Self-Oscillating Nozzle and Pulse-Aided Back-Flushing Ash Cleaning Apparatus of Filter Equipped with Self-Oscillating Nozzle

摘要

The present invention relates to a pulse-jet cleaning device for filter with a self-oscillating nozzle, in which a tube sheet of the filter is provided with a filtration unit thereon, with a cleaning gas chamber above the tube sheet and a dust-containing gas chamber under the tube sheet; and the pulse jet cleaning device includes an ejector and a back-flushing pipeline, with one end of the back-flushing pipeline connected to a back-flushing gas tank through a pulse back-flushing valve, the other end of the back-flushing pipeline being provided with a self-oscillating nozzle corresponding to the top portion of the ejector; and the self-oscillating nozzle includes a hollow cylindrical self oscillating chamber, which has a gas inlet at an upper end connected to the back-flushing pipeline and a gas outlet at a lower end.

主权项

1. A pulse-jet cleaning device for filter with a self-oscillating nozzle, wherein a tube sheet of the filter is provided with a filtration unit which consists of at least one filtration element, the tube sheet hermetically divides the filter into a cleaning gas chamber in an upper portion and a dust-containing gas chamber in a lower portion, and the pulse-jet cleaning device comprises an ejector provided on an upper portion of the filtration unit and a back-flushing pipeline corresponding to the ejector, with one end of the back-flushing pipeline connected to a back-flushing gas tank through a pulse back-flushing valve, wherein the other end of the back-flushing pipeline is provided with a self-oscillating nozzle corresponding to a top portion of the ejector, and the self-oscillating nozzle comprises a hollow cylindrical self-oscillating chamber, which has a gas inlet at an upper end connected to the back-flushing pipeline and a gas outlet at a lower end, wherein an oscillating frequency regulating part, with a shuttle shape of two pointed ends and a wide middle portion, and with a smooth external transition surface, is suspended in the axial direction in the self-oscillating chamber corresponding to the gas inlet and gas outlet.