EP2249080A1 - Four pour combustibles extrêmes - Google Patents

Four pour combustibles extrêmes Download PDF

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Publication number
EP2249080A1
EP2249080A1 EP10155748A EP10155748A EP2249080A1 EP 2249080 A1 EP2249080 A1 EP 2249080A1 EP 10155748 A EP10155748 A EP 10155748A EP 10155748 A EP10155748 A EP 10155748A EP 2249080 A1 EP2249080 A1 EP 2249080A1
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EP
European Patent Office
Prior art keywords
furnace
fuel
oven according
agitator
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10155748A
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German (de)
English (en)
Inventor
Josef Kühlmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Priority claimed from DE200910003836 external-priority patent/DE102009003836A1/de
Application filed by Individual filed Critical Individual
Publication of EP2249080A1 publication Critical patent/EP2249080A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/24—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a vertical, substantially cylindrical, combustion chamber
    • F23G5/28—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a vertical, substantially cylindrical, combustion chamber having raking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F23B40/04—Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed from below through an opening in the fuel-supporting surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/10—Under-feed arrangements
    • F23K3/14—Under-feed arrangements feeding by screw
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/20—Rotary drum furnace
    • F23G2203/208—Rotary drum furnace with interior agitating members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/12—Waste feed arrangements using conveyors
    • F23G2205/121—Screw conveyor

Definitions

  • the invention relates to a furnace for the thermal utilization of solid fuel.
  • the utilization of so-called extreme fuels is problematic, ie fuels that are not such.
  • wood and other plant fibers are referred to as so-called control fuels.
  • the recovery of animal waste, such as chicken droppings or pig droppings can be problematic.
  • From the DE-OS 27 21 237 is a method for burning highly moist, mainly vegetable waste known, and a suitable, generic furnace.
  • the fuel is fed into the furnace chamber from below in the furnace center and forms a pour cone.
  • the bulk cone is aerated from below and forms radially from inside to outside drying, gasification, ember and ash zones.
  • the resulting carbonization gases are ignited by secondary air supplied from above. Further fuel being delivered causes the pour cone to remain in motion and gasified material is forced out to where it can be withdrawn from the ash zone.
  • a disadvantage of the known oven that it may come from the outside of the bulk cone blown secondary air to local fires, and in particular to a non-uniform heat distribution in the bulk cone. This allows the It is difficult to control the oven. In particular, a uniform, low-maintenance operation of the furnace is hardly achievable, which is a prerequisite for automatic control of the furnace.
  • the present invention has for its object to provide a furnace for the thermal utilization of solid fuel, which also allows the utilization of extreme fuels and the most uniform, low-maintenance operation of the furnace.
  • the invention proposes that the agitator is not only used for stirring, so as to mechanically homogenize the fuel, but at the same time also to intensify the process of thermal utilization and to even out.
  • oxygen discharge nozzles are provided on the agitator, so that the oxygen is supplied evenly within the combustion zone and, accordingly, the combustion is optimally supported everywhere within the combustion zone.
  • the material to be used thermally is called fuel because it supplies flammable gases that can be burned in the oven or elsewhere.
  • the corresponding proposed device instead of a furnace could also be referred to as a carburetor, which accordingly no combustion zone, but has a Glutzone or gasification zone, wherein subsequently but in favor of a uniform control, the device is referred to as an oven and its components are named as this corresponds to the combustion operation of the furnace.
  • the term firing zone is used instead of annealing or gasification zone, or the term firing is used, even if this process is based only on the fuel itself, ie its gasification, and no subsequent combustion of the gases in the furnace.
  • the oxygen supplied to the furnace in the combustion zone and optionally also elsewhere may be supplied in a technically particularly simple and cost-effective and safe manner in the form of ambient air and the atmospheric oxygen contained therein.
  • the agitator runs advantageous slowly, because its urgent action is not in a mixing of the fuel, but in the uniform supply of oxygen. Speeds of one revolution per minute or even slower are therefore advantageous, with tests revealing one revolution within three to four minutes to be advantageous.
  • an inclined plate may be provided on each impeller which slowly lifts the fuel as the impeller passes through the fuel so that the fuel is not fluidized but gently loosened and aerated.
  • the agitator blades may be oriented so that they scrape over the bottom of the oven with their forward edge in the direction of rotation, thus preventing them from running up on material that lies on the bottom of the oven and being lifted by this material.
  • the leading edges of the stirring blades can be ground in order to be able to scratch away the material sitting firmly on the bottom of the oven.
  • the distance of the air outlet openings automatically increases with increasing radius, so that the fuel present in the combustion zone experiences a particularly intensive heat development in the middle of the burning zone and cools to the outside, where only the ever-decreasing Residues are gassed on not yet gasified fuel or kept in glow.
  • the agitator breaks up localized embers that could otherwise cause the fuel, such as the pellet material, to literally bite together. This would be problematic both for the temperature control within the furnace, because a gas flow through these sixteengebackenen areas is difficult, and these sixteengebackenen areas may possibly be made with difficulty from the combustion zone.
  • the agitator causes a homogenization of the ember development, this homogenization is effected not only by the mechanical processing of the fuel, but also by the supply of oxygen everywhere.
  • This optimal support of the burning process is always proposed, regardless of how intensively the burning process should proceed.
  • the device referred to as the oven not for proper burning, but for blazing or gasifying the fuel used, with correspondingly reduced oxygen supply.
  • the process described as "burning" is not a true combustion, but a fumigation or gasification.
  • the furnace can be operated with a comparatively thin fuel layer.
  • This thin fuel layer provides good opportunities for automatic furnace control, because due to the comparatively small amount of fuel, which is currently currently in the combustion zone, the oven reacts quickly to corresponding influences of the automatic control, for example, at different speeds, with which the agitator is operated on different flow rates, with which correspondingly different amounts of fuel in the Furnace nachge organizert, or on a different levels of oxygen supply in the burning zone.
  • the thin fuel layer allows a likewise thin ember bed: the oven is for example by foreign material such.
  • the upper portion of the fuel layer is brought to glow and guest out.
  • oxygen from the agitator enters the fuel layer and fills the embers, while at the same time feeding fresh fuel from below and preventing the embers from gushing oxygen downwardly through the fuel layer.
  • stable conditions can be created in the furnace, which allow a uniform, low-maintenance and easy-to-influence, automatically controlled furnace operation.
  • these are advantageously used in the form of dried pellets, so that, for example, animal faeces are pelletized before it is thermally utilized in the proposed device.
  • the correspondingly dry pellets are then heated in a slow and even heating process so far that they outgas, so that the exiting combustible gases can be burned and can be used either for heating or for generating electrical energy.
  • combustible gases can either be drained off to operate a combustion device or engine elsewhere, or they can be collected in a container be stored to be used both at a different location and at a different time, or it may be provided downstream of the previously described part of the furnace within the same housing a combustion device, such as an air supply, so that the combustible gases within the Furnace can be burned.
  • a furnace construction in which the pellets are conveyed from bottom to top in the furnace.
  • an upright feed chute is provided, to which a furnace bottom adjoins radially outwardly above.
  • a combustion zone is provided in which the gasification of the fuel and optionally the combustion of the exiting gases takes place.
  • a partition In favor of possible defined conditions in the oven is provided to limit this combustion zone outward zirkumferent by a partition, so that the fuel is first held within the combustion zone in order to be fully utilized as possible thermally.
  • a slot is provided through which the outgassed material can be conveyed from the combustion zone. This is done automatically by the replenishment of the fresh fuel, which passes from the feed chute into the firing zone. This advancing fuel forces the outgassed fuel residue out through the slot of the bulkhead.
  • an annealing zone adjoins the firing zone, the annealing zone being bounded radially outward by a furnace wall where an outlet opening is provided so that the fuel can exit this part of the furnace after its thermal utilization through this outlet opening. Again, this can be done automatically by the advancing fuel.
  • the utilization of the fuel thus takes place in that the starting material for the extreme fuel is first dried and pelletized, so that it is present in this pelleted, dry state as a solid fuel. It is then heated, outgassed and the resulting gases can be burned, with an annealing of the fuel takes place until ultimately only ash is present.
  • a screw similar to a screw conveyor is provided in the feed shaft, so that a "screw conveyor” or “screw” is always mentioned below as a simplification and representative of other designs as well.
  • the conveying effect of the screw in the feed chute is of minor importance.
  • it can be provided, for example, via a material supply, which opens into the feed chute, to push the fuel material into the feed chute and, on the basis of this feed pressure, to ensure that the fuel material then rises in the feed chute and enters the combustion zone.
  • the screw in the feed chute advantageously serves for loosening and homogenization in order to distribute the pellets as uniformly as possible so that they are distributed as evenly as possible circumferentially as they pass from the feed chute into the region of the furnace bottom and the firing zone.
  • the worm is designed in the form of a split screw conveyor, that is, instead of having a worm gear extending through at least 360 °, two or more worm sections, for example two worm sections each of approximately 180 ° or 270 °.
  • a split screw conveyor that is, instead of having a worm gear extending through at least 360 °, two or more worm sections, for example two worm sections each of approximately 180 ° or 270 °.
  • an arrangement of two screw sections are mounted axially at the same height and offset from one another on the circumference of the axis. You can have the same slope.
  • the two respective ends of both screw sections can be arranged diametrically opposite one another on the axis, each section of the screw extending around half the circumference or around 3 ⁇ 4 of the circumference of the axis.
  • the gases released in the gasification, which escape the fuel constitute a fuel gas, which can be used spatially and / or temporally independently of the furnace as an energy source.
  • this fuel gas can be routed through lines to a location remote from the proposed furnace and burned, or it can first be stored in appropriate containers and later burned both temporally and spatially completely independent of the proposed furnace, so that in these cases as the furnace configured device is not operated as a combustion furnace, but as a gasifier due to a corresponding air duct.
  • the one device can be used exclusively as a gasifier and the other device can be used as a combustion furnace by the first resulting combustion gases are burned directly in the device.
  • the partition can be adjusted in height relative to the furnace bottom.
  • the furnace can be easily adapted to different operating parameters, for example, the pellet size, the desired fuel flow rate per unit time or the like.
  • these Once set parameters can be advantageously provided to leave the partition in the once set height above the bottom of the furnace and to perform an automatic control of the furnace operation by influencing other parameters.
  • the adjustable slit between the furnace bottom and the lower edge of the partition wall serves to force heavy material such as calcareous ash, or heavy admixtures such as sand and the like, outward through the advancing fresh fuel from the center of the furnace.
  • lighter material accumulates on the dividing wall and passes over the dividing wall, so that it strikes the heavier material already present there radially outside the dividing wall, which material has been moved outward below the dividing wall.
  • homogenizing elements which are stationary in the combustion zone can be arranged. While the agitator in turn causes a homogenization of the pellets as a mobile device, the fixed homogenizing elements serve to interrupt the movement of the pellets and thereby ensure homogenization of the pellets flowing past these homogenizing elements.
  • the flow of the pellets results, even without the arrangement of a stirrer, solely due to the delivery rate, is brought with the fresh fuel through the feed shaft up in the region of the combustion zone and the furnace bottom.
  • a cooling zone can adjoin the annealing zone, so that the annealed residual material of the fuel, ie substantially ashes, can cool down before it leaves the cooling zone via an outlet opening.
  • a passage opening can be provided in the furnace wall, through which the still hot fuel residues can pass out into the cooling zone.
  • oxygen can be supplied already in the feed chute, so that the fuel, when it passes from the feed chute into the combustion zone, is heated and begins to outgas, can be optimally gasified or incinerated, for example by the combustion of the escaping gases by the oxygen from Is supported at the beginning.
  • the fuel may be provided in the combustion zone means for supplying oxygen.
  • the combustion-promoting oxygen is released into the gases emerging from the fuel, so that their optimal and most complete combustion is supported.
  • the complete burning of the supplied fuel involves the combustion of the combustible gases released from the fuel.
  • this device which supplies oxygen to the combustion zone above the fuel, can be deactivated.
  • a valve may be provided which selectively releases or blocks a corresponding line carrying the oxygen, or a pump may be provided which pumps the oxygen through a suitable line carrying the oxygen and which can be selectively switched on or off.
  • the furnace can be designed without such a configuration, so that it can be referred to as a carburetor instead of a furnace in order to distinguish the two different embodiments.
  • a carburetor instead of a furnace in order to distinguish the two different embodiments.
  • This device for supplying oxygen can advantageously be driven in rotation about an upright axis, so that it can be driven together, for example, with the agitator and on this way the design of the furnace is simplified.
  • a Krälwerk which supports the discharge of the fuel residues provided there in the cooling zone.
  • this involves the burnt-out ashes of the fuel itself and, on the other hand, any heavy components in the fuel, such as sand, for example.
  • the Krälwerk ensures that, for example, depending on the ambient temperature and humidity ash does not stick, clumped or otherwise in the Cooling zone threatens to remain, but reliably reaches the outlet opening.
  • This Krälwerk can advantageously, again in structurally simple design of the furnace, be formed in that it is configured as a radially outwardly extended portion of the device with which oxygen is introduced above the fuel in the combustion zone.
  • the furnace wall may preferably have a slot, ie end above the furnace bottom, so that arms of the crating can extend through the slot to the oxygen introduction device.
  • 1 denotes a furnace as a whole, which serves for the thermal utilization of extreme fuels, which are produced for example on the basis of chicken manure or pig droppings.
  • the fuel in the form of dry pellets is stored in a material bunker 2 and from there via a pipe 3, in which there is a screw conveyor, in an upright feed pipe. 4
  • two screw sections 5 are provided in the feed tube 4, which are configured similar to a screw conveyor and are driven by an electric motor 6 by means of a chain 7.
  • the two screw sections 5 are arranged axially one behind the other and thus leave in the feed tube 4 a continuous space in axialler direction. do not serve the material promotion, but the homogenization of the fuel material.
  • the delivery is provided by the screw conveyor, which is located in the tube 3.
  • An oxygen supply takes place in the feed tube 4 from below.
  • a ventilation tube 8 is provided, wherein the amount of air can be regulated by means of a stopcock 9 or completely prevented.
  • the ventilation tube 8 and the housing of the furnace 1 including the feed tube 4 are designed to be fixed, with a corresponding frame is not shown in the drawings for reasons of clarity.
  • the screw sections 5 are rotatably mounted including a central axis 10, wherein a plastic pipe 11 is arranged with self-lubricating properties between the ventilation tube 8 and the central axis 10 and forms the bearing for the central axis 10, in which this turns.
  • the plastic tube 11 also serves to seal in order to guide the oxygen from the ventilation tube 8 through the plastic tube 11 and the hollow axis 10 configured as a tube.
  • the ascending fuel material passes from the feed tube 4 up into a combustion zone 12.
  • a central portion 14 of a furnace bottom 15 connects.
  • the fuel is conveyed upwards by the advancing fuel material in the feed tube 4 and homogenized and loosened by the screw sections 5.
  • the screw sections 5 end at a distance below the furnace bottom 15, so that the fuel material emerges as quietly and unmoved as possible at the upper end of the feed pipe 4 radially outward and distributed on this central portion 14 of the furnace bottom 15.
  • the distribution is supported by a stirrer 16, which is closer in Fig. 5 It has a collar 17 with which it is fastened on the central axis 10.
  • the sleeve 17 has air openings 18 through which the air flowing through the central axis 10 can flow into the impeller 19.
  • the stirring vanes 19 each consist of a plate 20 and of a ventilation tube 21, which is provided in the direction of rotation of the agitator 16 at the rear end of the plate 20 and has an air outlet slot 22 towards the rear.
  • the central axis 10 and thus the screw sections 5 and the agitator 16 runs relatively slowly, for example at a speed of half a revolution per minute, or slower. This speed is sufficient to distribute the pellets evenly over the circumference of the central portion 14 of the furnace bottom 15 within the combustion zone 12 and to evenly distribute air through the air exit slots 22 in the region of this combustion zone 12 in the fuel.
  • a ventilation of the fuel may be provided, for example, by 10 corresponding air outlet openings are provided in the central axis.
  • the fuel present in the combustion zone 12 exits due to the temperature levels present there and the escaping gases are burned, so that solely due to the supply of oxygen in the form of ambient air, a burning operation of the furnace 1 can be automatically maintained. Only to the start of the furnace must be a spark ignition.
  • the present in the combustion zone 12 pellets can be externally ignited, for example by means of an externally directed to the pellets flame, for example, wood chips or similar fuels can be scattered on the pellets in the oven 1 and then ignited to start the furnace and to favor the achievement of the operating temperature.
  • the firing zone is delimited by a dividing wall 23, which is adjustable in height relative to the furnace bottom 15, has a circular configuration and carries inwardly pointing round bars as homogenizing elements 24.
  • These homogenization elements 24 are obstacles to the moving pellets. A movement of the pellets takes place on the one hand by the agitator 16, and on the other hand only by feeding fuel from the supply pipe 4 into the burning zone 12 of the furnace becomes.
  • the furnace bottom 15 has an offset, so that the central portion 14 is arranged lower than the remaining part of the furnace bottom 15. This offset extends the partition wall 23 upwards, so that in the combustion zone 12, a layer thickness of fuel pellets builds up to the homogenizing elements 24 ranges.
  • these homogenizing elements 24 can effectively influence the moving pellets and promote as uniform a burning behavior as possible.
  • the pellets pass from the firing zone 12 radially outwards into an annealing zone 25, which adjoins the dividing wall 23 radially on the outside.
  • the pellets pass through a slot, which results from the height adjustment of the partition wall 23 relative to the furnace bottom 15, and possibly also beyond the upper edge of the partition wall 23 outwardly in the region of Ausglühzone 25.
  • Above the pellets ends the central axis 10th It carries near its upper end a means 26 for supplying oxygen, wherein the oxygen passes through the central axis 10 up to the device 26.
  • the device 26 is seen from below in FIG Fig.
  • the Ausglühzone 25 is bounded radially outwardly by a furnace wall 30 which forms a hood 32 together with a lid 31, which is held with a plurality of C-shaped holders on the furnace bottom 15, so that below the furnace wall 30 results in a slot.
  • the furnace bottom 15 extends beyond the circumference of the hood 32 out to the outside and there forms a cooling zone 34 for the annealed fuel, wherein the cooling zone 34 is limited by a peripheral wall ring 35.
  • the wall ring 35 has an outlet opening 36 through which the fuel residues pass out of the oven 1.
  • the Krälwerk 37 is formed by two elongated pipes 27, at the outer arms, in particular from the Fig. 2 and 6 becomes clear, profile strips 38 extend downward, carrying at its lower end Kratzmannn 39, which in turn are provided at the radially outer end with a curb 40.
  • Fig. 7 is a second embodiment of a screw conveyor shown, the partitions 5 differently than in the embodiment of Fig. 2 are not axially arranged one behind the other, but axially at the same height, and instead circumferentially offset from each other. Both sections 5 each extend only around a part of the circumference, namely by 180 °. By this arrangement of the screw sections 5, a thorough mixing and homogenization of the ascending in the feed tube 4 material is effected without the material to to promote fast upwards.
  • the two upper and lower ends of both screw sections 5 are located on the axis 10 each diametrically opposite.
  • Fig. 8 is a third embodiment of a screw conveyor shown, the partitions 5 differently than in the embodiment of Fig. 7 do not extend 180 ° of the circumference of the axis 10, but by 270 °.
  • the stirring blades 19 of the agitator 16 are designed as folded plates, so that the ventilation tube is folded as a square tube and integrally connected thereto, from the same sheet metal blank, the plate 20.
  • the air outlet slots 22 have been lasered into the sheet metal blank before it was folded to the impeller 19.
  • two opposite of the four stirring blades 19 are in the third embodiment of Fig. 8 designed as a short or as a long paddle 19, which will be discussed later in more detail.
  • the long impellers 19 are sized so long that they extend radially beyond the partition wall 23 addition. Thus, firstly, they can even out the material located there, and secondly, by means of correspondingly long or many air outlet slots 22, they can also bring about, as far as possible, a complete thermal utilization of the material located there, radially outside the dividing wall 23.
  • the proposed device is operated as an oven or as a carburetor, so if the fuel used to be gasified or burned, can be effected by this air supply outside of the partition wall 23, the gasification or combustion material there, which is not fully gasified or burned.
  • Fig. 9 shows a second embodiment of a proposed furnace, with the cover removed, the furnace of this embodiment is not used for burning the fuel, but for gasifying the fuel, so that this furnace can also be referred to as a carburetor. He is compared to the first embodiment simpler structure and more economical to produce. For the sake of linguistic simplification, components which correspond in their function to the components of the first embodiment are identified by the same terms and with reference numerals.
  • a gasifier is in this furnace above the agitator 16, no upper means 26 for oxygen supply as in the embodiment of Fig. 1 to 4 provided, so that a combustion of the resulting combustible gases does not occur and, accordingly, the energetic utilization of the fuel within this furnace is not as complete as in the furnace Fig. 1 to 4 , Rather, the combustible gases can be withdrawn through an outlet, which may be provided, for example, in the hood 32, which through the furnace wall 30 and the in Fig. 9 lid 31, not shown, is formed.
  • the furnace bottom 15 of Fig. 9 is just. Its central section 14, the furnace of the Fig. 1 to 4 forms the bottom of the combustion zone 12, the furnace is the Fig. 9 not deeper than the remainder of the furnace bottom 15. In this embodiment, it is bounded and defined by the partition wall 23, and in the combustion zone 12 the fuel is exhausted, but no combustion of the gases takes place.
  • the partition 23 is at the furnace of Fig. 9 fastened by means of holders 43 to the furnace wall 30.
  • the holders 43 outside the dividing wall 23 have a homogenizing effect for the material located there, similar to the homogenizing elements 24, which are provided radially inside the dividing wall 23.
  • This homogenization effect as complete as possible gasification of the fuel is supported, which is located in the annealing zone 25, as possible all parts of the material are circulated and material components that are not completely outgassed with hot material or with glow in Come compound and thereby outgas even these shares in this Ausglühzone 25.
  • the oven of Fig. 9 has the agitator 16 in the embodiment of Fig. 8 on.
  • the short impellers 19 run within the central portion 14, while the long impellers 19 extend radially further outwardly below the dividing wall 23. Due to the fact that both the short and the long stirring blades 19 have air outlet slots 22 in the region of the central portion 14, and due to the comparatively short distances between two successive stirring blades 19, intensive glowing and as complete as possible outgassing of the entire fuel located there takes place in the central portion 14 ,
  • the long stirring blades 19 also have air outlet slots 22 outside the central portion 14. Since only two of the four blades 19 are designed to be long, and since with increasing radius, the distance between the two long blades 19 in the Ausglühzone 25 is greater, there is a comparatively low oxygen input, based on the amount of fuel present there. However, this low oxygen input is sufficient to keep hot material in glow, so that in the Ausglühzone 25, the remaining, complete outgassing of the not fully outgassed or annealed fuel components can be done.
  • the material is annealed and outgassed, so that here is the cooling zone 34 for the annealed fuel in the furnace 1.
  • the long impellers 19 have extensions in the form of crimping plates 42, which extend into the cooling zone 34, so that together with the upper device 26 for supplying oxygen and the attached Krältechnik 37 deleted.
  • the crimping plates 42 convey the ash, which is located in the cooling zone 34, to outlet openings 36, which are in this Embodiment not in the furnace wall, but in the furnace bottom 15 are.
  • a single such outlet opening 36 is shown as a circular bore, wherein a plurality of differently shaped outlet openings 36 may be provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Solid-Fuel Combustion (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
EP10155748A 2009-04-28 2010-03-08 Four pour combustibles extrêmes Withdrawn EP2249080A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910003836 DE102009003836A1 (de) 2009-04-28 2009-04-28 Ofen für Extrem-Brennstoffe
DE102009034029 2009-07-21

Publications (1)

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EP2249080A1 true EP2249080A1 (fr) 2010-11-10

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WO (1) WO2010124670A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104848223A (zh) * 2015-05-27 2015-08-19 苏州科锐恒机械科技有限公司 一种垃圾焚烧炉
WO2021018486A1 (fr) 2019-07-26 2021-02-04 Alzchem Trostberg Gmbh Utilisation d'une composition pour réduire la teneur en humidité et en azote de selles de volaille

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5945156B2 (ja) * 2012-04-20 2016-07-05 株式会社Ｍ＆Ｗ 下水汚泥の処理装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1857354A (en) 1926-07-29 1932-05-10 William B Chapman Underfeed mechanism for fuel beds
US1888586A (en) 1928-05-10 1932-11-22 William B Chapman Firebed agitating mechanism
DE2151136A1 (de) 1971-05-26 1972-12-14 Tomoyuki Okumura Muellverbrennungsofen
DE2721237A1 (de) 1976-05-21 1977-12-01 Berger Otto Kesselfabrik Kg Verfahren zur verbrennung von stark feuchten, vornehmlich pflanzlichen abfallbrennstoffen und verbrennungsanlage zur durchfuehrung des verfahrens
US5138957A (en) 1991-05-15 1992-08-18 Biotherm Energy Systems, Inc. Hot gas generation system for producing combustible gases for a burner from particulate solid organic biomass material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1857354A (en) 1926-07-29 1932-05-10 William B Chapman Underfeed mechanism for fuel beds
US1888586A (en) 1928-05-10 1932-11-22 William B Chapman Firebed agitating mechanism
DE2151136A1 (de) 1971-05-26 1972-12-14 Tomoyuki Okumura Muellverbrennungsofen
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104848223A (zh) * 2015-05-27 2015-08-19 苏州科锐恒机械科技有限公司 一种垃圾焚烧炉
WO2021018486A1 (fr) 2019-07-26 2021-02-04 Alzchem Trostberg Gmbh Utilisation d'une composition pour réduire la teneur en humidité et en azote de selles de volaille

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