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. 23, 1988
Filed:
Nov. 08, 1985
Applicant:
Inventors:
Assignee:
Babcock-Hitachi Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
422171 ; 422 49 ; 422193 ; 422219 ; 436 37 ;
Abstract
In an apparatus for removing NOx from a flue gas comprising an ammonia injection tube in a flue gas duct, an NOx removal reactor containing a catalyst at the downstream side of the ammonia injection tube, and a bracket casing catalyst test pieces being provided in the reactor and fixed to the reactor in a detachable manner from the outside of the reactor apart from the catalyst, deterioration of catalyst can be monitored during the operation of the boiler plant and sampling of catalyst can be carried out through the catalyst sample pieces without discontinuing the operation of the apparatus for removing NOx.