In-line analyzer for particle size distribution in flue gas

Details In-line analyzer for particle size distribution in flue gas In-line analyzer for particle size distribution in flue gas

1991-03-01

1992-02-25

Williams, Hezron E.

Measuring and testing

Gas analysis

Solid content of gas

7386322, 738655, G01N 1502

Patent

active

050902334

ABSTRACT:
A particle-size distribution analyzer in a vent gas or flue gas which can be in a gas carrying line of a dust- and/or mist-producing process is provided. The analyzer comprises: a series of particle-size classifying units each consisting of a gas-ejection nozzle of an opening having a diameter different from the others and an impaction plate mounted on a revolvable turret in such a fashion that the series of the units can communicate with a suction nozzle in the gas flow line one by one successively in a decreasing order of the nozzle opening diameter; and a light-scattering particle-concentration detecting system which gives the concentration data after particle-size classification as a function of the cut-off size of the particles contained in the gas. In another embodiment, a heater to evaporate the liquid constituent in the mist particles and a second concentration-detecting system are provided downstream of the first concentration-detecting system so that measurements of the particle size distribution can be conducted for the dust particles and mist particles separately.

REFERENCES:
patent: 4590792 (1986-05-01), Chiang
patent: 4640140 (1987-02-01), Burghoffer et al.

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