Gas analyzer for dry/dusty kilns

Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...

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Details

7386324, 7386383, G01N 124, G01D 1800

Patent

active

045789860

ABSTRACT:
A system for the analysis of gas samples from a dry and dusty environment, such as the interior of a lime kiln, includes a probe which extends relatively far into the kiln, to avoid the adverse effect on the measurements of extraneous, i.e., "tramp", air which may leak into the kiln. A sample of the gas is drawn through an isolation tube which extends from the probe chamber in a direction for sample flow opposite to the flow of gases in the kiln. The sample is passed through a filter, within the probe chamber; pumped to a conditioning system, in which the sample gas is cleaned and cooled; and then pumped to gas analysis cells for the analysis of the individual gases.
The probe chamber is mounted at the end of a support pipe which carries a first tube, connected to the filter. This pipe serves as a path to introduce purge air for the filter and also calibration gases for test purposes. The actual gas sample is withdrawn through an innermost pipe which terminates just upstream of the inlet of the filter. A third tube, connects directly into the probe chamber, and not through the filter, and through which purge air or span gases may be pumped.

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patent: 4004882 (1977-01-01), Byrne et al.
patent: 4047437 (1977-09-01), Brooks
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patent: 4094187 (1978-06-01), Navarre, Jr.
patent: 4150495 (1979-04-01), Stern
patent: 4161883 (1979-07-01), Laird et al.
patent: 4279142 (1981-07-01), McIntyre
patent: 4481833 (1984-11-01), Bajek
patent: 4485684 (1984-12-01), Weber et al.

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