Process and apparatus for producing synthesis gas from carbon dioxide-containing educts by gasification

摘要

To generate synthesis gas from carbonaceous starting materials by gasification in a fluidized bed reactor (2), a first, low-lying fluidized bed region (7) of the fluidized bed reactor (2) is first heated to a first gasification temperature by external energy supply. This low-lying fluidized bed region (7) is received in a first, low-lying fluidized bed housing section (4) of a housing (3) of the fluidized bed reactor (2). The first gasification temperature is lower than a softening temperature of the educts or their ashes. This heating to the first gasification temperature takes place with a first heating device (12). A second reactor housing section (5), which is higher than the first fluidized bed area, is heated to a second gasification temperature by external energy supply. This heating to the second gasification temperature takes place with a second heating device (18). The educts are fed to the first fluidized bed region (7) via a feed device (20). A discharge device (22) serves to discharge the synthesis gas generated. The result is a method and a device for the production of synthesis gas from carbon-containing educts, whereby even when using softening-critical educts, undesired adhesion with a proper gasification efficiency is reduced or, if possible, completely avoided.