CN206055610U - A kind of CFB boiler nested type blast cap air-distribution device - Google Patents
A kind of CFB boiler nested type blast cap air-distribution device Download PDFInfo
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- CN206055610U CN206055610U CN201620897250.4U CN201620897250U CN206055610U CN 206055610 U CN206055610 U CN 206055610U CN 201620897250 U CN201620897250 U CN 201620897250U CN 206055610 U CN206055610 U CN 206055610U
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- airducts
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Abstract
A kind of CFB boiler nested type blast cap air-distribution device, belongs to circulating fluidized-bed combustion boiler air distribution plate renovation technique field.Including being provided with the air compartment in air channel, card, air distribution plate castable, A airducts, reinforcing sleeve, B airducts, pad, " I " type blast cap, water-cooling wall pipe of burner hearth；Card is located at air compartment top, water-cooling wall pipe of burner hearth is uniformly located at below card, air distribution plate castable leaves being laid on card of space, B airducts are nested in inside A airducts, and extend in air compartment through card, the upper end of A airducts is mutually fixed with B airducts by pad, reinforcing sleeve is fixedly installed on the intersection of A airducts and card, it is located above A airducts on the top of B airducts and offers the little air holes of B airducts, " I " type blast cap is buckled in the top of A airducts, and " I " type blast cap exhaust vent is further opened with " I " type blast cap.The problems such as this utility model solves cloth wind lack of homogeneity bed, warm skewness, air compartment leakage slag, primary air fan power consumption and increases.
Description
Technical field
This utility model belongs to circulating fluidized-bed combustion boiler air distribution plate renovation technique field, and in particular to a kind of CFB
Boiler nested type blast cap air-distribution device.
Background technology
At present, China has been to use the most country of CFBB (CFB boiler) in power plant in the world, has been transported
Capable large and small cycles fluid bed station boiler has 2000 multiple stage, and the large-size circulating fluidized bed station boilers of wherein more than 410t/h have
140 multiple stage.Air distribution plate is transported through prolonged as one of vitals for ensureing the normal fluidized bed combustion of CFBB
OK, in the case of off-design air distribution plate resistance, wind causes guide duct wind-eye worn out with the long term of bed, airduct and blast cap
Overtemperature carbonization comes off, wear and rupture is serious, causes bed to cause serious dust stratification from conduit into inside water cooled wind chamber；Directly more
The technique (removing blast cap-air distribution plate castable dismounting-catheter cannula dismounting-conduit to remove) for changing guide duct is extremely loaded down with trivial details.
Blast cap and air distribution plate are the critical components of CFBB, and their drag characteristic and slag anti-leaking performance is direct
Affect the operation of CFBB.How economically to realize even distributing wind and avoid Lou slag from being that blast cap and air distribution plate design change
Make the middle matter of utmost importance that need to be solved.From from the point of view of energy-conservation, the resistance of air distribution plate is a unfavorable factor, should drop more low more
It is good.But it is a beneficial factor to cloth wind homogenization, stability again.Without certain resistance, cloth wind homogenization is difficult to,
Fluidised stability is also difficult to maintain.Especially when the shared ratio in fluidized system of the resistance of air distribution plate is too small,
Once there is bias current in bed, air-flow will more be intended to the less part of resistance, so that there is channel, other places form dead
Area.Blast cap serious wear after longtime running is accordingly, there exist, is caused part bed to drain to cooling air compartment, is caused air distribution plate to leave the bed
The bulk deposition of material, is not only difficult to clear up, while the problems such as blast cap leakage ash of exerting oneself for increasing First air is serious.
Utility model content
The purpose of this utility model be mainly solve boiler grid plate longtime running after, guide duct aperture and blast cap vent
There is serious abrasion, generation air distribution plate resistance is caused less than design load, cloth wind uniformity variation, bed temperature skewness, air compartment
The problems such as leakage slag, primary air fan power consumption increase, and a kind of CFB boiler nested type blast cap air-distribution device is provided.
For achieving the above object, the technical scheme adopted by this utility model is：A kind of CFB boiler nested type blast cap cloth wind
Device, including the air compartment for being provided with air channel；Wherein：It also include card, air distribution plate castable, A airducts, reinforcing sleeve, B airducts,
Pad, " I " type blast cap, water-cooling wall pipe of burner hearth；Described card is located at the top of air compartment, and described water-cooling wall pipe of burner hearth is uniform
Be located at below card, described air distribution plate castable is laid on card, and leaves space in card central authorities, described
B airducts are nested in inside A airducts, and all pass through the card for leaving space to extend in air compartment, and the upper end of the A airducts passes through
Pad is mutually fixed with B airducts, and described reinforcing sleeve is fixedly installed on the intersection of A airducts and card, in described B airducts
Top be located at A airducts above offer the little air holes of B airducts, described " I " type blast cap is buckled in the top of A airducts, described
" I " type blast cap on be further opened with " I " type blast cap exhaust vent.
Further preferred embodiment, the upper end of described A airducts is A by the connecting point position that pad and B airducts are mutually fixed
Airduct is less than at B airduct 60mm.
Described A airducts are Φ 70 × 5.5, and material is SA213-TP304H, and length is 538mm；B airducts are Φ 57 × 4,
Length 544mm, material are SA213-TP304H.
This utility model causes part bed to drain to cooling air compartment, causes cloth for blast cap serious wear after longtime running
The bulk deposition of bed under aerofoil, is not only difficult to clear up, while exerting oneself for First air is increased, using this utility model patent institute
State method to transform air distribution plate so that the situation of blast cap leakage ash is resolved.Compared with prior art, with following excellent
Point：Firstth, after being transformed to air distribution plate using method described in the utility model, as cloth wind uniformity is improved, boiler
Bed temperature relatively transform before reduce 15 DEG C or so, sunken bed temperature is run for denitration in the stove has active influence, while shortening
Open the stove time, and the uniformity of bed temperature can be prevented effectively from the coking risk of air distribution plate.Secondth, boiler grid plate resistance design
It is worth for 9.2kPa, air distribution plate is carried out transforming air distribution plate resistance using method described in the utility model and improved by original 8.4kPa
To 9.4kPa, the low situation of resistance before transformation is improved.Avoid in blast cap due to resistance distribution bias after resistance increase
And the deviation of the blast cap air outlet velocity for causing.Find that the fluidization quality of side wall region low regime is obtained after cooling fluiditing test
Improve.All in all, reduce exerting oneself for primary air fan so that about 1,440,000 kwh of primary air fan Spring Festival holidays power consumption, it is contemplated that burner hearth
Fluidisation and a required secondary wind total amount of burning are constant, the reduction of primary air flow corresponding secondary air flow after increasing, according to during operation
One secondary wind pressure 3:1 proportionate relationship, can show that the year economize on electricity of overfire air fan is about 1,080,000 kwh, then cloth wind uniformity after transforming
Improve about 2,520,000 kwh of the total power consumption of blower fan for reducing.3rd, as B airducts are nested in inside A airducts, do not only reach replacing and damage
The purpose of bad A airducts, solves the problems, such as that bed causes serious dust stratification into inside water cooled wind chamber；And simplify airduct more
Technique is changed, maintenance duration is shortened, manpower, material resources and financial resources are saved.4th, as B airducts caliber is less than A airducts, can improve
The low situation of air distribution plate resistance, raising air distribution plate resistance, and then improve the fluidization quality of burner hearth side wall low regime, reduce once
Exerting oneself for blower fan, saves station service.5th, B airduct about 60mm is less than for A airducts by A airducts and B airducts weld locations,
It is easy to weld and be unfavorable for abrasion, extends the life-span of airduct.6th, " I " type blast cap is buckled on A airducts, is alleviated to B airducts
Abrasion, protects B airducts, is conducive to extending the service life of B airducts.7th, process is greatly simplified, a large amount of without the need for removing
Castable, and change conduit and need to only remove blast cap and will be welded and fixed and a little break, you can conduit is changed, replacing conduit is greatly simplified
Work.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Specific embodiment
As shown in figure 1, a kind of CFB boiler nested type blast cap air-distribution device, including the air compartment 1 for being provided with air channel 12；Wherein：It
Also include card 2, air distribution plate castable 3, A airducts 4, reinforcing sleeve 5, B airducts 6, pad 7, " I " type blast cap 9, furnace water cooling
Wall pipe 11；Described card 2 is located at the top of air compartment, and described water-cooling wall pipe of burner hearth 11 is uniformly located at below card 2, institute
The air distribution plate castable 3 stated is laid on card 2, and leaves space in 2 central authorities of card, and described B airducts 6 are nested in A wind
Inside pipe 4, and the card 2 for leaving space is all passed through to extend in air compartment 1, the upper end of the A airducts 4 passes through pad 7 and B
Airduct 6 is mutually fixed, and described reinforcing sleeve 5 is fixedly installed on the intersection of A airducts 4 and card 2, in the upper of described B airducts 6
Portion is located at the top of A airducts 4 and offers the little air holes 8 of B airducts, and described " I " type blast cap 9 is buckled in the top of A airducts 4, described
" I " type blast cap 9 on be further opened with " I " type blast cap exhaust vent 10.
In the present embodiment, the upper end of described A airducts 4 is A wind by the connecting point position that pad 7 and B airducts 6 are mutually fixed
Pipe 4 is less than at B airduct 660mm.
Described A airducts 4 are Φ 70 × 5.5, and material is SA213-TP304H, length 538mm；B airducts 6 are Φ 57 × 4,
Length 544mm, material are SA213-TP304H.
Claims (3)
1. a kind of CFB boiler nested type blast cap air-distribution device, including the air compartment (1) for being provided with air channel (12)；It is characterized in that：It also wraps
Include card (2), air distribution plate castable (3), A airducts (4), reinforcing sleeve (5), B airducts (6), pad (7), " I " type blast cap
(9), water-cooling wall pipe of burner hearth (11)；, positioned at the top of air compartment, described water-cooling wall pipe of burner hearth (11) is uniform for described card (2)
It is located at below card (2), described air distribution plate castable (3) is laid on card (2), and leaves in card (2) central authorities
Space, described B airducts (6) are nested in A airducts (4) inside, and all pass through the card (2) for leaving space to extend to air compartment
(1) in, the upper end of the A airducts (4) is mutually fixed with B airducts (6) by pad (7), and described reinforcing sleeve (5) fixation sets
The intersection with card (2) in A airducts (4) is put, is located above A airducts (4) on the top of described B airducts (6) and is offered B
The little air holes of airduct (8), described " I " type blast cap (9) are buckled in the top of A airducts (4), also open on described " I " type blast cap (9)
It is provided with " I " type blast cap exhaust vent (10).
2. a kind of CFB boiler nested type blast cap air-distribution device according to claim 1, is characterized in that：Described A airducts
(4) upper end by the mutually fixed connecting point position of pad (7) and B airducts (6) for A airducts (4) less than B airducts (6) 60mm at.
3. a kind of CFB boiler nested type blast cap air-distribution device according to claim 1 and 2, is characterized in that：Described A wind
Pipe (4) is Φ 70 × 5.5, and material is SA213-TP304H, length 538mm；B airducts (6) are Φ 57 × 4, length 544mm, material
Matter is SA213-TP304H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620897250.4U CN206055610U (en) | 2016-08-17 | 2016-08-17 | A kind of CFB boiler nested type blast cap air-distribution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620897250.4U CN206055610U (en) | 2016-08-17 | 2016-08-17 | A kind of CFB boiler nested type blast cap air-distribution device |
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| Publication Number | Publication Date |
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| CN206055610U true CN206055610U (en) | 2017-03-29 |
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| CN201620897250.4U Active CN206055610U (en) | 2016-08-17 | 2016-08-17 | A kind of CFB boiler nested type blast cap air-distribution device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122952A (en) * | 2016-08-17 | 2016-11-16 | 山西平朔煤矸石发电有限责任公司 | A kind of CFB boiler nested type blast cap air-distribution device and remodeling method thereof |
-
2016
- 2016-08-17 CN CN201620897250.4U patent/CN206055610U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122952A (en) * | 2016-08-17 | 2016-11-16 | 山西平朔煤矸石发电有限责任公司 | A kind of CFB boiler nested type blast cap air-distribution device and remodeling method thereof |
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