EP0017492A2 - Verfahren und Brenner zum Verbrennen festen Brennstoffs - Google Patents

Verfahren und Brenner zum Verbrennen festen Brennstoffs Download PDF

Info

Publication number
EP0017492A2
EP0017492A2 EP80301080A EP80301080A EP0017492A2 EP 0017492 A2 EP0017492 A2 EP 0017492A2 EP 80301080 A EP80301080 A EP 80301080A EP 80301080 A EP80301080 A EP 80301080A EP 0017492 A2 EP0017492 A2 EP 0017492A2
Authority
EP
European Patent Office
Prior art keywords
burner
fuel
air
solid fuel
compartments
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Withdrawn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
EP80301080A
Other languages
English (en)
French (fr)
Other versions
EP0017492A3 (de
Inventor
Peter Sedge Jones
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.)
JONES ENGINEERING Co Pty Ltd
Original Assignee
JONES ENGINEERING Co Pty Ltd
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 JONES ENGINEERING Co Pty Ltd filed Critical JONES ENGINEERING Co Pty Ltd
Publication of EP0017492A2 publication Critical patent/EP0017492A2/de
Publication of EP0017492A3 publication Critical patent/EP0017492A3/de
Withdrawn legal-status Critical Current

Links

Images

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
    • F23B1/30—Combustion apparatus using only lump fuel characterised by the form of combustion chamber
    • F23B1/32—Combustion apparatus using only lump fuel characterised by the form of combustion chamber rotating

Definitions

  • THIS invention relates to the combustion of solid fuel and is concerned with an efficient method of burning such fuel and a burner for burning such fuel efficiently.
  • the solid fuel may be coal, coke, anthracite, wood, peat, or other solid fuel in lump or similar form.
  • burners At present for burning solid fuel "underfed” burners are used. Such burners have a floor grate through which solid fuel is supplied to a burning zone either by a screw feeder or a chain feeder. This type of burner has a number of defects, for example, the grate tends to burn away in use, combustion is generally poor, and the burner must be cleaned frequently which cleaning involves extremely uncomfortable work. It is also known to burn pulverised solid fuel such as coal powder, in a rotary burner. One problem with such burners is that they involve an exacting technique requiring finely controlled conditions. Also starting up is difficult and requires liquid or gaseous fuel to bring the burner up to the required temperature for igniting the powder and such fluid fuel is also required to maintain combustion.
  • This invention seeks to provide a burner for solid fuel which will be efficient, simple and reliable in construction, and easily controllable with regard to the amount of heat produced. It is also preferred that the burner shall be self-cleaning.
  • a method of burning a solid fuel including the steps of feeding a solid fuel to a cylindrical burner, arranging the burner so that as the burner 4s rotated the fuel moves along the length of the burner,rotating the burner to cause the fuel to form a mass that tumbles over itself, and feeding combustion air to the fuel through the walls of the burner at desired locations at the base of the mass of fuel.
  • the principal axis of the burner is inclined, so that fuel fed into one end of the burner moves along the length of the burner as the burner rotates, and the residue remaining after the fuel has been burnt is automatically discharged from the other end of the burner.
  • the angle of inclination will be very small, and may be between 0,5 and 5 degrees.
  • the quantity of heat generated by the burner can be controlled by varying the volume of fuel fed to the burner, or by varying the rotational speed of the burner, or by varying the volume of combustion air supplied to the burner or by varying the angle of inclination.
  • a burner for solid fuel comprising: a cylindrical outer casing; a cylindrical inner casing forming an annular space with the outer casing; generally longitudinally extending elements arranged in the annular space between the inner and outer casings and dividing the annular space into a plurality of longitudinally extending compartments; a plurality of ports extending through the inner casing at longitudinally and circumferentially spaced positions thereof to connect each compartment with the interior of the burner, each port being inclined with respect to a radius of the cylindrical burner casings and the ports all being inclined in the same sense; means supporting the burner for rotation about an axis; means to rotate the burner in a direction such that the radially innermost end of each port trails the radially outermost end thereof; controllable means for selectively admitting combustion air to each of the compartments at a desired location; and means for feeding solid fuel particles or lumps into the burner, the burner being arranged so that the fuel fed in travels along the length of the burner as the burner is rotated.
  • the principal axis of the burner preferably slopes downwardly from the inlet for solid fuel to the opposite end of the burner, so that as the burner rotates fuel progresses from one end of the burner to the other and clinker or ash is discharged automatically from the lower end of the burner.
  • the degree of slope of the axis of the burner will depend on the type of fuel used, the rotational speed of the burner, the volume of combustion air fed to the burner and so on, but generally the slope will be of the order of 0,5 to 5 degrees,preferably 1 or 2 degrees. In certain cases it may be possible for the burner axis to be horizontal, if the fuel in the burner forms a pile of continuously decreasing height towards the outlet. This could have the same effect as inclining the burner axis.
  • hot air e.g. for drying purposes
  • a heat exchanger can be provided inside or outside the burner, the heat exchanger being an air-to-air type if "clean" hot air is required or an air-to-liquid type if hot liquid is required, e.g. if the burner is used as a boiler.
  • the burner may be supported on an axial shaft or be provided with external riding rings which rotate on rollers.
  • the burner shown in the drawings comprises an outer cylindrical shell 10 and a radially inner cylindrical shell 12 spaced from the outer shell 10 and secured thereto by partition wall members 14 extending longitudinally and parallel to the principal axis of the cylinder.
  • the partition walls 14 divide the annular space between the two shells into a plurality of separate compartments 16.
  • a lining 18 of a suitable refractory material is applied to the inner wall of the inner shell 12.
  • Ports or tuyeres 20 connect each compartment 16 at a number of places along its length to the interior of the burner.
  • each port 20 is inclined with respect to a radius or a normal of the burner and with respect to the direction of rotation R so the innermost end of each port 20 trails behind the radially outer-most end of the port; this is to ensure that during rotation solid fuel lumps or particles in the burner do not move from the interior of the burner to the compartments 16.
  • Each port 20 is formed by casting a suitable metal tube, such as rectangular section tubing, into the refractory lining and connecting the interior of each tube with one of the compartments 16.
  • the outer shell 10 is fitted with riding rings 22 so that the burner can be supported on rollers, not shown. While shown exaggerated in the drawings, the axis of the cylinder slopes at about 1°.
  • Each end of the burner is in sliding, sealed contact with an end plate 24 or 26.
  • the end plate 24 is at the discharge end of the burner and is formed with an opening 25 through which clinker and ash may be discharged.
  • the plate 26 is at the inlet end of the burner and is fitted with a coal feed 28, which may be of any suitable type such as a chain feeder, screw feeder and the like.
  • Air is introduced into the compartmentsl6 from an annular manifold 30.
  • the manifold itself is fed with air from a blower 32.
  • the manifold is divided into two sections 30a and 30b divided by walls 31, one of which includes a butterfly valve 33.
  • the manifold section 30a communicates with compartments 16 feeding ports 20 which open under the burning mass of coal (compare Figures 2 and 3). If the valve 33 is closed, there is no air outlet from the other compartments 16, and flames will therefore be prevented from passing along the other ports 20. Under certain conditions it may however be desirable to pass air through all the ports 20, and the valve 33 can be opened to allow air to bleed from section 30a to section 30b and into the central space of the burner through compartments 16 and ports 20.
  • the burner operates as follows.
  • the burner is started up by feeding a small quantity of the solid fuel to be burnt, through the feed 28.
  • This fuel is ignited using a suitable torch or lance.
  • the fan is switched on.When the fuel is burning sufficiently a motor, not shown, is actuated to cause the burner to rotate.
  • the burning coal forms a mass which tends to move up one side of the inner refractory lining 20 as shown in Figure 2.
  • air for combustion is forced through the compartments 16 and ports 18 to emerge below and pass through the burning mass of fuel.
  • Further fuel is now added to the burner either continuously or intermittently until the mass of burning fuel extends along the entire length of the burner. Naturally, near the inlet the fuel will be largely unburnt, while near the outlet the fuel will have been completely burnt.
  • the rate of burning of the fuel is controlled by selectively controlling the blower 32 to control the volume of air through each of the inlets 30 and by opening or closing the valve 33.
  • the rate of progression of the fuel along the burner is controlled by the slope of the burner and the rotational speed.
  • the volume of heat generated can be controlled by varying the amount of fuel fed to the burner and by varying the volume of combustion air.
  • the burner of the invention will find many applications. Where it is required to produce air for drying, e.g. crops, where a slight amount of ash contamination is acceptable, then air is simply admitted through openings 34 in the plate 26. This air may be forced through the opening 34 or may be drawn through the burner through an outlet 38. If clean air is required, then this is simply achieved by using an air-to-air heat exchanger inside or outside the burner. Where hot liquid is required, e.g. if the burner is used as a boiler or water heater, then an air-to-liquid heat exchanger is used.
  • the burner is exceptionally efficient, because the fuel mass is slowly rolled or turned over while burning in the presence of a localised stream of air. Operation of the burner is continuous, convenient, and automatically self-cleaning. There is efficient heat transfei to any desired medium because there is very little loss of heat through the refractory lining 18. Control of the heat generated and temperature inside the burner is easily accomplished.
  • the burner will burn any size or type of solid fuel or waste material so that it will be highly economical to use and it will be able to use any available fuel in almost any form.
  • the port system may confine the supply of combustion air to the area where due to rotation, the mass of fuel is concentrated.
  • compartments 16 communicate with the combustion zone and are in turn supplied with air from the manifold section 30a.
  • the refractory lining operates under favourable conditions in that no particular region of the lining is continually in contact with the burning fuel.
  • the refractory lining is a poor conductor of heat so that there is minimal heat loss. Also heat passing through the lining warms the incoming combustion air, thus improving combustion efficiency.
  • the burner can be rotated very slowly and so will have a long life in that abrasion of the refractory lining will be minimal. Power consumption for operating the burner is minimal. Wear and maintenance are minimal. Fire bars and chain grates as used conventionally, are eliminated.
  • the unit is simple in principle and operation, easy to understand, and compact in relation to the quantity of heat produced. If a heat exchanger is used then this will be well placed for efficient heat pick-up both from the burning fuel and from the refractory lining.
  • the partition walls need not necessarily be parallel to the longitudinal axis but may be slightly helical.
  • any suitable type of feeder system for the coal may be used, e.g. a feeder belt, a vibratory feeder, a rotary valve, a screw feeder, etc. and such feeders may be independent or rotating with the machine and may be either manually or automatically controlled.
  • the burner may rotate on a central main shaft or stub axles connected to the end plates 24 and 26 instead of the riding rings 22 as shown.
  • a breech or outlet fitting 40 may be provided at the discharge end of the burner.
  • the breech comprises a substantially annular housing which rides on bearings or bearing shoes 42 on the outer casing 10 and has a clinker outlet 44.
  • the use of such a breech may be preferred rather than using a fixed end plate 24 in which event axial expansion and contraction of the burner might cause sealing problems.
  • the use of such a breech when the burner is used for supplying hot air to a drier, assists in connecting the drier and provides a convenient mounting for a feed chute 46 to the drier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
EP80301080A 1979-04-05 1980-04-03 Verfahren und Brenner zum Verbrennen festen Brennstoffs Withdrawn EP0017492A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA791613 1979-04-05
ZA791613 1979-04-05

Publications (2)

Publication Number Publication Date
EP0017492A2 true EP0017492A2 (de) 1980-10-15
EP0017492A3 EP0017492A3 (de) 1980-12-10

Family

ID=25574013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80301080A Withdrawn EP0017492A3 (de) 1979-04-05 1980-04-03 Verfahren und Brenner zum Verbrennen festen Brennstoffs

Country Status (3)

Country Link
EP (1) EP0017492A3 (de)
JP (1) JPS55160205A (de)
AU (1) AU5718580A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983001497A1 (en) * 1981-10-20 1983-04-28 Cremer, Jens Burner head
FR2674002A1 (fr) * 1991-03-13 1992-09-18 Lacroix Jean Antoine Incinerateur rotatif a ringardage et decendrage automatique.

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4644587B2 (ja) * 2005-11-24 2011-03-02 サンポット株式会社 木質燃料燃焼装置
JP2007147104A (ja) * 2005-11-24 2007-06-14 Sunpot Co Ltd 木質燃料燃焼装置
JP5360458B2 (ja) * 2008-02-21 2013-12-04 サンポット株式会社 木質燃料燃焼装置
JP6943489B1 (ja) * 2020-04-23 2021-09-29 有限会社長岡鉄工所 バイオマスバーナー

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444985A (en) * 1944-04-04 1948-07-13 W J Savage Company Inc Fuel burner
US2496156A (en) * 1944-07-27 1950-01-31 Savage W J Co Rotary-type burner for solid fuels
FR1392316A (fr) * 1964-05-05 1965-03-12 Allis Chalmers Mfg Co Procédé et appareil pour l'incinération des ordures ménagères
FR1445141A (fr) * 1965-08-20 1966-07-08 Buckau Wolf Maschf R Tambour rotatif pour l'incinération des déchets industriels
FR1493907A (fr) * 1966-09-14 1967-09-01 Landsverk Ab Four tubulaire tournant pour l'incinération des ordures ou de produits analogues etprocédé de fonctionnement de ce four
US3842762A (en) * 1973-07-13 1974-10-22 Grumman Ecosyst Corp Apparatus for disposing of solid wastes
FR2273236A2 (en) * 1974-05-29 1975-12-26 Heliox Oscillating drum refuse incinerator - has air entry channels behind refractory lining composed of concrete blocks
FR2332330A1 (fr) * 1975-11-21 1977-06-17 British Steel Corp Procede et appareil pour la fabrication de fer ou d'acier
FR2339135A1 (fr) * 1976-01-21 1977-08-19 Lillers Ste Ind Perfectionnements a un four rotatif pour incineration de dechets

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444985A (en) * 1944-04-04 1948-07-13 W J Savage Company Inc Fuel burner
US2496156A (en) * 1944-07-27 1950-01-31 Savage W J Co Rotary-type burner for solid fuels
FR1392316A (fr) * 1964-05-05 1965-03-12 Allis Chalmers Mfg Co Procédé et appareil pour l'incinération des ordures ménagères
FR1445141A (fr) * 1965-08-20 1966-07-08 Buckau Wolf Maschf R Tambour rotatif pour l'incinération des déchets industriels
FR1493907A (fr) * 1966-09-14 1967-09-01 Landsverk Ab Four tubulaire tournant pour l'incinération des ordures ou de produits analogues etprocédé de fonctionnement de ce four
US3842762A (en) * 1973-07-13 1974-10-22 Grumman Ecosyst Corp Apparatus for disposing of solid wastes
FR2273236A2 (en) * 1974-05-29 1975-12-26 Heliox Oscillating drum refuse incinerator - has air entry channels behind refractory lining composed of concrete blocks
FR2332330A1 (fr) * 1975-11-21 1977-06-17 British Steel Corp Procede et appareil pour la fabrication de fer ou d'acier
FR2339135A1 (fr) * 1976-01-21 1977-08-19 Lillers Ste Ind Perfectionnements a un four rotatif pour incineration de dechets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983001497A1 (en) * 1981-10-20 1983-04-28 Cremer, Jens Burner head
FR2674002A1 (fr) * 1991-03-13 1992-09-18 Lacroix Jean Antoine Incinerateur rotatif a ringardage et decendrage automatique.

Also Published As

Publication number Publication date
JPS55160205A (en) 1980-12-13
EP0017492A3 (de) 1980-12-10
AU5718580A (en) 1980-10-09

Similar Documents

Publication Publication Date Title
US4009667A (en) Incinerator for combustible refuse
US4066024A (en) Rotating fluidized bed combustor
CA1254796A (en) Pre-furnace heating equipment for the combustion of combustible material having a high ash content
EP0035908B1 (de) Heizgerät zum Verbrennen fester Brennstoffe, vorzugsweise zur Deckung des Wärmebedarfs von Wohnungen
US4859177A (en) Apparatus for incinerating combustible material
RU2451239C2 (ru) Автоматизированный угольный котел
EP0017492A2 (de) Verfahren und Brenner zum Verbrennen festen Brennstoffs
US2702013A (en) Burner for incinerating cotton gin waste
JPH08508818A (ja) スラスト式焙焼システム上での固体燃焼法
WO2016014004A1 (en) A continuous granular fuel burner
US4724778A (en) Air control for combustor
US3218995A (en) Sludge drying and incineration apparatus for industrial waste-water treatment
US836145A (en) Fuel-burner.
US4699070A (en) Secondary grate for rotary combustor
EP1515925A2 (de) Verfahren zur herstellung eines leichtzuschlages sowie drehrohrofen zur herstellung desselben
US4735156A (en) Rotary combustor for burning municipal solid waste
EP0248808B1 (de) Brenner speziell für biomasse
CN110397930B (zh) 一种带有搅翻杆的可旋转式内胆的双层炉体焚烧装置
US3323474A (en) Rotary furnace for incinerating house refuse, industrial refuse, and other waste materials
JPH0547928Y2 (de)
JPS61149780A (ja) 回転焼成炉
US820783A (en) Grate and fuel feeder.
US1977620A (en) Stoker
US3889610A (en) Compact rotary-housing incinerator and steam generator
CN110397931B (zh) 一种内胆可旋转的双层炉体焚烧装置

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

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19811119

RIN1 Information on inventor provided before grant (corrected)

Inventor name: JONES, PETER SEDGE