Patent ID: 6656440
Filing Date: 2003-12-02
Classification: B01D

Abstract:
A method for desulfurizing flue gas in which desulfurization is effected by bringing absorbent slurry containing limestone into contact with flue gas, comprising the steps of:classifying absorbent slurry extracted from a desulfurization absorber, returning a fine-side fluid to said desulfurization absorber, and sending a course-side fluid to a solid-liquid separator; mixing supplied limestone powder and some of filtrate obtained by said solid-liquid separator to yield limestone slurry by a solid-liquid mixer; classifying said limestone slurry, sending a small-particle fluid component thereof to said desulfurization absorber, and sending a large-particle fluid component thereof to a limestone fine grinder; and finely grinding limestone contained in said large-particle fluid component by said limestone fine grinder and sending the finely ground limestone to said desulfurization absorber.