EP0987494A1 - Verfahren zur Kühlung eines Rostes für einen Feuerungsraum sowie Rost für einen Feuerungsraum - Google Patents

Verfahren zur Kühlung eines Rostes für einen Feuerungsraum sowie Rost für einen Feuerungsraum Download PDF

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Publication number
EP0987494A1
EP0987494A1 EP98810918A EP98810918A EP0987494A1 EP 0987494 A1 EP0987494 A1 EP 0987494A1 EP 98810918 A EP98810918 A EP 98810918A EP 98810918 A EP98810918 A EP 98810918A EP 0987494 A1 EP0987494 A1 EP 0987494A1
Authority
EP
European Patent Office
Prior art keywords
grate
bars
grate bars
cooling
cavity
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.)
Ceased
Application number
EP98810918A
Other languages
German (de)
English (en)
French (fr)
Inventor
Max Künzli
John Millard
Peter Serck-Hanssen
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.)
Alstom SA
Original Assignee
ABB Schweiz AG
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Schweiz AG, ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Schweiz AG
Priority to EP98810918A priority Critical patent/EP0987494A1/de
Priority to TW088114104A priority patent/TW406171B/zh
Priority to US09/391,402 priority patent/US6213031B1/en
Priority to NO994401A priority patent/NO994401L/no
Priority to JP11258865A priority patent/JP2000088231A/ja
Priority to KR1019990039307A priority patent/KR20000023137A/ko
Publication of EP0987494A1 publication Critical patent/EP0987494A1/de
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H3/00—Grates with hollow bars
    • F23H3/04—Grates with hollow bars externally cooled, e.g. with water, steam or air
    • 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
    • F23H2900/00—Special features of combustion grates
    • F23H2900/03021—Liquid cooled grates

Definitions

  • the invention relates to a method for cooling a Grate for a furnace according to the generic term of Claim 1 and a grate for a furnace according to the preamble of claim 4.
  • Generic grids are used in furnace rooms e.g. B. from waste incineration plants used.
  • the cooling is done to increase their Downtimes by reducing the scaling of the Rust material under the influence of the heat of combustion.
  • the invention is based on the object, a more effective Specify a method for cooling a grate and one Rust, which is for the cooling process according to the invention particularly suitable. This task is accomplished by the characterizing features of claim 1 or claim 4 solved.
  • the rust supplied coolant in contact with the same in the essentially completely converted to steam, making them at low consumption can dissipate very high amounts of heat because both the heat transfer significantly improved as well amount of heat absorbed during evaporation is far greater than by simply heating in the liquid state could be included.
  • the steam generated does not have to can be returned, but can be in the under the grate outflow area. This allows the use very simple grids and cooling devices. Nevertheless, the heat absorbed by the steam can be reduced as part of the Heat recovery from the flue gas at least in part be recovered.
  • a grate according to the invention in a furnace Waste incineration plant has (Fig. 1a, b) according to a first Embodiment in a known manner several in the longitudinal direction overlapping successive rows 1, 1 'of relatively narrow Grate bars 2, the rear ends of each one transverse support rod 3; 3 'are supported while the front end on a grate bar of the previous one Row rests.
  • the movement successive support rods 3 'takes place in each case opposite, as can be seen from Fig. 1a, 1b, the show opposite limit positions in the movement.
  • Each of the grate bars 2 has an overhead cover wall 4 on that pulled down and in at its front end a shoe 5 is bent, which on the top of the preceding grate bar slides along and on which side walls 6 connect so that the top wall 4 and the side walls 6 comprise a downwardly open cavity 7.
  • the grate bars 2 are of simple shape and can therefore be produced in one piece and accordingly cheap.
  • Spray device In the underwind area 8 below the grate, in the primary air is also introduced through gaps between the grate bars 2 or openings in the same in the above of the grate lying combustion chamber 9 is one Spray device arranged, which consist of transverse fixed spray tubes 10, each of which one of a row 1, 1 'of grate bars 2 is assigned.
  • the Spray tubes 10 carry successive spray nozzles 11, which, as a cooling liquid, water into a certain, over the width of the grate is essentially constant Spray angular area 12.
  • the angular range 12 is set such that at the grate bars 2, which form a fixed row 1 include essentially the entire bottom of the top wall 4 is sprayed, while this is with grate bars 2, the one belong to moving row 1 ', only if they are in their advanced limit position. If they are withdrawn from this, the fixed angular range 12 only a decreasing front section of the top wall 4. However, this is not annoying, since the unrecognized rear section of each a grate bar 2 of the following fixed row 1 against the firebox 9 is covered. That part of the top wall 4, the top of which is part of the free surface of the Rust forms, is always sprayed and thus by the cooling detected.
  • the supply of cooling water to the grate is set so that it in contact with the grate bars 2 at least almost completely evaporated, so that from the Evaporative heat achievable cooling effect essentially is fully exploited. That in the underwind area 8 steam is usually partially or completely into the combustion chamber 9 with the primary air. The heat of vaporization contained in it can then be in the frame heat recovery from the flue gas as well be recovered. However, it is also possible at least part of the steam in the underwind area 8 to allow cooled surfaces to condense or from the Subtract underwind area and feed to a condenser and so to separate the steam and z. Tie Cooling water circuit and at the same time the Recover heat of vaporization immediately.
  • the spray device consists of three each transverse spray tubes 10a, b, c per row 1, 1 'of Grate bars 2, each close below the top wall 4 run through each grate bar 2 and each with respect to corresponding row 1, 1 'of grate bars 2 immovable are, d. H. those assigned to a fixed row 1 Spray tubes 10a, b, c are also arranged fixed in space associated with a movable row 1 ' or the crossbar 3 'carrying them connected to them be moved.
  • the spray tubes 10a, b, c in turn spray through spray nozzles Cooling water in solid angle ranges 12a, b, c that are set in this way are that they are each slightly overlapping each other adjoining areas of the underside of the top wall 4 to capture.
  • the sprayer is controlled so that only the foremost spray tubes 10a are in continuous operation are, while the rear spray tubes 10b, 10c each are turned off when the areas sprayed by them Grate bars 2 of a row 1, 1 'of grate bars 2 of the following Row 1'; 1 against the firebox 9 just covered anyway are.
  • the grate bars 2 are each made up of several parts welded together, in particular double-walled, d. H. runs parallel to the top wall 4 at a distance Bottom wall 13, which the cavity 7 against the Underwind area 8 closes. But he is against it in so far as it is in its highest area, that in the front end area of the rising grate bar 2 lies, a discharge opening 14, which from the mouth a short one leading into the underwind area 8 Pipe socket 15 is formed.
  • the grate bars 2 of the fixed rows 1, all on the same height, are in the cavities 7th leading closed pipe 16 with a first Reservoir 17 connected, the water level through a float 18 and one depending on it Position-controlled refill valve 19 in a known manner Is kept constant at a level that is just below the discharge opening 14.
  • the one in everyone Grate bar 2 by evaporating the cooling water and draining it off the steam caused by the vent 14 losses are caused by cooling water flowing in from the Reservoir 17 immediately equalized and the Water level in grate bar 2 kept constant.
  • the grate bars 2 of the movable rows 1 'in the rear limit position are also at the same height, are each one leading into their cavities 7 closed hose line 16 'or a combined pipe and Hose line 1 'or for each movable row also for each of the two groups of equally moving rows 1 'of Grate bars 2 contains a check valve 20, with a second reservoir 17 'connected, the water level in the same way as for the first reservoir 17 is kept constant.
  • the water level is on one Level that is just below the vent 14 of the Grate bar 2 is when the same as on the second Grate bar shown from the right, in the rear limit position located.
  • the grate bar 2 If the grate bar 2 is then pulled back, it opens Check valve 20 as soon as the water level in the grate bar among those in the reservoir 17 'sinks and the Grate bar 2 fills up again until the water level in the rear limit position just below the Discharge opening 14 is located.
  • the cooling device comes with a very simple control which are also made up of purely mechanical means can. It can therefore be manufactured very cheaply and requires very little maintenance.
  • the side walls the grate bars are missing, so that each has a cavity a whole series of grate bars extends.
  • the rows of grate bars each in one piece form so that they are a coherent grate plate form.
  • the method according to the invention can also be used in some To be modified.
  • a return line can also be provided through the grate bar the steam is drawn out of the cavity and about one Condenser supplied and in liquid form again in the Cooling water circuit is recycled while the recovered heat is used for other purposes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Furnace Details (AREA)
EP98810918A 1998-09-15 1998-09-15 Verfahren zur Kühlung eines Rostes für einen Feuerungsraum sowie Rost für einen Feuerungsraum Ceased EP0987494A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP98810918A EP0987494A1 (de) 1998-09-15 1998-09-15 Verfahren zur Kühlung eines Rostes für einen Feuerungsraum sowie Rost für einen Feuerungsraum
TW088114104A TW406171B (en) 1998-09-15 1999-08-18 Method of cooling a grate for a furnace and grate for a furnace
US09/391,402 US6213031B1 (en) 1998-09-15 1999-09-08 Method of cooling a grate for a furnace and grate for a furnace
NO994401A NO994401L (no) 1998-09-15 1999-09-10 Fremgangsmõte for kjøling av en rist for et fyringsrom og en rist for et fyringsrom
JP11258865A JP2000088231A (ja) 1998-09-15 1999-09-13 燃焼室用の格子を冷却する方法並びに燃焼室用の格子
KR1019990039307A KR20000023137A (ko) 1998-09-15 1999-09-14 노용 그레이트의 냉각방법 및 노용 그레이트

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98810918A EP0987494A1 (de) 1998-09-15 1998-09-15 Verfahren zur Kühlung eines Rostes für einen Feuerungsraum sowie Rost für einen Feuerungsraum

Publications (1)

Publication Number Publication Date
EP0987494A1 true EP0987494A1 (de) 2000-03-22

Family

ID=8236321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810918A Ceased EP0987494A1 (de) 1998-09-15 1998-09-15 Verfahren zur Kühlung eines Rostes für einen Feuerungsraum sowie Rost für einen Feuerungsraum

Country Status (6)

Country Link
US (1) US6213031B1 (no)
EP (1) EP0987494A1 (no)
JP (1) JP2000088231A (no)
KR (1) KR20000023137A (no)
NO (1) NO994401L (no)
TW (1) TW406171B (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2586418C2 (ru) * 2011-01-18 2016-06-10 Валмет Текнолоджиз, Инк. Колосниковая решетка котла и котел

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002181311A (ja) * 2000-12-11 2002-06-26 Ishikawajima Harima Heavy Ind Co Ltd ストーカー炉
US6405661B1 (en) * 2001-03-22 2002-06-18 New York State Electric & Gas Corporation Combustion enhancing air foil
US6981455B2 (en) 2002-03-08 2006-01-03 Lefcort Malcolm D Two-stage wet waste gasifier and burner
KR101586309B1 (ko) * 2008-12-30 2016-01-18 엘지전자 주식회사 드럼세탁기
CN112879932B (zh) * 2021-01-29 2022-10-11 青岛荏原环境设备有限公司 一种炉排冷却装置、炉排、焚烧炉及方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE335604A (no) *
FR690039A (fr) * 1930-02-15 1930-09-15 Dispositif de grille à circulation d'eau et de vapeur
EP0393970A2 (en) * 1989-04-20 1990-10-24 Davy Mckee (Stockton) Limited Cooling of hot bodies
EP0621449A1 (de) 1993-04-20 1994-10-26 Doikos Investments Ltd Verfahren zum Verbrennen von Kehricht auf einem Verbrennungsrost sowie Verbrennungsrost zur Ausübung des Verfahrens und Rostplatte zur Herstellung eines solchen Verbrennungsrostes
DE4409992A1 (de) 1994-03-23 1995-09-28 Skf Textilmasch Komponenten Einzelmotorischer Antrieb eines schaftlosen Spinnrotors einer Offenend-Spinnmaschine
EP0713056A1 (de) * 1994-11-17 1996-05-22 Von Roll Umwelttechnik AG Gekühlter Rostblock

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4876972A (en) * 1987-01-21 1989-10-31 Louis Mrklas Grate bar element for a sliding grate furnace for garbage incineration
DE4105330C1 (no) * 1991-02-18 1992-08-06 Noell - K + K Abfalltechnik Gmbh, 4040 Neuss, De
DE4400992C1 (de) 1994-01-14 1995-05-11 Noell Abfall & Energietech Roststab und Rost mit Kühleinrichtung
DE9417515U1 (de) * 1994-10-31 1996-02-29 Babcock Materials Handling Division GmbH, 21614 Buxtehude Schubrost für Klinkerkühler
CH689519A5 (de) * 1995-05-17 1999-05-31 Von Roll Umwelttechnik Ag Gekuehlter Rostblock.
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
NO312644B1 (no) * 1997-04-23 2002-06-10 Doikos Investments Ltd Vannkjölt trykkforbrenningsrist

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE335604A (no) *
FR690039A (fr) * 1930-02-15 1930-09-15 Dispositif de grille à circulation d'eau et de vapeur
EP0393970A2 (en) * 1989-04-20 1990-10-24 Davy Mckee (Stockton) Limited Cooling of hot bodies
EP0621449A1 (de) 1993-04-20 1994-10-26 Doikos Investments Ltd Verfahren zum Verbrennen von Kehricht auf einem Verbrennungsrost sowie Verbrennungsrost zur Ausübung des Verfahrens und Rostplatte zur Herstellung eines solchen Verbrennungsrostes
DE4409992A1 (de) 1994-03-23 1995-09-28 Skf Textilmasch Komponenten Einzelmotorischer Antrieb eines schaftlosen Spinnrotors einer Offenend-Spinnmaschine
EP0713056A1 (de) * 1994-11-17 1996-05-22 Von Roll Umwelttechnik AG Gekühlter Rostblock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2586418C2 (ru) * 2011-01-18 2016-06-10 Валмет Текнолоджиз, Инк. Колосниковая решетка котла и котел

Also Published As

Publication number Publication date
TW406171B (en) 2000-09-21
NO994401D0 (no) 1999-09-10
NO994401L (no) 2000-03-16
US6213031B1 (en) 2001-04-10
KR20000023137A (ko) 2000-04-25
JP2000088231A (ja) 2000-03-31

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