Page 45 - Hub-4 Magazine Issue 58

Recycling
Jonathan Fallon – Project Manager for Eggersmann, described the plant flow. “Essentially it is a twin-line system with waste material delivered to an in-feed hall where it is stored and then fed into the system, each line operating at approx. 36t/hr to produce the required 190,000 tonnes per annum throughput.
“Two static high-torque, slow-speed Shredders reduce the maximum waste size down to <300mm, the waste is then delivered via twin conveyors into two Trommel Screens which make three separations at 80/200/300mm. Any oversize (>300mm) is redirected back via conveyors to the in-feed hall for reprocessing. The remaining fractions then travel by conveyor passing through Overband Magnets and Eddy Current Separators to
remove any ferrous and nonferrous metals. These metals are then conveyed to the picking cabin for quality control and into designated bays in the out-feed hall.
“The mid-fraction material, after passing through the metals recovery stage, is then conveyed to two Optical Sorters which positively eject all dense plastic material. The ejected plastics are then conveyed to the Ballistic Separator which separates the rounds from the flats. The recovery of the round dense plastic material is then conveyed to the picking cabin where non-target material is removed and the remaining dense plastic material is conveyed to a twin-ram baler where it is baled. All recovered metal and dense plastic material is then sent off site for specialised recycling.”
Jonathan continued, “Everything except the three products, ferrous, non-ferrous and plastic bottles, are collected on a separate conveyor and sent as RDF material to a shuttle conveyor which deposits the RDF into seven different storage bays below.
“This conveyor has an intelligent sensor system which can detect the height of material deposited in each bay to maximise the storage capability, before moving on to the next. All of the RDF material is then loaded by shovel into wagons that will take the RDF for thermal treatment at Dunbar Energy Recovery Facility.”
“There is high emphasis on plant throughput and efficiency, whilst also achieving pre-determined recovery and purity rates of the recyclable material”.
Air and odour extraction:
A key element for the whole system has been the inclusion of an air extraction system which has been installed by Schultz and Berger.
Extraction has been installed within each hall and around individual equipment, all of which link into one main extraction system. Each extraction system has its own dust filter and carbon filter to remove solid particles and any odours within the process air with each individual hall linking up to one clean air external stack, 35m in height.
www.hub-4.com September/October 2019 - Issue 58
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