Electrostatic precipitator having high strength discharge electrode

摘要

There is disclosed an electrostatic precipitator with a discharge electrode having dimensional and configuration characteristics which provide high field strength and high current density particularly in a wet electrostatic precipitator. The round cylindrical collector tube of length (L) and with an inner diameter (D) has a coaxially positioned discharge electrode having an electrode supporting mast of a diameter from 0.25 to 0.40 D with an electrically conducting closed screw flight secured to the mast. The screw flight has an overall diameter (d) of from 0.33 to 0.67 D with a pitch of from D-d/2 to D-d and an overall length of from one screw revolution to L-(D-d), preferably one-half L or less and most preferably one to two revolutions. The short screw flight is economical and readily adjusted. The screw flight has a thickness of from about 0.05 to 0.15 inch and has a symmetrically curved outer edge. The collector tube is flared at its lower end to direct water away from the electrode mast as the water is discharged from the tube. The discharge electrode is supported from above and centered by means of adjustable tie rods at its lower end.