Various methods of fabric filter regeneration are described together with economical comparison of reverse air flow and pulse-jet regeneration. Operational costs of pulse-jet regeneration are very high, as caused by high cost of clean, dry compressed air. These costs may exceed initial cost of the fabric filter over reasonable life expectancy of 15 years. The cost of reverse air flow regeneration, using negative pressure inside the fabric filter, is usually only about 5% of the pulse-jet operating cost.

Pulse-jet regeneration is therefore justified only in very fine, sticky dust applications. Such applications amount to only about 10% of fabric filter installations.

Published in “ Klimatizace “, No 1/98, Czech Republic