of the vessel to a wash zone which extends from the cooking zone to a bottom region of the vessel and a pulp discharge outlet in the bottom region a steam inlet at the upper region of the inlet an upper region of the digester vessel at an elevated cooking temperature and a screen assembly near the wash liquid inlet for the wash zone application_number US 201414171175 A description a new cooking method and system have been conceived and is disclosed herein for cooking thin chips in a continuous chemical digester and useable with various chemical cooking process such as kraft and soda process cooking thin chips with the method and system disclosed herein may solve or reduce the mass transfer problems associated with thin chips in conventional kraft continuous digester cooking thin chips may be comminuted lignocellulosic chips in which 85 to 90 of the chips have thicknesses of 2 mm to 6 mm the thin chips can be generated by adjusting conventional chippers in a mill supplying the chips and by adjusting conventional screening devices that screen the chips entering the chip bin for a continuous digester the cooking conditions in a continuous digester vessel for thin chips may be less severe than the conditions typically used to cook conventional thicker chips for example.