Regeneration and deactivation analysis of catalytical ceramic fiber filter
In order to investigate the reason of deactivation of ceramic filter and explore the regeneration effect,the deactivated ceramic fiber catalytic filter was cleaned with the cleaning agent configured with ethylenediamine tetramethylene phosphate(EDTMPS),hydroxyethylidene diphosphonic acid(HEDP),and aminotrimethylene phosphonic acid(ATMP),respectively.The denitrification activity,apparent porosity,XRF,XRD,BET,and SEM of fresh,deactivated and cleaned samples were tested and analyzed.The results showed that the denitration activity of the cleaned sample is obviously restored at(250-400)℃,the contents of K,Na and Ca in the deactivated catalytic filter tube were reduced after cleaning,most of the dust covered the surface and immersed in the fiber capillary channel were removed,and the phenomenon of agglomeration or agglomeration was weakened,the morphology of the catalyst on the fiber has been restored.However,the recovery degree of deep coverage and blockage is not ideal.The cleaning agent configured with HEDP has the best effect.To further improve the denitrification performance of the catalytic filter tube,it is necessary to supplement the catalyst.
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