公开(公告)号：US10518303B2

公开(公告)日：2019-12-31

申请号：US16096289

申请日：2018-02-06

Applicant: Korea Railroad Research Institute

Inventor： Tae Hoon Koh ,  Dong Geun Lee ,  Han Ju Yoo

IPC: F26B3/00 ,  F26B3/34 ,  B09C1/06 ,  B02C23/10 ,  F26B3/347

Abstract: Disclosed are a thermal desorption system for oil-contaminated soil and gravel, using a microwave indirect irradiation method and including a microwave emission prevention device and a preheating device using waste heat, and a thermal desorption method for oil-contaminated soil and gravel, using the same. In addition, it is disclosed that an outer tube encompassing an inner tube extends to both sides and a plurality of ring-shaped microwave attenuation units are arranged on the inner circumferential surface of the outer tube, such that microwaves are prevented from leaking between the inner tube and the outer tube, thereby enabling eco-friendliness, and even the waste heat generated during a pollutant desorption process is utilized in the system itself, thereby enabling economic feasibility to increase further.