Patent ID: 8262279

Claim:
A recirculation system for coarse particle size analysis in a wet-type particle size analyzer, in which a liquid supply pump for supplying liquid from a liquid supply tank to a mixer is provided, a discharge port connected with a side of a recirculation pump and discharging a mixture liquid mixed with particles in the mixer is provided, a pipe line connected with the other side of the recirculation pump is branched and coupled to a liquid supply line connected to the supply pump, a recirculation line for discharging the mixture liquid to the mixer, a first analysis line connected with a side of a particle size analyzer and a discharge line for discharging the mixture liquid to an outside of the recirculation system, and a second analysis line connected with another side of the particle size analyzer and discharging from the particle size analyzer to the mixer, the recirculation line and the second analysis line discharging the mixture liquid to an upper inputting part, wherein two rotatable baffles are attached to both side walls of the mixer, one baffle is rotated by a flow velocity of the mixture discharged from the recirculation line and the other baffle is rotated by a flow velocity of the mixture discharged from the second analysis line, and rotation directions of the two baffles are opposite each other.