Industrial Microwave Units
From the laboratory to industrial scale equipment
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INDUSTRIAL MICROWAVE UNITS

Definition

Microwave are electromagnetic waves, between infrared and radio wavelength, approximately between 30 cm (1 GHz) and 1 mm (300 GHz)

 

Some materials fully reflect MW without heating (conductive material, metal)

Some materials are transparent to MW and do not heat.(quartz, Teflon…)

 

Some materials are polarised (molecular agitation) et heat in a MW field

 

Principle

Conventional heating

from the outside inwards
Microwave heating  from the inside outwards


 

 

The heating of a material subjected to a microwave field is caused by the rotation of the polar molecules whose intensity depends on the permittivity ε.

 

Example of the water molecule

Other molecules that water have a high permittivity, allowing very efficient heated to very high temperatures (calcination, expansion or vitrification)

Example of fresh plant cell (70 to 90% water) or rehydrated (ultrasonic)

Water molecule heating

  • Increasing the partial vapor pressure in the heart cells
  • « mechanical » dewatering

  • Extraction of essential oils, active ingredients, pigments,…

 

Very efficient and fast extraction