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. 25, 2010
Filed:
Dec. 10, 2004
Ryosuke Nakagawa, Hiroshima, JP;
Tetsurou Hikino, Hiroshima, JP;
Ryosuke Nakagawa, Hiroshima, JP;
Tetsurou Hikino, Hiroshima, JP;
Babcock-Hitachi Kabushiki Kaisha, Tokyo, JP;
Abstract
An exhaust smoke denitrating apparatus in which using an NHinjection unit, compressed air is fed from blower to ejector for extracting of exhaust gas from HRSG1, and with thus obtained mixed gas, NH-containing gas is produced from NHwater by NHwater evaporator, the NH-containing gas injected through NH-containing gas injection nozzle of the HRSG1 disposed on a front stream side of denitration catalyst layer. As any high-temperature exhaust gas is cooled and diluted by compressed air, there is no danger of oxidation of NHduring the stage of evaporation of NHwater. The moisture level of exhaust gas can be lowered, thereby enabling inhibition of any drain generation in exhaust gas extraction piping. Air warming within NHwater evaporation system can be carried out at an early stage. The temperature of NH-containing gas obtained by evaporation of NHwater can be lowered, and a lowering of thermal stress within NH-containing gas piping can be easily accomplished, so that denitration of exhaust gas can be easily accomplished. Even when sulfur oxides are contained in exhaust gas, it is feasible to avoid any problem of clogging of the NHwater injection nozzle.