Precooling device of low-temperature crushing system special for nanoscale material preparing

Abstract

The invention discloses a precooling device of a low-temperature crushing system special for the nanoscale material preparing. The precooling device comprises a freezing bin, wherein a shell is arranged on the outer wall of the freezing bin, a cavity is formed between the freezing bin and the shell, a heat preservation layer is arranged on the outer wall of the shell, the outer wall of a liquid nitrogen tank communicates with a first discharging pipe, one end of the first discharging pipe communicates with a conveying pipe through a flow control valve, one end of the conveying pipe communicates with an annular liquid nitrogen pipe, the annular liquid nitrogen pipe communicates with a liquid nitrogen spray head, one end of an output shaft of a first driving motor is fixedly connected with arotating shaft through a coupler, a stirring paddle is arranged on the rotating shaft, and one side of the freezing bin communicates with a second discharging pipe. When the precooling device is used, a cooling temperature of materials can be effectively controlled by arranging the liquid nitrogen tank, the flow control valve, the annular liquid nitrogen pipe and the liquid nitrogen spray head, and the materials are stirred by arranging the stirring paddle, so that the materials can be precooled more uniformly, and the precooling device is very convenient to use.

Description

technical field [0001] The invention relates to the technical field of nanoscale material processing equipment, in particular to a precooling device for a low-temperature crushing system dedicated to preparing nanoscale materials. Background technique [0002] Nanomaterials are also called nanoparticles, which generally refer to ultrafine particles with a size between 1-100nm. Some people call them ultrafine particles. Its scale is larger than atomic clusters but smaller than ordinary particles. Calculated according to its size, assuming that the size of each atom is 1 angstrom, then the number of atoms it contains is between 1000 and 1 billion. It is smaller than a normal biological cell and comparable in size to a virus. The shapes of nanoparticles are spherical, plate-shaped, rod-shaped, horn-shaped, sponge-shaped, etc. The components of nanoparticles can be metals, oxides, or other various compounds. [0003] With the development of science and technology, many materi...

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Problems solved by technology

[0003] With the development of science and technology, many materials now need to be prepared at the nanoscale. Because low-temperature crushing is conducive to the preparation of nanoscale materials, the preparation of existing nanoscale materials generally requires pre-cooling, but the existing pre-cooling The device, because there is no component for crushing material agglomeration, directly leads to insufficient cooling of the material, and insufficient pre-cooling inside the material agglomeration pre-cooling, which reduces the preparation efficiency of nano-scale materials to a certain extent, and cannot be used for materials. It is very inconvenient to use to control the cooling temperature, so we need to propose a pre-cooling device for the low-temperature crushing system dedicated to the preparation of nano-scale materials

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