Patent ID: 9616371
Date: 2017-04-11
CPC Classifications: B01D

Claim:
1. A high efficiency, filter cartridge to be removably, but sealingly installed in a uniform hole of the tube sheet for a pulse-jet baghouse, said filter cartridge comprising in combination: an elongate, perforated support conduit having a uniform cross section to provide an internal filter bore and further having first and second ends; a pleated filter sleeve geometrically circumscribing said support conduit and having first and second ends; a bottom end cap secured to said second ends of said support conduit and filter sleeve to sealingly close said second ends; a molded, open mouth top fitting secured to said first ends of said support conduit and filter sleeve, said top fitting having an upper flange configured and sized such that a portion of said flange overlies the tube sheet adjacent said hole therein, said top fitting having a side wall integrally formed with said upper flange to extend downwardly therefrom and being configured and sized to fit through said hole of the tube sheet in which said filter cartridge is installed, and said top fitting having a stepped portion integrally formed with said side wall leading to said filter bore; a molded, flow transition insert having upper and lower ends received within said open mouth top fitting and having an exterior side surface contacting said side wall of said top fitting, said insert interiorly having a flared open mouth at said upper end thereof with a rounded shoulder transitioning to a throat bore configured and sized at the lower end thereof to substantially correspond to said filter bore; and an air passageway established between said flow transition insert and said top fitting from above said upper flange to said filter bore; whereby said exterior surface of said insert contacting said side wall of said top fitting urges said side wall outwardly in sealing engagement with said hole of the tube sheet, and said air passageway supplies tertiary air flow to said filter bore during a cleaning cycle with high pressure primary air and induced secondary air delivered to said flared open mouth of said insert.