Regeneration rotary kiln

A regeneration rotary kiln, comprising:

• a superheated steam generation unit that generates superheated steam;
• a tube capable of rotating about its axis and having a heating section where, while the superheated steam is being supplied thereto, carbon fiber reinforced plastic containing a matrix resin and carbon fibers is heated to generate combustible gas from the matrix resin to extract the carbon fibers from the carbon fiber reinforced plastic;
• a first combustion chamber supplied with a fuel gas and air that is placed outside the tube and that partially burns the combustible gas introduced from the heating section with the fuel gas to heat the heating section;
• and
• a second combustion chamber supplied with a fuel gas and air that burns a portion of the remaining unburned combustible gas introduced from the first combustion chamber with the fuel gas to supply heat for generating the superheated steam, wherein
• the regeneration rotary kiln recovers the carbon fibers from the carbon fiber reinforced plastic wherein the superheated steam generation unit has a waste heat recovery boiler supplied with a fuel gas and air that heats water to generate steam, and a supply tube that couples the waste heat recovery boiler and the tube via the second combustion chamber and that heats the steam to generate the superheated steam, the steam in the supply tube is heated by the heat of the second combustion chamber which is transmitted through a wall of the supply tube, and the waste heat recovery boiler burns the remaining unburned combustible gas introduced from the second combustion chamber with the fuel gas to heat the water to generate the steam.