Abstract: An apparatus is disclosed for improving the performance of a high voltage, rapper-type precipitator having a supply electrode and a rapper rod passing through a grounded precipitator roof and attached to an array of discharge electrodes. Alumina insulation sleeves are installed over the supply electrodes and rapper rods to prevent sparking to the grounded precipitator roof. A shock absorber is provided on the lower end of the insulator to prevent damage to the insulator during precipitator rapping.

Abstract: An exhaust gas cleaning device is provided, which is simple in structure and offers good performance in the cleaning of exhaust gas from car engines. The cleaning device includes a conductive cylindrical body through which the exhaust gas passes. A shaft is installed at the center of the conductive cylindrical body. A set of blades is provided on the shaft acting as a fan for sucking the exhaust gas in and out of the conductive cylindrical body. A scraping knife is provided also on the shaft. A static-electric generator having one pole connected to the cylindrical body and the other pole connected to the shaft is used to create an electric field between the cylindrical body and the shaft that ionizes smoke particles in the exhaust gas and deposits them on the inner wall of the cylindrical body. A collecting chamber is provided in communication with the inside of the cylindrical body for collecting deposition of smoke particles scraped by the scraping knife off the inner wall of the cylindrical body.

Abstract: A removal device for an electrostatic precipitator which includes an ion generator, precipitator, collector and removal device for removing particles in the precipitator. A plurality of scrapers capable of linear displacement between two adjacent electrostatic plates of opposite polarities remove particles adhered thereto and scraped particles are collected in the collector for subsequent handling.

Abstract: An electrostatic precipitator including an ionization unit for ionization to charge the oily dust particles in the air flowing therein at the front, a dust precipitating unit for catching the charged oil dust particles in the air flowing from the ionization unit thereinto at the front and out therefrom at the back by means of an electrostatic field produced from a plurality of large and small electric plates reversed in conductivity, a plurality of scrapers respectively mounted in between respective two adjacent large and small electric plates for scraping away the oily dust particles precipitated on the large and small electric plates, and a collecting unit located underneath the dust precipitating unit for collecting the oily dust particles scraped away by the scrapers.