18-05-2012, 11:14 AM
Pyrolytic Heat Recovery with Enhanced Gasification
Pyrolytic Heat Recovery with Enhanced Gasification.ppt (Size: 1.69 MB / Downloads: 60)
Value Recovery Solutions for Organic Waste Disposal
Municipal Solid Waste (Landfill after resource recovery at $25 -$150/ton)
Biomass and Agricultural Wastes (Burn on Site – emissions problems)
Sewer Plant Sludge (Limited landfill availability - Landfill at $50 -$150/ton)
Medical & Hospital Waste (Hazardous Landfill at $250 - $500/ton)
Refinery & Oil Processing Wastes (Hazardous Landfill at $250- $1500/ton)
Used Tires (Hazardous Landfill, Local Nuisance, Fire Danger – equiv fuel to coal)
Food, Beverage, & Cosmetic Manufacturing Waste (Very High BOD to Sewer, Landfill Disposal at $25 - $150/ton)
Construction & Demolition Wastes (Landfill after resource recovery at $25 - $150/ton)
Why Pyrolysis ?
Incinerators generate large amounts of ash
difficult to handle
typically must be treated and disposed of as a hazardous waste.
Greater flue gas and ash cleanup
Inherently higher cost of a steam power system
net cost per ton of equivalent feed is 20-25% greater than pyrolysis
Grate efficiency of burn is at best 30% - more likely below 25%.
PHREG net efficiency is 22% of feed LHV
capital cost 20% below that of “Trash burn “ plant
eliminates ash disposal headaches.
Exhaust Gas Treatment
Separate out dust and condensable mists
Condenser
Cyclone
Scrubber
Dryer / Desiccator
Salt Recovery & Removal
Sulfur Recovery Unit
tires/refinery waste only