B - Operations – Transporting – 03 – C
Patent
B - Operations, Transporting
03
C
183/38
B03C 3/41 (2006.01) B03C 3/36 (2006.01) B03C 3/38 (2006.01)
Patent
CA 1083497
ABSTRACT OF THE DISCLOSURE An improved electrode assembly for a high-in- tensity ionizer array utilized as the first stage in a two- stage electrostatic precipitator. Each ionizer unit employs a pair of co-axial electrodes to create a high-intensity electric field across the path of a particulate-laden gas stream. As the gas passes through the field it is intensely ionized and the particulate becomes highly charged. The ionizer anode comprises a venturi diffuser through which the gas stream flows immediately prior to entry into a preci- pitator stage which removes the charged particles. The ionizer cathode is a disk co-axially mounted within the venturi throat and having an arcuate periphery. A high voltage power supply connected between the anode and cathode establishes a high-intensity corona discharge in the annular region formed between the periphery of the cathode disk and the surrounding cylindrical anode surface. The section of the venturi wall in the area of the cathode disk is formed with a series of axially spaced conical vanes. The spaces between adjacent vanes define annular injection nozzles which are oriented to direct clean gas supplied under pressure from an external source into a venturi charging region and along the interior anode surface in a laminar flow in the direction of the primary gas stream. The laminar film of clean gas sweeping along the venturi wall envelopes the primary gas stream and provides an effective barrier to particle deposition on the anode surface.
286539
Electric Power Research Institute
Fetherstonhaugh & Co.
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