CN205424909U

CN205424909U - Semi -fluid combustor

Info

Publication number: CN205424909U
Application number: CN201620165222.3U
Authority: CN
Inventors: 刘心志; 朱强; 张后雷; 李家强; 乐兵; 朱江; 林凯
Original assignee: Sichuan Boyou Thermal Energy Equipment Co Ltd
Current assignee: Sichuan Boyou Thermal Energy Equipment Co Ltd
Priority date: 2016-03-04
Filing date: 2016-03-04
Publication date: 2016-08-03
Anticipated expiration: 2026-03-04

Abstract

The utility model relates to a semi -fluid combustor, its combustion chamber upper portion is the vaporizer, and the lower part is separated for end plenum and fluidization plenum, is the inclined grate between end plenum and the vaporizer, tiling grate and the dump grate laid for the interval between fluidization plenum and the vaporizer, the combustion chamber still is provided with the feeding portion and the gas spout of intercommunication vaporizer, and the gas spout is provided with secondary air nozzle, still includes all to be provided with corresponding tuber pipe with end plenum, fluidization plenum, secondary air nozzle, the tiling grate is provided with a plurality of hoods, and the hood side is provided with the gas outlet. Fuel landing on the inclined grate, be heated, catch fire, in tiling grate and the region that the dump grate belonged to, receive fluidization wind to influence realization fluidized combustion, high temperature flue gas and fuel mixture that the burning formed make progress through the outflow of gas spout, mix with the overgrate air, can further burn in receiving the heat facility. Adopt this combustor, fuel is difficult for the slagging scorification, and combustion processes is stable, and the lime -ash after the burning can be discharged through starting the dump grate.

Description

Half fluidised combustor

Technical field

This utility model relates to burner, is particularly suitable for half fluidised combustor with biomass solid particle as fuel that Industrial Boiler uses.

Background technology

Biomass solid fuel such as wood substance grain, has the features such as bulk density is high, granularity is regular, sulfur content is low, ash is low, fugitive constituent is high, when the coal-fired fuel as Industrial Boiler of replacement uses, has the remarkable advantages such as clean and effective.At present, the Wood pellets burner of main flow generally uses the fixed grate of tiling, fuel enters from burner base or sidewall, it is deposited on fixed grate and burns, use such design to frequently result in fuel and pile up skewness at grate bed, deslagging difficulty after burning, it is also difficult to realize burner and maximize.

Utility model content

Technical problem to be solved in the utility model is: provides a kind of half fluidised combustor, makes fuel be evenly distributed on grate, flameholding, and is easy to deslagging.

This utility model solves its technical problem and be the technical scheme is that

Half fluidised combustor, including combustor, upper space in described combustor is vaporizer, lower space in combustor is separated into end air compartment and fluidisation air compartment, it is inclined grate between air compartment of the described end and vaporizer, the tiling fire grate laid for interval between fluidisation air compartment and vaporizer and dump grate, the high-end position near Inner Wall of Combustion Chamber of inclined grate, the low side of inclined grate is near tiling fire grate and the region at dump grate place, described combustor is additionally provided with feeder and the combustion gas spout of connection vaporizer, described feeder leads to described inclined grate, described combustion gas spout is provided with overfiren air port, also include the end airduct connected with end air compartment, the fluidisation airduct connected with fluidisation air compartment, the secondary air channel connected with overfiren air port；Described tiling fire grate is provided with multiple blast cap, and described blast cap is the tubular of upper end closed, and blast cap lower ending opening connects described fluidisation air compartment, and blast cap side is provided with gas outlet.

Further, described blast cap upper end is the hemispherical blind end protruded.

Further, described feeder includes that feed bin, tube auger batcher, star-like flapper and the dispenser being linked in sequence, the outlet of described dispenser lead to described inclined grate, and the feed end of described tube auger batcher is less than its discharge end.

Further, the position that described combustor is positioned at above inclined grate is additionally provided with dog-house.

Further, described dispenser is provided with the slope structure that the port of export expands, dispenser connection vaporizer top above described inclined grate, described combustion gas spout connection vaporizer sidepiece above described tiling fire grate and dump grate region, airduct of the described end, fluidisation airduct, secondary air channel are provided with blower fan.

The beneficial effects of the utility model are: this half fluidised combustor, inclined grate, tiling fire grate and dump grate it is provided with in combustor, uniform landing is simultaneously on inclined grate for fuel, realization is heated, is dried, is caught fire, part fugitive constituent separates out, it is slipped to tile fire grate and the region at dump grate place with post fuel, the fluidized wind that fluidisation air compartment is sent here, through tiling fire grate and the eyelet of dump grate, and the gas outlet ejection of blast cap, make fuel realize fluidized combustion in this region, fuel remains fugitive constituent and separates out；High-temperature flue gas and flammable mixture that burning is formed upwards flow out through combustion gas spout, mix with secondary wind, can burn in such as boiler furnace further at heating device.Using this burner, fuel to be difficult to slagging scorification, and combustion process is stable, the lime-ash after fuel combustion periodically can realize deslagging by startup dump grate.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of half fluidised combustor of the present utility model；

Fig. 2 is the schematic diagram of blast cap；

In figure, reference is: feed bin 1, tube auger batcher 11, star-like flapper 12, dispenser 13, combustor 2, vaporizer 21, end air compartment 22, fluidisation air compartment 23, combustion gas spout 24, overfiren air port 241, dog-house 25, inclined grate 31, tiling fire grate 32, dump grate 33, blast cap 34, gas outlet 341, end airduct 41, fluidisation airduct 42, secondary air channel 43.

Detailed description of the invention

With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings:

nullHalf fluidised combustor，Including combustor 2，It is characterized in that，Upper space in described combustor 2 is vaporizer 21，Lower space in combustor 2 is separated into end air compartment 22 and fluidisation air compartment 23，It is inclined grate 31 between air compartment of the described end 22 and vaporizer 21，The tiling fire grate 32 laid for interval between fluidisation air compartment 23 and vaporizer 21 and dump grate 33，The high-end position near combustor 2 inwall of inclined grate 31，The low side of inclined grate 31 is near tiling fire grate 32 and the region at dump grate 33 place，Described combustor 2 is additionally provided with feeder and the combustion gas spout 24 of connection vaporizer 21，Described feeder leads to described inclined grate 31，Described combustion gas spout 24 is provided with overfiren air port 241，Also include the end airduct 41 connected with end air compartment 22，The fluidisation airduct 42 connected with fluidisation air compartment 23，The secondary air channel 43 connected with overfiren air port 241；Described tiling fire grate 32 is provided with multiple blast cap 34, and described blast cap 34 is the tubular of upper end closed, and blast cap 34 lower ending opening connects described fluidisation air compartment 23, and blast cap 34 side is provided with gas outlet 341.

As shown in Figure 1: this half fluidised combustor, fuel combustion process is carried out in combustor 2, the inner space of combustor 2, top is vaporizer 21, lower part is divided into end air compartment 22 and fluidisation air compartment 23, end airduct 41 supplies end wind for end air compartment 22, and end wind enters vaporizer 21 through inclined grate 31, and preheats on inclined grate 31 for fuel and burn.

Fluidisation airduct 42 supplies fluidized wind for fluidisation air compartment 23, fluidized wind partially passes through tiling fire grate 32 and dump grate 33 enters vaporizer 21, part sprays from the gas outlet 341 of blast cap 34, carries out fluidized combustion for fuel at tiling fire grate 32 and dump grate 33 region.

Inclined grate 31 is i.e. the fire grate being obliquely installed, its high-end position near combustor 2 inwall, low side is near tiling fire grate 32 and the region at dump grate 33 place, fuel enters combustor 2 from feeder and trickles down inclined grate 31, roll simultaneously along inclined grate 31, affected by high ambient temperatures, it is achieved be dried, catch fire, part fugitive constituent separates out, and finally rolls down to tile fire grate 32 and the region at dump grate 33 place.

The partial fluidised wind of fluidisation air compartment 23 penetrates the space of tiling fire grate 32 and dump grate 33 and blows to fuel, partial fluidised wind sprays from the gas outlet 341 of blast cap 34, fuel is formed impact, prevent fuel from piling up agglomerating, the fluidized wind that multiple blast caps 34 are sent, make fuel beat in this region, collide, form the fluidized combustion state of boiling sample.

After fuel combustion, the high-temperature flue gas of formation, flying dust, flammable fugitive constituent form mixed airflow and ascend in top vaporizer 21, oxygen in air is consumed further, fugitive constituent continues cracking, and the high-temperature combustible gas body mixture being consequently formed finally flows out from combustion gas spout 24.

Can connect heating device, such as boiler furnace outside combustion gas spout 24, the secondary wind that combustible gas mixture is sent here with overfiren air port 241 at combustion gas spout 24 mixes, and fully burns in heating device.The position that arranges of combustion gas spout 24 can be preferably connection vaporizer 21 sidepiece above described tiling fire grate 32 and dump grate 33 region, it is simple to lead to the heating device of outside.

Tiling fire grate 32 and the remaining big weight lime-ash in dump grate 33 region caking then can be discharged by starting dump grate 33.Dump grate 33 is formed by the sidewall of rotating shaft with surrounding structure such as combustor 2 and is rotationally connected, and dump grate 33 rotates to an angle, then the lime-ash caking that its top can be allowed to pile up falls, and thereafter lets out.

Tiling fire grate 32 and dump grate 33 are laid for interval, are i.e. the modes using tiling, spreads one piece of tiling fire grate 32, side spreads one piece of dump grate 33, side repaves one piece of tiling fire grate 32 until being paved with the region fluidized between air compartment 23 and vaporizer 21.

End airduct 41, fluidisation airduct 42 and secondary air channel 43 can be to use external equipment air feed, it is also possible to be to be respectively provided with blower fan.

Blast cap 34 is the tubular of upper end closed, blast cap 34 lower ending opening connection fluidisation air compartment 23, make fluidized wind can enter blast cap 34 and the gas outlet 341 from blast cap 34 side sprays, can be preferably that to be that the hemispherical blind end protruded, beneficially blast cap 34 are internal bear pressure in blast cap 34 upper end.

Feeder is for throwing in fuel to inclined grate 31, can be preferably the described feeder feed bin 1, tube auger batcher 11, star-like flapper 12 and the dispenser 13 that include being linked in sequence, described inclined grate 31 is led in the outlet of described dispenser 13, and the feed end of described tube auger batcher 11 is less than its discharge end.

As shown in Figure 1, fuel enters into combustor 2 through tube auger batcher 11, star-like flapper 12 and dispenser 13 from feed bin 1 successively, dispenser 13 is used for allowing fuel particle can be spread in inclined grate 31 the most uniformly, the version of dispenser 13 can be to realize any existing design of above-mentioned functions, can be preferably dispenser 13 be provided with the port of export expand slope structure, fuel particle is spread on inclined grate 31 in the scattered landing of slope structure.The position that arranges of dispenser 13 can be preferably connection vaporizer 21 top above described inclined grate 31.

Preferably, it is also possible to be that described combustor 2 is positioned at the position above inclined grate 31 and is additionally provided with dog-house 25.Dog-house 25 is grate igniting when burner cold start, such as, it may be that lay, to inclined grate 31, the material that ignites from dog-house 25, enter with a small amount of fuel of relief and be spread in and ignite on material, light the material that ignites, progressively add wind, charging, until flameholding.This burner can also use other sparking mode, the such as fuel on inclined grate 31 to be passed through High-temperature Bottom wind so that it is catches fire.

Claims

null1. half fluidised combustor，Including combustor (2)，It is characterized in that，Upper space in described combustor (2) is vaporizer (21)，Lower space in combustor (2) is separated into end air compartment (22) and fluidisation air compartment (23)，It is inclined grate (31) between air compartment of the described end (22) and vaporizer (21)，The tiling fire grate (32) laid for interval between fluidisation air compartment (23) and vaporizer (21) and dump grate (33)，The high-end position near combustor (2) inwall of inclined grate (31)，The low side of inclined grate (31) is near tiling fire grate (32) and the region at dump grate (33) place，Described combustor (2) is additionally provided with feeder and the combustion gas spout (24) of connection vaporizer (21)，Described feeder leads to described inclined grate (31)，Described combustion gas spout (24) is provided with overfiren air port (241)，Also include the end airduct (41) connected with end air compartment (22)，The fluidisation airduct (42) connected with fluidisation air compartment (23)，The secondary air channel (43) connected with overfiren air port (241)；Described tiling fire grate (32) is provided with multiple blast cap (34), described blast cap (34) is the tubular of upper end closed, blast cap (34) lower ending opening connects described fluidisation air compartment (23), and blast cap (34) side is provided with gas outlet (341).
Half fluidised combustor the most as claimed in claim 1, it is characterised in that described blast cap (34) upper end is the hemispherical blind end protruded.
Half fluidised combustor the most as claimed in claim 1 or 2, it is characterized in that, described feeder includes feed bin (1), tube auger batcher (11), star-like flapper (12) and the dispenser (13) being linked in sequence, described inclined grate (31) is led in described dispenser (13) outlet, and the feed end of described tube auger batcher (11) is less than its discharge end.
Half fluidised combustor the most as claimed in claim 3, it is characterised in that described combustor (2) is positioned at the position of inclined grate (31) top and is additionally provided with dog-house (25).
Half fluidised combustor the most as claimed in claim 4, it is characterized in that, described dispenser (13) is provided with the slope structure that the port of export expands, dispenser (13) connection is at vaporizer (21) top of described inclined grate (31) top, described combustion gas spout (24) connection vaporizer (21) sidepiece above described tiling fire grate (32) and dump grate (33) region, airduct of the described end (41), fluidisation airduct (42), secondary air channel (43) are provided with blower fan.