en.Wedoany.com Reported - Flue gas treatment was once often divided into separate systems for desulfurization, denitrification, dust removal, mercury control, plume control and wastewater treatment. In coal power, steel, cement, glass, coking and waste incineration industries, however, pollutants usually appear together. If one link is poorly designed, the entire system may fail to remain compliant. Flue Gas Desulfurization and Denitrification Technology is therefore moving from single-equipment treatment toward coordinated multi-pollutant control.
International experience shows that industrial flue gas control can deliver long-term results. The European Environment Agency reports that emissions from large combustion plants in the EU fell significantly during 2004–2024, with SO₂ and dust down by more than 94% and NOx down by 74%, driven mainly by implementation of the Industrial Emissions Directive, BAT conclusions and declining fossil fuel consumption, especially coal.
In engineering practice, desulfurization controls SO₂ and some acid gases, denitrification controls NOx, dust removal captures particulate matter and some heavy metal carriers, while wet electrostatic precipitation can further reduce fine particles, acid mist and gypsum droplets. If SCR is placed in high-dust flue gas, catalyst wear and blockage may increase. If desulfurization is unstable, downstream corrosion and wet plume issues may worsen. If dust removal is weak, slurry and wastewater loads also rise.
New or retrofit projects should build a full-process model covering boiler or kiln, fuel, flue gas, pollutants, treatment systems and outlet emissions. Engineers should calculate gas volume, SO₂, NOx, dust, temperature, humidity, oxygen, chlorine and load fluctuation instead of selecting equipment by one pollutant. Mature Flue Gas Desulfurization and Denitrification Technology is not simple equipment stacking; it is system balancing among resistance, temperature, corrosion, energy use, wastewater and by-products.
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