting fuels, in particular waste | |
| CN103759258A (en) | Fuel-saving/gas-ignition stable-combustion low-nitrogen swirling pulverized coal combustor | |
| CN103175199B (en) | Low-load burner capable of achieving boiler flue heat recycling for boiler | |
| CN205402694U (en) | Hierarchical ignition system in circulating fluidized bed boiler wind channel | |
| CN105509035B (en) | A kind of method, apparatus and automatic control system of determining opposed firing intake | |
| CN110287561A (en) | One kind stopping standby burner low-temperature flue gas cooling system and its Parameters design | |
| CN204084343U (en) | A kind of device reducing CFBB NOx emission based on flue gas recirculation | |
| CN207527571U (en) | A kind of natural gas boiler low nitrogen burning system | |
| CN207065568U (en) | A kind of fuel gas with low heat value burner and hot-blast stove | |
| CN103123111A (en) | Power station boiler combustor based on pulverized coal classified pre-burning-pyrolysis | |
| CN105570884B (en) | A kind of CFB Boiler road multistep ignition system | |
| CN105333422B (en) | The pulverized coal staging combustion device fired again for heat source so that inert component water power is added to vent one's spleen | |
| CN110107888A (en) | A kind of uniform distribution biomass fuel combustion equipment and its combustion method | |
| CN109268827A (en) | A kind of fuel gas with low heat value burner and hot-blast stove | |
| CN206176368U (en) | Pure oxygen combustor | |
| CN107255274A (en) | A kind of low nitrogen burner for gas boiler | |
| CN207247193U (en) | A kind of eddy flow chaos burner | |
| CN208074941U (en) | Coal dust pretreatment unit and boiler | |
| CN208074937U (en) | The coal dust pretreatment unit and boiler of boiler | |
| CN202039079U (en) | Top combustion stove with gas fuel back-flushing, premixing and preheating functions | |
| CN205957152U (en) | Machine stew pot stove | |
| CN201740020U (en) | Ignition burning device | |
| CN206695167U (en) | A kind of boiler secondary bellows system | |
| CN208154459U (en) | A kind of hot-blast stove air-makeup system | |
| CN205191553U (en) | Circulating fluidized bed boiler bed material heating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160727 Effective date of abandoning: 20171027 |