公开(公告)号：US20240336489A1

公开(公告)日：2024-10-10

申请号：US18573888

申请日：2022-07-06

Applicant: Topsoe A/S

Inventor： Christian Henrik SPETH ,  Pat A. HAN ,  Lari Bjerg KNUDSEN

IPC: C01C1/04 ,  C25B1/04

CPC classification number: C01C1/047 ,  C25B1/04

Abstract: The invention relates to a method for operating an ammonia cooling circuit of an ammonia synthesis plant for preventing pressure variations in the cooling circuit due to varying load or outlet temperatures, wherein the method comprises: iii-1) adapting the liquid level of condensing ammonia inside the ammonia condensing unit of the cooling circuit according to the pressure of the compressed ammonia vapor stream, in which the ammonia condensing unit is a tube-shell heat exchanger; and/or iii-2) adapting the flow of cooling medium to the ammonia condensing unit according to the pressure of the compressed ammonia vapor stream of the cooling circuit; and/or iii-3) adapting the temperature of cooling medium directed to the ammonia condensing unit by recycling a portion of the cooling medium return stream. The invention relates also to an ammonia cooling circuit arranged for carrying out the method, its use for revamping an ammonia synthesis plant into a green ammonia synthesis plant, and an ammonia synthesis plant comprising the ammonia cooling circuit.