CN102798120A - Combustion and smoke and dust removal method of small boiler combusting soft coal II and III - Google Patents
Combustion and smoke and dust removal method of small boiler combusting soft coal II and III Download PDFInfo
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- CN102798120A CN102798120A CN2012102776075A CN201210277607A CN102798120A CN 102798120 A CN102798120 A CN 102798120A CN 2012102776075 A CN2012102776075 A CN 2012102776075A CN 201210277607 A CN201210277607 A CN 201210277607A CN 102798120 A CN102798120 A CN 102798120A
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- 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
Abstract
The invention discloses a combustion and smoke and dust removal method of small boiler combusting soft coal II and III. The method comprises the following steps of: (1) combustion and smoke removal: in combustion work of a boiler, primary air enters a fire grate so as to combust coal in a hearth, fume generated in the combustion process in the hearth is blocked by a furnace arch arranged at the back of the hearth and negative pressure is formed at the same time; secondary air is opened automatically to feed air in the furnace arch so as to form an oxygen-enriched region at a furnace arch port, and smoke dust is combusted fully again at the furnace arch port; and (2) dust removal: the fume after combustion and smoke removal enters a first heat exchange region of the boiler to carry out heat exchange and sequentially enters a plurality of rows of vertical fume pipes in a second heat transfer region, wherein the fume enters a first vertical fume pipe from top to bottom, enters a second vertical fume pipe from bottom to top, enters a third vertical fume pipe top to bottom and so on, and dust of the fume in a circulation process falls into a dust cleaning opening. By the method provided by the invention, the small boil can achieve the effects of high-efficiency combustion and cleaning discharge when combusting soft coal II and III, and the heat efficiency of the boiler is improved.
Description
Technical field
The invention belongs to field of boilers, be specifically related to the method for a kind of miniature boiler burning II, the smoke abatement and dust control of III class bituminous coal combustion.
Background technology
Coal-fired miniature boiler is very extensive in worker, farming production and daily life.But make a general survey of existing coal-fired miniature boiler burning anthracite or burning II, III class bituminous coal.As far as the burning anthracite, although its discharging can reach environmental requirement, the anthracite price is high, and the shortcoming that the boiler operatiopn expense is high is very obvious.The relative combustion anthracite, burning II, III class bituminous coal have economical and practical advantage, but its over-emitting black exhaust, soot emissions shortcoming not up to standard is outstanding equally.
Summary of the invention
The objective of the invention is to; The method of a kind of miniature boiler burning II, the smoke abatement and dust control of III class bituminous coal combustion is provided; Existing problem when adopting this method can solve small scall coal-fired boiler burning II, III class bituminous coal is fully accomplished cleaning, environment protection emission, and can be improved the thermal efficiency of boiler.
In order to realize the present invention, the technical scheme that a kind of miniature boiler burning of the present invention II, the method for I I I class bituminous coal combustion smoke abatement and dust control are taked is following:
1) burning, smoke elimination: a wind gets into fire grate during boiler combustion; Coal in the burner hearth takes fire; The chimney arch that the top of the rear fire grate of burner hearth is provided with; Make furnace outlet be positioned at less height more than the bottom fire grate of burner hearth, " black smoke " that produces in the combustion process (carbon black particle and unburned fugitive constituent) from the chimney arch outlet through the time, compelledly return high temperature combustion zone on the fire grate by reignition.Simultaneously; By the combustion chamber draft that air-introduced machine produces, secondary wind is opened toward the interior air-supply of chimney arch and through the air-distribution device that is arranged on the chimney arch mouth automatically make chimney arch interruption-forming oxygen-rich area, black smoke fully burns at the chimney arch mouth and generates colourless carbon dioxide; Reach the purpose of smoke elimination, improved efficiency of combustion simultaneously.
2) dedusting: first heat transfer zone that the flue gas after burning, the smoke elimination gets into boiler; From bottom to top and through the time carry out heat exchange, get into second heat transfer zone of boiler then, get into the perpendicular smoke pipe of plurality of rows horizontal water tube and plurality of rows successively in second heat transfer zone; Its direction be horizontal water tube from front to back; First erects smoke pipe from top to bottom, and the second perpendicular smoke pipe is for from bottom to top, and flue gas dust in cyclic process falls into cleaning door at effect of inertia.
The method of a kind of miniature boiler burning of the present invention II, the smoke abatement and dust control of III class bituminous coal combustion; The breed of applying on the same day when described miniature boiler is applicant and present patent application is boiler dedicated, and it comprises burner hearth, chimney arch, coal feeding hole, loose cinder notch, gray-drawing port, overfire air device, horizontal smoke pipe, perpendicular smoke pipe, chimney arch cleaning door, cleaning door; Wherein, offer coal feeding hole, loose cinder notch and gray-drawing port on the burner hearth front console, loose cinder notch be located at coal feeding hole below, offer gray-drawing port below the loose cinder notch; The burner hearth rear end is provided with chimney arch; Establish first heat transfer zone above the burner hearth, burner hearth is established second heat transfer zone at the back; The right flank lower end of burner hearth is provided with overfire air device; First heat transfer zone is provided with some horizontal row smoke pipes, is provided with the chimney arch cleaning door below the horizontal smoke pipe to be used for removing the dust stratification on the chimney arch; Second heat transfer zone is provided with the perpendicular smoke pipe of plurality of rows, is provided with cleaning door below the perpendicular smoke pipe, and cleaning door and perpendicular smoke pipe communicate.Overfire air device is provided with aid distributing pipe, and this aid distributing pipe outlet is located in the chimney arch mouth.
The method of a kind of miniature boiler burning of the present invention II, the smoke abatement and dust control of III class bituminous coal combustion, described combustion medium is meant II, III class bituminous coal.The flue dust that II, III class bituminous coal are produced in the burner hearth combustion process is mainly the carbon black ion, and the carbon black ion can fully burn under high-temperature oxygen-enriched condition fully.
The method of a kind of miniature boiler burning of the present invention II, the smoke abatement and dust control of III class bituminous coal combustion owing to fully burn at chimney arch mouth flue dust, can be stopped over-emitting black exhaust at burning II, II I class bituminous coal fully; Because flue dust dust more than 90% after perpendicular smoke pipe three return cycle gets into cleaning door, dust emissions is extremely low.
The method of a kind of miniature boiler burning of the present invention II, the smoke abatement and dust control of III class bituminous coal combustion; Its positive meaning is; Small scall coal-fired boiler burning II, III class bituminous coal over-emitting black exhaust, discharging problem not up to standard have been solved; Efficient burning, clean environment firendly discharging can be realized, boiler thermal output can be improved more than 20%.
Applicant of the present invention did effectively checking, and when using II or III bituminous coal, flue gas does not have black smoke, and dust emission is less than 50mg/Nm
3, can substitute the burning anthracite fully, fume emission satisfies the environment protection emission requirement fully.
Description of drawings
Fig. 1 is the related miniature boiler structural representation of method of a kind of miniature boiler burning of the present invention II, the smoke abatement and dust control of III class bituminous coal combustion.
The specific embodiment
Below in conjunction with embodiment the present invention is done further elaboration.
Embodiment 1:
The method of a kind of miniature boiler burning II, the smoke abatement and dust control of III class bituminous coal combustion; Related boiler is as shown in the figure, and it comprises burner hearth 1, chimney arch 2, coal feeding hole 3, loose cinder notch 4, gray-drawing port 5, overfire air device 6, horizontal smoke pipe 7, perpendicular smoke pipe 8, chimney arch cleaning door 9, cleaning door 10; Wherein, offer coal feeding hole 3, loose cinder notch 4 and gray-drawing port 5 on burner hearth 1 front console, loose cinder notch 4 be located at coal feeding hole 3 below, offer gray-drawing port 5 below the loose cinder notch 4; Burner hearth 1 rear end is provided with chimney arch 2; Establish first heat transfer zone 11 above the burner hearth 1, second heat transfer zone 12 is established in burner hearth 1 back; The right flank lower end of burner hearth 1 is provided with overfire air device 6; First heat transfer zone 11 is provided with some horizontal row smoke pipes 7, is provided with chimney arch cleaning door 9 below the horizontal smoke pipe 7 to be used for removing the dust stratification on the chimney arch; Second heat transfer zone 12 is provided with the perpendicular smoke pipe 8 of plurality of rows, is provided with cleaning door 10 below the perpendicular smoke pipe 8, and cleaning door 10 communicates with perpendicular smoke pipe 8.As shown in the figure, overfire air device 6 is provided with aid distributing pipe 13, and these aid distributing pipe 13 outlets are located in the chimney arch mouth 2.
As shown in the figure, the method for a kind of miniature boiler burning II, the smoke abatement and dust control of III class bituminous coal combustion,
1) burning, smoke elimination: a wind gets into fire grate during boiler combustion; Coal in the burner hearth 1 takes fire; The flue gas that produces in the combustion process blocks the flue gas in the burner hearth 1 through the chimney arch 2 that burner hearth 1 rear is provided with in burner hearth 1, produces negative pressure simultaneously, and secondary wind is opened automatically toward chimney arch 2 interior air-supplies and made chimney arch 2 interruption-forming oxygen-rich areas; Flue dust is in 2 mouthfuls of fully burnings once more of chimney arch, and the flue dust that produces in the process can not burn until forming dust through burner hearth 1, chimney arch 2 circulating combustions once more;
2) dedusting: after carrying out heat exchange after first heat transfer zone 11 of the flue gas entering boiler after burning, the smoke elimination, second heat transfer zone 12 that gets into boiler gets into perpendicular smoke pipe 8 successively in second heat transfer zone 12; Its direction be the first perpendicular smoke pipe from top to bottom; The second perpendicular smoke pipe is for from bottom to top, and the 3rd perpendicular smoke pipe is for from top to bottom, and the rest may be inferred; Flue gas carries out heat exchange with water in the process of circulation, the dust in the flue gas falls into and erects the cleaning door 10 that smoke pipe 7 is communicated with at effect of inertia.
At length; II, III class bituminous coal are closed coal feeding hole 3, loose cinder notch 4, gray-drawing port 5 after in coal feeding hole 3 joins stove burner hearth 1; Wind gets into the fire grate of burner hearth 1 from wind inlet, the coal seam normal combustion, and bituminous coal generates flue dust and coal gas under the hot environment of fire grate top under the state of anoxic; Flue dust and coal gas get into the high temperature combustion zone on the fire grate under chimney arch 2 guiding; Under the situation of overfire air device 6 air-supplies, flue dust and coal gas is fully burning under the state of oxygen enrichment, and clean flame gets into the horizontal smoke pipe of first heat transfer zone 11 along chimney arch 2 rear channels.High temperature pyrotechnics carries out heat exchange at 7 li of the horizontal smoke pipes of first heat transfer zone 11 and water outside the smoke pipe, gets into second heat transfer zone 12 after the heat exchange, gets into perpendicular smoke pipe 8 then successively; Its direction be the first perpendicular smoke pipe from top to bottom; The second perpendicular smoke pipe is for from bottom to top, and the 3rd perpendicular smoke pipe is for from top to bottom, and the rest may be inferred; Flue gas carries out heat exchange with water in the process of circulation, the dust in the flue gas falls into and erects the cleaning door 10 that smoke pipe 8 is communicated with at effect of inertia.
As shown in the figure, the dust that produces on the chimney arch 2 can be cleared up through chimney arch cleaning door 9; Under the situation of air-introduced machine work, produce negative pressure, the air door that can open automatically once with overfire air device 6 gets in the burner hearth 1 air automatically, and whole process does not need manually-operated.The carbon black ion that II, III class bituminous coal produce in combustion process under the secondary excess oxygen simultaneously continues fully burning, has not only reached the purpose that eliminates smoke, and has also improved the thermal efficiency of boiler simultaneously.
The present invention can adopt II, III class bituminous coal to substitute anthracite fully, and operating cost coal per ton can be practiced thrift about 800 yuan, and can realize efficient burning, clean environment firendly discharging, can improve boiler thermal output more than 20%.
Claims (1)
1. the method for miniature boiler burning II, the smoke abatement and dust control of III class bituminous coal combustion is characterized in that:
1. burn, eliminate smoke: a wind gets into fire grate during boiler combustion; Coal in the burner hearth takes fire; The flue gas that produces in the combustion process blocks the flue gas in the burner hearth through the chimney arch that the burner hearth rear is provided with in burner hearth, produces negative pressure simultaneously, and secondary wind is opened automatically toward the interior air-supply of chimney arch and made chimney arch interruption-forming oxygen-rich area; Flue dust is in the fully burning once more of chimney arch mouth, and the flue dust that produces in the process can not burn until forming dust through burner hearth, chimney arch circulating combustion once more;
2. dedusting: after carrying out heat exchange after first heat transfer zone of the flue gas entering boiler after burning, the smoke elimination; Get into second heat transfer zone of boiler, get into the perpendicular smoke pipe of plurality of rows successively in second heat transfer zone, its direction be the first perpendicular smoke pipe from top to bottom; The second perpendicular smoke pipe is for from bottom to top; The 3rd perpendicular smoke pipe is for from top to bottom, and the rest may be inferred, and flue gas dust in cyclic process falls into cleaning door at effect of inertia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102776075A CN102798120A (en) | 2012-08-07 | 2012-08-07 | Combustion and smoke and dust removal method of small boiler combusting soft coal II and III |
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| CN2012102776075A CN102798120A (en) | 2012-08-07 | 2012-08-07 | Combustion and smoke and dust removal method of small boiler combusting soft coal II and III |
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| CN102798120A true CN102798120A (en) | 2012-11-28 |
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| CN2012102776075A Pending CN102798120A (en) | 2012-08-07 | 2012-08-07 | Combustion and smoke and dust removal method of small boiler combusting soft coal II and III |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927681A (en) * | 2012-11-12 | 2013-02-13 | 青岛艳阳天环保锅炉有限公司 | Boiler special for cultivation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2544226Y (en) * | 2002-03-22 | 2003-04-09 | 刘幼林 | Reverse combustion secondary air vertical multipurpose boiler |
| CN101725966A (en) * | 2008-11-26 | 2010-06-09 | 王森 | Circulating fluidized bed boiler integrating material separation and heat transfer |
-
2012
- 2012-08-07 CN CN2012102776075A patent/CN102798120A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2544226Y (en) * | 2002-03-22 | 2003-04-09 | 刘幼林 | Reverse combustion secondary air vertical multipurpose boiler |
| CN101725966A (en) * | 2008-11-26 | 2010-06-09 | 王森 | Circulating fluidized bed boiler integrating material separation and heat transfer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927681A (en) * | 2012-11-12 | 2013-02-13 | 青岛艳阳天环保锅炉有限公司 | Boiler special for cultivation |
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Application publication date: 20121128 |