[go: up one dir, main page]

WO2002006744A1 - Four a rouleaux - Google Patents

Four a rouleaux Download PDF

Info

Publication number
WO2002006744A1
WO2002006744A1 PCT/EP2000/006859 EP0006859W WO0206744A1 WO 2002006744 A1 WO2002006744 A1 WO 2002006744A1 EP 0006859 W EP0006859 W EP 0006859W WO 0206744 A1 WO0206744 A1 WO 0206744A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
rollers
kiln
plane
heat
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
PCT/EP2000/006859
Other languages
English (en)
Inventor
Franco Stefani
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.)
Ronflette SA
Original Assignee
Ronflette SA
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 Ronflette SA filed Critical Ronflette SA
Priority to AU2000265649A priority Critical patent/AU2000265649A1/en
Priority to PCT/EP2000/006859 priority patent/WO2002006744A1/fr
Publication of WO2002006744A1 publication Critical patent/WO2002006744A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0033—Linings or walls comprising heat shields, e.g. heat shields
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/021—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces having two or more parallel tracks
    • F27B9/025—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces having two or more parallel tracks having two or more superimposed tracks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/062—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated electrically heated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor
    • F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

Definitions

  • the invention relates to a roller ldln comprising means for applying heat and a treatment chamber internally of which a roller plane is located, on which roller plane objects under treatment are placed and transferred from an entrance to an exit thereof.
  • the invention is usefully applied in firing ceramic materials and/or manufactures.
  • roller kilns are used in various industrial fields, such as the glass, metallurgical and ceramics industries, and are constituted by a rectangular-section heating chamber in which, above and below the roller plane on which the objects to be treated are transiting, heating panels are provided; electrical resistance elements are either sunk into or located on these heating panels. Good heat radiation is thus obtained inasmuch as the vault and the bottom of the chamber are in close proximity to the products on the rollers.
  • the technique does, however, present some drawbacks. Often it is necessary to protect (using a screen) the bottom heating panels, as fall of powders and/or flakes, possibly caused by friction of the products as they move along the rollers, can cause damage to the elements. Protecting the panels leads to a constructional complication, but can also determine a reduction in thermal efficiency of the kiln, both in terms of speed of response and in terms of overall performance.
  • the vault panels cannot be positioned very close to the material transiting on the rollers because there is always the risk that, in case of accidents inside the kiln, the material will pile up on the rollers and touch the panels, damaging them.
  • Safety distances are usually around 10-12 cm. and are the cause of a drop in heat- exchange performance between the panel and the materials being fired; they also perforce increase the volume of the firing chamber more than would be necessary for optimum functioning.
  • the aim of the present invention is to obviate the drawbacks and limitations in the prior art by providing an electric-powered roller kiln which is highly efficient while at the same time being very easy to realise.
  • An advantage of the invention is that very much higher concentrations of power can be reached, as the heating and rotating rollers have diameters of between 42 and 45 mm. and are arranged at distances from each other which might be 58, 60 or 62 mm.
  • a still turther advantage is that the temperature in the chamber can be better controlled, as each single roller can be heat-adjusted, so that effectively differentiated sets of temperatures can be obtained every 58, 60 or 62 mm.
  • a further advantage is that the heating elements can be easily substituted without having to shut down the whole kiln, as each roller can be removed and substituted during normal kiln operation. This does away once and for all with the need for complicated constructional solutions for access to inside the kiln.
  • a final and not negligible advantage is the maximisation of kiln heating performance; as there is no need to create room to house the heating panels, it becomes possible to dimension the firing chamber, both in terms of volume and in terms of vault, bottom and wall geometry, so as to have maximum energetic performance and minimum heat waste.
  • figure 1 shows a schematic transversal section in vertical elevation
  • figure 2 is a schematic section made according to line II-II of figure 1
  • figure 3 is the same view as figure 1 but of a further embodiment of the invention.
  • 1 denotes the treatment chamber of a continuous roller kiln 10, which can preferably be used for firing ceramic slabs or tiles 6.
  • a roller plane 2 is provided inside the chamber 1, on which the ceramic slabs or tiles 6 are placed to be transferred.
  • Heat is generated by at least a part of the rollers 3 of the roller plane 2, which are hollow and internally exhibit special means for producing heat energy.
  • the means for producing heat energy preferably comprise electrical resistances 4 arranged longitudinally so as to create a predetermined distribution of heat energy along the axis of each single roller 3.
  • the electrical resistances 4 which can be made of spirals of high-resistance conductive material, are arranged longitudinally so as to create uniform distribution of heat energy along the axis of each roller 3, and precisely over a predetermined portion of each roller 3.
  • the electrical resistances 4 are connected to the electrical source by rotating contacts 5 situated at an end of each single roller 3 - the other ends of the rollers 3 being rotated by a conventional mechanism.
  • the efficiency of the kiln is guaranteed by the fact that at least a part of the internal surfaces of the treatment chamber 1 above the roller plane 2 are reflective, i.e. able to reflect back the majority of the energy emitted by radiation.
  • two parallel roller planes 2 are provided, one located above the other, having the task of firing a considerably thick tile or slab. The aim is to achieve a homogeneous and symmetrical heating of the objects under treatment, i.e the ceramic products transiting on the lower roller plane 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)

Abstract

Le four à rouleaux comprend des systèmes de réchauffement et une chambre de traitement (1), à l'intérieur de laquelle un plan à rouleaux (2) sert de support et de surface de transfert d'objets depuis une entrée vers une sortie. Au moins une partie des systèmes de réchauffement est constituée par au moins plusieurs rouleaux du plan à rouleaux.
PCT/EP2000/006859 2000-07-13 2000-07-13 Four a rouleaux Ceased WO2002006744A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2000265649A AU2000265649A1 (en) 2000-07-13 2000-07-13 A roller kiln
PCT/EP2000/006859 WO2002006744A1 (fr) 2000-07-13 2000-07-13 Four a rouleaux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2000/006859 WO2002006744A1 (fr) 2000-07-13 2000-07-13 Four a rouleaux

Publications (1)

Publication Number Publication Date
WO2002006744A1 true WO2002006744A1 (fr) 2002-01-24

Family

ID=8164029

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/006859 Ceased WO2002006744A1 (fr) 2000-07-13 2000-07-13 Four a rouleaux

Country Status (2)

Country Link
AU (1) AU2000265649A1 (fr)
WO (1) WO2002006744A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8671507B2 (en) 2002-01-03 2014-03-18 Irobot Corporation Autonomous floor-cleaning robot
US10045676B2 (en) 2004-06-24 2018-08-14 Irobot Corporation Remote control scheduler and method for autonomous robotic device
US11278173B2 (en) 2002-01-03 2022-03-22 Irobot Corporation Autonomous floor-cleaning robot

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB619457A (en) * 1946-12-11 1949-03-09 Timsons Ltd Improvements in or relating to machines or apparatus for heat treating sheet material
GB925791A (en) * 1958-12-05 1963-05-08 Kurashiki Rayon Kk Hollow drying roller
DE2115399A1 (en) * 1970-06-26 1972-03-09 Koho Es Gepipari Miniszterium Heated rolls - for roller conveyor heat treatment furnaces
GB2008730A (en) * 1977-11-19 1979-06-06 Lingl Anlagenbau Improvements in or Relating to a Mounting System for Use in Mounting a Conveyor Roller in a Roller Tunnel Kiln
US4629867A (en) * 1984-03-29 1986-12-16 Lenzing Aktiengesellschaft Heated rotatable roll arrangement
FR2630533A1 (fr) * 1988-04-25 1989-10-27 Clecim Sa Enceinte thermique
US5611394A (en) * 1990-11-27 1997-03-18 Mitsubishi Jukogyo Kabushiki Kaisha Roll charged with heat transfer medium

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB619457A (en) * 1946-12-11 1949-03-09 Timsons Ltd Improvements in or relating to machines or apparatus for heat treating sheet material
GB925791A (en) * 1958-12-05 1963-05-08 Kurashiki Rayon Kk Hollow drying roller
DE2115399A1 (en) * 1970-06-26 1972-03-09 Koho Es Gepipari Miniszterium Heated rolls - for roller conveyor heat treatment furnaces
GB2008730A (en) * 1977-11-19 1979-06-06 Lingl Anlagenbau Improvements in or Relating to a Mounting System for Use in Mounting a Conveyor Roller in a Roller Tunnel Kiln
US4629867A (en) * 1984-03-29 1986-12-16 Lenzing Aktiengesellschaft Heated rotatable roll arrangement
FR2630533A1 (fr) * 1988-04-25 1989-10-27 Clecim Sa Enceinte thermique
US5611394A (en) * 1990-11-27 1997-03-18 Mitsubishi Jukogyo Kabushiki Kaisha Roll charged with heat transfer medium

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10420447B2 (en) 2001-01-24 2019-09-24 Irobot Corporation Autonomous floor-cleaning robot
US10433692B2 (en) 2001-01-24 2019-10-08 Irobot Corporation Autonomous floor-cleaning robot
US10517454B2 (en) 2001-01-24 2019-12-31 Irobot Corporation Autonomous floor-cleaning robot
US8671507B2 (en) 2002-01-03 2014-03-18 Irobot Corporation Autonomous floor-cleaning robot
US8763199B2 (en) 2002-01-03 2014-07-01 Irobot Corporation Autonomous floor-cleaning robot
US11278173B2 (en) 2002-01-03 2022-03-22 Irobot Corporation Autonomous floor-cleaning robot
US10045676B2 (en) 2004-06-24 2018-08-14 Irobot Corporation Remote control scheduler and method for autonomous robotic device
US10893787B2 (en) 2004-06-24 2021-01-19 Irobot Corporation Remote control scheduler and method for autonomous robotic device

Also Published As

Publication number Publication date
AU2000265649A1 (en) 2002-01-30

Similar Documents

Publication Publication Date Title
US6172346B1 (en) Method of processing ceramic materials and a microwave furnace therefore
KR101375570B1 (ko) 복사전열 히터
CN1307121C (zh) 利用电磁加工陶瓷的方法
KR20160033085A (ko) 연속 소성로
WO2002006744A1 (fr) Four a rouleaux
US20020008334A1 (en) Method for controlling the firing of ceramics
US3314666A (en) Fast fire tunnel kiln
KR100440667B1 (ko) 기판의 열처리 방법 및 그에 사용하는 연속식 열처리로
JPS6428484A (en) Radiation wall for heat exchanger
CN1548912A (zh) 自带黑体筑炉材料及其加热炉窑
CA2242780C (fr) Four utilise pour chauffer des feuilles de verre
JP2010236779A (ja) ローラハースキルンによるワークの焼成方法
JP4999422B2 (ja) 連続式の熱処理方法及び連続式の熱処理炉
CN1242236C (zh) 加热装置
KR100704242B1 (ko) 일방향　차열구조물 및 이를 적용한 판넬형 가열히터
EP0248674A1 (fr) Panneau d'isolation thermique
KR100195970B1 (ko) 히터봉으로 구획된 열처리실을 갖는 상향장전식 열처리로
KR200263303Y1 (ko) 도가니형 저항전기로
JPH11141901A (ja) 床暖房システム
CN223484853U (zh) 模组化窑炉发热体
CN219995890U (zh) 一种检测和烧结用箱式电阻炉
CS219521B1 (cs) Žárovzdorná vyzdívka, zejména elektrické laboratorní pece
CN103988575A (zh) 一种由耐火性磷酸盐水泥制成的单片热加热块
JP3094478B2 (ja) 鋼片加熱炉およびその排ガス循環方法
JP2001174159A (ja) 熱処理装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: COMMUNICATIONS OF 310303 AND AGAIN SENT ON 220403 CONCERNING NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 69(1) EPC. FORMS 1205 A, RETURNED UNDEL

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP