Fecha de publicación: 04/08/2023 Fuente: WIPO "processing tomato" The invention relates to the technical field of tomato juice evaporation processing, in particular to application of a mechanical vapor compression system in tomato sauce processing, the mechanical vapor compression system comprises a raw material tank, and the discharging end of the raw material tank is communicated with a first feeding pump through a pipeline; the first feeding pump communicates with a first preheater through a pipeline, the first preheater communicates with a second preheater through a pipeline, preheating of tomato juice is achieved through the first preheater and the second preheater, the flow of the material circulating pump is greatly reduced, and the power consumption of the material circulating pump is reduced; tomato juice is evaporated and concentrated through operation of the evaporation device, the standing time of the tomato juice in the first heating evaporator and the second heating evaporator is shortened, the heating time is short, and concentrated liquid is subjected to film evaporation from the top of the first heating evaporator from top to bottom; the problem that the upper part of an existing climbing-film evaporator is easy to dry due to the fact that materials climb a film upwards and are not easy to control is solved.