Acta Mechanica Slovaca 2015, 19(1):36-41 | DOI: 10.21496/ams.2015.004

Removal of Ammonium Ions from Gypsum Slurry in the Process of Desulphurisation of Flue Gases

Miroslav Příhoda¹, Mária Čarnogurská^2*, Roman Pavlov³

¹ VŠB - Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, Ostrava - Poruba, 708 00, Czech Republic

² Technical University of Košice, Faculty of Mechanical Engineering, Vysokoškolská 4, 042 00 Košice

³ Slovenské elektrárne, a. s., member of the group Enel, Thermal power plant Vojany, 076 72 Vojany

The article deals with the proposed methodology for the removal of ammonium ions from the gypsum slurry in the Vojany Slovakia (EVO) power plant. The suspension (slurry) is formed as a by-product of the treatment process of the flue gas desulphurization and denitrification, when ammonia water is being fed to the flue gas. Most of the ammonia, which does not participate in the chemical reaction, escapes together with the flue gas into the absorber of the desulfurization device. By washing such flue gases, large quantities of gypsum slurry are created, which contain ammonium ions. Gypsum slurry is admixed to the "stabilizer" in its production, where it comes into contact with the adhesive agent (CaO), whilst releasing ammonia. Based on the analysis of the current state of denitrification and desulphurization at EVO Vojany, a methodology, more precisely described in the article, was proposed for the removal of ammonium ions from the gypsum slurry.

Keywords: Denitrification, desulphurization, gypsum suspension (slurry), ammonium ions

Published: March 31, 2015  Show citation