Explosion-proof difluoroethane synthesis reaction kettle

Two feeding pipes are connected to a switch valve of the reaction kettle, a pressure gauge is installed on the top of the reaction kettle, a gas source is connected to the reaction kettle through a gas pipe, and the other switch valve of the reaction kettle is connected to a gas inlet in the bottom of a buffer tower through a guide pipe; the inner wall of the buffer tower is sleeved with a piston plate. When the reaction kettle continuously prepares difluoroethane for a long time, once the air pressure in the kettle is reduced due to aging of a sealing element and is detected by a pressure gauge, the feeding switch valve can be quickly closed, and the switch valve for connecting a gas source and the buffer tower is opened, so that compressed carbon dioxide is quickly filled into the reaction kettle to dilute inflammable gas and is guided into the buffer tower; when the piston plate is continuously pushed by the mixed gas to move upwards to reach the top, a large amount of low-concentration difluoroethane mixe