CN205592941U - Circulating fluidized bed boiler - Google Patents
Circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN205592941U CN205592941U CN201620429368.4U CN201620429368U CN205592941U CN 205592941 U CN205592941 U CN 205592941U CN 201620429368 U CN201620429368 U CN 201620429368U CN 205592941 U CN205592941 U CN 205592941U
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- CN
- China
- Prior art keywords
- cfbb
- buffering
- returning charge
- air
- wind
- Prior art date
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- 230000003139 buffering effect Effects 0.000 claims abstract description 65
- 238000009826 distribution Methods 0.000 claims description 38
- 239000003082 abrasive agent Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 12
- 239000004744 fabric Substances 0.000 description 7
- 239000000872 buffer Substances 0.000 description 6
- 230000003134 recirculating effect Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 210000000038 chest Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model discloses a circulating fluidized bed boiler, this circulating fluidized bed boiler include furnace (1), the bottom of furnace (1) is equipped with air distribute device (2), circulating fluidized bed boiler still includes the edge many return pipe (3) of the circumference interval arrangement of furnace (1), return pipe (3) are connected move towards on the bottom lateral wall of furnace (1) the top returning charge of air distribute device (2), be equipped with buffering boss (4) on the interior pipe wall of the link of return pipe (3), make material in return pipe (3) flow through by the back returning charge of buffering boss (4) buffering extremely air distribute device (2). This circulating fluidized bed boiler can solve the problem that air distribute device is erodeed in the returning charge, prolongs air distribute device's life, improves circulating fluidized bed boiler's security and economic nature.
Description
Technical field
This utility model relates to boiler, in particular it relates to a kind of CFBB.
Background technology
Technology of Circulating Fluidized Bed Boiler is the high-efficiency low-pollution cleaning burning skill developed rapidly in recent decades
Art.Wherein material circulating system is the system that CFBB is exclusive, is a weight of boiler body
Want ingredient.Its effect is that a large amount of feed separation carried by flue gas are got off and are back to freeze profile
Combustion in CFB.
Under normal circumstances, the bottom of circulating fluidized bed boiler is provided with blast cap, this blast cap with in burner hearth by under
Upwards send into First air, on the sidewall of the bottom that returning charge mouth is arranged in burner hearth.Traditional recirculating fluidized bed pot
The bottom of the general the most relatively burner hearth of the returning charge mouth of stove, the returning charge thus resulting in quickly flowing is directly washed away
Blast cap.Develop due to the maximization along with CFBB again, need the same luck of multiple material-returning device
OK so that substantial amounts of recycle stock is back in burner hearth, cause washing away area and significantly increase, thus cause
Blast cap large area is directly washed away by returning charge, serious curtailment service life of blast cap, causes the biggest economy
Loss.And blast cap is through abrasion for a long time, under washing away pressure so that the material in burner hearth passes through
The air outlet reflux of blast cap is indoor to First air, forms leakage ash phenomenon, and long term accumulation will cause an air compartment
Dust stratification is serious, affects the properly functioning of CFBB so that CFBB has potential
Potential safety hazard.
Utility model content
The purpose of this utility model is to provide a kind of CFBB, and this CFBB can
Solve returning charge and wash away the problem of air-distribution device, extend the service life of air-distribution device, improve recirculating fluidized bed
The safety of boiler and economy.
To achieve these goals, this utility model provides a kind of CFBB, and this is ciculation fluidized
Bed boiler includes that burner hearth, the bottom of described burner hearth are provided with air-distribution device, and described CFBB also wraps
Including the circumferentially spaced many returning charge pipelines along described burner hearth, described returning charge pipeline is connected to described stove
On the bottom sidewall of thorax and towards the top returning charge of described air-distribution device, described returning charge pipeline connect end
Inner tubal wall is provided with buffering boss so that the stream in described returning charge pipeline buffers via described buffering boss
Rear returning charge is to described air-distribution device.
Preferably, the bottom surface of described buffering boss is connected to the bottom of described connection end of described returning charge pipeline
On inner tubal wall, the end face of described buffering boss be the wall with the inner tubal wall of described returning charge pipeline intersect slow
Rushing clinoplain, the horizontal sextant angle of this buffered pitch plane is less than the water of the central axis of described returning charge pipeline
Flat angle.
Preferably, the horizontal sextant angle of the described buffered pitch plane of described buffering boss is 10 °-15 °.
Preferably, described buffering boss is made up of high-abrasive material.
Preferably, this CFBB also includes many wind-distributing pipes, in each described buffering boss all
Being embedded with multiple described wind-distributing pipe, the air outlet of described wind-distributing pipe is inclined upwardly, upwards to blow via institute
State the decline stream of buffering boss.
Preferably, in described buffering boss, many described wind-distributing pipes were arranged symmetrically in along described burner hearth week
To two circumferential sides in.
Preferably, each described circumferential sides of described buffering boss is all arranged at intervals with described in 2-4 root
Wind-distributing pipe.
Preferably, the air outlet of described wind-distributing pipe is not higher than the buffered pitch plane of described buffering boss.
Preferably, the inclination angle of the air outlet of described wind-distributing pipe is 5 °-10 °.
Preferably, described CFBB also includes being positioned at the First air below described air-distribution device
Room, the air inlet of described wind-distributing pipe is connected to a described air compartment.
By technique scheme, this utility model is by the connection end at each returning charge pipeline and burner hearth
Buffering boss is set on inner tubal wall so that the stream in returning charge pipeline thereon is carried out by buffering boss
Buffering, and change the flow direction of stream, so that stream is along buffering the direction of boss extension from buffering
Boss is thrown off entering burner hearth, it is to avoid stream directly washes away air-distribution device, extends making of air-distribution device
With the life-span, and by air-distribution device, returning charge is blown towards the top of burner hearth, thus improve recirculating fluidized bed
The safety of boiler and economy.
Other features and advantages of the utility model will give in detailed description of the invention part subsequently in detail
Explanation.
Accompanying drawing explanation
Accompanying drawing is used to offer and is further appreciated by of the present utility model, and constitutes one of description
Point, it is used for explaining this utility model together with detailed description below, but is not intended that this practicality
Novel restriction.In the accompanying drawings:
Fig. 1 is the structural representation of the CFBB according to preferred implementation of the present utility model
Figure.
Description of reference numerals
1 burner hearth 2 air-distribution device
3 returning charge pipelines 4 buffer boss
5 wind-distributing pipes
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.It is to be understood that
It is that detailed description of the invention described herein is merely to illustrate and explains this utility model, is not used to limit
This utility model processed.
In this utility model, in the case of illustrating on the contrary, the noun of locality of use such as " upper and lower "
It is typically for for direction shown in the drawings or for on vertical, vertical or gravity direction
The relationship description word of each parts mutual alignment.Wherein, " horizontal sextant angle " being hereinafter previously mentioned for
Angle between horizontal plane.
See Fig. 1, Fig. 1 and show the recirculating fluidized bed pot according to preferred implementation of the present utility model
The structural representation of stove.Wherein, this CFBB includes that burner hearth 1, the bottom of burner hearth 1 are provided with
Air-distribution device 2, CFBB also includes the circumferentially spaced many refeed lines along burner hearth 1
Road 3, returns on the sidewall of the bottom that returning charge pipeline 3 is connected to burner hearth 1 and towards the top of air-distribution device 2
Material, the inner tubal wall connecting end of returning charge pipeline 3 is provided with buffering boss 4 so that in returning charge pipeline 3
Stream via buffering boss 4 buffering after returning charge to air-distribution device 2.
Combustible is separated from flue gas by CFBB by cyclone separator, and passes through
Isolated combustible is back in burner hearth 1 by the returning charge pipeline 3 of cyclone separator, returns to improve
Doses and efficiency, at circumferentially spaced many returning charge pipelines 3 of the burner hearth 1 of CFBB,
Repeatedly burn realizing the circulation of a large amount of fuel.This utility model is by every returning charge pipeline 3 and burner hearth
Buffering boss 4 is set on the inner tubal wall of 1 interconnective connection end so that buffering boss 4 is to through it
On returning charge pipeline 3 in stream buffer, and change speed and the flow direction of stream so that
Obtain the stream bearing of trend along buffering boss 4 to be thrown off entering burner hearth 1 from buffering boss 4, it is to avoid
Stream directly washes away air-distribution device 2, extends the service life of air-distribution device 2, and passes through air-distribution device
Returning charge is blown by 2 towards the top of burner hearth 1, thus improves safety and the economy of CFBB
Property.Air-distribution device 2 is to be arranged on the multiple blast caps bottom burner hearth 1 in FIG.
Especially, the bottom surface of buffering boss 4 is connected on the bottom inner tubal wall connecting end of returning charge pipeline 3,
The end face of buffering boss 4 is the buffered pitch plane that the wall with the inner tubal wall of returning charge pipeline 3 intersects, and makes
Obtain buffered pitch plane the most smooth with the junction of the bottom inner tubal wall connecting end of returning charge pipeline 3, from
And avoid returning charge to be accumulated on buffering boss 4 so that the returning charge process of CFBB is more unobstructed,
Improve the efficiency of CFBB.Wherein, especially, the horizontal sextant angle of buffered pitch plane is less than
The horizontal sextant angle of the central axis of returning charge pipeline 3 so that buffered pitch plane is entered through stream thereon
Row buffering, changes speed and the flow direction of stream so that stream will not directly wash away cloth wind dress after dishing out
Put 2, extend the service life of air-distribution device 2.For example, see Fig. 1, Fig. 1 buffers boss 4 energy
Enough reducing the speed of stream, the buffered pitch plane of simultaneous buffering boss 4 guides stream to meet level of approximation side
To dishing out, the material after dishing out is owing to self gravitation is to falling at air-distribution device 2, and is filled by cloth wind
The material dropped down onto on air-distribution device 2 is blowed to the top of burner hearth 1, significantly slow by the First air putting 2 blowouts
Returning charge directly washing away air-distribution device 2, thus solve the returning charge occurred in prior art and pass through cloth
The air outlet reflux of wind apparatus 2 leaks ash phenomenon to causing in an air compartment.Of the present utility model preferably
In embodiment, in infinite mode particularly preferably, the buffered pitch plane of buffering boss 4
Horizontal sextant angle is 10 °-15 °.
Owing to substantial amounts of returning charge needs to enter in burner hearth through buffering boss 4 so that cause buffering boss 4
Abrasion very serious, therefore this utility model is especially, and buffering boss 4 is made up of high-abrasive material so that
Extend the service life of buffering boss 4.Such as, in preferred implementation of the present utility model, with
Infinite mode, buffering boss 4 has the cast of Zirconium corundum wear-resistant pouring material to form, its service life
It it is 3 years.
Along with the capacity of current CFBB is increasing, corresponding returning charge amount is a lot, only passes through
Each returning charge pipeline 3 inner tubal wall of being connected end interconnective with burner hearth arranges buffering boss 4 be difficult to
Change the flow direction of a large amount of returning charge, therefore to adapt to a large amount of returning charge situations of CFBB,
Making to further enhance the effect preventing air-distribution device 2 from wearing and tearing, especially, this CFBB is also
Including many wind-distributing pipes 5, each buffering boss 4 is all embedded with many wind-distributing pipes 5, wind-distributing pipe 5
Air outlet is inclined upwardly, upwards to blow the decline stream via buffering boss 4.Wherein, many cloth wind
Pipe 5 is embedded in the inside of buffering boss 4, i.e. wind-distributing pipe 5 and runs through buffering boss 4, and wind-distributing pipe 5
Air outlet be inclined upwardly, to blow by the buffering stream that is thrown off of boss 4 so that be spilled over
Material just receive wind-distributing pipe 5 and go out wind action, make material obtain the speed in horizontal direction, stream
Farther by the distance of flat throwing, the power directly washing away air-distribution device 2 is the least, also makes returning charge exist simultaneously
Distribution in burner hearth 1 is more uniform, thus effectively further solves material and wash away the problem of air-distribution device,
Extend the service life of air-distribution device, improve safety and the economy of CFBB.And by
Blow out level wind action upwards in wind-distributing pipe 5, reduce and wash away pressure suffered by air-distribution device 2,
Thus it is indoor by the air outlet of air-distribution device 2 First air that backflows to avoid returning charge, form leakage ash phenomenon,
Ensure that the properly functioning of CFBB.
In preferred implementation of the present utility model, especially, in buffering boss 4, many cloth wind
Pipe 5 is arranged symmetrically in along two circumferential sides of burner hearth 1 circumference.Wind-distributing pipe 5 is buffering boss 4 times
Returning charge is blown by the side of side (i.e. the lower section of buffered pitch plane) so that returning charge is at wind-distributing pipe 5
Be inclined upwardly the wind action blown out so that returning charge obtains level speed upwards, has disperseed straight further
Connect the active force impacting downwards air-distribution device 2, significantly reduce the impulsive force suffered by air-distribution device 2,
And the wind of wind-distributing pipe 5 blowout also realizes the purpose of bulk cargo in burner hearth 1.
It is distributed uniformly in burner hearth 1 to realize returning charge, especially, two circumferences of buffering boss 4
Sidepiece is all arranged at intervals with 2-4 root wind-distributing pipe 5.Make to buffer boss 4 accordingly and all can have wind-distributing pipe
The wind of 5 blowouts so that returning charge is evenly dispersed in burner hearth 1, further enhances returning charge at burner hearth
Substantially stabilized burning in 1, and then improve efficiency and the economy of CFBB.But this reality
It is not limited thereto with novel, when the returning charge amount of CFBB is bigger, can be according to concrete
Produce and need, accordingly increase the radical of wind-distributing pipe 5；Otherwise, it is also possible to according to concrete production needs,
The corresponding radical reducing wind-distributing pipe 5.Wherein, many wind-distributing pipe roads 5 can be along the circumferential direction of burner hearth 1
Interval is embedded in two circumferential sides of buffering boss 4, it is possible to the short transverse along burner hearth 1 is spaced
It is embedded in two circumferential sides of buffering boss 4.
Especially, the air outlet of wind-distributing pipe 5 not higher than buffers the buffered pitch plane of boss 4.Make cloth
Airduct 5 can blow the returning charge dished out by buffering boss 4 in burner hearth 1 from bottom to top, with convex from buffering
The discharge end of platform 4 starts the returning charge that the most effective buffering is dished out by buffering boss 4.In this practicality
In novel preferred implementation, in infinite mode particularly preferably, the air outlet of wind-distributing pipe 5
Inclination angle be 5 °-10 °, this inclination angle is the angle between air outlet and the horizontal plane of wind-distributing pipe 5.
Especially, CFBB also includes the air compartment being positioned at below air-distribution device 2, cloth wind
The air inlet of pipe 5 is connected to an air compartment.In air-distribution device 2 and wind-distributing pipe 5, the wind of blowout is all from one
Secondary air compartment.CFBB of the present utility model is common to stove by air-distribution device 2 and wind-distributing pipe 5
Material in thorax 1 upwards blows so that the material distribution in burner hearth 1 is more uniform, carries further
The safety of high CFBB and economy.
Preferred implementation of the present utility model is described in detail above in association with accompanying drawing, but, this practicality is new
Type is not limited to the detail in above-mentioned embodiment, in technology concept of the present utility model,
The technical solution of the utility model can be carried out multiple simple variant, these simple variant belong to this reality
With novel protection domain.
It is further to note that each the concrete technology described in above-mentioned detailed description of the invention is special
Levy, in the case of reconcilable, can be combined by any suitable means, in order to avoid need not
The repetition wanted, various possible compound modes are illustrated by this utility model the most separately.
Additionally, combination in any can also be carried out between various different embodiment of the present utility model, only
Wanting it without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. a CFBB, this CFBB includes burner hearth (1), described burner hearth
(1) bottom is provided with air-distribution device (2), and described CFBB also includes along described burner hearth (1)
Circumferentially spaced many returning charge pipelines (3), described returning charge pipeline (3) is connected to described burner hearth
(1) on bottom sidewall and towards the top returning charge of described air-distribution device (2), it is characterised in that institute
The inner tubal wall connecting end stating returning charge pipeline (3) is provided with buffering boss (4) so that described refeed line
Stream in road (3) is via returning charge extremely described air-distribution device (2) after described buffering boss (4) buffering.
CFBB the most according to claim 1, it is characterised in that described buffering is convex
On the bottom inner tubal wall of the described connection end that the bottom surface of platform (4) is connected to described returning charge pipeline (3), institute
The end face stating buffering boss (4) is the buffering that the wall with the inner tubal wall of described returning charge pipeline (3) intersects
Clinoplain, the horizontal sextant angle of this buffered pitch plane is less than the central axis of described returning charge pipeline (3)
Horizontal sextant angle.
CFBB the most according to claim 2, it is characterised in that described buffering is convex
The horizontal sextant angle of the described buffered pitch plane of platform (4) is 10 °-15 °.
CFBB the most according to claim 1, it is characterised in that described buffering is convex
Platform (4) is made up of high-abrasive material.
CFBB the most as claimed in any of claims 1 to 4, its feature exists
In, this CFBB also includes many wind-distributing pipes (5), in each described buffering boss (4)
All being embedded with many described wind-distributing pipes (5), the air outlet of described wind-distributing pipe (5) is inclined upwardly, with to
On blow the decline stream via described buffering boss (4).
CFBB the most according to claim 5, it is characterised in that in described buffering
In boss (4), many described wind-distributing pipes (5) are arranged symmetrically in two along described burner hearth (1) circumference
In individual circumferential sides.
CFBB the most according to claim 6, it is characterised in that described buffering is convex
The each described circumferential sides of platform (4) is all arranged at intervals with wind-distributing pipe (5) described in 2-4 root.
CFBB the most according to claim 5, it is characterised in that described wind-distributing pipe
(5) air outlet is not higher than the buffered pitch plane of described buffering boss (4).
CFBB the most according to claim 5, it is characterised in that described wind-distributing pipe
(5) inclination angle of air outlet is 5 °-10 °.
CFBB the most according to claim 5, it is characterised in that described recycle stream
Fluidized bed boiler also includes the air compartment being positioned at described air-distribution device (2) lower section, described wind-distributing pipe (5)
Air inlet be connected to a described air compartment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620429368.4U CN205592941U (en) | 2016-05-12 | 2016-05-12 | Circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620429368.4U CN205592941U (en) | 2016-05-12 | 2016-05-12 | Circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205592941U true CN205592941U (en) | 2016-09-21 |
Family
ID=56930709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620429368.4U Active CN205592941U (en) | 2016-05-12 | 2016-05-12 | Circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205592941U (en) |
-
2016
- 2016-05-12 CN CN201620429368.4U patent/CN205592941U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |