Fuel gasification system

A gasification furnace comprising:

• a gasification chamber for pyrolyzing and gasifying a fuel to produce combustible gas and char;
• a char combustion chamber for combusting the char supplied from said gasification chamber;
• a settling gasification chamber in said gasification chamber and having a supply opening located below an interface of a fluidized bed of said gasification furnace, said settling gasification chamber being shaped and arranged to allow a fluidizing medium and the char to be supplied from said gasification chamber to said char combustion chamber by descending through said settling gasification chamber and passing through said supply opening into said char combustion chamber;
• and
• a partition wall separating said char combustion chamber from said gasification chamber, said partition wall having a return opening located below the interface of the fluidized bed of said gasification furnace for allowing the fluidizing medium to be returned directly from said char combustion chamber to said gasification chamber.

A gasification furnace comprising:

• a gasification chamber for pyrolyzing and gasifying a fuel to produce combustible gas and char;
• a char combustion chamber for combusting the char supplied from said gasification chamber;
• a partition wall separating said gasification chamber from said char combustion chamber, said partition wall having a supply opening located below an interface of a fluidized bed of said gasification furnace for allowing a fluidizing medium and the char to be supplied directly from said gasification chamber to said char combustion chamber;
• and
• a settling char combustion chamber in said char combustion chamber and having a return opening located below the interface of the fluidized bed of said gasification furnace, said settling char combustion chamber being shaped and arranged to allow the fluidizing medium to be returned from said char combustion chamber to said gasification chamber by descending through said settling char combustion chamber and passing through said return opening into said gasification chamber,
• wherein said gasification chamber is operable to generate an internal revolving flow of the fluidizing medium.

A gasification furnace comprising:

• a gasification chamber for pyrolyzing and gasifying a fuel to produce combustible gas and char;
• a char combustion chamber for combusting the char supplied from said gasification chamber;
• a settling gasification chamber in said gasification chamber and having a supply opening located below an interface of a fluidized bed of said gasification furnace, said settling gasification chamber being shaped and arranged to allow a fluidizing medium and the char to be supplied from said gasification chamber to said char combustion chamber by descending through said settling gasification chamber and passing through said supply opening into said char combustion chamber;
• and
• a partition wall separating said char combustion chamber from said gasification chamber, said partition wall having a return opening located below the interface of the fluidized bed of said gasification furnace for allowing the fluidizing medium to be returned directly from said char combustion chamber to said gasification chamber,
• wherein said char combustion chamber is operable to generate an internal revolving flow of the fluidizing medium.