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US 4,093,430 AGranted
Apparatus for ionizing gases, electrostatically charging particles, and electrostatically charging particles or ionizing gases for removing contaminants from gas streams
AssigneeAir Pollution Systems, Inc.
InventorsJames J. Schwab, David B. Goodson
Life of this patent
Estimating the term…
Abstract
A venturi increases the velocity of contaminated gases and guides the gases past a high, extremely dense electrostatic field presented perpendicular to the gas flow and extending radially outward between a central, accurately sized disc electrode and the surface of the venturi throat. Downstream, charged particles are collected by a wet scrubbing process or electrostatic precipitator.
Claims35
An apparatus for removing contaminants from a gas, comprising:
- a tubular outer electrode adapted to conduct said gas therethrough;
- a generally planar inner electrode having a perimeter generally corresponding to the shape of said outer electrode, said inner electrode being positioned within said outer electrode and defining an electrode gap therebetween, said inner electrode having a smoothly curved peripheral surface converging outwardly from the center of said electrode when viewed in axial cross section said inner electrode being the sole corona current emitting structure within a sufficient distance from said inner electrode to allow an axial wedge-shaped expansion of the field to the outer electrode;
- means for applying a high voltage across said electrodes for creating a corona discharge high intensity electrostatic field within said electrode gap;
- means for cleaning the surface of said outer electrode;
- means for moving said gas in a stream axially through said electrode gap thereby charging contaminants in said gas;
- and
- means for collecting said charged contaminants.
4 more elements
An apparatus for ionizing a gas, comprising:
- a tubular electrode adapted to conduct said gas therethrough;
- a generally planar inner electrode having a perimeter generally corresponding to the shape of said outer electrode, said inner electrode being positioned within said outer electrode and defining an electrode gap therebetween, said inner electrode having a smoothly curved peripheral surface converging outwardly from the center of said electrode when viewed in axial cross section, said inner electrode being the sole corona current emitting structure within a sufficient distance from said inner electrode to allow an axial wedge-shaped expansion of the field to the outer electrode;
- means for applying a high voltage across said electrodes to create a corona discharge high intensity electrostatic field within said electrode gap;
- and
- means for moving said gas axially through said electrode gap thereby ionizing said gas.
2 more elements
An apparatus for charging contaminants in a contaminant laden gas, comprising:
- a tubular outer electrode adapted to conduct said gas therethrough;
- an inner electrode positioned within said outer electrode, said inner electrode including a planar member having a perimeter generally corresponding to the shape of said outer electrode and defining an electrode gap therebetween and a smoothly curved peripheral surface converging outwardly from the center of said electrode when viewed in axial cross section;
- means for clearing the surface of said outer electrode,
- power supply means connected between said inner and outer electrodes for generating a corona discharge between said planar member and said outer electrode;
- said planar member being the sole corona generating element of said inner electrode to allow said corona discharge to expand axially of said outer electrode to form a generally wedge-shaped electrostatic field between said planar member and said outer electrode thereby charging contaminants in said gas flowing through said electrode gap.
2 more elements
An apparatus for ionizing a gas, comprising:
- a tubular outer electrode adapted to conduct said gas therethrough;
- an inner electrode positioned within said outer electrode, said inner electrode including a planar member having a perimeter generally corresponding to the shape of said outer electrode and defining an electrode gap therebetween and a smoothly curved peripheral surface converging outwardly from the center of said electrode when viewed in axial cross section;
- and
- power supply means connected between said inner and outer electrodes for generating a corona discharge between said planar member and said outer electrode;
- said planar member being the sole corona generating element of said inner electrode to allow said corona discharge to expand axially of said outer electrode to form a generally wedge-shaped electrostatic field between said planar member and said outer electrode thereby ionizing said gas flowing through said electrode gap.
2 more elements
Dependencies are inferred from the claim text.