EP0625675B1 - Grille à rouleaux pour installations de combustion - Google Patents

Grille à rouleaux pour installations de combustion Download PDF

Info

Publication number
EP0625675B1
EP0625675B1 EP94105221A EP94105221A EP0625675B1 EP 0625675 B1 EP0625675 B1 EP 0625675B1 EP 94105221 A EP94105221 A EP 94105221A EP 94105221 A EP94105221 A EP 94105221A EP 0625675 B1 EP0625675 B1 EP 0625675B1
Authority
EP
European Patent Office
Prior art keywords
grate
roller
rollers
sealing element
fastened
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
EP94105221A
Other languages
German (de)
English (en)
Other versions
EP0625675A3 (fr
EP0625675A2 (fr
Inventor
Dieter Goldammer
Peter Hasselmann
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.)
Deutsche Babcock Werke Energie und Umwelttechnik AG
Original Assignee
Deutsche Babcock Werke Energie und 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
Application filed by Deutsche Babcock Werke Energie und Umwelttechnik AG filed Critical Deutsche Babcock Werke Energie und Umwelttechnik AG
Publication of EP0625675A2 publication Critical patent/EP0625675A2/fr
Publication of EP0625675A3 publication Critical patent/EP0625675A3/fr
Application granted granted Critical
Publication of EP0625675B1 publication Critical patent/EP0625675B1/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
    • F23H17/00—Details of grates
    • F23H17/08—Bearers; Frames; Spacers; Supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H9/00—Revolving-grates; Rocking or shaking grates
    • F23H9/02—Revolving cylindrical grates

Definitions

  • the invention relates to a roller grate for incineration plants, in particular waste incineration plants with the features of the preamble of claim 1.
  • the grate rollers of such roller grates have a roll shell formed from grate bars.
  • the primary combustion air is allocated separately for each grate roller via air supply channels in the ash funnels, which are arranged below the roller grate.
  • the combustion air flows through the slots between the grate bars from below through the roller body and also leaves the top through slots between the grate bars.
  • the invention is based on the object of designing the generic roller grate in such a way that leakage of combustion air and grate diarrhea are minimized.
  • the swivel-mounted sealing elements are pressed against the grate rollers by the springs with a variable contact pressure.
  • a pad of rust diarrhea is formed in the lock-like space between the upper scraper and the sealing element. This increases the sealing effect on the air side and prevents further rusting. If larger parts pass from the fuel bed to the upper scraper, then in an advantageous embodiment of the invention, individual plates of the sealing elements can dodge independently of one another. In such a case, the sealing effect is only interrupted locally and not briefly across the entire grate width.
  • the sealing elements which lie tightly against the grate rollers over the entire length, and the grate diarrhea accumulating in the sluice-like space force the combustion air to flow between the grate bars of the grate rollers and thus prevent leakage currents on the outside of the grate rollers.
  • the prevention of leakage air flows in this way and the associated increased air flow through the grate rollers bring as an advantage an improved fire control and controllability of the combustion process, a lower-pollutant combustion, an improved cooling effect and longer service life for the grate coating as well as a minimization of the amount of grate diarrhea and unburned material with reduced rust diarrhea.
  • a roller grate for an incineration plant in particular a waste incineration plant, consists of a plurality of grate rolls 1, of which only two are shown in FIG. 1.
  • Each grate roller 1 is rotated via a drive (not shown), the directions of rotation 2 of adjacent grate rollers 1 being aligned.
  • the grate rollers 1 are arranged along an inclined plane 3, parallel to one another and at a distance from one another.
  • the storage space 4 is closed at the bottom by rigid wipers 5, which are attached to a wiper support 6 arranged below the grate rollers 1.
  • the wipers 5 are each opposite a grate roller 1 to form a wiping gap 7 (FIG. 2) at a short distance.
  • the wipers 5 have the task of removing buildup that can form on the grate rollers 1.
  • the grate rollers 1 are, as is known, hollow bodies, the outer circumference of which is formed by grate bar supports which receive the grate bars. Steering plates are arranged in the grate rollers 1, with the aid of which grate diarrhea is laterally discharged from the inside of the grate roller 1.
  • Each grate roller 1 is assigned an air supply duct 8 and an ash funnel 9.
  • the combustion air takes its way from the air supply duct 8 through the ash funnel 9 according to the arrows 10 and enters the interior of the hollow grate roller 1 through the slots between the grate bars and exits the grate roller 1 again on the upper side.
  • To leakage flows laterally past the grate rollers 1 The sealing described below serves to largely prevent or minimize the stripping gaps 7.
  • the seal consists of inherently rigid sealing elements 11, which are composed of a plurality of juxtaposed, skid-like plates.
  • the plates of each sealing element 11 are pivotally mounted in bearings 12 which are arranged on the wiper 6.
  • the sealing elements 11 lie below the wipers 5 over the entire length of the grate rollers 1 on their outer surface.
  • Each plate of a sealing element 11 is individually supported on the wiper carrier 6 via one or more spring elements.
  • one or more brackets 13 are fastened on the side facing away from the grate roller 1 on each plate of the sealing elements 11.
  • the holder 13 is provided with two pins 14, between which a sliding element, preferably a leaf spring 15, is slidably guided.
  • the leaf springs 15 are rotatably connected to a shaft 16.
  • the shaft 16 is guided to the outside and is supported in bearings 17 which are held on the wiper carrier 6 and on the stand supporting the roller grate.
  • An actuating lever 18 engages the shaft 16.
  • a cover 19 is provided above the sealing elements 11, which cover is firmly connected to the wiper carrier 6 and whose lower edge touches the sealing element 11. This cover 19 effects a seal between the wiper carrier 6 and the pivotably mounted sealing element 11. Material that falls from the fuel bed above the grate rollers 1 through the wiping gap 7 between the wiper 5 and the grate roller 1 collects in the space above the sealing elements 11 on and forms a cushion that increases the sealing effect of the sealing elements 11 and prevents further diarrhea of material.
  • the shaft 16 By pivoting the actuating lever 18 to a greater or lesser extent, the shaft 16 is rotated and the leaf springs 15 used as spring elements become corresponding more or less tense. As a result, the contact pressure of the pivotably mounted sealing elements 11 on the surface of the grate roller 1 is variably set. If necessary, by rotating the shaft 16 in the opposite direction, the sealing elements 11 can also be pivoted away from the surface of the grate roller 1 during operation and brought into the position A shown in broken lines. Material that has accumulated in the space between the grate roller 1 and the sealing element 11 is emptied into the ash funnel 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Gasification And Melting Of Waste (AREA)

Claims (5)

  1. Grille à rouleaux pour installations de combustion, en particulier installations d'incinération d'ordures, avec des rouleaux de grille creux (1) de forme cylindrique, disposés les uns à côté des autres suivants des axes parallèles, le long d'un plan (3) incliné, et entre lesquels est respecté un espace intermédiaire, dans lequel sont disposés des racleurs (5) qui sont fixés sur un porte-racleur (6) disposé au-dessous de l'espace intermédiaire, caractérisée en ce que, au-dessous des racleurs (5), sont disposés des éléments d'étanchéité (11) en forme de tourillons à pivotement pressés élastiquement sur la totalité de sa longueur contre le rouleau de grille (1).
  2. Grille à rouleaux selon la revendication 1, caractérisée en ce que les éléments d'étanchéité (11) sont pressés contre le rouleau de grille (1) au moyen d'éléments élastiques, tourillonnant à pivotement.
  3. Grille à rouleaux selon la revendication 1, caractérisée en ce que chaque élément d'étanchéité (11) est constitué de plusieurs plaques situées très près les unes des autres, soutenues élastiquement individuellement.
  4. Grille à rouleaux selon les revendications 1 à 3, caractérisée en ce que les éléments élastiques sont constitués de ressorts à lames (15) reliés entre eux, assujettis en rotation à un arbre (16) et guidés pour permettre un coulissement de chacun dans une fixation (13), située sur l'élément d'étanchéité (11) du côté opposé au rouleau de grille (1).
  5. Grille à rouleaux selon les revendications 1 à 4, caractérisée en ce qu'est prévu un recouvrement (19) entre l'élément d'étanchéité (11) tourillonnant à pivotement et le porte-racleur (6), le recouvrement (19) étant fixé de manière rigide sur le porte-racleur (6).
EP94105221A 1993-05-15 1994-04-02 Grille à rouleaux pour installations de combustion Expired - Lifetime EP0625675B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4316343 1993-05-15
DE4316343A DE4316343A1 (de) 1993-05-15 1993-05-15 Walzenrost für Verbrennungsanlagen

Publications (3)

Publication Number Publication Date
EP0625675A2 EP0625675A2 (fr) 1994-11-23
EP0625675A3 EP0625675A3 (fr) 1995-04-26
EP0625675B1 true EP0625675B1 (fr) 1996-09-18

Family

ID=6488211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94105221A Expired - Lifetime EP0625675B1 (fr) 1993-05-15 1994-04-02 Grille à rouleaux pour installations de combustion

Country Status (9)

Country Link
US (1) US5448957A (fr)
EP (1) EP0625675B1 (fr)
JP (1) JPH06323524A (fr)
KR (1) KR100307772B1 (fr)
CN (1) CN1041017C (fr)
AT (1) ATE143122T1 (fr)
DE (2) DE4316343A1 (fr)
ES (1) ES2091652T3 (fr)
PL (1) PL174006B1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4418924C2 (de) * 1993-01-13 1997-04-24 Rbu Rolf Becker Gmbh Ingenieur Verbrennungskessel mit einstellbaren Dichtelementen an einem Walzenrost
ATE193935T1 (de) * 1995-03-21 2000-06-15 Babcock Anlagen Gmbh Verfahren und walzenrost zum verbrennen von müll
DE59503782D1 (de) * 1995-03-21 1998-11-05 Babcock Anlagen Gmbh Walzenrost
AT410128B (de) * 2000-11-08 2003-02-25 Ferdinand Dipl Ing Tischler Rost für feste brennstoffe
ITVI20060060A1 (it) * 2006-03-08 2007-09-09 B & B Elevators Srl Camera di combustione

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258541C2 (de) * 1965-04-29 1973-09-20 Rost fuer grossfeuerungsanlagen
SU1020706A1 (ru) * 1981-12-21 1983-05-30 Ордена Трудового Красного Знамени Академия Коммунального Хозяйства Им.К.Д.Памфилова Колосникова решетка
SU1015191A1 (ru) * 1981-12-30 1983-04-30 Ордена Трудового Красного Знамени Академия Коммунального Хозяйства Им.К.Д.Памфилова Колосникова решетка
DE3420020A1 (de) * 1983-12-23 1985-07-04 Müllverbrennungsanlage Wuppertal GmbH, 5600 Wuppertal Roststab sowie rostwalze fuer den walzenrost z.b. einer muellverbrennungsanlage oder dergleichen
DD244801A1 (de) * 1985-12-24 1987-04-15 Karl Marx Stadt Energie Betriebsabschlaemmeinrichtung fuer schmutzsammler an heizwasserleitungen
US4728289A (en) * 1987-03-10 1988-03-01 Westinghouse Electric Corp. Axial seal system for rotary combustor
DK0396908T3 (da) * 1989-05-10 1994-09-19 Babcock Anlagen Gmbh Riststav og ristvalse
FR2647532B1 (fr) * 1989-05-25 1991-09-06 Picard Fours Rouleau de grille de foyer, notamment pour incineration de dechets, avec un garnissage tubulaire forme d'anneaux de barreaux separes par des intervalles de soufflage de largeur maintenue
US4972786A (en) * 1990-04-06 1990-11-27 Westinghouse Electric Corp. Finned tubed rotary combustor
US5042401A (en) * 1990-06-04 1991-08-27 Westinghouse Electric Corp. Water cooled rolling grate incinerator
US5112222A (en) * 1991-05-01 1992-05-12 Westinghouse Electric Corporation Debris tolerant seal
US5173045A (en) * 1991-09-27 1992-12-22 Westinghouse Electric Corp. Radial seal for rotary combustor

Also Published As

Publication number Publication date
JPH06323524A (ja) 1994-11-25
ES2091652T3 (es) 1996-11-01
ATE143122T1 (de) 1996-10-15
CN1101114A (zh) 1995-04-05
EP0625675A3 (fr) 1995-04-26
PL174006B1 (pl) 1998-05-29
DE59400668D1 (de) 1996-10-24
US5448957A (en) 1995-09-12
EP0625675A2 (fr) 1994-11-23
DE4316343A1 (de) 1994-11-17
KR100307772B1 (ko) 2001-12-15
CN1041017C (zh) 1998-12-02

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