Rapid drying and collecting device for micro nano powder

Abstract

The invention provides a rapid drying and collecting device for micro nano powder, and belongs to the field of powder drying. The device comprises a micro-droplet spraying device for forming nano powder slurry into a droplet state, a rapid drying device for drying nano powder droplets to form nano powder, a dehumidification device for removing water vapor generated in the drying process of the nano powder, and a powder collecting device for collecting the nano powder. According to the device, the microwave technology, the ultrasonic technology and the electrostatic technology are organically combined, nano powder is rapidly collected under the action of an electrostatic field after being suspended and dried in a drying chamber, the device has the advantages of being high in drying speed, not prone to agglomeration, controllable in drying time and suitable for drying the nano powder with different particle sizes, and meanwhile the device is compact in structure, suitable for small-batch preparation of nano powder in scientific research laboratories, and meets the requirement of taking and using at any time.

Description

technical field [0001] The invention belongs to the field of powder drying, and in particular relates to a device for quick drying and collecting micronized nanometer powder. Background technique [0002] Nano-scale powders have important uses in biopharmaceuticals, food processing, 3D printing, new energy batteries, national defense and military, etc. Powder drying is a key step in the preparation of nano-powder products. At present, the drying technologies of nano powder mainly include oven drying, microwave drying, freeze drying, spray drying, supercritical drying and so on. Microwave drying and spray drying are two commonly used nano powder drying techniques. The microwave drying speed is fast, but the nano-powder is easy to agglomerate during the drying process, resulting in a decrease in the quality of the nano-powder. Spray drying treats the materials to be dried in a fluidized form, disperses them to form mist-like particles, removes most of the water in an instant...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing nano-powder drying and collecting device has slow drying speed, uncontrollable drying time, cannot be applied to the collection of different powder particle sizes, the collection rate is low, the product is easy to agglomerate and the nano-powder cannot be collected in time as required, the device It occupies a large area and cannot meet the problem of small amount used in scientific research laboratories. The present invention provides a device for rapid drying and collection of micronized nano-powders, which skillfully utilizes microwave fields, standing wave fields and electrostatic fields, so that micro-droplets can Rapid drying and preliminary collection are realized in a small space. The hot and humid air in the device is processed by a dehumidification device, which avoids material loss caused by ventilation. Nano powders are collected separately through two-stage electric fields, and the collection rate of nano powders High, collecting powder from the collection tank will not affect the normal operation of the device

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