Erdwich Zerkleinerungs-Systeme GmbH

Substitute fuel sampling system - Waste and Recycling - Recycling Systems

Analytical shredding systems for QA work are a fundamental preliminary component in the production of substitute fuels. With primary fuels and finite resources subject to continuous price increases, the significance of substitute fuels continues to rise unabated. For plant operators, this offers first-class potential and attractive prospects for the future. Businesses that buy in their substitute fuel from external suppliers are faced with two key analytical requirements before putting it to use: pollutant analysis and calorific analysis. To ensure the proper handling of these analyses, a sophisticated sampling system is required.

Very recently the Heating Value Regulation in the German Waste Processing Business Act was abolished. This regulation had made it easier for industrial businesses such as Cement Manufacturers to additionally use refuse derived fuels (R.D.F.) such as old tires as fuels. A prerequisite for this was that the heating value of the waste materials was at least 11,000 kJ/kg. As a result of the change it is expected that annually some 80,000 tons of old tires, which otherwise would have served as R.D.F. will be recycled.

In addition, in future, the high quality of the waste materials used in cement works will be important. They will have to be tested in a laboratory. In order to provide representative sample probes of the R.D.F., it is advisable to employ an automated sample extraction system. This prepares the material for the laboratory analysis so that the product quality and heating value can be evaluated.

System criteria:
  • Representative sampling from primary sample quantity, generally 200–250 litres
  • Shredding of primary material from approx. 30 mm to the appropriate lab shredder particle size of approx. 5–8 mm
  • Homogenisation of the primary sample, to enable the representative sampling of the 1-litre lab sample
  • A high degree of process automation, to exclude human sources of error or manipulation
  • Automated return of sample waste to the stove feeder system
  • Reproducibility and documentation trail for the sampling process