Engineering Technology

TECHNOLOGY:
Apparatus and Method for Improved Pulse-Jet Cleaning of Industrial Filters

DESCRIPTION:
This invention provides a method for adapting the most efficient form of cleaning felted industrial filter bags to square or rectangular arrays of arbitrary size (the preferable way for configuring pulse-jet cleaned baghouses).

Virtually all pulse-cleaned baghouses utilize high-pressure low-volume (HPLV) or intermediate-pressure intermediate-volume (IPIV) cleaning, both of which frequently require a dedicated air compressor. Field experiments (some conducted by Southern Research) have generally shown that low-pressure high-volume (LPHV) cleaning is superior to the other two forms of pulse cleaning. However, because a blower is required to supply the relatively large volume of air utilized in this form of cleaning, it has been generally conceded that many blowers would be required to apply this form of cleaning to bags in a square or rectangular array, or to multiple compartments of bags. For large installations, this is not an economical or practical approach.

Due to this limitation, LPHV cleaning has only been applied to circular arrays of bags located below a rotating arm through which cleaning pulses are directed, a complex, space-inefficient approach. Further, because of the way bags must be distributed beneath the arm, it is not possible to clean every bag directly below the arm during any one pulse. With multiple passes of the arm and with pulse timing set so that pulses are not directed at the same point on each rotation, statistically (over some period of time) almost every bag will be pulsed. However, most bags are not directly pulsed - that is, a pulse of air is not directed down through the center of the bag and the overall efficiency of cleaning is greatly reduced.

This invention completely removes the restriction of circular symmetry while improving the efficiency of cleaning by allowing each bag to be directly pulsed. This leads to fewer cleanings (because of direct pulsing) and increased bag life (because fewer cleanings are required). Recent developments (in process) have resulted in further improvements in this invention.

PATENT PROTECTION: US Patent 6,309,447

REFERENCE NUMBER: S0235

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