Unpolished rice tempering and enzyme deactivation equipment

The invention relates to unpolished rice tempering and enzyme deactivation equipment, comprising a tempering box, a blanking opening and a discharging opening on the tempering box, conveying belts placed inside the tempering box, hot air square pipes and cold air square pipes below the conveying belts. Unpolished rice falls down to the conveying belts from the blanking opening and is conveyed to the discharging opening to be conveyed out; the tempering box is internally provided with five layers of conveying belts; all the layers of conveying belts are arrayed in a staggered manner; the hot air square pipes and the cold air square pipes are arrayed below each layer of conveying belt; the hot air square pipes are connected with a saturated steam generator through a pipeline and the cold air square pipes are connected with an air cooler through a pipeline; air blowing openings are distributed on the hot air square pipes and the cold air square pipes; the conveying belts are provided with small holes for an air flow to pass through; and the quantities and the lengths of the hot air square pipes and the cold air square pipes on each conveying layer are different. The unpolished rice tempering and enzyme deactivation equipment has good tempering effect and can be used for killing worms, mildews and bacteria hidden in the unpolished rice in a tempering process and passivating lipolytic enzymes such as lipoxidase and lipase.