Burn-Off Ovens - How They Work and Are They Right For You?
What are Burn-Off Ovens used for?
The Batch Burn-Off Oven is designed to remove coating from hooks, racks, fixtures and parts.
How do Burn-Off Ovens work?
Removal of a coating is accomplished by heating the materials to be stripped to 800F. The coating is reduced to a fine, light ash and fumes. The fumes produced are vented through an afterburner chamber which raises the fume temperatures to 1400F or higher for a minimum of ½ second. The resultant effluent discharged to atmosphere consists of water vapor (H2O) and carbon dioxide (CO2). Ash reduction remains inside the oven and consists primarily of inorganic pigments. Ash is removed from the oven and disposed of in accordance with local codes.
The basic oven consists of a steel enclosure with insulated interior walls and roof and a refractory floor. A refractory plenum is provided to distribute heat evenly throughout the oven. Primary burner and controls are mounted at the rear of the unit. A jack mount afterburner is included with high temperature stack, weather cap and roof flange. A cart is provided for loading and unloading the oven.
What to look for when purchasing?
Once you discover if a Burn-Off oven will work for your application make sure you find the right size. If you get an oven that is too large it will increase your cycle times therefore increasing your operating cost. You also do not want to get a unit that is so small it will not keep up with production. A quick analysis of the size of parts, racks, or baskets you are placing in the unit will be very helpful in determining the appropriate size. When receiving quotes from manufacturers make sure you know the usable space of the oven (the cart dimensions) and not just the "wall to wall" dimensions. The wall to wall dimensions may fit your size but when the cart is utilized you may find the unit to be too small.
Cost of operation?
The cost of operating a burn-off oven will vary depending on how much your utility company charges per CFH. As a rule of thumb you can use the formula per 1000 CFH (for natural gas). So an example would be if an oven used 750,000 BTU/hour then the operating cost would be about .50 per hour.
Electric Wall Oven - Burn-Off Ovens - How They Work and Are They Right For You?
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