Flotation device

Abstract

The invention relates to a flotation device. The flotation device is characterized by comprising a trough, a forced feeding device, a forced sinking piece, a sinking material screw and a floating material screw, wherein the trough is a long trough, one end of the trough is a feeding end, the other end of the trough is a discharge end, and the middle of an end face of the feeding end is provided with a feeding hole; the forced feeding device comprises a feeding pipe, a feeding screw and a motor, wherein the feeding pipe is arranged slightly vertically, the upper part of the feeding pipe is provided with a feeding hole, the lower end of the feeding pipe is provided with a discharge hole, the discharge hole is fixedly connected with the feeding hole of the trough and communicated with the trough, and the feeding hole on the upper part is higher than the highest liquid level of the trough; the feeding screw is arranged in the feeding pipe; the motor is used for driving the feeding screw to rotate; the forced sinking piece is arranged in the trough and positioned nearby the feeding end, and is driven by an external force to form downward water flow at the feeding hole of the trough; the sinking material screw is arranged at the bottom of the trough and used for conveying heavy sinking materials heavier than water out of the trough; and the floating material screw is arranged at thedischarge end of the trough and used for conveying light floating materials lighter than water out of the trough.

Description

Technical field [0001] The invention relates to a flotation device, in particular to a flotation device of plastic crushed material. Background technique [0002] After being crushed and cleaned, plastic recycled materials usually go through a flotation operation. This uses a long water tank to put the cleaned plastic crushed material into one end of the tank, and heavy materials with a specific gravity of more than 1 will sink to the bottom of the tank. And use a sinking screw to output the water tank. The light floating material with a specific gravity of less than 1 floats on the water surface, and then a number of rotating parts (impellers) are used to drive the floating material to the other end of the tank, and finally a floating material screw is used to output the floating material. Since the water in the tank is in a state of agitation, the plastic flotation operation must have a longer time to allow heavy materials to sink to the bottom of the tank, especially the clos...

AI Technical Summary

Problems solved by technology

Since the water in the tank is in a state of agitation, it takes a long time for the plastic flotation operation to allow the heavy material to sink to the bottom of the tank, especially the heavier material with a specific gravity closer to 1, the slower the sinking speed , so the tank must have sufficient length to make the flotation reliable, which will increase the demand for the site (factory), which is not conducive to reducing production costs

Furthermore, the commonly used flotation equipment can only divide the reclaimed material by the specific gravity of water 1, which is not enough for some recycling operations, such as the recycling of some plastic films

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