Treatment system for substances containing persistent organofluorine compounds and method for treating substances containing persistent organofluorine compounds

The pollutant treatment system addresses the challenge of hydrogen fluoride and dioxin removal by using a wet recovery device and secondary combustion furnace with volume adjustment and reactants, achieving effective and safe disposal of persistent organofluorine compounds.

JP7894855B2Active Publication Date: 2026-07-24MAEDA CORP
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Patent Information

Application Number
JP2023511183
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-03-30
Filing Date
2022-03-25
Publication Date
2026-07-24
Estimated Expiration
2042-03-25

AI Technical Summary

Technical Problem

Existing systems fail to effectively remove hydrogen fluoride and dioxins from exhaust gases during the thermal decomposition of persistent organofluorine compounds, leading to environmental pollution and equipment corrosion, with limited processing capacity and short equipment lifespan.

Method used

A pollutant treatment system that includes a wet recovery device to recover hydrogen fluoride and dioxins by contacting high-temperature exhaust gas with liquid water, combined with a secondary combustion furnace that can adjust its volume and the use of reactants to form metal fluoride salts, along with an auxiliary recovery device to further purify the exhaust gas.

Benefits of technology

The system effectively suppresses the release of dioxins and hydrogen fluoride into the environment, extends equipment lifespan, and ensures safe disposal of pollutants by almost complete recovery of these harmful compounds, while maintaining low operational costs.

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Abstract

A pollutant treatment system (1) comprises: a heating furnace (2) which pyrolyzes pollutants; and a wet recovery device (4) which brings high-temperature exhaust at 500 °C or higher discharged from the heating furnace (2) into contact with liquid water to recover, into the liquid water, by-products in the high-temperature exhaust and cools the high-temperature exhaust to 300 °C or lower.
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Citation Information

Patent Citations

  • JP1965005999B1

  • JP1974060058A

  • Prefabricated panel heating furnace

    JP1984080693U

  • Decomposition of organohalogen compound

    JP1997085048A

  • Method and device for decomposing fluorocarbon

    JP1998094716A