Dust extraction sock-filter unit has rotating, fluid jet, cleaning heads traversing length of tubular filter elements, internally or externally, to dislodge caked dust by causing uniform ripple deformation of element fabric

摘要

A filter arrangement has at least one tubular filtration element (3) with a cleaning head (13) which is movable along the axial length of the element and has multiple nozzles (13.3) for discharging pressurized gas or liquid. The nozzle flow causes the head to rotate around its major axis. The cleaning device may move backwards and forwards within a filtration element, or externally between, and parallel to, a group of elements.