IC (internal circulation) anaerobic reactor capable of manufacturing granular sludge and automatically collecting sludge

The utility model discloses an IC (internal circulation) anaerobic reactor, and in particular relates to an IC anaerobic reactor capable of manufacturing granular sludge and automatically collecting sludge. The IC anaerobic reactor comprises a bottom plate, a cylinder body, a top plate, an inverted round-platform division plate, a first-stage three-phase separator, a second-stage three-phase separator, an upflow pipe, a gas collecting pipe, a downflow pipe, a biogas output pipe, a sludge biogas discharge pipe, a bottom layer sludge discharge pipe, a header sludge discharge pipe, a sludge collecting branch pipe, a sludge collecting header pipe, an annular water outlet groove, a water inlet pipe, a gas-liquid separator, a vertical circulation cylinder positioned in a mixing zone, a baffle plate positioned in a first-stage reaction zone and a sludge bucket positioned in a second-stage reaction zone. The IC anaerobic reactor disclosed by the utility model can produce a large amount of granular sludge with large p