Method and system for processing wastes of halogenated POPs (Persistent Organic Pollutants)

Abstract

The invention provides a method and a system for processing wastes of halogenated POPs (Persistent Organic Pollutants). The method comprises the steps of adding catalysts into the wastes of the POPs, wherein the catalysts are alkali metal oxides and / or alkaline earth metal oxides; performing dehalogenation for 0.5-5 hours at the temperature of 250-600 DEG C under an atmosphere condition that the content of oxygen in the environment is less than or equal to 1%; and cooling the wastes after dehalogenation under an anoxic atmosphere condition, and cooling the wastes to below 150 DEG C, thus finishing treatment of the wastes. Meanwhile, the invention also provides a method for implementing the method. Through the technical scheme of the method and the system, the wastes of the halogenated POPs can be effectively subjected to dehalogenation, processing efficiency is good, the processing process is easily-controllable, the cost is low, and the method and the system are applicable to treatment of the wastes of the industrial POPs.

Description

technical field [0001] The invention relates to organic pollutant treatment technology, in particular to a treatment method and system for halogenated POPs waste. Background technique [0002] Persistent organic pollutants (Persistent Organic Pollutants, POPs) are a class of organic pollutants with long-term persistence, bioaccumulation and high degree of Serious hazards to human health and the environment. Among them, polychlorinated biphenyls (PCBs) are the most representative type of artificially synthesized POPs, which are widely used as insulating oil for power capacitors and pressure transmission media for hydraulic systems. The presence of a large number of PCBs; in addition, other halogenated POPs also exist in large quantities, such as PFOS and its salts, dioxins, PCBs, chlorobenzenes, chlorophenols, polybrominated diphenyl ethers, tetrabromobis Phenol A, pesticides, herbicides, etc., are all organic pollutants containing halogens, which are also commonly referred...

AI Technical Summary

Problems solved by technology

However, in this treatment method, since the chlorine ions in the pollutants are ubiquitous, while the POPs waste is incinerated, in the low-temperature area after combustion, the chloride ions may combine with other pollutants or organic matter to form organic chlorides, Then generate dioxins or other halogenated POPs, which are difficult to control and manage during the incineration process

High-temperature heat treatment equipment requires large investment, high energy consumption, and high operating costs, making it difficult to widely apply it in my country

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