Method for treating organic contaminated soil through thermal desorption

• Main Authors: SONG YIFAN, LI HONG, YIN YUECAI, ZHANG HONGLING, LI SEN, XU MINGYAN, XU SIYAO, TANG JUNJIE, CHEN GAO, ZHANG YANG
• Format: Patent
• Language: Chinese; English
• Published: 18.08.2020
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONSUMING WASTE PRODUCTS BY COMBUSTION; CREMATION FURNACES; DISPOSAL OF SOLID WASTE; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; RECLAMATION OF CONTAMINATED SOIL; RECLAMATION OF CONTAMINED SOIL SOIL; TRANSPORTING; WEAPONS

The invention relates to a method for treating organic contaminated soil through thermal desorption. The method comprises the following steps: (1) crushing, sieving and drying organic contaminated soil, sending the organic contaminated soil into a thermal desorption furnace for thermal desorption to obtain repaired soil and desorption gas, cooling the repaired soil to complete the treatment, removing dust from the desorption gas, and sending the desorption gas into a combustor for combustion; (2) feeding the high-temperature flue gas discharged from the combustor into the thermal desorption furnace as a heat source to heat the organic contaminated soil to obtain low-temperature flue gas; and (3) carrying out heat exchange between the obtained low-temperature flue gas and combustion-supporting air fed into the combustor, treating the low-temperature flue gas by a flue gas treatment system, and discharging the flue gas after the flue gas meets the standards. The energy utilization rate is increased, the soil is