The invention relates to an
ammonia process
flue gas treatment method for acidic
tail gas. The method includes the steps of: 1) controlling the
sulfur dioxide concentration of
tail gas entering an absorption
tower at a level of less than or equal to 30000mg / Nm<3>; 2) arranging process water in an absorption
tower entrance
flue or in the absorption
tower or cooperating with a
ammonium sulphate solution to perform
spray cooling; 3) disposing an oxidation section in the absorption tower, setting an oxidation
distributor at the oxidation section to achieve oxidation of a desulfurized absorption liquid; 4) arranging an absorption section in the absorption tower, utilizing an absorption liquid
distributor in the absorption section to realize desulfurization spray absorption by an
ammonia-containing absorption liquid, which is fed through an
ammonia storage groove; 5) arranging a
water washing layer at an absorption section upper part in the absorption tower, washing the absorption liquid in the
tail gas by the
water washing layer and reducing the absorption liquid escape; and 6) setting a
demister at the upper part of the
water washing layer in the absorption tower to control the mist drop content in the purified tail gas. Employment of the Claus
sulfur recovery and ammonia process desulfurization integrated desulfurization technology in the
coal chemical industry can reduce the
investment cost of after-treatment, the process can be simpler, and factory
environmental protection treatment can form an intensive
advantage.