PREVENTING METHOD OF SCALE AND DUST ADHERING TO CONVERTER EXHAUST GAS DUST COLLECTING EQUIPMENT

摘要

PURPOSE:To improve the preventive effect for scale and dust to adhere to dust collectors with a few dust adhering preventive material by supplying therewith separately to the water supply portion of the water supply nozzles of the primary and secondary dust collectors in converter exhaust gas dust collecting equipments. CONSTITUTION:Exhaust gas from a converter 1 is collected with a food 2 and fed through a duct 3, and dust is removed with the primary dust collector 4 and the secondary dust collector 5 and the gas is cooled and introduced into a chimney 17 or a gas holder 19. At this time, a nozzle 41 of the primary dust collector 4 is supplied of water from a slurry tank 6 from the secondary dust collector 5, and a nozzle 51 of the secondary dust collector 5 is supplied of water from a dust collecting water tank 8. Scale and dust preventive material, such as high polymer electrolyte, for example, Na salt of polyacrylic acid, or sodium ethylenediaminetetraacetic acid is added from tanks 22 and 20 separately to the secondary slurry tank 6 by a large amount and to the dust collecting water tank 8 by a small amount to supply the primary and secondary dust collectors. This method enables to prevent efficiently the dust collector from adhering with scale and dust with a small amount of the preventive material.