A discharge screw arrangement for discharging lignocellulosic material from a lignocellulosic treatment reactor

A discharge screw (10) for discharging lignocellulosic material (7) from a lignocellulosic treatment reactor (1)， where the lignocellulosic material (7) enters into the discharge screw (10) at an outlet end of a reactor vessel (4) in the reactor (1) and is mechanically transported in a longitudinal direction along the discharge screw (10) towards a downstream end (13) of the discharge screw (10)， and where the lignocellulosic material (7) is transported from the downstream end (13) of the discharge screw (10) out through an outlet nozzle (20) located downstream of the downstream end (13) of the discharge screw (10) and into a blow pipe (5) located downstream of the outlet nozzle (20)， by means of steam (8) flowing along the discharge screw (10)， where the discharge screw (10) is at least partially conical with its outer diameter (d) decreasing towards the downstream end (13) of the discharge screw (10).