NOVELTY - Device comprises e.g. a first molding machine (1), a second molding machine (2), a third molding machine (3), 2-6 molding machines (4), a first discharge pipeline (5), a second discharge pipeline, a third discharge pipeline, 2-6 discharge pipelines, a main discharge pipeline, a sludge drying granulating device, a drying granulating device gas inlet, a drying granulating device feeding port, a quantitative feeding machine, a spiral conveying machine, a drying granulating device outlet, an electric valve, a multi-level dust-removing degassing device, a draught fan, a pipeline and a chimney.    USE - The device is useful for treating waste gas and waste heat produced by printing and dyeing sludge (claimed).    ADVANTAGE - The method has low energy consumption.    DETAILED DESCRIPTION - Device comprises a first molding machine (1), a second molding machine (2), a third molding machine (3), 2-6 molding machines (4), a first discharge pipeline (5), a second discharge pipeline, a third discharge pipeline, 2-6 discharge pipelines, a main discharge pipeline, a sludge drying granulating device, a drying granulating device gas inlet, a drying granulating device feeding port, a quantitative feeding machine, a spiral conveying machine, a drying granulating device outlet, an electric valve, a multi-level dust-removing degassing device, a draught fan, a pipeline, a chimney, a drying granulating device discharge port, a conveyor and a sludge finished product library. The second discharge pipeline passes through the second molding machine. The third discharge pipeline passes through the third molding machine. The one end of the 2-6 discharge pipelines are respectively connected to main discharge pipeline. The front portion of the sludge drying granulating device is connected to the other end of the main discharge pipeline. The upper front portion of the sludge drying granulating device is connected with the drying granulating device gas inlet. The drying granulating device gas inlet is connected to the quantitative feeding machine by the screw conveyor. The bottom part of the drying granulating device is connected to the drying granulating device discharge port. The sludge finished product library and the conveyor are connected to the drying granulating device discharge port. The sludge drying granulating device is connected to the drying granulating device outlet. An electric gate valve, the multi-level dust-removing degassing device, draught fan, pipeline and chimney, are sequentially connected to each other. An INDEPENDENT CLAIM is also included for use method of device in treating waste gas and waste heat produced by printing and dyeing sludge, comprising (i) taking printing and dyeing sludge having water content of 78-85%, and transferring into the sludge drying granulating device by quantitative feeding machine and spiral conveying machine; (ii) passing hot exhaust gas emissions into 2-6 sets of dyeing stereotypes, and concentrating the hot exhaust gas emissions by passing through main exhaust pipe, and passing through sludge drying granulating device; (iii) passing the particles into the sludge drying granulating device, and directly contacting the wet sludge with hot exhaust gas, and evaporating moisture from wet sludge by subjecting to heat exchange process and drying, to obtain dry sludge, and molding the particles to natural diameter of 1-10 mm, and absorbing the molded exhaust gas fibers and oil mist, and wrapping in the particles; (iv) carrying out drying process of hot exhaust gas, reducing the temperature to 90-110 degrees C, so as to reduce the concentration of fiber and oil mist, and passing the material through multi-level dust-removing degassing device, to guarantee the discharge standards; and (v) drying the sludge particles used as coal auxiliary fuel by passing through burning-heating furnace, and printing the printing and dyeing sludge, so as to obtain completely harmless and recyclable treatment.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the device.    First molding machine (1)    Second molding machine (2)    Third molding machine (3)    Molding machines (4)    First discharge pipeline (5)