Energy-saving drying system for printing and dyeing mill

The utility model discloses an energy-saving drying system of a printing and dyeing mill, which comprises a heat source unit, an ejector, a setting machine, a flash tank, a dye vat and a drying unit, a steam outlet of the heat source unit is connected with an ejection port of the ejector through a pipeline, and an outlet of the ejector is connected with a steam input port of the setting machine through a pipeline. A waste steam exhaust port of the setting machine is connected with an input port of the flash tank through a pipeline, and an output port of the flash tank is connected with an ejection port of the ejector through a pipeline; the flash tank is provided with a second outlet connected with the dye vat; a second heat exchanger is arranged on a connecting pipeline of the flash tank and the dye vat, and a cold air pipe is arranged to be connected with the drying unit through the second heat exchanger. The utility model has the following beneficial effects: (1) energy is saved and production cost is redu