According to the structure type of electric tar catcher, there are four kinds of vertical (concentric circular, tubular, cellular) and horizontal. The vertical electric tar catcher is mainly composed of shell, precipitating pole, corona pole, upper and lower hangers, gas redistribution board, steam blowing and washing tube, insulation box and feeder box and so on, which is mainly used for flue gas purification of gas generator with coke as raw material and coal as raw material. Horizontal electric tar catcher is widely used to recover tar from waste gas produced by roaster in carbon factory. It has the characteristics of small volume, direct recovery of tar, no secondary treatment and construction of sedimentation tank.