Spray drying device and method for preparing nano material

Abstract

The invention discloses a spray drying device and method for nano material preparation. The device comprises a reaction box and a discharge pipe arranged at the lower end of the reaction box, a discharge valve is arranged on the discharge pipe; a guide cone block convenient for collecting materials is arranged at the bottom in the reaction box where the discharge pipe is located; a heat insulationlayer is arranged on the surface of the reaction box; a mixing cylinder is arranged in the middle of the upper end of the reaction box in a penetrating manner; the air inlet end of the left lower side of the mixing cylinder is connected with an air inlet part; the feeding end of the right lower side of the mixing cylinder is connected with a feeding part. The defects of the existing device are improved, materials and hot air are preliminarily mixed by constructing a negative pressure cavity, then the mixture of the materials and the air is rapidly extruded by extruding a piston block, primaryatomization is achieved, then the sprayed materials are further scattered, and thus the dispersion degree of the materials is further improved and the drying effect on the materials is guaranteed.

Description

technical field [0001] The invention relates to the technical field of nanomaterial processing equipment, in particular to a spray drying device and method for preparing nanomaterials. Background technique [0002] Spray drying is a method of systematic technology applied to material drying. After the thinner is atomized in the drying room, the water vaporizes quickly in contact with the hot air, and the dry product is obtained. Through mechanical action, the material to be dried is dispersed into very fine mist-like particles, the area of ​​water evaporation is increased, the drying process is accelerated to remove most of the water, and the solid matter in the material is dried into powder. [0003] Existing patent announcement number is that the patent of CN208282583 U discloses a kind of equipment for spray drying device, and this device passes through spray drying device, oven dry cabinet, guide material cone, pipe hole, vaporization adsorption plate and atomizing nozz...

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Problems solved by technology

[0003] Existing patent announcement number is that the patent of CN208282583 U discloses a kind of equipment for spray drying device, and this device passes through spray drying device, oven dry casing, guide material cone, pipe hole, vaporization adsorption plate and atomizing nozzle. The connection and cooperation between them can realize the adsorption of water vaporization in the heating and drying process, which is beneficial to provide a relatively dry heating and drying environment and achieve the effect of long-lasting spray drying. However, the device cannot fully disperse the material when drying the material. , the method of dispersing is only realized by spraying and atomizing. This method of dispersing has a very limited dispersing effect, which leads to poor drying effect of the device, and also causes excessive heat in the exhaust gas, resulting in a waste of resources.

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