Rake blades, rake arm assemblies and disc dryers

Abstract

The invention provides a rake blade, a rake arm assembly and a disc type dryer. The rake blade is applied to the disc type dryer. The rake blade comprises a blade body and a lengthened blade arranged on the side of the blade body, and the lengthened blade and the lower end of the blade body form a notch in an enclosing mode. According to the technical scheme of the rake blade, by arranging the lengthened blade on the side of the blade body, when the rake blade is applied to the disc type dryer, a material stack formed by one rake blade can be located on a motion trail of the lengthened blade of another adjacent rake blade by reasonably arranging the installation positions of multiple rake blades, the lengthened blade of the rake blade moving at the back can basically push the triangular-similar material stack formed by the rake blade moving in the front into a trapezoid, materials can be more uniformly flatwise laid on heating discs to increase the utilization rate of the heating discs and improve the drying efficiency of the heating disc on the materials, and then the drying efficiency of the disc type dryer is improved on the premise that the disc layer number of the disc type dryer is not increased.

Description

technical field [0001] The invention relates to the field of powder and pellet heating or cooling equipment, in particular to a rake blade, a rake arm assembly and a disc dryer. Background technique [0002] The disc dryer is mainly used to heat or cool the material. It is mainly composed of a large heating plate, a small heating plate, a rake arm, a rake knife (evenly installed on the rake arm), a rake leaf (installed on the rake knife), heat conduction It is composed of medium inlet pipe, heat conduction medium outlet pipe, main shaft, driving device, etc. However, when the disc dryer heats powdery materials, there are mainly the following two technical problems: 1) After the rake knife runs, an annular ravine will be formed at the position where the rake leaves pass on the heating plate, so that the effective area heated by the heating plate Nearly 1 / 3 will be wasted; 2) After the rake knife runs, the material on the heating plate will be accumulated on both sides of the...

AI Technical Summary

Problems solved by technology

However, when the disc dryer heats powdery materials, there are mainly the following two technical problems: 1) After the rake knife runs, an annular ravine will be formed at the position where the rake leaves pass on the heating plate, so that the effective area heated by the heating plate Nearly 1 / 3 will be wasted; 2) After the rake knife runs, the material on the heating plate will be accumulated on both sides of the rake blade to form a circular material pile similar to a triangular cross-section, and due to the heat transfer of the powder material itself The capacity is poor, the height of the material pile with a triangular cross-section is relatively thick, and the heating surface area in direct contact with the heating plate is relatively small, so the material cannot be heated efficiently

And in the prior art, the measure that is taken for overcoming above-mentioned defect is to increase the quantity (number of layers) of heating tray, but the overall height of tray dryer also can increase thereupon like this, thus has increased tray dryer on the one hand On the other hand, this kind of disc dryer is not suitable for places with high space requirements, thus reducing the application occasions of the disc dryer

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