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Energy Efficient Oxy-Fuel Glass Furnace Suppliers in China - High-Temperature Production Factory
Description
REFTECH oxyfuel furnaces are specially designed for the particular characteristics of firing a furnace with fuel and oxygen. Especially the reduced flue gas volume requires a modification of the superstructure design. If flat flame burners are used, the arch has to be kept relatively low, otherwise it will become too cold and this will lead to rat holes.
For longer life, the exhaust can be placed rather in direction of the middle of the furnace or even near the throat thus ensuring an adequate heating in batch charging area due to burners in this area and reducing carry-over (dust). Too high flue gas velocities in exhaust and subsequent piping can lead to difficulties in furnace pressure control and can even lead to high furnace pressure due to insufficient flue gas flow rate.
Cold spots would lead to damages due to the infiltration of alkalis which cause burnouts in the arch, thus leading to reduced furnace life. To avoid such problems the REFTECH® oxyfuel furnaces are therefore adequately insulated and sealed. In general oxyfuel furnaces are used for a melting output of 50 – 400 t/d, in some special cases as small as 2 t/d specialty glass. The maximum furnace size is approximately the same as for regenerative cross-fired furnaces, i.e. 750 t/d.
Features
Low investment costs for flue gas equipment due to low flue gas volume
Low energy consumption
Higher melting surface load
Reduced NOx emission
High glass quality
Low investment costs for refractories
Easily adjustable temperature profile due to lateral arrangement of burners
Shorter time from glass to glass
Frequently Asked Questions
What is the typical melting output of REFTECH oxyfuel furnaces?
In general, REFTECH oxyfuel furnaces are designed for a melting output ranging from 50 to 400 t/d. However, they can be designed for specialty glass applications as small as 2 t/d, with a maximum furnace size reaching approximately 750 t/d.
Why does the superstructure design require modification in oxyfuel furnaces?
The modification is primarily required due to the reduced flue gas volume that is characteristic of firing a furnace with fuel and oxygen instead of ambient air.
How do REFTECH furnaces prevent arch damage and rat holes?
When using flat flame burners, the arch is kept relatively low to prevent it from becoming too cold. Additionally, the furnaces are adequately insulated and sealed to eliminate cold spots, which prevents the infiltration of alkalis that cause burnouts in the arch.
What are the environmental and cost benefits of these furnaces?
They offer reduced NOx emissions and low energy consumption. Additionally, the reduced flue gas volume leads to lower investment costs for flue gas equipment, and there are lower investment costs required for refractories.
How is the exhaust placement optimized for longer furnace life?
The exhaust can be positioned towards the middle of the furnace or near the throat. This ensures adequate heating in the batch charging area via local burners and reduces dust carry-over, thereby extending the overall life of the furnace.