CN202613429U - Biomass circulating fluidized bed direct-burning device - Google Patents
Biomass circulating fluidized bed direct-burning device Download PDFInfo
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- CN202613429U CN202613429U CN2012201076926U CN201220107692U CN202613429U CN 202613429 U CN202613429 U CN 202613429U CN 2012201076926 U CN2012201076926 U CN 2012201076926U CN 201220107692 U CN201220107692 U CN 201220107692U CN 202613429 U CN202613429 U CN 202613429U
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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 utility model discloses a biomass circulating fluidized bed direct-burning device which comprises a burning system, a feeding system, a cyclone separator, a recycling system, a vapor-water heating system and an air pre-heating system. The hearth is provided with an oxygen enrichment device which is used to adjust the burning atmosphere so as to assist burning of low heating value fuel, effectively strengthen the burning stability and improve the burning efficiency. A flue arranged between an upper opening of the cyclone separator and a medium temperature platen superheater adopts a converging pipeline to improve the flow speed of smoke and improve the thermal efficiency. The number of external hoods of an air-distribution device is increased to prevent a dead zone in fluidization from happening. The gradient of a recycling opening is reduced and a horizontal segment is arranged to release abrasion of hoods. A smoke flow guide device is arranged at the tail of the flue to reduce abrasion of heated area. A vertical pipe of the spiral feeding machine is provided with a double layer disturbance wind device to loosen scattered materials. A discharging pipe is provided with an air cooling sleeve and a material-distribution machine to prevent materials from burning and blocking in the feeding device.
Description
Technical field
The utility model relates to a kind of recirculating fluidized bed direct combustion device, especially a kind of recirculating fluidized bed direct combustion device that uses living beings such as leaf, trunk, bark.
Background technology
Along with the rapid growth of world energy sources demand, with coal, oil, natural gas be the conventional energy resource of representative will be finally by exploitation totally.Seeking a kind of reproducible new forms of energy, is the important channel that solves energy crisis and environmental problem.In numerous regenerative resources, biomass energy has great potentiality to be exploited with abundant, the easy to clean and reproducible characteristics of its resource reserve.Spelt out the developing goal that the biomass energy installed capacity of the year two thousand twenty China reaches 30GW in renewable that hope medium-term and long-term plans of China in 2007 issue.
Circulating fluidized bed technique is because fuel tolerance is wide, environmental protection characteristic is superior, ignition temperature can reduce coking and etching problem near being controlled at 800 ℃, extremely people's favor and the concern in the biomass combustion field in recent years.Yet with the coal facies ratio, living beings have the volatile content height, oxygen content is high, fixed carbon content is low, ignition point is low, the tail-off time is short, sulphur content content is low and characteristics such as alkali metal and chloride ion content height.Prior biological matter recirculating fluidized bed direct combustion device is as shown in Figure 1; The flue that comprises burner hearth 101, combustion system, charging gear 110, cyclone separator 102, revert system, carbonated drink heating system and bending type; Flue is made up of first flue, second flue and the 3rd flue of bending; The top outlet of cyclone separator 102 is communicated with the leading portion of flue, superheater 103,107, reheater 104, economizer 105 and air preheater 106,103,107, reheater 104, economizer 105 and air preheater 106 is installed in the back segment of flue successively constitutes the carbonated drink heating system; Revert system comprises returning charge air compartment, U type valve 108 and returning charge mouth; U type valve 108 is positioned at the returning charge air compartment, and the lower part outlet of cyclone separator 102 is communicated with the returning charge air compartment, and the returning charge mouth of revert system is connected with the bottom of burner hearth 101; One time wind 109 is blown into from burner hearth 101 bottoms; Secondary wind 113 is blown into from the sidewall at burner hearth 101 middle parts, when adopting this conventional fluid unit to carry out direct combustion, also has following problem usually:
1 feed difficulty: the tenacity of fibre of the high fiber content material of living beings poor mobile performance, loosely organized, particularly sugarcane top and bagasse-like is big, in course of conveying, tangles easily, unites, and forms the bulk material, and phenomenon results in blockage.
2 alkali metal dust stratifications, etching problem: the alkali metal content that biomass fuel is high causes convection heating surface to form sintered deposit easily, produces high temperature alkali metal etching problem.
3 combustion adaptive property problems: because the diversity and the seasonality of biomass fuel; Its combustion characteristics is changeable; For moist, rainy season, the biomass fuel moisture of collecting is high, calorific value is low especially, occurs problems such as furnace pressure fluctuation, burning are insufficient, poor stability in the combustion process.
4 wear problems: circulating ash falls into burner hearth through material returning device, because the inclination angle of returning charge mouth is bigger, generally about 60 °, the cigarette ash of the returning charge mouth of flowing through circulating ash under gravity and fluidisation wind action is directly washed away blast cap, easily blast cap is produced wearing and tearing.
The utility model content
The purpose of the utility model provides a kind of biomass circulating fluid bed direct combustion device of can directly burn leaf, trunk, bark biolobic material; This burner can effectively solve the putty problem, alleviation heating surface coking and the burn into that occur in the living beings feed and realize advantages such as efficiency of combustion is high, and fuel tolerance is wide.
The above-mentioned purpose of the utility model realizes through following technical scheme: a kind of biomass circulating fluid bed direct combustion device; The flue that comprises burner hearth, combustion system, feeding system, cyclone separator, revert system and bending type; The top outlet of said cyclone separator is communicated with the leading portion of said flue; First superheater, second superheater, reheater, economizer and air preheater are installed in the back segment of flue successively, and described revert system comprises returning charge air compartment, U type valve and returning charge mouth, and U type valve is positioned at the returning charge air compartment; The lower part outlet of cyclone separator is communicated with the returning charge air compartment; The returning charge mouth of revert system is connected with lower furnace portion, it is characterized in that: described combustion system includes oxygen-enriching device, and said oxygen-enriching device is arranged on the outer wall in the middle part of the burner hearth and with burner hearth and connects; Supplemental oxygen is with combustion-supporting, to improve the efficiency of combustion of biomass fuel in burner hearth.
Said biomass fuel shredding machine through belt with the mass transport of fragmentation to screw(-type) feeder, batcher connects burner hearth, carries biomass fuel to burner hearth; The exhanst gas outlet of burner hearth connects cyclone separator, and the top of cyclone separator exports first flue of the burner hearth that is connected, and the bottom links via the emulsion zone of U type valve and burner hearth.Along flue gas flow direction, be provided with second flue, the 3rd flue at the back at first flue.Described first flue is arranged pendant superheater, and second flue is provided with convection superheater, reheater from bottom to top, and the 3rd flue is arranged economizer and air preheater from top to bottom.
In the utility model; Described oxygen-enriching device comprises air separator, the high-concentration oxygen bellows that link to each other successively; Air channel and nozzle, said air channel is provided with valve, and the entrance point of said air separator connects an airduct; Air separator separation of high-concentration oxygen gets into described high-concentration oxygen bellows, and said nozzle is divided into two-layer up and down and inserts burner hearth respectively with jet flow oxygen in burner hearth.
In the utility model, described first superheater is middle temperature pendant superheater, and the flue section of said flue between outlet of the top of cyclone separator and middle temperature pendant superheater is the convergent flue, with raising the flue gas speed here of flowing through.
In the utility model; The returning charge air compartment of described revert system is being arranged side by side two square air-distribution devices with place, said U type valve opposite, is respectively the loosening air-distribution device of high temperature ash upstream chamber and the fluidisation air-distribution device of downstream chamber, and described loosening air-distribution device is provided with the identical two-layer blast cap of structure with the fluidisation air-distribution device; Be respectively internal layer blast cap and outer blast cap; Wherein, the internal layer blast cap is made up of a plurality of circular wind hole, and a plurality of circular wind hole is arranged in a concentric circles; Outer blast cap also is made up of a plurality of circular wind hole, a plurality of circular wind hole be arranged in one square.Described outer blast cap quantity arranging density is greater than internal layer blast cap quantity arranging density.
In the utility model; The returning charge mouth of said revert system is obliquely installed; Has slanted angle γ between returning charge mouth and the horizontal plane; This slanted angle γ is between 20～30 °, and the bottom of said returning charge mouth and burner hearth junction has the blanking platform of level, and said returning charge mouth is provided with material seeding outlet in the direction towards burner hearth.
In the utility model, the turning flue section of said flue between reheater and economizer is provided with the flue gas guiding device, and this flue gas guiding device is made up of 3～5 flow deflectors.
In the utility model; Described feeding system comprises screw(-type) feeder, standpipe, defeated material air compartment and the material blanking tube that is communicated with successively; Said standpipe vertically is provided with, the oblique setting of said material blanking tube, and said standpipe is provided with the two-layer disturbance wind nozzle that is used in standpipe, spraying wind; Be respectively ground floor disturbance wind nozzle that is positioned at the upper strata and the second layer disturbance wind nozzle that is positioned at lower floor; Ground floor disturbance wind nozzle horizontal arrangement, second layer disturbance wind nozzle is oblique to be provided with down, sprays into to have slanted angle α between angle and the horizontal plane.
In the utility model; Said slanted angle α is between 30～40 °; The quantity of every layer of nozzle is four in the said two-layer disturbance wind nozzle; Be evenly distributed on standpipe around, the jet apertures of second layer disturbance wind nozzle is greater than the jet apertures of ground floor disturbance wind nozzle, the aperture of each layer jet apertures is identical.
In the utility model, be furnished with the air-cooled sleeve of stainless steel on the said material blanking tube, and form sealed Heat Room between the blanking outer wall; Be furnished with the fin that is beneficial to heat radiation on the outer wall of described material blanking tube; Described air-cooled sleeve is provided with air inlet and air outlet, and described air inlet is connected with an airduct, and air outlet is connected with secondary air channel; The tail end lower disposed of said material blanking tube has material feeder, helps sending out of material.
In the utility model, have slanted angle β between said material blanking tube and the horizontal plane, this slanted angle β is between 60 °～90 °.
Compared with prior art, the utlity model has following remarkable result:
(1) arranges oxygen-enriching device at burner hearth in the utility model,, thereby, strengthen combustion stability, improve efficiency of combustion for the low calorie fuels burning provides combustion-supporting as the adjusting of combustion atmosphere.
(2) the utility model fluid bed direct combustion device adopts the convergent pipeline to connect cyclone separator outlet and middle temperature pendant superheater; To improve flue gas speed, in the horizontal channel of flue, because flue-gas temperature is high; Ash particle is softer; Flying dust is lighter to the wearing and tearing of heating surface, thus the heat transfer coefficient of warm pendant superheater in improving, the thermal efficiency of raising boiler.
(3) the utility model fluid bed direct combustion device burner hearth flue gas warm pendant superheater in the convergent pipe flushing; Because cigarette speed is high; Reduced the dust stratification of middle temperature pendant superheater; Because there is alkali metal in the outer grieshoch of heating surface tube wall, effectively reduce in the biomass combustion process alkali metal to the coking and the high temperature corrosion problem of heating surface.
(4) the utility model fluid bed direct combustion device is in two air-distribution devices of U type valve, at the skin of installation plate the blast cap quantity of higher density is set, and prevents in U type valve body, to form fluidisation " dead band ".
(5) gradient of the returning charge mouth that reduces of the utility model fluid bed direct combustion device is designed to the blanking platform of level with the burner hearth junction, and arranges that at returning charge mouth section place material seeding outlet links to each other, and prevents blast cap wearing and tearing, flue gas anti-channeling;
(6) the utility model fluid bed direct combustion device is arranged the flue gas guiding device at the chimney intake turning on economizer top, and the guiding flue gas evenly gets into and reduce the flow velocity of flue gas, reduces the wearing and tearing to heating surface.
(7) the utility model fluid bed direct combustion device is arranged two-layer disturbance wind nozzle at batcher standpipe place, can play the loose effect that disperses of disturbance to various different types of agglomerating biomass fuels.
(8) the utility model fluid bed direct combustion device is arranged air-cooled sleeve of stainless steel and material feeder on the material blanking tube of batcher, prevents material in feeding system internal combustion and obstruction, and it is combustion-supporting to reclaim heat entering burner hearth.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further explain.
Fig. 1 is the general structure sketch map of biomass circulating fluid bed direct combustion device in the prior art;
Fig. 2 is the general structure sketch map of the utility model biomass circulating fluid bed direct combustion device;
Fig. 3 is the structural representation of oxygen-enriching device in the utility model biomass circulating fluid bed direct combustion device;
Fig. 4 is the structural representation of convergent flue in the utility model biomass circulating fluid bed direct combustion device;
Fig. 5 is the A-A cutaway view of Fig. 4;
Fig. 6 is the structural representation of U type valve in the utility model biomass circulating fluid bed direct combustion device;
Fig. 7 is the B-B cutaway view of Fig. 6;
Fig. 8 is the structural representation of returning charge mouth in the utility model biomass circulating fluid bed direct combustion device.
Fig. 9 is that the N of Fig. 8 is to view;
Figure 10 is the structural representation of guiding device in the utility model biomass circulating fluid bed direct combustion device;
Figure 11 is the structural representation of screw feeder system in the utility model biomass circulating fluid bed direct combustion device;
Figure 12 is the C-C cutaway view of Figure 11;
Figure 13 is the D-D cutaway view of Figure 11.
Description of reference numerals
101, burner hearth; 102, cyclone separator; 103, superheater; 104, reheater;
105, economizer; 106, air preheater; 107, superheater;
108, U type valve; 109, wind; 110, charging gear; 111, belt;
112, shredding machine; 113, secondary wind; 114, water-cooled screen;
1, burner hearth; 2, cyclone separator; 3, convergent flue; 4, middle temperature pendant superheater;
5, reheater; 6, guiding device; 7, convection superheater; 8, economizer;
9, air preheater; 10, oxygen-enriching device; 10a, air separator; 10b, high-concentration oxygen bellows;
10c, air channel; 10d, nozzle; 10e, valve; 11, secondary wind; 12, returning charge air compartment;
13, U type valve; 14, loosening air-distribution device; 14a, internal layer blast cap; 14b, outer blast cap;
15, fluidisation air-distribution device; 15a, internal layer blast cap; 15b, outer blast cap; 16, material seeding outlet;
16a, material seeding nozzle; 17, wind; 18, returning charge mouth; 19, air inlet; 20, material feeder;
21, material blanking tube; 21a, fin; 22, Heat Room; 23, air outlet; 24, air-cooled sleeve;
25, seal box; 26, carry air compartment; 27, standpipe; 28, second layer disturbance wind nozzle;
29, ground floor disturbance wind nozzle; 30, shredding machine; 31, belt; 32, screw(-type) feeder;
33, high temperature pendant superheater; 34, flue-gas temperature detector
The specific embodiment
Like Fig. 2 to a kind of biomass circulating fluid bed direct combustion device shown in Figure 13; The flue that comprises burner hearth 1, combustion system, feeding system, cyclone separator 2, revert system, carbonated drink heating system, air preheating system and bending type; The outlet of the top of cyclone separator 2 is communicated with the leading portion of flue, first superheater, second superheater, reheater 5, economizer 8 and air preheater 9, the first superheaters are installed successively are middle temperature pendant superheater 4 in the back segment of flue, second superheater is a convection superheater 7; Revert system comprises returning charge air compartment 12, U type valve 13 and returning charge mouth 18; U type valve 13 is positioned at returning charge air compartment 12, and the lower part outlet of cyclone separator 2 is communicated with returning charge air compartment 12, and the returning charge mouth 18 of revert system is connected with burner hearth 1 bottom; Combustion system includes oxygen-enriching device 10; Oxygen-enriching device 10 is arranged on the outer wall at burner hearth 1 middle part and with burner hearth 1 and connects, and supplemental oxygen is with combustion-supporting, to improve the efficiency of combustion of biomass fuel in burner hearth 1.
Biomass fuel by shredding machine 30 through belt 31 with the mass transport of fragmentation to screw(-type) feeder 32, material is connected burner hearth 1 through standpipe 27 with material blanking tube 21, to burner hearth 1 conveying biomass fuel; The exhanst gas outlet of burner hearth 1 connects cyclone separator 2; The top of cyclone separator 2 exports first flue, the second flue flue, the 3rd flue of the burner hearth 1 that is connected; First flue, the second flue flue, the 3rd flue are communicated with successively, are the " of bending, wherein; Warm pendant superheater 4 during first flue is arranged; Second flue is provided with convection superheater 7, reheater 5, the three flues from bottom to top and arranges economizer 8 and air preheater 9 from top to bottom, and middle temperature pendant superheater 4, convection superheater 7, reheater 5, economizer 8 and air preheater 9 have constituted the carbonated drink heating system of this direct combustion device.
The lower part outlet of cyclone separator 2 links to each other with the gas approach end of U type valve 13; The returning charge air compartment 12 of revert system is being arranged side by side two square air-distribution devices with place, U type valve 13 opposites; Be respectively the loosening air-distribution device 14 of high temperature ash upstream chamber and the fluidisation air-distribution device 15 of downstream chamber, loosening air-distribution device 14 is provided with two-layer blast cap with fluidisation air-distribution device 15, is respectively internal layer blast cap 14a, 15a and outer blast cap 14b, 15b; The setting of the two-layer blast cap in loosening air-distribution device 14 and the fluidisation air-distribution device 15 is identical with arrangement mode; Wherein, internal layer blast cap 14a, 15a are made up of a plurality of circular wind hole, and a plurality of circular wind hole is arranged in a concentric circles; Outer blast cap 14b, 15b also are made up of a plurality of circular wind hole; A plurality of circular wind hole be arranged in one square, blast cap quantity arranges that density increases progressively from the inside to the outside, prevents that U type valve from forming fluidisation " dead band ".The smoke outlet of U type valve 13 is communicated with returning charge mouth 18, and returning charge mouth 18 is obliquely installed, and has slanted angle γ between returning charge mouth 18 and the horizontal plane; Prevent the blast cap wearing and tearing; This slanted angle γ is 20 °, and is designed to the blanking platform of level with burner hearth 1 junction, and returning charge mouth 18 also is provided with material seeding outlet 16 in the direction towards burner hearth 1; Prevent flue gas to U type valve 13 anti-channelings, returning charge mouth 18 is communicated with burner hearth 1.
Described oxygen-enriching device 10 comprises air separator 10a, the high-concentration oxygen bellows 10b that links to each other successively; Air channel 10c and nozzle 10d; Air channel 10c is provided with valve 10e; The entrance point of air separator 10a connects an airduct, and air separator 10a separation of high-concentration oxygen gets into high-concentration oxygen bellows 10b, and nozzle 10d is divided into two-layer up and down and inserts burner hearth 1 respectively with jet flow oxygen in burner hearth 1.Described valve gets into burner hearth 1 oxygen-enriched atmosphere flow through the temperature control that chamber flue gas temperature detector 34 detects, and regulates freeboard temperature in 800 ℃.Described oxygen-enriching device 10 be arranged in the water-cooling wall vertical direction 1/2 zone.
In the present embodiment, the flue section of burner hearth flue between outlet of the top of cyclone separator 2 and middle temperature pendant superheater 4 is convergent flue 3, with raising the flue gas speed here of flowing through.The turning flue section of burner hearth flue between reheater 5 and economizer 8 is provided with flue gas guiding device 6, and this flue gas guiding device 6 is made up of 3 flow deflectors.
Described screw feeder system comprises screw(-type) feeder 32, standpipe 27, defeated material air compartment 26 and the material blanking tube 21 that is communicated with successively, and standpipe 27 vertically is provided with, material blanking tube 21 oblique settings; Have slanted angle β between material blanking tube 21 and the horizontal plane, this slanted angle β is 60 °, and standpipe 27 is provided with the two-layer disturbance wind nozzle that is used in standpipe, spraying wind; Be respectively ground floor disturbance wind nozzle 29 that is positioned at the upper strata and the second layer disturbance wind nozzle 28 that is positioned at lower floor; Ground floor disturbance wind nozzle 29 horizontal arrangement can be to loosening through the biomass fuel here, prevents that biomass fuel from uniting; The 28 oblique settings down of second layer disturbance wind nozzle; When biomass fuel is loosened, also play the effect that biomass fuel is quickened, make biomass fuel more be prone to get in the burner hearth 1, have slanted angle α between second layer disturbance wind nozzle 28 and the horizontal plane; Slanted angle α is 30 °; The quantity of every layer of nozzle is four in the two-layer disturbance wind nozzle, be evenly distributed on standpipe 27 around, the jet apertures of second layer disturbance wind nozzle 29 is greater than the jet apertures of ground floor disturbance wind nozzle 28; The aperture of each layer jet apertures is identical, and the ratio of two-layer nozzle small aperture is to calculate affirmation through simulation standpipe flow field.
Be furnished with the air-cooled sleeve 24 of stainless steel on the said material blanking tube 21; And form sealed Heat Room 22 between material blanking tube 21 outer walls, be furnished with the fin 21a that is beneficial to heat radiation on the outer wall of material blanking tube 21, air-cooled sleeve 24 is provided with air inlet 19 and air outlet 23; Add material blanking tube seal box 25 during installation; Air inlet 19 is connected with an airduct, and air outlet 23 is connected with secondary air channel, and it is combustion-supporting to get into burner hearth through the heat that absorbs material blanking tube 21; The tail end lower disposed of material blanking tube 21 has material feeder 20, helps sending out of blanking port material.
In the present embodiment; Slanted angle γ between returning charge mouth 18 and the horizontal plane can be between 20～30 ° value; Flue gas guiding device 6 can be made up of 3～5 flow deflectors; Slanted angle α between second layer disturbance wind nozzle 29 and the horizontal plane can be between 30～40 ° value, have slanted angle β between material blanking tube 21 and the horizontal plane, this slanted angle β is between 60 °～90 °.
During the operation of the utility model biomass circulating fluid bed direct combustion device; Flue gas flow is following: biomass fuel by shredding machine 30 through belt 31 with the mass transport of fragmentation to screw(-type) feeder 32; Material is connected burner hearth 1 through standpipe 27 with material blanking tube 21, carries biomass fuel to burner hearth 1.One time wind 17 gets into 1, wind 17 of burner hearth as fluidized wind effect and mixing of materials burning by air preheater 9 heating backs, provides burning required air; Secondary wind 11 gets into burner hearth 1 by air preheater 9 heating backs, and the air that aftercombustion is required is strengthened the disturbance to burning; Oxygen-enriched atmosphere is injected burner hearth by nozzle 10d, regulates combustion atmosphere, and the burning of burning for high-moisture, low heat value biomass provides combustion-supporting, strengthens its steady combustion and efficiency of combustion.Produce high-temperature flue gas in burner hearth 1 internal combustion, high-temperature flue gas upwards washes away high temperature pendant superheater 33, reduces the temperature in burner hearth 1 exit, effectively reduces the coking and the corrosion of flue surface.Flue gas gets into cyclone separator 2 by burner hearth 1 outlet, and the fine grained that flue gas carries is collected by cyclone separator 2, and fine grained one tunnel gets into U type valve 13, and the high temperature ash gets into returning charge mouth 18 through U type valve 13, gets into burner hearth 1 again; The flue gas of cyclone separator 2 passes through to get into horizontal flue by top; Again through convergent flue 3 successively through guiding device 6, economizer 8 and the air preheater 9 of the convection superheater 7 of the middle temperature pendant superheater 4 of first flue, second flue and reheater 5, the 3rd flue; Convergent pipeline 3 has improved the speed of flue gas, because flue-gas temperature is high, ash particle is softer; Flying dust is lighter to the wearing and tearing of heating surface; Thereby the heat transfer coefficient of warm pendant superheater 4 in improving, the thermal efficiency of raising boiler reduces the high temperature corrosion of superheater; Guiding device 6 guiding flue gases evenly get into and reduce the flow velocity of flue gas, reduce the wearing and tearing to flue final stage heating surface.
The foregoing description of the utility model is not the qualification to the utility model protection domain; The embodiment of the utility model is not limited thereto; According to the foregoing of the utility model,, do not breaking away under the above-mentioned basic fundamental thought of the utility model prerequisite according to the ordinary skill knowledge and the customary means of this area; Modification, replacement or the change of other various ways that the utility model said structure is made all should drop within the protection domain of the utility model.
Claims (10)
1. biomass circulating fluid bed direct combustion device; The flue that comprises burner hearth (1), combustion system, feeding system, cyclone separator (2), revert system and bending type; The top outlet of said cyclone separator (2) is communicated with the leading portion of said flue; First superheater, second superheater, reheater (5), economizer (8) and air preheater (9) are installed in the back segment of flue successively, and described revert system comprises returning charge air compartment (12), U type valve (13) and returning charge mouth (18), and U type valve (13) is positioned at returning charge air compartment (12); The lower part outlet of cyclone separator (2) is communicated with returning charge air compartment (12); The returning charge mouth (18) of revert system is connected with burner hearth (1) bottom, and it is characterized in that: described combustion system includes oxygen-enriching device (10), and said oxygen-enriching device (10) is arranged on the outer wall in the middle part of the burner hearth (1) and with burner hearth (1) and connects; Supplemental oxygen is with combustion-supporting, to improve the efficiency of combustion of biomass fuel in burner hearth (1).
2. biomass circulating fluid bed direct combustion device according to claim 1; It is characterized in that: described oxygen-enriching device (10) comprises air separator (10a), the high-concentration oxygen bellows (10b) that link to each other successively; Air channel (10c) and nozzle (10d); Said air channel (10c) is provided with valve (10e); The entrance point of said air separator (10a) connects an airduct, and air separator (10a) separation of high-concentration oxygen gets into described high-concentration oxygen bellows (10b), and said nozzle (10d) is divided into two-layer up and down and inserts burner hearth (1) respectively with jet flow oxygen in burner hearth (1).
3. biomass circulating fluid bed direct combustion device according to claim 1; It is characterized in that: described first superheater is a middle temperature pendant superheater (4); The flue section of said flue between outlet of the top of cyclone separator (2) and middle temperature pendant superheater (4) is convergent flue (3), with raising the flue gas speed here of flowing through.
4. biomass circulating fluid bed direct combustion device according to claim 1; It is characterized in that: the returning charge air compartment (12) of described revert system is being arranged side by side two square air-distribution devices with place, said U type valve (13) opposite; Be respectively the loosening air-distribution device (14) of high temperature ash upstream chamber and the fluidisation air-distribution device (15) of downstream chamber; Described loosening air-distribution device (14) and fluidisation air-distribution device (15) are provided with two-layer blast cap, are respectively internal layer blast cap and outer blast cap, wherein; The internal layer blast cap is made up of a plurality of circular wind hole; A plurality of circular wind hole is arranged in a concentric circles, and outer blast cap also is made up of a plurality of circular wind hole, a plurality of circular wind hole be arranged in one square.
5. biomass circulating fluid bed direct combustion device according to claim 1; It is characterized in that: the returning charge mouth (18) of said revert system is obliquely installed; Has slanted angle γ between returning charge mouth (18) and the horizontal plane; This slanted angle γ between 20～30 °, the blanking platform that the bottom of said returning charge mouth (18) and burner hearth (1) junction has level, said returning charge mouth (18) is provided with material seeding outlet (16) in the direction towards burner hearth (1).
6. biomass circulating fluid bed direct combustion device according to claim 1; It is characterized in that: the turning flue section of said flue between reheater (5) and economizer (8) is provided with flue gas guiding device (6), and this flue gas guiding device (6) is made up of 3～5 flow deflectors.
7. according to each described biomass circulating fluid bed direct combustion device of claim 1 to 6; It is characterized in that: described feeding system comprises screw(-type) feeder (32), standpipe (27), defeated material air compartment (26) and the material blanking tube (21) that is communicated with successively; Said standpipe (27) vertically is provided with; The oblique setting of said material blanking tube (21); Said standpipe (27) is provided with the two-layer disturbance wind nozzle that is used in standpipe, spraying wind, is respectively ground floor disturbance wind nozzle (29) that is positioned at the upper strata and the second layer disturbance wind nozzle (28) that is positioned at lower floor, ground floor disturbance wind nozzle (29) horizontal arrangement; Second layer disturbance wind nozzle (28) is oblique to be provided with down, sprays into to have slanted angle α between angle and the horizontal plane.
8. biomass circulating fluid bed direct combustion device according to claim 7; It is characterized in that: said slanted angle α is between 30～40 °; The quantity of every layer of nozzle is four in the said two-layer disturbance wind nozzle; Be evenly distributed on standpipe (27) around, the jet apertures of second layer disturbance wind nozzle (28) is greater than the jet apertures of ground floor disturbance wind nozzle (29), the aperture of each layer jet apertures is identical.
9. biomass circulating fluid bed direct combustion device according to claim 7; It is characterized in that: be furnished with the air-cooled sleeve of stainless steel (24) on the said material blanking tube (21); And form sealed Heat Room (22) between material blanking tube (21) outer wall, be furnished with the fin (21a) that is beneficial to heat radiation on the outer wall of described material blanking tube (21), described air-cooled sleeve (24) is provided with air inlet (19) and air outlet (23); Described air inlet (19) is connected with an airduct; Air outlet (23) is connected with secondary air channel, and the tail end lower disposed of said material blanking tube (21) has material feeder (20), helps sending out of material.
10. biomass circulating fluid bed direct combustion device according to claim 7 is characterized in that: have slanted angle β between said material blanking tube (21) and the horizontal plane, this slanted angle β is between 60 °～90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201076926U CN202613429U (en) | 2012-03-20 | 2012-03-20 | Biomass circulating fluidized bed direct-burning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201076926U CN202613429U (en) | 2012-03-20 | 2012-03-20 | Biomass circulating fluidized bed direct-burning device |
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| CN202613429U true CN202613429U (en) | 2012-12-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628590A (en) * | 2012-03-20 | 2012-08-08 | 广东电网公司电力科学研究院 | Biomass circulating fluidized bed direct combustion apparatus |
| CN105627301A (en) * | 2016-03-16 | 2016-06-01 | 太原锅炉集团有限公司 | Circulating fluidized bed boiler for purely burning furfural residues |
| CN106678785A (en) * | 2017-02-16 | 2017-05-17 | 中国华能集团清洁能源技术研究院有限公司 | Lubricating air device for preventing coking of external bed of CFB boiler at high temperature |
| CN106979516A (en) * | 2017-05-27 | 2017-07-25 | 贵州新能源开发投资股份有限公司 | A kind of U-shaped composite separator suitable for CFBC |
| CN107062208A (en) * | 2017-05-27 | 2017-08-18 | 贵州新能源开发投资股份有限公司 | It is a kind of suitable for fluid bed Wu Du Sai Give device for coal |
-
2012
- 2012-03-20 CN CN2012201076926U patent/CN202613429U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628590A (en) * | 2012-03-20 | 2012-08-08 | 广东电网公司电力科学研究院 | Biomass circulating fluidized bed direct combustion apparatus |
| CN102628590B (en) * | 2012-03-20 | 2014-09-17 | 广东电网公司电力科学研究院 | Biomass circulating fluidized bed direct combustion apparatus |
| CN105627301A (en) * | 2016-03-16 | 2016-06-01 | 太原锅炉集团有限公司 | Circulating fluidized bed boiler for purely burning furfural residues |
| CN106678785A (en) * | 2017-02-16 | 2017-05-17 | 中国华能集团清洁能源技术研究院有限公司 | Lubricating air device for preventing coking of external bed of CFB boiler at high temperature |
| CN106979516A (en) * | 2017-05-27 | 2017-07-25 | 贵州新能源开发投资股份有限公司 | A kind of U-shaped composite separator suitable for CFBC |
| CN107062208A (en) * | 2017-05-27 | 2017-08-18 | 贵州新能源开发投资股份有限公司 | It is a kind of suitable for fluid bed Wu Du Sai Give device for coal |
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