SAMPLING PROBE FOR MEASURING OXYGEN ON STEAM GENERATORS HEATED BY COAL DUST

摘要

Samples enter the probe at holes (6). Fly-ash can block the sampling probe so the bore of the probe is cleaned regularly with a brush (4) attached at a point on a continuous chain 93) passing over pulleys (2) and driven by a motor (5). The return portion of the chain passes through a tube (8), sealed at both ends against the casing (11) to prevent leakage of air from a point outside the boiler. The collected sample is removed to the measuring cell.