EP0663565B1 - Barreau de grille et grille avec dispositif de refroidissement et procédé de refroidissement - Google Patents

Barreau de grille et grille avec dispositif de refroidissement et procédé de refroidissement Download PDF

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Publication number
EP0663565B1
EP0663565B1 EP94116297A EP94116297A EP0663565B1 EP 0663565 B1 EP0663565 B1 EP 0663565B1 EP 94116297 A EP94116297 A EP 94116297A EP 94116297 A EP94116297 A EP 94116297A EP 0663565 B1 EP0663565 B1 EP 0663565B1
Authority
EP
European Patent Office
Prior art keywords
grate
bars
bar
grate bars
grate bar
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.)
Revoked
Application number
EP94116297A
Other languages
German (de)
English (en)
Other versions
EP0663565A3 (fr
EP0663565A2 (fr
Inventor
Holger Kleen
Hans-Günther Dr. Mayer
Wolfram Dr. Schnabel
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.)
Noell KRC Energie und Umwelttechnik GmbH
Original Assignee
KRC Umwelttechnik GmbH
Noell KRC Energie und Umwelttechnik 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6507958&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0663565(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KRC Umwelttechnik GmbH, Noell KRC Energie und Umwelttechnik GmbH filed Critical KRC Umwelttechnik GmbH
Publication of EP0663565A2 publication Critical patent/EP0663565A2/fr
Publication of EP0663565A3 publication Critical patent/EP0663565A3/fr
Application granted granted Critical
Publication of EP0663565B1 publication Critical patent/EP0663565B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/002—Incineration of waste; Incinerator constructions; Details, accessories or control therefor characterised by their grates
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2700/00—Grates characterised by special features or applications
    • F23H2700/009—Grates specially adapted for incinerators
    • 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 bar and grate Cooling device and a method for cooling for Incinerators, especially from Waste incineration plants.
  • a grate with cooled grate bars is already known from document DE-U-9 309 198.
  • a grate for incinerators is usually formed by rows of grate bars that lie one above the other and extend transversely to the transport direction of the firing material. Grate firing is also used as a tried and tested apparatus for domestic waste incineration. The individual grids are covered with grate bars. These have the task of transporting the garbage, mixing (so-called stoking) and taking over the burnout. The processes of drying, preheating, degassing, gasification and C-burnout run on the grate, and thus the grate bars, one after the other.
  • the grate bars are provided with openings (slots, Gaps, holes, etc.) through the combustion air is blown.
  • the grate bars are particularly stressed by mechanical Abrasion as well as thermal and chemical wear. Corresponding wear leads to changes in the Fire management, the burnout qualities and ultimately too Business interruptions.
  • the wear of the grate bars is essentially temperature-dependent.
  • the invention has for its object grate bars and to create a grate that burns when burning high-calorie fabrics are wear-resistant, their shape do not change and thus also the combustion behavior as well as the transport and mixing behavior in the oven change.
  • good emergency running properties are said to Water loss and a relatively low warming of the Water to less than 100 degrees Celsius is preferred less than 50 degrees Celsius can be reached.
  • steam formation is to be effectively prevented will.
  • the grate bar according to the invention with a cooling device on which at least one inlet and one outlet opening are arranged has at least one channel for guidance in the grate bar of cooling water, essentially in the longitudinal direction of the Rust bar, on. Since the longitudinal direction of the grate bar This corresponds to the material feed device particularly good cooling of the individual grate bars reached. By cooling every single grate bar the heating of the cooling medium can be relatively low being held. This increases the operational safety of the Cooling and the service life of the grates respectively Cooling system. Water is preferred as the cooling medium used. Other, higher-boiling cooling media are for special applications can also be used.
  • the channel arranged in the grate bar preferably has two, substantially parallel sections with each other opposite flow direction, this with one arranged in the head area of the grate bar Redirection are connected.
  • the sections of the canal with opposite flow direction can in the horizontal or vertical plane side by side or lie on top of each other.
  • the channels are in the With regard to the heat to be dissipated fluidically optimized so that the heating of the coolant is not more than about 50 degrees Celsius, preferably about 20 degrees Celsius is.
  • approximately parallel sections of the cooling channel can this different cross-sectional shapes and areas exhibit.
  • the one arranged in the head area of the grate bar Redirection can lie in the plane caused by the Central axes of the approximately parallel sections of the Cooling channel goes.
  • the deflection is preferred up to the range of an adjacent row of grate bars resting on the edge of the Grate rod head led. It is in the area of The grate bar head is approximately U-shaped.
  • the inlet and outlet openings for the coolant are arranged at the foot of the grate bar in the area of the coolant at the foot of the grate bar in the area of the grate bar support.
  • Air outlet openings for combustion air are further preferably arranged in the head part. This further improves the cooling of the grate bar.
  • recesses for the exit of combustion air are also arranged in the long sides of the grate bar.
  • This Cooling system advantageously consists of one Expansion or compensation vessel (32), the cooled Grate bars (34), a recooler (35) and a pump (36) and a connection (31) for filling or Draining of the cooling system together with the pressure control valve (33).
  • the cooling medium When using water, the cooling medium is in one Cooling system under pressure, preferably between 1 and 6 bar operated. This will cause steam to form avoided and e.g. a two-phase flow or formation of "steam pillows" with correspondingly worse Prevents heat transfer.
  • a particularly preferred feature of the invention are between the main inlet and outlet and inlet and Drain opening of the first or last grate bar a row of grate bars or a section of one Row of grate bars in which the inlet and outlet openings of the individual grate bars are connected in series, Valves for the supply or discharge of another Cooling medium, especially air, and Interruption of the main inflow or outflow line arranged.
  • This has the advantage that in the event of a leak in one or more grate bars in a row of grate bars air cooling is used instead of water cooling and thus the operation until the next planned Downtime can be maintained.
  • rows of grate bars with low thermal loads can be with cheaper cooling media, such as. B. air, cooled will.
  • the combination of several rows of grate bars in Parallel connection to rust zones with common connection or Drain pipe and valves for supply or discharge another cooling medium, in particular air, and Shut-off to the main inlet or outlet line discloses a particularly economical variant.
  • Figure 1 is a grate bar 1 with grate bar support 2 in Area of the grate bar base 3 shown.
  • the grate bar head 4 lies with the edge 5 on a grate bar adjacent row of grate bars.
  • the grate bar consists of Cast iron. It has a channel 6, which is approximately parallel Has sections (one behind the other in Figure 1). This parallel sections are by a deflection 7th connected with each other.
  • Channel 6 is related Provide drain openings 8. This feed and Drain openings are preferably located directly on the foot side End of the channel 6 attached.
  • FIG 2 is a section II-II of Figure 1 through the Grate bar head 4 shown.
  • the roughly parallel Sections of channel 6, here referred to as 6 'and 6' ' open into a deflection 7, which is in the plane of Section II is approximately U-shaped down to the bottom Edge 5 of the grate bar head 4 is guided.
  • air outlet openings 9 are provided in the grate bar head 4 between and next to the legs of the U-shaped Deflection 7 .
  • Figure 3 is a section II of Figure 1 for a Execution shown, in which the deflection is not in the area of the edge 5 is drawn.
  • the redirection 7 forms here together with the channel sections 6 'and 6' ' in their plane also an approximately U-shaped Cross-section.
  • the sections 6 'and 6 '' can also be arranged one above the other.
  • FIG. 1 A flow diagram of a grate is shown in FIG.
  • main inlet and the main outlet line 11 of a cooling medium in particular water
  • 12 and drain opening 13 of the first 14 and last 15 Grate bar of each row of grate bars their addition or Drain openings of the individual grate bars in a row are connected to one another, valves for supply or Removal 17 of a further cooling medium, in particular air, as well as to interrupt the main inlet 18 or Main drain line 19 arranged.
  • the feed of the second Cooling medium takes place via the main supply line 20 or Main discharge line 21.
  • a preferred direction of waste flow arrow 22 indicates.
  • the grate according to the invention and the grate bar have the Advantage that the grate bars without changing the Incinerator can be used. It stays therefore with the previous combustion technology. That too mechanical transport and mixing behavior (forward / return stroke) stay unchanged. This applies to both the weight also the stroke length and so on.
  • the rust is also extremely wear-resistant, as the grate bars are made as before Cast. Therefore, the grate bar according to the invention and rust also have excellent emergency running properties Malfunctions, for example in the event of water failure.
  • the grate bars preferably have the hitherto known Form on, with the width of the grate bars approximately doubled is, so that in one half, that is, so far usual grate bar width, the cooling water forward to in head is headed and in the second half again is returned.
  • the parallel channel sections face a clear height of about 15 to 25 mm and a clear Width of about 40 to 60 mm.
  • the flow rate is between 0.5 and 2 m per second.
  • the temperature the grate bar is approximately in the middle between head and Foot area around 100 degrees Celsius. This will make one Corrosion caused by condensation avoided. In the area of Headboard will have a temperature of about 150 degrees Celsius adhered to so that with regard to the burnout behavior no disadvantage arises.
  • the Grate bars or the grates in a closed, under Pressure water-cooled cooling system integrated and operated.
  • the temperature of the water is for example 90 ° C, but increased to 120 ° C and the system pressure is 1 to 6 bar, preferably 5 bar.
  • the cooling system pressure is via a compressor, the air in via a bubble from the water side separated outside space of an expansion vessel or Compensation vessel promotes, adjusted.
  • the system pressure in the cooling water circuit is via one in the expansion tank integrated automatic expansion set: On Contact manometer starts the compressor of the Expansion machines as soon as a lower limit pressure in the System is achieved. The compressor is switched off as soon as the pressure reaches an upper limit. At Exceeding an adjustable top Limit pressure value, e.g. 6 bar, air is through a valve blown off. The two switching points are adjustable between 1.0 and 6.0 bar.
  • FIG. 5 is the diagram of a cooling device shown.
  • the pump 36 promotes this Water through one or more grate bars or grate 34 and the cooling device.
  • the expansion or Compensation vessel 32 with a Provide level measuring device, with the help of Automatically falls below a lower limit fresh water is fed into the system and at the same time a message is sent to the control room.
  • the infeed will reach an upper limit level automatically interrupted by water. By the frequency the message to the control room about the water feed leaks in the system can be recognized, so that appropriate measures can be initiated.
  • the grate bar or each row of grate bars can be locked separately.
  • are as measuring devices Water mass flow measuring device 37, a Temperature measuring device, 38, 39 and one Cooling system pressure measuring device 40 is provided. Of the Fan 41 cools the recooler 35.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Processing Of Solid Wastes (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Baking, Grill, Roasting (AREA)

Claims (13)

  1. Barreau de grille en fonte avec dispositif de refroidissement, pour la fabrication d'une grille d'incinérateur comprenant plusieurs barreaux de grille juxtaposés sur la largeur de la grille, un orifice d'admission et un orifice d'évacuation pour de l'eau de refroidissement étant ménagés dans ledit barreau de grille, et au moins un conduit (6) pour la conduite d'eau de refroidissement traversant le barreau de grille (1) essentiellement dans le sens de la longueur dudit barreau de grille (1).
  2. Barreau de grille suivant la revendication 1, caractérisé en ce que le conduit (2) présente des tronçons (6', 6") sensiblement parallèles avec sens d'écoulement opposé, ces derniers étant en relation avec un coude (7) prévu dans la partie supérieure (4) du barreau de grille.
  3. Barreau de grille suivant la revendication 2, caractérisé en ce que le coude (7) est conduit jusque dans la zone du bord (5) de la tête (4) du barreau de grille qui se trouve en appui sur une rangée de barreaux de grille contiguë, et est en particulier à peu près en forme de U dans la région de la tête (4) du barreau de grille.
  4. Barreau de grille suivant la revendication 3, caractérisé en ce que des orifices d'admission et d'évacuation (8) sont ménagés dans le pied (3) du barreau de grille (1), dans la zone du support (2) de barreau de grille.
  5. Barreau de grille suivant l'une des revendications 1 à 4, caractérisé en ce que des orifices d'échappement d'air (9) sont ménagés dans la partie supérieure (4).
  6. Barreau de grille suivant l'une des revendications 1 à 5, caractérisé en ce que des évidements pour l'échappement de l'air sont ménagés dans les côtés longitudinaux du barreau de grille (1).
  7. Grille pour fours d'incinération, en particulier d'installations d'incinération des déchets, comprenant des séries juxtaposées de rangées de barreaux de grille en alternance fixes et mobiles constituées de barreaux de grilles suivant les revendications 1 à 6, caractérisée en ce que des orifices d'admission et d'évacuation (8) de tous les barreaux de grille sont mis en relation, avec couplage en parallèle, avec une conduite d'admission principale et une conduite d'évacuation principale, respectivement.
  8. Grille pour fours d'incinération, en particulier d'installations d'incinération des déchets, comprenant des séries juxtaposées de rangées de barreaux de grille en alternance fixes et mobiles constituées de barreaux de grilles suivant les revendications 1 à 6, caractérisée en ce que des orifices d'admission et d'évacuation (8) de plusieurs barreaux de grille contigus sont reliés entre eux avec couplage en série.
  9. Grille pour fours d'incinération, en particulier d'installations d'incinération des déchets, comprenant des séries juxtaposées de rangées de barreaux de grille en alternance fixes et mobiles constituées de barreaux de grilles suivant les revendications 1 à 6, caractérisée en ce qu'on a prévu sur la grille un dispositif de refroidissement fermé fonctionnant en surpression, en particulier avec un compresseur et un vase d'expansion.
  10. Grille pour fours d'incinération, en particulier d'installations d'incinération des déchets, comprenant des séries juxtaposées de rangées de barreaux de grille constituées de barreaux de grilles suivant les revendications 1 à 6, caractérisée en ce que des soupapes pour l'amenée (16) et l'évacuation (17) d'un autre fluide de refroidissement, en particulier de l'air, ainsi que pour couper la conduite d'admission principale (18) respectivement la conduite d'évacuation principale (19) sont disposées entre la conduite d'admission principale (10) et la conduite d'évacuation principale (11) et l'orifice d'admission (12) respectivement d'évacuation (13) du premier (14) respectivement du dernier (15) barreau de grille d'une rangée de barreaux de grille dans laquelle les orifices d'admission et d'évacuation des divers barreaux de grille sont couplés en série les uns aux autres.
  11. Grille pour fours d'incinération, en particulier d'installations d'incinération des déchets, comprenant des séries juxtaposées de rangées de barreaux de grille constituées de barreaux de grilles suivant la revendication 10, caractérisée en ce que plusieurs rangées de barreaux de grille sont reliées entre elles avec couplage en parallèle par rapport à des zones de grille, et présentent une conduite d'admission et d'évacuation commune dans laquelle sont agencées des soupapes servant à l'amenée et à l'évacuation d'un autre fluide de refroidissement, de préférence de l'air.
  12. Procédé de refroidissement direct de barreaux de grille et de grilles de fours d'incinération suivant l'une des revendications 1 à 11, caractérisé en ce que le fluide de refroidissement traversant le barreau de grille ou la grille est conduit sous surpression dans un système de refroidissement.
  13. Procédé suivant la revendication 12, caractérisé en ce que la surpression du dispositif de refroidissement peut être ajustée au moyen d'un vase d'expansion couplé à un compresseur.
EP94116297A 1994-01-14 1994-10-15 Barreau de grille et grille avec dispositif de refroidissement et procédé de refroidissement Revoked EP0663565B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4400992 1994-01-14
DE4400992A DE4400992C1 (de) 1994-01-14 1994-01-14 Roststab und Rost mit Kühleinrichtung

Publications (3)

Publication Number Publication Date
EP0663565A2 EP0663565A2 (fr) 1995-07-19
EP0663565A3 EP0663565A3 (fr) 1996-02-14
EP0663565B1 true EP0663565B1 (fr) 1998-12-09

Family

ID=6507958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94116297A Revoked EP0663565B1 (fr) 1994-01-14 1994-10-15 Barreau de grille et grille avec dispositif de refroidissement et procédé de refroidissement

Country Status (8)

Country Link
US (1) US5636581A (fr)
EP (1) EP0663565B1 (fr)
KR (1) KR100279201B1 (fr)
AT (1) ATE174418T1 (fr)
CA (1) CA2140218A1 (fr)
DE (2) DE4400992C1 (fr)
ES (1) ES2127867T3 (fr)
TW (1) TW270971B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014008858A1 (de) 2014-06-16 2015-12-17 Joachim Kümmel Verfahren zur Verbrennung von Abfall und Biomassen auf einem Flossenwand-Stufenrost sowie Vorrichtung zur Durchführung des Verfahrens

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DK171048B1 (da) * 1995-01-24 1996-04-29 Voelund Ecology Systems As Brændselstransporterende forbrændingsrist til forbrændingsanlæg, navnlig affaldsforbrændingsanlæg
CH689519A5 (de) * 1995-05-17 1999-05-31 Von Roll Umwelttechnik Ag Gekuehlter Rostblock.
DE19528310A1 (de) * 1995-08-02 1997-02-06 Abb Management Ag Rost für eine Feuerungsanlage
DE19622424C2 (de) 1996-06-04 1998-10-29 Martin Umwelt & Energietech Rostelement und Rost mit Flüssigkeitskühlung
DE19648128C2 (de) 1996-11-21 2002-11-07 Alstom Rost für eine Feuerungsanlage
DE19650742C1 (de) * 1996-12-06 1998-02-19 Metallgesellschaft Ag Mit Wasser gekühlter Verbrennungsrost
EP0919771B1 (fr) * 1997-10-29 2000-11-29 Doikos Investments Ltd Procédé de combustion pour matières solides sur une grille coulissante refroidie par eau, ainsi que barreau de grille et grille pour la mise en oeuvre du procédé
EP0972989A1 (fr) 1998-07-15 2000-01-19 Asea Brown Boveri AG Procédé de combustion de solides
EP0987494A1 (fr) 1998-09-15 2000-03-22 Asea Brown Boveri AG Procédé pour le refroidissement d'une grille d'un foyer et grille d'un foyer
DE19860553C2 (de) * 1998-12-22 2001-03-29 Mannesmann Ag Flüssigkeitsgekühlter Verbrennungsrost
DE19860552C2 (de) * 1998-12-22 2001-02-08 Mannesmann Ag Kühlbarer Verbrennungsrost
DE19929614C2 (de) * 1999-06-28 2001-04-26 Martin Umwelt & Energietech Feuerungsanlage mit flüssigkeitsgekühlten Rostelementen
DE19943665B4 (de) 1999-09-13 2006-04-13 Martin GmbH für Umwelt- und Energietechnik Verfahren zur Kühlung eines Rostes für einen Feuerraum mittels Wasser sowie Rost zur Verbrennung von Feststoffen
WO2002021049A1 (fr) * 2000-09-04 2002-03-14 Theodor Koch Barreau de grille a refroidissement par du liquide pour des incinerateurs
KR20050013147A (ko) * 2002-06-24 2005-02-02 존 엔. 시니어 베이직 온도조절 소각로 건조격자
DE102004034322B4 (de) * 2004-07-15 2006-09-28 Lurgi Lentjes Ag Rostplatte
DE502006002556D1 (de) * 2005-09-06 2009-02-26 Ernst Schenkel Wassergekühltes Rostelement
US9032948B1 (en) * 2008-05-29 2015-05-19 Jeffrey M. Petteway Seasoning grill
SI2751488T1 (en) 2011-09-01 2018-08-31 Ernst Schenkel Grill for burning solid material
DE102014004660A1 (de) 2014-02-10 2015-08-13 Joachim Kümmel Verfahren zur Verbrennung von Abfall und Biomassen auf einem luftgekühlten Rost sowie Vorrichtung zur Durchführung des Verfahrens
DE102014106200A1 (de) 2014-05-05 2015-11-05 Tiska Gmbh kühlbarer Roststab für einen Vorschubrost einer Verbrennungsanlage
KR102485539B1 (ko) * 2022-05-17 2023-01-06 에스엠메탈(주) 소각로용 화격자

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014008858A1 (de) 2014-06-16 2015-12-17 Joachim Kümmel Verfahren zur Verbrennung von Abfall und Biomassen auf einem Flossenwand-Stufenrost sowie Vorrichtung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
DE4400992C1 (de) 1995-05-11
ES2127867T3 (es) 1999-05-01
EP0663565A3 (fr) 1996-02-14
KR950033253A (ko) 1995-12-22
EP0663565A2 (fr) 1995-07-19
ATE174418T1 (de) 1998-12-15
TW270971B (fr) 1996-02-21
CA2140218A1 (fr) 1995-07-15
US5636581A (en) 1997-06-10
DE59407443D1 (de) 1999-01-21
KR100279201B1 (ko) 2001-02-01

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