Making Our World Beautiful Again
Thermal Desorption
WRT uses thermal desorption technology to thermally treat, or remediate petroleumcontaminated soil (PCS).
The thermal desorption process involves the heating the petroleum contaminated soil to a temperature sufficient to volatilize the entrained petroleum contaminates. The volatilized are captured in a process air then routed into the air pollution control equipment for destruction. While exiting the treatment plant, the remediated soil is hydrated and cooled on a mixer conveyor prior to re-stockpiling.
Our thermal remediation unit requires an area of approximately 100 feet by 50feet and has a design processing capacity of 50 tons per hour. The entire unit consists of 4 main components: a feed system and rotary dryer, the air pollution control equipment, a control house, and the soil discharge system.
The PCS is continuously delivered to the feed system, which maintains a constant flow of PCS to the rotary dryer. Operating temperatures within the rotary dryer are maintained at 500 to 700 degrees Fahrenheit to ensure hydrocarbon volatilization. As the PCS hydrocarbons are volatilized into the process air stream, they are expelled through a flue to the air pollution control equipment. These process gasses then enter the baghouse for particulate removal then the air stream is duct into the thermal oxidizer where they are heated to a minimum temperature of 1400 degrees. At this high temperature the volatized hydrocarbons are oxidized and destroyed. All collected particulate material is augured back into the soil discharge system where it is blended with the remediated soil for re-hydration and final discharge. Located at the rear of the rotary dryer, the soil discharge system provides for the re-hydration and cooling of the heated soil. A mixer screw conveyor transports the treated soil to the stacker belt conveyor for re-stockpiling.