Abstract: An electrostatic precipitator includes a dust-collecting electrode group and a discharge electrode group arranged in the recited order with respect to the gas flow direction of a gas to be treated in the electrostatic precipitator. The discharge electrode group includes a plurality of discharge electrodes, each of which is made of a rectangular metal plate. The longitudinal edges of each plate form semicircles, with a series of saw-toothed portions having tips protruding from between each pair of semicircles. The dust-collecting electrode group includes a plurality of dust-collecting electrodes, each of which is made of a chain suspended adjacent the discharge electrode group at a predetermined spacing. The chains of the dust-collecting electrode groups are suspended so that they can rock back and forth.

Abstract: An electrostatic precipitator has a plurality of arrays of spaced parallel dust-collecting electrodes, and at least one array of spaced parallel discharge electrodes, each array of discharge electrodes is arranged between an adjacent pair of arrays of dust-collecting electrodes. Each array of dust-collecting electrodes and each array of discharge electrodes are arranged such that the faces of the dust-collecting and discharge electrodes are parallel to each other, and parallel to the flow direction of a gas to be treated. The spacing between the dust-collecting electrodes of an array of dust-collecting electrodes, and the spacing between the discharge electrodes of an array of discharge electrodes may be sequentially narrowed from the upstream side of the electrostatic precipitator to the downstream side of the electrostatic precipitator.

Abstract: An electrostatic precipitator of the present invention is composed of a discharge section positioned in a casing inducing gas to be treated containing unwanted matters such as dust and miscellaneous bacteria from a gas feeding duct to a gas exhaust duct and arranged in a state of crossing with a passage of the gas to be treated, and dust collecting sections each having a gas permeable configuration installed in parallel with each other at a distance in front and in the rear with respect to the discharge section, wherein a high voltage application unit is provided in the discharge section, a dust collecting chamber is provided at the lower part of the dust collecting sections, the discharge section, the dust collecting sections, the high voltage application unit and the dust collecting chamber are provided in one frame as one body, and the electrostatic precipitator is arranged to be installed freely in a row through a mounting flange provided on the peripheral surface of the frame with respect to a passage of