The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2017
Filed:
Nov. 22, 2013
Foster Wheeler Energia Oy, Espoo, FI;
Tobias Brand, Grossostheim, DE;
Reijo Kuivalainen, Varkaus, FI;
Maria-Helena Möbs, Bad Nauheim, DE;
Rolf Graf, Friedrichsdorf, DE;
AMEC FOSTER WHEELER ENERGIA OY, Espoo, FI;
Abstract
Sulfurous fuel and CaCO-containing sorbent are combusted in a furnace of a circulating fluidized bed boiler. A dry circulating fluidized bed scrubber includes a reactor with water and Ca(OH)feeds for converting SOin the exhaust gas to CaSOand CaSOand a dust separator in gas flow connection with the reactor. A discharge removes CaO-containing bottom ash from the furnace. A classifier classifies a portion of the removed CaO-containing bottom ash into coarse and finer portions. A fine ash channel conveys some of the finer bottom ash portion from the classifier to a grinder. A ground ash channel conveys some of the ground bottom ash portion from the grinder to a hydrator to hydrate CaO in the ash to Ca(OH). A hydrated ash channel conveys some of the Ca(OH)from the hydrator to the dry circulating fluidized bed scrubber as a sorbent.