Drying ovens are used in industry to counteract the humidity from heat treatment processes.
During high temperature curing processes moisture can be pushed out of solid samples into the atmosphere of the chamber, resulting in an increase in humidity.
Drying ovens use a unique form of thermal processing to remove water vapor from the furnace, which, if left in the chamber, could be hygroscopically reabsorbed by the product.
Reabsorption of water by the product is not favorable as it results in lower yields and can impact the properties of the final product, making it more likely to fail in its application.
The curing of sensitive and important materials such as pharmaceutical products, industrial resins and electronic parts must therefore take place in drying ovens. These ovens are designed to remove any water vapor generated during the curing process and replace the vapor with cool, ambient air.
Whilst the use of this method improves the product yield and quality by reducing the product’s re-absorption of water it is not without its problems. The process air added to replace the moisture can react with the high-temperature heating elements, resulting in cross-contamination and the oxidation of sensitive metals.
There is an even higher risk of mechanical failure in drying ovens when the load factor is increased, or heavy-duty heaters are required. When greater loading is required heaters of specialized chemistries, designed to be less prone to oxidation, are required to mitigate the effects of the processing air.
Retrofitting Drying Ovens with CoilCraft Heaters
The capacity of existing drying ovens can be improved by retrofitting with CoilCraft heating elements. Whilst conventional retrofits require the entire oven to be dissembled and completely rewired, CoilCraft Elemental Systems (CCES) can be added using a simpler, less disruptive method.
The new heaters can be installed in configurations specific to existing applications, with the same lead outlets as older plates. This allows the new system to be easily installed without the need to take the furnace apart.
The ability to be quickly replaced also means future furnace maintenance or replacement of failed components will be fast, removing the amount of downtime.
The CCES, like conventional heating matrices, is built of an inert ceramic core, with a heavy gauge wire element surrounding it. Drying ovens retrofitted with a new CCES system enhance product yields, efficiency and quality as they provide excellent temperature uniformity.
The improved chemical resistance of the heating elements also means the improved ovens can operate over more heating cycles, even when exposed to processing air.
Thermcraft’s Industrial Drying Ovens
Thermcraft is a key player in the scientific and industrial sectors for the supply of custom, industrial thermal processing equipment. Their large product range means they can supply furnaces for any application, and their intensive aftercare program ensures that your furnace operates optimally.
This information has been sourced, reviewed and adapted from materials provided by Thermcraft Inc.
For more information on this source, please visit Thermcraft Inc.