A new sludge processing facility in Southern California produces cement kiln fuel from waste sludge, a renewable source of energy. The dryer exhaust contains ammonia, particulate, sulfur compounds, and water vapor. The Envitech dryer condenser drops out the water vapor and captures the pollutants, enabling the plant to meet tough California regulatory requirements for SOx, NOx, and particulate. By removing the water vapor, the majority of the exhaust can be recycled to the dryer. This allows the downstream RTO to be smaller, resulting in both capital and operating cost savings.
The Envitech dryer condenser is a combination of air pollution control system components, including a quencher, condenser/absorber tower, Venturi scrubber, and entrainment separator. Simultaneous condensing of water vapor and pollutant removal enables the exhaust to be recycled to the dryer while at the same time enabling the plant to meet tough California regulatory requirements for SOx, NOx and particulate.