EP3843878 (A1)

A method and apparatus for reduction of HCI emission from
cement plants using cement raw meal as absorber

(22) 29.08.2019

(43) 07.07.2021

(57) Summary of the corresponding patent WO2020044288 (A1): The invention relates to a method for reduction of HCl emission from a cement plant based on a treatment of a preheater (1) and/or bypass gas stream, characterized in that a cement raw meal, as a HCl absorber, is dispersed in the gas stream(s) from which HCl is to be removed; the cement raw meal is introduced from a raw mill (6) and/or a silo (8) into a pipe with a up going gas flow; the pipe being arranged in fluid communication at a point after a gas conditioning tower (7) and/or before a particle filter unit (5) and/or in a by-pass line before particle filter (4).

(71) FLSmidth A/S (DK)

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