CN101457927A - Shaft-rotating coal stirring boiler - Google Patents
Shaft-rotating coal stirring boiler Download PDFInfo
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- CN101457927A CN101457927A CNA2008101753633A CN200810175363A CN101457927A CN 101457927 A CN101457927 A CN 101457927A CN A2008101753633 A CNA2008101753633 A CN A2008101753633A CN 200810175363 A CN200810175363 A CN 200810175363A CN 101457927 A CN101457927 A CN 101457927A
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Abstract
The invention provides a pivot coal spreading boiler, belonging to an industrial boiler. The boiler combines the advantages of a grate furnace, a double-layered grate furnace, a coal tossing furnace and a chain furnace such as mechanical coal transportation, uniform fire coal spreading, multizone and multimode burning, sufficient burning, inferior coal adaptability, high heating efficiency, fast load adjustment and the like; and overcomes the defects of the furnaces. The invention has the characteristics of high efficiency, energy saving, environmental protection, and the like, and is very practical. The structure of the boiler comprises a pivot coal spreading horizontal boiler and a pivot coal spreading fluidized bed furnace and is composed by the combination of pivot coal spreading grates and general grates or a fluidized bed; and the pivot coal spreading grate comprises a fin arris, a pivot tube and vents. The best characteristic of the pivot coal spreading boiler is that the pivot coal spreading grate has functions of fire coal transporting, grinding and spreading; the boiler is provided with an upper grate layer and a lower grate layer with multiple burning modes such as grate firing, float firing, boiling and the like, the heating efficiency is high and the application range of the coal variety is wide; the rotating speed of the grate is adjustable, thus changing the coal supply quantity and adapting to the load change; furthermore, the rotation and production are simple, assembly is simple and fast and replacement is convenient and fast.
Description
Technical field
Industrial Boiler
Background technology
One, boiler combustion mode
(1), layer combustion
Fuel is distributed in the burning of carrying out on the fire grate with certain thickness, as long as air and coal seam good mixing, and certain ignition temperature is arranged, just can reach desirable burning, mix bad or lack of air, will imperfect combustion, efficiency of combustion is low, over-emitting black exhaust.
(2), suspension combustion
Fuel is sprayed into the burning of carrying out in the burner hearth with powdery, vaporific or gaseous state in company with air.Suspension combustion catches fire rapidly, and combustion reaction is complete, the thermal efficiency is high, and the ability that adapts to the external load variation is strong, and is strong to fuel tolerance.But solid fuel must be pulverized attrition process in advance.
(3), Boiling Combustion
Fuel under the effect of suitable flow velocity air, is shown the burning that the fluid boiling state carries out on ebullated bed.Be applicable to various coals, particularly colm,, but the granular size of coal cinder had certain requirement as bone coal, gangue etc.
(4), gasification, and combustion
Gasification, and combustion mainly is meant the coal that the drops into burner hearth directly burning of gasifying.
Two, combustion apparatus
(1), fixed grate
1, structure: fixed grate is made up of the strip fire bars usually, and minority is made up of tabular fire bars.
2, pluses and minuses
1), advantage:
1., ignition condition is superior.New coal bottom is heated by the high temperature of burning zone, and top is heated by the radiant heat of burner hearth flue gas and brick wall, and the very fast rising of temperature at first evaporates moisture, and that continues decomposites fugitive constituent and initial burning burning.
2., burning time abundance.
3., coal adaptability is strong.Because ignition condition is superior, burning time is sufficient again, so coal is subjected to the influence of moisture and volatile content little, generally can be very fast fire burns.
2), shortcoming: the labour intensity of operation operation is big, and burning shows periodically inharmonious, over-emitting black exhaust, reduces boiler thermal output.
(2), double-layer grate
1, structure: fire grate is arranged upper and lower two-layer in burner hearth.
2, burning feature: double-layer grate has the burning feature of fixed grate handwarmer and simple and easy gas burner concurrently.New coal is interrupted from upper furnace door and drops on the red-hot grate of upper fire-grating, through preheating, drying, after emitting volatile matter be fire burns, the last coal seam that high-temperature flue gas and unburnt volatile matter pass high temperature flows downward and enters the combustion chamber.
3, pluses and minuses
1), advantage:
1., coal is through the double-layer grate twice combustion, solid, heat loss due to unburned gases are little.Therefore, smoke abatement and dust control is good, has improved boiler thermal output.
2., because upper grate employing water-cooled makes the temperature of burning zone lower.
3., burning just often, chimney is over-emitting black exhaust not substantially, helps environmental protection.
2), shortcoming:
1., catch fire and combustion process slow, the fire grate thermic load is lower.
2., ignition condition is poor, coal accommodation is narrower.
4, the double-layer grate problem that is in operation and should be noted that:
1), the lower fire grating combustion efficiency depends primarily on the leakage coal situation of upper fire-grating, therefore, requires the stoker personnel that higher running technology is arranged.
2), enter the air quantity of combustion chamber, should satisfy the needs of going up the lower fire grating coal combustion respectively, supply the needs of the gas fuel burning that produces by upper fire-grating again.Therefore, should be at any time furnace grate ventilation be up and down adjusted according to the coal leakage quantity of upper fire-grating and volatile content.
(3), spreader stoker boiler
1, the structure of spreader stoker boiler
Usually by two kinds of structures, cooperate hand dump grate or reversing traveling-grate stoker by spreader feeder.Regulate the speed of throwing the coal rotor, can regulate the coal amount of throwing, change to adapt to boiler load.
2, the burning feature of spreader stoker boiler:
Spreader feeder is thrown coal and is burnt on fire grate.And ickings is owing to the effect of wind-force, at the furnace cavity suspension combustion.Therefore, belong to stratiform---suspension combustion.
Because ickings is thicker than coal dust, and is poor with Air mixing, because of ignition temperature requires height, the needed time of completing combustion is also long.The boiler that spreader feeder is housed does not generally have the front and back arch, and it is bad that air-flow stirs mixing, and flue gas flow is short, and it is improper to regulate as if burning, takes more carbon granule and flying dust out of from burner hearth easily, promptly decreases convection heating surface, and contaminated air reduces boiler thermal output again, wastes fuel.
3, the pluses and minuses of spreader stoker boiler
1), advantage:
1., coal is applied widely.
2., regulate flexibly, the ability that adapts to load variations is strong.
2), shortcoming:
1., to the granularity requirements height of coal, water content also will be controlled.Easy agglomerating obstruction when moisture in coal is too high; Gravity flow easily again can't normally move during hypohydration.
2., the spreader feeder workmanship requires high.
(4), traveling-grate stoker
The traveling-grate stoker profile is as belt conveyer, the main radiant heat that relies on furnace flame and arch that catches fire of coal, thereby top catching fire earlier, then progressively downwards and by after burning forward.In the front portion of fire grate, be new coal combustion area in preparation, mainly carry out the preheating and the drying of coal, then fugitive constituent is separated out and is taken fire.Do not need a lot of air in burning area in preparation and burning-out zone, adopt air zoning.Arrange chimney arch savings heat in the burner hearth, improve fire box temperature, quicken new coal and catch fire.The burning of chain furnace is carried out from top to bottom, belong to " single face catches fire ", thereby ignition condition is poor, and coal adaptability is bad.The traveling-grate stoker complex structure is made quite trouble of maintenance.
(5), ebullated bed
1, the structure of ebullated bed
The structure of ebullated bed mainly partly is made up of cloth wind system, boiling section and suspension section etc.
1), cloth wind system
The cloth wind system is made up of air compartment, air distribution plate and blast cap three parts.
2), boiling section
Boiling section claims boiling bed again, is the occupied burner hearth part of the bed of material and coal grain boiling, and the lower end shows the cylinder vertical section usually, and the upper end shows the taper diffuser, to reduce the flying dust drag-out.
The coal-feeding mode of fluidized bed furnace has two kinds of negative pressure coal supply and malleation coal supplies.The negative pressure coal supply is the feeder with belt coal-feeding machine or other patterns, and coal is sent into negative pressuren zone above the boiling section.This coal-feeding mode often increases the phosphorus content in the flying dust.
3), suspension section
Suspension section is meant the burner hearth part above the boiling section.Prolong the duff grain in the time of staying of suspension section, so that suspension combustion to the greatest extent.
2, the pluses and minuses of ebullated bed
1), the advantage of ebullated bed:
1., the adaptability to coal is strong.
2., strengthening heat transfer can be saved the heating surface steel.
3., body construction is simple, machining amount is less.
2), the shortcoming of ebullated bed:
1., because of raw coal pulverizing, screening, conveying and dedusting and use high pressure positive blower, all need power, so power consumption is higher.
2., buried pipe abrasion is serious, as not adopting the abrasionproof measure, pipe explosion accident takes place easily.
3., the flying dust amount is big, heat loss is more.
4., grit is seriously polluted, cleaner required high.
Summary of the invention
One, shaft-rotating coal stirring boiler structure
Shaft-rotating coal stirring boiler divides two kinds of structures: a kind of is to revolve axle to broadcast the coal stove deploying and close lower fire grating horizontal boiler (abbreviation revolve axle broadcasts coal horizontal boiler), revolves axle and broadcasts the coal stove deploying and close fluidized bed boiler (abbreviation revolves axle broadcasts the coal fluidized bed furnace).
Two kinds of boilers all have former and later two combustion chambers, revolve axle and broadcast coal stove row and run through two combustion chambers, all adopt the air zoning mode, continuously coal supply.The fire grate rotating speed can be regulated, and combustion chamber, front and back rotating speed is inconsistent, and preceding fast back is slow, precedingly helps the coal seam transmission soon, ickings broadcasts sowing, after help coal cinder fully burning on fire grate slowly.
Revolve axle and broadcast the general casting furnace grate of the common employing of lower fire grating of coal horizontal boiler, also shake fire grate, traveling-grate stoker.
Two, main combustion apparatus---revolve axle to broadcast the introduction that coal stove is arranged:
(1), revolve the structure that axle is broadcast coal stove row: as Fig. 1, Fig. 2,
By transmission mechanism, air-supply cooling body, revolve axle and form with pedestal mechanism, it is definite according to actual design to revolve a radical and fire grate length.
1, transmission mechanism: gear and gear drive or gear and chain drive
(1), gear and gear drive
Be fixed on gear and the gears engaged of revolving shaft end on the pedestal, the gear that revolves on the shaft gear drive pedestal that is driven by reductor rotates, and the axle that revolves of the gear driven back on the pedestal rotates.Realize that by that analogy the orientation of rotation, fire grate in the same way of revolving axle moves.The depth of engagement that shaft gear and fixed gear are revolved in adjustment can be regulated the height up and down that revolves axle, can adjust the gap of revolving axle.As Fig. 3,
(2), gear and chain drive
Every revolves axle and with side end two gears is arranged, per two adjacent gears have chain to link to each other, promptly first gear that revolves the axle outside driven by reductor, inboard gear revolves an inboard gear and links to each other with second, second outboard gears links to each other with the 3rd outside, so analogizes and realizes that the orientation of rotation, fire grate in the same way of revolving axle moves.Chain should have certain slackness, so that revolve moving up and down of axle, revolves the adjustment between centers crack.As Fig. 4,
2, air-supply cooling body:
Cooperate with pedestal with steel plate gear drive is sealed, form a box passage (abbreviation air channel), in this transporting cold wind, can cool off gear drive, and be assigned to each at this and revolve a central siphon, cooling central siphon inside, blow out by air vent, fully mix with coal cooling central siphon outside, assists burning.As Fig. 1, in (3) if the air-supply do not reach the cooling fire grate purpose, can change pumped (conveying) medium into cooling water, the cancellation air vent.
3, revolve axle and pedestal mechanism:
Revolving axle is connected by bearing with pedestal, being convenient to revolve axle rotates, the replacing convenience of noting the sealing of bearing and revolving axle, every bearing that revolves axle is arranged in the slide block, the bolt that connects slide block is arranged on the pedestal, regulate the height that bolt can adjusting slider, drive the bearing lifting and revolve axle, revolved the between centers crack since so just can regulate.When replacing was revolved spool, the band slide block took off together, was convenient to change and revolved axle.
(2), revolve the mechanism of action that axle is broadcast coal stove row:
Coal-fired being dropped down onto through coal bunker by coal bunker revolved axle and broadcast coal stove row, transmission speed reducer drives the gear rotation that first of fire grate revolves axle, drive whole fire grate by the transmission of gear and gear or gear and chain and rotate rolling backward, the coal that drops on the fire grate of front moves backward with fire grate, coal bunker is supplied with fire coal continuously, and keeps suitable thickness on fire grate; Drop on coal on the fire grate and be struck under the effect of fin rib and move backward, fine coal is scattered downwards by adhesive tape simultaneously, and rough coal is broken into ickings by front and back two fin rib squeezing mills, falls from revolving the between centers crack, air vent cooling fire grate, even distributing wind, send hot blast combustion-supporting; The coal cinder that is not ground, sows in preceding combustion chamber enters after-burner with fire grate, and corresponding the slowing down of fire grate speed of after-burner is so that the abundant completing combustion of coal cinder.
(3), the structure of revolving axle is formed and effect: fin rib, central siphon, air vent
There is the central siphon of fin rib, air vent to be referred to as to revolve axle with this.
1, revolve axle construction form as Fig. 5,
(1), fin rib: fin rib afterbody and central siphon are tangent, and along the slick and sly upwards transition of central siphon, become to finish after reaching certain height, and top and central siphon intersect vertically or be angled crossing.As Fig. 5, Fig. 6, in (7).Central siphon is with to revolve axle integrally manufactured, the number of fin rib and design is definite highly as required.
(2), central siphon: be hollow structure, two ends are identical with the air channel.The diameter of central siphon is determined according to the design concrete condition.As Fig. 5, Fig. 6, in (8).
(3), air vent: be positioned at the rib end and the central siphon intersection of fin rib, communicate with central siphon, the wind that blows out washes away central siphon.As Fig. 5, Fig. 6, in (9).
The size and shape of air vent is determined according to design ventilation and rate request.
(4), gear: revolve the end of axle, be used for transmission and revolve axle.As Fig. 5, in (10).
2, revolve the mechanism of action of axle: transmit, grind, sow fire coal, the cooling, combustion-supporting of ventilating.
(1), revolve spool coal conveyor reason: it is coal-fired that transmission is stirred in rotation, and coal-fired afterbody at the fin rib is revolving under axle rotates, by the fin rib progressively lifting dial to the next one backward and revolve axle.Main effect is that the lifting of fin rib moves.
(2), revolve a coal-grinding mechanism: two revolve axle rotates in the same way, shears mutually, and at high temperature coal is dried rough coal, destructive distillation is easy to grind, and is ground easily under the two fin ribs extruding of revolving axle, shear action.Main effect is that the shearing of two fin ribs moves.
(3), revolve axle and broadcast coal mechanism: coal can be leaked in two gaps of revolving axle, revolving a rolling fin rib adhesive tape coal dust is sowed by the gap, adjust the gap of revolving axle, the coal grain has this evenly to leak down, the coal grain granularity of leaking down is relevant with the gap, and the gap can be adjusted, and promptly leaks the also adjustable rectification of coal particle size and becomes control, row row revolves that to leak the coal gap between the axle certain, leaks coal and sows equably to following combustion space.Main effect is that the adhesive tape of fin rib moves.
(4), the central siphon air-supply is cooled off central siphon inside, heating air-supply simultaneously.
(5), air vent cooling fin rib, even distributing wind, the vertical section of air vent between fin rib and central siphon, direction of ventilation oppositely with revolve axle and tangential with revolve axle, reduce fan resistance, cooling central siphon outside.Preferably should arrange as Fig. 5,6.
3, revolve the assembling of axle
Revolve axle and the assembly building that revolves axle apart from extremely important, therefore will attach great importance to, revolve a fin rib top when assembling relatively when two, cause relative time apart from very little, firm the leakage coal is inhomogeneous once the sharply increase of spacing of staggering, so will make fin rib certain angle that staggers.Suppose that revolving a radical is n, the fin rib angle a=180 °/n that should stagger then, when n=4, a=45 °, as Fig. 7.Gap state when revolving 15 ° of axle rotations is as Fig. 8; Gap state when revolving 30 ° of axle rotations is as Fig. 9.
4, revolve the characteristics of axle
(1), make simple, direct casting.
(2), intensity, rigidity, hardness requires highly, at high temperature revolves the weight that axle not only will be born the coal seam, transmits coal again, simultaneously must the grinding coal cinder, therefore enough intensity, rigidity and hardness to be arranged.
(3), revolve axle and be heated cooling well: at first the cold wind of being sent here by bellows cools off central siphon inside; Its two because coal is dialled in its transmission coal seam, rotation, the coal grain is taken away certain heat, revolves axle rotation heat radiation in addition; Its three, coal leakage quantity is big, fire grate burning is not strong, thermic load is low; Its four, ventilate and below the fin rib, to blow over by air vent, cooling fin rib tangentially blows the brush central siphon, cooling central siphon outside.
(4), revolve the characteristics that axle is broadcast coal stove row
1, rotating speed can be regulated, and regulate coal-supplying amount, and combustion chamber, front and back rotating speed is inconsistent, and preceding fast back is slow, precedingly helps the coal seam transmission soon, the coal grain broadcasts sowing, after help coal cinder fully burning on fire grate slowly.
2, the fire grate gap can be regulated, and by the screw on the pedestal, can the compartment of terrain adjusting revolve the axle height, reaches and regulates the purpose of revolving the between centers crack.
3, transmission is simple and easy, makes simply, assembles simple and directly, and it is convenient to change.
4, fault is few in the running, and diastrophic possibility is arranged, but the easy access repair and replacement that go wrong.
5, reduce stoker personnel's the amount of labour, and continuity ground coal supply.
(5), the problem that is in operation and should be noted that:
1, controls the coal seam thickness of delivering coal.The coal seam is blocked up, is unfavorable for burning; The coal seam is thin excessively, and it is overheated easily to make the back fire grate lack coal.
2, the granularity of control coal.Coal overbreak, coal grain are too much, and coal is easy to leak too early; Coal is thick excessively, and the front coal leakage quantity that is bound to is few, is unfavorable for the lower fire grating burning.
3, the water content of coal is moderate.Moisture is few, and coal is revealed fast, and is inhomogeneous, and is unfavorable for the generation of coal gas; Washiness, burning are slowly.
4, the dispensing of air quantity influence burning and cooling.The quality of burning depends on coal and Air mixing, and therefore excess air coefficient will distribute air-supply, according to the corresponding adjustment of meeting of coal fugitive constituent and burning.
5, suitable fire grate rotating speed adapts to ground according to the height of the quality of coal and boiler load and regulates.
Three, revolve axle and broadcast the coal horizontal boiler
(1), revolve axle broadcast coal horizontal boiler structure such as Figure 10,
Fire grate divides upper and lower two-layer layout in burner hearth, revolve axle and broadcast fire grate (can be fixed grate, hand fire grate or traveling-grate stoker) as the coal stove deploying unification, and upper grate is to revolve axle to broadcast coal stove row.Former and later two combustion chambers are arranged, revolve axle and broadcast coal stove row and run through two combustion chambers, revolve axle and broadcast coal stove row front end in preceding combustion chamber, second half section is at after-burner, coal-firedly since so burnt up and down in preceding combustion chamber, at the after-burner layer combustion, just form three sections burnings, adopted the air zoning mode.The fire grate rotating speed can be regulated, and combustion chamber, front and back rotating speed is inconsistent, and preceding fast back is slow, precedingly helps the coal seam transmission soon, the coal grain broadcasts sowing, after help coal cinder fully burning on fire grate slowly.The front and back burner hearth all is furnished with heating surface.
(2), combustion process and burning feature
1, grate firing: coal relies on deadweight to fall on the fire grate from coal bunker, slowly moves from front to back with fire grate, and the height of coal flashboard can be regulated, and with the thickness of control coal, revolves axle and rotates loose coal seam, and air is sent into by revolving an air vent, and even distributing wind fully mixes with coal.Coal is separated out through radiant heat heat drying, dry distillation, fugitive constituent in the burner hearth in advance, fugitive constituent fire burns, coke burning subsequently, with upper furnace water-cooling wall heat-shift, the last coal seam that high-temperature flue gas that produces and the fugitive constituent that does not burn pass high temperature flows downward, and enters after-burner through smoke outlet window.
2, suspension combustion+grate firing: the rotation of revolving axle is progressively sowed to lower hearth ickings, arranges suitable air-supply at lower fire grating, makes that the coal dust under sowing burns at wind-force effect low suspension.Bigger ickings then slowly catches fire and falls, and drops on to burn away on the fire grate to most.
3, grate firing after-flame: the coal cinder that is not leaked down and grind on the fire grate, the burner hearth that is moved to back of furnace row in the axle effect of revolving burns away, and flows into the high-temperature flue gas of rear hearth and the fugitive constituent that do not burn burns to the greatest extent together with coal cinder by smoke outlet window.The heating surface at flue gas heating boiler rear portion.
(3), revolve the characteristics that axle is broadcast the coal horizontal boiler
1, this double-decker has been cancelled water-cooled grate, makes the temperature of burning zone moderate, and thermic load is good, revolve axle and rotate the coal seam of having loosened, air-supply mixes well with coal, and combustion-supporting effect is good, two radiation of burner hearth thermal ignitions up and down, the coal that fire grate catches fire behind the back fire grate by after ignite forward.Revolve axle and broadcast coal stove row upper end and can also arrange chimney arch savings heat, work the effect of igniting.
2, three sections multizones of coal layering burning, burning time is long, sufficient combustion, solid, heat loss due to unburned gases are little, and boiler thermal output is very high.
3, coal wide accommodation.Coal through former and later two combustion chambers, is ground again in transmission course on fire grate, and ignition condition is superior, and back fire grate special combustion coal cinder is so be suitable for burning low grade coal most.
4, fire grate is regulated sensitivity, and the ability that adapts to load variations is strong.The rotating speed of control fire grate changes defeated coal speed, broadcasts the also corresponding change of coal amount, changes air output, and it is adjusted to load.The change of air quantity simultaneously, the cooling of fire grate improves.
5, economical operation.At first, fire grate has the function of coal-grinding, and coal drying, destructive distillation, fugitive constituent are separated out easily and ground under the high temperature; Secondly, the ventilating hole ventilation direction oppositely with revolve axle and tangential with revolve axle, reduce fan resistance.
6, adopt air zoning, regulate in real time according to the required airflow of each burning zone.
7, burn just often, ratio of combustion is more abundant, and flying dust repeatedly filters through fire grate, and in the rear hearth sedimentation, over-emitting black exhaust, no flying dust do not help environmental protection.
8, stoker personnel's the amount of labour, intelligent degree height, load, air output change with the rotation of fire grate.
9, fire grate structure is simple, and cooling protection is good; Repair and replacement are convenient.
10, this boiler has been gathered the advantage of grate furnace, double-grate boiler, spreader stoker boiler, chain furnace etc., and has overcome their shortcoming, has characteristics such as efficient, energy-saving and environmental protection, burning inferior coal, and is very practical.
Four, revolve axle and broadcast the coal fluidized bed furnace
(1), revolve axle broadcast the structure of coal fluidized bed furnace such as Figure 11,
Revolve axle and broadcast the coal fluidized bed furnace former and later two combustion chambers are arranged, preceding combustion chamber is fluidized bed boiler roughly the same, the flue of being made up of the flue gas partition wall between two combustion chambers, front and back.Preceding combustion chamber is revolved axle and is broadcast coal stove row and be arranged in the upper strata, and ebullated bed is arranged in lower floor.Revolve axle and broadcast coal stove row and run through two combustion chambers, revolve axle and broadcast coal stove row front end in preceding combustion chamber, the second half section is at after-burner, coal-firedly since so burnt up and down in preceding combustion chamber, at the after-burner layer combustion, just formed three sections burnings, adopts the air zoning mode.The fire grate rotating speed can be regulated, and combustion chamber, front and back rotating speed is inconsistent, and preceding fast back is slow, precedingly helps the coal seam transmission soon, the coal grain broadcasts sowing, after help coal cinder fully burning on fire grate slowly.The front and back burner hearth all is furnished with heating surface.In the fire grate arranged beneath ash overflow port is arranged.
(2), combustion process and burning feature
1, grate firing: coal relies on deadweight to fall on the fire grate from coal bunker, slowly moves from front to back with fire grate, and the height of coal flashboard can be regulated, and with the thickness of control coal, revolves axle and rotates loose coal seam, and air is sent into by revolving an air vent, and even distributing wind fully mixes with coal.Coal is separated out through radiant heat heat drying, dry distillation, fugitive constituent in the burner hearth in advance, and fugitive constituent fire burns, coke burning subsequently.
2, Boiling Combustion: the rotation of revolving axle is progressively sowed to lower hearth ickings, arranges suitable air-supply at lower fire grating, the coal dust Boiling Combustion under the wind-force effect (being boiling section) under feasible the sowing.The lime-ash of after-flame has ash overflow port to flow out.
3, suspension combustion: the coal grain that blows out from fire grate and boiling section rises up into front furnace top suspension combustion to the greatest extent.The flue that flue gas and flying dust are formed through combustion chamber, front and back partition wall flows into after-burner, and flying dust is sedimentation in flue.
4, grate firing after-flame: the coal cinder that is not leaked down and grind on the fire grate, the burner hearth that is moved to back of furnace row in the axle effect of revolving burns away.
(3), revolve the characteristics that axle is broadcast the coal fluidized bed furnace
Have the advantage that ebullated bed is strong to the adaptability of coal, strengthening heat transfer can be saved the heating surface steel, body construction is simple, machining amount is less, the ebullated bed power consumption is higher, the flying dust amount is big, heat loss is more, the with serious pollution shortcoming of grit and overcome.
Description of drawings
The title of Figure of description and numbering correspondence is as follows:
Fig. 1, revolve axle and broadcast coal stove row wherein: (1), revolve axle (2), a pedestal (3), air channel
Fig. 2, revolve axle and broadcast coal stove row A-A view
Fig. 3, gear and gear drive be wherein: (4), revolve shaft gear (5), pedestal gear
Fig. 4, gear and chain drive be wherein: (6), chain
Fig. 5, revolve the axle wherein: (7), fin rib (8), air vent (9), central siphon (10), gear
Fig. 6, revolve an A-A view
Fig. 7, revolve the axle 45 ° of installation diagrams that stagger
Fig. 8, figure when revolving 15 ° of axle rotations
Fig. 9, figure when revolving 30 ° of axle rotations
Figure 10, revolve axle and broadcast the coal horizontal boiler wherein: (11), preceding combustion chamber (12), after-burner (13), revolve a fire grate (14), general fire grate
Figure 11, revolve the axle broadcast the coal fluidized bed furnace wherein: (15), preceding combustion chamber (16), after-burner (17), flue (18) revolve a fire grate (19), ebullated bed (20), ash overflow port
The specific embodiment
Revolve axle according to the specification manufacturing, be assembled into pedestal and revolve axle and broadcast coal stove row.Revolve that axle is broadcast coal stove row and horizontal boiler cooperates, be positioned at the boiler furnace middle part, the bottom is equipped with general fire grate, and manufactures to revolve and spool broadcast the coal horizontal boiler.Also can revolve axle and broadcast coal stove row, form and revolve axle and broadcasts the coal horizontal boiler having horizontal boiler transformation now, installing additional.Revolve that axle is broadcast coal stove row and ebullated bed cooperates, adopt and revolve axle and broadcast coal stove and come the boiling section top and deliver coal, promptly make to revolve and spool broadcast the coal fluidized bed furnace.
Claims (10)
1, revolve axle broadcast coal stove row by transmission mechanism, air-supply cooling body, revolve axle and form with pedestal mechanism, the air-supply cooling body is made up of air channel, central siphon and air vent, revolve axle and pedestal mechanism by revolve spool, pedestal and slide block form.Revolve axle and broadcast coal stove row and it is characterized in that reductor drives transmission mechanism, transmission mechanism drives and revolves the axle rotation, air-supply cooling body transporting cold wind; Revolving the between centers crack can regulate, and every revolves a rotating speed and can regulate.
2, the described transmission mechanism of claim 1 is made up of with the gear that revolves shaft end the gear that is fixed on the pedestal, it is characterized in that revolving shaft gear and stirs the pedestal gear, and the pedestal gear is stirred the back again and revolved shaft gear, and the rest may be inferred, realizes revolving the rotation in the same way of axle.
3, the described transmission mechanism of claim 1 also can be made up of two gears that revolve shaft end and chain, it is characterized in that revolving shaft gear and drives chain and rotate, chain drives the back again and revolves the shaft gear rotation, the rest may be inferred, realizes revolving the rotation in the same way of axle, and chain has lax slightly.
4, claim 1 described revolve the axle with pedestal mechanism in slide block, it is characterized in that revolving axle is connected with bearing in the slide block, slide block is connected with pedestal again, slide block can move up and down in pedestal, the bolt of connection slide block and pedestal is controlled it and is moved, and moving of slide block can be regulated the distance of revolving between the axle.
5, the described axle that revolves of claim 1 is made up of fin rib, central siphon, air vent and gear, and it is characterized in that: the fin rib shows half crescent shape, central siphon hollow, and air vent communicates with central siphon; Fin rib afterbody and central siphon are tangent, and along the slick and sly upwards transition of central siphon, reach certain height, and top and central siphon intersect vertically or angled intersecting; The central siphon two ends communicate with the air channel; Air vent is positioned at fin rib and central siphon intersection, and the wind that blows out washes away the central siphon outside.
6, the described axle that revolves of claim 5 is characterized in that revolving axle rotation and stirs fire coal, coal-fired afterbody at the fin rib, by the fin rib progressively lifting dial to the next one backward and revolve axle, transmission is moved coal-fired; Revolve axle and rotate in the same way, fire coal is sheared, pushed to the fin rib mutually, grinds fire coal; Revolve axle and roll, fin rib adhesive tape fire coal, fire coal is broadcasted sowing downwards by the gap, sows fire coal.
7, the described air vent of claim 5 is characterized in that air vent communicates with central siphon, and the fin rib is cooled off in air-supply, even distributing wind is combustion-supporting; Direction of ventilation with revolve a direction of rotation opposite and tangential with revolve axle, reduce fan resistance, cooling central siphon outside.
8, revolve by claim 1 is described that axle is broadcast as the coal stove deploying unification fire grate or ebullated bed constitutes shaft-rotating coal stirring boiler, it is characterized in that it has double-layer grate, upper grate is to revolve axle to broadcast coal stove row.
9, spool broadcast the coal horizontal boiler by described the revolving of revolving that axle broadcasts that fire grate is formed as the coal stove deploying unification of claim 1, it is characterized in that fire grate divides upper and lower two-layer layout in burner hearth, upper grate is to revolve axle to broadcast coal stove row, and lower floor's fire grate can be fixed grate, hand fire grate or traveling-grate stoker; Former and later two combustion chambers are arranged, revolve axle and broadcast coal stove row and run through two combustion chambers, adopt the air zoning mode, the front and back burner hearth all is furnished with heating surface; Can arrange chimney arch above broadcasting coal stove row revolving axle when the fire grate thermic load is low.
10, spool broadcast the coal fluidized bed furnace by described the revolving of revolving that axle broadcasts that the coal stove deploying closes that ebullated bed forms of claim 1, it is characterized in that having former and later two combustion chambers, the flue of forming by the flue gas partition wall between two combustion chambers, front and back, preceding combustion chamber is revolved axle and is broadcast coal stove row and be arranged in the upper strata, ebullated bed is arranged in lower floor, revolve axle and broadcast coal stove row and run through two combustion chambers, adopt the air zoning mode, front and back burner hearth and flue all are furnished with heating surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101753633A CN101457927A (en) | 2008-11-06 | 2008-11-06 | Shaft-rotating coal stirring boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101753633A CN101457927A (en) | 2008-11-06 | 2008-11-06 | Shaft-rotating coal stirring boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101457927A true CN101457927A (en) | 2009-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101753633A Pending CN101457927A (en) | 2008-11-06 | 2008-11-06 | Shaft-rotating coal stirring boiler |
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| Country | Link |
|---|---|
| CN (1) | CN101457927A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900342A (en) * | 2010-04-23 | 2010-12-01 | 李仕清 | Directional combustion-supporting air-cooled rotary furnace bar |
| CN103335320A (en) * | 2013-07-31 | 2013-10-02 | 彭小平 | Rotary air-cooling grate of boiler |
| CN104913316A (en) * | 2015-06-23 | 2015-09-16 | 中国环境科学研究院 | Ash discharging device of rubbish thermal decomposition gasification furnace |
| GB2534916A (en) * | 2015-02-05 | 2016-08-10 | Atkins John | Improved grate assembly for a gasifier |
-
2008
- 2008-11-06 CN CNA2008101753633A patent/CN101457927A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900342A (en) * | 2010-04-23 | 2010-12-01 | 李仕清 | Directional combustion-supporting air-cooled rotary furnace bar |
| CN103335320A (en) * | 2013-07-31 | 2013-10-02 | 彭小平 | Rotary air-cooling grate of boiler |
| GB2534916A (en) * | 2015-02-05 | 2016-08-10 | Atkins John | Improved grate assembly for a gasifier |
| CN104913316A (en) * | 2015-06-23 | 2015-09-16 | 中国环境科学研究院 | Ash discharging device of rubbish thermal decomposition gasification furnace |
| CN104913316B (en) * | 2015-06-23 | 2018-01-23 | 中国环境科学研究院 | A kind of slag-draining device of refuse pyrolysis gasification furnace |
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Open date: 20090617 |