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:
Jul. 05, 2022
Filed:
Sep. 24, 2019
Valmet Technologies Oy, Espoo, FI;
Risto Hämäläinen, Tampere, FI;
Tarja Korhonen, Tampere, FI;
Naveen Chenna, Tampere, FI;
Lauri Kokko, Tampere, FI;
VALMET TECHNOLOGIES OY, Espoo, FI;
Abstract
A method for producing aqueous hydrochloric acid from flue gases is provided. The method comprises conveying water to a first scrubber () or to a line () to use the water in a scrubbing liquid of the first scrubber. The method also comprises providing flue gas containing chlorides into the first scrubber () and scrubbing the flue gas containing chlorides with the scrubbing liquid by contacting the flue gas with the scrubbing liquid in the first scrubber (). Dilute hydrochloric acid and a flue gas derivate () are produced. The method comprises letting out at least some of the dilute hydrochloric acid from the first scrubber () as a scrubber bleed, separating solids suspended by the scrubber bleed in a solids separator (), conveying the scrubber bleed from the solids separator () into an evaporation vessel () and concentrating the scrubber bleed in the evaporation vessel () to produce hydrochloric acid vapor having a concentration of 5-22 wt-%. A corresponding system is also provided.