Method for corona discharge enhanced flue gas clean-up

Patent 4650555 Issued on March 17, 1987. Estimated Expiration Date:

October 3, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3205162

3601313

Process for denitration of exhaust gas
Patent #: 4110183
Issued on: 08/29/1978
Inventor: Furuta , et al.

Method and apparatus for treating electrically charged airborne particles
Patent #: 4162144
Issued on: 07/24/1979
Inventor: Cheney

Removal of contaminants from gases
Patent #: 4313739
Issued on: 02/02/1982
Inventor: Douglas-Hamilton

Plasma arc process for the reduction of sulfur dioxide to sulfur
Patent #: 4367211
Issued on: 01/04/1983
Inventor: Ray

Pollution control by spray dryer and electron beam treatment
Patent #: 4372832
Issued on: 02/08/1983
Inventor: Bush

Process for reduction of the content of SO₂ and/or NO_x in flue gas Patent #: 4416748
Issued on: 11/22/1983
Inventor: Stevens

Inventors

Application

No. 06/783583 filed on 10/03/1985

US Classes:

204/174, Sulfur-oxygen compounds204/177Nitrogen compounds

Examiners

Primary: Williams, Howard L.

Attorney, Agent or Firm

International Classes

B01D 53/32 (20060101)
B01D 53/60 (20060101)
B03C 3/00 (20060101)
B03C 3/017 (20060101)

Abstract

A process for removing pollutants including sulfur dioxide and/or nitrogen oxides from effluent gas which relies on the use of corona discharge to enhance the efficiency of the process. In one embodiment, corona discharge is utilized in a conventional spray dryer. In another it is combined with an ammonia injection technique. In yet another embodiment corona discharge treatment is followed by exposing the acidic mist byproduct leaving the discharge treatment chamber to a neutralizing reagent directed into the path of the effluent. The reagent may be provided with an electrical charge opposite to that on the acidic mist byproduct emerging from the corona reaction chamber to enhance neutralization.

Other References

"Electric Field Effects on Unit Operations-Charged Aerosols for Air Purification & Other Uses"-American Inst. Of Chem. Engineers-Sixth Ninth Natl. Mtg.-May 16-19, 1971, pp. 1-50
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"Mass Transfer of Sulfur Dioxide to Growing Droplets"-Role of Surface Electrical Properties-Michael J. Latteson & Philip J. Giardina-School of Chem. Eng., George Inst. of Tech., pp. 50-55
"Sulfur dioxide Conversion Under Corona Discharge Catalysis"-by W. R. Browne & E. E. Stone-Mar. 5, 1965
"Doe's Electron-Beam Irradiation Developmental Program, E. C. Traxler, pp. 1-14
"Corona Discharge Oxidation of Sulfur Dioxide"-M. J. Matteson, H. L. Stringer & W. L. Busbee-School of Che. Eng. Georgia Inst. of Tech. pp. 895-901