CN207486793U - A kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel - Google Patents
A kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel Download PDFInfo
- Publication number
- CN207486793U CN207486793U CN201721431177.2U CN201721431177U CN207486793U CN 207486793 U CN207486793 U CN 207486793U CN 201721431177 U CN201721431177 U CN 201721431177U CN 207486793 U CN207486793 U CN 207486793U
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- China
- Prior art keywords
- heat exchange
- exchange bed
- heat
- gas
- solid
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- 239000000446 fuel Substances 0.000 title claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 208000011580 syndromic disease Diseases 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000005587 bubbling Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 239000003818 cinder Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
A kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel contains burner hearth, an air compartment, cyclone separator, dipleg, material returning valve, scum pipe, back-end ductwork and gas-solid heat exchange bed；Gas-solid heat exchange bed is arranged in below an air compartment, and passes through connecting tube and gas-solid separating device is connect with burner hearth；Burner hearth is connect by scum pipe with gas-solid heat exchange bed.Gas-solid heat exchange bed includes heat exchange bed air compartment, heat exchange bed blast cap, heat exchange bed Heat Room and heat exchange bed scum pipe；The heat exchange bed air compartment is connect by gas piping with air preheater.A large amount of high-temperature ash are emitted by scum pipe in gas-solid heat exchange bed in burner hearth, and First air is passed through gas-solid heat exchange bed after air preheater heats, later into an air compartment.On the one hand the utility model can greatly improve a wind-warm syndrome, meet the needs of low heat value high-ash fuel stablizes burning, on the other hand can recycle the heat of a large amount of lime-ash of high-ash fuel, deslagging heat loss be reduced, so as to improve the boiler entirety thermal efficiency.
Description
Technical field
The utility model belongs to burning in circulating fluid bed boiler application field, discloses a kind of for the high ash of lower heat of combustion
Divide the circulating fluidized bed boiler of fuel.
Background technology
Circulating fluidized bed boiler has the advantages that fuel tolerance is wide, pollutant emission level is low etc., is widely used in bad
During matter burning of coal utilizes.China's low heat value high-ash fuel reserves are huge, such as oil shale semi-coke, spoil, current this kind of combustion
Material is most of using the means processing such as stacking, bury, only a small amount of higher quality for burning in circulating fluid bed boiler.It is led
It is exactly that this class A fuel A calorific value itself is low to want influence factor, is difficult to stablize burning under the conditions of general boiler design.In addition to this, this
Class A fuel A ash content is high, and bed drain purge is big, causes huge deslagging heat loss, and the boiler entirety thermal efficiency is very low.
Therefore, for low heat value high-ash fuel the characteristics of, design one kind can effectively recycle cinder heat loss and promote to fire
The circulating fluidized bed boiler that material stablizes burning is of great significance.
Utility model content
When the purpose of this utility model is for burning in circulating fluid bed boiler low heat value high-ash fuel, it is difficult to stablize combustion
The problem of being lost in the big calorimetric lime-ash of high ash content and then reducing boiler thermal efficiency is burnt, is provided a kind of for the high ash content of lower heat of combustion
The circulating fluidized bed boiler of fuel makes it that can not only meet the requirement that low heat value high-ash fuel stablizes burning, while can also
The effectively heat of recycling heat ash, reduces deslagging heat loss, improves boiler thermal efficiency.
The technical solution of the utility model is：
A kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel contains burner hearth, an air compartment, whirlwind point
From device, dipleg, material returning valve, scum pipe and back-end ductwork；Blast cap is evenly arranged on an air compartment top, is disposed in back-end ductwork
Superheater, economizer and air preheater, it is characterised in that：The circulating fluidized bed boiler further includes gas-solid heat exchange bed, gas-solid
Heat exchange bed is arranged on an air compartment in the following, an air compartment is connect by connecting tube with the top of gas-solid heat exchange bed, in connecting tube
Heat exchange bed gas-solid separating device is installed；The scum pipe is arranged symmetrically in the both sides of burner hearth bottom, and the burner hearth passes through deslagging
Pipe is connect with gas-solid heat exchange bed；The gas-solid heat exchange bed includes heat exchange bed air compartment, heat exchange bed blast cap, heat exchange bed Heat Room and heat exchange
Bed scum pipe；The heat exchange bed air compartment is connect by gas piping with air preheater.
Preferably, deslagging tube valve is equipped on the scum pipe.
Preferably, partition board, described two partition boards divide heat exchange bed Heat Room there are two settings in the heat exchange bed Heat Room
Into left Heat Room, intermediate heat transfer room and right Heat Room, be arranged symmetrically in the scum pipes of burner hearth bottom both sides respectively with left Heat Room
It is connected with the top of right Heat Room；The heat exchange bed scum pipe is arranged in the bottom of intermediate heat transfer room.
Preferably, gas-solid heat exchange bed sectional area is identical with the sectional area of upper furnace dilute-phase zone.
In above-mentioned technical proposal, iris type inertia separator or cyclonic separation can be used in the heat exchange bed gas-solid separating device
Device.
The utility model compared with prior art, has the following advantages and advantageous effect：1. due to increasing gas-solid heat exchange
Bed, can greatly improve a wind-warm syndrome, and about 200 DEG C of a wind-warm syndrome after general air preheater, the utility model is changed by gas-solid
Wind-warm syndrome can be increased to about 400 DEG C by hott bed, effectively recycle lime-ash heat, while is met low heat value high-ash fuel and stablized combustion
The requirement of burning；2. high-temperature hot ash is cooled down by First air, heat transfer temperature difference is big, good cooling results, can effectively recycle the heat of hot ash,
Deslagging heat loss is reduced, improves boiler thermal efficiency；3. arrangement partition board, hot ash are introduced into both sides Heat Room, turn in gas-solid heat exchange bed
Enter intermediate heat transfer room after crossing partition board, thus hot grey flow path can be increased, so as to increase the gas-solid heat exchange time, realize that gas-solid is filled
Divide heat exchange.
Description of the drawings
Fig. 1 is the concrete structure schematic diagram of the circulating fluidized bed boiler of the utility model.
Figure label：In figure：1- burner hearths；Air compartment of 2-；3- blast caps；4- scum pipes；5- deslagging tube valves；6- whirlwind point
From device；7- diplegs；8- material returning valves；9- back-end ductworks；10- superheaters；11- economizers；12- air preheaters；13- gas-solid heat exchanges
Bed；14- heat exchange bed air compartments；15- heat exchange bed blast caps；16- heat exchange bed Heat Rooms；The left Heat Rooms of 16a-；16b- intermediate heat transfers room；
The right Heat Rooms of 16c-；17- heat exchange bed scum pipes；18- connecting tubes；19- gas-solid separating devices；20- partition boards.
Specific embodiment
The concrete structure, principle and embodiment of the utility model embodiment are further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is a kind of knot of circulating fluidized bed boiler embodiment for lower heat of combustion high-ash fuel of utility model
Structure principle schematic, it contains 1, air compartment 2 of burner hearth, cyclone separator 6, dipleg 7, material returning valve 8 and back-end ductwork 9；Burner hearth 1
Bottom sides arrange scum pipe 4, and 2 top of air compartment is evenly arranged blast cap 3, superheater 10, economizer are included in back-end ductwork 9
11 and air preheater 12；Below an air compartment 2 increase a gas-solid heat exchange bed 13, an air compartment 2 by connecting tube 18 with
The top connection of gas-solid heat exchange bed 13, is equipped with gas-solid separating device 19, the heat exchange bed gas-solid separating device in connecting tube 18
19 can be used iris type inertia separator or cyclone separator.The scum pipe 4 is arranged symmetrically in the both sides of burner hearth bottom, burner hearth
1 is connect by scum pipe 4 with gas-solid heat exchange bed 13, and the scum pipe 4 sets deslagging tube valve 5.
The gas-solid heat exchange bed 13 includes heat exchange bed air compartment 14, heat exchange bed blast cap 15, heat exchange bed Heat Room 16 and heat exchange bed
Scum pipe 17；The heat exchange bed air compartment 14 is connect by gas piping with air preheater 12, and First air passes through air preheater
After 12 heating, into heat exchange bed air compartment 14, heat exchange bed Heat Room 16 is entered by heat exchange bed blast cap 15 after being uniformly distributed；Heat exchange bed
Heat exchange bed Heat Room to be divided into left Heat Room 16a, intermediate heat transfer by partition board 20, described two partition boards there are two settings in Heat Room 16
Tri- Heat Rooms of room 16b and right Heat Room 16c, be arranged symmetrically in the scum pipes of burner hearth bottom both sides respectively with left Heat Room 16a
It is connected with the top of right Heat Room 16c；The heat exchange bed scum pipe 17 is arranged in the bottom of intermediate heat transfer room 16b.
In order to ensure to be vigorous bubbling fluidization in gas-solid heat exchange bed, 13 sectional area of gas-solid heat exchange bed should on burner hearth 1
The sectional area of portion's dilute-phase zone is identical.
The operation principle and implementation process of the utility model are as follows：A large amount of high-temperature ash that stove chamber inner combustion generates, pass through
Scum pipe is discharged into gas-solid heat exchange bed Heat Room；After First air is heated by air preheater, into gas-solid heat exchange bed air compartment,
Heat exchange bed Heat Room is entered by heat exchange bed blast cap after even distribution；Gas-solid heat exchange bed sectional area is identical with roof of the furnace sectional area,
It is vigorous bubbling fluidization in gas-solid heat exchange bed；First air carries out gas-solid heat exchange with high-temperature hot ash in heat exchange bed Heat Room；
Setting partition board in Heat Room, lime-ash, which needs to climb over partition board under First air carrying, in 16a, 16c Heat Room enters 16b Heat Rooms,
So as to increase hot grey flow path, increase heat-exchange time；The First air fully heated in 16b Heat Rooms carries a part of lime-ash
Into the gas solid separation system in connecting tube, the solid separated drops back into heat exchange bed Heat Room, and First air continue up into
Enter an air compartment, burner hearth is sent by blast cap after being uniformly distributed in First air room；The lime-ash being fully cooled is from 16b Heat Rooms
Heat exchange bed scum pipe is discharged；Gas-solid high efficient heat exchanging can be realized in gas-solid heat exchange bed, so as to greatly improve a wind-warm syndrome, is returned simultaneously
The heat of lime-ash is received, improves the burning stablized burning, realize the high grey fuel of low heat value that a wind-warm syndrome is conducive to low calorie fuels
It utilizes, deslagging heat loss can be reduced by recycling the heat of lime-ash, improve boiler thermal efficiency.
The burning of stablizing that can realize low heat value high-ash fuel using the circulating fluidized bed boiler of the utility model utilizes,
The demand that low calorie fuels stablizes burning is not only met, the recycling of a large amount of lime-ash heats is also achieved, improves boiler thermal effect
Rate, whole boiler system is simple in structure, and arrangement is convenient, and operating cost is relatively low.
Claims (5)
1. a kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel contains burner hearth (1), an air compartment (2), rotation
Wind separator (6), dipleg (7), material returning valve (8), scum pipe (4) and back-end ductwork (9)；In the uniform cloth in air compartment (2) top
Blast cap (3) is put, is disposed with superheater (10), economizer (11) and air preheater (12) in back-end ductwork (9), feature exists
In：The circulating fluidized bed boiler further includes gas-solid heat exchange bed (13), and gas-solid heat exchange bed (13) is arranged under an air compartment (2)
Face, an air compartment (2) are connect by connecting tube (18) with the top of gas-solid heat exchange bed (13), and gas is equipped in connecting tube (18)
Solid separation device (19)；The scum pipe (4) is arranged symmetrically in the both sides of burner hearth bottom, and the burner hearth (1) passes through scum pipe (4)
It is connect with gas-solid heat exchange bed (13)；
The gas-solid heat exchange bed (13) is comprising heat exchange bed air compartment (14), heat exchange bed blast cap (15), heat exchange bed Heat Room (16) and changes
Hott bed scum pipe (17)；The heat exchange bed air compartment (14) is connect by gas piping with air preheater (12).
2. a kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel according to claim 1, feature
It is：Deslagging tube valve (5) is equipped on the scum pipe (4).
3. a kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel according to claim 1 or 2, special
Sign is：Setting is there are two partition board (20) in the heat exchange bed Heat Room (16), and described two partition boards are by heat exchange bed Heat Room
(16) it is divided into left Heat Room (16a), intermediate heat transfer room (16b) and right Heat Room (16c), it is described to be arranged symmetrically in burner hearth bottom two
Top of the scum pipe (4) of side respectively with left Heat Room (16a) and right Heat Room (16c) is connect；The heat exchange bed scum pipe
(17) it is arranged in the bottom of intermediate heat transfer room (16b).
4. a kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel according to claim 3, feature
It is：Gas-solid heat exchange bed (13) sectional area is identical with the sectional area of burner hearth (1) top dilute-phase zone.
5. a kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel according to claim 4, feature
It is：The heat exchange bed gas-solid separating device (19) is using iris type inertia separator or cyclone separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721431177.2U CN207486793U (en) | 2017-10-31 | 2017-10-31 | A kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721431177.2U CN207486793U (en) | 2017-10-31 | 2017-10-31 | A kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207486793U true CN207486793U (en) | 2018-06-12 |
Family
ID=62478621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721431177.2U Withdrawn - After Issue CN207486793U (en) | 2017-10-31 | 2017-10-31 | A kind of circulating fluidized bed boiler for lower heat of combustion high-ash fuel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207486793U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631294A (en) * | 2017-10-31 | 2018-01-26 | 清华大学 | A kind of CFBB for lower heat of combustion high-ash fuel |
-
2017
- 2017-10-31 CN CN201721431177.2U patent/CN207486793U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631294A (en) * | 2017-10-31 | 2018-01-26 | 清华大学 | A kind of CFBB for lower heat of combustion high-ash fuel |
| CN107631294B (en) * | 2017-10-31 | 2024-03-19 | 清华大学 | Circulating fluidized bed boiler for burning low-heat-value high-ash fuel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180612 Effective date of abandoning: 20240319 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180612 Effective date of abandoning: 20240319 |