Dual-piston pressure-controlling type material steam explosion method and devices

The invention discloses a dual-piston pressure-controlling type material steam explosion method comprising the following steps of: feeding materials into a tank body from a feed opening of the tank body; steaming towards the tank body at the rear part of the closed feed opening; when the materials are heated to the steam explosion temperature, pushing a boosting piston in the tank body to compress the materials to allow the tank body to boost to the steam explosion pressure; and quickly releasing pressure to enable the materials to expand and burst and discharging the materials. The invention discloses a steam explosion device comprising the tank body, wherein a boosting piston and a pressure-relief piston are arranged in the tank body; the feed opening, a steam inlet and a discharging port are arranged on the tank body between the initial positions of the boosting piston and the pressure-relief piston; a valve is arranged on the steam inlet; The invention also discloses an another steam explosion device comprising a tank body, wherein a boosting piston and a pressure-relief piston are arranged in the tank body; a feed opening and a discharge opening are arranged on the tank body between the initial positions of the boosting piston and the pressure-relief piston; a heating jacket is arranged on the tank body between the feed opening and the discharge opening and is provided with a heating medium inlet and a heating medium outlet; and valves are respectively arranged on the heating medium inlet and the heating medium outlet.