Countercurrent extraction apparatus

Abstract

A countercurrent extraction apparatus comprises an extraction tube; a propeller is disposed within the extraction tube; the propeller comprises a shaft and blades. The apparatus is characterized in that the blades are sheet-shaped, and the blades are arranged at interval on the surface of the shaft along the axial direction and in spiral arrangement. The sheet-shaped blades arranged spaced axially and spirally play the role of advancing the materials; the materials under the effect of such blades churn and spread out, so as to play a role in stirring; the materials churn from one side to the other side with the rotation of the propeller; although part of the materials rotate with the blades in place, the materials do not accumulate to one side at the same time because of spaced blades; continuous closely packed body can not be formed, and journal sticking effect can be avoided, so that blockage does not form in the extraction tube. Several tests prove that even if the total volume of the materials is greater than 80% of the total volume of the extraction tube, blockage does not appear, so that the efficiency of the extraction tube plays to the maximum, and the cost performance has been significantly improved.

Description

technical field [0001] This program involves a device that uses liquid medium to extract solid materials (hereinafter referred to as materials), especially the material and liquid medium flow in the opposite direction in the extraction tube, and a spiral arrangement of sheet-shaped blades is built in the extraction tube. The thruster propels the countercurrent extraction device for material delivery. Background technique [0002] In the prior art, the technical solution closest to this application is the continuous countercurrent extraction machine in use. This continuous countercurrent extraction machine is composed of an extraction tube, and the inside of the extraction tube is equipped with a screw propeller. The screw propeller is a continuous belt. Type blades are arranged in a spiral shape along the axial direction. Under the action of the screw propeller, the material is transported from one end of the extraction pipe to the other end, and the extraction solvent flows...

AI Technical Summary

Problems solved by technology

In this case, the propeller only plays the role of propulsion, and the material will not disperse if it is not tossed and stirred by external force, and the uniformity of extraction is poor, which greatly limits the improvement of extraction rate and is not conducive to the improvement of equipment performance. play, reducing the cost performance of the equipment

To meet the requirement of high extraction rate, it is necessary to increase the length of the extraction tube, which increases the floor space and investment of the equipment; the second is that when the extraction tube is circular, when the total volume of the material in the extraction tube exceeds the extraction tube When the effective total volume is 40%, the material will rotate with the rotation to cause the material to rotate in situ. Because it is a continuous belt blade, the material will be tightly piled up on the side of the extraction tube, forming a shaft-holding effect, which will cause blockage, which also greatly limits Improve the performance of the extraction tube and reduce the cost performance of the equipment

Images