Soil restoration tail gas purifying technology with adsorbing and degrading functions

Abstract

The invention discloses a soil restoration tail gas purifying technology with adsorbing and degrading functions. The soil restoration tail gas purifying technology comprises the following steps of physical adsorbing; photocatalytic degrading: using a liquid-phase heat spraying method to prepare a namometer TiO2 (titanium dioxide) coating layer on a substrate, directly decomposing pollutants in air into carbon dioxide and water, destroying cell walls of bacteria, killing the bacteria, and decomposing hyphal network thalli, so as to remove most of pollutants in the tail gas, and effectively purify the multiple types of pollution gases; monitoring: utilizing a gas monitoring method to monitor the gas quality in real time, and adjust the physical adsorbing parameters and photocatalytic degrading parameters. The soil restoration tail gas purifying technology with the adsorbing and degrading functions has the advantages that by utilizing the advantages of multiple air purifying techniques of physical adsorbing and photocatalytic degrading, the tail gas purifying effect is obvious; the nanometer TiO2 coating layer in the core part is prepared by the liquid-phase heat spraying method, so as to effectively purify the multiple types of pollution gases.

Description

technical field [0001] The invention relates to the field of soil remediation tail gas purification, in particular to a soil remediation tail gas purification process with both adsorption and degradation functions. Background technique [0002] In recent years, the problem of soil pollution in the world has become increasingly prominent, especially in developing countries, posing a serious threat to the ecological environment, food safety and human health. Among them, soil pollution caused by heavy metal pollutants such as mercury, cadmium, lead, chromium and arsenic is particularly prominent. According to the "China Environmental Yearbook" (2002-2009), from 2001 to 2008, the number of closed and transferred enterprises in my country increased rapidly from 6,611 to 22,488, with a growth rate of 1,984 per year, and the total number reached more than 100,000. There are about 25,000 a year. Due to the shutdown and relocation, there are now a large number of industrial site sit...

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Problems solved by technology

[0004] There is a huge potential market demand for the remediation of urban industrial polluted sites in my country. However, the remediation technology and engineering application for polluted sites in my country have just started, and the development of remediation technologies suitable for my country's national conditions and cost-effective is still in its infancy.

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