Dust removal equipment and principles mainly contain the following categories: biological nano-film, cloud dust suppression, wet dust collection, gravity dust removal, inertia dust removal, cyclone dust removal, bag dust removal, electrostatic dust removal and so on.
Denitrification is now the main method of denitrification SCR denitrification, refers to the urea solution in the exhaust pipe mixing zone in the event of high-temperature flue gas decomposition to generate NH3 as a reductant, the use of high selective reductivity of NOX, in the catalytic reaction zone to generate harmless nitrogen (N2) and water (H2O), the reaction mechanism is as follows. The reaction principle is as follows:
Urea is pyrolyzed and hydrolyzed to generate ammonia, which provides raw material for the reaction.
Urea specific reaction:
Urea pyrolysis reaction: CO (NH2) 2 → NH3 + HNCO (1)
Urea hydrolysis reaction: HNCO + 2H2O → NH3 + CO2 (2)
Reaction of denitrification principle:
Standard SCR reaction: 4NH3 + 4NO + O2 → 4N2 + 6H2O (3)
Fast SCR reaction: 4NH3+2NO2+O2 → 3N2+6H2O (4)
Slow SCR reaction: 8NH3+6NO2 → 7N2+12H2O (5)