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:
May. 01, 2012
Filed:
Apr. 11, 2008
Jun Shimamura, Hiroshima, JP;
Takanori Nakamoto, Hiroshima, JP;
Toshio Katsube, Hiroshima, JP;
Hirofumi Kikkawa, Hiroshima, JP;
Hiroyuki Nosaka, Hiroshima, JP;
Takayuki Saitou, Hiroshima, JP;
Yoshinori Taguchi, Hiroshima, JP;
Hiroshi Ishizaka, Hiroshima, JP;
Jun Shimamura, Hiroshima, JP;
Takanori Nakamoto, Hiroshima, JP;
Toshio Katsube, Hiroshima, JP;
Hirofumi Kikkawa, Hiroshima, JP;
Hiroyuki Nosaka, Hiroshima, JP;
Takayuki Saitou, Hiroshima, JP;
Yoshinori Taguchi, Hiroshima, JP;
Hiroshi Ishizaka, Hiroshima, JP;
Babcock-Hitachi Kabushiki Kaisha, Tokyo, JP;
Abstract
A system is provided that prevents inhibition of adsorption of Hg and other heavy metals by activated carbon or other heavy metal adsorbent due to prior adsorption of sulfur trioxide (SO) in an exhaust gas containing SO. As it has been found that while SOis adsorbed, the adsorption of SOprecedes the adsorption of Hg and other heavy metals onto activated carbon, a basic substance injection system is disposed along an exhaust gas flow channel at an upstream side of an activated carbon injection system, thereby attaining effective removal of Hg and other heavy metals from the exhaust gas by adsorption thereof onto surface pores of the activated carbon. The SOconcentration after removal by basic substance conversion is computed from the SOconcentration before removal, and the activated carbon injection rate can be controlled based on the concentration after removal.