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1. (WO2018122717) COMPACT PLANT AND OPTIMIZED PROCESS FOR THE PRODUCTION OF AN AQUEOUS UREA SOLUTION

Pub. No.:    WO/2018/122717    International Application No.:    PCT/IB2017/058356
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Sat Dec 23 00:59:59 CET 2017
IPC: B01J 19/24
B01J 19/26
B01J 8/14
Applicants: AMA S.P.A.
Inventors: ANNIBALE, Riccardo
MASCIALINO, Claudio
Title: COMPACT PLANT AND OPTIMIZED PROCESS FOR THE PRODUCTION OF AN AQUEOUS UREA SOLUTION
Abstract:
The present invention refers to a plant (1) for the preparation of an aqueous urea solution (AUS) suitable to be used in an SCR process for removing nitrogen oxides from a flow of exhaust gas comprising a mixing tank (10), an inlet circuit (20) equipped with first pumping means (P1) to charge demineralized water into said tank (10), loading means (30) to charge urea in solid form into the tank (10) and mixing means to obtain said solution (AUS). In particular, the mixing means comprise a recirculating and mixing circuit (100) extending outside said tank (10) and comprising second pumping means (P2) suitable to collect in a batch mode a plurality of tangential nozzles (101) arranged and configured so as to maintain a turbulent swirling agitation in the liquid contained therein. The present invention also concerns a process for the preparation of an aqueous urea solution.