Treatment method of heat-treatment tail gas containing brominated flame retardant material

Abstract

The invention relates to a treatment method of a heat-treatment tail gas containing a brominated flame retardant material. The method comprises the following steps: heating a reactor and fusing the fused salt in the reactor; diluting the heat-treatment tail gas containing the brominated flame retardant material by utilizing air or oxygen; adjusting the gas intake volume concentration to reach 30% to 90%; and continuously leading the mixed gas into the reactor under the speed rate of 0.1L / min to 0.5L / min. After the reaction is finished, the destruction removal rate of the harmful component in the discharged tail gas can reach 80% to 100%. In the reactor, peroxy ions O2<2->, superoxy ions O<2-> and the like, which are generated by the reaction between the high-temperature fused salt and oxygen, can quickly destroy the brominated organic matter in the tail gas, thereby generating CO2, H2O, NaBr and the like without dioxin and other by-products. The method has the advantages of being rapid and complete in reaction, free of secondary pollution, easy to operate and the like.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for treating exhaust gas from heat treatment of materials containing brominated flame retardants. Background technique [0002] At present, the global consumption of flame retardants is about 2 million tons, of which 65-70% are used in flame retardant plastics. Flame-retardant plastics usually use polybrominated diphenyl ethers (PBDEs), polybrominated biphenyls (PBB) and tetrabromobisphenol A (TBBA) as flame retardants, and are widely used in printed circuit boards, plastics, coatings, wires and cables, and resin electronics. element. At present, my country has entered the peak period of household appliance scrapping, with more than 50 million sets being scrapped each year, and the scrapping amount has increased by 20% annually. The dismantling process of waste electronic and electrical products produces a large amount of materials containing brominate...

AI Technical Summary

Problems solved by technology

Dehalogenated plastics can be used as raw materials for recycled products, and halogens can also be recycled, but this technology requires high equipment, long separation time, and operating costs are an important factor affecting the practicality of this technology

Compared with integral dehalogenation, adding alkali or basic oxides for dehalogenation in the cracking and incineration process of plastics has a better ability to remove acidic components, but the addition of alkaline components will affect the recovered metals. , glass fiber and other materials cause a certain degree of damage, which is not conducive to the subsequent treatment of pyrolysis residues

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