Characteristics Of Typical Stationary Combustion Source Particulate Matter Emissions

The pollutant emitted from various stationary sources is one of the important sources of airpollution. As being short of essential measurement and instruments, it is relatively weak of themeasurement and study of inhalable particles, which is the typical representation of the atmosphericalparticulate matters emitted from stationary sources in China. In ordor to measure and analyze theemission status and characteristics of particulate matters emitted from typicle stationary sources, thedilution tunnel system, which is advanced in the world, was designed and utilized to study the particlesize distribution and the main chemical components. PM₁₀ and PM₂₅ emitted from combustion boilersof coal-fired power plant, combustion boiler of waste-to-energy plant and burning-in kiln of glass plantwere collected. The main components in PM₁₀ and PM₂₅, such as ions, elements, EC/OC, PAHs andDioxins, were analyzed. It is the first time to utilize the most advanced high time-space resolutions sizedistribution analyzers in China to obtain the information of the size distribution of 5.6nm～30μmparticles. The results show that the dilution tunnel system runs steadily and the sampling is veracious.The main water-soluble ions were Ca²⁺, SO₄^2-, CI in the particles emitted from coal-fired power plant,Na⁺, Cl^-in the particles emitted from waste-to-energy plant and Na⁺, SO₄^2- in the particles emitted fromglass plant. The contribution of carbon to the the particle mass was remarkable and the organic carbonwas dominant. More than 130 kinds of 2～7-rings PAHs and 13-16 kinds of priority PAHs were found inthe samples. The concentration of BaP exceeded the intergrated emission standard of air pollutants ofChina, and it is should be paid attention. The waste-to-energy plant emitted a large amount of Dioxins inwhich the most TEQ was contributed by PCDF, and the TEQ of 2,3,4,7,8-PCDF and 1,2,3,7,8-PCDDwere about 43% of the total TEQ. The particle size distribution of coal-fired power plant showed themass concentration peaks appeared in Nucleation Mode, Accumulation Mode and CoarseMode. Although the mass concentration of ultrafine particles (Dp＜0.1μm) was less than2% of the overall mass concentration, the number concentration of these emissions wasdominated by ultrafine paticles, which was about 99%. The ultrafine particle concentrationemitted from the boiler using low NOx combustor was about 10 times higher than thatusing normal combustor. At the same time, to the different combustor, the concentrationdistribution peaks were very different in number, figure and location. It is very significantto find out the emission characteristics of the typical stationary sources for the study on allkinds of pollution effect factor and the establishment of the emission controlmeasurements.