Nanjing Tech University

Cssc Nanjing Luzhou Environment Protection Co., Ltd.

Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment

Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China

Nanjing Institute of Environmental Sciences

Yongxian Zhou

Xiang Ling

Haitao Xu

Shengtian Zhang

Jisai Chen

Sun Hu

Haiyan Qin

Xiaofeng Wang

Qinrui Wu

Hongqi Wang

Yongliang Zhang

The present invention discloses a soil remediation device and method. Soil is remediated by (i) introducing hot air at 550-650° C. from an outlet of an air heater into the drum from a circulating hot air inlet of a discharge end fixed hood and transferring heat with the soil by direct countercurrent contact such that the soil is heated, and (ii) releasing heat from a heat accumulator at a bottom of the drum through heat pipes such that the soil is heated. As a temperature of the soil gradually rises to about 300-500° C., water and organic contaminants in the soil are volatilized into a gaseous state and carry dust to become thermal desorption offgas that is separated from the soil, the thermal desorption offgas becoming part of the hot air and flowing from the drum to a dust remover. Part of the hot air is recirculated to the drum, and another part of the hot air is discharged after being purified.

Heat pipe-enhanced heat accumulation type indirect thermal desorption-based soil remediation device and method

A medium internal circulation enhanced thermal desorption soil remediation reactor and a method thereof, and belongs to the technical field of soil remediation. Internal circulation of a thermal medium is realized through a specially designed rotary drum structure, and a way for heating soil by utilizing oxidative decomposition of organic contaminants is provided, so that the treatment efficiency of an apparatus and the contaminant removal effect are improved significantly on the premise of not increasing the scale of the apparatus, and at the same time, the energy consumption of a system is reduced.

Medium internal circulation enhanced thermal desorption soil remediation reactor and method thereof

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.

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

Growing community of inventors

Nanjing, China

Yongxian Zhou