CN204629510U - A kind of burning boiler igniter - Google Patents

Abstract

The utility model discloses a kind of burning boiler igniter, described igniter is located at the burner hearth bottom of burning boiler, described igniter comprises burning torch and ignition air duct, described burning torch is located in the sleeve that is connected with burner hearth bottom, ignition air duct is enclosed within the outside of sleeve, form wind chamber between ignition air duct and sleeve, wind chamber is connected with burner hearth bottom.Before and after the igniter chamber of burner hearth bottom, bilateral symmetry is furnished with a pair burning torch, and burning torch outer cover has ignition air duct, can improve ignition effectiveness, shortens the duration of ignition, and structure is simple, and safe and reliable, cost is low.

Description

A kind of burning boiler igniter

Technical field

The utility model relates to burning boiler technical field, especially relates to a kind of burning boiler igniter.

Background technology

At present the stalk of a lot of crops is all directly set fire to burning in farmland, and in farmland, direct crop straw burning contaminated air environment, is detrimental to health, and government forbids direct at farmland burning straw.

The straw biological energy is a kind of regenerative resource, and along with oil, natural gas equal energy source storage capacity reduce, biology regeneration energy resource is more and more concerned.Burning boiler is straw biological combustion energy conversion visual plant, and existing crop straw burning ignition of the boiler apparatus structure is complicated, and the duration of ignition is long.

Utility model content

Not enough for prior art, technical problem to be solved in the utility model is to provide a kind of burning boiler igniter, the object that structure is simple to reach, the duration of ignition is short.

In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:

This burning boiler igniter, described igniter is located at the burner hearth bottom of burning boiler, described igniter comprises burning torch and ignition air duct, described burning torch is located in the sleeve that is connected with burner hearth bottom, ignition air duct is enclosed within the outside of sleeve, form wind chamber between ignition air duct and sleeve, wind chamber is connected with burner hearth bottom.

Further, described igniter is a pair, is symmetricly set on burner hearth bottom both sides.

Described ignition air duct is connected with the outside airduct for air intake.

Be provided with pull bar between described ignition air duct and hearth outer wall, pull bar is positioned at above ignition air duct.

Described ignition air duct is provided with peephole.

Described burning torch and ignition air duct are all positioned at the below of burner hearth bottom air distribution plate, and burner hearth bottom is provided with an air inlet below air distribution plate.

Described air distribution plate is water-cooled distributor, and what water-cooled distributor was provided with bell-jar goes out blast cap.

The utility model compared with prior art, has the following advantages: before and after the igniter chamber of burner hearth bottom, bilateral symmetry is furnished with a pair burning torch, and burning torch outer cover has ignition air duct, can improve ignition effectiveness, shorten the duration of ignition, structure is simple, safe and reliable, cost is low.

Accompanying drawing explanation

Below the content expressed by each width accompanying drawing of this description and the mark in figure are briefly described:

Fig. 1 is the utility model boiler overall structure schematic diagram.

Fig. 2 is the top view of Fig. 1.

Fig. 3 is the utility model secondary air inlet structure schematic diagram.

Fig. 4 is the utility model flue accumulation prevention structure schematic diagram.

Fig. 5 is the utility model feed anti-backfire structural representation one.

Fig. 6 is along A-A sectional view in Fig. 5.

Fig. 7 is the utility model ignition device structure schematic diagram.

In figure: 1. feeder, 2. burner hearth, 3. igniter, 301. pull bar, 302. ignition air duct, 303. burning torch, 304. air inlets, 305. air distribution plate, 306. go out blast cap, 307. peephole, 4. feed anti-backfire mechanism, 401. inner layer pipe, 402. intermediate layer pipelines, pipeline outside 403., 404. burner hearth connectors, 405. air inlets I, 406. air inlets II, 407. air outlets I, 408. air outlets II, 5. secondary air mechanism, 501. lower air conduit, 502. upcast ventilation pipe, 503. bellows, 504. fixed head, 505. bracing frames I, 506. bracing frames II, 6. cyclone separator, 601. air channel, 602. bellows, 603. ash blowing mouth, 604. tip caps, 7. material returning valve, 8. afterbody first flue, in 801., temperature crosses device device, 802. high temperature superheater, 9. afterbody second flue, 901. low temperature superheater, 10. afterbody the 3rd flue, 1001. economizer, 1002. air preheater.

Detailed description of the invention

Contrast accompanying drawing below, by the description to embodiment, detailed description of the invention of the present utility model is described in further detail.

As shown in Figures 1 to 7, this crop straw burning fluidized-bed combustion boiler, comprise feeder 1, burner hearth 2, igniter 3, flue, material circulating system, secondary air mechanism 5, wherein, burner hearth 2 is vertically arranged, burner hearth 2 adopts support and hangs the mode combined and fixes, and burner hearth evaporating heating surface adopts fin panel casing, and the flue of afterbody adopts water-cooled bag wall.

Material circulating system comprises cyclone separator 6, the import of cyclone separator 6 is connected with burner hearth 2 top, cyclone separator 6 lower part outlet to be connected with burner hearth bottom by pipeline and on pipeline, to be provided with material returning valve 7, pipeline between material returning valve 7 and cyclone separator lower part outlet is horn mouth standpipe, big opening end and the cyclone separator lower part outlet of standpipe connect, and are connected between material returning valve with burner hearth bottom by feed back inclined tube.

Flue comprises afterbody first flue 8, afterbody second flue 9, afterbody the 3rd flue 10, cyclone separator 6 upper outlet is connected with afterbody first flue 8 top, be connected bottom afterbody first flue 8 with bottom afterbody second flue 9, afterbody second flue 9 top is connected with afterbody the 3rd flue 10 top.

Boiler adopts two high-temperature heat insulation cyclone separators, and be arranged between combustion chamber and afterbody convection pass, shell is manufactured by steel plate, liner is heat-insulating material and wearing-proof refractory material, cyclone separator top is volute shape, and bottom is taper, and abrasionproof heat-insulating material adopts drag hook, bitch, support to fix.

Burner hearth 2, cyclone separator 6 and material returning valve 7 three part constitute the core of CFBB, form material soft circulation circuit, and fuel mixes combining combustion with recycle stock in burner hearth, produce heat smoke, form Dual-Phrase Distribution of Gas olid.Gas-solid two stream in burner hearth on flowing.Bulky grain recycle stock falls after rise downwards at differing heights in this course, forms the Inner eycle of CFBB.All the other recycle stocks enter into cyclonic separation with heat smoke through furnace outlet, and separator carries out through separator purification air-flow, and the solid particle separated turns back to burner hearth through material returning valve, forms the outer circulation of boiler.The flue gas be cleaned then enters in back-end ductwork through separator outlet flue.Adopt low circulation fluidized bed combustion system, improve the availability of boiler, can steady in a long-termly run.

Igniter 3 is located at burner hearth bottom, and feeder is connected with the charging aperture of burner hearth bottom; Boiler adopts water-cooled distributor, and air distribution plate is cooled reliably.

Igniter 3 is symmetrically arranged a pair, is separately positioned on both sides before and after burner hearth bottom.Igniter 3 comprises burning torch 303 and ignition air duct 302, burning torch 303 is arranged in sleeve, ignition air duct 302 is enclosed within the outside of sleeve, sleeve is cylindrical drum, is namely enclosed within burning torch outside, forms wind chamber between ignition air duct and cylindrical drum, ignition air duct is connected with outside airduct, wind chamber and burner hearth bottom connecting place are provided with air port, and air port is the air outlet of annular, by the air port air-out of annular.Igniter is located at the below of air distribution plate, burner hearth below air distribution plate is connected with an air inlet 304, ignition air duct 302 is fixed by the pull bar 301 tilted, pull bar upper end is fixed on hearth outer wall, pull bar lower end is fixed on ignition air duct housing outer end, ensures the reliability that ignition air duct and burning torch are fixed.

The direction in air port, wind chamber is identical with the port direction of burning torch, and the fuel combustion that guarantee point fire-fighting goes out is abundant.Ignition air duct is connected with the outside airduct for air intake, and outside airduct is connected with outside blower fan.Ignition air duct 302 is provided with peephole 307, is convenient to observe burner hearth bottom ignition conditions.Burning torch 303 and ignition air duct 302 are all positioned at the below of burner hearth bottom air distribution plate, and an air inlet 304 is positioned at the below of the air distribution plate 305 of burner hearth bottom.

Be provided with air distribution plate bottom burner hearth 2, what between air distribution plate pipe, fin is furnished with bell-jar goes out blast cap 306, each go out blast cap by small diameter pipe and larger-diameter outer cover form.This go out blast cap have that fluidisation evenly, not blocks, do not wear and tear, installation, maintenance advantage easily.During due to starting ignition, in water cooled wind chamber, temperature is very high, so be laid with refractory material at water cooled wind chamber inner surface.

The ash that separated device traps, is sent by the standpipe of separator bottom and material returning valve and returns burner hearth and realize circulating combustion.Burner hearth bottom is provided with two slag-drip openings, by the control of bed drain purge size, within making bed pressure drop maintain zone of reasonableness, to ensure the running status that boiler is good.

Feeder 1 is arranged on the front wall centralized arrangement of burner hearth, stokehold is furnished with three material inlets, the fuel of certain particle size enters through batcher and is arranged in three feed pipes of front wall, only use two feed boilers also can oepration at full load, an other feed is arranged to be used for supplementing assisting and is added entrance, boiler has good adaptability, the change of applicable different stalk fuel.

Feed anti-backfire mechanism 4 is provided with between charging aperture bottom feeder 1 and burner hearth 2; Feed anti-backfire mechanism 4 comprises inner layer pipe 401, intermediate layer pipeline 402, outside pipeline 403, intermediate layer pipeline is enclosed within inner layer pipe outside, outside pipeline is enclosed within intermediate layer pipeline external, wind chamber in being formed between inner layer pipe and intermediate layer pipeline, form exogenous wind chamber between intermediate layer pipeline and outside pipeline, interior wind chamber is communicated with air inlet I 405, provides air intake to interior wind chamber by air inlet I, exogenous wind chamber is communicated with air inlet II 406, provides air intake to exogenous wind chamber by air inlet II.Inner layer pipe is provided with one group of air outlet I 407 by burner hearth end, and air outlet I arranges one week around inner layer pipe; Leave space by burner hearth end between intermediate layer pipeline and outside pipeline, space is air outlet II 408, and two air outlets are all dried in burner hearth, and form cooling structure.

Two air outlets are positioned at burner hearth connector 404 place, and two air inlet institute air intakes are cold wind, can cool burner hearth connector place, reduce temperature, air outlet blows to burner hearth, prevents burner hearth to feeder tempering, avoid straw burning in feeder, ensure operation stability and reliability.

Secondary air mechanism 5 arranges burner hearth both sides, and Secondary Air is sent into by front-back wall, and secondary air is cold wind; Secondary air mechanism comprises bellows and blast pipe, and blast pipe comprises upper blast pipe 502 and lower blast pipe 501, and bellows 503 are installed fixing by fixed head 504, and upper blast pipe supports fixing by bracing frame I 505, and lower blast pipe supports fixing by bracing frame II 506.Upper blast pipe air inlet is connected with bellows, and upper blast pipe air outlet is connected with the emulsion zone top of burner hearth, and lower blast pipe air inlet is connected with bellows, and lower blast pipe air outlet is connected with in the middle part of the emulsion zone of burner hearth; The air outlet of upper blast pipe and the outlet of lower blast pipe are all tilted to down.

Combustion air is divided into primary and secondary air, is sent into respectively by furnace bottom and front-back wall, can control fire box temperature in operation by regulating the proportioning of primary and secondary air air quantity.Water cooled wind chamber at the bottom of bed, the fluidizing agent as material in primary combustion wind and bed sends into combustion chamber, and Secondary Air divides two layers of layout along on stove height direction, to ensure be supplied to the enough combustion airs of fuel particle and participate in firing optimization at front-back wall; Meanwhile, the Secondary Air of hierarchical arrangement can be built the reducing atmosphere of local thus suppress the nitrogen oxidation in fuel in stove, reduces the generation of nitrogen oxide NOX, without the need to also meeting emission request to fume treatment.

Ignition temperature, lower than ash fusion point temperature, can avoid coking; Biomass fuel is after low-temperature burning, and fuel lime-ash activity is good, and some micronutrient levels are high, and lime-ash has good market prospects.

Be provided with accumulation prevention structure in the horizontal flue that cyclone separator is connected with burner hearth, accumulation prevention structure be can automatic rotation blowing blast cap.Accumulation prevention structure comprises air channel 601, bellows 602, ash blowing mouth 603, tip cap 604, outer end, air channel is connected with air intake header, and the inner, air channel is located at bottom horizontal flue, and bellows are located at the inner, air channel, can rotate relatively freely between bellows and air channel, the top of bellows is provided with tip cap, and bellows side wall is provided with ash blowing mouth, and bellows are cylindrical structure, the radial direction that ash blowing mouth departs from bellows is arranged, from ash blowing mouth blowout wind, bellows automatic rotation blows ash, prevents dust stratification.

Top in afterbody first flue 8 is provided with middle temperature, and device device 801, bottom are provided with high temperature superheater 802 excessively; Low temperature superheater 901 is provided with in afterbody second flue 9; Top in afterbody the 3rd flue 10 is provided with economizer 1001, bottom is provided with air preheater 1002.Medium temperature overheater is arranged in the high-temperature region of flue, and high temperature superheater is arranged in the middle warm area of flue, low to the material requirements of superheater, reduces costs.

The all horizontal band-wound rigid beam of the employing distortion that prevent inside and outside differential pressure effect from causing of the bag wall of burner hearth and afterbody first flue and afterbody second flue.Boiler furnace, afterbody first flue, afterbody second flue adopt overhung construction.Superheater system, cyclone separator, material returning valve, economizer and air preheater adopt supporting construction.Boiler is burner hearth, cyclone separator and material returning valve, afterbody first flue, afterbody second flue and the 3rd flue from front to back successively.

Boiler adopts balanced draft mode, and pressure balance point is positioned at furnace outlet, so combustion chamber is in malleation operating mode when running, in order to prevent smoke spillage, guarantees the sealing of combustion chamber, all doors, hole and restrain place through walls seal box or welded seal are all housed.

Afterbody first flue and afterbody second flue inside are equipped with and prevent the pulse explosion of dust stratification from blowing grey structure.Back-end ductwork is dust stratification not easily, and thermal energy conversion rate is high, stable.

By reference to the accompanying drawings the utility model is exemplarily described above; obvious the utility model specific implementation is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that design of the present utility model and technical scheme are carried out; or design of the present utility model and technical scheme directly applied to other occasion, all within protection domain of the present utility model without to improve.

Claims (7)

1. a burning boiler igniter, described igniter is located at the burner hearth bottom of burning boiler, it is characterized in that: described igniter comprises burning torch and ignition air duct, described burning torch is located in the sleeve that is connected with burner hearth bottom, ignition air duct is enclosed within the outside of sleeve, form wind chamber between ignition air duct and sleeve, wind chamber is connected with burner hearth bottom.

2. burning boiler igniter as claimed in claim 1, is characterized in that: described igniter is a pair, is symmetricly set on burner hearth bottom both sides.

3. burning boiler igniter as claimed in claim 1, is characterized in that: described ignition air duct is connected with the outside airduct for air intake.

4. burning boiler igniter as claimed in claim 1, is characterized in that: be provided with pull bar between described ignition air duct and hearth outer wall, pull bar is positioned at above ignition air duct.

5. burning boiler igniter as claimed in claim 1, is characterized in that: described ignition air duct is provided with peephole.

6. burning boiler igniter as claimed in claim 1, it is characterized in that: described burning torch and ignition air duct are all positioned at the below of burner hearth bottom air distribution plate, burner hearth bottom is provided with an air inlet below air distribution plate.

7. burning boiler igniter as claimed in claim 6, is characterized in that: described air distribution plate is water-cooled distributor, and what water-cooled distributor was provided with bell-jar goes out blast cap.