Process and device for realizing energy-saving and efficient drying of carbide slag

The invention discloses a process and device for realizing energy-saving and efficient drying of carbide slag. The device comprises a preheater (1), a hot air pipe (2), a hot air furnace (3), an inter-furnace air inlet pipe (3I), an inter-furnace air outlet pipe (3II), a calcium carbide furnace tail gas inlet pipe (3III), an in-furnace air inlet pipe (3IV), spiral fins (3V), a hot air furnace outlet pipe (4), a blind pipe (5), a hot air pipe (6), a carbide slag inlet (7), a drying-crushing machine (8), a dry powder conveying pipe (9), a cyclone separator (10) and a dry powder warehouse (11). The process and device have the following advantages that the hot air furnace (3) is additionally arranged in the process, the drying efficiency is improved, and recycling of calcium carbide furnace tail gas is achieved; the preheater 1 can recycle waste heat generated in chemical production; and upper and lower folding fins or the spiral fins 3 (V) are arranged in gaps of the hot air furnace (3), so that the heat exchang