Atmospheric Environment Vol. 25A, No. 10, pp. i-ii, 1991. Pergamon Press plc. Printed in Great Britain.

NEW PATENTS

This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH ® online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH ~ can be obtained from Pergamon Orbit InfoLine Inc., 8000 Westpark Drive, McLean, Virginia 22102, U.S.A.

Copies of complete patents announced in this Section are available from Pergamon Orbit InfoLine Inc. for $8 per copy. Payment with order is required. Orders outside North America add $2 for air postage. Order by patent number for Pergamon Orbit InfoLine only.

4954324

M E T H O D O F B A G H O U S E B R O W N P L U M E P O L L U T I O N

C O N T R O L

Richard G Hooper assigned to NaTec Resources Inc

Baghouse SOx/NOx pollution control process comprising injecting from 1 to 25% urea or ammonia along with dry, finely divided sodium bicarbonate or Nahcolite, a naturally occurring form of sodium bicarbonate. The process removes both SOx and NOx from the flue gases of utility and industrial plants, incinerators and the like by dry injection into a flue gas duct a suf- ficient distance upstream of a baghouse to collect spent reagent and additive. The sodium reagent reacts with the SO2 to form sodium sulfate and also removes NOx in the form of NO. The urea or ammonia additive prevents the conversion of NO to NO2 by the sodium reagent, and reduces the concentration of the NO2 in the exit flue gases to below the NO2 brown plume visibility threshold (about 30 ppm NO2, not corrected to 0% 02, depending on ambient conditions). The additive may be used wet (sprayed into the flue gases in a concentrated water solution) or dry.

4958578

D R U M M E D W A S T E I N C I N E R A T I O N

Clarence G Houser assigned to Phillips Petro- leum Company

A method and apparatus for the incineration of waste materials contained within metal con- tainers is disclosed wherein the metal containers containing the waste materials are fed through a shredder to form a mixture of waste materials and metal shreds. This mixture is then fed, in a controlled manner, to a primary combustion chamber wherein the waste materials and metal shreds are incincerated to produce ash, deconiannated metal sheds and combustion gases.

4959084

C O M B I N E D A I R A N D W A T E R P O L L U T I O N C O N T R O L S Y S T E M

Billy Wolverton, Lamont Jarrell assigned to The United States of America as represented by the Administrator of the National Aeronautics and Space Administration

A bioaquatic air pollution control system for controlling both water and atmospheric pollu- tion. The pollution control system includes an exhaust for directing polluted gases out of a fur- nace and a fluid circulating system which cir- culates fluid, such as wastewater, from a source, past the furnace where the fluid flow entrains the pollutants from the furnace. The combined fluid and pollutants are then directed through a rock/plant/microbial filtering system. A suction pump pumps the treated wastewater from the fil- ter system past the exhaust to again entrain more pollutants from the furnace where they are com- bined with the fluid (wastewater) and directed to the filter system.

ii New Patents

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