EP3348903A1 - Bloc de grillage - Google Patents

Bloc de grillage Download PDF

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Publication number
EP3348903A1
EP3348903A1 EP18020007.3A EP18020007A EP3348903A1 EP 3348903 A1 EP3348903 A1 EP 3348903A1 EP 18020007 A EP18020007 A EP 18020007A EP 3348903 A1 EP3348903 A1 EP 3348903A1
Authority
EP
European Patent Office
Prior art keywords
head piece
base element
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.)
Granted
Application number
EP18020007.3A
Other languages
German (de)
English (en)
Other versions
EP3348903B1 (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
Original Assignee
ICE AG
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 ICE AG filed Critical ICE AG
Publication of EP3348903A1 publication Critical patent/EP3348903A1/fr
Application granted granted Critical
Publication of EP3348903B1 publication Critical patent/EP3348903B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F23H11/00—Travelling-grates
    • F23H11/18—Details
    • F23H11/28—Replaceable burning-surface
    • 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 a combustion plant, in particular a waste incineration plant, and to a method for assembly and disassembly of a grate block.
  • Such grate blocks are used in incinerators, which have grates for conveying fuel through a combustion chamber.
  • the grates are exposed to high thermal and mechanical stress due to the kiln.
  • the grates are usually formed by roof tiles superposed, arranged transversely to the transport direction of the kiln, rows of grate blocks.
  • the grate blocks of a row are supported on the one hand with a molded foot on a running surface of the grate blocks of the row below and on the other hand on support tubes mounted under the grate blocks.
  • the EP 0 170 803 A1 discloses a grate block having an exchangeable head piece attached to a support member. It is proposed to provide a releasable attachment of the components on the side facing away from the kiln of the grate block.
  • a disadvantage of this design is that in order for the replacement of the head piece accessibility of the grate block must be given from both sides 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.
  • the attachment takes place positively, the two components are formed in their shape such that no further attachment is necessary.
  • a disadvantage of this design is that a lateral insertion of a head piece on the base plate is possible only in the expanded or at least raised state of the grate block
  • the invention is based on the object to propose 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 wear parts of the grate block in the installed state of the grate block.
  • This object is achieved by proposing a grate block having a base element and a top piece arranged on an upper side of the base element according to claim 1.
  • a grate block is provided with a base element and a head piece arranged on the base element, wherein the base element has at least one projection directed in the direction of the head piece and at least one provided for abutment of the head piece and provided with at least one passage opening.
  • the head piece has at least one return directed towards the base element and at least one passage opening, wherein the projection of the base element and the return of the head piece are matched to one another, so that a positioning of the head piece on the base element is given by their interaction, and wherein the passage opening in the support of Base 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 member, the metal pin is welded to the head piece.
  • the base element has a holding element for supporting on the holding tubes and a foot for supporting on the running surface of the nearest, arranged below the base element further basic element.
  • the protrusion attached to the base element cooperates with the return present on the head piece in such a way that the head piece assumes an intended position on the base element.
  • the projection may be formed as a head piece opposing rib or protuberance of a rib. This projection engages in the provided on the headpiece return.
  • the recess may be formed as a simple depression or as a rib. Existence and return as correspondingly shaped ribs, results in a positioning of the head piece only in the direction in which engage the ribs. In cooperation with the requirements of the basic element on which rests the head piece, it is advantageous if the positioning of the head piece relative to the base element in the vertical direction takes place against the running surface of the grate block.
  • the base member is provided with such a shaped protuberance against the head piece, which engages this in a corresponding recess of the head piece and thereby positioning of the head piece can be done in several directions.
  • the head piece can be additionally supported on a foot arranged transversely to the conveying direction of the burning stock in the base element.
  • the shape of the metal pin is the shape of the openings accordingly.
  • the geometric shape may be, for example, circular or polygonal. After insertion of the metal pin this is welded to the head and thus held immovably in the passages. As a result, a shift or even a falling apart of the two components of the grate block is no longer possible.
  • An advantage of this type of attachment is that assembly or replacement of the header is possible from a side facing the kiln. An exchange of the headers can therefore take place in the combustion chamber. There is no need to separate the grate blocks connected together in a row. It is thus no longer necessary to move or remove a basic element once installed in the grate.
  • a projection or recess are arranged at both ends of the base member and the head piece.
  • a centrally provided support on the base element results for the head piece a plant on the base element in three points.
  • the basic element has two projections and two supports, each provided with a passage opening, and the headpiece has two recesses and likewise two passage openings.
  • the two projection - return - compounds, as well as the requirements of the primitive can be provided arbitrarily on the base element and head piece. It has been shown that a maximum possible width of the grate block due to the weight of the head piece can be used by the use of two metal pins to secure the head piece.
  • the passage openings are rectangular.
  • the arrangement of the rectangle is adjusted to the mechanical stress of the head piece. Since the movement of the grate block in the conveying direction of the combustion material over the underlying grate block a higher load than in the transverse direction, the longitudinal side of the rectangle is directed against the conveying direction of the combustible.
  • At least one head piece opposite the rib below the passage opening in the base element is provided.
  • the rib may be identical to a rib forming the projection on the base element.
  • a plurality of such a rib forming a projection is provided, wherein at least one arranged below the passage opening rib serves in its formation as a stop for the inserted into the passage metal pin. This prevents the metal pin from falling through the passage opening. After insertion of the metal pin in the passage openings this is held by the rib in the passage openings.
  • the metal pin or the passage opening are shaped such that the metal pin is held in its passage into the passage opening in the passage.
  • the Anformung is designed so that the metal pin can be knocked out at its later removal despite the Anformung through the passage opening.
  • a corresponding burr can be formed on the metal pin or the passage opening can be provided with a corresponding cross-sectional constriction, which are also released by releasing the weld.
  • the metal pin may be provided with a diarrheal protection.
  • a diarrheal protection the metal pin can be provided, for example, prior to installation with a welding point, which is involved in the assembly of the metal pin in the weld.
  • a wire or other tool projecting beyond the cross section of the metal pin may be welded or otherwise secured to the metal pin. The metal pin can thereby be inserted into the passage openings without the metal pin must be held by the opposite side in position. After assembly respectively welding of the metal pin with the head piece of this tool is removed again.
  • the metal pin are in its dimensions be adapted to the dimensions of the passage openings that the metal pins 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 passage opening in the support of the base element or the passage opening in the head piece.
  • the metal pin can thereby be inserted into the passage opening without this having to be held by the opposite side.
  • the clamping of the metal pin takes place in the passage opening of the head piece. This can be used in a new head piece a similar metal pin. This would be difficult with a clamping in the passage opening of the support of the base element, since the excess of the metal pin would have to be gradually increased by repeated use of the basic element.
  • the passage opening of the head piece has an extension 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 welding of the head piece with the metal pin has to be done in such a way that the passage opening is closed in the head piece and forms a plane with the surface of the head piece.
  • the tread of the base member is provided with a weld cladding. As a result, the service life of the basic element can be substantially increased.
  • the grate block has a width of 150 mm to 600 mm.
  • the number of grate blocks in a row, which are necessary for an assembly of the grate can be substantially reduced.
  • the dimensions of grate blocks commonly used today can be provided corresponding multiples for the determination of the width. For example, with a standard wheel width of 100 mm, grate blocks of 200 mm, 400 mm or 500 mm can be selected. This allows a number of grate blocks to be built within a combustion chamber with as few individual grate blocks as possible.
  • the head piece over the entire width of the grate block is made in one piece. This allows the number of necessary metal pins 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 mounting without lifting equipment is no longer possible. Usually, however, such tools are not available in a combustion chamber at revisions.
  • the head piece is to be replaced as a wear part, a much larger width of a single grate block can be achieved.
  • air passage openings are provided. These serve to introduce necessary combustion air into the kiln and thus into the combustion chamber.
  • the number and shape of the air passage openings can be adapted to the needs of combustion. Also can be used in a revision very simple head pieces with differently applied air passage openings.
  • a seal is provided in the region of the running surface between the base element and the head piece.
  • the seal prevents combustion air from escaping between the header and the base.
  • the seal can be performed for example by inserting a fiberglass cord in a groove provided for this purpose.
  • the groove can be provided in the base element and / or the head piece.
  • ribs are provided below the passage openings in the base element in such a way that the metal pin can not fall through the passage opening.
  • diarrheal protection may be applied to the metal pin prior to insertion into the passageways, and diarrheal protection may be removed during or after the welding operation. As a result, a simple mounting of the metal pin is possible and an additional support for the metal pin during the welding process is not necessary.
  • a simple method for disassembling a header on a grate block is made possible, which has been assembled according to the above method.
  • the welding of the metal pin is released with a welding torch and the metal pin is knocked out of the openings or lifted out. Subsequently, a new head piece can be used.
  • the basic element of the grate block is neither to raise nor to expand.
  • the base element need not be moved to carry out an exchange of the head pieces. It is not necessary to access the grate block from several sides, neither to remove the worn head pieces nor to mount the new head pieces. 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.
  • combustion chamber 2 Above the combustion grate 1 there is the so-called combustion chamber 2.
  • firing material is applied to the combustion grate 1 (not shown).
  • the combustion grate 1 is composed of staircase stacked grate blocks 3, 4 together.
  • the grate blocks have a running surface 10 and an end face 11 and 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, wherein the end face 11 is substantially perpendicular to the running surface 10 is arranged.
  • movable grate blocks 4 alternate with fixed grate blocks 3.
  • every other grate block 4 is reciprocated over the running surface 10 of the underlying fixed grate block 3 in the direction of movement indicated by the arrow 5.
  • the grate blocks 3,4 are additionally provided with fasteners 9, which serve to connect the juxtaposed in a row grate blocks 3,4 together. The connection can be done with screws, rods or other fasteners.
  • connection of juxtaposed grate blocks 3, 4, to a row has the advantage that in each case 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 now proposed grate block 12 consists of a base member 13 and a head piece 12 (see FIG. 4 ).
  • FIG. 2 shows a schematic representation of an embodiment of a base member 13
  • FIG. 3 a schematic representation of an embodiment of a head piece 17.
  • the base member 13 has a holding element 8, a running surface 10 and a, on which the holding element 8 opposed End arranged foot 23 with a sliding surface 24.
  • the holding element 8 is divided in the shown shape of the base member 13 on two holding elements 8 due to the width of the base member 13.
  • the foot 23 of the base member 13 is shown as leading over the entire width of the base member 13. However, it is conceivable to carry out the foot 23 only in partial sections, for example at the ends of the base element 13.
  • fastenings 9 are provided for connection to a basic element 13 arranged in series. The arrangement of these basic elements, an exchange of old grate blocks 3,4 by new grate blocks 12 without changes to a basic construction of the combustion grate itself possible.
  • the supports 14 are each provided with a rectangular passage opening 15. Are directed towards the head in FIG. 2 a total of eight projections 16 are shown.
  • the number of projections 16 as well as the number of pads 14 are arbitrary.
  • the projections 16 are formed on the ribs 25, wherein the ribs 23 are supported on the foot 23.
  • the head piece 17 has an end face 11 with air passage openings 20 inserted therein. Further, 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. As a counterpart to the projections 16 in the base member 13, a corresponding recess 19 is provided on the head piece 17.
  • FIG. 4 shows a schematic representation of a grate block 12 after joining the base member 13 after FIG. 2 and the head piece 17 after FIG. 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 provided in the end face 11 of the head piece 17 air passage openings 20 are shown as an example.
  • metal pins 21 which pass through the passage openings of the base member 13 and are welded to the head piece 17.
  • FIG. 5 shows a schematic representation of the grate block 12 after FIG. 4 in a longitudinal section.
  • the base member 13 with its running surface 10, the holding means 8 and the foot 23 extends to a directed against the head piece 17 projection 16.
  • the projection 16 is formed on a rib 25 which formed on the sliding surface 23 forming foot 23 of the base member 13 or appropriate.
  • the projection 16 of the base member 13 cooperates with the recess 19 of the head piece 17 and leads with the system of the head piece 17 on the support 14 of the base member 13 to a positioning of the head piece 17 on the base element 13.
  • the in the passage opening of the head piece 17 and in the Passage opening of the support 14 of the base member 13 introduced metal pin 21 is connected by the weld 22 with the head piece 17. As a result, a displacement of the head piece 17 on the base member 13 by external influences is no longer possible.

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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)
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 true EP3348903A1 (fr) 2018-07-18
EP3348903B1 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

Country Status (2)

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

Citations (4)

* 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
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
WO2007107024A1 (fr) * 2006-03-17 2007-09-27 Doikos Investments Ltd. Grille refroidie par liquide comprenant des plaques d'usure
KR101326481B1 (ko) * 2013-09-02 2013-11-08 주식회사 대경에스코 하향통풍식 화염건류소각로

Family Cites Families (5)

* 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
CH663266A5 (de) * 1984-07-05 1987-11-30 Kuepat Ag Roststab fuer verbrennungsoefen.
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
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 (4)

* 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
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
WO2007107024A1 (fr) * 2006-03-17 2007-09-27 Doikos Investments Ltd. Grille refroidie par liquide comprenant des plaques d'usure
KR101326481B1 (ko) * 2013-09-02 2013-11-08 주식회사 대경에스코 하향통풍식 화염건류소각로

Also Published As

Publication number Publication date
CH713352A1 (de) 2018-07-13
EP3348903B1 (fr) 2023-03-15

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