CN205746810U - Air-distribution device and CFBB - Google Patents
Air-distribution device and CFBB Download PDFInfo
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- CN205746810U CN205746810U CN201620736536.4U CN201620736536U CN205746810U CN 205746810 U CN205746810 U CN 205746810U CN 201620736536 U CN201620736536 U CN 201620736536U CN 205746810 U CN205746810 U CN 205746810U
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Abstract
This utility model relates to field of boilers, disclose a kind of air-distribution device and a kind of CFBB, described air-distribution device includes air compartment, described air compartment is provided with at least one partition wall, described air compartment to be divided into many sub-air compartments, each described sub-air compartment all includes being provided with on the air channel individually connected with this sub-air compartment, and each described air channel the air door for controlling this air channel aperture；Described CFBB includes burner hearth and the lower section being positioned at described burner hearth the air-distribution device connected with described burner hearth, and described air-distribution device is according to air-distribution device of the present utility model.Air-distribution device of the present utility model compartmentalization can control blast so that blast controls more accurate, and the CFBB including described air-distribution device is more beneficial for controlling cloth wind uniformity and fluidization uniformity, also helps and realizes siege thermal evenness controlling simultaneously.
Description
Technical field
This utility model relates to field of boilers, in particular it relates to a kind of air-distribution device and the circulation with this air-distribution device
Fluidized-bed combustion boiler.
Background technology
This utility model relates to large-size circulating fluidized bed (large circulating fluidized bed boiler) boiler technology field, is specifically related to
A kind of capacitance grade is the supercritical large circulating fluidized bed boiler air-distribution device of 200MW ratings above.
The maximization of CFBB is the developing direction of current CFBB, at present, domestic large-scale follows
When circulation fluidized bed boiler uses single air distribution plate to arrange, First air enters air compartment from both sides, is more than 200MW's for capacitance grade
Large circulating fluidized bed boiler, the size of air distribution plate increases, such as when when increasing to 300Mw capacitance grade of boiler capacity, cloth
The size of aerofoil reaches about 30 meters, damages owing to First air exists on-way resistance during the intermediate flow of air compartment two lateral wind room
Lose and air compartment uses non-isobaric air compartment design so that primary air pressure skewness in air compartment, the capacity of boiler is the biggest then
This uneven the most obvious；It addition, for large circulating fluidized bed boiler more than 200MW grade, generally use 3 separation
Device, adds the recycle stock of each separator uneven, also results in middle bed temperature higher than both sides bed temperature about 60～120 DEG C, stream
Change bed tempertaure uneven.This utility model aims to solve the problem that the cloth wind of the air-distribution device of existing CFBB is uneven and asks
Topic, realizes local bed temperature regulatory function simultaneously, contributes to the homogenization of fluidized-bed temperature.
Utility model content
The purpose of this utility model is to provide one compartmentalization can control blast so that blast controls more accurate cloth
Wind apparatus, and also provide a kind of CFBB including described air-distribution device, this CFBB more has
It is beneficial to control cloth wind uniformity and fluidization uniformity, also helps simultaneously and realize siege thermal evenness controlling.
To achieve these goals, this utility model provides a kind of air-distribution device, and described air-distribution device includes air compartment, described
Air compartment is provided with at least one partition wall, described air compartment to be divided into many sub-air compartments, each described sub-air compartment all include with
The air door for controlling this air channel aperture it is provided with on the air channel that this sub-air compartment individually connects, and each described air channel.
Preferably, described air compartment includes along sub-air compartment described at least three being longitudinally arranged in order, with the institute being positioned at middle part
State described air channel corresponding to sub-air compartment from described air compartment, sequentially pass through other the described sub-air compartment company being positioned at outside this sub-air compartment
It is connected to the sidewall of this sub-air compartment.
Preferably, corresponding with the described sub-air compartment being positioned at end described air channel is connected to the sidewall of this sub-air compartment.
Preferably, described air compartment includes that multiple described air channels connect respectively along the multiple described sub-air compartment being longitudinally arranged in order
It is connected to the bottom of the described sub-air compartment of correspondence.
Preferably, described air-distribution device also includes that main air duct, multiple described air channels are all connected to described main air duct.
Preferably, described partition wall is carbon steel partition wall, heat resisting steel partition wall, refractory material partition wall or water-cooling wall.
Preferably, described air-distribution device also includes air distribution plate, and this air distribution plate is arranged at the top of described air compartment.
This utility model also provides for a kind of CFBB, and this CFBB includes burner hearth and is positioned at described
The lower section of burner hearth the air-distribution device connected with described burner hearth, described air-distribution device is according to air-distribution device of the present utility model.
Preferably, described CFBB is the large circulating fluidized bed boiler of more than 200MW.
By technique scheme, in air-distribution device of the present utility model, by air compartment being separated into many sub-air compartments,
And all coordinate single air channel to carry out conveying First air in corresponding sub-air compartment to every sub-air compartment, be equivalent to be separated into air compartment
The most individually controllable multiple subspaces, particularly with for the air-distribution device that air compartment length is longer, it is to avoid prior art
In only when the conveying First air of air compartment both sides, First air is delivered in the middle part of air compartment that friction loss is relatively big, First air in air compartment
The problem that pressure distribution is uneven.And in this utility model CFBB, owing to applying above-mentioned air-distribution device, each
Air door on air channel can control the aperture in air channel, thus controls to be blown into the air quantity in each sub-air compartment, is more beneficial for controlling cloth
Wind uniformity and fluidization uniformity, and siege thermal evenness controlling can also be realized simultaneously.
Other features and advantages of the utility model will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to offer and is further appreciated by of the present utility model, and constitutes a part for description, with following
Detailed description of the invention be used for explaining this utility model together, but be not intended that restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the schematic diagram that the first embodiment according to air-distribution device of the present utility model is applied to boiler；
Fig. 2 is the schematic diagram that the second embodiment according to air-distribution device of the present utility model is applied to boiler；
Fig. 3 is the schematic diagram that the 3rd embodiment according to air-distribution device of the present utility model is applied to boiler.
Description of reference numerals
1 burner hearth 2 air door
3 air compartment 4 air channels
The 5 sub-air compartments of partition wall 6
7 main air duct 8 air distribution plates
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 should be appreciated that herein
Described detailed description of the invention is merely to illustrate and explains this utility model, is not limited to this utility model.
In this utility model, in the case of illustrating on the contrary, the noun of locality of use such as " upper and lower " is typically at this
The air-distribution device of utility model and the normal service condition of CFBB are undefined, and also square with reference to shown in accompanying drawing
To unanimously；" left and right " is consistent with direction with reference to shown in accompanying drawing.
This utility model provides a kind of air-distribution device, and described air-distribution device includes air compartment 3, is provided with in described air compartment 3
At least one partition wall 5, so that described air compartment 3 to be divided into many sub-air compartments 6, each described sub-air compartment 6 all includes and this sub-air compartment 6
The individually air channel 4 of connection, and on each described air channel 4, it is provided with the air door 2 for controlling this air channel 4 aperture.
In air-distribution device of the present utility model, by air compartment 3 being separated into many sub-air compartments 6, and give every sub-air compartment 6
All coordinate single air channel 4 to carry First air in corresponding sub-air compartment 6, be equivalent to be separated into air compartment 6 multiple each
Individually controllable subspace, particularly with for the air-distribution device that air compartment 3 length is longer, it is to avoid only from air compartment in prior art
During 3 both sides conveying First air, First air is delivered in the middle part of air compartment 3 that friction loss is relatively big, primary air pressure distribution in air compartment 3
Uneven problem.
In air-distribution device of the present utility model, air compartment 3 subregionization controls, and the air door 2 on each air channel 4 can control wind
The aperture in road 4, thus control to be blown into the air quantity in each sub-air compartment 6, the control of First air blowing volume in the most each sub-air compartment 6
More convenient precisely, the most whole air compartment 3 blast control more accurate.
Wherein, it will be appreciated by persons skilled in the art that division or deployment scenarios, the Ke Yigen of each sub-air compartment 6
Specific design is carried out according to practical situation, the such as size and dimension etc. of air compartment 3.
For example, with reference to Fig. 1 and Fig. 2, in the first preferred implementation of the present utility model, described air compartment 3 includes edge
Sub-air compartment 6 described at least three being longitudinally arranged in order, the described air channel 4 corresponding with the described sub-air compartment 6 being positioned at middle part is from institute
State to sequentially pass through outside air compartment 3 and be positioned at other the described sub-air compartment 6 outside this sub-air compartment 6 and be connected to the sidewall of this sub-air compartment 6.Example
As, in Fig. 1, having three sub-air compartments 6, middle sub-air compartment 6 includes passing from air compartment 3 respectively the sub-air compartment 3 in two, the left and right sides
And be connected to two air channels 4 of this centre sub-air compartment 6 sidewall, and on each air channel 4, it is provided with an air door 2；The most such as,
In Fig. 2, having four sub-air compartments 6, two sub-air compartments 6 at middle part include from air compartment 3 adjacent closer to outward through it respectively
The sub-air compartment 6 of side is connected to the sidewall of the sub-air compartment 6 of two in the middle part of this, and is provided with an air door 2 on each air channel 4.
Additionally or alternatively, corresponding with the described sub-air compartment 6 being positioned at end described air channel 4 is connected to this sub-air compartment 6
Sidewall (i.e. the sidewall of air compartment 3).
Again for example, with reference to Fig. 3, in the second preferred implementation of the present utility model, described air compartment 3 includes along longitudinally
The multiple described sub-air compartment 6 being arranged in order, multiple described air channels 4 are connected to the bottom of the described sub-air compartment 6 of correspondence.Example
As, in Fig. 3, having four sub-air compartments 6, four air channels 4 are connected to the bottom of corresponding sub-air compartment 6, on each air channel 4 all
It is provided with an air door 4.
In this case, selectively, described air-distribution device also includes that main air duct 7, multiple described air channels 4 are all connected to institute
State main air duct 7.
Wherein, described partition wall 5 can be carbon steel partition wall, heat resisting steel partition wall, refractory material partition wall or water-cooling wall.Generally feelings
For condition, the concrete facilities of partition wall 5 can determine according to the applied environment of air-distribution device, such as, fills at described cloth wind
Put in the case of being applied to large circulating fluidized bed boiler, when the sparking mode of large circulating fluidized bed boiler is stove Bed Ignites
Time, partition wall 5 can be carbon steel partition wall or water-cooling wall；When the sparking mode of large circulating fluidized bed boiler is siege down-firing,
Partition wall 5 can be heat resisting steel partition wall, refractory material partition wall or water-cooling wall.
It addition, see accompanying drawing, described air-distribution device can also include air distribution plate 8, and this air distribution plate 8 is arranged at described air compartment 3
Top.
According to the another aspect of utility model, additionally provide a kind of CFBB, this CFBB bag
The lower section including burner hearth 1 and be positioned at described burner hearth 1 air-distribution device connected with described burner hearth 1, according to described air-distribution device originally
The air-distribution device of utility model.
In air-distribution device of the present utility model, air compartment 3 subregionization controls, the control of First air blowing volume in each sub-air compartment 6
Make more convenient precisely, the most whole air compartment 3 blast controls more accurate, is especially applied to greatly by air-distribution device of the present utility model
After type fluidized bed circulation boiler, remarkably productive to the Uniform Control of blast.Further, air-distribution device of the present utility model is applied
After CFBB, when the siege region temperature drift corresponding with a certain sub-air compartment 6, it is also possible to will be in this sub-air compartment
The aperture of the air door 2 of 6 correspondences increases, thus increases and blow the First air air quantity to this sub-air compartment 6, thus reduces this sub-air compartment
The siege regional temperature that 6 temperature are corresponding, otherwise, when with the siege regional temperature of a certain sub-air compartment 6 correspondence on the low side time, then by subtracting
The little First air air quantity blowed to this sub-air compartment 6 implements cooling, and to sum up, CFBB of the present utility model is favourable
In controlling cloth wind uniformity, fluidization uniformity and siege temperature homogeneity.
Preferably, described CFBB is the large circulating fluidized bed boiler of more than 200MW.
Preferred implementation of the present utility model is described in detail above in association with accompanying drawing, but, this utility model does not limit
Detail in above-mentioned embodiment, in technology concept of the present utility model, can be to skill of the present utility model
Art scheme carries out multiple simple variant, and these simple variant belong to protection domain of the present utility model.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, this utility model is to respectively
Plant possible compound mode to illustrate the most separately.
Additionally, combination in any can also be carried out, as long as it is not disobeyed between various different embodiment of the present utility model
Carrying on the back thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (9)
1. an air-distribution device, described air-distribution device includes air compartment (3), it is characterised in that described air compartment is provided with at least in (3)
One partition wall (5), so that described air compartment (3) to be divided into many sub-air compartments (6), each described sub-air compartment (6) all includes and this son
The air channel (4) of air compartment (6) individually connection, and be provided with on each described air channel (4) for controlling this air channel (4) aperture
Air door (2).
Air-distribution device the most according to claim 1, it is characterised in that described air compartment (3) includes what edge was longitudinally arranged in order
Sub-air compartment (6) described at least three, the described air channel (4) corresponding with the described sub-air compartment (6) being positioned at middle part is from described air compartment (3)
Sequentially pass through outward and be positioned at other described sub-air compartment (6) in this sub-air compartment (6) outside and be connected to the sidewall of this sub-air compartment (6).
Air-distribution device the most according to claim 2, it is characterised in that corresponding with the described sub-air compartment (6) being positioned at end
Described air channel (4) is connected to the sidewall of this sub-air compartment (6).
Air-distribution device the most according to claim 1, it is characterised in that described air compartment (3) includes what edge was longitudinally arranged in order
Multiple described sub-air compartments (6), multiple described air channels (4) are connected to the bottom of the described sub-air compartment (6) of correspondence.
Air-distribution device the most according to claim 4, it is characterised in that described air-distribution device also includes main air duct (7), multiple
Described air channel (4) is all connected to described main air duct (7).
6. according to the air-distribution device described in any one in claim 1-5, it is characterised in that described partition wall (5) be carbon steel every
Wall, heat resisting steel partition wall, refractory material partition wall or water-cooling wall.
7. according to the air-distribution device described in any one in claim 1-5, it is characterised in that described air-distribution device also includes cloth
Aerofoil (8), this air distribution plate (8) is arranged at the top of described air compartment (3).
8. a CFBB, this CFBB includes burner hearth (1) and is positioned at the lower section of described burner hearth (1) also
The air-distribution device connected with described burner hearth (1), it is characterised in that described air-distribution device is according to any one in claim 1-7
Air-distribution device described in Xiang.
CFBB the most according to claim 8, it is characterised in that described CFBB is 200MW
Above large circulating fluidized bed boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620736536.4U CN205746810U (en) | 2016-07-13 | 2016-07-13 | Air-distribution device and CFBB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620736536.4U CN205746810U (en) | 2016-07-13 | 2016-07-13 | Air-distribution device and CFBB |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205746810U true CN205746810U (en) | 2016-11-30 |
Family
ID=57378605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620736536.4U Active CN205746810U (en) | 2016-07-13 | 2016-07-13 | Air-distribution device and CFBB |
Country Status (1)
| Country | Link |
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| CN (1) | CN205746810U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051754A (en) * | 2016-07-13 | 2016-10-26 | 神华集团有限责任公司 | Air distribution device and circulating fluidized bed boiler |
| CN115289461A (en) * | 2022-08-04 | 2022-11-04 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Resistance uniformity processing structure and method for air distribution plate of circulating fluidized bed boiler |
-
2016
- 2016-07-13 CN CN201620736536.4U patent/CN205746810U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051754A (en) * | 2016-07-13 | 2016-10-26 | 神华集团有限责任公司 | Air distribution device and circulating fluidized bed boiler |
| CN115289461A (en) * | 2022-08-04 | 2022-11-04 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Resistance uniformity processing structure and method for air distribution plate of circulating fluidized bed boiler |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |