Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method

摘要

A reaction vessel including: a material input receiving cellulosic material and a material discharge for the cellulosic material, wherein the cellulosic material flows through the reaction vessel from the material input to the material discharge; a hydrolysate and liquid extraction screen; a hydrolysis zone between the material input and the hydrolysate and liquid extraction screen; a wash zone between the hydrolysate and liquid extraction screen and a wash liquid extraction screen; a wash liquid inlet port for introducing a wash liquid into the wash zone, wherein at least a portion of the wash liquid entering the wash liquid inlet port flows through the wash zone and is extracted by the hydrolysate and liquid extraction screen; a cooking zone between the wash zone and the material discharge and a cooking liquor extraction screen at or below the cooking zone and above the material discharge.