Determination of Dust Load in a Bag Filter

Abstract

A bag filter system for removing dust from a gas flow comprises a plurality of filter bags (41, 42), wherein each individual filter bag is supported by a metal cage (2, 3). The bag filter system is configured to determine an amount of dust (21) accumulated on surfaces of filter bags. Impedance-measuring equipment (43) is connected to the metal cages of at least two adjacent filter bags to determine an impedance value between the cages of the at least two adjacent bags. Since the determined impedance value is indicative of the amount of dust accumulated on the surfaces of the adjacent bags, it can be used for deciding when it is appropriate to initiate a cleaning process of these bags. In this way, it is ensured that bags are only cleaned when needed, and savings on compressed cleaning air as well as an extension of bag life can be achieved.

Dependencies are inferred from the claim text.