Conical disc type superheated steam drying device and method suitable for granular materials

Abstract

The invention relates to a conical disc type superheated steam drying device suitable for granular materials, the granular materials are in a fluidized state by utilizing centrifugal force generated by rotation of a rotating conical disc, the heat and mass transfer efficiency is high, the conical disc type superheated steam drying device is suitable for drying materials of various particle sizes such as A-type materials to D-type materials, and particularly the problem that the D-type large particles are difficult to be subjected to fluidized drying is solved. And the drying medium only performs heat and mass transfer with the material and does not participate in the particle fluidization process, so that the pressure drop problem caused by a traditional fluidized bed is avoided, the use amount of the drying medium is effectively reduced, and energy conservation is facilitated. According to the invention, materials with various particle sizes can be uniformly distributed in the dryer and fully transfer heat and mass with a drying medium, so that the problem of non-uniform drying of the materials caused by the phenomena of channeling and the like easily occurring in a traditional fluidized bed is avoided.

Description

technical field [0001] The invention belongs to the technical field of drying and relates to the drying of granular materials, in particular to a cone-disk type superheated steam drying device and method suitable for granular materials. Background technique [0002] The superheated steam drying process has the advantages of high heat and mass transfer efficiency, and the quality of the material can be better protected during the drying process. The whole drying process has no waste gas emissions and no pollution to the environment. In recent years, it has been more and more favored by researchers. favor. Atmospheric pressure superheated steam has a high drying temperature, which usually has a serious impact on the quality of heat-sensitive materials such as agricultural products and food during the drying process. If the pressure of the drying process is reduced, it can effectively solve the problem of damage to the quality of the material caused by the high temperature of ...

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Problems solved by technology

[0007] The above two published patent documents do not solve the problem of uniform drying of particles with different particle sizes.

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