Description of the CWTC
Incineration
The incineration system consists of waste storage/blending and an incineration train. It is used for the destruction of organic materials and cyanide wastes. Chemical wastes received at the CWTC which require incineration are stored in tanks according to their chemical make-ups. The wastes are blended to ensure the proper feed to the incinerator.
The incineration train is comprised of a Rotary Kiln, a Secondary Combustion Chamber, a Waste Heat Recovery Boiler and an Air Pollution Control System. The incinerator is designed to handle liquids and sludges form the blend tanks and solids in burnable containers. The Kiln and the Secondary Combustion Chamber operate above 850 and above 1000 degrees Celsius respectively. When wastes of special hazardous nature (such as Polychlorinated Biphenyls-containing) are incinerated, the Secondary Combustion Chamber will be operated at above 1100 degrees Celsius. The combustion energy is recovered in the Waste Heat boiler in the form of steam, which is used as a heating medium throughout the centre. Contaminants that remain in the gas phase after the Waste Heat Boiler is removed in the spray dry absorber and fabric filter baghouses. The air at the stack is continuously monitored to ensure stringent emission requirements are met. The incinerator ash and scrubber solids are sent to the stabilisation system for treatment prior to off-site disposal.
Chemical Waste Treatment Centre
