Energy-Efficient Oxy-Fuel Glass Furnace from China Suppliers - High-Temperature Production at Our 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
Frequently Asked Questions
Q: What is the typical melting output range of REFTECH oxyfuel furnaces?
Generally, REFTECH oxyfuel furnaces are designed for a melting output of 50 to 400 tonnes per day (t/d). In specialized cases, they can be designed for outputs as small as 2 t/d for specialty glass, reaching a maximum size of approximately 750 t/d.
Q: Why is the superstructure design modified in these furnaces?
The superstructure design requires modification due to the reduced flue gas volume characteristic of firing a furnace with fuel and oxygen. For instance, if flat flame burners are used, the arch must be kept relatively low to prevent it from getting too cold and causing rat holes.
Q: Where should the exhaust be located to optimize furnace life?
To ensure a longer furnace life, the exhaust can be positioned towards the middle of the furnace or near the throat. This placement ensures adequate heating in the batch charging area via local burners and helps reduce dust carry-over.
Q: What issues can arise from high flue gas velocities in the exhaust?
Excessive flue gas velocities in the exhaust and connected piping can cause difficulties in controlling furnace pressure. It can also lead to high furnace pressure due to an insufficient flue gas flow rate.
Q: How does REFTECH prevent damage caused by cold spots?
Cold spots can allow alkalis to infiltrate and cause burnouts in the arch, which reduces the overall life of the furnace. To prevent this, REFTECH® oxyfuel furnaces are adequately insulated and sealed.