RCP Macpress - Improving the quality of RDF
16 February 2012, News release from R.C.P. SA
The benefit of producing refuse derived fuel or solid recovered fuel from the high calorific fraction of municipal solid waste is well known.
Separate and recycle the valuable materials including metal, paper and glass, shred, bale, wrap and burn the remaining high calorific element such as plastic, rubber and timber. Most of the material baled for RDF is probably destined for landfill and with the constant rise in the cost of land filling such material it makes eminent sense to turn it in to a fuel source, but there is always room for improvement.
Improving the quality of baled refuse derived fuel is essentially a matter of increasing the calorific value of the bale as far as possible and producing the heaviest and most stable bale possible. Storing bales of refuse derived fuel provides its own challenges such as reducing the speed at which the bale deteriorates, and preventing the bale absorbing moisture whilst it is being stored, especially if the bales are to be stored outside for some time.
The quality of the bale is largely down to the baling press used to produce the bale. Ideally you would be using a press capable of compressing a feed material with a flock size of between 1mm and 30mm. Failure to bale the smaller flock sizes will result in lower bale weight and increased wastage. It will also require the baling area to be cleaned more frequently and increase the machine maintenance. The press should also be capable of operating with a loose feed material supplied at around 180Kg per square metre. Lower rates increase baling costs and reduced production figures.
During bale production use only plastic tying wire, steel wire is unsuitable for RDF production. Wrap the bale in plastic film, this will increase the calorific value of the bale and also maintain the bales integrity and moisture content even if stored for some time.
A typical system would be a Mac 111/1 baling press, which is manufactured by Macpresse and supplied by R.C.P SA. A wrapping line such as the Rotowrap 40 wrapping line, also supplied by R.C.P SA, can be combined with the Macpresse range of baling presses for optimum bale production and storage. Macpresse are the only baling press manufacturer to produce a press capable of using both plastic and steel baling wire. For fuel production only plastic wire should be used.
For further information please email R.C.P. SA