Boiler denitration is divided into inside the furnace denitration and outside the furnace denitration, outside the furnace is SCR denitration technology, these three kinds of relatively mature denitration technology. Boiler denitration is mainly divided into HNCR (polymer denitration), SNCR (urea denitration), SCR (selective catalytic reduction technology) three denitration methods.
scr denitrification system can treat nitrogen oxides (NOx) in exhaust gas, so that it meets national environmental protection emission standards or local environmental protection emission standards. The main application areas are denitration of generator set, distributed energy nitrogen oxide treatment, gas turbine SCR denitration, biomass combustion medium temperature denitration and industrial waste gas high temperature denitration treatment. Can control farm organic exhaust gas generator denitration. The application condition is in the range of 180-600 degrees, and the appropriate environmental protection standard scheme can be selected according to the actual working condition and the requirements of the owner.
Selective Catalytic Reduction: Selective catalytic reduction catalyst (SCR) and reducing agent urea solution (or ammonia, NH3·H2O) are the core purification components. This filter unit selectively reduces nitrogen oxides (NOx) from the exhaust gas to nitrogen.
SCR reaction is a complex, multi-component catalytic reduction reaction, the main reactions are as follows:
NH3·H2O→NH3↑+H2O (Urea hydrolysis reaction)
NO+NO2+2NH3→2N2↑+3H2O (nitrogen oxide reduction reaction)
4NO+O2+4NH3→4N2↑+6H2O (Nitric oxide reduction reaction)
2NO2+O2+4NH3→3N2↑+6H2O (nitrogen dioxide reduction reaction)
Post time: Dec-20-2023