Corona line features out of the auxiliary discharge prick on the support tube, straight edge burr is sandwiched between two semi-circular tube support plate. The new folder thorn prick tubular wire, the current density even when corona discharge, corona current form large, medium and small different levels do not drop a class of tubular side prick prick lines, so that ESP is reliable, dust, high efficiency, low energy consumption, suitable for electrostatic precipitator. Corona wire has high mechanical strength, easy to break, cleaning convenient, low cost, very simple manufacture, etc., suitable for use or for older electrostatic precipitator transformation in the new Electrostatic Precipitator. Corona line from the use of thin steel plate bent and punched out on both sides of the steel sheet and prick corona wire vertical. Prick line belongs to the discharge point, high mechanical strength, easy to break and deformation. Since the tip discharge, enhancing the board near the line of electric wind, prick point easy to dust, dust, high efficiency, high dust concentrations suitable for the occasion, in a large electrostatic precipitator, often in the first and second electric field use . Thorns prick electrode junction sometimes small ball, so easy cleaning. Commonly used columnar prick line, flat prick line, tubular prick lines, zigzag lines, angle steel prick lines, wavy lines and prick fish bone lines. Tubular prick line, also known as RS line, general and 480C or 385Z-shaped plate-shaped plate is equipped with, is more commonly used corona electrode. Early tubular prick line is composed of two semi-circular tubes and welded prick. Not easy to fall off due to prick spot welding, if the burr and half-pipe made out of a steel plate, as a whole front line like prick, prick will not fall off, but tests have shown that the tube opposite the collecting plate at a current density of zero. Now press out the spikes of tubular pipe prick line solve the problem of uneven corona current.