CN206191572U - Fluidized bed boiler lighting up and low -load stable -combustion combustor - Google Patents
Fluidized bed boiler lighting up and low -load stable -combustion combustor Download PDFInfo
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- CN206191572U CN206191572U CN201621158858.1U CN201621158858U CN206191572U CN 206191572 U CN206191572 U CN 206191572U CN 201621158858 U CN201621158858 U CN 201621158858U CN 206191572 U CN206191572 U CN 206191572U
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- combustion chamber
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- oil combustion
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Abstract
The utility model discloses a circulation fluidized bed boiler lighting up and low -load stable -combustion combustor who belongs to fluidized bed boiler lighting up and the low -load technique of surely firing. This novel combustor has little oil or few oil drop fire and low -load and surely fires the function, and the main objective is that ignite and the low -load surely fires for fluidized bed boiler cold state. This combustor includes oily combustion chamber and oil gun ignition, secondary oil combustion chamber, angers and examine device, hydrocyclone fan passageway, whirl blade, combustor tapered section, combustor flaring section, cooling duct, samming mixing section. At first utilize high -pressure wind to make ignition atomizing fuel fully burn to a small amount of fuel in oily combustion chamber in the design, this oil gun adopts mechanical atomization or air atomization, then utilizes wind indoor to the thorough after -flame of fuel and promote flame from postcombustion room blowout at postcombustion, the whirl blade make a wind in the hydrocyclone fan passageway rotate and with follow postcombustion room spun flame intensive mixing to play the effect of cooling postcombustion room, last wind -warm syndrome misce bene in the samming section.
Description
Technical field
The utility model belongs to field of combustion technology, more particularly to a kind of fluidized-bed combustion boiler starting ignition and low-load combustion-stabilizing
Burner.
Background technology
Many station boilers use fluidized-bed combustion boiler, unit starting and a large amount of combustions of low-load combustion-stabilizing needs consumption at present for China
Oil, largely transforms generating plant pulverized coal boiler, but be directed to fluid bed pot in igniting field plasma ignition and tiny-oil ignition
Furnace igniting technology, is not solved effectively also.The fluidized-bed combustion boiler igniting startup fuel consumption for using low calorific value coal is very big, and one
The each cold start of platform 300MW boilers needs to expend 30-40 tons of diesel oil, and another aspect fluidized-bed combustion boiler starts using original igniting
Mode, then can not put into cleaner, and environmental protection can not be up to standard, or even cause Desulfurization tower slurry to be poisoned and influence normal operation.Mesh
Before there are many fluidized-bed combustion boilers for using low heat value coal can not to realize that micro oil is lighted a fire, cause fuel utilization ratio low, light a fire into
This is higher.
The content of the invention
The purpose of this utility model is to provide a kind of fluidized-bed combustion boiler igniting and low-load combustion-stabilizing burner, solves fluid bed
Boiler cold-state is lighted a fire and low-load combustion-stabilizing problem.
The utility model is realized using following technical scheme：A kind of CFBB igniting and low-load combustion-stabilizing
Burner, is integrally placed in First air pipeline, also including being placed in burner front portion in the burner of front and rear opening tubular structure
The secondary oil combustion chamber of the heart and the oil combustion chamber for being connected with secondary oil combustion chamber and being passed from burner toe lateral wall；Oil combustion
Indoor configuration grease gun igniting device is burnt, fire monitor equipment, side wall of the fire monitor equipment from burner are provided with secondary oil combustion chamber
Pass；Multiple swirl vanes are set between the periphery of outlet and burner inner circumferential in secondary oil combustion chamber so that secondary oil
Whirl deposite tank passage is formed between outer wall of combustion chamber and burner inner wall；Shape between burner monolithic case and First air inner-walls of duct
Into cooling wind passage.
During igniting, fuel oil is burnt in oil combustion chamber first（A small amount of fuel oil, it is bright compared to traditional burner fuel amount
It is aobvious to reduce）, then further with First air（A small amount of First air, i.e., reduced compared to conventional burners air quantity）In secondary oil firing
Indoor mixed combustion improves burn-off rate, and fire monitor equipment detection flame combustion state, Whirl deposite tank had not only cooled down secondary oil combustion chamber but also right
The abundant eddy flow mixing of high-temp combustion flame, is finally located at wind-warm syndrome at the position at secondary oil combustor exit rear in burner internal
It is well mixed.
Further, the burner includes that the converging transition, divergent segment and the samming that are sequentially connected with along air intake direction mix
Section；Described secondary oil combustion chamber is located at the center of converging transition, leads between the outer wall of secondary oil combustion chamber and the inwall of converging transition
Cross link of boards；The oil combustion chamber and fire monitor equipment are passed from converging transition side wall；The exit end face of secondary oil combustion chamber with
Converging transition exit end face is concordant, and swirl vane is located between secondary oil combustor exit end periphery and converging transition port of export inner circumferential.
Further, oil combustion chamber and secondary oil combustion chamber are designed with, and there is oxygen to feed per first-stage firing chamber, improved
Efficiency of combustion both burn-off rate, oil combustion chamber is connected with secondary oil combustion chamber in 40~55o insertions（I.e. the axis angle of the two is in 40
~55o）, secondary oil combustion chamber is coaxially horizontally disposed with converging transition.
Further, the 5-20 ° of contraction of converging transition axial direction angle, increases secondary oil combustion chamber oxygen quantity delivered, improves eddy flow
Blade inlet flow velocity.The 5-20 ° of contraction of angle of converging transition axial direction, refers to projection of the converging transition shell on vertical plane and converging transition axle
Line is in 5-20 ° of angle, and is shunk along air intake direction.
Further, swirl vane is designed between secondary oil combustor exit and converging transition, beneficial to high-temperature flue gas and cold sky
Gas is quick, be sufficiently mixed.
Further, swirl vane arrangement 6-14 pieces, axial angle is 15-30 °.Swirl vane axial direction angle is 15-30 °
Refer to swirl vane and burner axis（Or perhaps converging transition axis）In 15-30 ° of angle.
Further, in converging transition outlet connection divergent segment, divergent segment axial direction angle is 5-20 °, primarily to increasing
Cyclone space, the cold air mixing of reinforcing high-temperature flue gas.It refers to the shell of divergent segment in vertical plane that divergent segment axial direction angle is 5-20 °
On projection and divergent segment axis gradually expand in 5-20 ° of angle and along air intake direction.
Further, divergent segment connection samming mixing section, samming length of mixing is 3000mm-5000mm, is mainly
Extension length of mixing, protects primary air piping.
Igniter described in the utility model is placed in oil combustion chamber, and oil combustion chamber is connected with secondary oil combustion chamber, and two
Secondary oil combustion chamber is placed in converging transition and the two same axle center, is fixedly mounted by gusset therebetween, and exit end face is concordant, and two
Secondary oil combustion chamber forms Whirl deposite tank passage with converging transition, between secondary oil combustor exit end periphery and converging transition port of export inner circumferential
Swirl vane is set, blade arrangement 6-14 pieces, axial angle is 15-30 °, is welded to connect, converging transition 5-20 ° of the angle in axial direction with gradually
Expand 5-20 ° of the angle in section axial direction to be welded to connect, with samming mixing section by being welded to connect, burner is integrally placed at First air to divergent segment
In pipeline, circumference cooling wind passage is formed between First air pipeline, be welded to connect by gusset.
The course of work of the present utility model is as follows：During fluidized-bed combustion boiler igniting, increasing temperature and pressure and underload, oil gun
Atomized fuel is simultaneously lighted using igniter, in oil firing Indoor Combustion, flame is blown into secondary oil combustion chamber using high-pressure blast
Mix further burning with the cold wind entered from secondary oil entry of combustion chamber end, and fire monitor equipment pair is set on secondary combustion chamber
Combustion flame carries out real-time detection in secondary combustion chamber, its signal as flame failure protection signal source.Secondary oil combustion chamber is used
Reduction design, air cooling is cooled down using eddy flow, and secondary oil combustor exit end periphery sets swirl vane, and thermal-flame is from two
Secondary oil combustion chamber flow export, mixes with the Whirl deposite tank strong disturbance by blade, and into divergent segment, flaring design is beneficial to gaseous mixture
Stream increase blending space, after divergent segment tentatively mixes, into samming mixing section, samming mixing section design length is generally 3
- 5 meters of rice, in burner entirety coaxial placement and First air pipeline, and forms circumference cooling wind passage with First air pipeline, it is ensured that
Burner is cooled down, it is to avoid scaling loss burner.Sufficient mixing length is provided so that after wind-warm syndrome is uniform, from the outlet of samming mixing section
Into fluidized-bed combustion boiler bottom plenum.A final wind-warm syndrome is adjusted by adjusting amount of fuel, air quantity, initial stage radiator is finally played,
The effect of fluidized-bed combustion boiler stabilization burning is helped when baker effect and underload.
Technical characterstic of the present utility model is：1）Using igniter oil gun to a small amount of fuel-oil atmozation, in combustion chamber
Burning, is then sufficiently mixed with the First air for entering secondary oil combustion chamber, burns again, reaches the mesh that fuel oil fully thoroughly burns
's；2）Using the tapered design of converging transition, increase the air quantity for entering secondary oil combustion chamber, namely increase oxygen amount in secondary oil combustion chamber
Supply, improves burn-off rate；In addition it is tapering type design cause swirl vane entrance velocity improve, increase swirl strength, beneficial to from
The abundant eddy flow mixing of thermal-flame that secondary oil combustion chamber sprays；3）Divergent segment design sets mainly for swirl vane discharge swirl
Meter, is that thermal-flame is quick with cold wind, is sufficiently mixed raising blending space；4）It is thermal-flame that equal temperature section Mixed Design is mainly
Blending space and the time more long is provided with cold First air mixture, the hot blast temperature into burner hearth is evenly distributed, while protecting
Shield First air pipeline avoids scaling loss；5）By adjusting some row parameters such as Oil Gun, primary air velocity, it is possible to achieve fluid bed pot
Stove cold state spark starts and low-load combustion-stabilizing, makes that fluidized-bed combustion boiler ignition process is more safe and environment-friendly, economy.
Brief description of the drawings
Fig. 1 burner theory structure schematic diagrams.
In figure：01st, oil combustion chamber, 02, fire monitor equipment, 03, converging transition, 04, secondary oil combustion chamber, 05, Whirl deposite tank passage,
06th, swirl vane, 07, divergent segment, 08, samming mixing section, 09, gusset, 10, circumference cooling wind passage.
Fig. 2 burner nozzle short side views.
Fig. 3 swirl vane side views.
Fig. 4 burner top views.
Specific embodiment
The utility model provides the burner of a kind of igniting of fluidized-bed combustion boiler and low-load combustion-stabilizing, below in conjunction with the accompanying drawings and tool
Body implementation method is described in further detail to the utility model.
Fig. 1 is burner theory structure schematic diagram, and burner is mainly made up of 10 parts.Igniter and oil combustion chamber
01 is integrated design, and oil combustion chamber is connected with secondary oil combustion chamber 04 in 40~55o insertions, secondary oil combustion chamber 04 and converging transition
03 is coaxial horizontally disposed, and fire monitor equipment 02 is set with the insertion junction of secondary oil combustion chamber 04 in oil combustion chamber 01, detects flame
Case of fire, as the control signal of fuel oil, cold flow speed control and flame failure protection.In the port of export of secondary oil combustion chamber 04
Portion and the design swirl vane 06 of converging transition 03, blade arrangement 6-14 pieces, axial angle is 15-30 °, the axial angle 5- of converging transition 03
It is 20 °, coaxially arranged with First air pipe centerline, eddy flow cooling wind passage is formed with First air pipeline, on the one hand cool down secondary
Oil combustion chamber, on the other hand provides Whirl deposite tank, and utilizes tapered design, increases spinning disk entrance velocity, strengthens swirl strength, profit
Quickly it is sufficiently mixed with cooling wind in thermal-flame, but converging transition axial direction angle can not be too big, otherwise increases the resistance of First air air-flow
Power is excessive, is unfavorable for flowing.The arrival end of divergent segment 07 is connected with the port of export of converging transition 03, and it is coaxial with First air pipe centerline
Arrangement, axial angle is 5-20 °, and flaring is mainly designed to increase eddy flow blending space, beneficial to fuel oil combustion high temperature flame
Quickly timely mix with a cold wind.And then divergent segment 07 connects samming mixing section 08, and samming length of mixing needs
3000mm-5000mm, keeps sufficient length to ensure that wind-warm syndrome is well mixed, and the external diameter of samming mixing section 08 is protected with the exit of divergent segment 07
Hold consistent, all of above part constitutes burner entirety, combustor component material is cast using high temperature resistant material and made, by weldering
Connect in succession.Burner integral arrangement forms circumference cooling wind passage, passage ring-type seam in First air pipeline with First air pipeline
Gap retains 10mm-30mm, is welded to connect by gusset between burner entirety and First air pipeline.
The above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, improvement can also be made, it is also possible to above-mentioned specific embodiment party
Formula is combined, and technical schemes that these are improved and combination is formed also should be regarded as protection domain of the present utility model.
The burner that the utility model starts mainly for the igniting of power station fluidized-bed combustion boiler and low-load combustion-stabilizing problem is designed,
It is entirely different with other start-up burners in principle and structure.The burner sets oil combustion chamber, secondary oil on the burner
Combustion chamber, converging transition, divergent segment, samming mixing section, igniter, fire monitor equipment etc., form and fuel efficient are burnt, Ke Yiyou
Effect solves the problems, such as that fluidized-bed combustion boiler igniting starts and low-load combustion-stabilizing.And it is high, real with low cost, simple to operate, reliability
With property it is strong the features such as.
The utility model be applied to have been put into operation and just in the fluidized-bed combustion boiler of installation and debugging.With structure letter
The advantages of list, operation simple, easy to maintenance and economy, with extensive Social benefit and economic benefit.
Claims (8)
1. a kind of fluidized-bed combustion boiler is lighted a fire and low-load combustion-stabilizing burner, it is characterised in that in the combustion of front and rear opening tubular structure
Burner is integrally placed in First air pipeline, also including being placed in the secondary oil combustion chamber of burner front central（04）And with it is secondary
Oil combustion chamber（04）The oil combustion chamber for being connected and being passed from burner toe lateral wall（01）；Oil combustion chamber（01）Interior configuration oil gun
Igniter, in secondary oil combustion chamber（04）It is upper to be provided with fire monitor equipment（02）, fire monitor equipment（02）Worn from the side wall of burner
Go out；In secondary oil combustion chamber（04）Multiple swirl vanes are set between the periphery of outlet and burner inner circumferential（06）So that
Secondary oil combustion chamber（04）Whirl deposite tank passage is formed between outer wall and burner inner wall（05）；Burner monolithic case and First air
Circumference cooling wind passage is formed between inner-walls of duct（10）.
2. a kind of fluidized-bed combustion boiler according to claim 1 is lighted a fire and low-load combustion-stabilizing burner, it is characterised in that described
Burner includes the converging transition being sequentially connected with along air intake direction（03）, divergent segment（07）And samming mixing section（08）；Described
Secondary oil combustion chamber（04）Positioned at converging transition（03）Center, secondary oil combustion chamber（04）Outer wall and converging transition（03）Inwall
Between pass through gusset（09）Connection；The oil combustion chamber（01）And fire monitor equipment（02）From converging transition（03）Side wall is passed；Two
Secondary oil combustion chamber（04）Exit end face and converging transition（03）Exit end face is concordant, swirl vane（06）It is located at secondary oil combustion chamber
（04）Port of export periphery and converging transition（03）Between port of export inner circumferential.
3. a kind of fluidized-bed combustion boiler according to claim 2 is lighted a fire and low-load combustion-stabilizing burner, it is characterised in that design
There is oil combustion chamber（01）With secondary oil combustion chamber（04）, and there is oxygen to feed per first-stage firing chamber, improve efficiency of combustion and both fired
Most rate, oil combustion chamber（01）With secondary oil combustion chamber（04）Connected in 40~55o insertions, secondary oil combustion chamber（04）With converging transition
（03）It is coaxial horizontally disposed.
4. a kind of fluidized-bed combustion boiler according to claim 2 is lighted a fire and low-load combustion-stabilizing burner, it is characterised in that tapered
Section（03）The 5-20 ° of contraction of axial angle, increases secondary oil combustion chamber（04）Oxygen quantity delivered, improves swirl vane（06）Entrance stream
Speed.
5. a kind of fluidized-bed combustion boiler according to claim 2 is lighted a fire and low-load combustion-stabilizing burner, it is characterised in that secondary
Oil combustion chamber（04）Outlet and converging transition（03）Between design swirl vane（06）, beneficial to high-temperature flue gas and cold air it is quick, fill
Divide mixing.
6. a kind of fluidized-bed combustion boiler according to claim 2 or 5 is lighted a fire and low-load combustion-stabilizing burner, it is characterised in that rotation
Stream blade（06）Arrangement 6-14 pieces, axial angle is 15-30 °.
7. a kind of fluidized-bed combustion boiler according to claim 2 is lighted a fire and low-load combustion-stabilizing burner, it is characterised in that gradually
Contracting section（03）Outlet connection divergent segment（07）, divergent segment（07）Axial angle is 5-20 °, primarily to increase cyclone space,
The cold air mixing of reinforcing high-temperature flue gas.
8. a kind of fluidized-bed combustion boiler according to claim 2 is lighted a fire and low-load combustion-stabilizing burner, it is characterised in that flaring
Section（07）Connection samming mixing section（08）, samming mixing section（08）Length is 3000mm-5000mm, primarily to extension mixing
Segment length, protects First air pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621158858.1U CN206191572U (en) | 2016-10-25 | 2016-10-25 | Fluidized bed boiler lighting up and low -load stable -combustion combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621158858.1U CN206191572U (en) | 2016-10-25 | 2016-10-25 | Fluidized bed boiler lighting up and low -load stable -combustion combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206191572U true CN206191572U (en) | 2017-05-24 |
Family
ID=58731969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621158858.1U Withdrawn - After Issue CN206191572U (en) | 2016-10-25 | 2016-10-25 | Fluidized bed boiler lighting up and low -load stable -combustion combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206191572U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482094A (en) * | 2016-10-25 | 2017-03-08 | 山西大学 | A kind of fluidized-bed combustion boiler igniting and low-load combustion-stabilizing burner |
-
2016
- 2016-10-25 CN CN201621158858.1U patent/CN206191572U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482094A (en) * | 2016-10-25 | 2017-03-08 | 山西大学 | A kind of fluidized-bed combustion boiler igniting and low-load combustion-stabilizing burner |
| CN106482094B (en) * | 2016-10-25 | 2018-08-24 | 山西大学 | A kind of igniting of fluidized-bed combustion boiler and low-load combustion-stabilizing burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170524 Effective date of abandoning: 20180824 |
|
| AV01 | Patent right actively abandoned |