WESLEY M ROHRER JR
Engineers in Pittsburgh, PA

5316737, May 31, 1994

Jul 1, 1993

8/085620

Arthur P. Skelley - Pittsburgh PA
James C. McMichael - Monroeville PA
James T. Cobb - Pittsburgh PA
Wesley M. Rohrer - Pittsburgh PA
Phillip E. Custer - Pittsburgh PA

Cannon Boiler Works, Inc. - New Kensington PA

B01D 5100

422170

Exhaust gases containing oxides of nitrogen and sulfur from a fired process heater, a fossil fuel fired boiler, or a chemical process are diverted from a stack prior to admission to the atmosphere through a duct system containing heat exchangers that reduce the exhaust gas from an elevated temperature, if any, to about ambient temperature. Any heat extracted from the exhaust gas may be transferred to the boiler feed water which would serve to reduce the energy cost of operating a boiler. Once the exhaust gas is cooled to about ambient temperature, the gas is then mixed with an oxidant, such as ozone, at a preselected molar ratio to transform the oxides to higher orders of nitrogen and sulfur oxides to increase the absorbability of the nitrogen and sulfur oxides in a reagent solution. The reagent absorbs the oxidized contaminants from the exhaust gas. The oxides are transformed to dilute acids which are then neutralized to form salts that are acceptable for discharge to a municipal waste water treatment plant.

5206002, Apr 27, 1993

Aug 29, 1991

7/751728

Arthur P. Skelley - Pittsburgh PA
James C. McMichael - Monroeville PA
James T. Cobb - Pittsburgh PA
Wesley M. Rohrer - Pittsburgh PA
Phillip E. Custer - Pittsburgh PA

Cannon Boiler Works, Inc. - New Kensington PA

C01B 2100, C01B 1700

423235

Exhaust gases containing oxides of nitrogen and sulfur from a fired process heater, a fossil fuel fired boiler, or a chemical process are diverted from a stack prior to admission to the atmosphere through a duct system containing heat exchangers that reduce the exhaust gas from an elevated temperature, if any, to about ambient temperature. Any heat extracted from the exhaust gas may be transferred to the boiler feed water which would serve to reduce the energy cost of operating a boiler. Once the exhaust gas is cooled to about ambient temperature, the gas is then mixed with an oxidant, such as ozone, at a preselected molar ratio to transform the oxides to higher orders of nitrogen and sulfur oxides to increase the absorbability of the nitrogen and sulfur oxides in a reagent solution. The reagent absorbs the oxidized contaminants from the exhaust gas. The oxides are transformed to dilute acids which are then neutralized to form salts that are acceptable for discharge to a municipal waste water treatment plant.

6162409, Dec 19, 2000

Mar 15, 1999

9/268385

Arthur P. Skelley - McMurray PA
John M. Koltick - Bethel Park PA
Naresh J. Suchak - North Plainfield NJ
Wesley M. Rohrer - Pittsburgh PA

B01J 800, C01B 2100, C01B 1700, C01B 2138

4232391

An exhaust gas stream containing oxides of nitrogen and sulfur from a fossil fuel fired boiler, a fired process heater, or a chemical process are diverted from a stack prior to emission to the atmosphere through a duct system to a mixer where an oxidant, such as ozone, is added to the exhaust gas at a preselected molar ratio for a preselected residence time to transform the oxides to higher order nitrogen oxides. The oxidized contaminants are treated with a reagent solution. The reagent solution absorbs the oxidized contaminants and unreacted oxidant in the exhaust gas stream. Nitrogen and sulfur oxides in the gas steam are transformed to dilute acids which are neutralized to form salts suitable for discharge to a municipal waste water treatment plant or landfill disposal. The salt solution is also useful as a fertilizer or in the manufacture of fertilizers. The treated exhaust gas is then emitted from an exhaust stack containing NO. sub. x and SO. sub.

4745869, May 24, 1988

Jun 22, 1987

7/064723

James A. Dilmore - Irwin PA
Suh Y. Lee - Monroeville PA
William E. Young - Churchill Boro PA
Wesley M. Rohrer - Pittsburgh PA

Westinghouse Electric Corp. - Pittsburgh PA

F23D 100

110347

A method and apparatus for calcining limestone to produce lime wherein coal is combusted to provide heat for the calcination. The coal is combusted in a two stage combustion unit, with at least seventy-five percent of the slag formed by the coal combustion removed from the first stage of the combustion unit. Residual gases and fuel are further combusted in the second stage of the two stage combustor, with hot combustion gases therefrom, having the molten slag removed, fed directly to the calcining chamber of a rotary lime kiln. The coal may be carbonized to form a char and a fuel gas for use in the two stage combustor.

4767323, Aug 30, 1988

Jun 22, 1987

7/064722

James A. Dilmore - Irwin PA
William E. Young - Churchill Boro PA
Wesley M. Rohrer - Pittsburgh PA
Abner B. Turner - Hempfield Township, Westmoreland County PA

Westinghouse Electric Corp. - Pittsburgh PA

F27B 738

432116

An apparatus and method for retarding the formation of a slag ring on the inner wall of a rotary lime kiln where coal combustion gases are used to provide heat in the calcining chamber of a rotary lime kiln. The inner wall of the kiln, at a predetermined location where a slag ring would tend to form, is cooled so as to cool the dispersed slag prior to contact with the inner wall of the calcining chamber sufficiently to prevent adherence of the slag to the inner wall. Cooling chambers or a cooling channel may be provided in the refractory lining forming the inner wall, or transpiration devices may be provided to inject coolant into the calcining chamber, at the predetermined location, to cool the slag and prevent adherence thereof to the inner wall.

3936348, Feb 3, 1976

Feb 5, 1973

5/329635

William J. Wachter - Pittsburgh PA
Wesley M. Rohrer - Pittsburgh PA

G01m 324, G21c 1706

176 19LD

The present invention generally relates to nuclear fuel reactors, and more particularly relates to a method and apparatus, based upon vibration detection and analysis techniques, for detecting a failure or rupture of fuel elements or tubes containing nuclear fuel.