CN208253570U - Pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler - Google Patents
Pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler Download PDFInfo
- Publication number
- CN208253570U CN208253570U CN201820818471.7U CN201820818471U CN208253570U CN 208253570 U CN208253570 U CN 208253570U CN 201820818471 U CN201820818471 U CN 201820818471U CN 208253570 U CN208253570 U CN 208253570U
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- China
- Prior art keywords
- air
- eddy flow
- cfb boiler
- spray wind
- ballistic
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- 238000007664 blowing Methods 0.000 title claims abstract description 18
- 239000007921 spray Substances 0.000 claims abstract description 46
- 239000003245 coal Substances 0.000 claims abstract description 22
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract 3
- 230000003447 ipsilateral effect Effects 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 206010008190 Cerebrovascular accident Diseases 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 208000006011 Stroke Diseases 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model protects a kind of CFB boiler just to go up pipe laying eddy flow blowing device in Quadratic ballistic, spray wind supervisor comprising the cantilever-shaped insertion CFB boiler burner hearth of plural number, it is set to right above coal feeding hole, spray wind supervisor's tube wall lower half sets the downward eddy flow spray wind of several apertures, spray wind supervisor is both connected in air feed main pipe, the windward side for spraying wind supervisor is equipped with abrasionproof air cavity structure, it is the ring film air cavity for spraying the air cavity wall of wind supervisor's windward side and surrounding, air feed main pipe also provides Secondary Air to ring film air cavity and forms abrasionproof film state wind, the oval ducts of short axle level or the eccentric varying-arca channel of baseline levels can be used in air feed supervisor, the utility model can strengthen the mass transfer between Secondary Air and as-fired coal stream, to effectively promote the efficiency of combustion of CFB boiler.
Description
Technical field
The utility model relates to CFB boilers, belong to field of dynamic engineering.
Background technique
CFB boiler compared with coal-powder boiler major defect first is that boiler efficiency is low, and wherein mechanical incomplete combustion heat waste
It is especially outstanding for losing the shortcomings that q4 is greater than coal-powder boiler.
Current CFB boiler configures upper layer and lower layer Secondary Air in coal feeding hole two sides, and wind coal quality transmission effect is poor, exists
" oxygen-rich area " and " Fu Meiqu ", " oxygen-enriched " and " fuel-rich " (including gaseous combustible object and flammable carbon) due to lateral motion capability not
Foot, cannot achieve best combination, can only be in respective region uplink all the way, until furnace outlet, especially in cyclone separator
Combustion reaction, as existing " after-burning " phenomenon of CFB boiler are partially completed after meeting." after-burning " is that boiler design must be examined
The main problem of worry.
The fine particle that separator can not capture is removed to have an opportunity to reenter furnace internal combustion when being equipped with fly ash re-injection system
It burns and releases outside heat, remaining overwhelming majority can only hope furnace heave a sigh, be to give up, as the mainstream of unburned carbon in flue dust by treasured.Separator
The larger particles separated are after by material returning device loopback burner hearth, after multiple circulating combustion, levigate, also have part because most
Burner hearth cannot be backed into again eventually, flying marking main forces are added.
The existing mode for being passed through Secondary Air, as shown in Figure 1, multiple overfiren air ports are arranged on preceding (rear) wall, but in this way
Mode be easy to cause Secondary Air and coal dust that cannot be sufficiently mixed burning, and efficiency of combustion is low, and how to reduce this part and not exclusively fire
Heat loss, improving combustion efficiency caused by burning are current urgent problems to be solved.
Utility model content
The technical issues of the utility model is solved is providing pipe laying eddy flow spray in a kind of just upper Quadratic ballistic of CFB boiler
Blowing apparatus.
Technological means used by the utility model is as described below.
Pipe laying eddy flow blowing device in a kind of just upper Quadratic ballistic of CFB boiler, includes the cantilever-shaped insertion CFB boiler furnace of plural number
The spray wind of thorax is responsible for, and each spray wind supervisor is set to the surface of coal feeding hole, and the tube wall lower half of the spray wind supervisor is set
Several apertures, spray downwards wind.
The plural number spray wind supervisor is both connected in air feed main pipe, which is passed through Secondary Air.
The spray wind supervisor is set to right above coal feeding hole, is arranged with the ipsilateral setting of coal feeding hole or opposite side.
Cyclone is arranged in the tapping.
Plural eddy flow is blown branch pipe built in the aperture.
The windward side of the spray wind supervisor is equipped with abrasionproof air cavity structure.
The abrasionproof air cavity structure includes the air cavity wall for being located at spray wind supervisor's windward side, between the air cavity wall and spray wind supervisor
Form ring film air cavity, a side of the air cavity wall and upper end by closed plate and spray wind supervisor's connection closing, the air cavity wall it is another
One side is not closed, and ring film air cavity air outlet is formed, and the plural number spray wind supervisor is both connected in air feed main pipe, the air feed main pipe
It is passed through Secondary Air, boundary jet stream air duct is set in the air feed main pipe, which includes that several branches connect respectively
Connect the blast pipe.
The spray wind supervisor uses oval ducts, and short axle is horizontally disposed.
The spray wind supervisor uses the eccentric varying-arca channel of baseline levels, and the section of spray wind supervisor is by outer end to inner end side
To being gradually reduced.
The beneficial effects of the utility model are as follows.
1, the utility model can effectively solve the problems, such as CFB boiler " anoxic zone " air feed, and oxygen amount and fuel combustion is made to need wind
Realize the time-space registration of maximum possible.
2, tube wall and flue gas particle are mainly washed away stream isolation by using air film and are solved by the abrasionproof problem of pipeline itself
Certainly, other conventional Precautionary Measures can be used in addition, abrasion will not become worrying problem, and even if pipeline is locally worn out, it is empty
Gas leaks, and only influences the controlled direction of air-flow and flow, handles without blowing out.
3, air feed supervisor uses cantilevered fashion, and thermal expansion is unrestricted, and root temperature is low, intensity highest, with force request
Wind is sprayed downwards when being adapted, and running, and can offset part gravity.
4, after the utility model is implemented, q3, q4 loss can be directly reduced, according to difference situations such as coal, boiler can be improved
Efficiency 1 ~ 3% or so, to extend the earth limited coal resources service life.
5, due to the raising of boiler efficiency, coal consumption is reduced in the unit time, and the utility model can directly reduce pollutant
Discharge, and improve lime-ash (because phosphorus content reduces) quality.
6, the utility model can also reduce furnace height and secondary air fan pressure head, to reduce engineering initial cost and operation electricity
Consumption.
7, the utility model can also break through the limit of CFB boiler design breadth depth ratio.
Detailed description of the invention
Fig. 1 is the position view of existing coal feeding hole and upper overfiren air port on preceding (rear) wall.
Furnace inner second air pipe and boundary jet stream blowing system schematic top plan view in Fig. 2 the utility model.
Fig. 3 is the utility model apoplexy pipe ring film abrasionproof air cavity structural schematic diagram.
Fig. 4 is the utility model apoplexy pipe ring film abrasionproof air cavity structural section schematic diagram.
Fig. 5 is that coal feeding hole and the face the A-A position of just upper secondary spray wind supervisor are illustrated on preceding (rear) wall in the utility model
Figure.
Specific embodiment
The utility model protects a kind of CFB boiler just to go up pipe laying eddy flow blowing device in Quadratic ballistic.
As shown in Figure 1, including plural number spray wind supervisor 2.Wind supervisor 2 is sprayed with cantilever-shaped insertion CFB boiler burner hearth.Plural number spray wind
Supervisor 2 is all connected with the air feed main pipe 1 for being connected to second heat air duct.
As shown in figure 5, the position of spray wind supervisor 2 is set to the surface of coal feeding hole 5.Spray the lower half that wind is responsible for 2 tube walls
Aperture, the i.e. direction of aperture are windward side, and cyclone built in aperture sprays wind, the percent opening of aperture, hole for Secondary Air eddy flow
Type, aperture etc. are set according to specific actual conditions.
As shown in Figures 2 and 3, the windward side of spray wind supervisor 2 is equipped with abrasionproof air cavity structure 4, and it includes in windward side half-turn
Air cavity wall 41, the air cavity wall 41 and spray wind is responsible between 2 tube walls and forms ring film air cavity 43, a side of air cavity wall 41 and upper end
It is connect closing with spray wind supervisor 2 by closed plate 42, another side of air cavity wall 41 is not closed, and ring film air cavity air outlet is formed
44, air cavity wall 41 is equipped with blast pipe 45.
Above-mentioned air feed main pipe 1 is also connected with boundary jet stream air duct 3, is equipped with several branches and is separately connected above-mentioned abrasionproof gas
The blast pipe 45 of cavity configuration 4 provides Secondary Air to form windward side ring-type abrasionproof film state wind.
It sprays wind supervisor 2 and uses oval ducts, short axle is horizontally disposed, or the eccentric variable cross-section of baseline levels can be used
The direction of pipeline, outer end section to the interior end section of spray wind supervisor 2 is gradually reduced.
In actual use, the flow that Secondary Air is passed through is controlled by the valve in air feed main pipe 1, is responsible for into each spray wind
Wind is sprayed to lower eddy flow after 2, secondary spray wind is directly sent at the coal feeding hole as-fired coal stream of lower section at this time, compared with conventional side air distribution,
Wind is easier to mix with coal stream, improving combustion efficiency.Entered simultaneously by the valve control Secondary Air of boundary jet stream air duct 3 anti-
The flow that air cavity structure forms film state wind is ground, to adjust abrasionproof function according to eddy flow status requirements practical in burner hearth.
The utility model can effectively solve the problems, such as CFB boiler " anoxic zone " air feed, and oxygen amount and fuel combustion is made to need wind real
The time-space registration of existing maximum possible, and the abrasionproof problem of pipeline itself mainly washes away tube wall and flue gas particle by using air film
Stream isolation is resolved, and other conventional Precautionary Measures can be used in addition, and abrasion will not become worrying problem, and even if pipeline
Part is worn out, and air leaks, and only influences the controlled direction of air-flow and flow, handles without blowing out.Air feed supervisor uses
Cantilevered fashion, thermal expansion is unrestricted, and root temperature is low, intensity highest, sprays downwards when being adapted, and running with force request
Wind can offset part gravity.
After the utility model is implemented, q3, q4 loss can be directly reduced, according to difference situations such as coal, boiler effect can be improved
Rate 1 ~ 3% or so, to extend the earth limited coal resources service life.
Due to the raising of boiler efficiency, coal consumption is reduced in the unit time, and the utility model can directly reduce the row of pollutant
It puts, and improves lime-ash (because phosphorus content reduces) quality.
In addition, the utility model can also reduce furnace height and secondary air fan pressure head, to reduce engineering initial cost and fortune
Row power consumption.
Claims (9)
1. pipe laying eddy flow blowing device in a kind of just upper Quadratic ballistic of CFB boiler, which is characterized in that include the cantilever-shaped insertion of plural number
The spray wind of CFB boiler burner hearth is responsible for (2), and each spray wind supervisor (2) is set to the surface of coal feeding hole, the spray wind supervisor
(2) tube wall lower half sets several apertures, sprays wind downwards.
2. pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler as described in claim 1, which is characterized in that described
Plural number spray wind supervisor (2) is both connected on air feed main pipe (1), which is passed through Secondary Air.
3. pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler as described in claim 1, which is characterized in that described
Spray wind supervisor (2) is set to right above coal feeding hole (5), is arranged with the ipsilateral setting of coal feeding hole or opposite side.
4. pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler as described in claim 1, which is characterized in that described
Cyclone is arranged in tapping.
5. pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler as described in claim 1, which is characterized in that described
Plural eddy flow is blown branch pipe built in aperture.
6. pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler as described in claim 1, which is characterized in that described
The windward side for spraying wind supervisor (2) is equipped with abrasionproof air cavity structure (4).
7. pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler as claimed in claim 6, which is characterized in that described
Abrasionproof air cavity structure (4) includes the air cavity wall (41) for being located at spray wind supervisor's (2) windward side, the air cavity wall (41) and spray wind supervisor
(2) ring film air cavity (43) are formed between, a side and upper end for the air cavity wall (41) passes through closed plate (42) and spray wind supervisor (2)
Connection closing, another side of the air cavity wall (41) are not closed, and are formed ring film air cavity air outlet (44), and air cavity wall (41) is equipped with
Blast pipe (45)；
The plural number spray wind supervisor (2) is both connected on air feed main pipe (1), which is passed through Secondary Air, the air feed
Boundary jet stream air duct (3) is also set in main pipe (1), the boundary jet stream air duct (3) include several branches be separately connected it is described into
Air hose (45).
8. pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler as described in claim 1 to 7 is any, feature exist
In the spray wind supervisor (2) uses oval ducts, and short axle is horizontally disposed.
9. pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler as described in claim 1 to 7 is any, feature exist
In the spray wind supervisor (2) uses the eccentric varying-arca channel of baseline levels, and the section of spray wind supervisor (2) is by outer end to inner end
Direction is gradually reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820818471.7U CN208253570U (en) | 2018-05-29 | 2018-05-29 | Pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820818471.7U CN208253570U (en) | 2018-05-29 | 2018-05-29 | Pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208253570U true CN208253570U (en) | 2018-12-18 |
Family
ID=64651619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820818471.7U Withdrawn - After Issue CN208253570U (en) | 2018-05-29 | 2018-05-29 | Pipe laying eddy flow blowing device in the just upper Quadratic ballistic of CFB boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208253570U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542080A (en) * | 2018-05-29 | 2019-12-06 | 中国电力工程顾问集团华北电力设计院有限公司 | Swirl injection device for embedded pipe of directly-upper secondary air furnace of CFB (circulating fluid bed) boiler |
-
2018
- 2018-05-29 CN CN201820818471.7U patent/CN208253570U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542080A (en) * | 2018-05-29 | 2019-12-06 | 中国电力工程顾问集团华北电力设计院有限公司 | Swirl injection device for embedded pipe of directly-upper secondary air furnace of CFB (circulating fluid bed) boiler |
| CN110542080B (en) * | 2018-05-29 | 2024-05-10 | 中国电力工程顾问集团华北电力设计院有限公司 | Built-in pipe rotational flow blowing device in overgrate air furnace directly above CFB boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181218 Effective date of abandoning: 20240510 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20181218 Effective date of abandoning: 20240510 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |