High performance agitation tank bottom paddle

Abstract

The invention relates to a bottom paddle and especially to a high performance agitation tank bottom paddle. The agitation tank bottom paddle comprises a blade; a cycle of lower steel plate cylinder is arranged at the periphery of the blade and fixed on a tank bottom plate through a facing plate. The advantages of the invention are as follows: a good stirring effect is obtained, the lower steel plate cylinder forms a collector which centralizes liquid flows generated by a stirring paddle to a same direction, thereby enabling flow velocity to become faster and more intensive, a scouring force to be substantially increased and stirring strength to be strengthened; the diameter of the blade is 0.4 to 0.6 time of the diameter of a tank body, energy consumption of the blade is far less than that of a 0.7 time prolonged paddle, so the paddle provided in the invention has remarkable effects in energy saving and consumption reduction; an obvious effect on eliminating deposition and scab is achieved, the gap between the lower steel plate cylinder and the tank bottom plate is maintained at an appropriate small distance, and when liquid flows pass through the gap, flow velocity becomes faster but resistance loss is small, thereby exerting intensive scouring on tank bottom and corners and eliminating deposited materials.

Description

technical field [0001] The invention relates to a bottom paddle, in particular to a high-performance stirring tank bottom paddle, which is suitable for various stirring tank stirring devices in the alumina industry, and is especially aimed at the seed division tank stirring device with high uniformity requirements. It has high mixing uniformity, low energy consumption and low shear. Background technique [0002] At present, in the production process of alumina hydrometallurgy, such as figure 1 All kinds of stirring tanks shown in the table adopt central drive paddle stirring device. When working, the central shaft drives the stirring paddle to rotate, and the blade of the stirring paddle forms an included angle with the horizontal rotating surface. When the blade rotates horizontally, it produces two component forces on the liquid flow in the horizontal circumferential direction and the vertical axial direction, and at the same time, the rotary motion of the liquid flow ge...

AI Technical Summary

Problems solved by technology

Although the problem of sediment accumulation can be improved, the diameter of the bottom paddle is too large, and the energy consumption increases too much, which is very uneconomical

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