[Emission Characteristics of Residential Coal Combustion Flue Gas in Beijing]

Honeycomb briquet,biomass briquettes and bituminous coal from suburb of Beijing were chosen as testing samples to carry out combustion experiments. The characteristics of inorganic pollutant emission factors and VOCs emission factors released from the flue gas were studied. The results showed that under the condition of sufficient combustion, the average emission factors of SO₂ from these three types of coal respectively were 1.50,1.91,1.62 kg·t^-1;NO 0.420,0.901,2.20 kg·t^-1;CO 22.4,37.3,87.3 kg·t^-1. Combustion emission factors of gaseous pollutants for NO and CO were in the order of bituminous coal > biomass briquettes > honeycomb briquet. SO₂ emission factors were in the order of biomass briquettes > bituminous coal > honeycomb briquet. The 2014 emissions inventory of the three civil coal combustion pollutants in Beijing was obtained. Bituminous coal emissions of SO₂ was more than 5.5×10³ tons,NO was more than 7.5×10³ tons,CO was more than 290×10³ tons. All these coal types released more kinds and higher concentrations of volatile organic compounds in ignition phase and damp down stage. VOCs emission factor was the highest during ignition phase, followed by damp down phase.