Process and apparatus for producing synthesis gas through thermochemical conversion of biomass and waste materials

An apparatus for converting feedstock to a synthesis gas, wherein the apparatus comprises:

• a gasifier, wherein the gasifier comprises a fluidized bed zone and a post-gasification zone arranged above the fluidized bed zone, wherein the fluidized bed zone includes a subzone B and wherein the post-gasification zone includes a subzone D, a subzone E arranged above subzone D, and a subzone F arranged above subzone E;
• a plurality of multi-layered injection nozzles within the gasifier, the plurality of nozzles being configured to introduce a gasification agent into the gasifier;
• and
• at least one particulate separator device;
• wherein at least one nozzle of the plurality of nozzles is arranged in subzone D of the post-gasification zone;
• wherein at least one nozzle of the plurality of nozzles is arranged in subzone B of the fluidized bed zone;
• wherein the apparatus includes a line for supplying pelletized feedstock to subzone B of the gasifier, the feedstock comprising biomass and/or carbon-containing solid waste material;
• wherein subzone F is in fluid communication with the at least one particulate separator device;
• and
• wherein subzone B includes at least one recirculation line in fluid communication with the at least one particulate separator device, thereby providing a recycling pathway from subzone F of the post-gasification zone, through the at least one particulate separator device, to subzone B of the fluidized bed zone.