EP0157920A2 - Rouleau de grille pour grille à rouleaux par exemple d'une installation d'incinération des ordures ou similaire - Google Patents

Rouleau de grille pour grille à rouleaux par exemple d'une installation d'incinération des ordures ou similaire Download PDF

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Publication number
EP0157920A2
EP0157920A2 EP84114826A EP84114826A EP0157920A2 EP 0157920 A2 EP0157920 A2 EP 0157920A2 EP 84114826 A EP84114826 A EP 84114826A EP 84114826 A EP84114826 A EP 84114826A EP 0157920 A2 EP0157920 A2 EP 0157920A2
Authority
EP
European Patent Office
Prior art keywords
grate
roller
bars
web
wall
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.)
Granted
Application number
EP84114826A
Other languages
German (de)
English (en)
Other versions
EP0157920B1 (fr
EP0157920A3 (en
EP0157920B2 (fr
Inventor
Sedat Dipl.-Ing. Temelli
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.)
AWG ABFALLWIRTSCHAFTSGESELLSCHAFT MIT BESCHRAENKTE
Original Assignee
Awg Abfallwirtschaftsgesellschaft Wuppertal mbH
Mullverbrennungsanlage Wuppertal GmbH
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.)
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Publication date
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Application filed by Awg Abfallwirtschaftsgesellschaft Wuppertal mbH, Mullverbrennungsanlage Wuppertal GmbH filed Critical Awg Abfallwirtschaftsgesellschaft Wuppertal mbH
Publication of EP0157920A2 publication Critical patent/EP0157920A2/fr
Publication of EP0157920A3 publication Critical patent/EP0157920A3/de
Publication of EP0157920B1 publication Critical patent/EP0157920B1/fr
Application granted granted Critical
Publication of EP0157920B2 publication Critical patent/EP0157920B2/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
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L1/00—Passages or apertures for delivering primary air for combustion 
    • F23L1/02—Passages or apertures for delivering primary air for combustion  by discharging the air below the fire
    • 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
    • F23B1/165—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support using roller grate
    • 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
    • F23G5/002—Incineration of waste; Incinerator constructions; Details, accessories or control therefor characterised by their grates
    • 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
    • F23H9/00—Revolving-grates; Rocking or shaking grates
    • F23H9/02—Revolving cylindrical grates

Definitions

  • the invention relates to a grate bar and a grate roller equipped with grate bars for the grate of a waste incineration plant or the like burning unit.
  • a waste incineration plant in which the invention can be implemented for example, consists of a feed device with a reciprocating slide with which the waste is pushed into the combustion chamber through an opening in a filling shaft.
  • the waste In the firebox, the waste is exposed to intense flame radiation.
  • Downstream of the feed device is a roller grate in the firebox, which is designed as a sloping grate and consists of five or six grate rollers of approximately 1.5 m in diameter arranged one behind the other in an approximately 30 ° inclined plane in the transport direction, so-called pockets being formed between the grate rollers.
  • the most important design features of the grate rollers are usually a hollow shaft mounted on both sides and a cylindrical support structure with radial walls for holding the axially extending grate bar supports, on which the circular-shaped grate bars made of cast iron bars are lined up side by side and one behind the other, with slots remaining free between adjacent bars.
  • the grate bars form the jacket of the grate roller or the so-called grate covering. Due to the rotation of the grate roller, they are only temporarily exposed to fire and can cool down again in the air zones.
  • Guide walls are arranged between the grate rollers, which seal the rollers from one another and form pockets together with the grate rollers by turning the garbage.
  • the roller grate is embedded in a sheet metal housing divided for each grate roller.
  • the air is supplied to these zones from the side in controllable quantities.
  • the air should pass from the zones through the grate and the fuel bed into the combustion chamber.
  • the drying and ignition of the easily combustible components have started.
  • the garbage falls into the pocket formed by the first guide wall and the first grate roller as a disk or chunk of low thickness.
  • the garbage accumulates here and sinks down in the bag until the slowly rotating grate roller carries the material adhering to its surface out of the bag from below. It reaches the second one via the grate roller
  • the air distribution is adjusted to this combustion pattern with the adjustable underwind zones.
  • the amount of air added is low in the drying and ignition zone. It reaches its maximum in the main combustion zone and decays to a minimum in the burnout zone.
  • roller grate is designed so that the amount of air required for combustion is passed through the roller basket between the grate bars to the firing material lying on the roller.
  • this structurally provided combustion process is hampered by the deposits and smears in the roller cage.
  • the grate bars of known grate rollers consist of a relatively narrow, from the side, arcuate web with two side walls, a head and a foot wall as well as a fire-side outer web wall and an inner web wall on the inside of the roller.
  • projecting tooth-like projections are arranged on each side wall at a regular distance from each other parallel to the direction of the axis of the grate roller, each projection of one side wall being positioned diagonally to the projection of the other side wall and the projections of a grate bar into the gaps between the projections of a grips laterally adjacent other grate bar, leaving a gap between adjacent grate bars of about 5 mm in width. As described, this gap is intended for the supply of air.
  • the grate bars are shaped so that they can be placed one behind the other in the circumferential direction on the grate bar supports and stored there in a stationary manner.
  • the gaps between adjacent grate bars cannot be kept much narrower.
  • the width of the gaps is in turn responsible for the fact that relatively thin, still unburned refuse components can get through the gaps into the interior of the roller, which results in the effects described.
  • the object of the invention is to provide means with which the penetration of relatively thin products from the waste to be incinerated can be avoided.
  • the roller grate 2 has a feed device 1 through which the waste (not shown) is pushed onto a roller grate 2 inclined in the transport direction.
  • the roller grate 2 is constructed from a plurality of rotatable grate rollers 3 arranged side by side in the transport direction, pockets 4 being formed between adjacent grate rollers.
  • the roller grate 2 is embedded in a sheet metal housing 5 divided for each grate roller. Air is supplied to these zones from the side in controllable quantities. Since all other parts of the waste incineration plant are not related to the invention, they are not described because they are known.
  • Each grate roller 3 is laterally supported by a hollow shaft 6 in the corresponding
  • Sheet metal housing 5 (Fig. 2).
  • the cylindrical support structure of the grate roller is located between the bearings. It consists essentially of radially extending walls or support webs 7 on the hollow shaft at a distance from one another, on which the axially extending walls are arranged at a distance on the circumference of the roller. rest the grate bar support 8.
  • Roller baskets 9 are formed between the walls 7, in which, according to a feature of the invention, air baffles 10 are arranged obliquely to the longitudinal axis direction of the roller.
  • On the grate bar supports 8 are grate bars 11.
  • the lines 12 and arrows 13 in FIG. 2 indicate the air path that the air is to take from the sheet metal housing 5 through the grate roller 3 into the combustion chamber 14.
  • the other parts of a grate roller are for the Invention is immaterial, which is why they are not mentioned in this description.
  • a grate bar 11 according to the invention is of cross-section (FIG. 4i, essentially T-shaped and consists of the transverse web 15 and the base web 16. It has the outer web wall 17 and the inner web wall 18 as well as the side walls 19 and 20, the head wall 21 and the foot wall 22, the crossbar being provided with side edge surfaces 23 and 24.
  • the design of the head and foot walls is known and is insignificant for the invention, for which reason it is not explained.
  • a grate roller according to the invention is characterized in that it is equipped with grate bars according to the invention and the gap 25 between adjacent grate bars on the combustion chamber side at the edges 26 is approximately 2 millimeters, in particular 1 millimeter and less. It can be advantageous here if the individual rolls have different gap widths, depending on their position in the combustion zone. Here, the smallest gap width should be present in the roller, which is arranged in the main combustion zone, since there the slag is usually the most liquid, so that there is the greatest risk that the liquid slag can run into the interior.
  • the rolls with the larger gap width have manufacturing advantages because they can be manufactured with larger tolerances.
  • the side walls 19 and 20 lead in the upper third with an arch 28 to the edge 27, which creates a kind of pointed vault 29 between adjacent grate bars (FIG. 5). It is also advantageous if the base web 16 widens evenly upwards, the widening possibly extending without an arch up to the edge 27. The latter features support the action of the slots 25.
  • the primary air supply can be carried out through the 2 mm wide and narrower grate gaps 25.
  • the nozzle-shaped column 25 increases the air speed, in particular in combination with the arch shape 29, so that care is taken to ensure that the rust roller nips 25 remain free during operation for the supply of the primary air, which is one of the most important physical components for the combustion.
  • the invention ensures a balanced distribution of the combustion air over the entire grate surface of the individual rollers. In particular, gap widths of less than or equal to 1 millimeter in width counteract the dripping of the melts due to the surface tension of light metal melts.
  • a certain flow rate is achieved which prevents the liquid slag from clogging the grids or from penetrating into the roller.
  • This flow rate depends largely on the ratio of the gap width to the distance between the base webs 16.
  • a ratio of 1/25 to 1/50 [gap width / distance] is expedient here
  • the shape of the new grate bars enables higher surface pressures so that the risk of breakage of a grate bar is minimized.
  • Defective bars are known to block the rollers and cause an emergency shutdown of a system, which leads to considerable economic disadvantages.
  • the width of the transverse webs 1 is preferably forty to forty-eight mm and the base webs 16 is approximately 18 mm, in particular twenty to twenty-five gaps being provided per meter of the roll length.
  • the prescribed cleaning intervals according to the manufacturer's instructions are about 4000 hours. With the new grate roller, self-cleaning takes place through primary air supply. The cleaning time of around 250 hours per roller required according to previous experience can be omitted.
  • wipers 30 made of steel bristles 31 between the adjacent rollers 3 in the pockets 4, which are fastened next to one another in a clamping rail 32.
  • the length of the wipers corresponds to the roller length.
  • the distance between the bristles 31 is preferably 10 to 15 mm, the diameter is in particular 20 to 25 mm.
  • the distance between the free bristle ends and the roller surface is approximately 10 to 15 mm.
  • the advantage achieved by using the bristle wipers over the known wipers formed from sheet metal is the flexibility achieved, since jamming of foreign bodies in the gap between the roller and wiper can practically no longer occur. This largely prevents damage to the roller grate bars and the roller drive.
  • the greater permeability of the bristles also improves ventilation of the gusset space between the rollers.
  • the invention thus takes a path that is opposite to that of the prior art.
  • the previous teaching required the widest possible gaps between the grate bars so that sufficient air can be passed through.
  • the gaps are narrowed, but the shape of the grate bars ensures that the primary air is forced through the gaps at high speed, so that no substances are removed from the garbage for long periods can penetrate into the interior of the roller through the gaps and also cannot smear the gaps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Incineration Of Waste (AREA)
EP84114826A 1983-12-23 1984-12-06 Rouleau de grille pour grille à rouleaux par exemple d'une installation d'incinération des ordures ou similaire Expired - Lifetime EP0157920B2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3346747 1983-12-23
DE3346747 1983-12-23
DE19843420020 DE3420020A1 (de) 1983-12-23 1984-05-29 Roststab sowie rostwalze fuer den walzenrost z.b. einer muellverbrennungsanlage oder dergleichen
DE3420020 1984-05-29

Publications (4)

Publication Number Publication Date
EP0157920A2 true EP0157920A2 (fr) 1985-10-16
EP0157920A3 EP0157920A3 (en) 1987-05-20
EP0157920B1 EP0157920B1 (fr) 1989-07-26
EP0157920B2 EP0157920B2 (fr) 1995-05-31

Family

ID=25816737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114826A Expired - Lifetime EP0157920B2 (fr) 1983-12-23 1984-12-06 Rouleau de grille pour grille à rouleaux par exemple d'une installation d'incinération des ordures ou similaire

Country Status (4)

Country Link
US (1) US4610209A (fr)
EP (1) EP0157920B2 (fr)
CS (1) CS273159B2 (fr)
DE (2) DE3420020A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0399898A1 (fr) * 1989-05-25 1990-11-28 Tunzini Picard Thermique Environnement 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
EP0606551A1 (fr) * 1993-01-13 1994-07-20 RBU ROLF BECKER GmbH INGENIEURGESELLSCHAFT FÜR ENERGIE- UND UMWELTTECHNIK & CO. KG Grille à rouleaux pour une chaudière à combustion
EP0625675A2 (fr) * 1993-05-15 1994-11-23 Deutsche Babcock Energie- und Umwelttechnik Aktiengesellschaft Grille à rouleaux pour installations de combustion
EP0633432A1 (fr) * 1993-07-09 1995-01-11 Babcock Lentjes Kraftwerkstechnik GmbH Grille à rouleaux
EP1574784A1 (fr) 2004-03-09 2005-09-14 Fisia Babcock Environment GmbH Grille à rouleaux

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59005994D1 (de) * 1989-05-10 1994-07-14 Babcock Anlagen Ag Roststab und Rostwalze.
US5042401A (en) * 1990-06-04 1991-08-27 Westinghouse Electric Corp. Water cooled rolling grate incinerator
DE4322909A1 (de) * 1993-07-09 1995-01-12 Lentjes Kraftwerkstechnik Vorrichtung zur Aufgabe von Brennstoff auf einen Walzenrost
BR7900232U (pt) * 1999-02-03 2000-09-05 Vale Do Rio Doce Co Aperfeiçoamento em barra de grelha para fornos de pelotização e sinterização
AT410128B (de) * 2000-11-08 2003-02-25 Ferdinand Dipl Ing Tischler Rost für feste brennstoffe
DE102007020515B4 (de) 2007-04-29 2013-08-22 Wvt Breiding Gmbh Axial auf einen Walzenrost aufschiebbarer Roststab, Roststab-Satz und Walzenrost
CZ304869B6 (cs) * 2013-04-05 2014-12-17 Josa S.R.O. Rošt pro spalovací zařízení zejména pro spalování pelet na bázi biomasy
CN105465801B (zh) * 2016-01-05 2018-05-08 任丘市创新采暖设备有限公司 双向分料自动除渣旋转炉排
RU185323U1 (ru) * 2018-07-01 2018-11-30 Сергей Петрович Семенихин Колосник

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD19558A (fr) *
AT62478B (de) * 1911-03-14 1913-12-10 Augustus Francis Davis Roststab.
DE1164014B (de) * 1962-05-25 1964-02-27 Ver Kesselwerke Ag Rostwalze fuer Walzenrost zur Muellverbrennung
DE1526112A1 (de) * 1965-10-19 1970-01-08 Ver Kesselwerke Ag Walzenrost fuer Muellverbrennung sehr grosser Leistung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1961098A (en) * 1929-03-06 1934-05-29 Loraine L Denker Mechanical stoker
US2501763A (en) * 1945-03-26 1950-03-28 Charles T Denker Solid fuel furnace of the rotary grate progressive feed type
US3078839A (en) * 1961-02-17 1963-02-26 Earland R Mitchell Dump grate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD19558A (fr) *
AT62478B (de) * 1911-03-14 1913-12-10 Augustus Francis Davis Roststab.
DE1164014B (de) * 1962-05-25 1964-02-27 Ver Kesselwerke Ag Rostwalze fuer Walzenrost zur Muellverbrennung
DE1526112A1 (de) * 1965-10-19 1970-01-08 Ver Kesselwerke Ag Walzenrost fuer Muellverbrennung sehr grosser Leistung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0399898A1 (fr) * 1989-05-25 1990-11-28 Tunzini Picard Thermique Environnement 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
FR2647532A1 (fr) * 1989-05-25 1990-11-30 Picard Fours 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
US5057011A (en) * 1989-05-25 1991-10-15 Fours Picard Furnace grate roller namely for incinerating refuse with a tubular casing formed by rings of bars separated by blow gaps of set width
EP0606551A1 (fr) * 1993-01-13 1994-07-20 RBU ROLF BECKER GmbH INGENIEURGESELLSCHAFT FÜR ENERGIE- UND UMWELTTECHNIK & CO. KG Grille à rouleaux pour une chaudière à combustion
EP0625675A2 (fr) * 1993-05-15 1994-11-23 Deutsche Babcock Energie- und Umwelttechnik Aktiengesellschaft Grille à rouleaux pour installations de combustion
EP0625675A3 (fr) * 1993-05-15 1995-04-26 Babcock En Umwelt Grille à rouleaux pour installations de combustion.
EP0633432A1 (fr) * 1993-07-09 1995-01-11 Babcock Lentjes Kraftwerkstechnik GmbH Grille à rouleaux
DE4322908A1 (de) * 1993-07-09 1995-01-26 Lentjes Kraftwerkstechnik Walzenrost
EP1574784A1 (fr) 2004-03-09 2005-09-14 Fisia Babcock Environment GmbH Grille à rouleaux
DE102004011834A1 (de) * 2004-03-09 2005-10-06 Fisia Babcock Environment Gmbh Walzenrost

Also Published As

Publication number Publication date
EP0157920B1 (fr) 1989-07-26
EP0157920A3 (en) 1987-05-20
CS273159B2 (en) 1991-03-12
US4610209A (en) 1986-09-09
DE3420020A1 (de) 1985-07-04
CS1000684A2 (en) 1990-07-12
EP0157920B2 (fr) 1995-05-31
DE3420020C2 (fr) 1987-10-29
DE3479150D1 (en) 1989-08-31

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