WO1987005281A1 - Procede et appareil pour amener un ecoulement regulier d'un produit particulaire - Google Patents

Procede et appareil pour amener un ecoulement regulier d'un produit particulaire Download PDF

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Publication number
WO1987005281A1
WO1987005281A1 PCT/SE1987/000103 SE8700103W WO8705281A1 WO 1987005281 A1 WO1987005281 A1 WO 1987005281A1 SE 8700103 W SE8700103 W SE 8700103W WO 8705281 A1 WO8705281 A1 WO 8705281A1
Authority
WO
WIPO (PCT)
Prior art keywords
packing
storage container
chamber
packing chamber
roll
Prior art date
Application number
PCT/SE1987/000103
Other languages
English (en)
Inventor
Jan-A^oke NILSSON
Bengt Hansson
Original Assignee
Rippelton N.V.
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 Rippelton N.V. filed Critical Rippelton N.V.
Publication of WO1987005281A1 publication Critical patent/WO1987005281A1/fr

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/02—Devices for feeding articles or materials to conveyors
    • B65G47/16—Devices for feeding articles or materials to conveyors for feeding materials in bulk
    • B65G47/18—Arrangements or applications of hoppers or chutes
    • B65G47/19—Arrangements or applications of hoppers or chutes having means for controlling material flow, e.g. to prevent overloading
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus

Definitions

  • the present invention relates to a method and an apparatus for a dosage of a regular but variable flow of a particu- late material to a recipient. More specifically, the in ⁇ vention relates to a method and an apparatus, in which the material from a storage container is fed to a packing chamber, in which the material is packed to a certain pac ⁇ king degree and consequently to a certain volumetric weight, which is related to the material of interest, after which the material is discharged with a certain regular volumet- ric amount per unit of time.
  • the present invention has been developed in order to handle biological fuels, the volumetric weights of which may vary to a high degree de ⁇ pending to the packing degree, primarily chopped straw and other fragmentized straw products, but it is advanta- geous to use it also for other solid fuels, e.g. fragmen ⁇ tized paper, as well as for other particulate materials than solid fuels, e.g. for dosage of cattle-food materials to a pelletizer device.
  • the dosage can as a principle be either volumetric or gravimetric. Gravimetric dosage normally means a continuous weighing, if the dosage is to take place continuously, which requires a quite ex ⁇ pensive apparatus. Volumetric dosage in return requires, that the volumetric weight of the material is known. In the art there is no technical and economically acceptable solution to the problem of a volumetric dosage of particu- late material in the form av chopped straw and similar comp ⁇ ressible materials.
  • the object of the present invention is to suggest a method and an apparatus for a volumetric dosage of a regular but variable flow of a particulate material, which may be highly compressible, e.g. chopped straw, fragmentized paper and the like.
  • the material is packed by means of at least one rotary packing roll, which is disposed between the storage container and the packing chamber, which packing roll constitutes the bottom of the storage container, and at the same time it conveys the mate ⁇ rial from the storage container to the packing chamber as well as gives the material in the packing chamber a certain volumetric weight, which is related to the material of in ⁇ terest.
  • the material can be discharged by means of a dosage roll, which during every turn picks up a certain volume of the material from the packing chamber and delivers this amount of material to a duct outside the pac ⁇ king chamber. From there the material is pneumatically con ⁇ veyed via said duct to a recipient, which can be a burner, in case the particulate material is a solid fuel.
  • the packing roll or packing rolls which are disposed between the storage container and the pac ⁇ king chamber, are provided partly with means designed to re- turn the excess material to the storage container, so that the volume of the material in the packing chamber all the time is kept constant, and partly with means designed to exert a pressure against this constant volume of particu ⁇ late material, so that also the packing degree in this vo ⁇ lume is kept constant.
  • these elements i.e. the return feeders and the "packers" are integrated in one and the same packing roll and suitably two such pac ⁇ king rolls are disposed in parallell with each other bet ⁇ ween the storage container and the packing chamber.
  • the storage container is disposed above the pac- king chamber, so that the material in the storage contai ⁇ ner is fed downwards towards the packing rolls by its own weight and so that the material in the packing cham ⁇ ber is fed downwards against the dosage roll by means of a combined action of the packing rolls and the weight of the material.
  • the main components of the apparatus are made up of a sto ⁇ rage container 1, below it a packing chamber 2, between storage container 1 and packing chamber 2 two packing rolls 3, a dosage roll 4 in the bottom of packing chamber 2, a pneumatic conveyor duct 5 and a separator 6.
  • a fan in the conveyor duct has reference numeral 18.
  • storage container 1 there is a supply of the used so ⁇ lid fuel 7, e.g. chopped straw.
  • Storage container 1 is gradually filled with new fuel 7, when the fuel is dis ⁇ charged from the lowermost portion.
  • the storage container can e.g. be equipped with level guards, which inform of when the container is to be filled (20) and when it is filled (21) .
  • the bottom of storage container 1 is made up of packing rolls 3, which are provided with two types of pins, namely resilient helical pins 8 and rigid radial pins.
  • the number of packing rolls is two in this embodi ⁇ ment.
  • Each packing roll 3 is provided with four resilient and four rigid pins 8 and 9 respectively.
  • Packing rolls 3 are disposed in a space 10 called a middle section. Sides 11 of the middle section have a cylindrical shape.
  • Packing rolls 3 which rotate with opposite directions, have three functions. Firstly, they constitute the bottom of storage container 1. Secondly, they convey fuel 7 down ⁇ wards to packing chamber 2 through middle section 10. Thirdly, they give the fuel in packing chamber 2'a cons ⁇ tant volumetric weight. The resilient, helically bent pins 8 are then used to compress fuel 7 1 in packing chamber 2 above dosage roll 4 to a certain volumetric weight. Rigid pins 9 are primarily used to feed fuel 7 downwards from storage container 1 to packing chamber 2 but also to re ⁇ turn the excess material upwards to storage container 1 through middle section 10, so that all the time a constant volume of fuel 7' in packing chamber 2 is maintained. Thus, when level 12 in packing chamber 2 rises, so that it is reached by rigid pins 9, the latter will convey the ex ⁇ cess back to storage container 1.
  • Dosage roll 4 is disposed in the lower, trough-shaped pro ⁇ jection 13 below packing chamber 2. In this trough-shaped projection, which is provided with a cylindrical bottom portion 14, dosage roll 4 rotates. Its speed provides the desired fuel flow and is controlled by the heat require ⁇ ment of the succeeding boiler. Dosage roll 4 and packing rolls 3 rotate by means of not shown driving means. Dosage roll 4 comprises a perforated tube 15, which is provided with radially, possibly somewhat forwardly bent, outwardly directed barbs 16. Inside tube 15 a nozzle 17 is disposed having a narrow gap arranged in the longitudinal direction of the roll. Return air 19 flows through this gap, is then fed through the perforations of the dosage roll, hits the conveyed fuel, which is in this way removed from the barbs, and is then discharged through duct 5.
  • -Dosage roll 4 has also three functions. It is designed to pick up fuel 7 1 having a certain volume weight from packing chamber 2. It is also designed to convey this fuel to the nozzle area and to deliver this amount of fuel to the air stream in pneumatic conveyor-duct 5. In order to give the boiler, to which the dosage device is connected, a large range of control, the fuel conveyor air flow must be as small as possible. At the same time a certain air flow is required in order to loosen the fuel from dosage roll 4. In order to meet these two requirements a cyclone separa ⁇ tor 6 is disposed in front of the burner chamber. The re ⁇ turn air from the cyclone separator is used to loosen the fuel from dosage roll 4 and blow it into conveyor duct 5.
  • the amount of air, which flows to the boiler, is fed into the dosage device from the ambient air. Consequently, the dosage device works free from dust, which is very impor- tant in order to prevent dust explosions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Packages (AREA)

Abstract

Un appareil, servant lors du dosage d'un écoulement variable mais régulier d'un produit particulaire, comprend un conteneur de stockage (1) pour le produit (7), une chambre de tassement (2) pour le produit (7'), des organes (3, 9) servant à transporter le matériau (7) depuis le conteneur de stockage jusqu'à la chambre de tassement, ainsi que des organes (3, 8) servant à tasser le matériau (7') dans la chambre de tassement jusqu'à un certain degré de tassement lui permettant d'atteindre un certain poids volumétrique constant.
PCT/SE1987/000103 1986-03-10 1987-03-04 Procede et appareil pour amener un ecoulement regulier d'un produit particulaire WO1987005281A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8601091A SE8601091L (sv) 1986-03-10 1986-03-10 Sett och anordning for att dosera ett jemnt flode av fastbrensle
SE8601091-5 1986-03-10

Publications (1)

Publication Number Publication Date
WO1987005281A1 true WO1987005281A1 (fr) 1987-09-11

Family

ID=20363758

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1987/000103 WO1987005281A1 (fr) 1986-03-10 1987-03-04 Procede et appareil pour amener un ecoulement regulier d'un produit particulaire

Country Status (3)

Country Link
AU (1) AU7128087A (fr)
SE (1) SE8601091L (fr)
WO (1) WO1987005281A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1052456A1 (fr) * 1999-05-12 2000-11-15 Windhager Zentralheizung Ag Système d'alimenttion pneumatique pour installation de chauffage
WO2004083723A1 (fr) * 2003-03-20 2004-09-30 Rolf Tews Procede et dispositif pour alimenter des installations de combustion industrielles en dechets, en particulier en combustibles secondaires
EP2053310A1 (fr) * 2007-10-25 2009-04-29 Jolly-Mec Caminetti S.p.a. Système d'alimentation de granulés vers un dispositif de combustion
EP2592026A1 (fr) * 2011-11-08 2013-05-15 KWB - Kraft und Wärme aus Biomasse Gesellschaft m.b.H. Installation d'acheminement par aspiration

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1095533B (de) * 1958-02-14 1960-12-22 Vyzk Ustav Strojuu Chladicich Dosierungsvorrichtung fuer schuettige und breiige Massen
CH491589A (de) * 1968-09-18 1970-06-15 Engelbrecht & Lemmerbrock Vorrichtung zum Aufnehmen und Weitergeben von Blatt- oder Halmgut an ein Fördergebläse
DE2256929A1 (de) * 1971-12-21 1973-06-28 Sig Schweiz Industrieges Dosiervorrichtung mit zellenrad
CH569927A5 (en) * 1973-08-24 1975-11-28 Rueegsegger Walter Waste wood fixed furnace auger feeder - variable density of chips is compensated by slider mechanism
DE2732199A1 (de) * 1977-07-16 1979-01-25 Andreas Jaudt Zellenradschleuse mit ausblasbaren radtaschen
DE3005241A1 (de) * 1979-05-10 1981-08-20 Hazemag Dr. E. Andreas GmbH & Co, 4400 Münster Zellendradschleuse
DE3005039A1 (de) * 1980-02-11 1981-08-20 Siegfried 2301 Osdorf Bieder Verfahren und vorrichtung zur verbrennung von locker gelagerten feststoffen
DE3016322A1 (de) * 1980-04-28 1981-11-05 Günther 5628 Heiligenhaus Unger Beschickungsverfahren fuer einen feststoffbrenner und vorrichtung zur durchfuehrung des verfahrens
EP0056425A1 (fr) * 1981-01-21 1982-07-28 Siegfried Bieder Dispositif de combustion, notamment pour paille comprimée
DE3316176A1 (de) * 1983-05-04 1984-11-08 Focke & Co, 27283 Verden Vorrichtung zur bildung und zum abtransport von tabakportionen

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1095533B (de) * 1958-02-14 1960-12-22 Vyzk Ustav Strojuu Chladicich Dosierungsvorrichtung fuer schuettige und breiige Massen
CH491589A (de) * 1968-09-18 1970-06-15 Engelbrecht & Lemmerbrock Vorrichtung zum Aufnehmen und Weitergeben von Blatt- oder Halmgut an ein Fördergebläse
DE2256929A1 (de) * 1971-12-21 1973-06-28 Sig Schweiz Industrieges Dosiervorrichtung mit zellenrad
CH569927A5 (en) * 1973-08-24 1975-11-28 Rueegsegger Walter Waste wood fixed furnace auger feeder - variable density of chips is compensated by slider mechanism
DE2732199A1 (de) * 1977-07-16 1979-01-25 Andreas Jaudt Zellenradschleuse mit ausblasbaren radtaschen
DE3005241A1 (de) * 1979-05-10 1981-08-20 Hazemag Dr. E. Andreas GmbH & Co, 4400 Münster Zellendradschleuse
DE3005039A1 (de) * 1980-02-11 1981-08-20 Siegfried 2301 Osdorf Bieder Verfahren und vorrichtung zur verbrennung von locker gelagerten feststoffen
DE3016322A1 (de) * 1980-04-28 1981-11-05 Günther 5628 Heiligenhaus Unger Beschickungsverfahren fuer einen feststoffbrenner und vorrichtung zur durchfuehrung des verfahrens
EP0056425A1 (fr) * 1981-01-21 1982-07-28 Siegfried Bieder Dispositif de combustion, notamment pour paille comprimée
DE3316176A1 (de) * 1983-05-04 1984-11-08 Focke & Co, 27283 Verden Vorrichtung zur bildung und zum abtransport von tabakportionen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 7, No. 25; & JP,A,57 180 531, published 6 November 1982. *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1052456A1 (fr) * 1999-05-12 2000-11-15 Windhager Zentralheizung Ag Système d'alimenttion pneumatique pour installation de chauffage
WO2004083723A1 (fr) * 2003-03-20 2004-09-30 Rolf Tews Procede et dispositif pour alimenter des installations de combustion industrielles en dechets, en particulier en combustibles secondaires
EP2053310A1 (fr) * 2007-10-25 2009-04-29 Jolly-Mec Caminetti S.p.a. Système d'alimentation de granulés vers un dispositif de combustion
EP2592026A1 (fr) * 2011-11-08 2013-05-15 KWB - Kraft und Wärme aus Biomasse Gesellschaft m.b.H. Installation d'acheminement par aspiration

Also Published As

Publication number Publication date
SE8601091D0 (sv) 1986-03-10
SE8601091L (sv) 1987-09-11
AU7128087A (en) 1987-09-28

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