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Document IIF

Le filtre à glace : une approche unique pour les émissions de composés organiques volatils.

The ice filter: a unique approach to volatile organic compound emissions.

Auteurs : WILLIAMS S., TREMBLEY J.

Résumé

A novel cryogenic recovery process for the removal of volatile organic compounds (VOCs) from process gas streams has been developed. This technique of air pollution control allows for continuous solvent recovery in one apparatus with the use of liquid nitrogen. Due to legislative requirements operating temperatures of -100 °C or below are required for environmental compliance, however operation at this low temperature nearly always necessitates the freezing of solvent VOCs. Current processes in operation maintain continuous operation with the use of dual equipment operating with freeze-thaw cycles, this new process operates by continuous freezing and removal in one step operation. VOCs are frozen and removed by filtration at cryogenic temperatures. The 'ice filter' was developed for low gas flow rates (lower than 300 Nm3/hr) to achieve very low exit concentrations of VOCs (below 1 part per million in some cases) and recovery rates greater than 99.9%. Under these conditions the 'ice filter' has significant advantages over conventional cryogenic condensation, carbon adsorption and thermal oxidation technologies.

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Détails

  • Titre original : The ice filter: a unique approach to volatile organic compound emissions.
  • Identifiant de la fiche : 2005-0542
  • Langues : Anglais
  • Source : 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Date d'édition : 17/08/2003

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