The utility model belongs to the technical field of
recovery heat exchange devices, and provides a
fermentation liquor preheating
recovery heat exchange device in
sugar alcohol production. The device comprises a mounting main sleeve cover, a connecting through
pipe, a sealing outer sleeve and a
plate heat exchanger, the sealing outer sleeve is mounted on the mounting main sleeve cover; the mounting main sleeve cover is detachably mounted on a reaction kettle filled with
fermentation liquor, and is hermetically connected with the reaction kettle filled with the
fermentation liquor through the sealing outer sleeve; the mounting main sleeve cover is provided with an
evaporation liquid cavity, a liquid inlet and a liquid outlet; the liquid inlet and the liquid outlet are respectively formed in the
evaporation liquid cavity; the liquid inlet is communicated with an external
water source; the liquid outlet is communicated with one end of the connecting through
pipe, the other end of the connecting through
pipe is communicated with the
plate heat exchanger, and the
plate heat exchanger is communicated with external equipment. Therefore, the device not only is reasonable in design, but also is simple to operate, can improve the heat efficiency in the
heat transfer process, and is suitable for industrial popularization.