Device at a dust filter

Patent · Tue Apr 17 04:00:00 EST 1984

OSTI ID:6457430

Carlsson, K B.I.

This invention relates to a device at a dust filter for cleaning a gas flow from dust. The dust filter consists of an electrostatic precipitator or fabric filter (bag filter) and comprises a filter chamber with gas inlet and gas outlet. At the gas inlet a precollector in the form of a louvre collector is located for separating coarse dust, i.e., dust with a diameter exceeding 50-75 microns. In the order to obtain good collection at the louvre collector, the collected dust is evacuated by means of a partial gas flow, which is passed to a dust hopper and a dust discharge unit. According to the invention, the dust discharge unit comprises a cyclone collector, the inlet portion of which is integrated with the dust hopper, and the outlet portion of which or central pipe is formed with a passageway, the mouth of which is located in the filter chamber downstream the louvre collector. The cyclone collector is dimensioned so that the pressure drop over the louvre collector amounting dimensioned so that the pressure drop over the louvre collector amounting to between 0.0015 and 0.0030 atm is sufficient to drive the partial gas flow through the cyclone collector, which may be an axial cyclone or a tangential cyclone.

• Assignee: Flakt Aktiebolag, Nacka (Sweden)
• Patent Number(s): US 4443234
• OSTI ID: 6457430
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
DESIGN
DUST COLLECTORS
ELECTROSTATICS
FABRIC FILTERS
FILTERS
FILTRATION
GASEOUS WASTES
PRECIPITATION
SEPARATION PROCESSES
WASTES