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:
Aug. 15, 2017
Filed:
Nov. 25, 2013
Norsk Hydro Asa, Oslo, NO;
Ntnu Technology Transfer As, Trondheim, NO;
Erling Naess, Ranheim, NO;
Otto Kristian Sonju, Trondheim, NO;
Torbjorn Slungaard, Stjordal, NO;
Bjorn Petter Moxnes, Ovre Ardal, NO;
NORSK HYDRO ASA, Oslo, NO;
NTNU TECHNOLOGY TRANSFER AS, Trondheim, NO;
Abstract
The present invention relates to a method and equipment for recovering heat from exhaust gas removed from an industrial process, such as an electrolysis process for the production of aluminum. Heat is recovered by means of an extraction/suction system, where the exhaust gas contains dust and/or particles. The heat is recovered as the exhaust gas being brought into contact with heat-recovery elements. Flow conditions and the design of the heat recovery elements are such that the deposits of the dust and/or particles on the surfaces stated are kept at a stable, limited level. In preferred embodiments, the heat-recovery elements have a circular or an extended, elliptical cross-section and may be equipped with fins or ribs.