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Continuous microwave systems for drying and heating of products

Microwave tunnel oven systems are the masters of efficiency. These systems allow products to be dried or heated at high speed by using a conveyor belt. 

We have optimised numerous production lines with our know-how in the microwave process. The advantages of microwave technology are obvious: significantly shorter heating times and thus optimised production runs, fewer interruptions, energy efficiency through direct irradiation of the product and gentle treatment.

Some of the important application examples for drying and heating of products are:

  • Drying of technical ceramics such as diesel particulate filters
  • Drying of hollow fibers during dialyzer production
  • Preheating of wood fibre boards (MDF, HDF)
  • Vulcanization of rubber profiles
  • Pasteurisation of convenience foods
  • Disinfection of packaged food. 

The geometric design of the microwave heating zone (applicator), the use of special microwave coupling systems (antennas) and the automatic calculation of the required microwave power produce high homogeneous microwave fields. The required space is optimised by using microwave generators with high output power.

Hybrid microwave test tunnel 

Product and process testing

For practical and professional microwave drying tests with microwaves (up to 200° C) and hot air (up to 80° C), our modern mobile hybrid microwave test tunnel is available to determine all necessary process parameters for process design. The tunnel is mobile and can be rented for tests at our site or at almost any other location.

 

 

 

Key Features

  • Conveyor belt coated with Teflon and is temperature resistant up to 200°C. The oscillation mode can endless seesaw oscillate enabling the practical determination of the required and optimal length of the microwave zone
  • Exhaust and heating system, tube Ø 100 mm, connection for emission stream measurement
  • Two frequency ranges possible: 915-MHz with 60 kW and 2450 MHz with 12 kW
  • Non-contact measurement of the surface temperature using four IR pyrometers
  • PLC including Touch Panel 12“
  • Easy programming of recipes for the Automatic Operation Modus
  • The penetration depth of the microwaves and the temperature distribution in the product can be determined experimentally using a fiber-optic, 8-channel temperature measuring device

 

Have we convinced you? Then get in contact with us.

Product examples:

Microwave tunnel for drying animal feed

Microwave tunnel for drying animal feed

  • Application: Continuous microwave dryer for selective and fast drying of 17 different types of vegetarian pet food
  • Microwave power: 24 kW
  • Effective length: 5000 mm
  • Effective width: 400 mm
  • Effective height: 320 mm
  • Total length: 11200 mm
  • Total height: 2400 mm
  • Total width: 800 mm

Continuous microwave heating plant for homogeneous preheating of wood materials

Continuous microwave heating plant for homogeneous preheating of wood materials

  • Application: Preheating of wood fibre (MDF)
  • Microwave power: 720 kW
  • Effective length: 5500 mm
  • Effective width: 2750 mm
  • Useful height 16 mm
  • Total length: 21000 mm
  • Total width: 3000 mm
Microwave hybrid continuous dryer for fast and homogeneous drying of technical ceramics

Microwave hybrid continuous dryer for fast and homogeneous drying of technical ceramics

  • Application: Honeycomb Ceramics
  • Microwave power: 32 kW
  • Hot air: 72 kW / max. 80°C
  • Effective length: 4660 mm
  • Effective width: 500 mm
  • Useful height 50 mm
  • Total length: 8500 mm
  • Total width: 3000 mm
Microwave pasteurization tunnel for homogeneous, selective and gentle heat treatment of ready meals

Microwave pasteurization tunnel for homogeneous, selective and gentle heat treatment of ready meals

  • Microwave power: 108 kW
  • Effective length: 9000 mm
  • Effective width: 1400 mm
  • Useful height up to 50 mm
  • Total length: 14000 mm
  • Total width: 2350 mm
  • Total height: 4400 mm
Modular microwave tunnel for homogeneous pasteurisation of packed meat products

Modular microwave tunnel for homogeneous pasteurisation of packed meat products

  • Application: Pasteurisation of packed meat products
  • Hygienic design
  • Microwave power: 110 kW
  • Effective length: 9280 mm
  • Effective width: 1200 mm
  • Useful height 130 mm
  • Total length: 15000 mm
  • Total width: 3000 mm
Modular microwave tunnel for homogeneous pasteurisation of packed mussels

Modular microwave tunnel for homogeneous pasteurisation of packed mussels

  • Application: Pasteurisation of packed mussels
  • Hygienic design
  • Microwave power: 180 kW
  • Effective length: 6000 mm
  • Effective width: 1200 mm
  • Useful height 80 mm
  • Total length: 13000 mm
  • Total width: 3000 mm
  • Total height: 2800 mm
Applicator PUL 3xCF

Applicator PUL 3xCF

The applicator PUL 3xCF is used for the preheating of three carbon fibre bundles at the same time. Carbon fibre pultrusion was very difficult until yet, because the conductive fibres cause a large leakage radiation. With a special design of the in- and outlets of the applicator it was possible to decrease the radiation to a legal limit.