US 12,320,564 B2
Device and method for pre-cooling a stream of gas
Florian Jalia, Courbevoie (FR); Hamza Filali, Courbevoie (FR); and Audrey Hubert, Courbevoie (FR)
Appl. No. 18/256,052
Filed by ENGIE, Courbevoie (FR)
PCT Filed Dec. 10, 2021, PCT No. PCT/EP2021/085174
§ 371(c)(1), (2) Date Jun. 6, 2023,
PCT Pub. No. WO2022/128780, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 2013265 (FR), filed on Dec. 15, 2020.
Prior Publication US 2024/0093924 A1, Mar. 21, 2024
Int. Cl. F25B 41/42 (2021.01); F25B 9/00 (2006.01); F25B 9/10 (2006.01); F25B 41/39 (2021.01)
CPC F25B 41/42 (2021.01) [F25B 9/002 (2013.01); F25B 41/39 (2021.01); F25B 9/10 (2013.01); F25B 2313/031 (2013.01); F25B 2500/05 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A device for pre-cooling a flow of a gas, comprising:
downstream from a first coolant flow compressor, a first expander of at least one portion of a gaseous flow comprising at least nitrogen, referred to as “coolant flow”;
a separator for separating the gaseous coolant flow into two gaseous flows, said separator being positioned downstream from the first coolant flow compressor:
one coolant flow referred to as “medium-pressure”; and
one coolant flow referred to as “low-pressure”;
a first exchanger exchanging heat between the flow of gas to be pre-cooled and at least the medium-pressure gaseous coolant flow comprising at least nitrogen;
a second expander of the low-pressure gaseous coolant flow;
a second exchanger exchanging heat between the flow of gas and the expanded low-pressure gaseous coolant flow on output from the second expander;
a third exchanger exchanging heat between the flow of gas and the low-pressure gaseous coolant flow on output from the second heat exchanger; and
the first coolant flow compressor of the expanded low-pressure gaseous coolant flow and the medium-pressure gaseous coolant flow on output from the first heat exchanger to form a high-pressure gaseous coolant flow.