Method of utilizing optical path difference in two-phase flow for analytical calculation of particle size gradation and solid content

A method of solid content measurement utilizing optical path difference in two-phase flow, characterized in that, said method, carried out through a laser particle size analyzer comprises the following steps:

• step 1:
• providing the laser particle size analyzer with a plurality of detectors, changing a width of measurement area of the laser particle size analyzer, and monitoring and collecting extinction values from direct source at two different optical path lengths and a scattered light intensity signal on each detector at two different optical path lengths, wherein the two different optical path lengths are defined as a long optical path length and a short optical path length, and the long optical path length is greater than the short optical path length;
• step 2:
• utilizing the scattered light intensity signal at the long optical path length to subtract the scattered light intensity signal at the short optical path length on each detector to obtain a set of new scattered light intensity signals with background subtracted;
• step 3:
• processing particle size distribution inversion calculations for the set of scattered light intensity signals with background subtracted to obtain gradation data of solid particles;
• step 4:
• processing subtraction of the logarithm of the extinction value of the short optical path from the logarithm of the extinction value of the long optical path to obtain new extinction value related data;
• step 5:
• processing calculation of the solid content based on the new extinction value related data and the gradation data obtained.