EP2242949B1 - Procédé de chargement par projection de chaufferies et chaufferie - Google Patents

Procédé de chargement par projection de chaufferies et chaufferie Download PDF

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Publication number
EP2242949B1
EP2242949B1 EP09711622.2A EP09711622A EP2242949B1 EP 2242949 B1 EP2242949 B1 EP 2242949B1 EP 09711622 A EP09711622 A EP 09711622A EP 2242949 B1 EP2242949 B1 EP 2242949B1
Authority
EP
European Patent Office
Prior art keywords
grate
fuel
firing
firing chamber
feeder
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.)
Active
Application number
EP09711622.2A
Other languages
German (de)
English (en)
Other versions
EP2242949A2 (fr
Inventor
Dietmar Baumann
Wolfgang Madlsperger
Willibald Weiss
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.)
Christof International Management GmbH
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Christof International Management GmbH
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Publication date
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Publication of EP2242949A2 publication Critical patent/EP2242949A2/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/16—Over-feed arrangements
    • F23K3/18—Spreader stokers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F23B40/02—Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed by scattering over the fuel-supporting surface

Definitions

  • the invention relates to a method for litter feed in furnaces according to the preamble of claim 1 and a furnace for carrying out the method according to the preamble of claim. 5
  • the invention can be used in furnaces with blower throw litter.
  • the solid, small-particle fuel is introduced into the furnace with the aid of the centrifugal wheel arranged in the throw feeder. By changing the speed of the blast wheel the throw distance can be adjusted.
  • Corresponding plants are approximately from the DE 4217070 A1 where coal is applied to a horizontal grid by means of litter feeding.
  • the throw feeder is mounted approximately vertically above the end of the grate in the end wall of the furnace.
  • the arrangement of the throwing feeder over the end of the grate has the disadvantage that fresh fuel also impinges on the grate near the end of the grate and can no longer burn completely before being discharged. As a result, the maximum permissible residual carbon content of the ash may not be complied with.
  • the GB 574,829 A shows a furnace in which a blast wheel is arranged in a lowered part of the firebox ceiling.
  • a charging device for furnaces which has a centrifugal wheel with a vertical axis of rotation.
  • the charging device is arranged outside the area of the firebox ceiling.
  • the object of the present invention is to make the known solution more compact and to improve burnout. This object is achieved by the features of claims 1 and 5, respectively.
  • the throw feeder is additionally arranged higher, at the same speed of the blower wheel, a greater throwing range can be achieved, or the speed of the thrower wheel can be reduced while the throwing distance remains the same.
  • the impeller is arranged horizontally, so the axis of rotation of the impeller is vertical.
  • the fuel is introduced from above in the region of the hub of the blast wheel in the housing of the throwing feeder and then with the help of the blades of the blast wheel horizontally outwards and - promoted through openings of the throw feeder - in the furnace.
  • the axis of rotation of the blast wheel can also be tilted against the vertical.
  • the invention provides that the upper part of the end wall of the firebox is offset by a lowered part of the firebox ceiling inwards into the firebox and the fuel is introduced at the upper end of the upper end wall.
  • the firebox cover closes off the firebox at the top and has an opening for the flue gas to be exhausted.
  • the burn-out zone is between 15 and 40%, in particular between 20 and 40%, of the length of the grate.
  • the method according to the invention can be used in particular for a feed grate. Unlike a traveling grate, where the grate itself moves in the conveying direction, e.g. the bars of rust in place and are only moved back and forth.
  • a combustion plant according to the invention is specified in claim 5.
  • This comprises at least one furnace, a grate arranged therein and a throw feeder with which fuel can be applied against the conveying direction of the grate on the grate.
  • the firing plant is characterized in that the fuel can be introduced by means of the litter feeder directly under the firebox ceiling, in the conveying direction of the rust seen before the end of the grate, so that when operating the litter feeder at the grate between the litter feeder and the end of the grate a burn-out zone is formed can not be charged with fresh fuel.
  • the burn-out zone is between 15 and 40%, in particular between 20 and 40%, the length of the grate.
  • the upper part of the end wall of the firebox is offset inwardly into the firebox by a lowered part of the firebox ceiling.
  • an opening for introducing the fuel is provided at the upper end of the upper end wall.
  • the figure shows schematically the combustion chamber 1 of a furnace in which a horizontal grate 2 is arranged, which promotes from left to right.
  • This feed grate consists of individual elements with bars aligned in the conveying direction (in this example, the bars have a length of 500mm), with only every second element moved back and forth.
  • the fuel 3 is fed from above a throw feeders 4 and conveyed by means of this in the combustion chamber 1.
  • the throw feeder 4 has a horizontally arranged impeller, so the axis of rotation of the impeller is vertical.
  • the fuel 3 is introduced from above in the region of the hub of the centrifugal wheel in the throw feeder 4 and then with the help of the blades of the centrifugal wheel horizontally outward and - promoted through openings of the throw feeder - in the furnace.
  • the axis of rotation of the blast wheel can also be tilted against the vertical.
  • the throw feeder 4 itself is arranged outside of the combustion chamber 1, the openings of the throwing feeder 4 open into an opening 6 of the combustion chamber 1, in such a way that the fuel can be deployed as close as possible below the furnace ceiling 5.
  • the falling curves of the fuel delivered into the combustion chamber are represented by curves 7.
  • the firebox ceiling 5 is lowered from the burn-up end of the firebox 1 to the opening 6 for the fuel, so that over this lowered part 5a of the firebox ceiling 5 the throw feeder 4 has room.
  • the opening 6 of the firebox is.
  • the lower end wall 13 of the combustion chamber 1 remains unchanged.
  • the end wall 8, 13 of the combustion chamber 1 are arranged vertically in this example.
  • the end wall 8, 13 could also be arranged obliquely in whole or in part, wherein the vertical component should predominate. As soon as the horizontal component predominates, ie the wall is inclined more than 45 ° to the vertical, this wall must already be assigned to the firebox ceiling 5.
  • the firebox cover 5 closes the combustion chamber 1 at the top and has an opening for the withdrawal of the flue gas 9.
  • a substantial part of the firebox ceiling is arranged horizontally in this example, this part here covers about half the length of the grate 5.
  • the firebox ceiling can also have any other shape, which depends on the particular application, in particular depends on the fuel. In other applications, for example, the opening for the withdrawal of the flue gas 9 may be larger or smaller.
  • the burn-out zone 10 Due to the fact that the opening 6 for the fuel from the throw feeder 4 is displaced into the furnace opposite to the conveying direction of the grate 5, the burn-out zone 10, into which no fresh fuel 7 can pass directly from the throw feeder 4, is formed on the grate 5.
  • the burn-out zone 10 therefore extends at least from vertically below the opening 6, that is, the upper end wall 8, to the discharge-side end of the grate 5. In this embodiment, the burn-out zone is about one-sixth the length of the grate.
  • the fresh fuel 7 from the throw feeder 4 can only impinge in the remaining area 11 of the grate 5.
  • the combustion therefore begins in this region 11 and continues in the burn-out zone 10, until finally the ash 12 remaining at the end of the grate 5 is conveyed out of the combustion chamber 1 without afterburning.
  • a traveling grate can also be used a traveling grate.
  • the rust does not have to be horizontal, but it can also be arranged slightly inclined, inclined by about 7 ° to the horizontal.
  • the grate can also be designed in stages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Solid-Fuel Combustion (AREA)
  • Incineration Of Waste (AREA)
  • Gasification And Melting Of Waste (AREA)

Claims (8)

  1. Procédé de chargement par projection dans des installations de chauffage selon lequel un combustible (3, 7) est déposé au moyen d'un chargeur par projection (4) sur une grille (2) montée dans le foyer (1), la direction de projection étant opposée à la direction de déplacement de la grille (2) et la partie supérieure d'une paroi frontale du foyer (1) étant décalée vers l'intérieur dans le foyer (1) par une partie abaissée (5a) du plafond (5) du foyer de sorte que dans sa direction de déplacement le combustible (3, 7) soit introduit, à l'avant de l'extrémité de la grille (2) pour que sur celle-ci soit créée, entre le chargeur par projection (4) et son extrémité, une zone éteinte (10) qui n'est pas alimentée en combustible frais (3, 7),
    caractérisé en ce que
    le combustible (3, 7) est directement introduit au-dessous du plafond (5) du foyer à l'extrémité supérieure de la paroi frontale (8) par l'intermédiaire d'un chargeur par projection (4) au moyen d'une roue centrifuge ayant un axe de rotation au moins essentiellement vertical.
  2. Procédé conforme à la revendication 1,
    caractérisé en ce que
    la zone éteinte (10) occupe entre 15 et 40 % et en particulier entre 20 et 40 % de la longueur de la grille (2).
  3. Procédé conforme à l'une des revendications 1 et 2,
    caractérisé en ce que
    les résidus de combustion (12) sont soutirés du foyer (1) à l'extrémité de la grille (2).
  4. Procédé conforme à l'une des revendications 1 à 3,
    caractérisé en ce que
    la grille (2) est une grille mobile d'avancement.
  5. Installation de chauffage permettant la mise en oeuvre d'un procédé conforme à l'une des revendications 1 à 4, comprenant au moins un foyer (1) dans lequel est montée une grille (2) ainsi qu'un chargeur par projection (4) à l'aide duquel du combustible (3, 7) peut être déposé sur cette grille (2) en direction opposée à sa direction de déplacement, et, ce, à l'avant de l'extrémité de la grille (2), dans la direction de déplacement de celle-ci, de sorte que, lors du fonctionnement du chargeur par projection (4), soit créée, sur la grille (2), entre le chargeur par projection (4) et l'extrémité de cette grille (2) une zone éteinte (10) qui ne peut pas être alimentée en combustible frais (3, 7), la partie supérieure d'une paroi frontale (8) du foyer (1) étant décalée vers le bas dans le foyer (1) par une partie abaissée (5a) du plafond (5) de ce foyer, et, à l'extrémité supérieure de la paroi frontale (8) étant prévue une ouverture (6) d'introduction du combustible (3, 7),
    caractérisée en ce que
    le chargeur par projection (4) comporte une turbine ayant un axe de rotation au moins essentiellement vertical, le chargeur par projection étant monté de sorte que le combustible soit introduit au moyen du chargeur par projection immédiatement au-dessous du plafond (5) du foyer.
  6. Installation de chauffage conforme à la revendication 5,
    caractérisée en ce que
    la zone éteinte (10) occupe entre 15 et 40 % et en particulier entre 20 et 40 % de la longueur de la grille (2).
  7. Installation de chauffage conforme à l'une des revendications 5 et 6, caractérisée en ce qu'
    à l'extrémité de la grille (2) il est prévu une évacuation à l'aide de laquelle les résidus de combustion (12) peuvent être soutirés du foyer (1).
  8. Installation de chauffage conforme à l'une des revendications 5 à 7, caractérisée en ce que
    la grille (2) est une grille mobile d'avancement.
EP09711622.2A 2008-02-21 2009-02-12 Procédé de chargement par projection de chaufferies et chaufferie Active EP2242949B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008010235A DE102008010235B4 (de) 2008-02-21 2008-02-21 Verfahren zur Wurfbeschickung bei Feuerungsanlagen und Feuerungsanlage
PCT/EP2009/051623 WO2009103655A2 (fr) 2008-02-21 2009-02-12 Procédé de chargement par projection de chaufferies et chaufferie

Publications (2)

Publication Number Publication Date
EP2242949A2 EP2242949A2 (fr) 2010-10-27
EP2242949B1 true EP2242949B1 (fr) 2018-11-14

Family

ID=40952804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09711622.2A Active EP2242949B1 (fr) 2008-02-21 2009-02-12 Procédé de chargement par projection de chaufferies et chaufferie

Country Status (6)

Country Link
US (1) US20100323310A1 (fr)
EP (1) EP2242949B1 (fr)
CN (1) CN101946125B (fr)
CA (1) CA2716179A1 (fr)
DE (1) DE102008010235B4 (fr)
WO (1) WO2009103655A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9835326B2 (en) * 2014-01-27 2017-12-05 Valvexport, Inc. Automated biomass distribution system
US10125985B2 (en) * 2014-01-27 2018-11-13 Valvexport, Inc. Automated biomass distribution system
CN106382637A (zh) * 2016-11-19 2017-02-08 无锡大功机械制造有限公司 一种垃圾焚烧炉的进料装置
US20180238543A1 (en) * 2017-02-23 2018-08-23 Kappes, Cassiday & Associates Sand bed downdraft furnace and activated carbon scrubber

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE686716C (de) * 1937-11-19 1940-01-15 Alois Kulis Beschickungsvorrichtung fuer Feuerungen
GB574829A (en) * 1944-02-18 1946-01-22 Danks Of Netherton Ltd Improvements in grates for the furnaces of boilers and the like
JPS6199019A (ja) * 1984-10-19 1986-05-17 Asahi Boiraa Kogyo Kk 固形燃料拡散投入装置

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511935A (en) * 1950-06-20 Traveling grate stoker including
US2110452A (en) * 1936-05-19 1938-03-08 Riley Stoker Corp Furnace
AT155349B (de) * 1937-08-24 1938-12-27 Ungarische Radiatoren Fabriks Mechanische Feuerungseinrichtung.
GB523265A (en) * 1938-12-29 1940-07-10 Ungarische Radiatoren Fabriks Improvements in and relating to charging devices for mechanical furnaces comprising a throwing shovel
US2493960A (en) * 1945-12-11 1950-01-10 Charles S Gladden Method and apparatus for burning fine solids
US2615406A (en) * 1949-11-12 1952-10-28 Westinghouse Electric Corp Traveling grate stoker
US2654331A (en) * 1950-05-26 1953-10-06 Detroit Stoker Co Stoker apparatus
US2794406A (en) * 1952-09-24 1957-06-04 Detroit Stoker Co Stoker apparatus
US3311090A (en) * 1965-11-26 1967-03-28 Tennessee River Pulp & Paper C Boiler apparatus for complete combustion of fuel
JPS577226A (en) * 1980-06-17 1982-01-14 Babcock Hitachi Kk Apparatus for decomposing malodorant gas and recovering waste heat
US4362269A (en) * 1981-03-12 1982-12-07 Measurex Corporation Control system for a boiler and method therefor
JPS5960104A (ja) * 1982-09-28 1984-04-06 Mitsubishi Heavy Ind Ltd 石炭燃焼炉
US4528917A (en) * 1983-07-05 1985-07-16 Northwest Iron Fireman, Inc. Solid fuel burner
US4485747A (en) * 1983-07-15 1984-12-04 The United States Of America As Represented By The Environmental Protection Agency Reducing pollutant emissions by fines removal
US4592289A (en) * 1983-10-18 1986-06-03 The United States Of America As Represented By The Administrator Of The Environmental Protection Agency Reducing pollutant emissions from a spreader-stoker-fired furnace by stoichiometric control
FR2563320B1 (fr) * 1984-04-24 1989-03-24 Stein Industrie Chaudiere pour la combustion de charbons maigres
JPH0639963B2 (ja) * 1991-05-22 1994-05-25 東洋ゴム工業株式会社 ボイラー等の燃焼室および石炭とゴム片との混焼方法
AT412500B (de) * 2002-10-29 2005-03-25 Wilde Andreas Ing Verfahren zum verbrennen von kleinstückeligem brennstoff
US7017500B2 (en) * 2004-03-30 2006-03-28 International Paper Company Monitoring of fuel on a grate fired boiler
AT502343B1 (de) * 2005-08-24 2007-12-15 Eisenzopf Georg Heizkessel für körnige brennstoffe
CN2864390Y (zh) * 2005-11-18 2007-01-31 朴熙英 多功能锅炉助燃器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE686716C (de) * 1937-11-19 1940-01-15 Alois Kulis Beschickungsvorrichtung fuer Feuerungen
GB574829A (en) * 1944-02-18 1946-01-22 Danks Of Netherton Ltd Improvements in grates for the furnaces of boilers and the like
JPS6199019A (ja) * 1984-10-19 1986-05-17 Asahi Boiraa Kogyo Kk 固形燃料拡散投入装置

Also Published As

Publication number Publication date
CN101946125A (zh) 2011-01-12
EP2242949A2 (fr) 2010-10-27
WO2009103655A2 (fr) 2009-08-27
US20100323310A1 (en) 2010-12-23
WO2009103655A3 (fr) 2010-02-25
DE102008010235A1 (de) 2009-09-17
DE102008010235B4 (de) 2010-07-01
CA2716179A1 (fr) 2009-08-27
CN101946125B (zh) 2012-12-05

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