Original Articles
Jingang Wang, Gang Wei, Junlon
Abstract
The recycling of SF6 molecular sieve adsorbent used in high-voltage electrical equipment has favorable economic, social and environmental benefits in power sector. In this study, the methods for regeneration of SF6 molecular sieve adsorbent were analyzed, proposing that heat treatment is the most economic and effective method, and the regenerating principles were illustrated. Moreover, experiment on heat treatment was made, by combining with infrared spectroscopy to analyze the change of content of the harmful elements in adsorbents, focusing on determination of the temperature and duration of regeneration by heat treatment of SF6 molecular sieve adsorbent and conducting adsorption isothermal curve test and verification to confirm the desorption capacity of the recycled SF6 molecular sieve adsorbent. The experiment shows that for the KDHF-03-type molecular sieve adsorbent, which undergone heat treatment at temperature of 200℃ below for 2 hours, 50%-60% of the harmful decomposed gaseous products was removed, and its adsorption capacity was restored to 60% of the original.