Pyrolysis apparatus and pyrolysis method

Abstract

The pyrolysis apparatus includes a fluid bed furnace (1), a first partition wall (11) dividing inside of the fluid bed furnace (1) into a pyrolysis chamber (4) and a combustion chamber (5), a second partition wall (12) dividing the combustion chamber (5) into a main combustion chamber (6) and a settling combustion chamber (7), a first gas diffuser (15), a second gas diffuser (25), and a third gas diffuser (35) configured to supply a first fluidizing gas, a second fluidizing gas, and a third fluidizing gas to the pyrolysis chamber (4), the main combustion chamber (6), and the settling combustion chamber (7), respectively, a first raw-material supply device (71) configured to supply a first raw material to the pyrolysis chamber (4) with a first supply amount, a second raw-material supply device (72) configured to supply a second raw material to the pyrolysis chamber (4) with a second supply amount, and an operation controller (200) configured to independently control operations of the first raw-material supply device (71) and the second raw-material supply device (72).

1 - 16 . (canceled) 
     
     
         17 . A pyrolysis method of pyrolyzing a raw material using a pyrolysis apparatus having a fluidized-bed furnace containing a fluidized medium therein, inside of the fluidized-bed furnace being divided into a pyrolysis chamber, a main combustion chamber, and a settling combustion chamber, said method comprising:
 supplying a first fluidizing gas to the pyrolysis chamber to form a first fluidized bed in the pyrolysis chamber;   supplying a first raw material to the pyrolysis chamber with a first supply amount, while supplying a second raw material to the pyrolysis chamber with a second supply amount, the second raw material having a lower ratio of carbon to hydrogen and a lower ratio of carbon to oxygen than those of the first raw material;   pyrolyzing the first raw material and the second raw material in the pyrolysis chamber;   combusting a residue of the first raw material and a residue of the second raw material in the main combustion chamber, while supplying a second fluidizing gas to the main combustion chamber to form a second fluidized bed in the main combustion chamber; and   moving a fluidized medium from the main combustion chamber to the pyrolysis chamber through the settling combustion chamber, while supplying a third fluidizing gas to the settling combustion chamber to form a third fluidized bed in the settling combustion chamber.   
     
     
         18 . The pyrolysis method according to  claim 17 , further comprising controlling a ratio of the first supply amount to the second supply amount based on a temperature in the main combustion chamber or a temperature in the settling combustion chamber. 
     
     
         19 . The pyrolysis method according to  claim 17 , further comprising supplying at least one of the first raw material and the second raw material to the main combustion chamber, while supplying the first raw material and the second raw material to the pyrolysis chamber. 
     
     
         20 . The pyrolysis method according to  claim 17 , further comprising regulating a temperature or a flow rate of the third fluidizing gas such that a temperature in the settling combustion chamber is within a predetermined temperature range. 
     
     
         21 . The pyrolysis method according to  claim 17 , wherein
 a heat transfer tube through which a cooling medium flows is disposed in the settling combustion chamber, and   the pyrolysis method further comprises regulating a flow rate of the cooling medium such that a temperature in the settling combustion chamber is within a predetermined temperature range.   
     
     
         22 . The pyrolysis method according to  claim 21 , wherein the third fluidizing gas is supplied into the settling combustion chamber at different flow rates from a plurality of wind boxes disposed under the settling combustion chamber to swirl the fluidized medium forming the third fluidized bed. 
     
     
         23 . The pyrolysis method according to  claim 17 , wherein the first fluidizing gas contains at least one of carbon monoxide gas, carbon dioxide gas, hydrogen gas, hydrocarbon gas, vapor, and nitrogen gas. 
     
     
         24 . A pyrolysis method of pyrolyzing a raw material using a pyrolysis apparatus having a fluidized-bed furnace containing a fluidized medium therein, inside of the fluidized-bed furnace being divided into a pyrolysis chamber, a main combustion chamber, and a settling combustion chamber, said method comprising:
 supplying a first fluidizing gas to the pyrolysis chamber to form a first fluidized bed in the pyrolysis chamber;   supplying a raw material to the pyrolysis chamber;   pyrolyzing the raw material in the pyrolysis chamber;   combusting a residue of the raw material in the main combustion chamber, while supplying a second fluidizing gas to the main combustion chamber to form a second fluidized bed in the main combustion chamber;   moving a fluidized medium from the main combustion chamber to the pyrolysis chamber through the settling combustion chamber, while supplying a third fluidizing gas to the settling combustion chamber to form a third fluidized bed in the settling combustion chamber; and   controlling a temperature of the settling combustion chamber within a predetermined temperature range.   
     
     
         25 . The pyrolysis method according to  claim 24 , further comprising regulating a temperature or a flow rate of the third fluidizing gas such that the temperature in the settling combustion chamber is within the predetermined temperature range. 
     
     
         26 . The pyrolysis method according to  claim 24 , wherein
 a heat transfer tube through which a cooling medium flows is disposed in the settling combustion chamber, and   the pyrolysis method further comprises regulating a flow rate of the cooling medium such that the temperature in the settling combustion chamber is within the predetermined temperature range.   
     
     
         27 . The pyrolysis method according to  claim 26 , wherein the third fluidizing gas is supplied into the settling combustion chamber at different flow rates from a plurality of wind boxes disposed under the settling combustion chamber to swirl the fluidized medium forming the third fluidized bed.