Carbon black raw oil preheating device

The utility model discloses a preheating device for carbon black raw oil. Cylinder body, a smoke inlet is formed in the upper part of the front end of the barrel; a smoke outlet is formed in the sidewall of the rear end; heat exchange tube nests are arranged in the heat exchanger; one end of the heat exchange tube close to the flue gas inlet is connected with a raw oil outlet pipe; the other endis connected with a raw oil inlet pipe; a primary preheating coil pipe is annularly arranged on the outer wall of the cylinder body along the axial direction; one end of the primary preheating coil close to the flue gas outlet is connected with a raw oil inlet branch pipe; the other end of the raw oil inlet branch pipe is communicated with a raw oil inlet pipe pipeline between the inlet main valveand the first inlet valve, the other end of the primary preheating coil pipe is connected with a raw oil outlet branch pipe, and the other end of the raw oil outlet branch pipe is communicated with araw oil inlet pipe pipeline