Contaminated soil thermal decomposition tail gas treatment method

Abstract

The invention discloses a contaminated soil thermal decomposition tail gas treatment method. The contaminated soil thermal decomposition tail gas treatment method comprises the steps of dust removal treatment, catalytic combustion, cooling treatment and absorption treatment, wherein according to the catalytic combustion, tail gas without particles is fed into a catalytic combustion chamber to be subjected to catalytic combustion, the combustion process is a process with catalytic combustion through catalysts, the temperature of catalytic combustion ranges from 200 DEG C to 600 DEG C, and the time of catalytic combustion is two seconds or longer. Compared with an existing tail gas high-temperature incineration method, the contaminated soil thermal decomposition tail gas treatment method has the advantages that due to the fact that the tail gas is treated with a catalytic combustion method, the damage and removal rate of organic pollutants is more than 99%, and the tail gas is treated efficiently, safely and effectively; due to the fact that tail gas treatment is carried out at low temperature, energy consumed in the tail gas treatment process is about only half of the energy consumed in high-temperature incineration, the treatment cost of thermal decomposition is remarkably reduced, and the contaminated soil thermal decomposition technology can be widely applied easily.

Description

technical field [0001] The invention relates to the technical field of contaminated soil remediation, in particular to a method for treating contaminated soil thermal analysis tail gas. Background technique [0002] As a kind of contaminated soil remediation technology, thermal analysis has developed rapidly in recent years because of its effectiveness in the treatment of organic-contaminated soil. reports. [0003] Thermal desorption means that by heating the polluted soil, the polluted soil is heated to a sufficient temperature, and the pollutants are volatilized and separated from the soil, so that the soil can be purified. Thermal desorption is suitable for the treatment of soil contaminated by volatile or semi-volatile organic compounds. It has the characteristics of high treatment efficiency, no secondary pollution, and usable soil after remediation. However, it also has the problems of high energy consumption and high treatment cost. Generally, the thermal desorptio...

AI Technical Summary

Problems solved by technology

Thermal desorption is suitable for the treatment of soil contaminated by volatile or semi-volatile organic compounds. It has the characteristics of high treatment efficiency, no secondary pollution, and usable soil after remediation, but there are also problems of high energy consumption and high treatment cost.