試験ダクト設備を用いた煙道用ダスト計の性能評価

抄録

This paper describes the configuration and performance of the developed duct for evaluation tests and examples of evaluation measurements. In addition, the equivalence with the gravimetric measurement that cannot be accurately evaluated for the electrostatic detection type dust meter, which was a pending issue when the JIS standard was established, is discussed. As a result, the charging of dust in the test duct was confirmed and was assumed to be caused by triboelectrification with obstacles such as agitator plates and rectifying wire mesh. And since an exponentially decreasing relationship appeared between the dust concentration in the duct and the dust charge, this change in dust charge disrupted the linear relationship between the dust meter readings and the gravimetric measurements, making evaluation difficult. This indicates that when conducting equivalency tests using test ducts, dust charging should be fully considered, and in some cases, dust charge should be measured and appropriately corrected.