Dust concn. measurement in flue gas duct

摘要

A probe projects into the gas duct, to remove and return a side stream of the waste gases. A measurement head connected to the probe determines the dust content in the side stream, following which, the side stream is returned, the return tube (18) being integrated into the sample probe (5). Extn. tubes (14) and return tubes (14) are in mutual thermal contact in the sample probe (5), and are constructed as a coaxial, double-walled tube. In addn. to the sampling probe, a suitable measurement system is also claimed.