公开(公告)号：US20230211312A1

公开(公告)日：2023-07-06

申请号：US17995011

申请日：2021-04-07

申请人： CASALE SA

发明人： Filippo Iocchi ,  Leonardo Marrone

IPC分类号： B01J19/24 ,  C01B3/34 ,  C01B3/02 ,  C01C1/04 ,  C07C273/04 ,  B01D53/14

CPC分类号： B01J19/245 ,  C01B3/34 ,  C01B3/025 ,  C01C1/0417 ,  C01C1/0488 ,  C07C273/04 ,  B01D53/1475 ,  B01J2219/00024 ,  C01B2203/0233 ,  C01B2203/0475 ,  C01B2203/068 ,  B01D2252/2041 ,  B01D2257/504

摘要： A method for revamping an ammonia-urea plant wherein: the ammonia section is modernized to produce an extra amount of low pressure steam; condensation stage of the high-pressure urea synthesis loop is modified to use part of the condensation heat of the urea stripper vapours to produce medium-pressure steam, said medium-pressure steam is fed to one or more steam users of the urea section, particularly for carbamate decomposition, the input of low-pressure steam to the urea section is balanced by importing the extra low-pressure steam produced in the ammonia section.