EP0175407B1 - Appareil pour doser et souffler une matière combustible dans un four - Google Patents

Appareil pour doser et souffler une matière combustible dans un four Download PDF

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Publication number
EP0175407B1
EP0175407B1 EP85201365A EP85201365A EP0175407B1 EP 0175407 B1 EP0175407 B1 EP 0175407B1 EP 85201365 A EP85201365 A EP 85201365A EP 85201365 A EP85201365 A EP 85201365A EP 0175407 B1 EP0175407 B1 EP 0175407B1
Authority
EP
European Patent Office
Prior art keywords
furnace
combustible material
blowing
volume
metering
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.)
Expired
Application number
EP85201365A
Other languages
German (de)
English (en)
Other versions
EP0175407A1 (fr
Inventor
Johannus Theodorus Willibrordus Windt
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.)
ESDEX V.O.F. TE AMSTERDAM.
Original Assignee
Esmil BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Esmil BV filed Critical Esmil BV
Priority to AT85201365T priority Critical patent/ATE34037T1/de
Publication of EP0175407A1 publication Critical patent/EP0175407A1/fr
Application granted granted Critical
Publication of EP0175407B1 publication Critical patent/EP0175407B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
    • 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
    • F23G5/44—Details; Accessories
    • F23G5/442—Waste feed arrangements
    • F23G5/444—Waste feed arrangements for solid waste

Definitions

  • the invention relates to apparatus for metering and blowing a combustible material into a furnace, e.g. a cement kilm.
  • a combustible material may be a material reclaimed from domestic refuse (RDF) for example a loose non-compressed combustible material reclaimed from domestic refuse, mainly comprising paper and plastics, known as "fluff".
  • RDF domestic refuse
  • fluff loose non-compressed combustible material reclaimed from domestic refuse
  • RDF Refuse Derived Fuel
  • pellets the combustible material is compressed to a granular material of a relatively high density.
  • Fluff is loose material, mainly comprising paper and plastics with a maximum size, e.g. 200 mm, determined by a grinding process preceding the reclamation thereof.
  • Fluff has a low density and forms a resilient mass which can be compressed to bales.
  • US-A-2 011 133 One possible method of feeding combustible material, in this case pulverized coal, into a furnace is illustrated in US-A-2 011 133 where the coal is metered from a hopper by a rotating compartment feeder opening below into a venturi which is energized by a fan and connects directly into a pneumatic conveying line leading to the furnace.
  • the hopper includes agitators to ensure that the compartments of the feeder are filled.
  • FR-A-2 500 122 shows in Fig. 1 an inclined conveyor which lifts combustible material in the form of lumps, e.g. wood, maize cobs, straw balls, into a chute down which they feed by gravity into a furnace.
  • the conveyor has projecting bars to catch the material.
  • a rotating compartment valve may be provided in the chute.
  • US-A-3 387 574 and US-A-4 377 117 both describe an apparatus for metering and blowing combustible material into a furnace, having a volume-metering device for the material, which supplies the material to a rotating compartment valve for the material which opens downwardly into a conduit for transport of the material to the furnace and blowing it into the furnace, which conduit is energized by a fan.
  • the object of the invention is to provide apparatus for metering and blowing combustible material into a furnace, which can handle a variety of material, especially but not exclusively the fluff described above.
  • the invention is set out in claim 1.
  • the compartments of the upwardly inclined belt conveyor are formed by catch plates at right angles to the belt direction and the belt runs at an angle a in the range 30° to 80° to the horizontal.
  • pellets can be metered by this preferred embodiment, it is especially suitable for volume metering of combustible material in the form of fluff, then metering apparatuses already known are used, such as for instance a horizontal conveyor belt and a wiping device, like a doctor blade, by which the level of the combustible material on the conveyor belt is controlled, the quantity of fluff which is metered is to a large extent dependent on the instantaneous properties of the fluff such as its density and compressibility.
  • the combustion value of RDF is, as a rule, not constant but varies depending on the kind of RDF, and also on its origin, the season of the year etc.
  • the speed of the belt conveyor is adjustable, so that the supply rate of RDF to the furnace can be controlled.
  • the capacity of the rotating compartment valve is considerably larger than the capacity of the volume metering device. As a consequence, clogging is prevented.
  • the venturi has its axis located at right angles to the axis of rotation of the rotating compartment valve. This improves the regularity of supply of RDF to the furnace.
  • the invention provides advantages in particular in the metering and blowing of fluff into a cement kiln, but is not limited thereto, and an apparatus of the invention can be capable of handling a variety of materials.
  • the invention can just as well be applied to the alternating burning of fluff and RDF pellets in a cement kiln, or to the burning of RDF pellets only, or to the burning of another combustible material such as peat or lignite.
  • the invention can also be applied to the burning of a combustible material in a different kind of furnace, for instance a travelling grate furnace or a fluidized bed furnace.
  • the supply of the combustible material is indicated, for the specific case in which fluff compressed in bales 1 is processed.
  • the bales move on a supply roller conveyor 15 and are subsequently lifted by means of an inclined belt 2 from which they pass into a mill 3 via a hopper 16. If there is only a short distance between a refuse separation apparatus and the furnace, the fluff reclaimed from domestic refuse can alternatively be supplied in bulk.
  • the loose material obtained from the mill 3 is collected in a storage bin or bunker 4 and removed therefrom with a volume metering device 5 which comprises an upwardly inclined plate belt 6, on which compartments 7 are mounted.
  • the compartments are formed by catch plates 8 arranged at right angles to the plate belt and thus to the direction of movement of the upward run of the plate belt, which is an angle a in the range 30° to 80° to the horizontal.
  • the ⁇ f quantity of combustible material removed from the bin 4 by each compartment and thus the rate of removal corresponds to the size of the compartments and the angle of repose of the combustible material.
  • the material removed from the bin 4 by the volume metering device 5 is discharged into a hopper 9, from which a rotating compartment valve or rotor lock 10 is fed.
  • the volume metering device has a casing 18 connected to the hopper 9. Below the rotor lock 10, there is a venturi 11 in open connection with the outlet side of the rotor lock 10.
  • the venturi 11 is energized by a fan 12.
  • This pipeline 14 runs to the furnace 17, which is indicated schematically. In this way, pneumatic transport and blowing into the furnace 17 of the combustible material take place.
  • the speed v of the plate belt 6 and the size of the compartments 7 which together determine the capacity of the volume metering device 5 and the rotating speed of the rotor lock 10 and the size of the compartments 13 are chosen so that the capacity of the rotor lock 10 is, at all times, considerably larger than the capacity of the volume metering device 5. As a consequence, clogging is prevented.
  • the speed of the plate belt 6 is adjustable by a control, so that the rate of supply of combustible material to the furnace can be controlled.
  • the axis of the venturi 11 is arranged at right angles to the axis of rotation of the rotor lock 10, so that a regular supply of combustible material to the furnace is obtained. Also, the rotor lock 10 discharges vertically above the venturi 11, which promotes the falling of combustible material into the air flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Claims (4)

1. Appareil destiné à doser et à souffler une matière combustible dans un four, comportant un dispositif (5) de dosage de volume pour la matière, lequel délivre la matière à une vanne rotative (10) à alvéoles destinée à la matière, et s'ouvrant vers le bas dans un conduit (14) destiné au transport de la matière jusqu'au four et à la souffler dans le four, ledit conduit étant animé par un ventilateur (12) caractérisé en ce que le dispositif de dosage de volume est une bande transporteuse (6) inclinée qui porte des compartiments (7) destinés à enlever la matière combustible d'un récipient (4) de stockage et en ce que la vanne rotative à alvéoles destinée à la matière s'ouvre vers le bas dans un venturi (11) qui est relié au conduit (14).
2. Appareil selon ia revendication 1, dans lequel les compartiments (7) sont formés par des plaques collectrices (8) qui s'étendent à angle droit par rapport à la direction du mouvement de la bande transporteuse, et que la bande transporteuse, au moins dans la partie de son trajet où elle extrait la matière du récipient (4) de stockage, est inclinée avec un angle de l'ordre de 30° à 80° par rapport à l'horizontale.
3. Appareil selon la revendication 1 ou la revendication 2, dans lequel la vitesse de la bande transporteuse (6) est réglable.
4. Appareil selon l'une quelconque des revendications précédentes, dans lequel la capacité d'écoulement en volume de la vanne rotative (10) à alvéoles est conçue pour être sensiblement plus forte que celle du dispositif (5) de dosage de volume.
EP85201365A 1984-09-03 1985-08-30 Appareil pour doser et souffler une matière combustible dans un four Expired EP0175407B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85201365T ATE34037T1 (de) 1984-09-03 1985-08-30 Vorrichtung zum dosieren und zum einblasen von einem brennstoff in einen ofen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8402675 1984-09-03
NL8402675A NL8402675A (nl) 1984-09-03 1984-09-03 Inrichting voor het doseren en in een oven inblazen van een brandbaar materiaal.

Publications (2)

Publication Number Publication Date
EP0175407A1 EP0175407A1 (fr) 1986-03-26
EP0175407B1 true EP0175407B1 (fr) 1988-05-04

Family

ID=19844399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85201365A Expired EP0175407B1 (fr) 1984-09-03 1985-08-30 Appareil pour doser et souffler une matière combustible dans un four

Country Status (4)

Country Link
EP (1) EP0175407B1 (fr)
AT (1) ATE34037T1 (fr)
DE (1) DE3562524D1 (fr)
NL (1) NL8402675A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004205188A (ja) * 2002-11-07 2004-07-22 Tokyo Elex Kk 廃棄物の処理方法及び処理装置
DE10312407A1 (de) * 2003-03-20 2004-10-07 Rolf Tews Verfahren und Vorrichtung zur Beschickung von industriellen Feuerungsanlagen mit Abfallmaterial insbesondere mit Sekundärbrennstoff
JP5227625B2 (ja) * 2008-03-24 2013-07-03 株式会社神鋼環境ソリューション 廃棄物処理システム
CN102192524B (zh) * 2011-03-24 2012-07-18 华新环境工程有限公司 一种水泥窑综合利用垃圾衍生燃料的系统
JP6460799B2 (ja) * 2015-01-07 2019-01-30 株式会社神鋼環境ソリューション 廃棄物供給装置及びその運転方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1422867A (en) * 1922-02-16 1922-07-18 Karycheff Vladimir Apparatus for feeding fuel to furnaces
US2011133A (en) * 1932-06-10 1935-08-13 Yoss Emanuel Pulverized fuel feeder
GB1067191A (en) * 1962-10-17 1967-05-03 Koppers Co Inc Improvements in or relating to injection of particulate material into furnaces
US3387574A (en) * 1966-11-14 1968-06-11 Combustion Eng System for pneumatically transporting high-moisture fuels such as bagasse and bark and an included furnace for drying and burning those fuels in suspension under high turbulence
US4377117A (en) * 1979-12-21 1983-03-22 Kolze Bruce A Particulate waste wood firing system
FR2500122A1 (en) * 1981-02-17 1982-08-20 Heron Pierre Measured solid fuel feed for boiler - has conveyors supplying feed chute to boiler with feed control inlet door

Also Published As

Publication number Publication date
DE3562524D1 (en) 1988-06-09
EP0175407A1 (fr) 1986-03-26
ATE34037T1 (de) 1988-05-15
NL8402675A (nl) 1986-04-01

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