Method and device for purifying high-temperature smoke containing persistent organic pollutants

Abstract

The invention relates to smoke purifying technology and aims at providing a method and a device for purifying high-temperature smoke containing persistent organic pollutants. The method comprises the following steps: reducing the temperature and cooling the high-temperature smoke containing the persistent organic pollutants by a primary spray tower and a secondary spray tower which are connected in series, enabling the condensed persistent organic pollutants to enter a sedimentation tank along with spraying solution; enabling wet gas after being sprayed to enter a dehumidifier, enabling the dehumidified gas to enter multiple stages of plasma reactors which are connected in series, and degrading the residual persistent organic pollutants in the gas. According to the method, the high-temperature smoke containing the persistent organic pollutants can be processed effectively; the method is suitable for treating tail gas which is large in air volume, high in dust content and contains the persistent organic pollutants, and particularly suitable for processing tail gas generated in the process of thermal desorption of solid wastes polluted by the persistent organic pollutants, and more than 95% of persistent organic pollutant removing rate can be realized. The related device has low energy loss and water consumption, does not generate secondary pollutants easily, and is simple in structure and convenient to install and maintain.

Description

technical field [0001] The invention relates to flue gas purification treatment technology, in particular to a method and device for purifying and treating high-temperature flue gas containing persistent organic pollutants, belonging to the field of environmental protection. Background technique [0002] Persistent Organic Pollutants (POPs) refer to chemical substances synthesized by humans that can persist in the environment, accumulate through the biological food chain (net), and cause harmful effects on human health. The main POPs are dioxins. , polychlorinated biphenyls, organochlorine pesticides, hexachlorobenzene, etc. POPs are highly toxic, persistent, and easy to accumulate in organisms and carry out long-distance migration and deposition. With the public's gradual awareness of its environmental and health hazards, there is a more urgent need for economical and effective methods to deal with these toxic substances. [0003] A large amount of soil in my country has ...

AI Technical Summary

Problems solved by technology

There are two main defects in the traditional gas purification method: one is the complex structure of the purification equipment, high construction cost, high energy consumption and high operating cost, which is not economical and not conducive to the current high energy price Energy saving and emission reduction; Second, some processes have problems of low purification efficiency and easy to produce secondary pollution, which limits the scope of use and large-scale promotion of these processes

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