Alkali liquor discharging device suitable for mercerizing machine

The utility model provides an alkali liquor discharging device suitable for a mercerizing machine, which belongs to the technical field of mercerizing machines and comprises a box body, an extrusion component, an expanding component and a collecting component, the box body is used for being installed between an alkali washing cavity and a cleaning cavity of the mercerizing machine. The extrusion assembly is arranged in the box body; the extrusion assembly comprises two groups of extrusion rollers which are arranged up and down at intervals, and an extrusion gap for cloth to pass through is reserved between the two extrusion rollers; the expanding assembly is arranged in the box body and is arranged on the front side of the extrusion assembly in the cloth passing direction; the spreading assembly comprises a spreading roller of which the axis is parallel to the extrusion roller, and the spreading roller is used for spreading wrinkles on the to-be-extruded cloth; and the collecting assembly is arranged below th