▎ 摘　　要

NOVELTY - The utility model claims a double-preheating type graphene puffing device, comprising a bulking furnace, a first pre-heater, a second pre-heater, a container, the middle position of the puffing furnace is provided with an ignition heating cavity; the ignition heating cavity bottom is provided with an igniter; the ignition heating cavity bottom is connected with an air inlet pipe and the top is connected with an exhaust pipe; the exhaust pipe is connected with the bottom of the first preheater; the top of the first preheater is provided with an air outlet; one side wall of the bulking furnace is provided with a discharging port; the discharging port is connected with the top part of the second pre-heater; the bottom of the second pre-heater is provided with a discharging port; the discharging port is connected with a storage box, a first pre-heater, the middle part of the second pre-heater is provided with a pre-heating cavity; the top of the pre-heating cavity is provided with a feeding port and the bottom is connected with the turnover box; the top of the turnover box is provided with a bucket elevator; a connecting box is set between the outlet of the top of the bucket elevator and the inlet of the top of the bulking furnace; the connecting box is provided with a conveyor belt device. The utility model shortens the swelling time; the heat in the puffing process realizes reasonable recycling and utilization, saves energy.