Hot air circulation type indirect thermal desorption-based soil remediation system and method

US11697142B2 · kind B2 · utility

Assignees

• CSSC NANJING LUZHOU ENVIRONMENT PROTECTION CO., LTD. · CN
• NANJING TECH UNIVERSITY · CN
• NANJING INSTITUTE OF ENVIRONMENTAL SCIENCES, MINISTRY OF ECOLOGY AND ENVIRONMENT · CN

Inventors

• Yongxian Zhou · Nanjing, CN
• Jisai Chen · Nanjing, CN
• Haitao Xu · Hubei, CN
• Shengtian Zhang · Nanjing, CN
• Hongqi Wang · Nanhu, CN
• Qinrui Wu · Nanjing, CN
• Yongliang Zhang · Beijing, CN
• Xiang Ling · Nanjing, CN

Key dates

• Filing date: Dec 8, 2021
• Grant date: Jul 11, 2023
• Expiry date: Dec 8, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B09C1/065
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A hot air circulation type indirect thermal desorption-based soil remediation system and method, belonging to the technical field of soil remediation. The system includes a thermal desorption reactor, a dust remover, a hot air circulating fan, a hot air heater, an air preheater, a combustion fan and a combustion device. By using thermal desorption gas generated by soil being heated and volatilized as a heat transfer medium and by a circular heating manner, hot air efficiently transfers heat to the soil by contact, and the high-temperature fume is kept from direct contact with the soil, so the system has the advantages of high treatment capacity, small equipment scale and the like.