Apparatus for measuring the particulate matter in the flue gas o

Details Apparatus for measuring the particulate matter in the flue gas o Apparatus for measuring the particulate matter in the flue gas o

1989-10-20

1991-04-23

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

73116, F01N 300

Patent

active

050090640

ABSTRACT:
An apparatus for measuring particulate matter in a flue gas or exhaust gas of a combustion process comprising means for transmitting a beam of light between an optical transmitter and an optical receiver. The light passes through two diametrically opposed light slits closed by transparent bodies in the wall of the tail pipe and crosses through a flow of exhaust gas carried in the tail pipe. The attenuation of intensity of the light beam is a measure of the particulate matter. When the measuring apparatus is used to measure a soot concentration in an exhaust gas of internal combustion engines of a vehicle, it is mounted directly on the tail pipe, and the transparent bodies are heated in the vicinity of the faces acted upon by the exhaust gas flow to a temperature above the soot burn-off temperature. As a result, adulteration of the measured value by soot deposits in the measurement path to the transparent bodies is prevented, and continuous operation of the measuring apparatus is assured.

REFERENCES:
patent: 3362387 (1968-01-01), Neumann
patent: 3384746 (1968-05-01), Benz
patent: 4501138 (1985-02-01), McCandless

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