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Energy Efficient Oxy-Fuel Glass Furnace from China Suppliers - High Temperature Production at Competitive Factory Rates
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
1
Low investment costs for flue gas equipment due to low flue gas volume
2
Low energy consumption
3
Higher melting surface load
4
Reduced NOx emission
5
High glass quality
6
Low investment costs for refractories
7
Easily adjustable temperature profile due to lateral arrangement of burners
8
Shorter time from glass to glass
Frequently Asked Questions
What are the primary applications of REFTECH oxyfuel furnaces?
REFTECH oxyfuel furnaces are typically used for melting outputs ranging from 50 to 400 t/d. In specialty cases, they can be designed for outputs as small as 2 t/d for specialty glass, with a maximum capacity of approximately 750 t/d.
How does the design of the superstructure differ in oxyfuel furnaces?
Due to the reduced flue gas volume characteristic of oxyfuel combustion, the superstructure design must be modified. For instance, when using flat flame burners, the arch must be kept relatively low to prevent it from becoming too cold and forming rat holes.
Why is proper insulation and sealing critical for these furnaces?
Proper insulation and sealing prevent cold spots. Cold spots can cause the infiltration of alkalis, leading to burnouts in the arch and ultimately reducing the overall lifespan of the furnace.
What are the main environmental and economic benefits of REFTECH oxyfuel furnaces?
Key benefits include reduced NOx emissions, lower energy consumption, low investment costs for refractories, and lower investment costs for flue gas equipment due to the reduced volume of flue gas.
How is the exhaust system optimized to extend furnace life?
The exhaust can be positioned towards the middle of the furnace or near the throat. This configuration ensures adequate heating in the batch charging area via local burners and minimizes carry-over (dust) to prolong the furnace's service life.