UNTHA Shredding Technology Gmbh

Reliable Shredding Technology for Refuse Derived Fuels (RDF) - Energy - Fuel Cells

Our shredding solutions enable you to optimally recycle waste into substitute fuels / alternative fuels and ensure high quality by producing a homogeneous granulate free of foreign objects. The goal of recycling is to use the valuable energy contained in the waste and to substitute the use of fossil fuels. During the recycling process the portions with a high calorific value are separated from the commercial and industrial waste and turned into a marketable product. Depending on the calorific value and the granular size, these fuels are used in fluidised bed combustion, cement plants and substitute fuel power plants.

The waste undergoes a single-phase or multi-phase recycling process to separate the fractions with a high calorific value from household waste, bulky waste, industrial waste, commercial waste and sorting residue. This process may consist of the following steps:

Single-phase recycling process:

  • Shredding
  • Separation of ferrous and non-ferrous materials

Two-phase recycling process:

  • Pre-shredding
  • Sifting process
  • Air separation
  • Separation of ferrous and non-ferrous materials
  • Ballistic separation
  • Separation of heavy materials
  • Optical sorting
  • Re-shredding

We are world leaders in this complex field of substitute fuel recycling. Regardless of whether you require single-phase or multi-phase shredding, we offer an economic and, first and foremost, reliable solution!

Utilization areas and fraction sizes of substitute fuels

  • Pre-shredded waste < 400 mm: The shredded material is particularly suitable for material recovery facilities (MRF)
  • Pre-shredded waste < 150 mm: This fraction size is suitable for co-generation power plants with grate firing, refuse combustion plants, material recovery facilities (MRF) and mechanical biological treatment. The untreated residential waste reaches an approximate calorific value of approximately 9-11 MJ/kg
  • Substitute fuel < 80 mm: for co-incineration use in cement plant calciners, fluidised bed combustion and power plants for energy recovery. The resulting calorific value of this fraction is approximately 15-18 MJ/kg
  • Substitute fuel < 30 mm (SRF): Ideally suited for the injection furnace in cement plants and substitute fuel power plants. The secondary fuels in the mixture for the co-incineration in cement rotary kilns must have a calorific value of at least 18-22 MJ/kg.