PM2.5 aerosol concentration and separation device

The utility model discloses a PM2.5 aerosol concentration and separation device which comprises a concentration and separation lower shell, a concentration and separation upper shell, a connecting flange and a sealing ring which are detachably connected, the bottom end of the concentration and separation lower shell is communicated with a shell gas inlet pipe seat, and the top end of the concentration and separation upper shell is communicated with a shell gas outlet pipe seat and a waste gas discharge pipe seat. A nozzle device is arranged between the shell air inlet pipe seat and the shell air outlet pipe seat; the condensation water discharging device is arranged on the lower concentration and separation shell; heavy PM2.5 aerosol meeting the enrichment requirement is sprayed out through the nozzle device and the shell gas outlet pipe base to participate in enrichment, the rest PM2.5 aerosol is discharged through the waste gas discharging pipe base, and equivalently, the enriched PM2.5 aerosol is concentra