Biomass
Canning steps up to biomass challenge
Canning Conveyor steps up to the challenge and delivers a twin conveying system for one of Scotland’s largest biomass energy plants.
A
warded a prestigious contract to supply a twin conveying system complete with towers and all steelwork as part of one of the
largest biomass energy plants in Scotland, Canning Conveyor has stepped up to the challenge and delivered a robust, efficient and reliable system for the bulk conveying of materials for the Fuel Handling System. With an overall project cost in excess of £200 million Scotland’s mega 50MWe renewable plant biomass combined heat and power plant (CHP) at Markinch in Fife, commenced build in 2010 and when fully operational in 2013 will be the largest of its kind in Scotland. The new Biomass CHP lies in the grounds
of Tullis Russell Paper Makers and will, when on-line replace their existing coal fired power plant, reinforcing the company’s position as one of the world’s leading environmentally focused papermakers. Working alongside project manager Saxlund, Canning Conveyor separately negotiated their contract for the Tullis Russell site, for the design, detail, manufacture, construction and supply of biomass reception conveyors to screens; the elevating belt conveyor system to feed three separate storage silos and the reclaim belt conveyors from the silos to the boiler feed system as part of a biomass fuel handling system for the power station.
34 March 2014 Solids and Bulk Handling
The function of the conveyor system is to receive solid fuel from the bulk material handling units and deliver it to the day storage silos, from where it conveys a measured amount of material to the boiler plant located on the same site.
The system has been designed to have two streams of conveyors that operate independently of, and run parallel to, each other and is designed to be suitable for operation with a blend of recycled and virgin wood. The conveyor system from reception to storage has a design capacity of 920m³/hr. with an operating capacity of 765m³/hr. The conveyor design rating from storage to boiler plant has a design capacity of 345m³/hr. with an operating capacity of 285m³/hr. There are four defined areas:
RECEPTION AND SCREENING AREA CONVEYORS – AREA 1
With incoming trucks depositing their load of pre-shredded recycled and virgin wood into the reception hoppers, material is deposited by mobile belt feeders (by others) onto the twin reception conveyors.
Running horizontally at ground level the 1200mm wide x 67 metres long troughed belt conveyors are designed to accept up to 975cu.m/hr of incoming material with a bulk density of up to 500kg/cu.m, (based on the
www.solidsandbulk.co.uk
calculation of 125% of the desired 780cu.m/ hr maximum) which the feed points will allow to flow. These conveyors then elevate up via catenaries to discharge via fixed chutes which are an integral part directing material into the disc screens which remove oversize materials. Positioned above each reception conveyor are cross belt permanent magnetic separators, which have been designed for continuous removal of magnetic ferrous metal from the material being passed beneath them. Magnetic ferrous metal is attracted to the magnetic face leaving the cleaned product on the conveyor below. The ferrous material is then carried by the continuously moving belts on the magnetic separators and discharged to the front of the machines, via fixed integral non-magnetic chutes, into a ferrous metal collection skip.
INCLINED TRANSFER BELT CONVEYORS – AREA 2
From the disc screens material is conveyed by the twin inclined transfer belt conveyors. These are troughed belt conveyors which utilise a totally enclosed air supported belt system with disc type
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