EP0086819A1 - Procede et appareil de deplacement d'un combustible dans un four - Google Patents

Procede et appareil de deplacement d'un combustible dans un four

Info

Publication number
EP0086819A1
EP0086819A1 EP82902730A EP82902730A EP0086819A1 EP 0086819 A1 EP0086819 A1 EP 0086819A1 EP 82902730 A EP82902730 A EP 82902730A EP 82902730 A EP82902730 A EP 82902730A EP 0086819 A1 EP0086819 A1 EP 0086819A1
Authority
EP
European Patent Office
Prior art keywords
fuel
trough
furnace
spiral
burning
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Withdrawn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
EP82902730A
Other languages
German (de)
English (en)
Inventor
Topi PÄMPPI
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
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0086819A1 publication Critical patent/EP0086819A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/16—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support
    • 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

Definitions

  • the present invention relates to a mode for, in a furnace, carrying forward and moving fuel made of combustible materials by cutting, crushing, compressing or by a similar method, such as wood, peat, straw, etc., e.g., in the form of chips, briquettes or pellets, the said fuel being fed from the fuel container into the furnace through an opening in the furnace wall by means of a tube placed outside the furnace, connected to the opening, and by means of a spiral that is rotated in the said tube, whereat the fuel ends up on a trough open at the top and placed in the furnace and air is blown through holes provided in the walls of the trough into t the fuel.
  • a similar method such as wood, peat, straw, etc.
  • the invention is in particular characterized in that the burning fuel is shifted forwards in the trough initially preferably as pushed by the new fuel entering into the furnace from outside, without any agitating means being provided among the fuel at this part of the trough, and at least towards the end of the trough, among the partly burnt and still burning fuel with a higher content of ashes, e.g., a rod-shaped agitator twisted to a spiral shape and attached to the shaft at relatively few points is rotated so as to stir the fuel and the ashes and to shift them orwards as well as in order to reduce the drawbacks resulting from caking of the ashes.
  • a rod-shaped agitator twisted to a spiral shape and attached to the shaft at relatively few points is rotated so as to stir the fuel and the ashes and to shift them orwards as well as in order to reduce the drawbacks resulting from caking of the ashes.
  • Figure.1 shows the equipment as a side view, as a vertical section
  • Figure 2 shows a section of the above along line A-A
  • Figure 3 likewise shows a section,along
  • Figure 4 likewise shows a section, along line C-C .
  • Figure 5 likewise shows a section, along line D-D.
  • sectional views in order to make them clearer, some components located behind the section plane have not been drawn.
  • the furnace proper is outlined only partly by means of a broken line 1. Its lef vertical wall is provided with an opening large enough so that the tube 2 just fits into it and fills it. Inside the tube 2, there is another, concentric tube 3. To a shaft 4 placed inside the said tube, a screw-shaped spiral sheet 5 is connected, which is drawn only schematically. The spiral ends outside the furnace at 6. When the shaft is rotated, the spiral shifts fuel out of the fuel container (not shown in the drawing) through the tube 3 into the -furnace. The shaft may be rotated by jerks, at appropriate time intervals.
  • the times and speeds of rotation of the shaft are regulated by means of a thermostat (not shown in the drawing) , which from time to time starts the motor rotating the shaft 4 so that an appropriate quantity of fuel per unit of time burns and maintains the desired temperature in the furnace and, e.g. , in the water heated by the furnace, whereat the thermostat may be located in the said water.
  • a thermostat not shown in the drawing
  • Air is blown into the space between the tubes 2 and 3 from an appropriate point (not shown in the figure) .
  • the tubes 2 and 3 as tubes proper, end _ approximately at the wall of the furnace.
  • the bottom portions of the tubes continue in the way shown in Figures 3 to 5 inside the furnace as a trough 8 open at the top.
  • the air blown between the tubes 2 and 3 into this hollow trough flows out through the holes 7 into the fuel placed in the trough 8, thus maintaining the burning.
  • the new fuel pushes the already burning fuel ahead of it in the trough further.
  • the trough is provided with slots 13, shown in Fig. 4, through which the ashes can fall down off the trough onto the furnace bottom and into the spaces for the ashes.
  • the shaft is also joined by a spiral-shaped rod 9 by means of radial arms 10.
  • the slots 13 extend in the longitudinal direction of the trough at the end portion of the trough approximately equally far as the spiral 9 extends over the trough.
  • the shaft 4 incorporates no member shifting the fuel.
  • the fuel In this part of the trough, viz., initially the dry-distillation of the new fuel takes place, then its ignition.
  • the fuel In order that the fuel should catch fire readily and start burning all right, it is important that the relative positions of the fuel particles in relation to each other are not shifted extensively, in order that the initially tiny flames were able to grow in the passages between the fuel particles in which they started.
  • An excessive stirring of the firewood e.g., in an ordinary domestic fireplace immediately after kindling will extinguish the fire.
  • the new fuel is then pushed onto this slag layer, where it does not obtain a sufficient ⁇ quantity of air, and the burning there is disturbed or totally prevented.
  • This is quite a detrimental drawback, which is experienced especially when certain species of peat and plants are burnt.
  • the ashes of plants mainly consist of silicates, phosphates, sulphates and carbonates of potassium, sodium, calcium, magnesium and iron. The relative proportions of these substances, however, vary to a great extent depending on the species of plant, and so do the ash contents as well as the melting points and the caking tendencies.
  • the apparatus in accordance with the invention it is, however, readily possible to burn any of the above- fuel sorts.
  • the apparatus is also suitable for use in various existing furnaces. For example, out of an oil-burning furnace, the oil burner proper may. be removed and replaced by an apparatus in accordance with the present invention, burning solid fuel particles in the way described above, together with the necessary accessories.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Solid-Fuel Combustion (AREA)

Abstract

Procédé permettant, dans un four, de faire avancer et de déplacer un combustible composé de matériaux combustibles en découpant, broyant, comprimant ou en traitant par tout autre procédé semblable, du bois, de la tourbe, de la paille, etc., p.ex. sous la forme de copeaux, briquettes ou boulettes. Le combustible est alimenté depuis le conteneur à combustible dans le four au travers d'une ouverture aménagée dans la paroi du four à l'aide d'un tube (2, 3) placé à l'extérieur du four, relié à l'ouverture, et à l'aide d'une spirale (5) qui tourne dans ce tube. Le combustible termine sa course sur une auge (8) ouverte sur sa partie supérieure et placée dans le four, et de l'air est insufflé au travers d'orifices (7) aménagés dans les parois de l'auge, dans le combustible. Le combustible allumé est déplacé vers l'avant dans l'auge (8), de préférence poussé par le nouveau combustible qui entre dans le four depuis l'extérieur, sans avoir recours à des moyens agitateurs du combustible dans cette partie de l'auge. Au moins vers l'extrémité de l'auge, parmi le combustible partiellement brûlé et qui brûle encore et ayant une teneur élevée de cendre, un agitateur en forme de tige (9) torsadé en spirale et fixé à l'axe en quelques points tourne de manière à remuer le combustible et les cendres et réduire les inconvénients que présente la formation d'un gâteau de cendres, et faire avancer le combustible.
EP82902730A 1981-09-03 1982-08-30 Procede et appareil de deplacement d'un combustible dans un four Withdrawn EP0086819A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI812730 1981-09-03
FI812730A FI812730A7 (fi) 1981-09-03 1981-09-03 Tapa kuljettaa eteenpäin ja liikutella polttoainetta uunissa siten, että se edistää palamista ja vähentää tuhtuhkan sintraamisesta johtuvia haittoja sekä laite tämän tavan toteutttoteuttamiseksi.

Publications (1)

Publication Number Publication Date
EP0086819A1 true EP0086819A1 (fr) 1983-08-31

Family

ID=8514675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82902730A Withdrawn EP0086819A1 (fr) 1981-09-03 1982-08-30 Procede et appareil de deplacement d'un combustible dans un four

Country Status (3)

Country Link
EP (1) EP0086819A1 (fr)
FI (1) FI812730A7 (fr)
WO (1) WO1983000911A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2181971C (fr) * 1996-07-24 2002-12-17 Clarence Waldner Transport de materiau particulaire vers un orifice de distribution
FI114411B (fi) * 2002-09-04 2004-10-15 Laempoe Linna Oy Palavan materiaalin polttojalusta

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1233821A (en) * 1913-11-28 1917-07-17 Stevens Mfg Ass Underfeed stoker for boilers.
US1340274A (en) * 1919-05-29 1920-05-18 Kelly Orin Automatic firing device
US2121229A (en) * 1935-04-05 1938-06-21 George N Halter Mechanical furnace
US2142701A (en) * 1935-12-07 1939-01-03 John S Skelly Underfeed stoker
FR1481799A (fr) * 1966-06-02 1967-05-19 Poêle domestique pour brûler du charbon avec chargement mécanique
DE2204308C3 (de) * 1972-01-31 1975-10-16 Agrimonti, Claude Drehrohrofen zur Abfallverbrennung
SE418643B (sv) * 1979-12-18 1981-06-15 Robert C Tyer Avfallsforbrenningsugn med skruvtransportor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8300911A1 *

Also Published As

Publication number Publication date
FI812730L (fi) 1983-03-04
FI812730A7 (fi) 1983-03-04
WO1983000911A1 (fr) 1983-03-17

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT DE FR GB SE

17P Request for examination filed

Effective date: 19830906

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19840917