EP0949477A1 - Verfahren zum Betrieb eines Ofens und Vorrichtung dafür - Google Patents

Verfahren zum Betrieb eines Ofens und Vorrichtung dafür Download PDF

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Publication number
EP0949477A1
EP0949477A1 EP99400640A EP99400640A EP0949477A1 EP 0949477 A1 EP0949477 A1 EP 0949477A1 EP 99400640 A EP99400640 A EP 99400640A EP 99400640 A EP99400640 A EP 99400640A EP 0949477 A1 EP0949477 A1 EP 0949477A1
Authority
EP
European Patent Office
Prior art keywords
temperature
chimney
oven
measured
furnace
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.)
Withdrawn
Application number
EP99400640A
Other languages
English (en)
French (fr)
Inventor
Philippe Beaudoin
Benoit Loiselet
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP0949477A1 publication Critical patent/EP0949477A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/26—Arrangements of controlling devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B61/00—Wardrobes
    • A47B61/003—Details of garment-holders
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B97/00—Furniture or accessories for furniture, not provided for in other groups of this subclass
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G25/00—Household implements used in connection with wearing apparel; Dress, hat or umbrella holders
    • A47G25/02—Dress holders; Dress suspending devices; Clothes-hanger assemblies; Clothing lifters
    • A47G25/06—Clothes hooks; Clothes racks; Garment-supporting stands with swingable or extending arms
    • A47G25/0692—Details of rods for suspending clothes-hangers
    • 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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • 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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/42—Arrangement of controlling, monitoring, alarm or like devices
    • 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
    • F27D19/00—Arrangements of controlling devices

Definitions

  • the invention relates to a method of operating an oven such as for example an oxy-fuel rotary oven, comprising an angled chimney evacuation of smoke at the outlet of the oven, air introduction means ambient in said chimney and a smoke extractor arranged in the chimney, downstream of said ambient air introduction means.
  • gas analyzers are measuring instruments of high technology which are therefore very expensive, particularly in which relates to analyzers having good reliability and good accuracy.
  • the invention aims to overcome these various drawbacks by proposing a method of operating an oven and a device for implementing the same which is reliable and low cost.
  • the invention further relates to a device for operating an oven.
  • a device for operating an oven comprising a smoke evacuation chimney, introduction means of ambient air in said chimney and a smoke extractor arranged downstream said means for introducing ambient air, for implementing the method as defined above, characterized in that it further comprises a first and a second smoke temperature sensor, the first of which is placed near the exit of the oven and the second of which is placed in the chimney, downstream of the first sensor, means for subtracting the temperature measured by the second sensor from that measured by the first sensor, means for comparing the result of subtraction with a value setpoint ⁇ T and, controlled by said comparison means, means for reducing the ratio of fuel flow to oxidant flow introduced into the oven when the result of the subtraction is less than one setpoint.
  • the device according to the invention can also include the characteristic, according to which it further comprises means for storage of a reference temperature, means for comparing the temperature measured by the first sensor at the reference temperature and, controlled by said means for comparing the measured temperature by the first sensor at the reference temperature, means increase in the ratio of fuel flow to oxidant flow introduced into the oven when the smoke temperature measured by the first sensor is lower than the reference temperature.
  • the single figure shows an oxy-fuel rotary oven 1 equipped with a driving device 3 according to the invention.
  • the oven 1 comprises an inlet 5 provided with a burner 7 by through which an oxidant such as for example oxygen or air enriched with oxygen, and a fuel, such as natural gas, are introduced inside the furnace 1, and an outlet 9 through which the fumes, that is to say the combustion products are evacuated via a chimney 11.
  • an oxidant such as for example oxygen or air enriched with oxygen
  • a fuel such as natural gas
  • the chimney 11 comprises a bent portion 13 which is extends by a vertical portion 14 in which are arranged successively a filter 15 and an extractor 16.
  • the extractor 16 sucks the fumes from the oven 1 in the chimney 11 and projects these, once filtered, into the atmosphere surrounding.
  • the internal walls of the bent portion 13 are coated with a material refractory 17.
  • the entry 18 of the angled portion 13 has a shape flared towards the outlet 9 of the oven 1 and is arranged at a distance, with a certain interval 19, opposite this.
  • the interval 19 between the inlet 18 of the chimney 11 and the outlet 9 of the oven 1 acts as a means of introducing ambient air into the chimney 11 to cool the fumes leaving the oven 1 before they reach the filter 15 arranged further downstream.
  • the device 3 for driving the oven 1 comprises a first sensor temperature 30 disposed at a first location 31 nearby from outlet 9 of the oven, i.e. either directly into it or, like this is shown in the figure, just at the entrance 18 of the angled portion 13 of the chimney 11.
  • the sensor 30 is centered in the inlet 18 so that it does not come into contact with the ambient air which enters laterally (indicated by arrows 25) in the chimney 11 under the suction effect of the extractor 16.
  • the device 3 for driving the furnace 1 further comprises a second temperature sensor 32 disposed at a second location 31 centered in the chimney 11 downstream from the first location 31, preferably after the bent part 13 of the chimney 11.
  • the temperature sensors 30 and 32 are for example formed by thermocouples.
  • Each sensor 30, 32 is connected to an input of a subtractor 34 whose result of subtraction of the temperatures delivered by the sensors 30 and 32 is compared in a first comparator 35 to a set value ⁇ T positive or zero stored in a memory 35A.
  • the setpoint ⁇ T is a value determined experimentally and corresponding to the difference in temperatures at the level of respectively first location 31 and second location 33 when the oven is optimally adjusted.
  • the oven is set optimally when its performance is at its maximum, which is the case when on the one hand there is not an excess of oxygen cooling the furnace and, when on the other hand, the CO content of the fumes leaving the oven is minimal.
  • this setpoint can also be equal to zero in one embodiment simplified of the invention.
  • the comparator 35 control means 36 for regulating the oxidant and fuel introduced into the furnace 1 via a line 38 of oxidant flow control and a 40 flow control line fuel connected to the burner 7.
  • the device 3 comprises a second comparator 42 of which a first input is connected to the sensor 30 and a second input is connected to storage means 44 for a reference temperature.
  • the output of the second comparator 42 is also connected to the means 36 of regulation in order to control these according to the comparison result between the temperature delivered by the sensor 30 and the reference temperature stored in memory 44.
  • the oven 1 During the operation of the oven 1, it is introduced via from the burner 7 a certain oxidant / fuel mixture in the oven 1, this mixture being regulated by the means 36 for regulating the flow rates.
  • This mixture can be characterized by the ratio of fuel flow to the oxidant introduced into the furnace 1.
  • the process according to the invention consists in measuring on the one hand, by means of the sensor 30, the temperature of the fumes leaving the furnace 1 and on the other hand, downstream of the sensor 30 and by means of the sensor 32, the temperature of the flue gases downstream of the zone 50 in which post-combustion can occur.
  • the measured temperature by the sensor 32 is subtracted from that measured by the sensor 30 by means of subtractor 34.
  • the result of the subtraction is compared using the comparator 35 in device 3 at the set value ⁇ T.
  • the comparator 35 controls the means 36 to decrease the fuel flow ratio at the oxidant flow introduced into the furnace. This decrease in the ratio of the two flows can be achieved either by increasing the oxidant flow or by reducing the flow of fuel introduced into the furnace.
  • the measured temperature by the sensor 30 is further compared to the reference temperature stored in memory 44.
  • This reference temperature is a value of temperature found by experiments and corresponding to the temperature fumes leaving the oven during optimized operation.
  • the comparator 42 commands the means 36 to increase the flow rate ratio of fuel at the flow rate of the oxidant introduced into the furnace, this either by reduction of the oxidant flow, ie by an increase in the fuel flow.
  • thermocouples the material used, especially thermocouples, has the advantage to be robust and easy to maintain and install.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Control Of Combustion (AREA)
EP99400640A 1998-04-02 1999-03-16 Verfahren zum Betrieb eines Ofens und Vorrichtung dafür Withdrawn EP0949477A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9804115 1998-04-02
FR9804115A FR2777075B1 (fr) 1998-04-02 1998-04-02 Procede de conduite d'un four et dispositif pour la mise en oeuvre du procede

Publications (1)

Publication Number Publication Date
EP0949477A1 true EP0949477A1 (de) 1999-10-13

Family

ID=9524788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99400640A Withdrawn EP0949477A1 (de) 1998-04-02 1999-03-16 Verfahren zum Betrieb eines Ofens und Vorrichtung dafür

Country Status (5)

Country Link
US (2) US6247416B1 (de)
EP (1) EP0949477A1 (de)
JP (1) JPH11325738A (de)
KR (1) KR19990082779A (de)
FR (1) FR2777075B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002020859A2 (de) 2000-09-08 2002-03-14 Alumonte Technologiefortschritt In Alumnium Gmbh Verfahren zum salzlosen oxidationsfreien umschmelzen von aluminium, dessen legierungen sowie von aluminiumschrotten
EP4202297A1 (de) 2021-12-21 2023-06-28 L'Air Liquide, société anonyme pour l'Étude et l'Exploitation des procédés Georges Claude Verbrennungsverfahren

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US6866396B2 (en) * 2002-10-09 2005-03-15 Jji Lighting Group, Inc. Illuminating device with rotatably adjustable support
FR2854408B1 (fr) * 2003-04-30 2006-05-26 Air Liquide Procede de traitement d'aluminium dans un four
US20040257802A1 (en) * 2003-06-18 2004-12-23 Jacek Helenowski Support rod for a light source
US7434665B2 (en) * 2003-07-21 2008-10-14 Otis Elevator Company Elevator down peak sectoring with long call response
FR2866656B1 (fr) * 2004-02-25 2006-05-26 Air Liquide Procede de traitement d'aluminium dans un four rotatif ou reverbere
US8113679B2 (en) * 2005-12-12 2012-02-14 Koninklijke Philips Electronics N.V. Light system and method for creating a localized light
DE202006001173U1 (de) * 2006-01-25 2007-06-14 Hettich-Heinze Gmbh & Co. Kg Beleuchtungseinrichtung
US20080253112A1 (en) * 2007-04-10 2008-10-16 Nash Alan C Hand rail system railing connector
US20080099419A1 (en) * 2006-10-31 2008-05-01 Costa Charles A Closet rod assembly
US20080148526A1 (en) * 2006-12-22 2008-06-26 Robert Stephen Garcia Drapery rod
DE102007002637A1 (de) * 2007-01-12 2008-07-17 Raumplus Gmbh & Co. Kg Regalsystem
EP2159525A1 (de) * 2008-08-29 2010-03-03 Air Liquide Deutschland GmbH Verfahren zum Betrieb eines Ofens sowie Vorrichtung zur Durchführung des Verfahrens
KR100921616B1 (ko) * 2008-10-31 2009-10-15 오세기 표시성 라이트 바가 구비된 행거
US8028844B2 (en) * 2008-11-20 2011-10-04 Costa Charles A Sliding closet rack
US20110144790A1 (en) * 2009-12-15 2011-06-16 Terry Gerritsen Thermal Sensing for Material Processing Assemblies
FR2954068A1 (fr) * 2009-12-21 2011-06-24 Hmy Accessoire de presentation d'articles personnalisable
FR2959298B1 (fr) 2010-04-23 2012-09-21 Air Liquide Four a flamme et procede de regulation de la combustion dans un four a flamme
EP2664884B1 (de) * 2012-05-18 2019-08-07 Air Products and Chemicals, Inc. Verfahren und Vorrichtung zum Erwärmen von Metallen
US9078516B2 (en) * 2012-10-24 2015-07-14 Glenn Vogel Wine rack storage system
US10068501B2 (en) * 2014-11-30 2018-09-04 Hudson & Broad, Inc. Modular light merchandising system
US9854907B2 (en) * 2015-04-07 2018-01-02 Theodore Best Pivotable support for clothing articles
US10226862B2 (en) * 2017-05-19 2019-03-12 James Francis Blake Convertible tool case to a support assembly
US10542822B2 (en) * 2017-05-19 2020-01-28 James Francis Blake Convertible tool case to a stepstool
US9918568B1 (en) * 2017-05-19 2018-03-20 James Francis Blake Position adjustable support assembly
CN107904401A (zh) * 2017-11-16 2018-04-13 石昌梅 一种烟化炉
CN107805713A (zh) * 2017-11-16 2018-03-16 石昌梅 一种提升物料利用率烟化炉
CN107916334A (zh) * 2017-11-16 2018-04-17 石昌梅 一种环保烟化炉
CN107858512A (zh) * 2017-11-16 2018-03-30 石昌梅 一种高效烟化炉
CN107916333A (zh) * 2017-11-16 2018-04-17 石昌梅 一种自动调温烟化炉
CN111121872B (zh) * 2019-12-27 2022-07-15 液化空气(中国)投资有限公司 一种能够实时监控、调节炉内燃烧状况的装置和方法

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Publication number Priority date Publication date Assignee Title
WO1990006432A1 (en) * 1988-12-03 1990-06-14 Robert Bosch Gmbh Engine exhaust system
EP0553632A2 (de) * 1992-01-31 1993-08-04 Linde Aktiengesellschaft Geregelter Betrieb von Industrieöfen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002020859A2 (de) 2000-09-08 2002-03-14 Alumonte Technologiefortschritt In Alumnium Gmbh Verfahren zum salzlosen oxidationsfreien umschmelzen von aluminium, dessen legierungen sowie von aluminiumschrotten
EP4202297A1 (de) 2021-12-21 2023-06-28 L'Air Liquide, société anonyme pour l'Étude et l'Exploitation des procédés Georges Claude Verbrennungsverfahren

Also Published As

Publication number Publication date
FR2777075A1 (fr) 1999-10-08
FR2777075B1 (fr) 2000-05-19
US6582096B1 (en) 2003-06-24
JPH11325738A (ja) 1999-11-26
KR19990082779A (ko) 1999-11-25
US6247416B1 (en) 2001-06-19

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