CN209295181U - Flow field flow equalizing device for secondary air duct of boiler - Google Patents
Flow field flow equalizing device for secondary air duct of boiler Download PDFInfo
- Publication number
- CN209295181U CN209295181U CN201821228292.4U CN201821228292U CN209295181U CN 209295181 U CN209295181 U CN 209295181U CN 201821228292 U CN201821228292 U CN 201821228292U CN 209295181 U CN209295181 U CN 209295181U
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- secondary air
- air duct
- burner hearth
- hot
- wall
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 16
- 230000008676 import Effects 0.000 claims abstract description 10
- 238000005452 bending Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 244000061176 Nicotiana tabacum Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Abstract
The utility model relates to a flow field flow straightener in boiler secondary air duct, including the hot secondary air duct of furnace that has import, export, the furnace back wall secondary air duct that has furnace back wall secondary air duct export that is linked together with the hot secondary air duct of furnace. The hearth hot secondary air duct is provided with at least one steering part, and at least one first guide plate is arranged in the steering part. The direction of one end of the first guide plate is consistent with the extending direction of the hearth hot secondary air channel at the upstream of the turning part, and the direction of the other end of the first guide plate is consistent with the extending direction of the hearth hot secondary air channel at the downstream of the turning part. The utility model discloses a boiler secondary wind channel flow straightener is provided with the guide plate in the portion of turning to in the hot secondary wind channel of furnace, and smooth-going air current through the portion of turning to eliminates the adverse effect of the portion of turning to the air current field, promotes the homogeneity and the stability of the hot secondary wind channel of furnace, furnace back wall secondary wind channel, the hot secondary wind channel of furnace export air current.
Description
Technical field
The utility model relates to a kind of boiler secondary air duct flow field current equalizers.
Background technique
Modern Large-sized Coal-fired Power group design space arrangement is more compact, and boiler Main Tobacco Planting air duct fluid developed regime can not far expire
Foot requires, in addition fluid developed regime needed for the online secondary air flow measuring device of boiler is far also unable to satisfy requirement, so that boiler
The secondary road flow field of heat is poor, each bellows inlet Flow Field Distribution is uneven, and then leads between each burner that there are apparent wind
Measure deviation.
In the prior art, the disorder of boiler hot secondary air duct flow field, Flow Field Distribution uniformity are poor, cause each bellows entrance two
Secondary air quantity difference clearly, seriously affects boiler entirety air distribution；Entire secondary air duct flow field is poor, can not measure for Secondary Air
It measures device and one good flow field external environment is provided, cannot achieve the precise measurement of boiler secondary air quantity, so that boiler is stablized
Under the conditions of dial plate secondary air flow fluctuation it is very big, can not for boiler day-to-day operation air quantity adjustment guidance foundation be provided, cause boiler
Combustion conditions deteriorate, and seriously affect the safety and economic benefit of unit operation.
Summary of the invention
The shortcomings that the purpose of this utility model is to overcome the prior arts provides a kind of boiler air duct flow field and flows dress
It sets, is able to ascend the uniformity and stability of wall secondary air duct interior air-flow after the hot secondary air duct of burner hearth, burner hearth.
In order to achieve the above objectives, the technical solution adopted in the utility model is: flowing dress in a kind of boiler secondary air duct flow field
It sets comprising the hot secondary air duct of burner hearth and the burner hearth with the hot secondary air duct import of burner hearth, the hot secondary air duct outlet of burner hearth
Wall secondary air duct after the burner hearth exported with wall secondary air duct after burner hearth that hot secondary air duct is connected, the hot Secondary Air of burner hearth
Road has at least one steering portion, at least one first deflector is equipped in the steering portion of the hot secondary air duct of burner hearth, described
The direction of first deflector one end is consistent with the extending direction of the hot secondary air duct of burner hearth of the steering portion upstream, and described first leads
The direction of the flowing plate other end is consistent with the extending direction of the hot secondary air duct of burner hearth in the steering portion downstream.Smoothly by steering portion
Air-flow, eliminate steering portion to the adverse effect of airflow field, promote wall secondary air duct interior air-flow after the hot secondary air duct of burner hearth, burner hearth
Uniformity and stability.
Preferably, the steering portion of the hot secondary air duct of the burner hearth is in 90 ° of arc-shaped transitions.The hot secondary air duct of burner hearth can be eliminated
Airflow reflux area, the air-flow streamline after smoothly flowing through steering portion.
Preferably, first deflector is arc-shaped, the bending direction phase of first deflector and the steering portion
Together.
Preferably, there are two the hot secondary air duct imports of the burner hearth, two burner hearths for the hot secondary air duct tool of the burner hearth
Hot secondary air duct exports, and wall secondary air duct is secondary including wall after wall secondary air duct, the second burner hearth after the first burner hearth after the burner hearth
Air duct, after first burner hearth after wall secondary air duct, the second burner hearth wall secondary air duct respectively with the hot secondary air duct of the burner hearth into
The hot secondary air duct of burner hearth between the hot secondary air duct outlet of mouth, burner hearth is connected.
Further, wall secondary air duct and the hot Secondary Air of burner hearth after wall secondary air duct, the second burner hearth after first burner hearth
The connectivity part in road is equipped with air distributor.Wall secondary air duct after entering burner hearth is distributed by the guiding role of air distributor
Secondary air flow, purposefully balance burner hearth after wall secondary air duct and the hot secondary air duct of the burner hearth in secondary air duct downstream air inlet
Amount reduces the intake deviation of wall secondary air duct and the hot secondary air duct of the burner hearth in secondary air duct downstream after burner hearth.
Preferably, wall secondary air duct and the hot secondary air duct connectivity part of the burner hearth are set to the burner hearth heat two after the burner hearth
Secondary ducting outlet upstream.
Further, positioned at wall secondary air duct after the burner hearth and the hot secondary air duct of burner hearth in the hot secondary air duct of the burner hearth
The upstream of connectivity part is equipped with air measuring element.For measuring the total blast volume in the hot secondary air duct of burner hearth, i.e. boiler is secondary online
Total blast volume.
Further, the upstream of the air measuring element is equipped with air-flow even distributor.Rectified action is played to air-flow, is
Air measuring element provides a stable airflow field, and guarantees air measuring element face air-flow incoming flow, makes air measuring
Element testing is more accurate.
Further, the face that flows to of the air-flow even distributor and the hot secondary air duct interior air-flow of burner hearth is arranged.
Further, the upstream of the air-flow even distributor is equipped at least one second deflector.
Since above-mentioned technical proposal is used, the utility model has the advantage that compared with prior art
A kind of boiler secondary air duct flow field current equalizer of the utility model is arranged in the steering portion of the hot secondary air duct of burner hearth
Deflector eliminates steering portion to the adverse effect of airflow field smoothly by the air-flow of steering portion, promoted the hot secondary air duct of burner hearth,
The uniformity and stability of wall secondary air duct interior air-flow after burner hearth.Wherein, the deflector after burner hearth before wall secondary air duct can
Wall secondary air duct and the hot secondary air duct connectivity part air velocity field uniformity of burner hearth after improvement burner hearth, wall after reducing burner hearth from upstream
Flow deviation between secondary air duct and the hot secondary air duct of burner hearth；Wall secondary air duct and the hot secondary air duct connectivity part of burner hearth after burner hearth
The resistance that can reduce the hot secondary air duct outlet of burner hearth of deflector later, to reduce wall secondary air duct and burner hearth after burner hearth
The deviation of hot secondary air duct outlet air quantity.Meanwhile after being distributed using air distributor into burner hearth wall secondary air duct air quantity,
Air-flow is rectified using air-flow even distributor, providing a stable airflow field for air measuring element keeps its measurement accurate,
Guarantee unit safety, economical operation.
Detailed description of the invention
The structural schematic diagram of the first embodiment of the boiler air duct flow field current equalizer of 1 the utility model of attached drawing；
The structural schematic diagram of second of embodiment of the boiler air duct flow field current equalizer of 2 the utility model of attached drawing.
Wherein: 1, the hot secondary air duct of burner hearth；11, the hot secondary air duct import of burner hearth；12, the hot secondary air duct outlet of burner hearth；13,
Steering portion；2, wall secondary air duct after burner hearth；21, wall secondary air duct after the first burner hearth；22, wall secondary air duct after the second burner hearth；23,
Wall secondary air duct exports after burner hearth；3, the first deflector；4, air distributor；5, air measuring element；6, air-flow even distributor；7,
Second deflector.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and embodiments:
A kind of boiler air duct flow field current equalizer of the utility model comprising have the hot secondary air duct import 11 of burner hearth,
The hot secondary air duct 1 of burner hearth of the hot secondary air duct outlet 12 of burner hearth, the wall two after there is burner hearth being connected with the hot secondary air duct 1 of burner hearth
Wall secondary air duct 2 after the burner hearth of secondary ducting outlet 23.The hot secondary air duct 1 of burner hearth has at least one steering portion 13, steering portion 13
Interior the first deflector 3 for carrying out water conservancy diversion to the air-flow in the hot secondary air duct of burner hearth 1 equipped at least one.First deflector, 3 one end
Direction it is consistent with the extending direction of the hot secondary air duct 1 of the burner hearth of 13 upstream of steering portion；The direction of first deflector, 3 other end with
The extending direction of the hot secondary air duct 1 of the burner hearth in 13 downstream of steering portion is consistent.The arc-shaped mistake in steering portion 13 of the hot secondary air duct 1 of burner hearth
It crosses, the airflow reflux area after capable of eliminating steering portion 13 smoothly flows through the air-flow streamline of steering portion 13.Preferably, steering portion 13
Radian be 90 °.First deflector 3 is arc-shaped, and the first deflector 3 is identical as the bending direction of steering portion 13.
Embodiment 1:
The first embodiment of the utility model as shown in Figure 1, there are two burner hearth heat two for the hot tool of secondary air duct 1 of burner hearth
The hot secondary air duct outlet 12 of 11, two burner hearths of secondary air duct import；Wall secondary air duct 2 includes wall Secondary Air after the first burner hearth after burner hearth
Wall secondary air duct 22 after road 21, the second burner hearth.Wall secondary air duct 22 is distinguished after wall secondary air duct 21, the second burner hearth after first burner hearth
The hot secondary air duct 1 of burner hearth between the hot secondary air duct import 11 of burner hearth, the hot secondary air duct outlet 12 of burner hearth is connected.First furnace
The connectivity part of wall secondary air duct 22 and the hot secondary air duct 1 of burner hearth is equipped with air flow method after wall secondary air duct 21, the second burner hearth after thorax
Device 4.Wall two after wall secondary air duct 21 and the first burner hearth after being distributed by the guiding role of air distributor 4 into the first burner hearth
Secondary air flow in the hot secondary air duct 1 of burner hearth in secondary 21 downstream of air duct, purposefully makes wall secondary air duct 21 after the first burner hearth
It is balanced with the intake of the hot secondary air duct 1 of burner hearth in 21 downstream of wall secondary air duct after the first burner hearth, reduces air quantity difference.This reason is same
The intake of wall secondary air duct 22 and the hot secondary air duct 1 of burner hearth balances after sample is suitable for the second burner hearth.
Embodiment 2:
Second of embodiment of the utility model as shown in Figure 2, wall secondary air duct 2 and the hot Secondary Air of burner hearth after burner hearth
1 connectivity part of road is set to the upstream of the hot secondary air duct outlet 12 of burner hearth.It is located at wall secondary air duct after burner hearth in the hot secondary air duct 1 of burner hearth
2 are equipped with air measuring element 5 with the upstream of hot 1 connectivity part of secondary air duct of burner hearth, and it is equal that the upstream of air measuring element 5 is equipped with air-flow
Cloth device 6.Air-flow even distributor 6 plays rectified action to air-flow, provides a stable airflow field for air measuring element 5, and
Guarantee 5 face air-flow incoming flow of air measuring element, air measuring element 5 is enable accurately to measure.Preferably, air-flow even distributor 6
It is arranged with the face that flows to of hot 1 interior air-flow of secondary air duct of burner hearth；Or air measuring element 5 and air-flow even distributor 6 it is parallel, and two
Person is arranged perpendicular to the inner wall of the hot secondary air duct 1 of burner hearth.
In the present embodiment, the upstream of air-flow even distributor 6 is equipped at least one second deflector 7, leads air-flow by second
It being capable of face air-flow even distributor 6 after the water conservancy diversion of flowing plate 7.Preferably, the one end and gas of the second deflector 7 close to air-flow even distributor 6
Stream uniform device 6 fits and is vertically arranged.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.
All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it
It is interior.
Claims (10)
1. a kind of boiler secondary air duct flow field current equalizer comprising have the hot secondary air duct import of burner hearth, the hot Secondary Air of burner hearth
The hot secondary air duct of burner hearth of road outlet, be connected with the hot secondary air duct of the burner hearth with wall secondary air duct outlet after burner hearth
Wall secondary air duct after burner hearth, the hot secondary air duct of burner hearth have at least one steering portion, it is characterised in that: the burner hearth heat two
At least one first deflector is equipped in the steering portion in secondary air duct, in the direction of first deflector one end and the steering portion
The extending direction of the hot secondary air duct of the burner hearth of trip is consistent, direction and the steering portion downstream of the first deflector other end
The extending direction of the hot secondary air duct of burner hearth is consistent.
2. boiler secondary air duct according to claim 1 flow field current equalizer, it is characterised in that: the hot Secondary Air of burner hearth
The steering portion in road is in 90 ° of arc-shaped transitions.
3. boiler secondary air duct according to claim 1 or 2 flow field current equalizer, it is characterised in that: first water conservancy diversion
Plate is arc-shaped, and first deflector is identical as the bending direction of the steering portion.
4. boiler secondary air duct according to claim 1 flow field current equalizer, it is characterised in that: the hot Secondary Air of burner hearth
There are two the hot secondary air duct import of the burner hearth, two hot secondary air ducts of burner hearth to export for stage property, and wall is secondary after the burner hearth
Air duct includes wall secondary air duct after wall secondary air duct, the second burner hearth after the first burner hearth, wall secondary air duct after first burner hearth, the
Burner hearth of the wall secondary air duct respectively between the hot secondary air duct import of the burner hearth, the hot secondary air duct outlet of burner hearth is warm after two burner hearths
Secondary air duct is connected.
5. boiler secondary air duct according to claim 4 flow field current equalizer, it is characterised in that: wall after first burner hearth
The connectivity part of wall secondary air duct and the hot secondary air duct of burner hearth is equipped with air distributor after secondary air duct, the second burner hearth.
6. boiler secondary air duct according to claim 1 flow field current equalizer, it is characterised in that: wall is secondary after the burner hearth
Air duct and the hot secondary air duct connectivity part of the burner hearth are set to the hot secondary air duct outlet upstream of the burner hearth.
7. boiler secondary air duct according to claim 6 flow field current equalizer, it is characterised in that: the hot Secondary Air of burner hearth
The upstream of wall secondary air duct and the hot secondary air duct connectivity part of burner hearth is equipped with air measuring element after being located at the burner hearth in road.
8. boiler secondary air duct according to claim 7 flow field current equalizer, it is characterised in that: the air measuring element
Upstream be equipped with air-flow even distributor.
9. boiler secondary air duct according to claim 8 flow field current equalizer, it is characterised in that: the air-flow even distributor with
The hot secondary air duct interior air-flow of burner hearth flows to face setting.
10. boiler secondary air duct according to claim 8 flow field current equalizer, it is characterised in that: the air-flow even distributor
Upstream be equipped at least one second deflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228292.4U CN209295181U (en) | 2018-08-01 | 2018-08-01 | Flow field flow equalizing device for secondary air duct of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228292.4U CN209295181U (en) | 2018-08-01 | 2018-08-01 | Flow field flow equalizing device for secondary air duct of boiler |
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| Publication Number | Publication Date |
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| CN209295181U true CN209295181U (en) | 2019-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821228292.4U Active CN209295181U (en) | 2018-08-01 | 2018-08-01 | Flow field flow equalizing device for secondary air duct of boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289278A (en) * | 2020-02-20 | 2020-06-16 | 苏州西热节能环保技术有限公司 | Method for evaluating effect of hedging coal-fired boiler after secondary air box flow field transformation |
| CN113983489A (en) * | 2021-10-09 | 2022-01-28 | 苏州西热节能环保技术有限公司 | Secondary air distribution method for active corrosion prevention of opposed firing boiler |
| CN114151788A (en) * | 2021-12-02 | 2022-03-08 | 无锡华光环保能源集团股份有限公司 | Secondary air pipe structure of circulating fluidized bed boiler |
-
2018
- 2018-08-01 CN CN201821228292.4U patent/CN209295181U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289278A (en) * | 2020-02-20 | 2020-06-16 | 苏州西热节能环保技术有限公司 | Method for evaluating effect of hedging coal-fired boiler after secondary air box flow field transformation |
| CN113983489A (en) * | 2021-10-09 | 2022-01-28 | 苏州西热节能环保技术有限公司 | Secondary air distribution method for active corrosion prevention of opposed firing boiler |
| CN113983489B (en) * | 2021-10-09 | 2024-01-19 | 苏州西热节能环保技术有限公司 | Secondary air distribution method for active corrosion prevention of opposed firing boiler |
| CN114151788A (en) * | 2021-12-02 | 2022-03-08 | 无锡华光环保能源集团股份有限公司 | Secondary air pipe structure of circulating fluidized bed boiler |
| CN114151788B (en) * | 2021-12-02 | 2023-11-21 | 无锡华光环保能源集团股份有限公司 | Secondary air pipe structure of circulating fluidized bed boiler |
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