FLUE GAS PURIFYING PROCEDURE

摘要

A procedure for purifying flue gases, wherein into the firebox of a boiler (4) is conveyed an absorbent substance and said substance is allowed to react with the sulphur in the flue gases, the flue gases are further conveyed from the firebox of the boiler by an exhaust passage (a) to a pre-separator (8), which separates from the flue gas the absorbent that has not reacted with sulphur and conveys said non-reacted product to a separate hydrating unit. The solid matter separated from the pre-separator (8) is hydrated and converted into a form which is reactive with sulphur and transported concurrently with the flow to a reactor (16) which is located after the flue gas pre-separator (8) as referred to the direction of travel of the flue gases.