Waste heat utilization system in starch production

The utility model discloses a waste heat utilization system in starch production, and relates to the technical field of starch production devices, a tube nest inlet of a tube nest heat exchanger is communicated with a concentrated gluten feed pipe, a tube nest outlet of the tube nest heat exchanger is communicated with a concentrated gluten discharge pipe, a shell inlet of the tube nest heat exchanger is communicated with a clear water feed pipe, and a shell outlet of the clear water feed pipe is communicated with a concentrated gluten discharge pipe. And a shell outlet of the shell-and-tube heat exchanger is communicated with a clear water discharging pipe. Low-temperature clear water enters a shell from a shell inlet of the shell-and-tube heat exchanger, high-temperature concentrated gluten enters a tube body from a tube inlet of the shell-and-tube heat exchanger, the low-temperature clear water wraps the outer side of a tube and exchanges heat with the concentrated gluten in the tube, the temperature of th