Multistage space-efficient electrostatic collector
AssigneeFleetguard, Inc.
InventorsGregory W. Hoverson, Scott P. Heckel
Life of this patent
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Abstract
A multistage space-efficient electrostatic collector cleans a gas flowing therethrough along a gas flow path having a first stage provided by a first corona discharge zone along the gas flow path, and a second stage provided by a second corona discharge zone along the gas flow path and spaced along the gas flow path from the first corona discharge zone. A method is provided for increasing residence time within the corona discharge zone of gas flowing through an electrostatic collector.
Claims16
A multistage space-efficient electrostatic collector for cleaning a gas flowing therethrough alone a gas flow path comprising a first stage comprising a first corona discharge zone along said gas flow path, and a second stage comprising a second corona discharge zone along said gas flow path and spaced along said gas flow path from said first corona discharge zone, and comprising a corona discharge electrode and two ground planes, said first corona discharge zone being between said corona discharge electrode and the first of said ground planes, said second corona discharge zone being between said corona discharge electrode and the second of said ground planes, wherein said second ground plane comprises a canister extending axially along an axis, and said corona discharge electrode comprises a hollow drum in said canister and extending axially along said axis, said first corona discharge zone being inside said drum, said second corona discharge zone being outside said drum.
A multistage space-efficient electrostatic collector for cleaning a gas flowing therethrough along a gas flow path comprising a first stage comprising a first corona discharge zone along said gas flow path, and a second stage comprising a second corona discharge zone along said gas flow path and spaced along said gas flow path from said first corona discharge zone, and comprising a corona discharge electrode and two ground planes, said first corona discharge zone being between said corona discharge electrode and the first of said ground planes, said second corona discharge zone being between said corona discharge electrode and the second of said ground planes, wherein each of said corona discharge electrode and said second ground plane is annular, and each of said first and second corona discharge zones is an annulus.
A multistage space-efficient electrostatic collector for cleaning a gas flowing therethrough along a gas flow path comprising a first stage comprising a first corona discharge zone along said gas flow path, and a second stage comprising a second corona discharge zone along said gas flow path and spaced along said gas flow path from said first corona discharge zone, wherein said gas flow path comprises an initial gas flow zone directing gas flow therethrough prior to gas flow through said first corona discharge zone, wherein said gas flow path is a serpentine path comprising said initial gas flow zone, said first corona discharge zone and said second corona discharge zone, wherein said gas flow path comprises a first flow reversal zone between said initial gas flow zone and said first corona discharge zone, and a second flow reversal zone between said first corona discharge zone and said second corona discharge zone.
An electrostatic collector comprising a canister extending axially along an axis between an inlet end and an outlet end and having an inwardly facing inner wall providing a first collector electrode, a corona discharge electrode in said canister comprising a hollow drum extending axially along said axis and having a plurality of corona discharge elements, said drum having an outer wall facing said inner wall of said canister and defining an outer annular flow passage therebetween, said drum having an inner wall defining a hollow interior, a hollow tubular post extending from said inlet end of said canister axially into said canister and axially into said hollow interior wall of said drum, said post having an outer wall facing said inner wall of said drum and defining an inner annular flow passage therebetween, said outer wall of said post providing a second collector electrode, said post having an inner wall defining a hollow interior providing an initial flow passage, wherein gas to be cleaned flows in a first axial direction along a first flow path segment through said initial flow passage along said hollow interior of said post, then flows in a second opposite axial direction along a second flow path segment through said inner annular flow passage along said outer wall of said post and said inner wall of said drum, then flows in said first axial direction along a third flow path segment through said outer annular flow passage along said outer wall of said drum and said inner wall of said canister.
A method for increasing residence time within a corona discharge zone of gas flowing through an electrostatic collector comprising directing gas flow along a first corona discharge path in said electrostatic collector and then directing gas flow along a second corona discharge path in said electrostatic collector, and comprising directing gas flow along an initial flow path in said electrostatic collector prior to directing gas flow along said first corona discharge path, and comprising directing gas flow in a serpentine path through said electrostatic collector comprising said initial flow path, said first corona discharge path and said second corona discharge path, and comprising performing a first flow reversal between said initial flow path and said first corona discharge path, and performing a second flow reversal between said first corona discharge path and said second corona discharge path.
Dependencies are inferred from the claim text.