FIELD: chemistry.
SUBSTANCE: in method and device for cooling hydrocarbon flow cooled hydrocarbon flow (45) is subjected to heat exchange in first heat exchanger (50) with at least one flow of coolant (145b, 185b), characterised by rate (FR1) of first flow of coolant, which results in formation of cooled hydrocarbon flow (55), characterised by rate (FR2) of cooled hydrocarbon flow, and at least one return flow (105) of coolant. rate (FR1) of first coolant flow and rate (FR2) of flow of cooled hydrocarbon agent is regulated until first specified parameter (SP1) for rate (FR1) of first coolant flow is achieved. If first specified parameter (SP1) is larger than rate (FR1) of coolant flow, rate (FR2) of hydrocarbon flow is increased before increasing rate (FR1) of coolant flow, if first specified parameter (SP1) is lower than rate of coolant flow, rate (FR1) of coolant flow is reduced before reduction of rate (FR2) of hydrocarbon flow, and if rate (FR2) of hydrocarbon flow decreases, rate (FR1) of coolant flow is reduces.
EFFECT: prevention of heat exchanger overcooling.
15 cl, 3 dwg
