EP3348903B1 - Bloc de grillage - Google Patents

Bloc de grillage Download PDF

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Publication number
EP3348903B1
EP3348903B1 EP18020007.3A EP18020007A EP3348903B1 EP 3348903 B1 EP3348903 B1 EP 3348903B1 EP 18020007 A EP18020007 A EP 18020007A EP 3348903 B1 EP3348903 B1 EP 3348903B1
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EP
European Patent Office
Prior art keywords
base element
head piece
grate block
grate
metal pin
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.)
Active
Application number
EP18020007.3A
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German (de)
English (en)
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EP3348903A1 (fr
Inventor
Christof Breitenmoser
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.)
ICE AG
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ICE AG
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Publication date
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Publication of EP3348903A1 publication Critical patent/EP3348903A1/fr
Application granted granted Critical
Publication of EP3348903B1 publication Critical patent/EP3348903B1/fr
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Classifications

    • 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
    • F23H11/00—Travelling-grates
    • F23H11/18—Details
    • F23H11/28—Replaceable burning-surface
    • 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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • 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

Definitions

  • the invention relates to a grate block for a grate of an incineration plant, in particular a waste incineration plant, and to a method for assembling and dismantling a grate block.
  • Grate blocks of this type are used in incinerators which have grates for conveying material to be burned through a combustion chamber. Especially in waste incineration plants, the grates are exposed to high thermal and mechanical loads due to the material to be burned.
  • the grates are usually formed by rows of grate blocks lying one on top of the other like roof tiles and arranged transversely to the transport direction of the material to be burned.
  • the grate blocks in a row are supported on the one hand with a molded foot on a running surface of the grate blocks in the row below and on the other hand on holding tubes attached under the grate blocks.
  • grate blocks in a row are usually connected to one another, for example by screw connections. This ensures that a row of grate blocks can be moved synchronously and, for example, individual grate blocks in a row are not lifted off by the material to be burned.
  • the high mechanical load is caused by the conveying movement of the grate blocks.
  • the high thermal load is due to the composition and properties of the fuel, such as size, weight, calorific value and burning behavior, which are constantly changing. In particular, the high loads on the front end of the grate blocks used, seen in the conveying direction, show their effect through mechanical and thermal wear.
  • the proposed two-part grate block should take this into account.
  • the EP 0 170 803 A1 discloses a grate block having a replaceable head attached to a support member. It is proposed to provide a detachable fastening of the components on the side of the grate block facing away from the material to be burned. Disadvantage of this version is that the grate block must be accessible from both sides in order to replace the head piece, or the grate block must be lifted out of the grate.
  • the DE 75 21 218 U1 also a grate block which is composed of two parts.
  • a head piece is pushed in or over onto a base plate from the side, transverse to the direction of transport of the material to be burned.
  • the attachment takes place in a form-fitting manner, the two components are designed in such a way that no further attachment is necessary.
  • the disadvantage of this design is that lateral insertion of a head piece onto the base plate is only possible when the grate block is in the removed or at least raised state.
  • the KR 101 326 481 B discloses a grate block composed of a base member and a plurality of headers.
  • the head pieces are screwed together via a connecting rod and inserted into the base element as a unit.
  • a disadvantage of the disclosed construction is that the screw connections become soiled or even worn out during operation, so that a single head piece cannot be removed.
  • the invention is now based on the object of proposing a grate block which avoids the disadvantages of known designs described above and ensures safe operation of the grate and allows easy replacement of the wearing parts of the grate block when the grate block is installed.
  • a grate block is provided with a base element and a head piece arranged on the base element, the base element at least has a projection directed in the direction of the headpiece and at least one support provided for the headpiece to rest on and provided with at least one passage opening.
  • the head piece has at least one recess directed towards the base element and at least one passage opening, the projection of the base element and the recess of the head piece being coordinated with one another so that the head piece can be positioned on the base element through their interaction, and the passage opening being in the support of the Basic element and the passage opening of the head piece are arranged concentrically one above the other.
  • a metal pin is provided for insertion into the passage openings and to secure the head piece to the base element, the metal pin is welded to the head piece.
  • the base element has a holding element for support on the holding tubes and a foot for support on the running surface of the nearest further base element arranged below the base element.
  • the projection attached to the base element interacts with the recess present on the head piece in such a way that the head piece assumes a specified position on the base element.
  • the projection can be designed as a rib or protuberance of a rib directed towards the head piece. This projection engages in the recess provided on the head piece.
  • the recess can be designed as a simple indentation or also as a rib. If the projection and recess are correspondingly shaped ribs, the head piece is positioned only in that direction in which the ribs engage. In cooperation with the supports of the base element on which the head piece rests, it is advantageous if the head piece is positioned in relation to the base element in a vertical direction against the running surface of the grate block.
  • the base element is provided with a protuberance against the headpiece shaped in such a way that it engages in a corresponding depression of the headpiece and the headpiece can thereby be positioned in several directions.
  • the head piece can advantageously be additionally supported on a foot arranged transversely to the conveying direction of the material to be burned in the base element.
  • the concentric arrangement of the through-openings in the support of the base element and in the headpiece makes it possible to insert a metal pin into the through-openings possible.
  • the shape of the metal pin corresponds to the shape of the passage openings.
  • the geometric shape can be circular or polygonal, for example.
  • a projection or recess is arranged at both ends of the base element and the head piece.
  • the head piece rests on the base element at three points.
  • the base element has two projections and two supports, each provided with a through-opening
  • the head piece has two recesses and correspondingly also two through-openings.
  • the two projection - recess - connections, as well as the supports of the base element can be provided on the base element and head piece. It has been shown that by using two metal pins to secure the head piece, the maximum possible width of the grate block can be used due to the head piece's own weight.
  • the passage openings are rectangular.
  • the arrangement of the rectangle is matched to the mechanical stress on the head piece. Since the movement of the grate block in the conveying direction of the kiln over the underlying grate block causes a higher load than in the transverse direction, the long side of the rectangle is directed against the conveying direction of the kiln.
  • At least one rib directed opposite to the head piece is provided below the passage opening in the base element.
  • the rib can be identical to a rib forming the projection on the base element.
  • a plurality of such ribs forming a projection is preferably provided, with at least one rib arranged below the through-opening serving in its shape as a stop for the metal pin inserted into the through-opening. This prevents the metal pin from falling through the passage opening. After the metal pin has been inserted into the through-openings, it is held in the through-openings by the rib.
  • the metal pin or the through-opening are shaped in such a way that the metal pin is held in the through-opening when it is inserted into the through-opening.
  • the molding is designed in such a way that the metal pin can be knocked out through the passage opening despite the molding when it is subsequently removed.
  • a corresponding burr can be formed on the metal pin or the passage opening can be provided with a corresponding narrowing of the cross section, which can also be released by breaking the weld.
  • the metal pin can be provided with a fall-through protection.
  • the metal pin can, for example, be provided with a welding point before installation, which is integrated into the weld seam when the metal pin is installed.
  • a wire or another tool that protrudes beyond the cross section of the metal pin can be welded to the metal pin or attached in some other way.
  • the metal pin can be inserted into the passage openings without the metal pin having to be held in its position by the opposite side. This aid is removed again after the metal pin has been assembled or welded to the head piece.
  • the dimensions of the metal pin can be matched to the dimensions of the passage openings in such a way that the metal pins can pass through a slight press fit is held in at least one of the passage openings.
  • the metal pins have a slightly larger cross section, at least in one direction, than the passage opening. It does not matter whether this is the case with respect to the through-opening in the support of the base element or the through-opening in the head piece.
  • the metal pin can be inserted into the passage opening without it having to be held by the opposite side.
  • the metal pin is clamped in the passage opening of the head piece. This means that a metal pin of the same type can be used with a new head piece. This would be more difficult if the base element were clamped in the passage opening of the support, since repeated use of the base element would mean that the oversize of the metal pin would have to be gradually increased.
  • the passage opening of the head piece has an enlargement on the side opposite the base element, for example in the form of a chamfer.
  • Such an enlargement of the cross section creates a groove between the metal pin and the head piece. This improves the subsequent welding of the metal pin to the head piece.
  • the head piece must be welded to the metal pin in such a way that the passage opening in the head piece is closed and forms a plane with the surface of the head piece.
  • the running surface of the base element is provided with a weld cladding. As a result, the service life of the basic element can be significantly increased.
  • the grate block has a width of 150 mm to 600 mm.
  • the number of grate blocks in a row that are necessary for equipping the grate can be significantly reduced.
  • multiples corresponding to the dimensions of grate blocks commonly used today can be provided for determining the width. For example, with a standard width of 100 mm, grating blocks with 200 mm, 400 mm or 500 mm can be selected. This allows a row of grate blocks to be built within a combustion chamber with as few individual grate blocks as possible.
  • the head piece is preferably made in one piece over the entire width of the grate block. This enables the number of metal pins required to be reduced to a minimum.
  • the parts of a combustion grate to be replaced should not exceed a maximum weight of 25 kg, otherwise assembly without lifting aids is no longer possible. However, such aids are usually not available in a combustion chamber for revisions. However, since according to the invention only the head piece has to be exchanged as a wearing part, a significantly larger width of an individual grate block can be achieved.
  • Air passage openings are provided in the head piece itself. These serve to introduce the necessary combustion air into the fuel and thus into the combustion chamber.
  • the number and shape of the air passage openings can be adapted to the needs of the combustion. In the case of a revision, head pieces with differently designed air passage openings can also be used very easily.
  • a seal is advantageously provided between the base element and the head piece in the area of the running surface. The seal prevents the combustion air from escaping between the head piece and the base element.
  • the seal can be implemented, for example, by inserting a fiberglass cord into a groove provided for this purpose. The groove can be provided in the base element and/or the head piece.
  • the proposed design also makes it possible to store the wearing parts for the grate block more cheaply, since storage is limited to the head pieces, which are susceptible to wear, and the metal pins required for securing.
  • Ribs can be provided below the passage openings in the base element in such a way that the metal pin cannot fall through the passage opening.
  • a fall-through protection can be attached to the metal pin before it is inserted into the passage openings and the fall-through protection can be removed again during or after the welding process. This allows the metal pin to be mounted easily and an additional holder for the metal pin during the welding process is not necessary.
  • a simple dismantling of a head piece on a grate block which has been assembled according to the above method is made possible.
  • the welding of the metal pin is released with a welding torch and the metal pin is knocked or lifted out of the passage openings.
  • a new head piece can then be inserted.
  • the basic element of the grate block does not need to be lifted or removed.
  • the base does not need to be moved in order to carry out an exchange of the headers. Access to the grate block from multiple sides is not required either to remove the worn headers or to install the new headers. All necessary work can be carried out in the combustion chamber.
  • FIG. 1 shows a schematic representation of combustion grate 1 according to the prior art in a longitudinal section.
  • the so-called combustion chamber 2 is located above the combustion grate 1.
  • material to be burned is placed on the combustion grate 1 (not shown).
  • the combustion grate 1 consists of grate blocks 3, 4 arranged one above the other in the manner of a staircase.
  • the grate blocks have a running surface 10 and an end face 11 as well as a holding element 8 .
  • Each grate block 3.4 is supported on the side facing away from the combustion chamber 2 with the holding element 8 on a holding tube 7 and lies with the end face 11 on the running surface 10 of the downstream grate block 3.4, with the end face 11 being essentially perpendicular to the running surface 10 is arranged.
  • Movable grate blocks 4 alternate with fixed grate blocks 3 in the course of the stair-like structure. As a result, every second grate block 4 is moved back and forth over the running surface 10 of the underlying fixed grate block 3 in the direction of movement indicated by the arrow 5 by moving the corresponding holding tube 7 . This causes the material to be burned lying on the combustion grate 1 to be conveyed through the end face 1 in the conveying direction indicated by the arrow 6 over the combustion grate 1 .
  • the grate blocks 3.4 are additionally provided with attachments 9, which serve to connect the grate blocks 3.4 lying next to one another in a row. The connection can be made with screws, rods or other fasteners.
  • the connection of adjacent grate blocks 3, 4 to a row has the advantage that a whole row of grate blocks 3, 4 can be moved together without the risk that individual grate blocks 3, 4 from the running surface of the underlying grate block 3, 4 take off.
  • the proposed grate block 12 consists of a base element 13 and a head piece 12 (see figure 4 ).
  • figure 2 shows a schematic representation of an embodiment of a basic element 13 and figure 3 a schematic representation of an embodiment of a head piece 17.
  • the base element 13 has a holding element 8, a running surface 10 and one on which the holding element 8 is opposed Arranged end, foot 23 with a sliding surface 24 on.
  • the holding element 8 is divided into two holding elements 8 due to the width of the base element 13.
  • the foot 23 of the base element 13 is shown as extending over the entire width of the base element 13. However, it is conceivable to design the foot 23 only in partial sections, for example at the ends of the base element 13.
  • Fastenings 9 are also provided for connection to a base element 13 arranged in a row. The arrangement of these basic elements makes it possible to replace old grate blocks 3.4 with new grate blocks 12 without changing the basic construction of the combustion grate itself.
  • the base element 13 also has two supports 14 for the head piece 17 to rest on.
  • the supports 14 are each provided with a rectangular passage opening 15 . Are directed towards the headpiece in figure 2 a total of eight projections 16 shown.
  • the number of projections 16 as well as the number of supports 14 can be freely selected.
  • the projections 16 are formed onto the ribs 25, with the ribs 23 being supported on the foot 23.
  • the head piece 17 has an end face 11 with air passage openings 20 inserted therein. Furthermore, passage openings 18 are provided in the head piece 17 which correspond to the passage openings 15 in the supports 14 of the base element 13 . A corresponding recess 19 is provided on the head piece 17 as a counterpart to the projections 16 in the base element 13 .
  • figure 4 shows a schematic representation of a grate block 12 after the basic element 13 has been assembled figure 2 and the head piece 17 after figure 3 .
  • the head piece 17 is inserted into the base element 13 on the side opposite the holding element 8 of the base element 13 .
  • the head piece 17 is made in one piece over the entire width a of the grate block 12 .
  • the width a of the grate block 12 also corresponds to the width of the running surface 10 and the foot 23 of the base element 13.
  • the air passage openings 20 provided in the end face 11 of the head piece 17 are shown as an example.
  • metal pins 21 embedded which pass through the passage openings of the base element 13 and are welded to the head piece 17.
  • FIG figure 5 12 shows a schematic representation of the grate block 12.
  • FIG figure 4 in a longitudinal section.
  • the base element 13 with its running surface 10, the holding means 8 and the foot 23 extends up to a projection 16 directed towards the head piece 17.
  • the projection 16 is formed on a rib 25 which is formed on the foot 23 of the base element 13 forming the sliding surface 23 or is appropriate.
  • the projection 16 of the base element 13 interacts with the recess 19 of the head piece 17 and, when the head piece 17 rests on the support 14 of the base element 13, leads to a positioning of the head piece 17 on the base element 13
  • the metal pin 21 introduced through the opening of the support 14 of the base element 13 is connected to the head piece 17 by the weld 22 . This means that the head piece 17 on the base element 13 can no longer be displaced by external influences.

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

Claims (14)

  1. Bloc de grille (12) pour une grille d'une installation d'incinération
    - comportant un élément de base (13) et
    - une pièce de tête (17) disposée sur l'élément de base (13),
    dans lequel l'élément de base (13) présente un élément de maintien (8) permettant l'appui sur des tubes de maintien (7) et un pied (23) permettant l'appui sur la surface de roulement (10) de l'autre élément de base le plus proche disposé en dessous de l'élément de base (13), dans lequel l'élément de base (13) présente
    - au moins une saillie (16) dirigée en direction de la pièce de tête (17) et
    - au moins un support (14) prévu pour la pose de la pièce de tête (17) et pourvu d'au moins une ouverture de passage (15),
    et dans lequel la pièce de tête (17) présente
    - au moins un évidement (19) dirigé vers l'élément de base (13) et
    - au moins une ouverture de passage (18),
    dans lequel la saillie (16) de l'élément de base (13) et l'évidement (19) de la pièce de tête (17) sont coordonnés l'un avec l'autre de sorte qu'un positionnement de la pièce de tête (17) sur l'élément de base (13) est assuré par leur coopération, et dans lequel l'ouverture de passage (15) dans le support (14) de l'élément de base (13) et l'ouverture de passage (18) de la pièce de tête (17) sont disposées de manière concentrique l'une au-dessus de l'autre,
    et dans lequel une tige métallique (21) destinée à être introduite dans les ouvertures de passage (15, 18) est prévue et la tige métallique (21) est soudée à la pièce de tête (17) pour la fixation de la pièce de tête (17) à l'élément de base (13).
  2. Bloc de grille (12) selon la revendication 1, dans lequel l'élément de base (13) présente deux saillies (16) et deux supports (14) respectivement pourvus d'une ouverture de passage (15) et la pièce de tête (17) présente deux évidements (19) et deux ouvertures de passage (18).
  3. Bloc de grille (12) selon la revendication 1 ou 2, dans lequel les ouvertures de passage (15, 18) sont rectangulaires.
  4. Bloc de grille (12) selon l'une des revendications précédentes, dans lequel la forme de la ou des tiges métalliques (21) correspond aux ouvertures de passage (15, 18).
  5. Bloc de grille (12) selon l'une des revendications précédentes, dans lequel au moins une nervure (25) dirigée à l'opposé de la pièce de tête (17) est prévue en dessous de l'ouverture de passage (15) dans l'élément de base (13).
  6. Bloc de grille (12) selon l'une des revendications précédentes, dans lequel la tige métallique (21) ou les ouvertures de passage (15, 18) sont conçues de telle sorte que la tige métallique (21) est maintenue dans les ouvertures de passage (15, 18) lors de son introduction dans les ouvertures de passage (15, 18).
  7. Bloc de grille (12) selon l'une des revendications précédentes, dans lequel la tige métallique (21) est pourvue d'une protection anti-perforation.
  8. Bloc de grille (12) selon l'une des revendications précédentes, dans lequel l'ouverture de passage (18) de la pièce de tête (17) présente un élargissement sur le côté opposé à l'élément de base (13).
  9. Bloc de grille (12) selon l'une des revendications précédentes, dans lequel l'élément de base (13) présente une surface de roulement (10) et celle-ci est pourvue d'un placage par soudage.
  10. Bloc de grille (12) selon l'une des revendications précédentes, dans lequel le bloc de grille (12) présente une largeur (a) de 150 mm à 600 mm et est réalisé d'un seul tenant sur toute la largeur (a).
  11. Bloc de grille (12) selon l'une des revendications précédentes, dans lequel des ouvertures de passage d'air (20) sont prévues dans la pièce de tête (17).
  12. Bloc de grille (12) selon l'une des revendications précédentes, dans lequel un joint est prévu entre l'élément de base (13) et la pièce de tête (17) dans la zone de la surface de roulement (10).
  13. Procédé permettant l'assemblage d'un bloc de grille (12), lequel présente un élément de base (13) et une pièce de tête (17), dans lequel l'élément de base (13) présente un élément de maintien (8) pour l'appui sur des tubes de maintien (7) et un pied (23) pour l'appui sur la surface de roulement (10) de l'autre élément de base le plus proche disposé en dessous de l'élément de base (13), et au moins une saillie (16) dirigée en direction de la pièce de tête (17) et au moins un support (14) prévu pour la pose de la pièce de tête (17) et pourvu d'au moins une ouverture de passage (15), la pièce de tête (17) présentant au moins un évidement (19) dirigé vers l'élément de base (13) et au moins une ouverture de passage (18), la saillie (16) de l'élément de base (13) et l'évidement (19) de la pièce de tête (17) étant coordonnés l'un avec l'autre de sorte que la pièce de tête (17) est positionnée sur l'élément de base (13) par leur coopération et l'ouverture de passage (15) dans le support (14) de l'élément de base (13) et l'ouverture de passage (18) de la pièce de tête (17) étant disposées de manière concentrique l'une au-dessus de l'autre, comportant les étapes de procédé suivantes:
    - assemblage de l'élément de base (13) et de la pièce de tête (17),
    - introduction d'une tige métallique (21) dans les ouvertures de passage (15, 18),
    - soudage de la tige métallique (21) avec la pièce de tête (17).
  14. Procédé permettant le démontage d'une pièce de tête (17) sur un bloc de grille (12) assemblé selon un procédé selon la revendication 13, dans lequel le soudage de la tige métallique (21) est dissous à l'aide d'un chalumeau de soudage et la tige métallique (21) est arrachée ou soulevée hors des ouvertures de passage (15, 18).
EP18020007.3A 2017-01-12 2018-01-08 Bloc de grillage Active EP3348903B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00041/17A CH713352A1 (de) 2017-01-12 2017-01-12 Rostblock für einen Rost einer Verbrennungsanlage.

Publications (2)

Publication Number Publication Date
EP3348903A1 EP3348903A1 (fr) 2018-07-18
EP3348903B1 true EP3348903B1 (fr) 2023-03-15

Family

ID=60942890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18020007.3A Active EP3348903B1 (fr) 2017-01-12 2018-01-08 Bloc de grillage

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EP (1) EP3348903B1 (fr)
CH (1) CH713352A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2555108A (en) * 1947-04-30 1951-05-29 American Eng Co Ltd Progressive feed stoker

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013822B (de) * 1953-08-12 1957-08-14 Keller G M B H Rostplatte fuer Gegenschubrost
CH663266A5 (de) * 1984-07-05 1987-11-30 Kuepat Ag Roststab fuer verbrennungsoefen.
CN2511880Y (zh) * 2001-12-17 2002-09-18 北京桑普阳光技术有限公司 简便拆装式炉箅
EP1996863A1 (fr) * 2006-03-17 2008-12-03 Doikos Investments, Ltd. Grille refroidie par liquide comprenant des plaques d'usure
CH703063A1 (de) * 2010-04-21 2011-10-31 Marco Bachmann Verkleidungselement für Vorrichtungsteile von Verbrennungsöfen.
GB2483479A (en) * 2010-09-09 2012-03-14 Tiska Gmbh Furnace grate bars
KR101326481B1 (ko) * 2013-09-02 2013-11-08 주식회사 대경에스코 하향통풍식 화염건류소각로
CN106196090A (zh) * 2015-05-05 2016-12-07 荏原环境工程株式会社 炉床构成部件、炉排以及炉床构成部件的制造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2555108A (en) * 1947-04-30 1951-05-29 American Eng Co Ltd Progressive feed stoker

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Publication number Publication date
EP3348903A1 (fr) 2018-07-18
CH713352A1 (de) 2018-07-13

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