Improvements to coal transport methods and associated site reception and handling facilities for the industrial user
A comprehensive coal handling system is described which aims to encourage industrial use of coal by making its transportation, reception, storage and handling more automated, cost effective and environmentally acceptable. Coal is received into a 22 tonne tipper hopper and is stored in silos. Transfer to the boiler feed hoppers is by a dense-phase pneumatic conveyor. There is an alternative reception system for containerised coal, which is working reliably. Another system based on a wide belt lorry unloader and integrated lean-phase pneumatic conveyor allows rapid turn-round of tipping vehicles. Investigations of long term storage of smalls coal show that the temperature rose to 30 C above ambient during the first six months. Carbon monoxide concentrations in the silo headspace underwent considerable daily variation, making it difficult to detect dangerous self-heating. Reports of high methane concentrations gave rise to concern. Cyclic pressures from the rotating auger used for extraction of coal from the base of the concrete stave-silo may be a contributory cause of cracking of silo walls. A hydraulic system for removing oversized ash from a fluidised bed by means of an air classifier has been tested. A low-cost, submerged, rubber belt wet ash extraction system has been operated successfully during a 9-month trial.
Bibliographic Reference: EUR 11749 EN (1989) MF, 86 pp., ECU 4, blow-up copy ECU 11.25
Record Number: 198911135 / Last updated on: 1994-12-01
Original language: en
Available languages: en