DEVICE AND METHOD FOR MODIFYING POLYPROPYLENE-BASED INSULATING MATERIAL FOR HIGH-VOLTAGE DIRECT-CURRENT CABLE

摘要

Disclosed is a device for modifying a polypropylene-based insulating material for a high-voltage direct-current cable, comprising a reaction kettle, a heating device, a stirring device, a computer control unit, and a suction filtration recovery device. The computer control unit is signally-connected to the heating device, the stirring device, and the suction filtration recovery device, and sends instructions to control a process flow. A heating control unit receives a temperature control instruction issued by the computer control unit and temperature feedback information from a thermocouple sensor, and controls the on/off state of a power supply of a resistance heating wire. Further disclosed is a modification method, comprising: first, placing a polypropylene composite base material and an organic solvent into the reaction kettle; turning on the heating device to heat up the polypropylene composite base material and the organic solvent in the reaction kettle and maintaining that state; stirring; adding a crosslinking agent accounting for 1% to 3% of the total mass of polyvinyl and octavinyl POSS into the reaction kettle and stirring for 5 to 10 minutes; and lowering the temperature and recycling. The organic solvent of the present invention has low toxicity and is produced in an enclosed environment, and can be recycled, providing excellent economic and environmental benefits.