INNOVATION IN WASTE SCREENING AND SELECTION

Stepper Screen, the new waste screening machine patented by Pal which revolutionises the concepts of selection and cleaning of recyclable material by reducing space requirements and maintenance.

 

Also this year, PAL presented at ECOMONDO with a new patent dedicated to urban and industrial waste treatment: STEPPER SCREEN, the new screening machine that introduces important innovative techniques for the selection and cleaning of recyclable materials.

For the company based in Ponte di Piave (TV), already world’s leading manufacturer of technologies to recycle wood and biomasses, this is the second technological novelty in the environmental field after the launch - during the last edition - of ARC 15, the aeraulic separation system dedicated to refining RDF and quality compost.

An official entrance into the Green Economy by the PAL IMAL Group which, despite the unfavourable international economic situation, invested in technology and innovation combining research, training and development with thirty years' experience gained in the industrial plant sector and well over 4,400 machines sold successfully worldwide. “An important widening of the offer – Andrea Dal Ben comments – also proven by major international contracts, which confirms the strong commitment by the company to the development of environment-protecting technologies”.

STEPPER SCREEN stems from a new screening concept, recently patented by PAL, which combines in a single machine the screening properties of star-screens and ballistic-screens, simultaneously reducing any maintenance, clogging and cleaning issues associated with traditional machines. These properties are possible thanks to the new screening system consisting in special shovels which, through an alternating movement, hit the material in such a way as to allow:

·         the screening of fine materials (sub-sorting) according to the desired weight and size;

·         the dynamic regulation (sub-inverter) of the flow and the material conveyance speed;

·         the separation of flat bodies from round bodies;

·         the separation of light oversize from heavy oversize by inserting (optional) the ARC screen;

·         the auto-cleaning system and anti-clogging system of the screening piece;

Another important feature of the new system is that it does not react to frayed items (nylon, ropes, straps, iron wire, etc.) which represent one of the most important maintenance problems of traditional machines. In this way the performance of the machine stabilises over time and the maintenance times at the end of the day can be drastically reduced.

STEPPER SCREEN has shown its best operating features in selection of mixed recyclable materials (Glass, Paper, Plastics), in the refining of quality compost, in the refining of RDF, in the selection of dry/wet and in the screening of demolition waste.

The machine presented to ECOMONDO 2010 is the STS model, specifically conceived and developed to refine quality compost.

One aspect that seems to be particularly appreciated by operators is that the STEPPER SCREEN can be matched with the ARC aeraulic cleaning system to allow for the simultaneous and selective demolition of light sheet elements (nylon, bags, plastics) which in waste sorting plants introduce numerous problems in the automatic selection of recyclable materials.

Besides the specific thematic, the machine was favourably judged by sector operators also for its high and specific efficiency and for its compact size, which allows it to be fitted also in the case of revamping existing equipment.

The production and sale of the STEPPER SCREEN, and of all the technologies of the green sector, is taken care of by the PAL’s GREEN DIVISION.