|
U.S. EPA Superfund Innovative Technology
Evaluation (SITE) Program
The ECO Logic Thermal Desorption Unit
ELI ECO Logic International, Inc.
This document is available in the Adobe Acrobat PDF
Format.
Click here for information
about Portable Document File (PDF) Formats.
or
Click here
to directly download the Acrobat Reader.
(To view the PDF, it is recommended that you
use the latest version of Acrobat Reader.)
U.S. EPA Superfund Innovative Technology Evaluation
(SITE) Program The ECO Logic Thermal Desorption Unit ELI ECO Logic International,
Inc. (779KB)
ABSTRACT
ELI ECO Logic International, Inc.'s Thermal Desorption Unit (TDU) is specifically
designed for use with Eco Logic's Gas Phase Chemical Reduction Process. The
technology uses an externally heated bath of molten tin in a hydrogen atmosphere
to desorb hazardous organic compounds from soils and sludges. Soil inside the
TDU floats on top of the molten tin and is heated to 600 C vaporizing the water
and organic material. Decontaminated soil is removed from the tin bath into
a water-filled quench tank which provides a gas seal between the TDU's hydrogen
atmosphere and outside air. Vaporized chemicals are drawn into Eco Logic's proprietary
gas-phase reduction reactor where the organic contaminants undergo gas-phase
chemical reduction reactions with hydrogen at elevated temperatures and pressures.
The TDU is applicable for the treatment of soils and sludges contaminated with
polychlorinated biphenyls (PCBs), polynuclear aromatic hydrocarbons, chlorinated
dioxins and dibenzofurans, chlorinated solvents, chlorobenzenes, and chlorophenols.
When used in conjunction with the gas-phase reduction reactor the system is
suited for wastes with high water content since water is a good source of hydrogen.
The technology was demonstrated at the Middleground Landfill, Bay City, Michigan,
during November and December 1992. Soil containing ~1,000 ppm PCB was fed at
180-55 lb/hr and destruction and removal efficiencies of 99.9999% were achieved
for polychlorinated biphenyls with concentrations in clean soil ranging from
8-30 ppm.
Posted March 30, 2000
|