Novel heat exchanger

The utility model provides a novel heat exchanger which comprises a lamella heat exchanger and a vacuum container, the vacuum container comprises a container shell, a steam stirring system and a stirring steam pipe connected with the steam stirring system, and the tail end of the stirring steam pipe is located outside the vacuum container. According to the novel heat exchanger, cold and hot fluids such as deodorized oil and decolored oil are used for heat exchange, heat energy recovery is carried out, the purpose of consumption reduction is achieved, the temperature of the decolored oil subjected to heat recovery is increased, then the decolored oil is finally heated through high-pressure steam, and after oil-oil heat exchange and oil/high-pressure steam heat exchange, grease on one side flows into the vacuum container; steam is introduced into the steam stirring system, grease is stirred under high vacuum, volatile substances in the grease are removed, the purpose of pre-deodorization or supplementary deodor