Forward scattering laser particulate sensor

Details Forward scattering laser particulate sensor Forward scattering laser particulate sensor

1983-07-08

1984-11-13

Arnold, Bruce Y.

Optics: measuring and testing

By particle light scattering

With photocell detection

G01N 2100

Patent

active

044822472

ABSTRACT:
A sensor employs a laser to obtain a collimated light beam for transmission across the gas effluent of a catalytic cracking process. Particulate matter entrained in the gas flow forward scatters light energy to a collecting aperture which, in turn focuses the scattered light on a first photodetector. A second photodetector receives directly transmitted light energy. A ratio between the output signals of the two photodetectors is derived and presented to a threshold level detector. If the magnitude of the scatter exceeds a predetermined level it is concluded that a catalyst load dump has occurred. The optical system is carefully selected to ensure that only light energy scattered from a sample volume within the entrained gas flow reaches the first photodetector. This is important because it prevents particulate matter on the surfaces of the transparent windows from affecting the operating of the sensor.

REFERENCES:
patent: 1969626 (1934-08-01), Simon et al.
patent: 3310680 (1967-03-01), Hasegawa
patent: 3662176 (1972-05-01), Kamentsky et al.
patent: 3666359 (1972-05-01), Lee
patent: 3713743 (1973-01-01), Simms
patent: 3743430 (1973-07-01), Riggs
patent: 3785735 (1974-01-01), Friedland et al.
patent: 4017186 (1977-04-01), Shofner et al.
patent: 4099875 (1978-07-01), McMahon et al.
patent: 4175865 (1979-11-01), Horvath et al.
patent: 4249244 (1981-02-01), Shofner et al.
patent: 4284412 (1981-08-01), Hansen et al.

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