CN206094055U - Hood structure and have its fluidized bed boiler - Google Patents
Hood structure and have its fluidized bed boiler Download PDFInfo
- Publication number
- CN206094055U CN206094055U CN201620758401.8U CN201620758401U CN206094055U CN 206094055 U CN206094055 U CN 206094055U CN 201620758401 U CN201620758401 U CN 201620758401U CN 206094055 U CN206094055 U CN 206094055U
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- inner sleeve
- blast cap
- cap
- cap structure
- outer tube
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Abstract
The utility model provides a hood structure and have its fluidized bed boiler, the hood structure includes interior sleeve pipe, the hood structure still includes: the outer tube, the sheathed tube outside including the overcoat pipe box is established, the lumen of outer tube is stretched out on interior sheathed tube top. The utility model provides a difficult problem of changing of interior sleeve pipe of the hood structure among the prior art has been solved to the hood structure.
Description
Technical field
The utility model is related to goods fluid field, in particular to a kind of cap structure and the fluid bed with it
Boiler.
Background technology
Blast cap is the vitals of supercritical circulating fluidized bed boiler (CFB), and the working environment of blast cap is especially severe, for a long time
In 900-1000 DEG C of hot environment, undergo the impact wear of cinder, lime stone, high temperature oxidation stability fate row is to blast cap high temperature
Serious wear.
Supercritical circulating fluidized bed boiler grid plate area is big, and blast cap arrangement quantity is 2 times of general recirculating fluidized bed,
Nearly 5000, primary air pressure is high.The quality of blast cap directly affects the fluidisation operating mode and combustion stability of CFB boiler, is CFB boiler
The guarantee of safe operation.
In unit operation, mouth and inner sleeve contact position under blast cap cover, geometry present situation mutation causes to be mutated stress concentration,
Because of high-temperature material impact wear, inner sleeve fracture is easily caused；Blast cap sleeve pipe for a long time bury in more than 900 DEG C of high-temperature material by leaching,
Sleeve pipe is red crisp to cause crackle；In shutdown inspection blast cap, the blast cap cage apertures eye to blocking carries out tapping during cleaning dredging, wind
The easy brittle fracture of cap inner sleeve, and because inner sleeve is embedded in wear-resisting pouring, therefore change difficult.
Blast cap inner sleeve ruptures to CFB is long-term, stably operation brings a series of problem, such as：
1) cloth wind is uneven, and normal fluidized state is destroyed, coking in bed in igniting, operation, and deslagging is not freely waited and showed
As can all cause the accident of blowing out fluid bed coking, and then jeopardize operation safety；
2) the inner sleeve fracture of blast cap, can cause burner hearth air distribution plate lime-ash, bed to leak in air compartment.Substantial amounts of lime-ash (bed
Material) Jing blast caps are leaked to water cooled wind chamber and ignition air duct, cumulative, can blocking primary air road, cause station service to raise, boiler effect
Rate declines, and affects economical operation, fluidisation operation normal to boiler to bring larger harm；
3) leaking slag can also be under the disturbance of First air, and wear and tear water cooled wind chamber water screen tube, causes boiler pressure-containing member to leak,
In turn result in shutdown.
Utility model content
Main purpose of the present utility model is to provide a kind of cap structure and the fluidized-bed combustion boiler with it, existing to solve
There is the not easily changeable problem of inner sleeve of the cap structure in technology.
To achieve these goals, according to one side of the present utility model, there is provided a kind of cap structure, including inner sleeve
Pipe, cap structure also includes：Outer tube, outer tube is set in the outside of inner sleeve, and the pipe of outer tube is stretched out on the top of inner sleeve
Chamber.
Further, the lower end of the upper end of outer tube and outer tube is welded with the outer wall of inner sleeve.
Further, cap structure also includes：Blast cap cover；Blast cap connector, blast cap connector is arranged on the top of inner sleeve
End, blast cap cover is arranged on inner sleeve by blast cap connector.
Further, blast cap connector includes location division and the connecting portion being connected with each other, and location division is positioned on inner sleeve,
Connecting portion is connected with blast cap cover.
Further, location division is connected with the inwall of inner sleeve, and the tube chamber of inner sleeve is stretched out in the free end of connecting portion.
Further, support level is provided with the inwall of inner sleeve, location division coordinates positioning with support level.
Further, connecting hole is provided with the cover bottom of blast cap cover, connecting portion is plugged in connecting hole.
Further, the free end of connecting portion is stretched out from connecting hole, and outer face and the connecting portion of blast cap cover are welded.
Further, the blast cap enclosure is located on inner sleeve, and inner sleeve on the body in blast cap cover is provided with air-out
Mouthful.
According to another aspect of the present utility model, there is provided a kind of fluidized-bed combustion boiler, including air distribution plate and it is arranged on cloth wind
Cap structure on plate, cap structure is above-mentioned cap structure.
Cap structure in the utility model includes inner sleeve and the outer tube that is set on the outside of inner sleeve, and inner sleeve
Outer tube is stretched out on top, and so, outer tube just can form the protective effect to inner sleeve, and be pacified inner sleeve using outer tube
It is mounted in furnace chamber, when inner sleeve is dismantled, it is only necessary to extract inner sleeve out from outer tube, solve wind of the prior art
The not easily changeable problem of the inner sleeve of cap.
Description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding to of the present utility model, this practicality
New schematic description and description is used to explain the utility model, does not constitute to improper restriction of the present utility model.
In the accompanying drawings：
Fig. 1 shows the structural representation of the embodiment according to cap structure of the present utility model；And
Fig. 2 shows the assembling schematic diagram between the inner sleeve of the cap structure in Fig. 1 and blast cap connector.
Wherein, above-mentioned accompanying drawing is marked including the following drawings：
10th, inner sleeve；11st, air outlet；20th, outer tube；30th, blast cap connector；31st, location division；32nd, connecting portion；40th, wind
Calotte；50th, blast cap cover sealing ring.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Below with reference to the accompanying drawings and in conjunction with the embodiments describing the utility model in detail.
A kind of cap structure is present embodiments provided, Fig. 1 and Fig. 2 is refer to, the cap structure includes inner sleeve 10, blast cap
Structure also includes：Outer tube 20, outer tube 20 is set in the outside of inner sleeve 10, and outer tube 20 is stretched out on the top of inner sleeve 10
Tube chamber.
Cap structure in the present embodiment includes inner sleeve 10 and is set in the outer tube 20 in the outside of inner sleeve 10, and inner sleeve
Outer tube 20 is stretched out on the top of pipe 10, and so, outer tube 20 just can form the protective effect to inner sleeve 10, and utilize overcoat
Pipe 20 is arranged on inner sleeve 10 in furnace chamber, when inner sleeve 10 is dismantled, it is only necessary to which by inner sleeve 10, extraction is from outer tube 20
Can, solve the not easily changeable problem of inner sleeve of cap structure of the prior art.
The connected mode between outer tube 20 and inner sleeve 10 in the present embodiment is, the upper end of outer tube 20 and outer tube
Weld with the outer wall of inner sleeve 10 20 lower end.
In the present embodiment, as described in Figure 1, cap structure also includes：Blast cap cover 40；Blast cap connector 30, blast cap connection
Part 30 is arranged on the top of inner sleeve 10, and blast cap cover 40 is arranged on inner sleeve 10 by blast cap connector 30.
In order to realize the connection between blast cap cover 40 and inner sleeve 10, the cap structure in the present embodiment also connects including blast cap
Fitting 30, is arranged on the blast cap cover 40 on inner sleeve 10 using blast cap connector 30.
In order to realize the fixation of blast cap connector 30, blast cap connector 30 includes location division 31 and the connecting portion being connected with each other
32, location division 31 is positioned on inner sleeve 10, and connecting portion 32 is connected with blast cap cover 40.
Because blast cap cover 40 is the outside that is located at inner sleeve 10, in order to realize this position restriction, location division 31 with it is interior
The inwall connection of sleeve pipe 10, the tube chamber of inner sleeve 10 is stretched out in the free end of connecting portion 32.So, the position of connecting portion 32 can just be made
One end outside inner sleeve 10 is connected with blast cap cover 40.
In order to realize the fixation to location division 31, as shown in Fig. 2 support level is provided with the inwall of inner sleeve 10, it is fixed
Position portion 31 coordinates positioning with support level.So, the location division 31 is placed on support level, just can be realized to location division
31 it is spacing.
In the present embodiment, as depicted in figs. 1 and 2, connecting hole is provided with the cover bottom of blast cap cover 40, connecting portion 32 is plugged
In connecting hole.By arranging connecting hole on the cover bottom of blast cap cover 40, can more easily by the company of being plugged in of connecting portion 32
Connect in hole, in order to the connection between connecting portion 32 and blast cap cover 40.
If only connecting portion 32 is plugged in connecting hole, the fixation between blast cap cover 40 and connecting portion 32 can not be realized
Connection, for this purpose, the free end of connecting portion 32 is stretched out from connecting hole, outer face and the connecting portion 32 of blast cap cover 40 are welded.
In the present embodiment, as shown in figure 1, blast cap cover 40 is set on inner sleeve 10, inner sleeve 10 positioned at blast cap cover
Air outlet 11 is provided with body in 40.By arranging air outlet 11 on the body in blast cap cover 40, can be with more convenient
Ground is by the gas stream in blast cap cover 40 to the gap between blast cap cover 40 and inner sleeve 10.
In the present embodiment, as shown in figure 1, one end of the close outer tube 20 of blast cap cover 40 is provided with flange part, this is convex
Edge is arranged with inner sleeve 10 is surround, and blast cap cover sealing ring 50 is folded between flange part and inner sleeve 10.
The present embodiment additionally provides a kind of fluidized-bed combustion boiler, including air distribution plate and the cap structure being arranged on air distribution plate,
Cap structure is above-mentioned cap structure.
Cap structure in the present embodiment is applied to overcritical large-size circulating fluidized bed station boiler.Recirculating fluidized bed pot
The furnace superintendent phase, stably run, it is desirable to which the material such as coal, ash in boiler must be fluidized well, therefore, supercritical steam cycle stream
The air-distribution device of fluidized bed boiler is very crucial, and blast cap is most crucial in air-distribution device and critical component.
In the present embodiment, the blast cap in cap structure is arranged on the air distribution plate of boiler, and Main Function is by fluidisation combustion
Wind required for material uniformly sends into burner hearth, meets the ciculation fluidized of boiler material.
Cap structure in the present embodiment can efficiently solve the inner sleeve of supercritical circulating fluidized bed boiler and easily break
Split, change the problem of difficulty.
Cap structure in the present embodiment takes split type, is made up of blast cap cover 40 and blast cap sleeve pipe.Blast cap sleeve pipe is adopted
Double-decker, that is, be divided into inner sleeve 10 and outer tube 20.There is the blast cap for connecting blast cap cover 40 to connect on the top of inner sleeve 10
Fitting 30, and the top of inner sleeve 10 is provided with multiple air outlets 11, the air outlet 11 along inner sleeve 10 circumferentially-spaced arrangement,
The air outlet 11 has 3 rows, often arranges 8, a diameter of 6.5mm of each air outlet 11.
Inner sleeve 10 in the present embodiment adopts the seamless heat-resisting alloy steel pipe manufacturing of shaping heat-resisting, wear-resisting, that anti-fragility is good,
Casting is not taken to pour part.Gap activity between inside and outside sleeve pipe coordinates, and is easily installed, dismounting and change.
In the present embodiment, the fixed form of blast cap cover 40 is fixed by former circumference and is changed to top fixed form, changes inner sleeve
During pipe 10, inner sleeve 10 is extracted from outer tube 20, be not required to remove high-abrasive material, it is simple, convenient.
Prove through practice operation, after the blast cap sleeve pipe use of said structure, blast cap sleeve pipe not easy fracture, blast cap tool
Have the advantage that：
1) high temperature resistant, resistance to maintenance, antiwear characteristic are strong, and good toughness, usage cycles are long；
2) manufacture craft is simple, it is high to manufacture success rate；
3) simple structure, installation, easy to operate, maintenance workload is little, economic and reliable, practical；
4) operation of the inner sleeve of replacing cap structure is simple, workload is little, the time is short.
When blast cap inner sleeve is changed, it is not necessary to remove and pour again the high-abrasive material of air distribution plate, it is not necessary to carry out resistance to
The baking maintenance of mill material, can immediately start unit after having constructed.General high-abrasive material baking maintenance needs 7-10 days, contracts significantly
Short time between overhauls(TBO) and the cost of overhaul.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
Claims (10)
1. a kind of cap structure, including inner sleeve (10), it is characterised in that the cap structure also includes：
Outer tube (20), the outer tube (20) is set in the outside of the inner sleeve (10), the top of the inner sleeve (10)
Stretch out the tube chamber of the outer tube (20).
2. cap structure according to claim 1, it is characterised in that the upper end of the outer tube (20) and the outer tube
(20) weld with the outer wall of the inner sleeve (10) lower end.
3. cap structure according to claim 1, it is characterised in that the cap structure also includes：
Blast cap cover (40)；
Blast cap connector (30), the blast cap connector (30) is arranged on the top of the inner sleeve (10), the blast cap cover
(40) by the blast cap connector (30) on the inner sleeve (10).
4. cap structure according to claim 3, it is characterised in that the blast cap connector (30) is including what is be connected with each other
Location division (31) and connecting portion (32), the location division (31) is positioned on the inner sleeve (10), the connecting portion (32) with
Blast cap cover (40) connection.
5. cap structure according to claim 4, it is characterised in that the location division (31) and the inner sleeve (10)
Inwall connects, and the tube chamber of the inner sleeve (10) is stretched out in the free end of the connecting portion (32).
6. cap structure according to claim 4, it is characterised in that be provided with support on the inwall of the inner sleeve (10)
Step, the location division (31) coordinates positioning with the support level.
7. the cap structure according to any one of claim 4 to 6, it is characterised in that the cover bottom of the blast cap cover (40)
On be provided with connecting hole, the connecting portion (32) is plugged in the connecting hole.
8. cap structure according to claim 7, it is characterised in that the free end of the connecting portion (32) is from the connection
Stretch out in hole, outer face and the connecting portion (32) of the blast cap cover (40) are welded.
9. cap structure according to claim 3, it is characterised in that the blast cap cover (40) is set in the inner sleeve
(10) on, the inner sleeve (10) on the body in the blast cap cover (40) is provided with air outlet (11).
10. a kind of fluidized-bed combustion boiler, including air distribution plate and the cap structure being arranged on the air distribution plate, it is characterised in that institute
The cap structure that cap structure is stated any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620758401.8U CN206094055U (en) | 2016-07-18 | 2016-07-18 | Hood structure and have its fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620758401.8U CN206094055U (en) | 2016-07-18 | 2016-07-18 | Hood structure and have its fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206094055U true CN206094055U (en) | 2017-04-12 |
Family
ID=58465477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620758401.8U Active CN206094055U (en) | 2016-07-18 | 2016-07-18 | Hood structure and have its fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206094055U (en) |
-
2016
- 2016-07-18 CN CN201620758401.8U patent/CN206094055U/en active Active
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