CN2248290Y - Biological material-burning fluidized bed boiler - Google Patents
Biological material-burning fluidized bed boiler Download PDFInfo
- Publication number
- CN2248290Y CN2248290Y CN 95227150 CN95227150U CN2248290Y CN 2248290 Y CN2248290 Y CN 2248290Y CN 95227150 CN95227150 CN 95227150 CN 95227150 U CN95227150 U CN 95227150U CN 2248290 Y CN2248290 Y CN 2248290Y
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Abstract
The utility model relates to a biological material-burning fluidized bed boiler, which mainly composed of a feeder, a blower, a grid plate, a dense phase region, a dilute phase region, a burning chamber and a convection heating surface. The utility model is characterized in that various biological fuels, such as dry wooden sheets, saw wooden dust, melon seed skins, coffee grounds, bagasse, paddy casings, etc., can be burnt by the boiler. The great heat source of the dense phase region is used, the various biological fuels still can be ignited and burnt when biological material water content is as high as 50 percent to 60 percent, and the thermal efficiency of the boiler reaches more than 80 percent. The utility model has the advantages of CO < 2 > zero discharge, etc., large numbers of energy can be saved, and the utility model can be used for the areas with rich biological resources and deficient mineral fuels to generate steam or generate electricity.
Description
The utility model relates to a kind of boiler, the flammable bio-fuels such as fuzz stick, wood shavings, wet wooden unit, wood chip, bagasse, rice hulls, melon seeds skin, coffee grounds, tangerine bar that in fluid bed, burn of this boiler utilization specifically, thus a kind of device of heat energy from fluid bed, reclaimed.
The utilization of China's biomass energy at present mostly based on direct inefficient burning, is generally 10～20% as the thermal efficiency of agricultural bavin kitchen range stove, and the living beings that burn by this way account for about 80% of annual total living beings of being utilized greatly.It is a huge energy loss.From early eighties, begin to develop suitable biomass gasification device, existing subject matter be: the calorific value of (1) combustion gas is low; (2) living beings gasification rate is low.On the other hand, biological waste of a great variety, quite a few biological waste is not suitable for gasification, only can be used as fuel.Therefore, domestic part boiler producer once designed to produce with chain furnace or promoted furnace grate and came biomass burning, for example burn rice hulls, waste wood etc., but because the living beings dust burdening is very low, density is very little, organizes difficulty of ratio of combustion, efficiency of combustion is very low, after the living beings water content improves, be difficult to catch fire, can not stable operation.
The purpose of this utility model is: low in order to solve existing layer combusting boiler efficiency of combustion, for the high-moisture biomass fuel can not smooth combustion etc. shortcoming, and existing biomass gas-making furnace system gas calorific value is low, problems such as rate of gasification is low, and design a kind of efficiency of combustion height, stable, oligosaprobic biomass-burning fluidized-bed combustion boiler.Can save a large amount of energy, and have CO
2The characteristics of zero-emission.
The utility model mainly by charging gear 1, bellows 2, air distribution plate 3, emulsion zone 4, dilute-phase zone 5, whirlwind burning chamber 6, superheater 7 (when being saturated vapor, do not have superheater) convection calandria 8, economizer 9, air preheater 10 (, can cancel), emulsion zone heating surface 11 when when not required, form.Charging gear 1 is a square structure, be embedded on the dilute-phase zone furnace wall by fixture, feed feeds emulsion zone 4, bellows 2 are square structure, be welded on the air distribution plate 3, air distribution plate is square porous plate, emulsion zone 4 is made up of medium (river sand or quartz sand) and feed on air distribution plate 3, arranges the emulsion zone heating surface in the emulsion zone 4, it on the emulsion zone dilute-phase zone, arrange water wall surface in the dilute-phase zone, the dilute-phase zone outlet is whirlwind burning chamber 6 (side or postposition), arranging section heating surface in the burning chamber, burning chamber's outlet is superheater 7 (if saturated vapor, no superheater 7) superheater is the coiled pipe structure, and convection calandria 8 is made up of the tube bank that is connected in lower drum, and economizer 9 is cast iron gilled tube economizer or coiled pipe structure, be supported in the back-end ductwork by fixture, air preheater 10 is that vertical seamed steel pipe is formed.Emulsion zone heating surface 11 is a steel-tube construction, and the bottom is connected in lower collecting box, and top is connected with the water-cooling wall of dilute-phase zone 5.Its principle is that bio-fuel is sent into combustion chamber emulsion zone 4 by dispenser 1, fully mixes at emulsion zone and bed material, and moisture evaporates rapidly, make bio-fuel can be rapid fire burns.The fully right bio-fuel of being carried secretly by flue gas that burns forms second level burning dilute-phase zone 5 in and the further mixed combustion of secondary wind, because the emulsion zone bed temperature is generally between 850～950 ℃, and fuel combustion generation harmful substance NO
xCan greatly reduce.General bio-fuel sulfur content is very low, so SO
2Discharge capacity also very low, the bio-fuel high for indivedual sulfur content can add lime stone as absorbent at emulsion zone, can reduce SO greatly
xDischarging.In order further to improve efficiency of combustion, arrange that in the dilute-phase zone outlet whirlwind burning chamber 6 forms third level burning, can increase the time of staying of flue gas and imperfect combustion solids, make it in burning chamber, further to burn.Convection heating surface (7,8,9,10) after the burning chamber is identical with conventional grate firing boiler.
Grate firing boiler belongs to layer combustion, when bio-fuel is delivered on the fire grate by feed hopper, can not resemble even distribution the coal, forms became uneven easily on fire grate.Because the place of thin thickness, resistance is little, and therefore a large amount of air blow sky from entering burner hearth here with thin layer, and the air short circuit enters burner hearth, can not be used for fully burning; And the thick place of the bed of material needs a large amount of air to be used for burning, because resistance is bigger here, thereby air capacity is burnt required air capacity for few.The characteristics of living beings are that fugitive constituent is very high, and in the incipient stage of burning, fugitive constituent is separated out in a large number, need a large amount of air be used for burning, can cause the gas incomplete combustion loss sharply to increase as lack of air at this moment.Simultaneously, because living beings are low weight, blown off bed and take burner hearth out of by air easily, cause the solid incomplete combustion loss very big like this, thereby efficiency of combustion is very low, on the other hand, when the bio-fuel moisture content is very high, water evaporates needs a large amount of heats, so bio-fuel is difficult to catch fire at bed face, or the postponement of catching fire, can not in time burn, also cause the solid incomplete combustion loss very high, cause boiler combustion efficiency very low.
Adopt the fluidized bed combustion mode, emulsion zone mainly is made up of medium (river sand or quartz sand), after bio-fuel is sent into emulsion zone by dispenser 1, at first fully mix at emulsion zone and medium, the general temperature of the inert bed material of emulsion zone (medium) has very high thermal capacity, even the living beings moisture content is up to 50～60% between 850～950 ℃, moisture content also can be evaporated rapidly, make fuel rapid fire burns.Owing to adopt two-stage combustion in the stove, add third level burning in the whirlwind burning chamber, efficiency of combustion can reach 99.5%.
The utlity model has the efficiency of combustion height, flameholding can use the bio-fuel of high moisture content, and fuel tolerance is wide, SO
x, NO
x, discharge capacity is low, can save a large amount of energy, and has CO
2Advantages such as zero-emission.
The utility model can be applied to 4～35t/h biomass-burning fluidized-bed combustion boiler.
Fig. 1 is the utility model master view principle figure.
Fig. 2 is the right pseudosection of the utility model.
Embodiment:
Combustion bagasse fluidized-bed combustion boiler: parameter is D=12.5t/h, and P=1.6MPa produces two outlet Thailand by the boiler factory, Changchun, and operational effect is good.Combustion chips fluidized-bed combustion boiler is produced two D=10t/h, P=1.25MPa, superheat steam temperature t by Yingkou Boiler Gen. Factory "
G '=350 ℃, efficiency of combustion is 99.5%, and boiler efficiency η=83.3% is loaded on Dalian Economic and Technological Development District, and operation result shows: this stove and accessory has the efficiency of combustion height, flameholding, advantage such as fuel tolerance is wide.Combustion rice hulls fluidized-bed combustion boiler parameter is: D=4t/h, P=1.25MPa produces outlet Thailand by the boiler factory, Changsha.
Claims (1)
1. biomass-burning fluidized-bed combustion boiler, it is characterized in that: charging gear [1] is embedded on dilute-phase zone [5] furnace wall by fixture, feed feeds emulsion zone [4], bellows [2] are welded on the air distribution plate [3], emulsion zone [4] is on air distribution plate [3], arrange the emulsion zone heating surface in the emulsion zone [4], be dilute-phase zone on the emulsion zone [4], arrange water wall surface in the dilute-phase zone, dilute-phase zone [5] outlet is whirlwind burning chamber [6], the interior arranging section heating surface of burning chamber [6], burning chamber [6] outlet is superheater [7], convection calandria [8] is made up of the tube bank that is connected in lower drum, economizer [9] is supported in the back-end ductwork by fixture, air preheater [10] is that vertical seamed steel pipe is formed, and emulsion zone heating surface [11] bottom is connected in lower collecting box, and top is connected with the water-cooling wall of dilute-phase zone [5].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95227150 CN2248290Y (en) | 1995-12-18 | 1995-12-18 | Biological material-burning fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95227150 CN2248290Y (en) | 1995-12-18 | 1995-12-18 | Biological material-burning fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2248290Y true CN2248290Y (en) | 1997-02-26 |
Family
ID=33873109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95227150 Expired - Fee Related CN2248290Y (en) | 1995-12-18 | 1995-12-18 | Biological material-burning fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2248290Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098911C (en) * | 1998-12-30 | 2003-01-15 | 中国科学院广州能源研究所 | Biomass gasifying and purifying circular fluid-bed system |
| CN100520180C (en) * | 2006-08-19 | 2009-07-29 | 连云港协鑫环保生物质热电有限公司 | Material conveying method and system for conveying biomass into furnace in large quantity for direct combustion power generation |
| CN101793389A (en) * | 2010-04-09 | 2010-08-04 | 无锡华光锅炉股份有限公司 | Bagasse-fired boiler |
| CN101949535A (en) * | 2010-09-28 | 2011-01-19 | 哈尔滨工业大学 | Low-ratio biomass circulating fluidized bed boiler and combustion method thereof |
| CN101407722B (en) * | 2008-10-10 | 2011-11-09 | 哈尔滨工业大学 | Biomass high temperature pyrolysis and gasification and high temperature pyrolysis gas catalytic purification process |
| CN102901212A (en) * | 2012-10-22 | 2013-01-30 | 哈尔滨工业大学 | Low-range circulating fluidized bed water boiler for combusting inferior fuel and combustion method thereof |
-
1995
- 1995-12-18 CN CN 95227150 patent/CN2248290Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098911C (en) * | 1998-12-30 | 2003-01-15 | 中国科学院广州能源研究所 | Biomass gasifying and purifying circular fluid-bed system |
| CN100520180C (en) * | 2006-08-19 | 2009-07-29 | 连云港协鑫环保生物质热电有限公司 | Material conveying method and system for conveying biomass into furnace in large quantity for direct combustion power generation |
| CN101407722B (en) * | 2008-10-10 | 2011-11-09 | 哈尔滨工业大学 | Biomass high temperature pyrolysis and gasification and high temperature pyrolysis gas catalytic purification process |
| CN101793389A (en) * | 2010-04-09 | 2010-08-04 | 无锡华光锅炉股份有限公司 | Bagasse-fired boiler |
| CN101949535A (en) * | 2010-09-28 | 2011-01-19 | 哈尔滨工业大学 | Low-ratio biomass circulating fluidized bed boiler and combustion method thereof |
| CN101949535B (en) * | 2010-09-28 | 2011-10-19 | 哈尔滨工业大学 | Low-ratio biomass circulating fluidized bed boiler and combustion method thereof |
| CN102901212A (en) * | 2012-10-22 | 2013-01-30 | 哈尔滨工业大学 | Low-range circulating fluidized bed water boiler for combusting inferior fuel and combustion method thereof |
| CN102901212B (en) * | 2012-10-22 | 2015-03-11 | 哈尔滨工业大学 | Low-range circulating fluidized bed water boiler for combusting inferior fuel and combustion method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |