BAG HOUSE CLEANING SYSTEM

摘要

A reverse pulse cleaning system for use in a bag house filter including a bl ow tube (2) having outlet holes (3) to direct high velocity air pulses into filter bags to be cleaned. The system includes a nozzle (1) which may be an assemblage of parts, which has a contr ol formation at or in between an inlet or outlet of the nozzle. The control formation determine s the characteristics such as velocity and direction of the flow emergent from the outlet holes (3 ) and can improve uniformity and effectiveness of filter bag cleaning. A clampable and releasable fixing of the nozzle (1) to the blow tube allows replacement of the control formation with one of different characteristics during manufacturing or in situ fine tuning. The fixing allo ws precise alignment of nozzles (1) on assembly which reduces the need for costly precision in formi ng the blow tube outlet holes (3). The system may include a tube (9) forming part of the nozz le with adjustable radial holes (13) to induce secondary air into the cleaning flow and may include a venturi (10) to induce tertiary air.