Michael A Hendrickson

US Patent:

20050084434, Apr 21, 2005

Filed:

Sep 10, 2004

Appl. No.:

10/938124

Inventors:

Craig Cox - Fruit Heights UT, US
Michael Hendrickson - Woodinville WA, US
Mark Hennenfent - San Diego CA, US

International Classification:

B01D053/56
F23J011/00

US Classification:

423235000, 422171000

Abstract:

Systems and methods for removing toxic emissions from flue gas of coal fired combustions units can be achieved. Decreasing nitrogen oxide and sulfur emissions from a coal fired circulating fluidized bed reactor can include treating flue gas using a selective catalytic reduction system and a wet scrubber. Furthermore, reducing the nitrogen oxide emissions from a pulverized coal reactor can be accomplished with a selective non-catalytic reduction system. Additionally, the reduction of sulfur oxide emissions from a pulverized coal reactor can be enhanced using dry and/or wet scrubbers. Such systems and methods provide improved levels of toxic emissions over currently available technologies.

US Patent:

20050084437, Apr 21, 2005

Filed:

Oct 20, 2003

Appl. No.:

10/690219

Inventors:

Craig Cox - Fruit Heights UT, US
Michael Hendrickson - Woodinville WA, US

International Classification:

B01D053/34
B01D053/50

US Classification:

423243010, 422168000

Abstract:

Systems and methods for removing toxic emissions from flue gas of coal fired combustion units can be achieved. Decreasing sulfur oxide emissions from a coal fired circulating fluidized bed reactor can include treating flue gas unit using a wet scrubber. Wet scrubbers can include gas phase scrubbers, liquid phase scrubbers, and gas-liquid phase scrubbers. Additionally, toxic emissions can be reduced from coal fired combustion units such as circulating fluidized beds or pulverized coal units. Particulates can be removed from flue gas of the coal fired combustion unit. The flue gas can then be treated with at least two consecutive wet scrubbers to produce a low sulfur flue gas. In addition to sulfur oxides, a wide variety of toxic emissions can be removed such as nitrogen oxides, carbon monoxide, arsenic, beryllium, cadmium, hydrochloric acid, chromium, cobalt, hafnium, lead, manganese, mercury, nickel, selenium, benzo(a)pyrene, and combinations thereof. Such systems and methods provide improved levels of toxic emissions over currently available technologies.