Patent ID: 8518134

Claim:
Method for the entrained-flow gasification of solid fuels under pressure, whereby in an upward internally circulating entrained flow, using first oxygen-rich gasification agents a) the practically complete gasification of the carbonaceous components of the solid fuels and b) a thermal treatment of aftergasification crude gases and also c) the granulation of the ash at temperatures above the ash-softening temperature take place, whereby carbon-containing gasification residues, ash granulates and dust-laden crude gases are formed and dust-laden crude gases are drawn off at temperatures below the critical ash-sintering temperature from the entrained flow upward into a buffer zone and from there passed to further processing, whereby the first gasification agents are injected into the entrained flow in such a way that a hot central upward flow and a “cold” downward wall flow are formed, whereby in a moving bed located below the entrained flow by use of second low-oxygen gasification agents an almost complete to totally complete oxidation of the carbon-containing gasification residues and ash granulates that leave the entrained flow in downward direction takes place at temperatures below the ash-softening temperature, whereby aftergasification crude gases and oxidized bottom products are formed, whereby the second gasification agents are fed in such an amount and composition that on the one hand, the ash-softening temperature will not be exceeded in the moving bed and on the other hand, the moving bed will be regularly passed, and whereby the oxidized bottom products are drawn off from the moving bed downward in countercurrent to the second gasification agents and the aftergasification crude gases are passed upward from the moving bed into the entrained flow.