PROBLEMS OCCURED DURING TEST OPERATION AND SOLUTIONS
Problems in Operating
Although the percentage of water content of the waste had been designed as 40% at
intake step and 30.9% at the front of dryer (the end of crusher) on the lowest grade basis,
the percentage of the water content of actual intake waste represented maximum 51.2%
according to seasonal factors (intake of wet waste such as fallen leaves, vegetables). It
caused overloading to the dryer, and then normal operation was impossible.
As the apparent density was increased due to intake high moist waste, the separation
efficiency of specific gravity was declined and the loss of combustibles was increased
when the organic was separated. As high moist waste was also working as an Interruption
factor of the constant operation of belt conveyor and pelletizer at the end of dryer,
pelletized RDF was crumbled because of unsatisfying with the standard which is lower
than 10% standard of the percentage of the water content and bad pelletizing. According
to the intake of the sorted inappropriate materials such as fabric and iron, the production
rate of RDF was fallen and the continuous operation was interrupted.