CN102980181A - Circulating fluidized bed boiler fly ash recirculation device - Google Patents
Circulating fluidized bed boiler fly ash recirculation device Download PDFInfo
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- CN102980181A CN102980181A CN2012104408222A CN201210440822A CN102980181A CN 102980181 A CN102980181 A CN 102980181A CN 2012104408222 A CN2012104408222 A CN 2012104408222A CN 201210440822 A CN201210440822 A CN 201210440822A CN 102980181 A CN102980181 A CN 102980181A
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- flying dust
- fly ash
- air inlet
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- surge bunker
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Abstract
The present invention provides a circulating fluidized bed boiler fly ash recirculation device, including a manual thin gate valve arranged at a fly ash bin down direction. The underneath of the manual thin gate valve is in turn connected with an expansion joint, an upper rotation feed valve, a surge bin, a lower rotation feed valve, and an ejector. The outlet of the ejector is in turn connected with a material feeding pipe, an expansion joint, and a furnace inlet shut-off gate. The air inlet of the ejector is connected with a gas inlet pipe. The recirculation device transports the high carbon content fly ash from a fly ash bin to a boiler furnace for continues burning, and reduces the carbon content of fly ash. The fly ash with a reduced content of carbon can be used as a building material, and can partially replace cement or is used for manufacturing cement. The fly ash utilization is improved; and the environment is protected.
Description
Technical field
The present invention relates to a kind of Pneumatic conveying device for powdery material, be more particularly to a kind of CFBB flying dust EGR.
Background technology
Coal for circulation fluid bed boiler kind wide adaptability, but for the CFBB that designs moulding, just can reach higher efficiency of combustion during the specific coal of can only burning.Because the impact of the architectural characteristic of coal, volatile content, caloric value, moisture, ash, the efficiency of combustion of CFBB has very big difference.
Circulating fluidized bed technique has become very potential a kind of clean coal technology owing to its coal adaptability with in advantages such as low-cost pollutant emission controls.It is generally acknowledged that CFBB has very high efficiency of combustion, but in China, the actual unburned carbon in flue dust of the CFBB of many burning hard coals such as bituminous coal and anthracite and discarded object etc. is very high, substantially exceeds prediction and design load.
High unburned carbon in flue dust is so that the market competitiveness decline of CFBB.
Boiler fly ash can be used as construction material, part place of cement or for the manufacture of cement, this is the application of the tool economic worth of flying dust.Unburned carbon in flue dust is too high will to limit it in the application of cement and building trade.
The flying dust that phosphorus content is very high once was used as fuel and came brickmaking.But this seasonal brick production can only partly digest the high carbon containing flying dust of discharging continuously from CFBB, and in recent years brick production is reduced rapidly and the new building materials of quilt substitute.On the other hand, flying dust landfill cost is also in upper length.Therefore the best approach of cycle for the treatment of CFB fly ash is to reduce phosphorus content, so that building and cement industry can be accepted. but the phosphorus content that how to reduce flying dust just becomes a great problem.
Summary of the invention
The objective of the invention is to overcome above deficiency, a kind of CFBB flying dust EGR is provided, it can reduce the phosphorus content of flying dust.
A kind of CFBB flying dust EGR, comprise be arranged under the flying dust storehouse to manual Thin Gate Valves, be connected to successively telescopic joint, upper rotatory feeder valve, surge bunker, lower rotatory feeder valve, injector below the described manual Thin Gate Valves, the discharging opening of injector is connected to material conveying pipeline, expansion joint, burner hearth entrance shutoff door successively, and the air inlet of injector is connected to air inlet pipe.
Above-mentioned CFBB flying dust EGR wherein, connects roots blower on the described air inlet pipe.
Above-mentioned CFBB flying dust EGR, wherein, described air inlet pipe is provided with pressure transmitter, and described air inlet pipe is provided with blows block apparatus.
Above-mentioned CFBB flying dust EGR, wherein, be provided with first Pneumatic balanced valve between described surge bunker and the lower rotatory feeder valve, surge bunker is communicated with lower rotatory feeder valve by first Pneumatic balanced valve, be provided with second Pneumatic balanced valve between surge bunker and flying dust storehouse, surge bunker is communicated with the flying dust storehouse by second Pneumatic balanced valve.
The invention has the beneficial effects as follows:
The present invention can phosphorus content is high flying dust be delivered in the boiler furnace from the flying dust storehouse and burn away, reduce unburned carbon in flue dust, the flying dust that reduces after the phosphorus content can be used as construction material, part place of cement or for the manufacture of cement just improves the utilization rate of flying dust; Protection of the environment.
Description of drawings
Fig. 1 is structural representation of the present invention.
The specific embodiment
The present invention is described in detail below in conjunction with accompanying drawing.
A kind of CFBB flying dust EGR, comprise be arranged on flying dust storehouse 1 time to manual Thin Gate Valves 2, be connected to successively telescopic joint 3, upper rotatory feeder valve 4, surge bunker 5, lower rotatory feeder valve 6, injector 7 below the described manual Thin Gate Valves 2, the discharging opening of injector 7 is connected to material conveying pipeline 8, expansion joint 9, burner hearth entrance shutoff door 10 successively, and the air inlet of injector 7 is connected to air inlet pipe 11.Described air inlet pipe 11 connects roots blower.Be provided with pressure transmitter 12 in described air inlet pipe 11, be provided with in described air inlet pipe 11 and blow block apparatus 13.Between surge bunker 5 and lower rotatory feeder valve 6, be provided with first Pneumatic balanced valve, surge bunker 5 is communicated with lower rotatory feeder valve 6 by first Pneumatic balanced valve, be provided with second Pneumatic balanced valve between surge bunker 5 and flying dust storehouse 1, surge bunker 5 is communicated with flying dust storehouse 1 by second Pneumatic balanced valve.
Strength of the present invention carries the flying dust flow process to be:
At first detect all valves before a, the present invention move and whether be in closed condition, instrument with bleed pressure whether in the scope that requires.When all conditions satisfies, open the upper rotatory feeder valve 4 of manual Thin Gate Valves 2 and surge bunker 5 imports, the flying dust that the flying dust storehouse is 1 li begins to enter 5 li of surge bunkers through manual Thin Gate Valves 2, telescopic joint 3, upper rotatory feeder valve 4.After time-delay a period of time, open again lower rotatory feeder valve 6, burner hearth entrance shutoff door 10, the flying dust that surge bunker is 5 li enters 7 li of injectors by lower rotatory feeder valve 6, gas enters in the injector 7 by the air inlet of air inlet pipe 11 and injector 7, flying dust mixes with gas in injector 7, and grey gas mixture enters material conveying pipeline 8 again; Strength makes flying dust enter boiler furnace through material conveying pipeline 8, expansion joint 9, burner hearth entrance shutoff door 10, and burn, just can reduce unburned carbon in flue dust, the flying dust after the reduction phosphorus content can be used as construction material, part place of cement or for the manufacture of cement just improves the utilization rate of flying dust; Protection of the environment.
B, when the setting value of pressure overpressure transmitter 12 of the present invention, blow block apparatus 13 and open, blow stifledly, when pressure of the present invention returns to normal value, close and blow block apparatus 13.
Because: manually Thin Gate Valves 2 is connected with upper rotatory feeder valve 4 by telescopic joint 3; Thereby: telescopic joint 3 can be avoided being rigidly connected of manual Thin Gate Valves 2 and upper rotatory feeder valve 4.
Because: between surge bunker 5 and lower rotatory feeder valve 6, be provided with first Pneumatic balanced valve, surge bunker 5 is communicated with lower rotatory feeder valve 6 by first Pneumatic balanced valve, be provided with second Pneumatic balanced valve between surge bunker 5 and flying dust storehouse 1, surge bunker 5 is communicated with flying dust storehouse 1 by second Pneumatic balanced valve; Thereby can balance pressure reduction.
In sum, the present invention can phosphorus content is high flying dust be delivered in the boiler furnace from flying dust storehouse 1 and burn away, reduce unburned carbon in flue dust, the flying dust that reduces after the phosphorus content can be used as construction material, part place of cement or for the manufacture of cement just improves the utilization rate of flying dust; Protection of the environment.
Claims (4)
1. CFBB flying dust EGR, it is characterized in that, comprise be arranged under the flying dust storehouse to manual Thin Gate Valves, be connected to successively telescopic joint, upper rotatory feeder valve, surge bunker, lower rotatory feeder valve, injector below the described manual Thin Gate Valves, the discharging opening of injector is connected to material conveying pipeline, expansion joint, burner hearth entrance shutoff door successively, and the air inlet of injector is connected to air inlet pipe.
2. CFBB flying dust EGR as claimed in claim 1 is characterized in that, connects roots blower on the described air inlet pipe.
3. CFBB flying dust EGR as claimed in claim 1 is characterized in that described air inlet pipe is provided with pressure transmitter, and described air inlet pipe is provided with blows block apparatus.
4. such as claim 1,2,3 or 4 described CFBB flying dust EGRs, it is characterized in that, be provided with first Pneumatic balanced valve between described surge bunker and the lower rotatory feeder valve, surge bunker is communicated with lower rotatory feeder valve by first Pneumatic balanced valve, be provided with second Pneumatic balanced valve between surge bunker and flying dust storehouse, surge bunker is communicated with the flying dust storehouse by second Pneumatic balanced valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104408222A CN102980181A (en) | 2012-11-06 | 2012-11-06 | Circulating fluidized bed boiler fly ash recirculation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104408222A CN102980181A (en) | 2012-11-06 | 2012-11-06 | Circulating fluidized bed boiler fly ash recirculation device |
Publications (1)
| Publication Number | Publication Date |
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| CN102980181A true CN102980181A (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012104408222A Pending CN102980181A (en) | 2012-11-06 | 2012-11-06 | Circulating fluidized bed boiler fly ash recirculation device |
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| CN (1) | CN102980181A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104528386A (en) * | 2014-12-03 | 2015-04-22 | 镇江市电站辅机厂有限公司 | Pneumatic conveying system of fly ash of dust collector |
| CN105858270A (en) * | 2016-06-03 | 2016-08-17 | 镇江京华电力环保工程公司 | Pneumatic shipping system for wharf fly ash |
| CN110566977A (en) * | 2019-09-06 | 2019-12-13 | 西安交通大学 | Uniform and continuous feeding device for waste incineration fly ash particles |
| CN110959090A (en) * | 2017-08-25 | 2020-04-03 | 三菱日立电力系统株式会社 | Fuel supply piping structure, fuel pulverization supply system having the same, and method for operating fuel supply piping structure |
| 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 |
| CN112747311A (en) * | 2020-12-31 | 2021-05-04 | 江苏久晟环保设备有限公司 | Automatic cooling system of fly ash recycling boiler |
| CN114234178A (en) * | 2021-11-02 | 2022-03-25 | 平湖弘欣热电有限公司 | Fly ash recirculation system of fluidized bed boiler |
Citations (6)
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|---|---|---|---|---|
| US4217834A (en) * | 1977-05-02 | 1980-08-19 | Flameless Furnaces Ltd. | Removal of ash from fluidized beds |
| CN200972107Y (en) * | 2006-11-02 | 2007-11-07 | 张佃明 | Powdered coal recombustion device for circulation fluid-bed |
| CN201218498Y (en) * | 2008-04-18 | 2009-04-08 | 上海美亚金桥能源有限公司 | Flying ash circulating combustion system for circulating fluidized bed boiler |
| CN201475988U (en) * | 2009-06-24 | 2010-05-19 | 厦门银鹭重工有限公司 | Fly ash recirculation device |
| CN201545512U (en) * | 2009-06-10 | 2010-08-11 | 陈毅 | Limestone continuous conveying system |
| CN202902266U (en) * | 2012-11-06 | 2013-04-24 | 镇江市电站辅机厂有限公司 | Fly ash recirculation device of circulating fluidized bed boiler |
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2012
- 2012-11-06 CN CN2012104408222A patent/CN102980181A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4217834A (en) * | 1977-05-02 | 1980-08-19 | Flameless Furnaces Ltd. | Removal of ash from fluidized beds |
| CN200972107Y (en) * | 2006-11-02 | 2007-11-07 | 张佃明 | Powdered coal recombustion device for circulation fluid-bed |
| CN201218498Y (en) * | 2008-04-18 | 2009-04-08 | 上海美亚金桥能源有限公司 | Flying ash circulating combustion system for circulating fluidized bed boiler |
| CN201545512U (en) * | 2009-06-10 | 2010-08-11 | 陈毅 | Limestone continuous conveying system |
| CN201475988U (en) * | 2009-06-24 | 2010-05-19 | 厦门银鹭重工有限公司 | Fly ash recirculation device |
| CN202902266U (en) * | 2012-11-06 | 2013-04-24 | 镇江市电站辅机厂有限公司 | Fly ash recirculation device of circulating fluidized bed boiler |
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| 柴滨林: "飞灰再循环燃烧系统再燃用无烟煤循环流化床锅炉中的应用", 《应用能源技术》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104528386A (en) * | 2014-12-03 | 2015-04-22 | 镇江市电站辅机厂有限公司 | Pneumatic conveying system of fly ash of dust collector |
| CN105858270A (en) * | 2016-06-03 | 2016-08-17 | 镇江京华电力环保工程公司 | Pneumatic shipping system for wharf fly ash |
| CN110959090A (en) * | 2017-08-25 | 2020-04-03 | 三菱日立电力系统株式会社 | Fuel supply piping structure, fuel pulverization supply system having the same, and method for operating fuel supply piping structure |
| CN110566977A (en) * | 2019-09-06 | 2019-12-13 | 西安交通大学 | Uniform and continuous feeding device for waste incineration fly ash particles |
| CN110566977B (en) * | 2019-09-06 | 2020-05-26 | 西安交通大学 | Uniform and continuous feeding device for waste incineration fly ash particles |
| 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 |
| CN112747311A (en) * | 2020-12-31 | 2021-05-04 | 江苏久晟环保设备有限公司 | Automatic cooling system of fly ash recycling boiler |
| CN114234178A (en) * | 2021-11-02 | 2022-03-25 | 平湖弘欣热电有限公司 | Fly ash recirculation system of fluidized bed boiler |
| CN114234178B (en) * | 2021-11-02 | 2022-07-12 | 平湖弘欣热电有限公司 | Fly ash recirculation system of fluidized bed boiler |
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Application publication date: 20130320 |