Pipeline heater is a kind of energy-saving equipment that pre heats the material. The pipeline heater can be divided into two modes: one is to use the flange type tubular electric heating element inside the pipeline heater to heat the conduction oil in the reactor jacket in the pipeline heater, and transfer the heat energy in the pipeline heater to the chemical raw materials in the reactor inside the pipeline heater Another way is to insert the tubular electric heating elements in the tubular heater directly into the reactor in the tubular heater or evenly distribute the electric heating tubes around the wall of the tubular heater.