WO2010059669A1 - Grille modulaire pour incinérateur de déchets - Google Patents

Grille modulaire pour incinérateur de déchets Download PDF

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Publication number
WO2010059669A1
WO2010059669A1 PCT/US2009/064911 US2009064911W WO2010059669A1 WO 2010059669 A1 WO2010059669 A1 WO 2010059669A1 US 2009064911 W US2009064911 W US 2009064911W WO 2010059669 A1 WO2010059669 A1 WO 2010059669A1
Authority
WO
WIPO (PCT)
Prior art keywords
grate
block
blocks
wear plate
wear
Prior art date
Application number
PCT/US2009/064911
Other languages
English (en)
Inventor
Arthur W. Cole
John E. Cannon
Original Assignee
Wheelabrator Technologies, Inc.
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 Wheelabrator Technologies, Inc. filed Critical Wheelabrator Technologies, Inc.
Priority to CA2743248A priority Critical patent/CA2743248A1/fr
Priority to EP09756384A priority patent/EP2366080A1/fr
Publication of WO2010059669A1 publication Critical patent/WO2010059669A1/fr

Links

Classifications

    • 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
    • F23G5/44—Details; Accessories
    • F23G5/442—Waste feed arrangements
    • F23G5/444—Waste feed arrangements for solid waste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H17/00—Details of grates
    • F23H17/02—End fittings on bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H7/00—Inclined or stepped grates
    • F23H7/06—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding
    • F23H7/08—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding reciprocating along their axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2700/00—Grates characterised by special features or applications
    • F23H2700/002—Inclined grates with longitudinally movable gratebars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2900/00—Special features of combustion grates
    • F23H2900/17002—Detachable or removable worn-out parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble

Definitions

  • This invention relates to grate blocks, which are a key feature of modern waste to energy plants that incinerate refuse and capture the energy released as steam for generating electricity.
  • the combustion grate which is made up of a plurality of individual grate blocks, is exposed to high thermal stresses, particularly certain individual portions thereof such as the front face of the individual grates.
  • the operator of municipal waste mass burning applications typically has no control over the composition of the trash being fed into the system.
  • one section of the grate can have a pile of wet yard waste while another section can have bags of high caloric or energy content plastic containers.
  • the grate structure Due to the dual function of the combustion grate as a combustion support with ventilating means and also as a transfer or conveyance means for the material to be burned, the grate structure often includes such features as alternating fixed and movable grate sections and is a relatively complex multi-part structure. By having a uniform distribution of air beneath the grate, the basic design and operation ensures adequate oxygen for good combustion and cooling.
  • the grate area and length is selected for sufficient residence time to allow for complete burnout, generally less than 2 percent unburned carbon content remains in the ash residue.
  • There are numerous factors in the combustion process that are monitored and/or attempted to be controlled. One such factor or boundary condition that is attempted to be controlled is the grate temperature.
  • the specific control intervention involves establishing combustion temperature controls such that the average temperature of the grate layer does not exceed 300 0 C with a combustion temperature of, for example, 1000 0 C.
  • a combustion temperature for example, 1000 0 C.
  • Local overheating of the grate layer due to heat accumulation leads to increased corrosion and an increased scale formation rate. This results in excess wear of parts of the grate within a relatively short time and extensive annual maintenance. In these annual maintenance periods, large segments of grate parts are replaced.
  • the prior art has recognized one preventative measure for preventing high corrosion or scaling rates and the resulting increased mechanical wear which leads to the premature destruction of larger segments of grate block is provided by cooling off the grate blocks.
  • cooling off the grate blocks There are several techniques for cooling including passing a coolant such as water through a chamber in the grate blocks and forcing air through the grate blocks.
  • the cooling air is additionally used as the primary combustion air.
  • the control of the primary combustion air is also a temperature control measure.
  • the under grate blast generally flows against the grate layer first and air passage openings in the layer, which allows the cooling medium to pass into the refuse bed to be burned where it then participates in the combustion process as the primary combustion air.
  • Clogging of the air openings leads to reduced flow and increased back pressure in the cooling air path and, consequently, to accumulation of heat at the particular point of the grate layer. This leads to thermal overstressing of the grate part, increased wear, higher scaling rates and, within a short time, the failure of portions of the grate.
  • Our invention solves the above-stated problems by providing an improved modular grate block that has at least one wear plate attached to the front face of the grate block.
  • This wear plate is designed to be removed and replaced with a new wear plate and thus avoiding the cost and waste associated with replacing the entire grate block.
  • Our invention eliminates the wasteful and expensive practice of discarding individual grate blocks that are worn from the high temperatures and corrosive environments found in refuse incinerators. More specifically, our invention is directed to providing individual modular grate blocks that have at least one wear plate, which is preferably attached to the front face of the grate block.
  • the grate system of our invention preferably has a plurality of rows of fixed grate blocks and a plurality of rows of movable grate blocks alternating back and forth with each individual block having a removable wear plate as described in more detail below.
  • a reciprocal mechanism is connected to each of the rows of moveable grate blocks for moving the rows relative to the rows of the fixed grate blocks.
  • Each of the modular grate blocks has a top section, a front face, and a pair of side walls. Each side wall extends from the top section and the front wall. Each of the side walls of the grate blocks engage the side wall of the adjacent grate block.
  • the at least one wear plate is attached to the front face, it is within the scope of our invention to have a wear plate attached to the top section.
  • Each grate block has a paw portion located at the lower surface of the side section wall and front face. In a preferred embodiment, the wear block extends below the paw and engages a top section of a grate block directly in front and underneath.
  • the wear plate our invention is preferably made of a material that is different than the material used to fabricate the grate block body.
  • the wear plate comprise a harder material and more corrosion resistant than the block body.
  • harder or hardened materials are typically heavier and have higher costs associated therewith, these negatives are minimized because only the wear plate is made of such hardened materials. Indeed, it would be cost prohibiting to fabricate the unitary prior art blocks from hardened materials.
  • the preferred materials of construction that resist wear and corrosion include chrome-nickel alloys, stainless steels, ceramics, titanium and like materials.
  • Another feature of the modular grate blocks of our invention is the removability of the wear plates, especially when worn wear plates must be replaced with new wear plates.
  • a press fit connection between the backside of the wear plate and the front surface of the face wall of the grate block.
  • One type of press fit connection that is particularly preferred is where a male protrusion or nub on the wear plate engages a corresponding slot in the front wall of the block body.
  • the dimensions of the nub and slot are chosen such that nub is held in the slot by friction, thus preventing the wear plate from moving in either a vertical or horizontal manner.
  • a most preferred configuration is where the nub slides into a cup shaped slot that is tapered to provide the friction press fit.
  • the nub and slot could form a "dovetail" type joint or connection.
  • the wear plate can be fabricated to match exactly the dimensions of the front wall of the grate block or it can be smaller or larger than the front surface of the front wall.
  • the wear plate should match the side walls and the top wall, but extend beyond the paw or lower edge of the front face. In this manner the wear plate becomes the bearing surface for contacting the top surface of the grate block positioned in front and underneath. This will prevent the paw of the grate block from wearing because the bottom of the wear plate makes the contact with the top wall of the grate block disposed beneath.
  • Our invention also encompasses methods for retrofitting an existing incinerator grate system where prior art grate blocks, which do not have wear plates, are inspected, identified as being worn, and then removed and replaced with the grate blocks of our invention that have at least one wear plate.
  • the entire grate system can be changed out with a system having the modular grate blocks of our invention.
  • our invention is directed to a method where an incinerator grate block system is inspected to identify blocks having worn wear plates and then replacing those worn wear plates with new wear plates without having to remove the individual grate blocks.
  • the method involves locating worn wear plates, popping off the worn wear plate and snapping on a new wear plate, while leaving the grate block body attached to the system.
  • This method of repair is cost effective in that labor is greatly reduced as well as the cost of the wear plate compared to the cost of replacing the entire grate block.
  • the incinerator downtime is greatly reduced as is the frequency of the planned maintenance because the wear plate can be fabricated with a longer lasting material of construction.
  • FIG. 1 is a schematic of a combustion furnace
  • FIG. 2 is a perspective view of a portion of the grate blocks with a portion of the grate blocks removed;
  • FIG. 3 is a partial side elevation, in partial section, illustrating grate blocks in accordance with the invention assembled in a grate layer;
  • FIG. 4 is a partial perspective side and top view of the front portion of a grate block of our invention having attached a wear plate;
  • FIG. 5 a partial perspective side and bottom view of the front portion of a grate block of our invention having attached a wear plate;
  • FIG. 6 is a partial perspective side and bottom view of the front portion of a grate block of our invention showing the wear plate removed from the front wall and showing the nub and slot connection;
  • FIG. 7 is a partial perspective side and top view of the front portion of an alternative grate block of our invention having attached a wear plate;
  • FIG. 8 a partial perspective side and bottom view of the front portion of an alternative grate block of our invention having attached a wear plate;
  • FIG. 9 is a partial perspective side and bottom view of the front portion of an alternative grate block of our invention showing the wear plate removed from the front wall and showing an alternative nub and slot connection;
  • the grate block according to the invention is a modular block with at least one removable wear plate.
  • the overall design of the complete grate block is to direct air flow to allow for generally uniform burning of trash or refuse without thermal stress caused by intense combustion and cooling.
  • a combustion furnace 20 has trash, also referred to as refuse or fuel, fed via a refuse feed chute 22.
  • the trash is typically not homogeneous and can include wet yard waste, non-combustible material, and high energy content or caloric material.
  • the trash drops upon a feed table 24, on which a pusher ram 26 is moved back and forth by a drive 28.
  • the feed table 24 is adjoined at the same height by the start of a grate 32 having a plurality of grate blocks 40 which consists of fixed rows 44 arranged stepwise and movable rows 46 arranged in-between the fixed rows 44.
  • the movable rows 46 are shown in FIG.
  • each of the hoppers 34 is capable of gathering any trash or ash that falls through the grate 32. It is not typical for large amounts of trash or ash to fall through the grate 32 unless one of the grate blocks 40 fails.
  • each of the hoppers 34 is connected to an air source, such as a primary air fan 36 as seen in FIG. 1. The air from the air source passes through openings in the grate block 40, as described below, to a combustion chamber 38.
  • FIG. 1 shows two hoppers 34, but the combustion furnace 20 typically has as many as four hoppers 34 in a trash conveying direction. Depending on the width of the combustion furnace, the furnace can typically have 1 to 6 hoppers in the direction perpendicular to the conveying direction.
  • the trash i.e., the fuel
  • the movement of the movable rows 46 is accomplished by hydraulics or a motor driven actuator.
  • the movable rows 46 over each hopper 34 are controlled as a unit and the units can each be controlled individually.
  • the combustion furnace 20 can have the rate of movement of each section or unit of movable rows 46 be at a different rate.
  • the combustion furnace 20 has the combustion chamber 38 arranged above the grate 42.
  • the grate according to the present invention is designed such that the combustion takes place with primary air passing through the grate blocks 40 from the hoppers 34. Secondary air is admitted to the combustion chamber 38 above the grate 32 and the trash through the upper portion of the chamber such as represented by an arrow 66.
  • the combustion furnace 20 with the grate block 40 arrangement as described above operates with combustion air which passes through openings in the grate blocks 40.
  • the combustion chamber 38 is under reduced pressure which causes combustion air from the hopper, which is under positive pressure by the primary air fan 36, to be forced through the openings 120 in the grate blocks 40 as seen in FIGS. 4 & 7.
  • Sharply defined combustion conditions can be set by means of proper air distribution.
  • the combustion chamber 38 can be operated at -0.1 inches of pressure, which maintains a negative pressure that prevents smoke and exhaust from entering the building through penetration and openings in the combustion furnace and the hopper 22.
  • the combustion furnace 20, can preferably be designed with an after-burning chamber in which very high temperatures decompose any unburned pollutants thermally to produce harmless gases and are generated as a result of radiant heat and good insulation.
  • the combustion furnace 20 can also operate without an additional flame, due to the controlled trash feed and transport on the grate; the trash rate can be reliably controlled at any time, so that defined temperatures and combustion conditions can be achieved even with trash having widely varying properties.
  • FIG. 2 shows a portion of the grate 32 in a perspective view, with some of the grate blocks 40 removed.
  • the grate 32 is sloped downwards in the direction of the conveyance, as represented by an arrow 68.
  • the grate 32 can be formed of several modules 80 in the direction perpendicular to the conveying direction, wherein each module overlies a hopper.
  • Each module 80 has a pair of side wall blocks 70 and 72 that are stably connected to each other by a plurality of tensioning rods 74. These tensioning rods 74 extend perpendicular and extend across the inside width between the pair of side wall blocks 70 and 72.
  • the tensioning rods 74 are threaded at each end and extend through openings in the pair of side wall blocks 70 and 72.
  • the tensioning rods 74 are secured to the pair of side wall blocks 70 and 72 by a plurality of nuts on the threaded ends.
  • the tensioning rods 74 also serve as supporting rods for the group of stationary grate blocks 40 that receive the rod 74 through a support rib.
  • a shorter tensioning rod extends through the grate blocks 40 of the movable row 46.
  • a movable row 46 of grate blocks 40, moving in the direction opposite the conveyance, is located on the first fixed row 44.
  • the front under edge of grate blocks 40 of the movable row 46 rests on the grate blocks 40 of the first fixed row 44 below.
  • the front under edge of the next highest fixed row 44 rests in turn on the movable grate blocks 40 and so on. While the grate 32 is shown having a slope, such that there is a change in vertical height from one end to the other of the grate, it is recognized that the slope can be horizontal (i.e., having no slope).
  • the grate blocks 40 for both the moveable rows 46 and the fixed rows 44 have a hook portion at the rear of the block that are each received by a respective block holding tube 92.
  • the block holding tube 92 for the fixed rows 44 are each supported by at least a pair of support ribs 93. Each support rib 93 is carried by a support rail 94 as seen in FIG. 2 that extends parallel with the conveyance direction.
  • block holding tube 92 for the movable rows 46 are each supported by support ribs 95 and a carriage rail 96.
  • the block holding tube 92, the support ribs 93 and 95 and the rails 94 and 96 are shown in further detail in FIG. 3. As indicated above with respect to FIG. 1 , the area underneath the grate
  • the 32 has a plurality of hoppers 34. These hoppers define several distinct zones as represented by the grate modules 80. In addition to being able to vary the stroke rate of the movable rows 46, the hoppers are distinct in that the air flow underneath the grate can be adjusted to each region defined by the hoppers 34. Primary air is blown into the individual zones by means of the primary air fan 36 with adjustable dampers, and this air then reaches the combustion chamber through the openings in the grate block 40. As further illustrated in FIG. 3, the combustion furnace 20 has the plurality of block holding tubes 92. The block holding tubes 92 for the fixed rows 44 are each supported by the support ribs 93 carried by the support rail 94.
  • the block holding tubes 92 for the movable rows 46 are each supported by the support ribs 95 carried by the carriage rail 96.
  • the grate blocks 40 are mounted on bearing means 92 which are supported on supports 94 and 96, and the blocks 40 being rotatable relative to the block holding tube 92.
  • the movable rows 46 can be adjusted in stroke rate by the movement of the carriage rail 96 by the actuator 92.
  • the tensioning rods 74 are provided to support the blocks 40 and are coupled together so that the blocks are movable in groups and are combined together perpendicular to the longitudinal direction or the direction of conveyance of the grate assembly 32.
  • the grate block 40 has an top wall 100, a front wall 102, and can have an angle corner wall 104, which is interposed between the top wall 100 and the front wall 102.
  • the grate block has a projecting arm 106 that extends under the overlying grate block 40.
  • the arm has a hook 108 that receives the support rod 92.
  • the top wall 100 has a thickened portion 110 on which a paw 112 of the front wall 102 of the block above moves relative to the lower block.
  • the grate block 40 also has a pair of side walls 114.
  • the projecting arm 106 has the hook 108 for receiving the support rod 92.
  • the top wall 100 has a thickened portion 110 upon which the paw 112 of the overlaying grate block 40 rests.
  • the side wall 114 has an alignment pin hole 130 for accepting an alignment pin for securing adjacent grate blocks together.
  • Front wall 102 has attached wear plate 200 each with a bottom edge 203.
  • FIGS. 4-6 and FIGS. 7-9 show two of the many possible configurations of wear plates 200 removably attached to front wall 102 of grate block body 40. As mentioned, it is also within the scope of our invention to have wear plates attached to the top wall of the grate block.
  • the wear plate extends down below the bottom edge of paw 112 to act as a bearing surface for contact on the top wall of another grate block in the system as shown in FIGS. 2 & 3. Because bottom edge 203 of wear plate 200 is the only portion of the grate block in contact with the top wall of the other grate block, this prevents wear to paw 112. This is clearly shown in FIGS. 5 & 8 where when viewed from the underneath side of grate block 40, lower edge 203 of wear plate 200 extends beyond the bottom edge of paw 112.
  • Top edge 201 of wear plate 200 is shown matching the angle of inclination defined by corner wall 104 of top wall 100, however, other designs where the angle is not matched are possible.
  • Wear plate 200 also has holes 120 to allow combustion air to flow from underneath grate block 40. This flow of combustion air not only supplies the oxygen necessary for combustion, but also acts a heat transfer medium to cool the grate block and attached wear plate.
  • FIGS. 6 & 9 illustrate two possible connection designs to removably secure backside 207 of wear plate 200 to front surface 206 of grate block 40. As mentioned, any connection design can be used to secure the wear plate to the front wall of the block body, provided that it is not a permanent connection.
  • connection between the wear plate and the grate block is releasable so that during a shutdown of the incinerator a maintenance worker can replace a worn wear plate with a new wear plate without removing individual grate blocks from the system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Incineration Of Waste (AREA)

Abstract

La présente invention concerne un bloc grille modulaire amélioré pour un incinérateur, comprenant une plaque d'usure amovible (200) qui peut être remplacée sans enlever des blocs grille individuels d'une pluralité de rangées de blocs grille fixes (44) et mobiles (46).
PCT/US2009/064911 2008-11-20 2009-11-18 Grille modulaire pour incinérateur de déchets WO2010059669A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA2743248A CA2743248A1 (fr) 2008-11-20 2009-11-18 Grille modulaire pour incinerateur de dechets
EP09756384A EP2366080A1 (fr) 2008-11-20 2009-11-18 Grille modulaire pour incinérateur de déchets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/313,429 US20100122643A1 (en) 2008-11-20 2008-11-20 Modular grate block for a refuse incinerator
US12/313,429 2008-11-20

Publications (1)

Publication Number Publication Date
WO2010059669A1 true WO2010059669A1 (fr) 2010-05-27

Family

ID=42101344

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/064911 WO2010059669A1 (fr) 2008-11-20 2009-11-18 Grille modulaire pour incinérateur de déchets

Country Status (4)

Country Link
US (1) US20100122643A1 (fr)
EP (1) EP2366080A1 (fr)
CA (1) CA2743248A1 (fr)
WO (1) WO2010059669A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101922715A (zh) * 2010-09-01 2010-12-22 重庆科技学院 两段式垃圾焚烧炉

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Publication number Priority date Publication date Assignee Title
PT2584264E (pt) * 2011-10-21 2014-08-29 Martin Umwelt & Energietech Módulo com vários níveis de grelhas para uma grelha de incineração deslizante
CN104534481B (zh) * 2014-12-26 2016-09-21 南通天蓝环保能源成套设备有限公司 一种组合式大型生活垃圾焚烧炉
JP6734302B2 (ja) * 2015-06-12 2020-08-05 ヒタチ ゾウセン イノバ アクチェンゲゼルシャフト 燃焼火格子用の火格子ブロック
GB2552163B (en) * 2016-07-11 2021-06-16 Clean Thermodynamic Energy Conv Ltd Combustion kiln system and method of operating the same
US10816197B2 (en) * 2018-12-07 2020-10-27 Eco Burn Inc. System for the dynamic movement of waste in an incinerator
CN110686262B (zh) * 2019-10-09 2023-12-22 科能亚太铸造（武汉）有限公司 一种垃圾焚烧用炉条及垃圾焚烧处理装置
CN111780127B (zh) * 2020-08-07 2021-08-17 上海轻叶能源股份有限公司 一种垃圾焚烧炉燃烧管理系统

Citations (4)

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Publication number Priority date Publication date Assignee Title
US4078883A (en) * 1975-07-04 1978-03-14 Claudius Peters Ag Grate plate with replaceable wear surfaces devoid of independent connectors
US6302038B1 (en) * 1996-11-27 2001-10-16 Daewoo Engineering And Construction Corporation Anti-erosion system of grate in stoker-type incinerator
FR2894012A1 (fr) * 2005-11-28 2007-06-01 Cometal France Sarl Barreau pour grille de four d'incineration
WO2009023977A2 (fr) * 2007-08-22 2009-02-26 Doikos Investments Limited Plaque de grill à refroidissement par un liquide, présentant des plaques d'usure, et grill à gradins formé de telles plaques de grill

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US4201545A (en) * 1977-03-31 1980-05-06 Dieter Riechert Grate with replaceable wear elements
IT1235900B (it) * 1985-10-11 1992-12-02 Vaifro Vittorio Bonomelli Griglia di combustione a gradini mobili per combustibili solidi in particolare rifiuti solidi urbani e assimilabili
DE9417515U1 (de) * 1994-10-31 1996-02-29 Babcock Materials Handling Division GmbH, 21614 Buxtehude Schubrost für Klinkerkühler
US5538539A (en) * 1995-01-20 1996-07-23 Wahlco, Inc. Catalytic sulfur trioxide flue gas conditioning
DE19504588B4 (de) * 1995-02-11 2006-07-13 Khd Humboldt Wedag Gmbh Rostplatte für Schubrostkühler zum Abkühlen von heißem Gut

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4078883A (en) * 1975-07-04 1978-03-14 Claudius Peters Ag Grate plate with replaceable wear surfaces devoid of independent connectors
US6302038B1 (en) * 1996-11-27 2001-10-16 Daewoo Engineering And Construction Corporation Anti-erosion system of grate in stoker-type incinerator
FR2894012A1 (fr) * 2005-11-28 2007-06-01 Cometal France Sarl Barreau pour grille de four d'incineration
WO2009023977A2 (fr) * 2007-08-22 2009-02-26 Doikos Investments Limited Plaque de grill à refroidissement par un liquide, présentant des plaques d'usure, et grill à gradins formé de telles plaques de grill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101922715A (zh) * 2010-09-01 2010-12-22 重庆科技学院 两段式垃圾焚烧炉

Also Published As

Publication number Publication date
EP2366080A1 (fr) 2011-09-21
CA2743248A1 (fr) 2010-05-27
US20100122643A1 (en) 2010-05-20

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