Device and method for generating high-purity hydrogen by biomass pyrolysis-chemical looping combustion

A device for generating high-purity hydrogen by biomass pyrolysis-chemical looping combustion, wherein the device comprises a biomass pyrolysis unit, a chemical looping hydrogen generation unit and a waste heat recovery unit;

• the biomass pyrolysis unit comprises a vertical bin, a screw feeder, a rotary kiln pyrolysis reactor and a high temperature filter;
• the vertical bin conveys raw materials into the rotary kiln pyrolysis reactor through the screw feeder, and the rotary kiln pyrolysis reactor is connected with the high temperature filter through a pyrolysis gas delivery pipe;
• the chemical looping hydrogen generation unit comprises a path switching system of intake gas end, at least one packed bed reactor and a path switching system of tail gas end;
• the two ends of the packed bed reactor are respectively connected with the path switching system of intake gas end and the path switching system of tail gas end;
• each packed bed reactor undergoes a different reaction stage from others, at the same moment, by the control of the path switching system of intake gas end and the path switching system of tail gas end;
• and for a packed bed reactor, it undergoes different reaction stages at different moment, by the control of the path switching system of intake gas end and the path switching system of tail gas end;
• the waste heat recovery unit comprises at least one waste heat boiler, at least one cooler and at least one gas-liquid separator;
• an outlet of the waste heat boiler is communicated with an inlet of the cooler through a first tail gas delivery pipe, and an outlet of the cooler is communicated with an inlet of the gas-liquid separator through a second tail gas delivery pipe.