Hot air dryer

Abstract

The invention discloses a hot air dryer, comprising a material channel and a gas channel, the material channel includes a feeding belt conveyor arranged obliquely, a feeding hopper connected to the top of the feeding belt conveyor, a feeding hopper connected to the bottom of the feeding hopper The rotary cylinder, the low end of the rotary cylinder is connected with a trommel screen; the gas passage includes a combustion cylinder connected to the low end of the rotary cylinder, a return pipe connected to the high end of the rotary cylinder, a return pipe connected to the The cyclone separator, the induced draft fan connected to the air outlet of the cyclone separator, the air outlet of the induced draft fan is connected to the exhaust chimney; the exhaust chimney is also provided with a return branch pipe, and the return flow branch pipe is connected to in the combustor. The hot air dryer of the present invention has simple pipeline arrangement and convenient installation, and can recirculate and reuse air with waste heat, so that the utilization rate of fuel is high, the wasted heat is less, energy is saved, and drying efficiency is improved.

Description

technical field [0001] The invention relates to a hot air dryer, which belongs to the technical field of drying equipment in the metal recycling process. Background technique [0002] At present, the production process of primary aluminum consumes a lot of energy, and whether it is indirect or direct, the emission of greenhouse gases is relatively large. The primary aluminum industry accounts for the largest share of emissions from the non-ferrous metals industry. The energy consumption of primary aluminum in the industrial production process mainly comes from bauxite mining, alumina production, aluminum electrolysis and carbon anode production, among which the aluminum electrolysis process consumes the most energy. Compared with electrolysis in the production of primary aluminum, the utilization cost of recycled aluminum is only 10% of the latter, and in terms of energy consumption, recycled aluminum is only 5% of the former. From the point of view of the production cycle...

AI Technical Summary

Problems solved by technology

However, in the rotary drum in the prior art, the drying of aluminum chips is slow and the efficiency is low. At the same time, the temperature of the exhaust gas discharged from the rotary drum is relatively high, and direct discharge will cause heat loss.

Images