Abstract
The stopping power of granular filters from metal powders in the purification of water and nitric acid solutions from mechanical contaminants is comparable to that of sintered P/M filters. A protective layer from a coarser spherical powder fraction located under a fine purification layer improves the latter's hydraulic characteristics and increases its debris holding capacity. The coefficient of effectiveness of regeneration of such a filter by 90-sec flow reversal is equal to 0.98 and is virtually unaffected by the number of regeneration cycles.
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