Impeller material feeder

The utility model relates to a material feeder with an impeller which is used for metering and feeding material, particularly the discharging device of a dry dust removal system. The utility model comprises a transmission mechanism, a housing 1 with a feed port 2 and a discharge port 7, end caps 14 on both sides of the housing 1, and an impeller 9 which is installed in the housing 1 and is supported by the end caps 14. The feed port 2 is in stagger arrangement with the impeller. The impeller 9 is tightly engaged with the feeding cavity 13 of the housing in radial direction, but is separated from the discharge cavity 10 of the housing; the gap between the impeller 9 and the discharge cavity 10 is relatively large. A driving device comprises a multi-stage speed changing motor and a stepped pulley; the driving device can change the rotation speed of the impeller. The utility model has the advantages of simple structure, reliable sealing and energy saving.