EP0399898B1 - Rouleau de grille de foyer, notamment pour incinération de déchets, avec un garnissage tubulaire formé d'anneaux de barreaux séparés par des intervalles de soufflage de largeur maintenue - Google Patents

Rouleau de grille de foyer, notamment pour incinération de déchets, avec un garnissage tubulaire formé d'anneaux de barreaux séparés par des intervalles de soufflage de largeur maintenue Download PDF

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Publication number
EP0399898B1
EP0399898B1 EP19900401364 EP90401364A EP0399898B1 EP 0399898 B1 EP0399898 B1 EP 0399898B1 EP 19900401364 EP19900401364 EP 19900401364 EP 90401364 A EP90401364 A EP 90401364A EP 0399898 B1 EP0399898 B1 EP 0399898B1
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EP
European Patent Office
Prior art keywords
bars
rings
bosses
roller
bar
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 - Lifetime
Application number
EP19900401364
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0399898A1 (fr
Inventor
André Le Lan
José De Freitas
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.)
Tunzini Picard Thermique Environnement Te Rueil-Ma
Original Assignee
TUNZINI PICARD THERMIQUE ENVIRONNEMENT
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Publication date
Application filed by TUNZINI PICARD THERMIQUE ENVIRONNEMENT filed Critical TUNZINI PICARD THERMIQUE ENVIRONNEMENT
Publication of EP0399898A1 publication Critical patent/EP0399898A1/fr
Application granted granted Critical
Publication of EP0399898B1 publication Critical patent/EP0399898B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H17/00—Details of grates
    • F23H17/12—Fire-bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H17/00—Details of grates
    • F23H17/08—Bearers; Frames; Spacers; Supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H9/00—Revolving-grates; Rocking or shaking grates
    • F23H9/02—Revolving cylindrical grates

Definitions

  • the invention relates to a roll of hearth grate intended in particular for the incineration of waste and comprising a cascade of rollers driven in rotation about parallel horizontal axes, this roll comprising a framework in a cylindrical cage with, between two flanges, longitudinal members arranged along generators regularly distributed over the periphery, and a tubular lining formed of a plurality of groups of circular rings generally in planes perpendicular to the axis, in axial succession from one flange to the other, intervals being provided between the rings for supplying combustion air, while the rings are segmented into arcuate bars which hang, with play, between two neighboring side members, and intermediate pieces associated respectively with the groups of rings and fixed to the stringers so as to limit the axial travel of the bars in the groups.
  • the hearth grates formed of a cascade of rollers are suitable for the incineration of solid waste, household waste or industrial residues which have an erratic texture, a high moisture content and a relatively low calorific value, because they cause displacement, backfilling and reversing of the combustible layers which descend the cascade, and lend themselves to a distributed blowing of oxidizing air at high flow rate, conducive to the drying of the waste at the entry into the furnace and to the acceleration of combustion.
  • the elements on which the combustible materials rest are subjected to very severe thermal stresses, between overheating due to radiation and contact with materials in combustion, and cooling from the supply of combustion air.
  • the rollers therefore have a lining of refractory castings, mounted with clearance on a load-bearing framework.
  • the design of the lining of rotary grate rollers poses particular problems, the lining being subjected to thermal cycles with heating in the hearth, for almost half a turn, and cooling below the hearth for the rest of the turn.
  • the packing elements at the same time as they are rotated by the roller, perform a rotation on themselves relative to the vertical direction of gravity. Their attachment to the framework must hold them in the three directions perpendicular, radial peripheral or tangential, and axial.
  • the framework very generally has a cylindrical cage structure (DE-C-1 164 014; DE-C-3 341 835; EP-A-0 124 826) with, between two end flanges, iron longitudinal members T arranged along generatrices of the cage with regular angular spacing, the core of the side members being oriented in a plane passing through the axis of the roller, and directed towards this axis.
  • a cylindrical cage structure DE-C-1 164 014; DE-C-3 341 835; EP-A-0 124 826
  • iron longitudinal members T arranged along generatrices of the cage with regular angular spacing, the core of the side members being oriented in a plane passing through the axis of the roller, and directed towards this axis.
  • the packing elements are commonly bars in the form of ring segments, which each extend between two neighboring side members, and follow one another along the periphery of the roller to form a ring in a plane perpendicular to the axis of the roller.
  • the rings follow one another from one flange to the other and an interval for the supply of combustion air is provided between two successive rings, generally thanks to the presence of projecting keys on the lateral flanks of the bars. In contact, the keys of two axially contiguous bars therefore determine the minimum width of the interval.
  • the bars have a section, perpendicular to the periphery of the ring, T-shaped with a web forming a rib directed towards the axis, in a plane perpendicular to this axis, while the wings form the support surface for the combustible mass.
  • the attachment of the bars is obtained by providing notches at the two ends of the core which engage around the wings of the side members. To put the bars in place, at least one flange is released and the bars are threaded parallel to the axis.
  • the first bars can be presented at an angle with a plane perpendicular to the axis between the side members, so that the core of the bar, below the notches, passes between the wings of the side members. Then we return the bar to its normal orientation.
  • this drawback is attenuated, while disassembly of the roller is facilitated, by dividing the rings into a plurality of groups, and by placing intermediate rings between the groups.
  • These intermediate rings are formed of parts in a ring segment, with a first end bolted to a spar, while the second end rests on the spar immediately behind. This second end is extended by a tenon, which a mortise made in the first end of the contiguous intermediate piece behind traps.
  • the spacers have at least one row of blow holes.
  • the invention provides a roll of hearth grate intended in particular for the incineration of waste and comprising a cascade of rollers driven in rotation about parallel horizontal axes, this roll comprising a framework in a cylindrical cage with, between two flanges, longitudinal members arranged according to generators regularly distributed over the periphery, and a tubular lining formed by a plurality of groups of circular rings generally in planes perpendicular to the axis, in axial succession of a flange at the other, intervals are provided between the rings for blowing combustion air, while the rings are segmented into arcuate bars which hang, with play, between two neighboring side members, and intermediate parts, associated respectively with groups of rings, and fixed to the side members so as to limit the axial travel of the bars in the groups, charac terized in that each intermediate piece is fixed longitudinally on a spar over the axial extent of a group of rings, between contiguous ends of bars, this intermediate piece and the contiguous ends of bars
  • the spacers are mounted longitudinally without overhang on the side rails, and are thus protected against thermal stresses or mechanical shocks.
  • the interlocking conformations ensure that each end of the bar contiguous to the intermediate piece is maintained in an average position relative to the framework, so that the variations in width of intervals between rings are not cumulative, and that the distribution of combustion air remains suitable.
  • the side members are even in number with a current T profile.
  • the bars then have the respective nesting conformation at a first end, and at the second end a notch in a core, which engages on a spar wing; for each group of rings, there is one insert per pair of side members.
  • the intermediate pieces associated with the successive groups are alternately mounted on one and the other side members of a pair.
  • the intermediate pieces are preferably of generally parallelepipedal shape with two lateral faces substantially parallel to the core of the spar, and external and internal faces parallel to the wings, the interlocking configuration being, for the intermediate piece, constituted by bosses protruding from the side faces and narrowing from the outside face until it merges into the side walls, these bosses repeating in direction parallel to the axis with a pitch corresponding to the width of a ring increased by that of a blowing interval.
  • bosses preferably marry portions of spheres.
  • the first ends of the bars have complementary recesses located at the angles of the wings of the T-section bar with the first end.
  • the intermediate bosses of the intermediate piece each occupy the contiguous recesses of two bars. At the corners of the insert, the bosses are half of the intermediate bosses.
  • the intermediate piece is in two radially superimposable parts; a parallelepiped base is fixed directly on the beam and facilitates, during assembly, the positioning of the bars; then a crown is reported which carries the interlocking bosses.
  • a roller hearth grid consists of a plurality of rollers 1, 2, 3, 4 which follow one another on a downward slope, with their axes 1b , 2b ; 3 b , 4 b parallel and generally equidistant, and which rotate around their axes in a direction (here clockwise) such that the part of their periphery 1 a , 2 a , 3 a , 4 a which is on the top goes in the direction of the downward slope.
  • the waterfall has been represented here with four rollers, so as not to overload the figure. In practice, waterfalls frequently have five or six rollers.
  • the grid thus forms a cascade, the solid fuel, such as urban waste, being discharged on top of the roll 1, while the ashes and bottom ash will be discharged by the lower roller 4 towards an ashtray.
  • combustion air is blown either laterally or from below to be injected into the combustible mass through interstices in the periphery 1 a , 2 a , 3 a , 4 a rollers.
  • the periphery of the rollers As shown diagrammatically on the roll 1 of FIG. 1, is coated with a refractory metal lining, consisting of a succession of rings separated by intervals i (see figure 3), from one flange 1 c , 2 c , 3 c , 4 c from the roller to the other (not visible and not referenced).
  • the structure and shape of the flanges are conventional, and are not specified here.
  • the rings are attached, with clearance, to the roller support structure. This play exists in three dimensions, axial, radial and peripheral of the roller.
  • these rings are divided into groups G1, G2, G3, associated intermediate pieces limiting the axial sliding of the group of rings.
  • the groups of rings have been represented three in number, so that the figure is sufficiently detailed without being overloaded; of course this number of three is not imperative.
  • the rings are themselves divided, along the periphery, into arcuate bars which are hooked by their ends, to structural beams, which form a cylindrical cage extending from a flange 1 c , 2 c , 3 c , 4 tsp roll to another.
  • these longitudinal members are T-sections, with a core in a plane passing through the axis of the roller and directed towards this axis, and wings aligned in a plane tangent to the periphery of the cage.
  • FIG. 2 which takes up the widespread state of the art on this point, these longitudinal members, seen in section, are designated by the references 10, 10 ′, 10 ′′, 10 ′′′.
  • the bars have a T-section, with wings defining the external surface of the lining, and a core directed towards the axis of the roller and disposed in a plane perpendicular to this axis. Notches in the core at the two ends of the bar are engaged around the wings of two neighboring side members.
  • the spacers, which maintain the independence of the groups of bars, are ring arcs which are bolted at one end to the wing of a spar, and rest on the neighboring spar by their other end.
  • the mounting of the bars is carried out, before fitting of the intermediate rings, either by threading them on the side members from the location of a flange (dismantled), or by introducing them from bias between the side members.
  • a first drawback comes from the fact that the intervals between bars, which are maintained above a minimum value by lateral abutment spans, see the games being distributed erratically within a group; it can happen that all the games of the group accumulate on a particular interval, where the passage of combustion air will be favored.
  • the intermediate parts fixed in overhang by the bolting of one end can break by the actions more or less combined fuel load and asymmetric heating.
  • the longitudinal members 10, 10 ', 10' ', 10 ′′′ are found in even number on the periphery of the structural cage (here the longitudinal members have an angular spacing of 45 °). Bars 11, 11 ', 11' ', 11 ′′′ ...
  • the bar has, between the regions of its first 112 and second 115 ends, a T-section, with an outer face 110, which follows the lining cylinder and forms the wings of the T, and a core 111 which forms a rib, in the general plane of the ring of which the bar 11 forms a part, perpendicular to the axis of the roller.
  • the first end 112 of the bar 11 is shaped on the end face in a plane parallel to the plane of the core of the spar, and is continued by a bearing face 112 a , capable of laying flat on the wing of the spar 10 ' (figure 2).
  • a bearing face 112 a capable of laying flat on the wing of the spar 10 ' (figure 2).
  • quarter-hemisphere recesses 114 and 114 ′ are provided, the hemisphere center being located substantially at the aforementioned virtual angle.
  • Below the bearing face 112 a is an engagement bevel 113, which is connected with the bearing face 112 by a flange made to abut on the edge of the spar wing.
  • the second end 115 is shaped on the end face, which overhangs the hooking notch 116.
  • the insertion of the bar 11 between the pair of beams 10, 10 ′ is carried out by presenting the notch 116 of the second end 115 of the bar on the wing of the beam 10, then by placing the bearing face 112 a on the wing of the spar 10 ', then by fitting the intermediate piece 12, as will be explained after the description of this piece.
  • the intermediate piece has a generally parallelepiped shape with an outer face 120, which will come close to the packing cylinder, an inner face 121 intended to lie flat on the spar, outside and inside being heard relative to the roller. grid, two lateral faces 121 and 122, corresponding to the end faces of the first bar end, and end faces 124 and 125.
  • bosses are complementary to the recesses 114 and 114 'in the terminal face of the first end of the bar 112.
  • the intermediate bosses (2-5) .128, (2-5) .129 have the form of halves of hemispheres, while the end bosses 1.128, 6.128, 1.129, 6.129 have the shape of quarters of hemispheres.
  • the centers of the hemispheres are located on the (virtual) edges between the upper face 120 and faces lateral 122 and 123, and follow one another longitudinally with a pitch equal to a width of bar 12 (taken parallel to the axis of the roll) increased by the width of an interval i.
  • the intermediate piece 12 determines, apart from the axial position of the first ends of the bars, relative to the spar. It is no longer possible for games to accumulate over an interval. It limits the travel of the bars 11 in the axial, radial and peripheral directions.
  • the intermediate piece 12 consists of two superposed elements, a base 127 which will rest on the spar 10 ', and a crown 130.
  • the base 127 is put in place first, and fixed to the beam 10 ', then the bars are put in place with the end face 112 of the first end contiguous to the lateral face of the base. Then the crown 130 is lowered so that its bosses are housed in the recesses 114, 114 'of the bars, and secured by bolting.
  • Figures 2 and 3 clearly show that an intermediate piece is used per group G of rings, and per pair of side members 10, 10 ', which requires, in this case, that the side members are of even number.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Incineration Of Waste (AREA)
  • Tunnel Furnaces (AREA)
  • Processing Of Solid Wastes (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Ceramic Products (AREA)
  • Solid-Fuel Combustion (AREA)
  • Fertilizers (AREA)
  • Disintegrating Or Milling (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Air Supply (AREA)
EP19900401364 1989-05-25 1990-05-22 Rouleau de grille de foyer, notamment pour incinération de déchets, avec un garnissage tubulaire formé d'anneaux de barreaux séparés par des intervalles de soufflage de largeur maintenue Expired - Lifetime EP0399898B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8906852A FR2647532B1 (fr) 1989-05-25 1989-05-25 Rouleau de grille de foyer, notamment pour incineration de dechets, avec un garnissage tubulaire forme d'anneaux de barreaux separes par des intervalles de soufflage de largeur maintenue
FR8906852 1989-05-25

Publications (2)

Publication Number Publication Date
EP0399898A1 EP0399898A1 (fr) 1990-11-28
EP0399898B1 true EP0399898B1 (fr) 1993-08-04

Family

ID=9382005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900401364 Expired - Lifetime EP0399898B1 (fr) 1989-05-25 1990-05-22 Rouleau de grille de foyer, notamment pour incinération de déchets, avec un garnissage tubulaire formé d'anneaux de barreaux séparés par des intervalles de soufflage de largeur maintenue

Country Status (12)

Country Link
US (1) US5057011A (da)
EP (1) EP0399898B1 (da)
AT (1) ATE92604T1 (da)
CA (1) CA2017451A1 (da)
CZ (1) CZ279417B6 (da)
DK (1) DK0399898T3 (da)
ES (1) ES2043308T3 (da)
FR (1) FR2647532B1 (da)
HU (1) HU209632B (da)
PL (1) PL163571B1 (da)
SK (1) SK278231B6 (da)
SU (1) SU1782301A3 (da)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5370530A (en) * 1993-03-24 1994-12-06 Italimpianti Of America, Inc. Rolls for high temperature roller hearth furnaces
US5362230A (en) * 1993-03-24 1994-11-08 Italimpianti Of America, Inc. Rolls for high temperature roller hearth furnaces
DE4316343A1 (de) * 1993-05-15 1994-11-17 Babcock Energie Umwelt Walzenrost für Verbrennungsanlagen
DE19952198A1 (de) * 1999-10-30 2001-05-10 Bbp Environment Gmbh Rostwalze für einen Walzenrost
CH697973B1 (de) * 2005-06-10 2009-04-15 Alstom Technology Ltd Rostwalze.
ITVI20060060A1 (it) * 2006-03-08 2007-09-09 B & B Elevators Srl Camera di combustione
RU185115U1 (ru) * 2018-07-03 2018-11-22 Александр Петрович Семенихин Колосник
WO2020009620A1 (ru) * 2018-07-03 2020-01-09 Александр Петрович СЕМЕНИХИН Колосник
RU202135U1 (ru) * 2020-07-29 2021-02-03 Антон Александрович Максимов Роторный колосник
CN112146443B (zh) * 2020-09-29 2022-05-13 中冶北方（大连）工程技术有限公司 一种烧结机台车篦条复位压辊

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1831816A (en) * 1929-10-26 1931-11-17 Charles B Magrath Heating device
US2501763A (en) * 1945-03-26 1950-03-28 Charles T Denker Solid fuel furnace of the rotary grate progressive feed type
FR1286528A (fr) * 1961-04-21 1962-03-02 Stadt Duesseldorf Installation d'incinération d'ordures ménagères
DE1164014B (de) * 1962-05-25 1964-02-27 Ver Kesselwerke Ag Rostwalze fuer Walzenrost zur Muellverbrennung
DE1260665B (de) * 1967-05-23 1968-02-08 Ver Kesselwerke Ag Rostbelag fuer die Rostwalzen eines Walzenrostes in Muellverbrennungsanlagen
CH637198A5 (de) * 1979-03-14 1983-07-15 Widmer & Ernst Ag Feuerungsrost fuer verbrennungsoefen.
DE3316363A1 (de) * 1983-05-05 1984-11-08 Deutsche Babcock Anlagen Ag, 4200 Oberhausen Walzenrost fuer muellverbrennungsanlagen
DE3341835A1 (de) * 1983-11-19 1985-05-30 Deutsche Babcock Anlagen Ag, 4200 Oberhausen Rostbelag fuer feuerungsroste mit umlaufend bewegten rostbrennbahnen
DE3420020A1 (de) * 1983-12-23 1985-07-04 Müllverbrennungsanlage Wuppertal GmbH, 5600 Wuppertal Roststab sowie rostwalze fuer den walzenrost z.b. einer muellverbrennungsanlage oder dergleichen

Also Published As

Publication number Publication date
FR2647532A1 (fr) 1990-11-30
CZ279417B6 (cs) 1995-04-12
EP0399898A1 (fr) 1990-11-28
SU1782301A3 (ru) 1992-12-15
HUT56936A (en) 1991-10-28
CA2017451A1 (fr) 1990-11-25
SK278231B6 (en) 1996-05-08
CS9002538A2 (en) 1991-10-15
ATE92604T1 (de) 1993-08-15
HU209632B (en) 1994-09-28
US5057011A (en) 1991-10-15
ES2043308T3 (es) 1993-12-16
FR2647532B1 (fr) 1991-09-06
PL163571B1 (en) 1994-04-29
HU903184D0 (en) 1990-10-28
DK0399898T3 (da) 1993-12-06

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