公开(公告)号：US20190177914A1

公开(公告)日：2019-06-13

申请号：US16323758

申请日：2017-08-17

Applicant: Valmet Technologies Oy

Inventor： Asta HUMALAJOKI ,  Antti VAELJAE ,  Heikki AIRIKKALA ,  Seppo TUOMINIEMI ,  Peter BJOERKLUND

IPC: D21C11/06 ,  D21C11/00 ,  C01B17/80

CPC classification number: D21C11/06 ,  B01D5/003 ,  B01D5/0054 ,  B01D5/0075 ,  C01B17/60 ,  C01B17/803 ,  C01B17/806 ,  D21C11/0064 ,  D21C11/04

Abstract: A system (100) for producing aqueous sulphuric acid. The system (100) comprises a first heat exchanger (410) configured to cool water and/or aqueous sulphuric for producing cooled water and/or cooled aqueous sulphuric acid; a pre-cooling unit (200) configured to pre-cool some gas containing sulphur trioxide, the pre-cooling unit (200) comprising an inlet or inlets (212, 214) for receiving [i] the gas containing sulphur trioxide and [ii] the cooled water and/or the cooled aqueous sulphuric acid, an outlet (216) for letting out aqueous sulphuric acid and the gas containing sulphur trioxide, and a first nozzle (220) for spraying the cooled water and/or the cooled aqueous sulphuric acid onto the gas containing sulphur trioxide to cool the gas containing sulphur trioxide. The system further comprises a condensation tower (300) comprising a first inlet (302) for receiving the cooled gas containing sulphur trioxide and aqueous sulphuric acid from the pre-cooling unit (200) and means (320) for circulating the aqueous sulphuric acid within the