EP1983262A2 - Grille - Google Patents

Grille Download PDF

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Publication number
EP1983262A2
EP1983262A2 EP08397002A EP08397002A EP1983262A2 EP 1983262 A2 EP1983262 A2 EP 1983262A2 EP 08397002 A EP08397002 A EP 08397002A EP 08397002 A EP08397002 A EP 08397002A EP 1983262 A2 EP1983262 A2 EP 1983262A2
Authority
EP
European Patent Office
Prior art keywords
grate
plates
apertures
circle
periphery
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.)
Granted
Application number
EP08397002A
Other languages
German (de)
English (en)
Other versions
EP1983262A3 (fr
EP1983262B1 (fr
Inventor
Pauli Pieti
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1983262A2 publication Critical patent/EP1983262A2/fr
Publication of EP1983262A3 publication Critical patent/EP1983262A3/fr
Application granted granted Critical
Publication of EP1983262B1 publication Critical patent/EP1983262B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H5/00—Double 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
    • F23H1/06—Grates with solid bars having bars at different levels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/16—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support
    • F23B1/24—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support using rotating grate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
    • F23G7/105—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses of wood waste
    • 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
    • F23H1/00—Grates with solid bars
    • F23H1/04—Grates with solid bars having a variable burning surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H17/00—Details of grates
    • 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

  • This invention relates to a grate and more precisely an adjustable grate for a burning device.
  • a conventional furnace bottom structure may be simply, for example, a bricklaid surface. This is used, for example, in baking ovens. In such a case, no grate is applied at all.
  • Another typical furnace bottom structure consists of a grate which is normally made of cast iron in the shape of some kind of a grid and which is placed on the bottom of a burning device, such as the furnace of a sauna stove.
  • An ash box is normally provided underneath the grate. The draught and the burning of wood are adjusted by opening the ash box slightly or possibly by adjusting air holes in the furnace door.
  • the grate is intended to be used in a burning device which may be, for example, a burning device according to EP 1402217 or EP 1427963 .
  • the grate is intended to be used particularly in such a burning device which is intended for the burning of both chopped firewood and wood pellets.
  • a burning device may be, for example, a heat storing fireplace with a special combustion space where it is possible to burn both pellets and chopped wood.
  • the combustion space consists of a vessel whose side wall is perforated for the passage of air.
  • the grate is on the bottom of the vessel in such a way that the ash space of the fireplace remains under the grate; in other words, the ashes can fall to the ash space through the openings of the grate.
  • the grate consists of two perforated plates or grate elements which are placed on top of each other and which can be rotated in relation to each other.
  • the plates are circular, or plates of another shape are chamfered in such a way that rotating is possible.
  • the plates are also installed concentrically, wherein they are rotatable in relation to each other around the centres of the plates.
  • one of the plates is stationary and the other plate is rotated with respect to the stationary plate.
  • By rotating at least one of the plates with respect to the other plate it is possible to place the plates in such a way with respect to each other that the apertures in each plate can be used to adjust the size of the openings formed through both of the plates in a suitable way.
  • the apertures in each plate can be aligned in such a way that the size of the openings becomes larger, or the apertures are not quite aligned, in which case the size of the openings becomes smaller.
  • the apertures in at least one of the plates are arranged on the periphery of at least one circle.
  • the apertures arranged on the periphery of the circle are elongated so that they are longer in the direction of the periphery of the circle than in the radial direction of the circle.
  • the elongated shape of the apertures and the fact that the longitudinal direction of the aperture is substantially parallel to the periphery are important.
  • both of the plates are similar with the exception that the upper plate is equipped with a central hole for a so-called combustion tube or fire tube, whereas the lower plate is perforated in said location, as will be shown in the drawings below. It is also possible that the lower plate is not perforated.
  • This embodiment is particularly advantageous because of its resistance in practice, since the grate is not warped by the effect of heat and its usable life is thus long.
  • the combustion tube is a tube extending centrally upwards in the combustion space and having open ends and a perforated side wall.
  • the combustion tube is used together with holes in the wall of the combustion space to generate, when pellets are burnt, a flow of combustion gases into the combustion tube, in which the combustion gases are burnt.
  • the combustion tube can also be used for turning the upper plate of the grate, for adjusting the openings of the grate.
  • the combustion tube is normally not used when chopped wood is burnt.
  • the desired function can also be achieved, for example by equipping the upper plate with elongated apertures arranged on the periphery of a circle, but the lower plate with apertures whose longitudinal direction is in the radial direction of the circle; in other words, the single apertures of the lower plate can form openings extending through the plates with several apertures of the upper plate.
  • the grate may also comprise firing tubes for conveying a material for facilitating the ignition and auxiliary air ducts for conveying air.
  • firing tubes for conveying a material for facilitating the ignition
  • auxiliary air ducts for conveying air.
  • FIG. 1 shows a grate according to the invention seen in a slanted view in the "burning position"
  • Fig. 2 shows the grate according to the invention in the ash removal position.
  • grates shown in the figures are depicted as plates with a circular form, but in view of the function of the invention it is insignificant whether the plates have a circular or different shape. What is essential, however, is that the mutual position of the plates can be changed by rotating with respect to a given point.
  • the grate 1 consists of two substantially plate-like elements 2, 3 placed on top of each other and connected to each other in a suitable way to form a compact unit.
  • the grate is mounted or supported to the burning device in any way known as such, normally at the lower grate element.
  • a suitable space is left for ash underneath the grate.
  • the upper plate is provided with an octagonal central hole. This opening is intended to accommodate a "fire tube” according to an embodiment in use, for rotating the upper grate element.
  • the central part of the lower grate element 2 is equipped with perforations 5 to allow the flow of air from below into the combustion space.
  • the lower grate element is also equipped with a central hole 9, through which it is also possible, in some embodiments, to introduce air into the combustion space. If both of the grate elements 2 and 3 are equipped with corresponding holes, a pin-like or sleeve-like shaft element can be placed through the holes to keep the elements 2 and 3 together. On the other hand, the hole 9 can also be covered, if necessary.
  • tubular parts marked with the reference numeral 4 are intended for conducting air from below into the combustion space.
  • the plate 2 is equipped with a number of circumferentially arranged apertures 6 which are elongated in this embodiment.
  • the upper grate element 3 is, in principle, plate-like and equipped with apertures corresponding to the apertures 6 of the lower grate element 2.
  • the apertures are on top of each other, wherein the same reference numeral 6 indicates the apertures of both grate elements 2 and 3.
  • the apertures are substantially identical in both of the grate elements.
  • the apertures are open as much as possible. This position could be called the ash removal position, because the removal of the ash produced by burning is then easy and possible through the apertures 6.
  • the upper grate element 3 can be turned to a fixed angle in relation to the grate element 2 in a rotating manner. As can be easily seen, by turning it is possible to make the size of the apertures 6 larger and smaller from the small size of Fig. 1 to the large size of Fig. 2 in a stepless manner.
  • the pin-like parts indicated with the reference numeral 7 are hollow, and via them it is possible to facilitate the ignition of the material to be burnt, because any material to facilitate ignition can be introduced via the tubes 7 into the combustion space which is placed on top of the grate, as is obvious.
  • the tubes 7 can conduct air heated outside to facilitate the ignition.
  • tubular parts 7 Another function of the tubular parts 7 is to facilitate the sticking together of the grate elements 2 and 3.
  • the grate elements 2 and 3 are primarily kept together, for example, by means of a pin inserted in the central hole in the grate or by providing either one of the grate elements with a collar or the like that is supported by parts in the other grate element.
  • the parts 7 are also used as stops for the movement between the grates.
  • the movement between the grate elements 2 and 3 is limited to a suitable range, for example, by means of a stop pin indicated with the reference numeral 8.
  • the pin 8 is fixed to the upper grate element 3 and it moves in a slot in the lower grate element. It is obvious that there are also many other ways of stopping which are known in abundance from a variety of technical fields. Because the function of the movement is to open and close the apertures 6, the required movement is relatively small, maybe in the order of about 15 degrees in the average, wherein the part 8 is suitable for this purpose.
  • the upper grate element 3 can be equipped with a suitable protrusion not indicated herein. If the structure according to the invention is used in connection with a generally cylindrical burning device, the protrusion could be a kind of a handle which is visible at the side and by means of which the burning process can be easily adjusted by changing the size of the openings 6.
  • the material for producing the grate according to the invention is particularly a plate made of metal, such as cast iron.
  • the material thickness and the size of the openings and the other details are always selected according to the use.
  • the adjustment of the combustion is efficient when the grate according to the invention is used.
  • the adjustment of the air-introducing aperture means pure combustion and also efficient combustion.
  • the grate according to the invention can be used in any burning device, but it can also be applied, for example, in connection with a so-called combustion cylinder.
  • a combustion cylinder is disclosed in patent EP 1427963 .
  • the grate according to the invention is used in the combustion cylinder according to the patent EP 1427963 , no hole for a fire tube is needed in the upper grate element.
  • the hole in the centre of the grate or smaller holes around the same, are used in some applications but not used in other applications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Incineration Of Waste (AREA)
  • Solid-Fuel Combustion (AREA)
EP08397002.0A 2007-04-05 2008-04-03 Grille Réglable pour un Dispositif à Combustion Not-in-force EP1983262B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20070265A FI123850B (fi) 2007-04-05 2007-04-05 Rosti

Publications (3)

Publication Number Publication Date
EP1983262A2 true EP1983262A2 (fr) 2008-10-22
EP1983262A3 EP1983262A3 (fr) 2008-12-24
EP1983262B1 EP1983262B1 (fr) 2014-01-08

Family

ID=38009807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08397002.0A Not-in-force EP1983262B1 (fr) 2007-04-05 2008-04-03 Grille Réglable pour un Dispositif à Combustion

Country Status (2)

Country Link
EP (1) EP1983262B1 (fr)
FI (1) FI123850B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105091003A (zh) * 2015-07-27 2015-11-25 佛山市南海区松岗华然五金厂 一种生物质燃烧器的活动翻板快速清灰结构
EP2639288A4 (fr) * 2010-11-08 2016-01-06 Ze Energy Inc Four et système de gazéification et dispositif et système de reformage
GB2534916A (en) * 2015-02-05 2016-08-10 Atkins John Improved grate assembly for a gasifier
WO2016180793A1 (fr) * 2015-05-13 2016-11-17 Autark Energy Gmbh Grille rotative destinée à un gazéificateur à lit fixe permettant de générer un produit gazeux à partir de substances de départ carbonées
CN113587081A (zh) * 2021-07-15 2021-11-02 宁波久丰热电有限公司 一种燃煤锅炉燃烧系统
EP4227580A1 (fr) * 2022-02-09 2023-08-16 Pauli Pieti Foyer prévu pour des combustibles solides avec dispositif multi-combustible disposé dans son lieu de combustion

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2081436A (en) 1980-08-06 1982-02-17 Pennington Richards Cyril Mont Solid fuel burning stoves
EP1402217A1 (fr) 2001-05-18 2004-03-31 Pauli Pieti Bruleur pour combustible solide
EP1427963A1 (fr) 2001-08-22 2004-06-16 Pieti, Pauli Dispositif de combustion

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR374666A (fr) * 1907-02-15 1907-06-20 Uise, Colin Et Cie Nouveau mode de construction des calorifères à feu continu ou à combustion lente
DE936230C (de) * 1951-11-13 1955-12-07 Carl Alfred Simon Rost mit zwei uebereinander liegenden Rostplatten
EP0295756A3 (fr) * 1987-06-18 1989-05-31 Liets Agrarische Technieken B.V. Appareil de chauffage
EP0304514B1 (fr) * 1987-08-28 1991-11-27 V.F.M. Verkoop en Fabrikatie van Metaalprodukten Naamloze Vennootschap Grille pour foyers, poêles et chaudières de chauffage central

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2081436A (en) 1980-08-06 1982-02-17 Pennington Richards Cyril Mont Solid fuel burning stoves
EP1402217A1 (fr) 2001-05-18 2004-03-31 Pauli Pieti Bruleur pour combustible solide
EP1427963A1 (fr) 2001-08-22 2004-06-16 Pieti, Pauli Dispositif de combustion

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2639288A4 (fr) * 2010-11-08 2016-01-06 Ze Energy Inc Four et système de gazéification et dispositif et système de reformage
US9315746B2 (en) 2010-11-08 2016-04-19 Ze Energy Inc. Gasification furnace, gasification system, reformer and reforming system
US10195582B2 (en) 2010-11-08 2019-02-05 Ze Energy Inc. Gasification furnace, gasification system, reformer and reforming system
GB2534916A (en) * 2015-02-05 2016-08-10 Atkins John Improved grate assembly for a gasifier
WO2016180793A1 (fr) * 2015-05-13 2016-11-17 Autark Energy Gmbh Grille rotative destinée à un gazéificateur à lit fixe permettant de générer un produit gazeux à partir de substances de départ carbonées
CN105091003A (zh) * 2015-07-27 2015-11-25 佛山市南海区松岗华然五金厂 一种生物质燃烧器的活动翻板快速清灰结构
CN113587081A (zh) * 2021-07-15 2021-11-02 宁波久丰热电有限公司 一种燃煤锅炉燃烧系统
CN113587081B (zh) * 2021-07-15 2024-02-09 宁波久丰热电有限公司 一种燃煤锅炉燃烧系统
EP4227580A1 (fr) * 2022-02-09 2023-08-16 Pauli Pieti Foyer prévu pour des combustibles solides avec dispositif multi-combustible disposé dans son lieu de combustion

Also Published As

Publication number Publication date
FI20070265A (fi) 2008-10-06
EP1983262A3 (fr) 2008-12-24
EP1983262B1 (fr) 2014-01-08
FI123850B (fi) 2013-11-15
FI20070265A0 (fi) 2007-04-05

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