Top inlet baghouse construction

US4648889A · kind A · utility

Inventor

• Robert M. Jensen · Tucson, US

Key dates

• Filing date: May 3, 1985
• Grant date: Mar 10, 1987
• Expiry date: May 3, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2275/203
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A baghouse dust collector for top inlet operation, having an upper tubesheet and a lower tubesheet and a hopper below the lower tubesheet for collecting dust, includes an improved top end inflow thimble for the filter bags, each thimble having a generally bell-mouthed opening at its upper end for smooth inflow of gases. The thimble merely rests on the tubesheet and extends through the opening, and is sealed against leakage of unfiltered gases by a gasket. The filter bag is connected releaseably to the downwardly depending portion of the thimble, with the bag positioned over the exterior of the thimble. A connection at the bottom end of the bag releaseably retains the bottom end of the bag to the lower tubesheet at an opening, with provision for sealing against leakage of gases. A tensioning device at the lower end of the bag is used to apply tension to the bag from a position above the lower tubesheet. A special bottom-end connection may be used for maintaining tension in the bag, with a thimble collar providing adjustment of clamping position for achieving the proper tensioning. Preferably, the bag is tensioned using temporary deadweight tension.