CN208204989U - Biomass CFB boiler smoke reverse-flow preventing device - Google Patents
Biomass CFB boiler smoke reverse-flow preventing device Download PDFInfo
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- CN208204989U CN208204989U CN201820186870.6U CN201820186870U CN208204989U CN 208204989 U CN208204989 U CN 208204989U CN 201820186870 U CN201820186870 U CN 201820186870U CN 208204989 U CN208204989 U CN 208204989U
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- flue gas
- flue
- sealing
- flow preventing
- cfb boiler
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Abstract
The utility model relates to a kind of biomass CFB boiler smoke reverse-flow preventing devices, including vertical feeder pipe, sealing bellows and flue gas recirculation flue, the vertical feeder pipe is equipped with pneumatic gate valve, flue gas recirculation flue one end is connected with back-end ductwork, the other end by the first branch pipe and the second branch pipe respectively with sealing air tank inlet and melt down smoke inlet and be connected, the smoke inlet that melts down is mounted between sealing bellows and burner hearth feeding inlet, and the back-end ductwork is sequentially connected deduster, air-introduced machine and chimney；Sealing bellows are mounted at the top of horizontal-feeding section with smoke inlet is melted down, and booster fan, booster fan outlet installation main road regulating valve are installed on the flue gas recirculation flue main road, and tail flue gas is recycled to sealing bellows by booster fan.The utility model can both prevent a small amount of flue gas anti-channeling can also UTILIZATION OF VESIDUAL HEAT IN using sealing air is formed after flue gas recycled pressurization；Increase bypass flue and pneumatic plate, when a large amount of flue gas anti-channelings upper furnace and lower part can fast pump, fast quick-recovery combustion chamber draft is significant to the safe operation of unit.
Description
Technical field
The utility model relates to biomass recirculating fluidized bed boilers, anti-more specifically to a kind of biomass CFB boiler
Flue gas inverse flow apparatus.
Background technique
The feed inlet of biomass recirculating fluidized bed boiler is usually located at emulsion zone, which is zone of positive pressure, works as combustion chamber draft
Fluctuate larger, when operation under positive pressure, furnace high-temperature flue gas is easy to ignite in feed bin from feeding inlet anti-channeling fuel and burns belt, even
Explosion accident occurs, seriously affects unit safety operation and operations staff's personal safety.Therefore, it develops one kind and effectively prevent flue gas
The device of anti-channeling is very necessary.
Utility model publication number CN202118900U and utility model publication number CN203478221U use sealing air
High-temperature flue gas in Sealing furnace, although playing certain sealing effect, when boiler positive pressure is larger, sealing air is not enough to seal positive pressure
High-temperature flue gas, there are certain security risks；Utility model publication number CN202532464 prevents flue gas anti-channeling using smoke barrier, though
So flue gas can be stopped to prevent flue gas anti-channeling, but when positive pressure is larger, turnover panel tends to interfere with feed and causes failure of fuel, while turnover panel
The defects of there is also sizings, bite；Invention patent publication number CN101995017A keeps off cigarette door machine structure using self-balancing, melts down cigarette
Road, blanking trench bottom twin-stage air distribution mechanism prevent flue gas anti-channeling by three mechanism linkages, but melt down flue connection combustion chamber draft
Flue gas cannot be not only withdrawn into negative pressuren zone when entire burner hearth positive pressure by area, increase flue gas anti-channeling path, twin-stage cloth wind instead
Mechanism, which is arranged, does not have sealing function not only in blanking trench bottom, hinders fuel to enter burner hearth instead.
Summary of the invention
The technical problem to be solved by the present invention is to, a kind of biomass CFB boiler smoke reverse-flow preventing device is provided,.
The technical scheme adopted by the utility model to solve the technical problem is as follows: constructing a kind of biomass CFB boiler Smoke prevention
Gas inverse flow apparatus, including vertical feeder pipe, sealing bellows and flue gas recirculation flue, the vertical feeder pipe are equipped with pneumatic insert
Plate valve, flue gas recirculation flue one end are connected with back-end ductwork, the other end by the first branch pipe and the second branch pipe respectively with
Sealing air tank inlet is connected with smoke inlet is melted down, it is described melt down smoke inlet be mounted on sealing bellows and burner hearth feeding inlet it
Between, the back-end ductwork is sequentially connected deduster, air-introduced machine and chimney；Sealing bellows and melt down smoke inlet be mounted on level to
Expect at the top of section, booster fan, booster fan outlet installation main road regulating valve, pressurization are installed on the flue gas recirculation flue main road
Tail flue gas is recycled to sealing bellows by blower.
In above scheme, flue gas recirculation flue is equipped with bypass flue, installs bypass door on the bypass flue.
In above scheme, sealing air regulating valve is installed, flue gas adjusting is melted down in installation on the second branch pipe on first branch pipe
Valve.
In above scheme, temperature measuring device is installed in the pneumatic gate valve front end.
In above scheme, the section of the spout of the sealing bellows is rectangle, and the incident direction of spout sealing air is level
Feed stage lower end and spout central line line direction.
In above scheme, the spout sealing air incident pressure is not less than 0.3Mpa.
The biomass CFB boiler smoke reverse-flow preventing device for implementing the utility model, has the advantages that
1, the utility model can both prevent a small amount of flue gas anti-channeling can also using sealing air is formed after flue gas recycled pressurization
UTILIZATION OF VESIDUAL HEAT IN；Increase bypass flue and pneumatic plate, when a large amount of flue gas anti-channelings upper furnace and lower part can fast pump, it is quickly extensive
Multiple combustion chamber draft, it is significant to the safe operation of unit.
2, flue gas recirculation flue one end is connected to back-end ductwork Absolute Negative Pressure area, enters upper furnace and lower part when positive pressure
Material mouth is smoked simultaneously, and boiler is quickly made to restore normal negative pressure；Controlling pneumatic gate valve by temperature alarming ensures that quick closedown is anti-
Only flue gas anti-channeling；Spout and horizontal-feeding section end line are sealing air incident direction, and not only improving prevents flue gas anti-channeling, also has
Enter furnace conducive to fuel.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is the structural schematic diagram of the utility model biomass CFB boiler smoke reverse-flow preventing device；
Fig. 2 is the spout incidence gas curtain schematic diagram of the utility model biomass CFB boiler smoke reverse-flow preventing device；
Fig. 3 is the sealing bellows top view of the utility model biomass CFB boiler smoke reverse-flow preventing device.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now control attached drawing is detailed
Illustrate specific embodiment of the present utility model.
As shown in Figure 1-3, the biomass CFB boiler smoke reverse-flow preventing device of the utility model include: vertical feeder pipe 1,
Pneumatic gate valve 2, sealing bellows 3, flue gas recirculation flue 4, back-end ductwork 5, melt down smoke inlet 6, sealing air regulating valve 7,
Melt down smoke regulating valve 8, horizontal-feeding section 9, booster fan 10, main road regulating valve 11, bypass flue 12, bypass door 13, burner hearth
Feeding inlet 14, spout 15, deduster 16, air-introduced machine 17, chimney 18.
Pneumatic gate valve 2 is arranged on vertical feeder pipe 1, and pneumatic gate valve 2 provides power by compressed air can be quick
Switch.Installation seals bellows 3 and melts down smoke inlet 6 at the top of horizontal-feeding section 9.Main flue gas recirculating gas duct 4 passes through first
Pipe and the second branch pipe with seal bellows 3 and melt down smoke inlet 6 and connect.Sealing air is installed respectively on first branch pipe and the second branch pipe
Regulating valve 7 melts down smoke regulating valve 8.Back-end ductwork 5 is sequentially connected deduster 16, air-introduced machine 17 and chimney 18.Seal bellows 3
It is tight with being welded at the top of horizontal-feeding section 9, it prevents from leaking out.
Temperature measuring device is installed before pneumatic gate valve 2, the pneumatic gate valve quick closedown when flue gas anti-channeling overtemperature.Flue gas
Booster fan 10 and main road regulating valve 11 are installed, it is negative that flue gas recirculation entrance is mounted on back-end ductwork 5 on 4 main road of recirculating gas duct
Pressure area.
Booster fan 10 and main road regulating valve 11 are included by 12 start of installation of bypass flue and final position, bypass cigarette
Bypass door 13 is installed on road 12.
It melts down smoke inlet 6 to be mounted between sealing bellows 3 and burner hearth feeding inlet 14, width and horizontal-feeding section 9 are the same as wide.
It seals 3 width of bellows and horizontal-feeding section 9 is of same size, 15 section of spout is rectangle, width and sealing 3 phase of bellows
Together, sealing air is through 3 even distributing wind of bellows, through the incident sealing air of rectangular jet 15.
It seals and arranges spout 15 in bellows, the incident sealing air angle of spout 15 is different, and sealing air incident direction is given for level
Expect 9 lower end of section and 15 center line line direction of spout.Sealing air can form lock flue gas curtain can also be with strength conveying.Sealing
Even distributing wind, which forms gas curtain through spout 15, after the sealed bellows 3 of wind prevents flue gas anti-channeling, and the incident sealing wind pressure of spout 15 is not
Lower than 0.3Mpa.
Utility model works principle is as follows:
(1) when operating normally, 2 standard-sized sheet of pneumatic gate valve, biomass fuel enters horizontal-feeding section 9 by vertical feeder pipe 1,
Enter furnace burning through burner hearth feeding inlet 14 under screw(-type) feeder effect, main road regulating valve 11 and sealing air regulating valve 7 are opened, bypass
Door 13 is closed with smoke regulating valve 8 is melted down, and the recycled flue 4 of flue gas recycled is sent into even distributing wind after sealing bellows 3, through square
Shape spout 15 forms a small amount of anti-channeling flue gas of gas curtain seals.
(2) when burner hearth emits positive pressure, when a large amount of flue gases are by burner hearth 14 anti-channeling of feeding inlet, the pneumatic plate of temperature measuring device alarm
2 quick closedown of valve, while booster fan 10 is shut down, main road regulating valve 11 and sealing air regulating valve 7 are closed, and bypass door 13 and are melted down
Smoke regulating valve 8 is opened, and anti-channeling flue gas is introduced after flue collector 4 by bypass flue 12 passes through chimney after 16 air-introduced machine 17 of deduster
18 are discharged into atmosphere.Air-introduced machine is evacuated simultaneously by upper furnace and lower part, fast quick-recovery combustion chamber draft, and step is pressed after normal operation
(1) it operates.
The embodiments of the present invention are described above in conjunction with attached drawing, but the utility model is not limited to
The specific embodiment stated, the above mentioned embodiment is only schematical, rather than restrictive, this field it is common
Technical staff is not departing from the utility model aims and scope of the claimed protection situation under the enlightenment of the utility model
Under, many forms can be also made, these are belonged within the protection of the utility model.
Claims (6)
1. a kind of biomass CFB boiler smoke reverse-flow preventing device, which is characterized in that including vertical feeder pipe (1), sealing bellows
(3) and flue gas recirculation flue (4), the vertical feeder pipe (1) are equipped with pneumatic gate valve (2), the flue gas recirculation cigarette
Road (4) one end is connected with back-end ductwork (5), the other end by the first branch pipe and the second branch pipe respectively with sealing bellows (3) entrance
Be connected with smoke inlet (6) is melted down, it is described melt down smoke inlet (6) be mounted on sealing bellows (3) and burner hearth feeding inlet (14) it
Between, the back-end ductwork (5) is sequentially connected deduster (16), air-introduced machine (17) and chimney (18)；It seals bellows (3) and melts down cigarette
Gas entrance (6) is mounted at the top of horizontal-feeding section (9), installs booster fan (10) on flue gas recirculation flue (4) main road,
Tail flue gas is recycled to sealing bellows (3) by booster fan (10) outlet installation main road regulating valve (11), booster fan (10).
2. biomass CFB boiler smoke reverse-flow preventing device according to claim 1, which is characterized in that flue gas recirculation cigarette
Road (4) is equipped with bypass flue (12), installs bypass door (13) on the bypass flue (12).
3. biomass CFB boiler smoke reverse-flow preventing device according to claim 1, which is characterized in that first branch pipe
Upper installation sealing air regulating valve (7), smoke regulating valve (8) are melted down in installation on the second branch pipe.
4. biomass CFB boiler smoke reverse-flow preventing device according to claim 1, which is characterized in that the pneumatic plate
Valve (2) front end is installed by temperature measuring device.
5. biomass CFB boiler smoke reverse-flow preventing device according to claim 1, which is characterized in that the sealing bellows
(3) section of spout (15) is rectangle, and the incident direction of spout (15) sealing air is horizontal-feeding section (9) lower end and spray
Mouth (15) center line line direction.
6. biomass CFB boiler smoke reverse-flow preventing device according to claim 5, which is characterized in that the spout (15)
Sealing air incident pressure is not less than 0.3Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820186870.6U CN208204989U (en) | 2018-02-02 | 2018-02-02 | Biomass CFB boiler smoke reverse-flow preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820186870.6U CN208204989U (en) | 2018-02-02 | 2018-02-02 | Biomass CFB boiler smoke reverse-flow preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208204989U true CN208204989U (en) | 2018-12-07 |
Family
ID=64534738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820186870.6U Expired - Fee Related CN208204989U (en) | 2018-02-02 | 2018-02-02 | Biomass CFB boiler smoke reverse-flow preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208204989U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631029A (en) * | 2019-01-31 | 2019-04-16 | 刘学冰 | Double fluidized-bed boiler cigarette wind flow field pressure and dynamic equilibrium regulator control system and method |
-
2018
- 2018-02-02 CN CN201820186870.6U patent/CN208204989U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631029A (en) * | 2019-01-31 | 2019-04-16 | 刘学冰 | Double fluidized-bed boiler cigarette wind flow field pressure and dynamic equilibrium regulator control system and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181207 Termination date: 20210202 |
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| CF01 | Termination of patent right due to non-payment of annual fee |