Wet scrubber tower of a flue gas purification device, comprising a) a flue gas entrance and a flue gas exit, b) a liquid entrance and a liquid exit c) a contact area for said flue gas and said liquid between said flue gas entrance and said liquid entrance, d) at least one scrubber tray, positioned within said contact area across an inner horizontal cross section of the wet scrubber tower, wherein e) said scrubber tray comprises i) a multiplicity of spindles, arranged across an inner horizontal cross section of the wet scrubber tower, wherein adjacent spindles are arranged at a horizontal distance (d) to each other, wherein ii) at least some of the spindles are pivot-mounted to allow a rotative movement of the respective spindle around a corresponding spindle axis and to arrange the respective spindle at a predetermined rotation angle, iii) at least some of the spindles are equipped each with at least one plate-like designed protrusion, which extends outwardly from the respective spindle, iv) the spindles and the protrusions are shaped and arranged to provide flow-through openings between adjacent spindles and protrusions respectively, wherein each flow-through opening defines a corresponding flow-through area for the gas and liquid, the flow-through area corresponding to the uncovered part of the horizontal cross section of the scrubber tower, and the flow-through areas of all flow-through openings add up to at least 10% and do not exceed 80% of the inner horizontal cross section of the scrubber tower, independently of the respective rotation angles of the spindles, wherein at least two protrusions of one spindle are arranged behind each other in a direction parallel to the spindle axis and wherein the protrusions of adjacent spindles match each other, so that the corresponding protrusions of the adjacent spindles engage each other when brought into a position covering a maximum horizontal area. a) a flue gas entrance and a flue gas exit, b) a liquid entrance and a liquid exit c) a contact area for said flue gas and said liquid between said flue gas entrance and said liquid entrance, d) at least one scrubber tray, positioned within said contact area across an inner horizontal cross section of the wet scrubber tower, wherein e) said scrubber tray comprises i) a multiplicity of spindles, arranged across an inner horizontal cross section of the wet scrubber tower, wherein adjacent spindles are arranged at a horizontal distance (d) to each other, wherein ii) at least some of the spindles are pivot-mounted to allow a rotative movement of the respective spindle around a corresponding spindle axis and to arrange the respective spindle at a predetermined rotation angle, iii) at least some of the spindles are equipped each with at least one plate-like designed protrusion, which extends outwardly from the respective spindle, iv) the spindles and the protrusions are shaped and arranged to provide flow-through openings between adjacent spindles and protrusions respectively, wherein each flow-through opening defines a corresponding flow-through area for the gas and liquid, the flow-through area corresponding to the uncovered part of the horizontal cross section of the scrubber tower, and the flow-through areas of all flow-through openings add up to at least 10% and do not exceed 80% of the inner horizontal cross section of the scrubber tower, independently of the respective rotation angles of the spindles, wherein at least two protrusions of one spindle are arranged behind each other in a direction parallel to the spindle axis and wherein the protrusions of adjacent spindles match each other, so that the corresponding protrusions of the adjacent spindles engage each other when brought into a position covering a maximum horizontal area. i) a multiplicity of spindles, arranged across an inner horizontal cross section of the wet scrubber tower, wherein adjacent spindles are arranged at a horizontal distance (d) to each other, wherein ii) at least some of the spindles are pivot-mounted to allow a rotative movement of the respective spindle around a corresponding spindle axis and to arrange the respective spindle at a predetermined rotation angle, iii) at least some of the spindles are equipped each with at least one plate-like designed protrusion, which extends outwardly from the respective spindle, iv) the spindles and the protrusions are shaped and arranged to provide flow-through openings between adjacent spindles and protrusions respectively, wherein each flow-through opening defines a corresponding flow-through area for the gas and liquid, the flow-through area corresponding to the uncovered part of the horizontal cross section of the scrubber tower, and the flow-through areas of all flow-through openings add up to at least 10% and do not exceed 80% of the inner horizontal cross section of the scrubber tower, independently of the respective rotation angles of the spindles, wherein at least two protrusions of one spindle are arranged behind each other in a direction parallel to the spindle axis and wherein the protrusions of adjacent spindles match each other, so that the corresponding protrusions of the adjacent spindles engage each other when brought into a position covering a maximum horizontal area.