Treatment apparatus and treatment method for raw material

A treatment apparatus for a raw material, comprising:

• a fluidized-bed furnace having a pyrolysis chamber and a combustion chamber therein, the pyrolysis chamber and the combustion chamber being separated by a partition wall inside the fluidized-bed furnace;
• an electrolysis device configured to electrolyze water to generate hydrogen and oxygen;
• a methanation reactor configured to produce methane from carbon dioxide discharged from the combustion chamber and the hydrogen;
• a first fluidizing-gas supply line configured to supply a first fluidizing gas to the pyrolysis chamber;
• and
• a second fluidizing-gas supply line configured to introduce a second fluidizing gas to the combustion chamber, the second fluidizing gas including the oxygen and a part of the carbon dioxide;
• a hydrogen holder configured to store the hydrogen generated by the electrolysis device, wherein the hydrogen holder is arranged between the electrolysis device and the methanation reactor;
• a hydrogen flow-rate control valve located between the hydrogen holder and the methane reactor;
• an oxygen holder configured to store the generated electrolysis device, wherein the oxygen holder is arranged between the electrolysis device and the combustion chamber;
• an oxygen flow-rate control valve located between the oxygen holder and the combustion chamber;
• a controller configured to regulate an opening degree of the hydrogen flow-rate control valve based on a measured value of the flow rate of the carbon dioxide flowing into the methanation reactor to thereby control a flow rate of the hydrogen delivered to the methanation reactor,
• wherein the controller is further configured to regulate opening degree of the oxygen flow-rate control valve and thus a flow rate of the oxygen to the combustion chamber so as to maintain a temperature in the combustion chamber within a predetermined range.