Medium and energy internal recycle drying method and drying machine

Abstract

The invention relates to the field of drying equipment, in particular to a medium and energy internal recycle drying machine. The medium and energy internal recycle drying machine is characterized by comprising a drying machine body (1), a drying room (2) and a circle system; and the circle system comprises a draught fan (5), an evaporator (6), a compressor (7), an expansion valve (8), a condenser (9), a hot air internal flow passage (10), a hot air external flow passage (11), a water outlet pipe (12), a vertical hot air passage (13) and a cold air passage (14). According to the provided drying machine, in the drying process, a drying medium and heat energy of a process system recycle in the drying machine and are not discharged outside, the heat loss of exhausted gas does not exist, the material overheating phenomenon cannot occur, the drying process is gentle and stable, the drying quality is good, and the drying energy consumption is greatly saved; and meanwhile, the heat exchanging efficiency of a condensation room is greatly improved, the dehumidifying effect is intensified, and the ventilation power consumption is lowered.

Description

technical field [0001] The invention relates to the field of design drying equipment, and more specifically relates to a medium, energy internal circulation drying method and a dryer. Background technique [0002] Drying is a high-energy-consuming unit operation. Its basic methods mainly include static layer drying and fluidized layer drying, including downstream, countercurrent, cross-flow, and mixed-flow dryers. However, the current drying method is to heat the air and then send it into the The drying layer provides the material with the heat energy needed for water evaporation and absorbs the water, and then discharges it to the outside. The main disadvantage of this method is that the heat energy provided to the drying system is exhausted together with the air, the exhaust heat loss is very large, the exhaust gas pollutes the environment, and the power consumption of ventilation is also very large. At the same time, the drying temperature is not easy to control, and the ...

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the heat energy provided to the drying system is exhausted together with the air, the exhaust heat loss is very large, the exhaust gas pollutes the environment, and the power consumption of ventilation is also very large. At the same time, the drying temperature is not easy to control, and the material is affected Large thermal damage, poor drying uniformity

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