Dust filter

Abstract

Abstract A dust filter having a housing that is divided by a horizontal partition into an upper clean gas plenum and a lower contaminated gas plenum. A circumferentially extending plurality of vertical, parallel cells are located in the lower plenum and their upper ends open through the partition into the clean gas plenum. The lower ends of the cells are closed and each contains one or more filter bags which have closed tops and lower ends which open through the closed ends of the cells to the lower contaminated gas plenum. At the lower end of the housing there are two concentric, spaced conical hoppers leading downwardly to dust discharge mechanism. The lower ends of the cells extend below the level of the top of the inner hopper. One or more pressurized contaminated gas ducts lead into the lower plenum. An exhaust duct equipped with a damper leads from the clean gas plenum to atmosphere. A damper actuating device located in the contaminated gas plenum is responsive to the differential between the pressure in the contaminated gas plenum and atmosphere for opening and closing the damper to maintain a substantially constant pressure in the contaminated gas plenum. A clean gas blast generator functions to deliver an impact to a pre-determined volume of clean gas including the gas in one of the cells and a measured volume of clean gas placed in communication with the cell to be cleaned. The blast passes the measured volume of clean gas through the bag or bags in the cell being cleaned for expelling accumulated dust from the cell downwardly into the annular space between the hoppers.

Inventors

• 👤 R Anderson

Bibliographic Details