CN203442806U - Afterburning device for boiler fly ash of circulating fluidized bed - Google Patents
Afterburning device for boiler fly ash of circulating fluidized bed Download PDFInfo
- Publication number
- CN203442806U CN203442806U CN201320546643.7U CN201320546643U CN203442806U CN 203442806 U CN203442806 U CN 203442806U CN 201320546643 U CN201320546643 U CN 201320546643U CN 203442806 U CN203442806 U CN 203442806U
- Authority
- CN
- China
- Prior art keywords
- ash
- boiler
- stokehold
- pipeline
- fly ash
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 239000010881 fly ash Substances 0.000 title claims abstract description 23
- 239000002956 ash Substances 0.000 claims abstract description 66
- 239000000428 dust Substances 0.000 claims abstract description 25
- 238000003860 storage Methods 0.000 claims abstract description 4
- 239000012717 electrostatic precipitator Substances 0.000 claims description 8
- 238000002309 gasification Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000032258 transport Effects 0.000 abstract 3
- 239000003245 coal Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Gasification And Melting Of Waste (AREA)
- Incineration Of Waste (AREA)
Abstract
The utility model provides an afterburning device for boiler fly ash of a circulating fluidized bed. The afterburning device has a simple structure, can effectively reduce the fly ash content and increase the boiler efficiency, and comprises a pre-boiler ash chamber arranged in the front of the boiler, wherein an electric feeding machine is connected with the lower part of the pre-boiler ash chamber, and transports the fly ash to the boiler through a pipeline; the upper part of the pre-boiler ash chamber is communicated with an ash transport pipeline; the other end of the ash transport pipeline is connected with a chamber pump in the back section of the boiler; the chamber pump is connected with an electrostatic dust collector; the side part of the chamber pump is connected with an ash bin through a pneumatic valve; the pre-boiler ash chamber is connected with an air storage tank through a pipeline; the air storage tank is connected with an air compressor plant.
Description
Technical field
The utility model relates to Sector of Cfb Boilers, is specifically related to a kind of CFBB fly ash reinjection system.
Background technology
CFBB is clean with it, feature is promoted efficiently, especially in industrial production type enterprise, apply more, but in operation is used, find that it exists part defect, there is following problem in most of CFBB: 1, burner hearth differential pressure is low, and on-load can be poor; 2, burning low-volatite coal, its running temperature is logical lower than coal-powder boiler, so the burning time of coal particle is relatively long, causes boiler flyash carbon content higher, sometimes even up to more than 20%, thus the efficiency that impact is filtered; 3, material layer temperature, in higher level, generally adopt the method that increases air output, but this can cause pressure fan electric current to increase for reducing bed temperature, and boiler power consumption rises, and even can cause boiler abrasion aggravation when serious.
At present, although worked out the solution of corresponding above-mentioned technical problem, as increase the external heat-exchange system that feed space, Heat Room and heat recirculated water loop etc. form, to reach reduction unburned carbon in flue dust, improve the object of efficiency of combustion, but owing to having introduced external closed circuit, complex structure and take up room greatly, operation and maintenance is all more loaded down with trivial details; The fly ash reburning system of other form need to increase blower fan or use compressed air that ash is sent into burner hearth continuously, and power consumption or air supply are larger, and fly ash carry cost is higher.
Summary of the invention
For above-mentioned technical problem, the utility model provide a kind of simple in structure, can effectively reduce unburned carbon in flue dust, improve the CFBB fly ash reinjection system of boiler efficiency.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of CFBB fly ash reinjection system, comprise the stokehold ash silo that is arranged on boiler front portion, ash silo bottom, stokehold is connected with electric feeder, electric feeder by pipeline by fly ash carry to boiler, ash silo top, stokehold is communicated with ash handing pipeline, the ash handing pipeline other end is connected on the storehouse pump of boiler back segment, described storehouse pump is connected with electrostatic precipitator, storehouse pump side portion is connected to grey storehouse by operated pneumatic valve, in the ash silo of described stokehold, also by pipeline, connect an air accumulator, air accumulator is connected with air compressor plant.
In the ash silo of described stokehold, be provided with pulse dust collector, level-sensing device, pressure vacuum relief valve and feed bin gasification installation, be arranged on pulse dust collector with the tank connected pipe end of gas storage, pulse dust collector can effectively prevent that flying dust from overflowing.
Described stokehold ash silo is provided with 2.
Described storehouse pump is symmetrically arranged with 2 below electrostatic precipitator.
Described stokehold ash silo and storehouse pump are connected outward on both pipeline and are equipped with control valve.
The corresponding stokehold of described electric feeder ash silo is provided with 2, and each electric feeder connects respectively the pipeline of the defeated ash of two road direction boilers.
The beneficial effects of the utility model are according to known to the narration of such scheme:
1) flying dust of boiler back segment is back in stove and again participates in burning after pulse dust collector, can effectively reduce unburned combustible in fly ash, improve boiler efficiency, can improve the recoverable amount of circulating ash in boiler simultaneously, improve burner hearth pressure reduction, thereby greatly strengthen the on-load ability of boiler;
2) Low Temperature Ash through deduster enters after the bed of material, can effectively reduce bed temperature, reduces primary air fan electric current, reduces boiler kwh loss;
3) electric feeder is set and controls entering the ash amount of burner hearth, the ash amount that can guarantee to enter boiler is even, and while preventing from carrying because of strength, the unstable boiler operatiopn causing of ash amount is abnormal;
4) this reburning device, by setting up two stokehold ash silos, stores and loopback the flying dust of carrying in conjunction with the electronic power machine of giving, and without increasing additional energy consumption, cinder reinjection cost is low.
Accompanying drawing explanation
Fig. 1 is the fly ash reinjection system arrangement schematic diagram of the utility model embodiment;
Fig. 2 is the stokehold ash silo structural representation of the utility model embodiment;
Mark in figure: 1, boiler; 2, electrostatic precipitator; 3, control valve; 4, storehouse pump; 5, air compressor plant; 6, air accumulator; 7, electric feeder; 8, stokehold ash silo; 9, pulse dust collector; 10, level-sensing device; 11, pressure vacuum relief valve; 12, feed bin gasification installation.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated:
As accompanying drawing 1, shown in Fig. 2, the CFBB fly ash reinjection system that the present embodiment provides, comprise the stokehold ash silo 8 that is arranged on boiler 1 front portion, ash silo 8 bottoms in stokehold are connected with electric feeder 7, electric feeder 7 by pipeline by fly ash carry to boiler 1, ash silo 8 tops in stokehold are communicated with ash handing pipeline, the ash handing pipeline other end is connected on the storehouse pump 4 of boiler 1 back segment, described storehouse pump 4 is connected with electrostatic precipitator 2, pump 4 sidepieces in storehouse are connected to grey storehouse by operated pneumatic valve, in described stokehold ash silo 8, also by pipeline, connect an air accumulator 6, air accumulator 6 is connected with air compressor plant 5.
In described stokehold ash silo 8, be provided with pulse dust collector 9, level-sensing device 10, pressure vacuum relief valve 11 and feed bin gasification installation 12, the pipe end being connected with air accumulator 6 is arranged on pulse dust collector 9, and pulse dust collector 9 can effectively prevent that flying dust from overflowing.
Described stokehold ash silo 8 is provided with 2.
Described storehouse pump 4 is symmetrically arranged with 2 below electrostatic precipitator 2.
Described stokehold ash silo 8 and storehouse pump 4 be outer to be connected on both pipeline and to be equipped with control valve 3.
The corresponding stokehold of described electric feeder 7 ash silo 8 is provided with 2, and each electric feeder 7 connects respectively the pipeline of two road direction boiler 1 defeated ashes.
During operation, a road ash conveying pipe is installed respectively in storehouse pump 4 outlets of electrostatic precipitator 2 belows, flying dust in one of them storehouse pump 4 directly enters an ash silo by pipeline, the ash conveying pipe of another storehouse pump 4 is divided into two-way on stokehold ash silo 8 tops, by control valve 3, control, enter respectively selectively two stokehold ash silos 8; Two stokehold ash silos 8 are installed on coal feeder floor platform top, for storing the flying dust transporting from storehouse pump 4, to boiler 1 burner hearth feed continuously and stably, each stokehold ash silo 8 top is all installed pulse dust collector 9 and is prevented that flying dust from overflowing, each stokehold ash silo 8 bottom respectively installs an electric feeder 7 additional, electric feeder 7 bottoms are provided with two-way pipeline, access in feeder respectively.
Flying dust in storehouse pump 4, due to compressed-air actuated conveying effect, through ash conveying pipe, enters into two stokehold ash silos 8 on feeder top.The flying dust of collecting in stokehold ash silo 8 is under the distribution of two electric feeders 7, enter equably four road pipelines, under the effect of gravity, enter feeder and drop on the belt of feeder, enter burner hearth together with coal charge, participate in the interior circulation of boiler 1, the combustible in flying dust also can repeatedly participate in burning simultaneously, make burning more abundant, the operation of boiler 1 also more economically.
During normal operation, adjust each control valve 3 positions, make the flying dust in two storehouse pumps 4 enter respectively two stokehold ash silos 8 by conveyance conduit, while needing outwards to carry as ash in an electric field, by wherein a storehouse pump 4 is interior, to each stokehold ash silo 8, supply ash, flying dust is controlled by control valve in stokehold ash silo 83, enters respectively selectively two ash silos, flying dust in another storehouse pump 4 is transported in grey storehouse by conveyance conduit, operates very flexible.
In the above-described embodiments, preferred embodiments of the present utility model is described, obviously, under inventive concept of the present utility model, still can make a lot of variations.At this, should illustrate, any change of making under inventive concept of the present utility model all will fall in protection domain of the present utility model.
Claims (6)
1. a CFBB fly ash reinjection system, it is characterized in that: comprise the stokehold ash silo that is arranged on boiler front portion, ash silo bottom, stokehold is connected with electric feeder, electric feeder by pipeline by fly ash carry to boiler, ash silo top, stokehold is communicated with ash handing pipeline, the ash handing pipeline other end is connected on the storehouse pump of boiler back segment, described storehouse pump is connected with electrostatic precipitator, storehouse pump side portion is connected to grey storehouse by operated pneumatic valve, in the ash silo of described stokehold, also by pipeline, connect an air accumulator, air accumulator is connected with air compressor plant.
2. CFBB fly ash reinjection system according to claim 1, it is characterized in that: in the ash silo of described stokehold, be provided with pulse dust collector, level-sensing device, pressure vacuum relief valve and feed bin gasification installation, be arranged on pulse dust collector with the tank connected pipe end of gas storage.
3. CFBB fly ash reinjection system according to claim 1 and 2, is characterized in that: described stokehold ash silo is provided with 2.
4. CFBB fly ash reinjection system according to claim 1 and 2, is characterized in that: described storehouse pump is symmetrically arranged with 2 below electrostatic precipitator.
5. CFBB fly ash reinjection system according to claim 2, is characterized in that: described stokehold ash silo and storehouse pump are connected outward on both pipeline and are equipped with control valve.
6. CFBB fly ash reinjection system according to claim 3, is characterized in that: the corresponding stokehold of described electric feeder ash silo is provided with 2, and each electric feeder connects respectively the pipeline of the defeated ash of two road direction boilers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320546643.7U CN203442806U (en) | 2013-09-04 | 2013-09-04 | Afterburning device for boiler fly ash of circulating fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320546643.7U CN203442806U (en) | 2013-09-04 | 2013-09-04 | Afterburning device for boiler fly ash of circulating fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203442806U true CN203442806U (en) | 2014-02-19 |
Family
ID=50093858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320546643.7U Expired - Fee Related CN203442806U (en) | 2013-09-04 | 2013-09-04 | Afterburning device for boiler fly ash of circulating fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203442806U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152121A (en) * | 2016-08-12 | 2016-11-23 | 淄博弘科电力设备有限公司 | CFBB fly ash reinjection energy-saving equipment |
| CN109312918A (en) * | 2016-06-08 | 2019-02-05 | 气体技术学院 | Method and apparatus for uniform distribution of solid fuel material |
| CN111878801A (en) * | 2020-08-31 | 2020-11-03 | 北京永博洁净科技有限公司 | Fly ash circulating device and circulating fluidized bed boiler comprising same |
| CN114623440A (en) * | 2022-03-10 | 2022-06-14 | 国家能源集团宁夏煤业有限责任公司 | Circulating ash supply device and circulating fluidized bed boiler system |
-
2013
- 2013-09-04 CN CN201320546643.7U patent/CN203442806U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109312918A (en) * | 2016-06-08 | 2019-02-05 | 气体技术学院 | Method and apparatus for uniform distribution of solid fuel material |
| CN109312918B (en) * | 2016-06-08 | 2020-10-16 | 气体技术学院 | Method and apparatus for uniform distribution of solid fuel material |
| CN106152121A (en) * | 2016-08-12 | 2016-11-23 | 淄博弘科电力设备有限公司 | CFBB fly ash reinjection energy-saving equipment |
| CN111878801A (en) * | 2020-08-31 | 2020-11-03 | 北京永博洁净科技有限公司 | Fly ash circulating device and circulating fluidized bed boiler comprising same |
| CN114623440A (en) * | 2022-03-10 | 2022-06-14 | 国家能源集团宁夏煤业有限责任公司 | Circulating ash supply device and circulating fluidized bed boiler system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203442806U (en) | Afterburning device for boiler fly ash of circulating fluidized bed | |
| CN103542407A (en) | Flying ash recirculating device and flying ash recirculating method for circulating fluidized bed boiler | |
| CN202303358U (en) | CFB (Circulating Fluidized Bed) boiler coal feeding system for co-combustion of middling coals | |
| CN103175198B (en) | CFBB continuous supplementation bed materials device | |
| CN105043051A (en) | System suitable for drying and particle forming of medicine dregs | |
| CN105157022B (en) | A kind of Horizontal CFB Boiler with bed outer circulation | |
| CN218781281U (en) | Fluidized bed boiler system with double ash circulation | |
| CN204777659U (en) | Limestone flour addition system for desulfurization in circulating fluidized bed boiler stove | |
| CN107654997B (en) | Circulating ash control system and method for circulating fluidized bed boiler | |
| CN204962736U (en) | Horizontal circulating fluidized bed boiler of area bed material extrinsic cycle | |
| CN205066339U (en) | System suitable for shaping of dregs of a decoction stoving granule | |
| CN103712226B (en) | It is applied to the circulation pulverized coal preparation system of middle-size and small-size industrial coal powder boiler | |
| CN102350211A (en) | Circulating fluidized bed boiler three-stage desulfurization device | |
| CN212018912U (en) | A fly ash treatment system for garbage power station | |
| CN205897127U (en) | Circulating fluidized bed boiler fly ash energy -saving equipment that recycles | |
| CN109099440B (en) | Uniform distribution system of garbage circulating fluidized bed boiler | |
| CN207527575U (en) | The material-returning device of CFB boiler | |
| CN101270874B (en) | Coal-burning type boiler breeze blowing combustion device | |
| CN204693396U (en) | The energy-conservation low nitrogen combustion apparatus of a kind of fluidised form reconstruct CFB boiler resume combustion | |
| CN203249238U (en) | Continuous bed material supplement device of circulating fluidized bed boiler | |
| CN204777658U (en) | Economizer ash conveying system | |
| CN207729583U (en) | A kind of circulating fluidized bed boiler cycle ash handing system | |
| CN203309894U (en) | Fly-ash reburning energy-saving device for circulating fluidized bed boiler | |
| CN202297342U (en) | Sludge drying device for circulating fluidized bed boiler | |
| CN115451401B (en) | A sorting type biomass-fired circulating fluidized bed boiler feeding system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |