What is the working principle of desulfurization and denitrification?

The working principle of desulfurization and denitrification refers to the reduction of generated NOX to N2, so as to remove NOX from flue gas, which can be divided into wet denitrification and dry denitrification according to the treatment process;

It mainly includes: acid absorption method, alkali absorption method, selective catalytic reduction method, non-selective catalytic reduction method, adsorption method, ionic body activation method and so on. Some researchers at home and abroad have also developed methods to treat NOX waste gas with microorganisms;

Simply speaking, desulfurization and denitrification is the process of neutralizing acid with alkali. Desulfurization means: remove sulfur dioxide contained in boiler flue gas; Out-of-stock means: removing nitrogen oxides contained in boiler flue gas;

The process of desulfurization is to make alkaline desulfurizer (such as limestone, CaO, sodium hydroxide, etc. ) into slurry, mixed with boiler flue gas. Sulfur dioxide becomes acidic when it meets water, and reacts with alkaline desulfurizer to generate final desulfurization products such as CaSO4 (calcium sulfate). The principle of denitrification and desulfurization is similar, that is, the denitrator is replaced with ammonia or urea.