Thermal Box-Barriere - the device for temperature measurement in industrial continuous furnaces

Description

Thermal Box-Barriere

Measurement in continuous furnaces is a quite complicated because of high temperatures, continuously moving charge and other technological conditions. Therefore, a method based on thermal box-barrier was developed and applied for a real measurement. Thermal box-barrier (TBB) is a special type of a technical thermal barrier. It is used to protect a device inside the barrier against a high temperature environment or mechanical damage. A special multi-layered structure of the barrier provides a sufficient thermal protection and allows its moving throughout the furnace together with the charge. Time and position evolution of the charge and furnace temperature are measured by thermocouples near the TBB and logged into a data acquisition device inside the TBB. The TBB protect the electronic device with maximum service temperature about 60 °C against high temperature inside the furnace, which can exceed 1200 °C. The performed experiments verified that it is possible to measure furnaces of length of several tens of meters in steelworks production lines, where the passage throughout the furnace takes several hours. However, the TBB shape, dimensions and internal structure can vary according to requirements and limitations given by the measured furnace. The requirements and limitations are generally very specific for different technologies. Therefore, a thermal box-barre is designed for each project individually. Only few commercial companies worldwide offer a similar product, however, most of the offered devices are designed for lower temperatures and shorter times in a high temperature environment.

Customer benefits

  • Device for temperature and surroundings measurement in industrial continuous furnaces
  • Electronical devices inside the thermal box-barrier is protected several hours in furnace atmosphere temperature up to 1200 °C, while a maximum temperature inside the TBB does not exceed 60 °C
  • Such a measurement allows obtaining crucial information for furnace or heating process optimization

References

Železárny Hrádek (Steelworks Hrádek), Czech Republic, industrial pussher-type furnace for steelslabs reheating

Stahlwerk Thueringen (Steelworks Thueringen), Czech Republic, industrial pussher-type furnace for steel slabs reheating

Sochorová válcovna Kladno (Billet Mill Kladno), Czech Republic, continuous walking-beam furnace for steel slabs reheating

ArcelorMittal Ostrava (mill), Czech Republic, continuous walking-beam furnace for steel slabs reheating

Kovárna Viva Zlín (forging company), Czech Republic, continuous beam furnace for forgings reheating

Czech Republic

Reference - publications

  • Honner M., Švantner M.: Thermal box-barrier for a direct measurement in high temperature environment, Applied Thermal Engineering, Vol. 27, No. 2-3, pp. 560-567, 2007, ISSN: 1359-4311
  • Honner M., Veselý Z., Švantner M.: Temperature and heat transfer measurement in continuous reheating furnaces. Scandinavian Journal of Metallurgy, Vol.32, No.5. pp.225-232, 2003, ISSN 0371-0459 Honner M., Veselý Z., Švantner M., Čejka F.: Optimal heating control system for continuous furnaces. Industrial Heat Engineering, Vol.23, No.3. pp.105-111, 2001, ISSN 0204-3602
  • Honner M., Veselý Z., Švantner M., Litoš Pa., Bauer K., Hercík M., Kuba A.: Optimization of continuous industrial furnace operation. Proc. of the 6th European conference on Industrial Furnaces and Boilers - INFUB 2002, Lusíada University (Portugal), University of Glamorgan (UK), University of Karlsruhe (Germany), 2nd-5th April 2002, Lisboa, Portugal, pp.85-94, 2002, ISBN 972-8034-05-9
  • Švantner M., Honner M., Veselý Z., Čejka F., Bauer K., Čermák F.: Temperature and heat transfer measurements in continuous furnaces. Proc. of the 6th European conference on Industrial Furnaces and Boilers - INFUB 2002, Lusíada University (Portugal), University of Glamorgan (UK), University of Karlsruhe (Germany), 2nd-5th April 2002, Lisboa, Portugal, pp.95-104, 2002, ISBN 972-8034-05-9

Contact person

Michal Švantner
Ing. Michal Švantner, Ph.D.
Telefon: +420 737 914 978
Email: msvantne@ntc.zcu.cz
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