Gasification system and method

A gasification system comprising:

• a gasification chamber having an upper section and a lower section;
• at least one fuel-inlet for injecting carbonaceous fuel and oxidant into said upper section whereby, in a thermo-chemical reaction, synthesis gas and residual char is generated;
• a separator in fluid connection with the upper section via an outlet, said separator being configured to receive said synthesis gas and to separate residual tar from said synthesis gas;
• a char bed disposed in said lower section, said char bed being formed by residual char generated in said thermo-chemical reaction and allowed to travel downwards within said gasification chamber to the char bed;
• at least one gas-inlet at a bottom portion of said lower section for injecting gas into said char bed;
• at least one tar inlet arranged to inject said residual tar from said separator into said char bed whereby, in a cracking process, said residual tar is converted into synthesis gas, and
• a perforated grate located at said bottom portion, arranged to support a formation of the char bed and being movable in order to extract residual ashes;
• wherein the lower section of the gasification chamber is adapted for a temperature higher than a temperature of the upper section of the gasification chamber,
• wherein said at least one gas inlet is configured to control an injection velocity of the injected gas such that a fluidization of said char bed does not disrupt a balance between the downwardly directed travelling of residual char from said upper section and an upwardly directed flow of gas,
• wherein said carbonaceous fuel is a solid particulate carbonaceous fuel, and wherein said upper section of the gasification chamber has a curved inner surface, and wherein said at least one fuel-inlet is configured such that said solid particulate carbonaceous fuel and oxidant is injected into said upper section tangentially such that an entrained flow of said synthesis gas is formed, whereby residual char is separated and allowed to travel from said upper section down towards said lower section in order to form the char bed.