Accurate and precise temperature measurement is critical
But float glass production can be expensive due to the high cost of transportation and energy required for glass melting (often up to 1700 ??C). In order to reduce costs, these plants tend to be regionally distributed to minimize the high costs of transportation and tend to operate continuously to minimize losses.
Energy consumption represents approximately 21% of the total cost of float glass production, not to mention the special costs associated with operation of the process’ melting furnace and unique reducing atmosphere Tin Bath.
Together the high temperature processes of glass melting and forming account for nearly 80% of the energy usage.
Accurate and precise temperature measurement is critical for efficient and cost effective melting, glass quality control, heat zone adjustment and stress reduction (annealing).
Monitoring temperature is also directly related to prolonging the life of critical assets such as refractory walls in the melting furnace.
For non-contact infrared temperature measurement systems, fully understanding the importance of various parameters is critical to select the correct instruments.
These parameters include transmission (?), reflection (?) emissivity (?) (or absorption (?)) of liquid and solid glass, refractory bricks lining the furnace and more.
For instance, a pyrometer or thermal imager with a detector that is sensitive at 1 ??m can be used to look through thin glass and/or directly measure wall temperatures as the glass emissivity is small, and transmission is large.
For thinner glass, selecting detectors that are sensitive in the 5-8 ??m range will ensure very high glass surface emissivity and provide accurate measurements on its surface.
System solutions involving non-contact thermal imaging and pyrometry can help increase production efficiency, reduce waste, and save money in the hot gas regenerator, melting tank, tin bath, and annealing lehr.
Keep in mind that a 1% efficiency gain can result in significant savings, over $1 Million annually for an average float glass production facility!
What solutions have you implemented to save on energy consumption costs?
Learn more about flat glass production process efficiency by downloading LumaSense’s
“Glass Production” eBook.
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