A High Volume Stack Sampler

Abstract

This paper deals with the development design, and trial application of a sampling train to gather a relatively large amount of particulate sample in a short period of time. With air pollution sources installing control equipment to reduce emissions to the required low levels, it becomes necessary to use a sampling device which can collect a representative sample in a reasonable period of time. Some of the sampling trains currently being specified are expensive, awkward, and nearly impossible to use under field conditions. The high-volume train overcomes ail of these shortcomings and has some additional advantages. It uses the same glass fiber filter that is specified for ambient air particulate sampling so the emission test results are directly comparable to ambient air sampling data. The laboratories currently weighing and analyzing the glass filters need no additional equipment for the emission sampling analysis. The sample collected by the high-volume probe may be analyzed microscopically for size and characteristics of the particles. This is very important if control equipment is to be specified for the process or source. The high-volume sampler was evaluated on field tests of wood fired boilers, incinerators, wigwam burners, asphalt batching plants, seed cleaning plants, and wood fiber filtration systems. The results of several typical tests using the sampler on these sources are included in the paper.