New Sampling Method for the Determination of Concentrations of Particulate Material in Gas-Carrying Ducts

Abstract

A new sampling method for the quantitative determination of particulate material in gas-carrying ducts is presented. The method uses water as the collection and transportation medium instead of the normally applied in-(out)-stack gas filtration technique. The water is circulated in a closed-loop system formed by the sampling nozzle, probe tube and two impingers which act as collection vessels for the particulate material. The total mass of the particulate material is determined gravimetrically after evaporation of the water.

A good correlation exists between the data obtained with the standard in-stack filtration method and the described new sampling method. The new method will be especially useful in circumstances which cause severe problems with the classical filtration technique, such as high mass flow rates of particulate material and high vapour contents. The described method has successfully been applied to the determination of scrubber efficiencies.

Key Words:

• Particulate material
• stack-sampling