The invention relates to a reactor for being directed at carbon containing fuel carries out entrained flow gasifica tion, it has a reacting chamber and one cooling chamber that borders on this reacting chamber within the reaction wall of pressure -bearing. The invention aims at providing a corrosivity wearing and tearing that the structure solution of bottom plate in the middle of is used for, this solution improves effective operating duration of entrained flow gasifica tion ware, and its mode does, reduces in middle bottom plate region to also reduce consumeing of dismantlement of sediment eduction gear and installation under repair. This purpose is following the realization, a plurality of components of this centre bottom plate each other continuously the unoccupied place and discharge to personally experience sth. Part of the body with this sediment and be connected as going to the fields for discharge at this sediment and form a gas space's air seal, limited this cooling chamber of this centre bottom plate downside between the body and this reaction wall, and the cavity between these components of this centre bottom plate through the pressure balance passageway each other, sweep the device and be connected with the gas space of this cooling chamber with an inert gas.