METHOD AND APPARATUS FOR DETERMINING COLLECTION EFFICIENCY OF FILTER DEVICE Russian patent published in 2011 - IPC G01M3/20 B01D65/10 

FIELD: physics.

SUBSTANCE: when determining collection efficiency and/or checking air-tightness of a filter device for collecting dust and aerosols from volume flow of a gas, a test aerosol is fed into the stream of the dirty gas and the number or concentration of particles in the stream of dirty gas after the filter element is determined. The aerosol is fed using the distribution device of a feeder, where multiple fractional volumetric streams containing the test aerosol are fed from the distribution device into the stream of dirty gas with uniform distribution on the cross-section of the stream through at least one shaft, the longitudinal direction of which passes perpendicular to the direction of flow of the stream of dirty gas.

EFFECT: high accuracy of testing.

9 cl, 5 dwg