Filters

20042

More filters

20242
Reset filters

Settings

Author: Frischat, Günther Heinz × Author: Schade, Wolfgang × End date: 2005 × Start date: 2000 × DDC: 660 × Has files: Yes × Publisher: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft ×

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Mid-infrared laser absorption spectroscopy for process and emission control in the glass melting industry : Part 2. Difference frequency generation based MIR laser spectrometer for glass melting furnaces
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2004) Wondraczek, Lothar; Heide, Gerhard; Frischat, Günther Heinz; Khorsandi, Alireza; Willer, Ulrike; Schade, Wolfgang
    Emerging techniques of mid-infrared absorption spectroscopy offer potentially great sensitivity and selectivity for combustion control and emission monitoring. Beeause of that, a differenee frequency based mid-infrared absorption spectrometer has been considered for application in the glass industry. Based on preliminary tests within laboratory conditions, a spectrometer which operates at wavelengths around 5 μm was applied to online monitoring of the atmosphere of a gas fired glass melting furnace. The CO concentration was measured in order to demonstrate the feasibility of a mid-infrared absorption spectrometer for process control in the glass industry. Α series of measurements was performed in situ as well as crossing the recuperator entry, resulting in general advice on the construction of a prototype device.
  • Thumbnail Image
    Item
    Mid-infrared laser absorption spectroscopy for process and emission control in the glass melting industry : Part 1. Potentials
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2004) Wondraczek, Lothar; Heide, Gerhard; Frischat, Günther Heinz; Khorsandi, Alireza; Willer, Ulrike; Schade, Wolfgang
    Laser spectroscopic diagnostics of combustion species at elevated temperature has shown considerable progress during the last years and decades. Particularly, techniques of mid-infrared absorption spectroscopy using fundamental rotational/vibrational transitions offer potentially great sensitivity and selectivity for combustion control. However, applications are still limited to mostly laboratoryscale investigations, which is mainly due to drawbacks of light sources and beam guidance materials. On the other band, many efforts are made to facilitate industrial application. In this context, the relevance of mid-infrared absorption spectroscopy for in situ monitoring of minor species in glass melting furnaces is obvious, too. The present paper gives a general review of available techniques and their impact on emission diagnostics in the glass industry, considering conventional as well as emerging light sources, detectors, peripheral devices and spectroscopic techniques.