EP0989364B1 - Elément de grille et procédé de refroidissement de ce dernier - Google Patents

Elément de grille et procédé de refroidissement de ce dernier Download PDF

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Publication number
EP0989364B1
EP0989364B1 EP19980810961 EP98810961A EP0989364B1 EP 0989364 B1 EP0989364 B1 EP 0989364B1 EP 19980810961 EP19980810961 EP 19980810961 EP 98810961 A EP98810961 A EP 98810961A EP 0989364 B1 EP0989364 B1 EP 0989364B1
Authority
EP
European Patent Office
Prior art keywords
grate
block
longitudinal direction
blocks
stationary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19980810961
Other languages
German (de)
English (en)
Other versions
EP0989364A1 (fr
Inventor
Werner Brennwald
Ernst Hugentobler
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.)
Hitachi Zosen Innova AG
Original Assignee
Von Roll Umwelttechnik 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
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Application filed by Von Roll Umwelttechnik AG filed Critical Von Roll Umwelttechnik AG
Priority to DE59800138T priority Critical patent/DE59800138D1/de
Priority to EP19980810961 priority patent/EP0989364B1/fr
Priority to JP11268742A priority patent/JP2000121013A/ja
Publication of EP0989364A1 publication Critical patent/EP0989364A1/fr
Application granted granted Critical
Publication of EP0989364B1 publication Critical patent/EP0989364B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H3/00—Grates with hollow bars
    • F23H3/02—Grates with hollow bars internally cooled
    • 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
    • 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
    • F23H2900/00—Special features of combustion grates
    • F23H2900/03021—Liquid cooled grates

Definitions

  • the invention relates to a grate element for a system for thermal treatment of waste according to the generic term of claim 1.
  • the invention further relates to a Method for cooling a grate element according to the Preamble of claim 6.
  • a grate element a waste incineration plant known with which the Waste conveyed through a combustion chamber and thereby is dried and burned.
  • the grate element points several grate blocks arranged one behind the other in steps on, alternating between fixed and movable Grate blocks are arranged in succession. That on waste material located in the grate element, for example Garbage is made by a pushing movement of the moving Grate blocks pushed forward, mixed, dried and burned. To reduce the high thermal Each grate block is cooled with water.
  • the present invention is based on the object to form economically more advantageous grate element.
  • the task is further solved with a method for Cooling a grate element having the features of Claim 6.
  • the sub-claims 7 and 8 relate to further advantageous process steps.
  • a grate element comprising a plurality of in a longitudinal direction successively arranged grate blocks, which either as fixed grate blocks or in the longitudinal direction movable grate blocks are designed, each Rust block has a foot, which on the in The longitudinal direction of the subsequent grate block rests, whereby only the fixed grate blocks for cooling with a fluid are designed.
  • the fixed grate blocks have a cooled foot that has a contact surface trains which on the underlying, in Longitudinally movable grate block rests. This Contact area covers part of the surface of the movable grate block and thereby causes cooling the surface of the movable grate block.
  • the movable grate block also has a foot, which is on the surface of a chilled, fixed Rust block rests and back and forth in the longitudinal direction is moved and thereby cooled.
  • a fluid for cooling especially a liquid such as water.
  • the advantages achieved by the invention are to see in particular in the effective cooling, whereby Thermal stresses and thermal expansions in the grate block largely be eliminated. Because only the fixed So far, rust blocks are cooled required, movable fluid lines, which were necessary around the movable grate block in particular to supply water. Operation of the Rust elements according to the invention are therefore less prone to failure and less expensive. In addition, the Assembly and changing of the movable grate blocks simplified. The movable grate blocks also need no fluid conductive interiors and are therefore less expensive to produce.
  • FIG. 1 shows a grate element 3 as part of a grate for a plant for the thermal treatment of waste such as waste shown.
  • a rust track sits like a broken line indicated, in length from several grate elements 3 together. As a rule, three to six rust elements 3 arranged in a row.
  • several Grate tracks are placed side by side; usually one to four grate tracks form the width of the grate. The Number of grate elements 3 and the grate tracks depends on the predetermined throughput of the waste and of its Calorific value.
  • Each grate element 3 has in the illustrated Execution example eight in the longitudinal direction L in a row arranged grate blocks 4.5, each one fixed grate block 4 a movable grate block 5 follows. All grate blocks 4, 5 are at one end by one Block holder tube 7 pivotally mounted. The block holder tube 7 the fixed grate blocks 4 is on a stationary Console 8 attached, while the block holder tube 7 of movable grate blocks 5 on a in the longitudinal direction L linear movable console 9 is attached. All movable consoles 9 are on a in the longitudinal direction L back and forth movable grate carriage 10 attached, which via rollers 12 on a carrier 13 of the grate element 3 is stored.
  • This movement in the longitudinal direction L causes essentially a movement of the movable grate blocks 5 in Direction of movement L1, with all grate blocks also one slight pivoting movement around the respective block holding tube 7 To run.
  • In the direction perpendicular to the display plane can have a plurality of rust blocks 4.5 next to each other be arranged, which are mutually connected via a pull rod 14 are tense.
  • the formed by the grate blocks 4.5 The conveyor line is laterally through a side termination 15 limited.
  • FIG. 2 shows a bottom view from the P direction Embodiment of a cooled, fixed Grate blocks 4.
  • Fig. 3 shows the same grate block 4 as Cross section along the line A-A.
  • the grate block 4 has a block body 20 of a U-shaped Cross-section, the top wall of which is 23 is designated.
  • the outer surface of the upper wall 23 forms a usable area 33 on which the waste to be treated comes to rest and along which it transports becomes.
  • a rear wall 21 of the block body 20 is included provided a hook 22 for hanging on the block holder tube 7. Between the top wall 23 and a front wall 24 there is a corner 25.
  • the grate block 4 with an inclined floor 28 and a foot 26 with a Support surface 26a provided.
  • Water supply line 30 with the water supply direction is indicated by an arrow W1.
  • Parallel to the back wall 21 extends to the water supply line 30 connected water supply cross line 31, which on individual points is provided with outlet openings 32.
  • From the water supply cross line 31 branch three along arranged water supply branch lines 34 from the extend to the front wall 24 and there are so angled that their outlet opening 35 is immediately in front of the foot 26. That from the Outlet opening 35 fills water together with the water emerging from the outlet openings 32 closed cold room 27, both of these Counteract water currents in a certain sense and for a good water mixing or for a reinforced one Provide cooling effect. It is important that the particularly mechanically stressed point of the Rust blocks 4, namely the foot 26, directly with the Cooling water is applied.
  • the highest temperatures and therefore the highest thermal stress is the front corner 25 exposed.
  • Inlet openings 41 from two water discharge branch lines 40 attached. Entry from heated water in the water discharge branch pipes 40 is indicated by an arrow W4.
  • the water drainage branch lines 40 extend obliquely along of the bottom 28 and open into a parallel to the Water supply cross line 31 arranged opposite this lower water drainage cross line 42. From there the heated water is discharged by means of a discharge line 43 in Directed by an arrow W5 out of the cooling space 27.
  • the water supply line 30 and the water discharge line 43 are on in a manner not shown Cold water low pressure system connected. A connection to a closed cooling water system with a built-in heat exchanger is preferred.
  • FIG. 4 shows a perspective view from below another embodiment of a coolable, stationary grate blocks 4.
  • Fig. 5 shows the same Grate block 4 as a cross section along the line B-B.
  • the block body 20 comprises a front wall 24 with a foot 26 and support surface 26a, a rear wall 21, two Side walls 29, two hooks 22 and an upper wall 23 with Usable area 33.
  • a tube 16 poured which to a water supply line 30 and can be connected to a water discharge line 43.
  • the course of the Tube 16 chosen such that good cooling of the top wall 23 results, as well as a good cooling in Area of the foot 26 in which the tube 16, as in FIG. 5 shown, perpendicular to the plane of representation and thus parallel to the direction of the foot 26 within the Foot 26 runs. With this arrangement, the foot 26 a large amount of heat is removed.
  • the movable grate block 5 has no fluid control system, i.e. no cold room 27 as well no lines 31, 40, 42 according to that in FIGS. 2 and 3 illustrated embodiment, or no tube 16th according to that shown in Figs. 4 and 5 Execution example.
  • Such a grate block without Fluid control system is very inexpensive to manufacture.
  • the length L3 of the foot 26 in the longitudinal direction L is in an advantageous embodiment of both fixed grate block 4 as well as the movable Grate block 5 at least 1 cm.
  • the length L3 can also be longer be and up to half the length L4 of the grate block 4.5 be.
  • the support surface 26a can include one smooth surface also a textured surface have such that the greatest possible amount of heat from the movable grate block 5 to the fluid-cooled fixed grate block 4 is transferable.
  • Fig. 4 shows a perspective bottom view of the Grate block 4, which is symmetrical to one in FIG. 6 indicated, in the longitudinal direction L and perpendicular to Surface 33 extending symmetry plane S. is. 6 shows the course of the in the grate block 1 according to Fig. 4 cast pipe 16.
  • the water is over the Stub 30 fed, and then flows over the Sub-sections 16a, 16b, 16i, 16d, 16k, 16h for in Longitudinal direction L and extending along the side wall 29 Section 16e, and then over the section 16f to the perpendicular to the longitudinal direction L. Section 16g, and then over the symmetrical designed course of the tube 16 back to the nozzle 43.
  • the grate block is preferably cooled such that on the one hand, it is as warm as possible to keep it warm on the To remove little heat from surface 33 on the other hand, however, is so cool that it is made of cast iron existing rust block no excessive wear from the experiences high temperature.

Landscapes

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

Claims (9)

  1. Élément de grille (3) pour une installation de traitement thermique de déchets, comprenant une pluralité de blocs de grille (4, 5) agencés les uns derrière les autres dans une direction longitudinale (L), lesdits blocs étant réalisés sous forme de blocs (4) fixes et de blocs (5) mobiles en direction longitudinale (L), et chaque bloc (4, 5) comportant un pied (26) qui repose sur le bloc (4, 5) suivant dans la direction longitudinale (L), caractérisé en ce que seuls les blocs fixes (4) sont conçus en vue de leur refroidissement avec un fluide.
  2. Élément de grille (3) selon la revendication 1, caractérisé en ce que chaque bloc fixe (4) est relié à une conduite d'amenée de liquide (30) ainsi qu'à une conduite d'évacuation de liquide (43).
  3. Élément de grille (3) selon l'une des revendications précédentes, caractérisé en ce que, en direction longitudinale (L) sont disposés en alternance un bloc fixe (4) et un bloc mobile (5).
  4. Élément de grille (3) selon l'une des revendications précédentes, caractérisé en ce que le pied (26) des blocs fixes (4) comporte une surface d'appui (26a) dont la longueur en direction longitudinale (L) s'élève à au moins 1 cm, et au maximum à la moitié de la longueur totale (L4) du bloc fixe (4).
  5. Élément de grille (3) selon l'une des revendications précédentes, caractérisé en ce que le liquide destiné au refroidissement, en particulier de l'eau, est mené de telle façon à l'intérieur du bloc fixe (4) qu'une proportion essentielle de la quantité de chaleur totale à évacuer est susceptible d'être évacuée à partir du pied (26).
  6. Procédé de refroidissement d'un élément de grille (3) dans une installation pour le traitement thermique de déchets, dans lequel l'élément de grille (3) comporte une pluralité de blocs de grille (4, 5) agencés les uns derrière les autres dans une direction longitudinale (L), lesdits blocs étant réalisés sous forme de blocs fixes (4) et de blocs (5) mobiles en direction longitudinale (L), chacun des blocs (4, 5) comportant un pied (26) qui repose sur le bloc (4, 5) suivant dans la direction longitudinale (L), caractérisé en ce que seuls les blocs fixes (4) sont refroidis par un fluide en circulation, en ce que les blocs mobiles (5) sont déplacés en va-et-vient en direction longitudinale (L), et en ce que les blocs mobiles (5) sont refroidis par l'intermédiaire des contacts avec les blocs fixes (4).
  7. Procédé selon la revendication 6, caractérisé en ce que le bloc mobile (5) est déplacé en va-et-vient en direction longitudinale (L), de telle manière que la moitié au moins de la longueur (L4) du bloc mobile (5) est balayée par le pied (26) du bloc fixe (4).
  8. Procédé selon l'une ou l'autre des revendications 6 et 7, caractérisé en ce que, vu en direction longitudinale (L), chaque bloc sur deux (4, 5) est déplacé en va-et-vient en direction longitudinale (L).
  9. Installation d'incinération de déchets, comprenant un élément de grille (3) selon l'une des revendications 1 à 5, ou fonctionnant selon l'un des procédés selon l'une des revendications 6 à 8.
EP19980810961 1998-09-24 1998-09-24 Elément de grille et procédé de refroidissement de ce dernier Expired - Lifetime EP0989364B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59800138T DE59800138D1 (de) 1998-09-24 1998-09-24 Rostelement und Verfahren zum Kühlen desselben
EP19980810961 EP0989364B1 (fr) 1998-09-24 1998-09-24 Elément de grille et procédé de refroidissement de ce dernier
JP11268742A JP2000121013A (ja) 1998-09-24 1999-09-22 焙焼部品およびその冷却方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19980810961 EP0989364B1 (fr) 1998-09-24 1998-09-24 Elément de grille et procédé de refroidissement de ce dernier

Publications (2)

Publication Number Publication Date
EP0989364A1 EP0989364A1 (fr) 2000-03-29
EP0989364B1 true EP0989364B1 (fr) 2000-04-26

Family

ID=8236347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980810961 Expired - Lifetime EP0989364B1 (fr) 1998-09-24 1998-09-24 Elément de grille et procédé de refroidissement de ce dernier

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EP (1) EP0989364B1 (fr)
JP (1) JP2000121013A (fr)
DE (1) DE59800138D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1983261A1 (fr) 2007-04-20 2008-10-22 Ernst Schenkel Compensateur de mouvement

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3961790B2 (ja) * 2001-06-25 2007-08-22 株式会社タクマ 水冷式火格子
FR2868515B1 (fr) * 2004-04-01 2015-04-24 Vinci Environnement Module de grille pour four d'incineration des ordures menageres
DE202005011215U1 (de) 2005-07-16 2005-09-29 Lls Standardkessel Service Gmbh Vorschubrost für Feuerungsanlagen
EP1975507A1 (fr) * 2007-03-29 2008-10-01 ThyssenKrupp Xervon Energy GmbH Grille d'avance pour foyers de combustion
JP3138454U (ja) * 2007-09-15 2008-01-10 株式会社川崎技研 ゴミ焼却炉の火格子の構造
SE1951417A1 (en) * 2019-12-09 2021-06-10 Flamma Systems Sverige Ab An incinerator with a firing grate and a method of operating such an incinerator
EP3967927A1 (fr) * 2020-09-09 2022-03-16 Hitachi Zosen Inova AG Bloc de grille refroidi par eau pour une installation d'incinération

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1975601A (en) * 1929-08-10 1934-10-02 Graafen Ferdinand Furnace grate
FR2508140A1 (fr) * 1981-06-19 1982-12-24 Guyard Jacques Installation de chauffage a combustible solide par exemple pulverulent, comportant un dispositif de fond de foyer ajoure
CH688840A5 (de) 1994-11-17 1998-04-15 Von Roll Umwelttechnik Ag Kühlbarer Rostblock.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1983261A1 (fr) 2007-04-20 2008-10-22 Ernst Schenkel Compensateur de mouvement

Also Published As

Publication number Publication date
EP0989364A1 (fr) 2000-03-29
JP2000121013A (ja) 2000-04-28
DE59800138D1 (de) 2000-06-08

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