System and method for preparing carbon nanofiber and hydrogen through continuous microwave pyrolysis

A system for preparing carbon nanofiber and hydrogen through continuous microwave pyrolysis, comprising:

• a melting and feeding apparatus configured to heat and melt materials;
• a microwave pyrolysis apparatus which is configured to perform catalytic pyrolysis on the materials and comprises a material inlet, a pyrolysis gas outlet and a carbon product outlet, the material inlet being connected with a material outlet of the melting and feeding apparatus, the microwave pyrolysis apparatus further comprising a roller, microwave generation apparatuses being arranged in the roller, a fixed shell which forms a cavity with an outer wall of the roller being arranged on an outer side of the roller, the material inlet and a wave absorbing catalyst inlet being formed in an upper portion of the fixed shell, the carbon product outlet being formed in a lower portion of the fixed shell, and an upper end scraper assembly being arranged on an inner wall of the fixed shell and configured to guide the materials to wrap the rotating roller to form a material film and meanwhile guide a catalyst to wrap the material film to form a catalyst film;
• a pyrolysis gas purification and utilization apparatus which is connected with the pyrolysis gas outlet and is configured to carry out hydrogen purification and residual gas separation on pyrolysis gas generated by catalytic pyrolysis;
• a power generation apparatus which comprises a small internal combustion engine and a generator, the small internal combustion engine utilizing residual gas as fuel and conveying smoke generated by combustion to the melting and feeding apparatus to be used as a heat source for melting the materials;
• and
• a carbon product collecting apparatus, an inlet of the carbon product collecting apparatus being connected with the carbon product outlet, the carbon product collecting apparatus being configured to recover solid materials pyrolyzed by the microwave pyrolysis apparatus, air being heated through waste heat of the solid materials, and the heated air being supplied to the small internal combustion engine for auxiliary combustion.