CONTAMINATED SOIL TREATMENT SYSTEM USING DIRECT AND INDIRECT THERMAL DESORPTION

摘要

PURPOSE: A polluted soil treating system in a direct/indirect thermal desorption mode is provided to save energy by improving the workability of a polluted soil treating process and reusing exhaust gas. CONSTITUTION: A polluted soil treating system in a direct/indirect thermal desorption mode includes a thermal desorption apparatus(110). The thermal desorption apparatus includes a kiln(111), a direct heating source(112), and an indirect heating source(113). The kiln includes an inlet(111a), an outlet(111c), and treated soil discharging hole(111b). The direct heating source is arranged at the outlet of the kiln and directly heats polluted soil. The indirect heating source is arranged at the external side of the kiln and heats the kiln to indirectly heat the polluted soil. The indirect heating source receives exhaust gas and collects waste heat from the exhaust gas.