Last Wednesday, Worldwide Recycling Equipment Sales, LLC shipped the final component of an Indirect Fire Thermal Desorption System with Vapor Recovery Unit, a 70’ rotary kiln, to Brazil. Over the past seven months, WWR manufacturing professionals have assembled the entire system and customized it to meet the client’s intended application. The kiln traveled by truck to the port in Texas where it is waiting to be loaded onto a ship that will take it the rest of the way to Brazil. The other components of the system, including the feed system and vapor recovery unit, were freighted down earlier in the week and are currently on a ship to Brazil.
A thermal desorption system is a key piece of equipment in the soil and environmental remediation industry. The system is designed for processing various types of contaminated soil by removing and separating it from contaminants such as oil, gasoline and VOC’s. In soil remediation, the system evaporates the volatile compounds in the soil through an indirectly heated kiln in an anaerobic atmosphere. The rotating kiln heats the soil to a temperature high enough to vaporize the contaminants, but not so high that the soil is incinerated. This results in newly-cleaned soil that can be recycled back into the environment to be reused, rather than being landfilled or incinerated.
The vapor recovery unit features a series of scrubbers, cooling chamber, dust collector, thermal oxidizer and oil/water separator. The vapor recovery system cools and condenses hydrocarbons to recapture oil, as well as purifies the dust and vapor particles so that they can be safely recycled back into the environment. The dust collector acts as an air pollution control device by filtering and heating the dust and dirt to a temperature high enough to destroy all of the contaminants. The soil is recycled and the vapors are passed into the oxidizing chamber that heats them to extremely high temperatures in order to decompose the gas, allowing the device to destroy hazardous air pollutants, break down hydrocarbon-based pollutants and restore the chemical makeup of the gas to CO2 and H2O before discharging it. The heat generated in the thermal oxidizer is also used as a secondary heat source to the system, saving the amount of fuel required for operating. The oil/water separator filters free, non-emulsified oil, hydrocarbons, diesel, gasoline and fuels from water through gravity separation of the fluids in which the less dense oil rises to the surface of the water and can be easily extracted. This process reduces the amount of oil and petroleum-contaminated water released into the environment and purifies water for reuse.