Superheat steam drying device

Abstract

The invention provides a superheat steam drying device which comprises a steam drying mechanism, a vacuum drying mechanism, a first discharging valve, a second discharging valve and a steam heating part. A superheat steam drying and vacuum drying combined structure is adopted by the superheat steam drying device, namely, a full-closed belt pressing drying system is adopted; the structure is simple; the steam heat energy for drying and evaporating materials is fully recycled; a waste heat recovery device is simple or the waste heat is directly sent to the other heating device; the energy consumption is greatly reduced; the whole set of device is full-automatically controlled; the device can continuously produce; the operating flexibility is high; and the handling capacity is high.

Description

technical field [0001] The invention relates to a drying device, in particular to a superheated steam drying device. Background technique [0002] Superheated steam drying refers to the drying method that uses superheated steam to directly contact the material to be dried to remove moisture. It is a brand-new drying method developed in recent years. Compared with the traditional hot air drying, this kind of drying uses water vapor as the drying medium, and the exhaust gas discharged from the dryer is all steam. The latent heat of the steam can be recovered and reused by the condensation method, so the thermal efficiency is higher. And because the heat capacity of water vapor is twice as large as that of air, the consumption of drying medium is significantly reduced, so the unit heat consumption is low. The unit heat consumption of superheated steam drying is only 1000-1500kj / kg water, which is 1 / 3 of the heat consumption of ordinary hot air drying. It is a new drying techno...

AI Technical Summary

Problems solved by technology

The semi-sealed structure of the existing superheated steam drying device will cause air to enter the steam drying system and steam leakage during the drying process, which will affect the drying effect of the material and reduce the working efficiency

Although the existing device also has a completely sealed structure of the steam drying system, the system of the feeding device and the material discharging device is complex, the input of the feeding device and the material discharging device is large, and the operation is complicated

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