Bryan Fisher

US Patent:

7217401, May 15, 2007

Filed:

Nov 19, 2003

Appl. No.:

10/717293

Inventors:

Bruce W. Ramme - Okauchee WI, US
Terry L. Coughlin - Saukville WI, US
Bryna D. Goeckner - Whitefish Bay WI, US
Bryan C. Fisher - Kennesaw GA, US
John J. Noegel - Grafton WI, US

Assignee:

Wisconsin Electric Power Company - Milwaukee WI

International Classification:

B01D 47/00

US Classification:

423210, 502 38, 502 39, 502 41

Abstract:

A method for reducing the amount of mercury affixed to a sorbent and/or fly ash is disclosed. The method includes the steps of providing an amount of sorbent and/or fly ash wherein at least a portion of the amount of sorbent and/or fly ash has particulates having mercury compounds affixed to the particulates; and exposing the amount of sorbent and/or fly ash to heated flowing air until mercury compounds are liberated from at least some of the particulates. Preferably, the amount of sorbent and/or fly ash is maintained in the heated flowing air until the sorbent reaches a temperature of at least 700 F. (372 C. ). When the sorbent is activated carbon, it is preferred that the amount of sorbent and/or fly ash is maintained in the heated flowing air until the activated carbon reaches a temperature in the range of 700 F. (372 C. ) to 1000 F. (538 C. ).

US Patent:

53803515, Jan 10, 1995

Filed:

Dec 21, 1993

Appl. No.:

8/171030

Inventors:

Bryan C. Fisher - Kennesaw GA

Assignee:

ReUse Technology, Inc. - Kennesaw GA

International Classification:

C22B 702

US Classification:

75313

Abstract:

A process for the agglomeration of flue gas desulfurization dust is disclosed comprising the steps of introducing flue gas desulfurization dust as feed material into a conventional, high-intensity mixing device and admixing with water to form spheroidal agglomerates ranging in size from a Tyler number of about 40 mesh to about 1/2 inches in size. The agglomerates are either dried to ambient temperature, or by dusting them with a portion of the dry feed material, and recovered. The process can effectively agglomerate any calcium- and sulfur-containing flue gas desulfurization dust by adjusting the amount of water added and providing for the proper amount of mixing energy and duration. The mixing device can be selected from any one of a group of conventional, high-intensity mixers consisting of, but not limited to, a pin mixer, paddle mixer, plow mixer, pan pelletizer and disc pelletizer. An agglomerate produced in accordance with the present invention is a free-flowing, non-dusting, non-hygroscopic product of desirable size having application as a soil additive which can be spread easily in agricultural type spreaders.