EP0472027B1 - Grate surface - Google Patents

Grate surface Download PDF

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Publication number
EP0472027B1
EP0472027B1 EP91112990A EP91112990A EP0472027B1 EP 0472027 B1 EP0472027 B1 EP 0472027B1 EP 91112990 A EP91112990 A EP 91112990A EP 91112990 A EP91112990 A EP 91112990A EP 0472027 B1 EP0472027 B1 EP 0472027B1
Authority
EP
European Patent Office
Prior art keywords
grate
grate bar
recesses
flow
air
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
EP91112990A
Other languages
German (de)
French (fr)
Other versions
EP0472027A3 (en
EP0472027A2 (en
Inventor
Rolf Merz
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.)
GE Power Systems GmbH
Original Assignee
EVT Energie und Verfahrenstechnick GmbH
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 EVT Energie und Verfahrenstechnick GmbH filed Critical EVT Energie und Verfahrenstechnick GmbH
Publication of EP0472027A2 publication Critical patent/EP0472027A2/en
Publication of EP0472027A3 publication Critical patent/EP0472027A3/en
Application granted granted Critical
Publication of EP0472027B1 publication Critical patent/EP0472027B1/en
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
    • F23H17/12—Fire-bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H1/00—Grates with solid bars
    • F23H1/02—Grates with solid bars having provision for air supply or air preheating, e.g. air-supply or blast fittings which form a part of the grate structure or serve as supports

Definitions

  • the invention relates to an air-cooled grate covering mounted on cross members for feed grates, particularly in waste incineration plants, two grate bars arranged next to one another each forming a flow channel which is delimited by the grate bar bridges, the grate bar base and its supporting webs and has an outlet to the combustion chamber through recesses arranged in the grate bar head.
  • Such a grate has become known from DE-C-37 25 585.
  • This known grate covering has proven itself well in operational use, but it can happen from time to time during the forward movement of the movable grate bar rows that garbage and / or slag particles penetrate into the air outlets of the grate bars and through the nozzle-shaped design of the air outlets (decreasing cross-section in the air flow direction ) get stuck and are carried along when the movable rows of grate bars move backwards.
  • the invention specified in claim 1 has for its object to provide a grate covering according to the preamble of claim 1, which reduces the risk of clogging of the air outlets.
  • the air outlets are at an angle of up to 60 ° to the bottom of the grate bar, the penetration of garbage and / or slag particles is made more difficult and insofar as this actually occurs, the detachment is usually promoted when the rows of grate bars move backwards.
  • the design of the grate bars for cooling the grate bar and the trouble-free operation of a feed grate for a waste incineration plant has an advantageous effect.
  • the grate bar 1 shown in FIGS. 1 to 7 has the grate bar bridge 6, the grate bar head 3, the grate bar base 9, the web 4, which is provided with lateral edges 8.
  • the chamfered grate bar head 3 is provided with a plurality of recesses 7 and the projections 10 and 11.
  • the grate bars arranged side by side in FIGS. 3 and 4 together form the air guide path 2, which is delimited by the underside of the grate bar bridge 6, the grate bar base 9, the web 4 and the lateral edges 8.
  • the air duct 2 has through the recesses 7 in the side edges 8 of the grate rod heads 3 outlet to the combustion chamber 5th

Landscapes

  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Incineration Of Waste (AREA)
  • Baking, Grill, Roasting (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Beans For Foods Or Fodder (AREA)
  • Detergent Compositions (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Solid-Fuel Combustion (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Meat, Egg Or Seafood Products (AREA)

Abstract

Air-cooled grate surface, in particular for stoking grates in refuse incineration plants, two adjacently arranged grate bars in each case forming a flow channel, which is bounded by the grate bar back, the grate bar foot and its supporting webs and has an outlet to the combustion space through clearances arranged in the grate bar head. An improved cooling of the grate bar back is achieved and clogging of the air outlets by refuse and slag particles is avoided in the following way a) the air outlets formed by two clearances (7) have a cross-sectional widening in the direction of flow; b) the air outlets have an angle B = 5 DEG to 60 DEG with respect to the grate bar back (6) downwards in the direction of flow; c) the grate bar head (3) is bevelled from the top towards the rear and has from lateral edges (8) one or more clearances (7) arranged one above the other.

Description

Die Erfindung betrifft einen auf Querträgern gelagerten luftgekühlten Rostbelag für Vorschubroste, insbesondere bei Müllverbrennungsanlagen, wobei zwei nebeneinander angeordnete Roststäbe jeweils einen Strömungskanal bilden, der durch den Roststabrücken, den Roststabfuß und dessen stützende Stege begrenzt ist und durch im Roststabkopf angeordnete Ausnehmungen Auslaß zum Feuerraum hat, wobei der Roststabkopf von oben her nach hinten abgeschrägt ist und von seinen seitlichen Rändern aus mehrere übereinander angeordnete Ausnehmungen aufweist und oberhalb und zwischen den Ausnehmungen jeweils Vorsprünge vorgesehen sind, die sich über die ganze Breite bzw. Tiefe des Roststabes erstrecken, wobei die durch zwei Ausnehmungen gebildeten Luftauslässe einen Winkel B = 5° bis 60° zum Roststabrücken nach unten in Strömungsrichtung aufweisen.The invention relates to an air-cooled grate covering mounted on cross members for feed grates, particularly in waste incineration plants, two grate bars arranged next to one another each forming a flow channel which is delimited by the grate bar bridges, the grate bar base and its supporting webs and has an outlet to the combustion chamber through recesses arranged in the grate bar head. wherein the grate bar head is chamfered from the top to the rear and from its lateral edges has a plurality of recesses arranged one above the other and above and between the recesses there are projections which extend over the entire width or depth of the grate bar, the through two recesses formed air outlets have an angle B = 5 ° to 60 ° to the grate bar down in the flow direction.

Ein derartiger Rostbelag ist durch die DE-C-37 25 585 bekanntgeworden. Dieser bekannte Rostbelag hat sich beim betrieblichen Einsatz gut bewährt, jedoch kann es bei der Vorwärtsbewegung der beweglichen Roststabreihen von Zeit zu Zeit vorkommen, daß Müll und/oder Schlackenpartikel in die Luftauslässe der Roststäbe eindringen und durch die düsenförmige Ausbildung der Luftauslässe (abnehmender Querschnitt in Luftströmungsrichtung) sich festsetzen und bei der Rückwärtsbewegung der beweglichen Roststabreihen mitgetragen werden. Durch die weiteren Vor- und Rückbewegungen der beweglichen Roststabreihen werden der eingedrungene Müll und/oder die Schlackenpartikel noch weiter in die Luftauslässe gepreßt und verstopfen diese mit dem Ergebnis, daß die Luftverteilung beeinträchtigt wird und die Roststäbe überhitzen und Störfälle verursachen.Such a grate has become known from DE-C-37 25 585. This known grate covering has proven itself well in operational use, but it can happen from time to time during the forward movement of the movable grate bar rows that garbage and / or slag particles penetrate into the air outlets of the grate bars and through the nozzle-shaped design of the air outlets (decreasing cross-section in the air flow direction ) get stuck and are carried along when the movable rows of grate bars move backwards. Due to the further back and forth movements of the movable grate bar rows, the garbage and / or the slag particles that have penetrated are pressed even further into the air outlets and clog them, with the result that the air distribution is impaired and the grate bars overheat and cause malfunctions.

Der im Anspruch 1 angegebenen Erfindung liegt die Aufgabe zugrunde, einen Rostbelag nach dem Oberbegriff des Anspruches 1 zu schaffen, der die Verstopfungsgefahr der Luftauslässe reduziert.The invention specified in claim 1 has for its object to provide a grate covering according to the preamble of claim 1, which reduces the risk of clogging of the air outlets.

Diese Aufgabe wird aufgrund der Maßnahmen des Anspruches 1 gelöst.This object is achieved on the basis of the measures of claim 1.

Durch die erfindungsgemäße Ausbildung der Luftauslässe, die eine Querschnittserweiterung in Luftströmungsrichtung aufweisen, werden Müll und/oder Fremdkörper, die bei der Vorwärtsbewegung der beweglichen Roststabreihen in die Luftauslässe eindringen, bei der Rückwärtsbewegung der beweglichen Roststabreihen kaum mitgetragen, sondern sie lösen sich von den Luftauslässen, unterstützt durch die Luftströmung, und fallen nach unten auf die ortsfesten Roststabreihen, wo sie verbrennen und die entstehende Asche ausgetragen wird.Due to the inventive design of the air outlets, which have a cross-sectional widening in the air flow direction, garbage and / or foreign bodies which penetrate into the air outlets during the forward movement of the movable grate bar rows are hardly carried along with the backward movement of the movable grate bar rows, but they detach from the air outlets, supported by the air flow, and fall down onto the fixed rows of grate bars, where they burn and the resulting ash is discharged.

Ferner wird, da die Luftauslässe einen Winkel bis zu 60° zum Roststabrücken nach unten aufweisen, das Eindringen von Müll und/oder Schlackenpartikel erschwert und insofern dies tatsächlich geschieht, das Loslösen bei der Rückwärtsbewegung der Roststabreihen meistens begünstigt.Furthermore, since the air outlets are at an angle of up to 60 ° to the bottom of the grate bar, the penetration of garbage and / or slag particles is made more difficult and insofar as this actually occurs, the detachment is usually promoted when the rows of grate bars move backwards.

Zusammenfassend wirkt sich die erfindungsgemäße Ausbildung der Roststäbe für die Kühlung des Roststabrückens und den störungsfreien Betrieb eines Vorschubrostes für eine Müllverbrennungsanlage vorteilhaft aus.In summary, the design of the grate bars for cooling the grate bar and the trouble-free operation of a feed grate for a waste incineration plant has an advantageous effect.

Die Erfindung wird anhand der Beschreibung und der Zeichnungen näher erläutert:The invention is explained in more detail with reference to the description and the drawings:

Es zeigt:

Fig. 1
Seitliche Teilansicht des Roststabes
Fig. 2
Schnitt durch den Roststab gemäß Linie A-A
Fig. 3
Schnitt durch zwei nebeneinander angeordnete Roststäbe gemäß Linie A-A
Fig. 4
Schnitt durch zwei nebeneinander angeordnete Roststäbe gemäß Linie B-B
Fig. 5, 6 und 7
Jeweils seitliche Teilansichten des Roststabes mit verschiedenen Ausführungsformen der Luftauslässe
It shows:
Fig. 1
Partial side view of the grate bar
Fig. 2
Section through the grate bar according to line AA
Fig. 3
Section through two side by side grate bars according to line AA
Fig. 4
Section through two side by side grate bars according to line BB
5, 6 and 7
Side partial views of the grate bar with different embodiments of the air outlets

Der in den Figuren 1 bis 7 dargestellte Roststab 1 weist den Roststabrükken 6, den Roststabkopf 3, den Roststabfuß 9, den Steg 4, der mit seitlichen Rändern 8 versehen ist, auf. Der abgeschrägte Roststabkopf 3 ist mit mehreren Ausnehmungen 7 und den Vorsprüngen 10 und 11 versehen.The grate bar 1 shown in FIGS. 1 to 7 has the grate bar bridge 6, the grate bar head 3, the grate bar base 9, the web 4, which is provided with lateral edges 8. The chamfered grate bar head 3 is provided with a plurality of recesses 7 and the projections 10 and 11.

Die in den Figuren 3 und 4 nebeneinander angeordnete Roststäbe bilden zusammen den Luftführungsweg 2, der durch die Unterseite des Roststabrückens 6, den Roststabfuß 9, den Steg 4 und die seitlichen Ränder 8 begrenzt ist. Der Luftführungsweg 2 hat durch die Ausnehmungen 7 in den seitlichen Rändern 8 der Roststabköpfe 3 Auslaß zum Feuerraum 5.The grate bars arranged side by side in FIGS. 3 and 4 together form the air guide path 2, which is delimited by the underside of the grate bar bridge 6, the grate bar base 9, the web 4 and the lateral edges 8. The air duct 2 has through the recesses 7 in the side edges 8 of the grate rod heads 3 outlet to the combustion chamber 5th

LegendeLegend

11
RoststabGrate bar
22nd
LuftführungswegAir duct
33rd
RoststabkopfGrate bar head
44th
Stegweb
55
FeuerraumFirebox
66
RoststabrückenRust bar bridges
77
AusnehmungRecess
88th
seitliche Ränder des Roststabkopfeslateral edges of the grate head
99
RoststabfußGrate bar base
1010th
Vorsprunghead Start
1111
Vorsprunghead Start

Claims (2)

  1. Air-cooled grate surface arranged on transverse girders for pusher-type grates, in particular for refuse incineration plants, two grate bars (1) arranged side by side forming one flow duct each, which is limited by the back of the grate bar (6), the grate bar base (9) and its supporting webs (4) and which has an outlet to the furnace (5) by means of recesses arranged in the grate bar head (3), the grate bar head (3) chamfered from the top to the back showing several recesses from its lateral edges, said recesses being arranged one on top of the other, projections (10), (11) being provided above and between the recesses (7), which extend over the whole width and/or depth of the grate bar (1) respectively, the air exits formed by two recesses (7) showing an angle B = 5 ° to 60 ° to the back of the grate bar (6) downwards in the direction of flow, said grate surface being characterized in that the air exits formed by the two recesses (7) show an increasing cross-section in the direction of flow.
  2. Grate surface according to claim 1, characterized in that the increasing cross-section of the air exits formed by two recesses (7) has been produced by a multiple change of the angle of inclination of their enclosure walls.
EP91112990A 1990-08-23 1991-08-02 Grate surface Expired - Lifetime EP0472027B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4026587 1990-08-23
DE4026587A DE4026587C1 (en) 1990-08-23 1990-08-23

Publications (3)

Publication Number Publication Date
EP0472027A2 EP0472027A2 (en) 1992-02-26
EP0472027A3 EP0472027A3 (en) 1992-08-19
EP0472027B1 true EP0472027B1 (en) 1994-05-25

Family

ID=6412704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112990A Expired - Lifetime EP0472027B1 (en) 1990-08-23 1991-08-02 Grate surface

Country Status (9)

Country Link
EP (1) EP0472027B1 (en)
AT (1) ATE106130T1 (en)
CA (1) CA2049661A1 (en)
CS (1) CS259791A3 (en)
DE (1) DE4026587C1 (en)
ES (1) ES2056533T3 (en)
HU (1) HUT59475A (en)
PL (1) PL167178B1 (en)
PT (1) PT98744A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205502C1 (en) * 1992-02-22 1993-02-18 Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart, De Moving grate on transverse girders, for rubbish incinerator - has grate rod rear protruding over vertical shank of angled grate bar foot, forming gap between shank and downwards flange
DE29501162U1 (en) * 1994-01-27 1995-05-04 Wärmetechnik Dr. Pauli GmbH, 82131 Gauting Combustion grate for burning solid fuels such as waste, in particular to improve burnout
US6964237B2 (en) 2003-06-30 2005-11-15 Mark P. Hepp Grate block for a refuse incineration grate
DE102004032291B4 (en) * 2004-07-03 2006-07-13 Lurgi Lentjes Ag grate plate
DE102004034322B4 (en) * 2004-07-15 2006-09-28 Lurgi Lentjes Ag grate plate
KR20220025090A (en) * 2019-07-05 2022-03-03 히타치 조센 이노바 아게 Grate block for combustion grate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH382901A (en) * 1960-06-02 1964-10-15 Werner Dipl Ing Ludin Firing system for inferior, crumbly fuels that disintegrate during combustion, such as peat grits, rice bran, dried sewage sludge and the like
US4876972A (en) * 1987-01-21 1989-10-31 Louis Mrklas Grate bar element for a sliding grate furnace for garbage incineration
DE3725585C1 (en) * 1987-08-01 1988-10-06 Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart, De Non-clogging incinerator grate - has grate bars shaped so that cooling air channels are formed between them

Also Published As

Publication number Publication date
EP0472027A3 (en) 1992-08-19
ATE106130T1 (en) 1994-06-15
PL291480A1 (en) 1992-04-06
DE4026587C1 (en) 1991-10-17
ES2056533T3 (en) 1994-10-01
EP0472027A2 (en) 1992-02-26
PL167178B1 (en) 1995-08-31
CS259791A3 (en) 1992-03-18
CA2049661A1 (en) 1992-02-24
HU912726D0 (en) 1992-01-28
HUT59475A (en) 1992-05-28
PT98744A (en) 1993-09-30

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