火力発電プラントにおけるダスト濃度測定での非等速吸引誤差理論の適用

抄録

Errors of anisokinetic sampling in dust concentration measurements were investigated for flue gases from utility boilers in two thermal power plants. The fuels burned in the two power plants are heavy oil and coal respectively. The measurements were carried out in the range of 0.25 < V_o/V_s < 2.0, where V_o is the gas velocity in duct, and V_s is its suction velocity during anisokinetic sampling. Although the errors at the oil combustion plant were negligible since dust particles were very small, the results were seemed to be in agreement with the evaluation equation based on D_p50. However, the errors at the coal combustion plant were significant and in good agreement with the evaluation based on D_p50 and size distribution of particles, Davies Eq. and Belyaev Eq..