Antioxidant addition device and method for 500 kV cross-linked polyethylene insulating material

An antioxidant addition device for a 500 kV cross-linked polyethylene insulating material, comprising a heating hopper module and a heat-insulation conduit module, wherein:

• the heating hopper module comprises an inlet port, a heating jacket, a material bin, and a filter screen, the material bin is positioned vertically;
• the inlet port is provided at an initial portion of the material bin, the heating jacket is provided surrounding an outer peripheral wall of the material bin, a terminal end of the material bin is connected to the heat-insulation conduit module, and the filter screen is positioned in front of the heat-insulation conduit module;
• the heat-insulation conduit module comprises a liquid metering pump, a stainless steel liquid-conduit, a heat-insulation unit, and an outlet port, one end of the liquid metering pump is connected to a horizontal conduit of the material bin, the other end of the liquid metering pump is connected to one end of the stainless steel liquid-conduit, the other end of the stainless steel liquid-conduit is provided with the outlet port, and the stainless steel liquid-conduit is surrounded by the heat-insulation unit;
• and
• an antioxidant is added into the material bin through the inlet port , heated in the material bin to a liquid phase antioxidant, filtered through the filter screen, then metered by the liquid metering pump, then passed into the stainless steel liquid-conduit, and finally discharged through the outlet port for use.