| 摘要 |
Provided is a discharge electrode such that, even if there is an increase in the outer diameter of a trapping tube of a tubular trapping part of an electrostatic precipitator for treating diesel engine exhaust gas, the placement of electrode needles relative to a primary electrode can be set appropriately at a prescribed density, the electrode needles can be reduced in weight and maintained in shape, and the discharge electrode is effective in high-temperature countermeasures. The invention is characterized in having a tubular trapping part that comprises a primary electrode and a discharge electrode for electrifying particulate matter contained in exhaust gas of a diesel engine that uses heavy oil, and a dust-collecting electrode for trapping the electrified particulate matter; the discharge electrode of the diesel engine exhaust gas treatment device, in which tubular trapping modules short in axial length and differing in diameter are disposed in a plurality of levels in the tubular trapping part, being configured such that short discharge electrode needles or low-height saw-blade-shaped discharge electrode plates are radially arranged on the outer periphery of a cylindrical discharge electrode support pipe mounted on the outer periphery of the primary electrode. |
