Method for reducing Sox emissions from an installation of manufacture of clu00ecnquer cement and said installation

摘要

Method for reducing emission of so ~ x ~ a fabrication facility clu00ecnquer cement and said installation.The present invention relates to a method, as well as a facility for emission reduction of only ~ x ~ of a plant for manufacturing cement clinker.Through which a raw cement powder is pre heated and burned in a plant comprising a cyclone preheater (1) and a furnace (7).The method is peculiar in that a catalyst in the form of composed of chloride and / or a mixture of several compounds of chloride is introduced in the pre heater (1),In the stage of cyclone more superior or close to the higher (2)3); the catalyst is directed descendentemente the pre heater (1) for the oven (7); a partial quantity of flow of the exhaust gas of the furnace containing the catalyst in the form of vaporized material is extrAida of the furnace (7); the flow of the exhaust gas extracted is cooled.So that the catalyst is present in the solid form; the solid material is separated from the exhaust gas stream cooled, and in which at least some amount of solid material separated conThe catalyst is recycled into a new introduction in the pre heater (1). Thus is obtained an effective reduction in the emission of so ~ 2 ~.The reason for this is that compounds of chloride and / or a mixture of several compounds of chloride will promote the reaction of catalytic form so ~ 2 ~ with Cao.For the formation of the case ~ 3 ~ and will further promote the reaction of so ~ 2 ~ with CaCO ~ 3 ~ for the formation of the case ~ 3 ~ and Co ~ 2 ~.Since a reagent, notably the CaCO ~ 3 ~ is present in large quantity, the reduction of only ~ 2 ~ can be carried out without any use of chemical products with strangers.