Infrared heating is the
transfer of energy via electromagnetic radiation between a source
and an object. Most materials absorb heat in the infrared wave
band with useful wavelengths for industrial applications in the
3 to 8 micron ranges. Radiant heating (electric, gas, steam, oil)
is often used for drying textiles, ceramics, paint (wood and metal),
hardening powder paint and heat treatment of plastics. Radiant
heat is most beneficial in rapid direct heating of a product.
Advantages
- High
rate of heat transfer
- Provides
quick start-up
- Requires
less space
- No
air movement
- Undisturbed
product or coating
- Energy
efficiency
- Potentially
lowest capital cost
Challenges
- Temperature
control
- More
difficult to control
- Potential
for overheat
- Line
of sight heat transfer
- Precise
layout of sources
- Heating rate depends
on product characteristics
- Relies on thermal conductivity
of the product to heat interior of thick products
Types of Infrared Ovens/Dryers
• The Perfect Radiant® Oven
is ideal for products which should not be directly exposed
to radiant heaters for concern
of ignition. When a web or fabric is heated to remove solvent,
there is concern that solvent vapors may create a fire if they
come in contact with the heating element. Perfect Radiant® incorporates
special classified electric heaters which reduce or eliminate
the possibility of solvent ignition. This oven is based on the
long-wave infrared in the electromagnetic energy spectrum.
• THERMODRY®
dryers utilize a combination of infrared and convection to
solve the challenges of drying and curing for
industries such as textile or converting. Litzler follows a systematic
approach to the design of drying and curing ovens. We thoroughly
analyze your needs and constraints, and then design a flexible
oven to operate efficiently and to effectively provide the optimum
results you require.
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