CN1789814A - Method and apparatus for removing viscous ash deposit in boiler - Google Patents
Method and apparatus for removing viscous ash deposit in boiler Download PDFInfo
- Publication number
- CN1789814A CN1789814A CN 200410098920 CN200410098920A CN1789814A CN 1789814 A CN1789814 A CN 1789814A CN 200410098920 CN200410098920 CN 200410098920 CN 200410098920 A CN200410098920 A CN 200410098920A CN 1789814 A CN1789814 A CN 1789814A
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- particle
- boiler
- fluidising chamber
- flue
- dust
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Abstract
This invention relates to one method and device to remove adhesive dust in oven, wherein the method comprises the following steps: Joining the particles from oven tail smoke channel or remaining oven top along with smoke to tube beam to take off its surface dust; depositing the dust and particles one the smoke channel bottom to enter flow bed filtering device; the air outside smoke channel entering flow chamber to flow the particle and dust from flow chamber top to smoke channel back section; the particle are sent to the feed back device through the flow chamber bottom discharge screw through gas force transmission system or lift machine to send to materials bin; if the particle and dust are severely stuck, then from bin screw to re-fill particle from the side exhaust system by the bin.
Description
Technical field
The present invention relates to a kind of method and device thereof of boiler soot-blowing, specifically relate to a kind of method and apparatus that uses particle to remove viscous ash deposit in the boiler back end ductwork.
Background technology
Usually, on the back-end surfaces of boiler or pipe type exhaust heat boiler tube bundle, have dust stratification.These dust stratifications can influence the heat exchange effect of boiler, reduce the efficient of boiler, therefore, when boiler operatiopn, need intermittently or continuous removing back-end surfaces and the dust stratification on the heat-exchanging tube bundle.
Process for deashing commonly used at present mainly contains sonic soot blowing, steam soot blowing and pulsed and blows ash etc.Yet, for the boiler of incinerator, biological substance for combustion, and CFB boiler, because alkali metal content is higher in the dust stratification, dust stratification is easy to be bonded on back-end surfaces or the pipe type exhaust heat boiler, adopts said method to be difficult to remove.
In order to remove above-mentioned viscous ash deposit, in application number is 98120072.9 patent, disclose and used steel ball to blow gray technology to remove in the oil burning boiler back-end ductwork or the viscous ash deposit in the boiler of biological substance for combustion.But the rapping that this method is to use the self gravitation of steel ball to fall is used for removing dust stratification, and it is very undesirable to remove effect for the bigger dust stratification of viscosity; Simultaneously, just may bond agglomeratingly with steel ball when dust stratification viscosity is very big, separation difficulty makes steel ball can only do disposable use, has increased the expense of ash disposal greatly.
Summary of the invention
When the objective of the invention is to overcome prior art and removing viscous ash deposit, it is bad to remove effect, and the steel ball of use easily bonds with viscous ash deposit, and the ash disposal defect of high cost, thereby a kind of method that can efficient, easy removing viscous ash deposit in boiler is provided.
The present invention also aims to provide a kind of isolated plant of said method.
The objective of the invention is to realize by the following technical solutions:
The invention provides a kind of method of removing viscous ash deposit in boiler, it washes away tube bank for using from the particle of boiler back end ductwork or the adding of pipe type exhaust heat boiler top under the carrying of flue gas, take away the dust stratification on tube bank surface, concrete steps comprise: at boiler back end ductwork or pipe type exhaust heat boiler top a plurality of particles are set and add inlet, with the particle diameter in the hopper is particle (the river sand of 0.5～10mm, quartz sand and alumina particle) control by particle addition control device, it is reinforced to add inlet through particle, enter heated surface at the end of boiler or pipe type exhaust heat boiler, under the carrying of flue gas, wash away tube bank, take away the dust stratification on tube bank surface; Under particle deposits bottom flue, when flue gas turns to ash, enter the fluid bed separation device, because in the flue is negative pressure, the outer fluidized wind inlet of air bottom fluidising chamber of flue enters fluidising chamber, make particle and grey fluidisation, ash is got back to the flue back segment with fluidization air from the fluidising chamber top, and particle is then sent into the particle loop back device by the load displacing screw dispenser of fluidising chamber bottom, sends hopper back to by air-transport system or elevator and recycles; If particle is serious with the ash bonding, then, add new particle in the hopper again from the bypass outlet discharge system in load displacing screw batcher exit.
But the kind of the particle that is adopted and granularity based on fuel kind are selected.Big for grey viscosity, be easy to the fuel with the particle bonding, the ash disposal expense that adopts low-cost river sand when adopting quartz sand and alumina particle is cheaper; Less for grey viscosity, the difficult fuel that bonds with particle then can adopt higher quartz sand of price or alumina particle as removing grey particle, to obtain better dedusting effect.
This method can adopt intermittently or ash disposal continuously according to the dust stratification order of severity.
The invention provides a kind of particle ash handling equipment of implementing said method, comprise that hopper 1, particle addition control device 11, particle add inlet 2, fluid bed separation device and particle loop back device; Hopper is positioned at boiler back end ductwork 5 or pipe type exhaust heat boiler top, adds inlet through particle addition control device and a plurality of particles at boiler back end ductwork or pipe type exhaust heat boiler top and links to each other; The fluid bed separation device is positioned at flue or waste heat boiler bottom, comprise reinforced screw(-type) feeder 31, fluidising chamber 32 and load displacing screw batcher 34, reinforced screw(-type) feeder links to each other with the charging aperture of fluidising chamber, and the load displacing screw batcher links to each other with the fluidising chamber outlet at bottom, and the fluidising chamber top communicates with flue; The outlet of load displacing screw batcher links to each other with the particle loop back device, also has way outlet 35 on one side simultaneously; 4 outlets of particle loop back device link to each other with hopper.Described particle loop back device can be an elevator, also can be air-transport system.
Method and apparatus provided by the invention can be used for the remove rubbish boiler of incinerator, biological substance for combustion, the back-end surfaces of CFBB and the viscous ash deposit in the pipe type exhaust heat boiler.
Compared with prior art, advantage of the present invention is:
1, the particle that utilizes multiple spot to add evenly washes away tube bank with flue gas, takes away the viscous ash deposit in the tube bank, and is more effective than the rapping of steel ball, can efficiently remove the tube wall viscous ash deposit;
2, this method simple and flexible can be according to dust stratification order of severity decision intermittence or continuous dust dislodging;
3, the particle of its use can recycle, if dust stratification and particle bonding are serious, when particle is difficult to reclaim, also can not reclaim particle, directly add the new particle ash disposal,, but compare with disposable steel ball though this can make the ash disposal expense increase, cost as river sand, quartz sand and the alumina particle of particle is still very cheap, thereby is a kind of low cost method;
Description of drawings
Fig. 1 is a device schematic diagram of the present invention.
Wherein:
Hopper 1 particle addition control device 11 particles add inlet 2
Reinforced screw(-type) feeder 31 fluidising chamber 32 fluidized winds inlet 33
34 bypasses of load displacing screw batcher export 35 particle loop back devices 4
Back-end ductwork 5 tube banks 51
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
Embodiment 1,
One CFBB, back-end ductwork 5 tops have 8 particles and add inlet 2, all link to each other with hopper 1 through particle addition control device 11; Particle with sweep of gases tube bank 51, is taken away dust stratification in the tube bank 51 after adding inlet 2 adding back-end ductworks 5 from particle; Particle and ash are in back-end ductwork 5 bottom deposits, send into fluidising chamber 32 by reinforced screw(-type) feeder 31, air enters fluidising chamber 32 from the fluidized wind inlet 33 of fluidising chamber 32 bottoms, the dust stratification fluidisation that particle and washing away is got off, ash is littler, enters the back-end ductwork back segment with fluidization air from the fluidising chamber top, particle is discharged from the fluidising chamber bottom, send into particle loop back device 4 through load displacing screw batcher 34, particle loop back device 4 adopts pneumatic conveying mode, and particle is recycled to hopper 1.Particle is selected the quartz sand of particle diameter 2～5mm for use.Ash disposal system is moved continuously.
Embodiment 2,
The boiler of one biological substance for combustion, back-end ductwork 5 tops have 4 particles and add inlet, all link to each other with hopper 1 through particle addition control device 11; Particle with sweep of gases tube bank 51, is taken away dust stratification in the tube bank 51 after adding inlet 2 adding back-end ductworks from particle; Particle and ash are in the flue bottom deposit, send into fluidising chamber 32 by reinforced screw(-type) feeder 31, because tar content is higher in the ash that the living beings burning produces, particle and dust stratification bonding, bypass outlet 35 by load displacing screw batcher 34 exits is discharged, and does not send into particle sorting unit and 4 loopbacks of particle loop back device; Need to add new particle in the hopper 1.Particle is selected the river sand of particle diameter 0.5～4mm for use.The ash disposal system intermittent duty.
Embodiment 3,
One incinerator, its pipe type exhaust heat boiler top have 2 particles and add inlet 2, all link to each other with hopper 1 through particle addition control device 11; Particle with sweep of gases tube bank 51, is taken away dust stratification in the tube bank 51 after adding inlet 2 adding back-end ductworks from particle; Particle and ash are in the flue bottom deposit, send into fluidising chamber 32 by reinforced screw(-type) feeder 31, air enters fluidising chamber 32 from the fluidized wind inlet 33 of fluidising chamber bottom, the dust stratification fluidisation that particle and washing away is got off, ash is littler, enters the back-end ductwork back segment with fluidization air from the fluidising chamber top, particle is discharged from the fluidising chamber bottom, send into particle loop back device 4 through load displacing screw batcher 34, particle loop back device 4 adopts elevator, and particle is recycled to hopper 1.Particle is selected the alumina particle of particle diameter 5～10mm for use.Ash disposal system is moved continuously.
Claims (6)
1, a kind of method of removing viscous ash deposit in boiler, it is for removing dust stratification by adding particle with the sweep of gases tube bank, concrete steps comprise: particle is added from boiler back end ductwork or pipe type exhaust heat boiler top multiple spot, with the sweep of gases tube bank, take away the dust stratification on tube bank surface; Under particle and dust stratification deposit bottom flue, when flue gas turns to, enter the fluid bed separation device, the outer fluidized wind inlet of air bottom fluidising chamber of flue enters fluidising chamber, make particle and grey fluidisation, ash is got back to the flue back segment with fluidization air from the fluidising chamber top, particle is then sent into the particle loop back device by the load displacing screw dispenser of fluidising chamber bottom, sends hopper back to and recycles.
2, the method for removing viscous ash deposit in boiler as claimed in claim 1 is characterized in that described particle is river sand, quartz sand and alumina particle.
3, the method for removing viscous ash deposit in boiler as claimed in claim 1 or 2, the particle diameter that it is characterized in that described particle is 0.5～10mm.
4, the method for removing viscous ash deposit in boiler as claimed in claim 1 is characterized in that this method can adopt intermittently or ash disposal continuously according to the dust stratification order of severity.
5, a kind of device of removing viscous ash deposit in boiler comprises that hopper, particle addition control device, particle add inlet, fluid bed separation device and particle loop back device; Hopper is positioned at boiler back end ductwork or pipe type exhaust heat boiler top, adds inlet through particle addition control device and a plurality of particles at boiler back end ductwork or pipe type exhaust heat boiler top and links to each other; The fluid bed separation device is positioned at flue or waste heat boiler bottom, comprise reinforced screw(-type) feeder, fluidising chamber and load displacing screw batcher, reinforced screw(-type) feeder links to each other with the charging aperture of fluidising chamber, and the load displacing screw batcher links to each other with the fluidising chamber outlet at bottom, and the fluidising chamber top communicates with flue; The outlet of load displacing screw batcher links to each other with the particle loop back device, also has way outlet on one side simultaneously; The outlet of particle loop back device links to each other with hopper.
6, the device of removing viscous ash deposit in boiler as claimed in claim 5 is characterized in that described particle loop back device is an elevator, or air-transport system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100989208A CN100404956C (en) | 2004-12-15 | 2004-12-15 | Method and apparatus for removing viscous ash deposit in boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100989208A CN100404956C (en) | 2004-12-15 | 2004-12-15 | Method and apparatus for removing viscous ash deposit in boiler |
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| Publication Number | Publication Date |
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| CN1789814A true CN1789814A (en) | 2006-06-21 |
| CN100404956C CN100404956C (en) | 2008-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100989208A Expired - Fee Related CN100404956C (en) | 2004-12-15 | 2004-12-15 | Method and apparatus for removing viscous ash deposit in boiler |
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| CN (1) | CN100404956C (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113816B (en) * | 2006-07-27 | 2010-05-12 | 中国科学院工程热物理研究所 | Biomass circulating fluid bed burning method and biomass circulating fluid bed boiler |
| CN102313288A (en) * | 2011-07-26 | 2012-01-11 | 北京交通大学 | Dust deposition removing method and system |
| CN102506439A (en) * | 2011-09-30 | 2012-06-20 | 智胜化工股份有限公司 | Method for blowing soot for waste heat boiler by using waste |
| CN103062782A (en) * | 2013-01-09 | 2013-04-24 | 北京世纪源博科技股份有限公司 | Dust cleaning system applicable to heat recovery boiler with complex heating surface |
| CN103244959A (en) * | 2013-04-27 | 2013-08-14 | 江苏太湖锅炉股份有限公司 | Secondary uniform steel ball distribution structure |
| CN103471094A (en) * | 2013-09-10 | 2013-12-25 | 鞍山锅炉厂有限公司 | Device for blowing tail heating surface of circulating fluidized bed boiler by utilizing high-temperature cyclone separator |
| CN103615714A (en) * | 2013-11-20 | 2014-03-05 | 东方电气集团东方锅炉股份有限公司 | Method and system for preventing boiler heating surface from being contaminated through circulation of wearable materials |
| CN104399717A (en) * | 2014-10-17 | 2015-03-11 | 金川集团股份有限公司 | Flue dirt removing device and flue dirt removing method |
| CN105570913A (en) * | 2016-02-25 | 2016-05-11 | 四川省宜宾惠美线业有限责任公司 | Circulating sand dust blowing device |
| CN105588119A (en) * | 2016-02-25 | 2016-05-18 | 四川省宜宾惠美线业有限责任公司 | Energy-saved circulating fluidized bed boiler |
| CN105737143A (en) * | 2016-02-25 | 2016-07-06 | 四川省宜宾惠美线业有限责任公司 | Circular ash removing method suitable for fluidized bed boiler |
| CN105737144A (en) * | 2016-02-25 | 2016-07-06 | 四川省宜宾惠美线业有限责任公司 | Ash removal method suitable for fluidized bed boiler |
| CN106196115A (en) * | 2016-09-09 | 2016-12-07 | 西安交通大学 | A kind of controlled erosion system and method for cleaning boiler heating surface |
| CN106287766A (en) * | 2016-08-02 | 2017-01-04 | 亿川科技(成都)有限责任公司 | A kind of online scavenging system of flue black dirt and technique thereof |
| CN112742119A (en) * | 2021-01-09 | 2021-05-04 | 武汉轻工大学 | Online circulating cleaning system and method for catalytic triple-rotation single tube |
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| CN102494345A (en) * | 2011-12-26 | 2012-06-13 | 无锡东马锅炉有限公司 | High-efficiency waste liquid combustion boiler |
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| JPS58217112A (en) * | 1982-06-11 | 1983-12-17 | Nippon Kokan Kk <Nkk> | Soot removing method of waste heat collecting boiler in cement plant |
| CN1010797B (en) * | 1988-05-16 | 1990-12-12 | 北京燕山石油化工公司炼油厂 | Steel ball ash remover for boiler |
| CN1213758A (en) * | 1998-10-06 | 1999-04-14 | 曹新华 | Boiler steel balls ash blowing device |
| JP2002257320A (en) * | 2001-02-28 | 2002-09-11 | Abe Ganaito Kogyo:Kk | Work method for removing soot adhering to wall face of burner, incinerator, or chimney |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113816B (en) * | 2006-07-27 | 2010-05-12 | 中国科学院工程热物理研究所 | Biomass circulating fluid bed burning method and biomass circulating fluid bed boiler |
| CN102313288A (en) * | 2011-07-26 | 2012-01-11 | 北京交通大学 | Dust deposition removing method and system |
| CN102506439B (en) * | 2011-09-30 | 2013-08-21 | 智胜化工股份有限公司 | Method for blowing soot for waste heat boiler by using waste |
| CN102506439A (en) * | 2011-09-30 | 2012-06-20 | 智胜化工股份有限公司 | Method for blowing soot for waste heat boiler by using waste |
| CN103062782B (en) * | 2013-01-09 | 2016-04-06 | 北京世纪源博科技股份有限公司 | One is suitable for complicated heating surface waste heat boiler soot cleaning system |
| CN103062782A (en) * | 2013-01-09 | 2013-04-24 | 北京世纪源博科技股份有限公司 | Dust cleaning system applicable to heat recovery boiler with complex heating surface |
| CN103244959A (en) * | 2013-04-27 | 2013-08-14 | 江苏太湖锅炉股份有限公司 | Secondary uniform steel ball distribution structure |
| CN103471094A (en) * | 2013-09-10 | 2013-12-25 | 鞍山锅炉厂有限公司 | Device for blowing tail heating surface of circulating fluidized bed boiler by utilizing high-temperature cyclone separator |
| CN103471094B (en) * | 2013-09-10 | 2015-08-12 | 鞍山锅炉厂有限公司 | CFBB utilizes high temperature cyclone separator to purge back-end surfaces device |
| CN103615714A (en) * | 2013-11-20 | 2014-03-05 | 东方电气集团东方锅炉股份有限公司 | Method and system for preventing boiler heating surface from being contaminated through circulation of wearable materials |
| CN103615714B (en) * | 2013-11-20 | 2016-09-21 | 东方电气集团东方锅炉股份有限公司 | A kind of method and system using abrasion-proof materiel circulation to prevent boiler heating surface from staiing |
| CN104399717A (en) * | 2014-10-17 | 2015-03-11 | 金川集团股份有限公司 | Flue dirt removing device and flue dirt removing method |
| CN105737143A (en) * | 2016-02-25 | 2016-07-06 | 四川省宜宾惠美线业有限责任公司 | Circular ash removing method suitable for fluidized bed boiler |
| CN105588119A (en) * | 2016-02-25 | 2016-05-18 | 四川省宜宾惠美线业有限责任公司 | Energy-saved circulating fluidized bed boiler |
| CN105737144A (en) * | 2016-02-25 | 2016-07-06 | 四川省宜宾惠美线业有限责任公司 | Ash removal method suitable for fluidized bed boiler |
| CN105570913A (en) * | 2016-02-25 | 2016-05-11 | 四川省宜宾惠美线业有限责任公司 | Circulating sand dust blowing device |
| CN105737144B (en) * | 2016-02-25 | 2018-01-05 | 四川省宜宾惠美线业有限责任公司 | A kind of process for deashing suitable for fluidized-bed combustion boiler |
| CN105737143B (en) * | 2016-02-25 | 2018-01-05 | 四川省宜宾惠美线业有限责任公司 | A kind of circulation process for deashing suitable for fluidized-bed combustion boiler |
| CN106287766A (en) * | 2016-08-02 | 2017-01-04 | 亿川科技(成都)有限责任公司 | A kind of online scavenging system of flue black dirt and technique thereof |
| CN106196115A (en) * | 2016-09-09 | 2016-12-07 | 西安交通大学 | A kind of controlled erosion system and method for cleaning boiler heating surface |
| CN112742119A (en) * | 2021-01-09 | 2021-05-04 | 武汉轻工大学 | Online circulating cleaning system and method for catalytic triple-rotation single tube |
| CN112742119B (en) * | 2021-01-09 | 2022-04-12 | 武汉轻工大学 | Online circulating cleaning system and method for catalytic triple-rotation single tube |
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| CN100404956C (en) | 2008-07-23 |
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