Extraction tower of adjustable tray and application of extraction tower

The invention discloses an extraction tower of an adjustable tray. The extraction tower of the adjustable tray comprises a barrel 1, a feeding opening 2, a water inlet 3, a discharging opening 4, a positive conical tray 5 and a reverse conical tray 6, wherein the feeding opening 2 and the water inlet 3 are respectively located on the both sides of the top end of the barrel 1; the discharging opening 4 is located at the bottom end of the barrel 1; the end parts on the both sides of the reverse conical tray 6 are symmetrically welded on the barrel wall inside the barrel 1; the positive conical tray 5 is located above the reverse conical tray 6; a rotating shaft 7 is mounted from the center of the top end of the barrel 1 to the bottom of the barrel through an adjusting device; and the positive conical tray 5 is symmetrically and fixedly mounted on the rotating shaft 7. The invention further discloses an application of the extraction tower of the adjustable tray. The extraction tower of the adjustable tray provided by the invention can be used for conveniently adjusting a distance between the positive conical tray and the reverse conical tray by rotating the rotating shaft according to the quantity of a material without dismounting the device. The structure of the extraction tower of the adjustable tray fits a movement mechanical principle; the operation of the extraction tower of the adjustable tray is stable; and the requirements of an extraction process of a chemical product can be completely met.