I. Different referents

1. Flue gas denitrification technology SCR: refers to the reduction of NOX generated into N2 to remove duNOX in flue gas. According to the treatment process, it can be divided into wet denitrification and dry denitrification.

2. SNCR/SCR: Also known as flue gas desulfurization and denitrification technology, it is a boiler flue gas purification technology applied to the chemical industry of formation of multi-nitrogen oxides and sulfur oxides. Two, the principle is different

1. Flue gas denitrification technology SCR: take the furnace or the precalciner of the cement industry as the reactor, spray the original dao reducing agent containing amino into the furnace, react with NOx in the flue gas, and generate ammonia and water.

2. SNCR/SCR: In the reactor, the flue gas is irradiated by high-energy electron beam, and radiation reactions occur in the flue gas, such as N2, O2 and water vapor, generating a large number of ions, free radicals, atoms, electrons and various excited atoms, molecules and other active substances. SO2 and NOX in the flue gas are oxidized into SO3 and NO2.

Three, different characteristics

1, flue gas denitrification technology SCR: low basic investment, simple equipment and process, high NOX removal efficiency, no waste water and waste treatment, not easy to cause secondary pollution.

2. SNCR/SCR: The system is simple, easy to operate, and the process is easy to control; It has good adaptability and load tracking for the change of smoke and gas content with different sulfur content. The byproducts are a mixture of ammonium sulfate and ammonium nitrate and can be used as fertilizer.