Spray freeze dryer capable of controlling particle size of nano powder

A technology of spray freeze-drying and nano-powder, which is applied in the direction of nanotechnology, nanotechnology, liquid separation into beads and granulation, etc. It can solve the problems of uneven material quality and uncontrollable freezing rate, and achieve improved heat transfer uniformity, improved Uniformity, the effect of improving uniformity

Pending Publication Date: 2021-08-24
XIAN TECHNOLOGICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, in order to solve the problem of uneven material quality caused by uncontrollable freezing rate in the

Method used

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  • Spray freeze dryer capable of controlling particle size of nano powder
  • Spray freeze dryer capable of controlling particle size of nano powder
  • Spray freeze dryer capable of controlling particle size of nano powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The precursor solution of copper is carried out freeze-drying, when described equipment is used, comprises the following steps:

[0033] Step 1: Import all the obtained solution into the material tank, first set the equipment temperature parameters on the control end instrument, set the freezing temperature to -90°C, the drying temperature (the drying standard is: the room temperature of the equipment's environment), and the diameter is 0.5mm atomizing nozzle, and then start the system equipment;

[0034] Step 2: Turn on the controller 11, and the system first opens the nitrogen valve 7. At this time, the nitrogen gas will be atomized and enter the freeze-drying chamber 8. After the temperature in the freezing chamber drops to the set value, the system will automatically open the material valve 4; After the atomization enters the freezing chamber, it will condense under low temperature, and the system will adjust the material valve 4 and nitrogen valve 7 accordingly acc...

Embodiment 2

[0037] The precursor solution of copper is carried out freeze-drying, when described equipment is used, comprises the following steps:

[0038] Step 1: Import all the obtained solution into the material tank, first set the equipment temperature parameters on the control end instrument, set the freezing temperature to -120°C, the drying temperature (the drying standard is: the room temperature of the equipment's environment), and the diameter is 0.4mm atomizing nozzle, and then start the system equipment;

[0039] Step 2: Turn on the controller 11, and the system first opens the nitrogen valve 7. At this time, the nitrogen gas will be atomized and enter the freeze-drying chamber 8. After the temperature in the freezing chamber drops to the set value, the system will automatically open the material valve 4; After the atomization enters the freezing chamber, it will condense under low temperature, and the system will adjust the material valve 4 and nitrogen valve 7 accordingly ac...

Embodiment 3

[0042] The precursor solution of copper is carried out freeze-drying, when described equipment is used, comprises the following steps:

[0043] Step 1: Import all the obtained solution into the material tank, first set the equipment temperature parameters on the control end instrument, set the freezing temperature to -150°C, and the drying temperature (the drying standard is: the room temperature of the environment where the equipment is located), and the diameter is 0.3mm atomizing nozzle, and then start the system equipment;

[0044]Step 2: Turn on the controller 11, and the system first opens the nitrogen valve 7. At this time, the nitrogen gas will be atomized and enter the freeze-drying chamber 8. After the temperature of the freezing chamber drops to the set value, the system will automatically open the material valve 8; After the atomization enters the freezing chamber, it will condense under low temperature, and the system will adjust the material valve 4 and nitrogen ...

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Abstract

The invention relates to the technical field of freeze drying, in particular to a spray freeze dryer capable of controlling the particle size of nano powder, and aims to solve the problem that the quality of materials is uneven due to the fact that the freezing rate is uncontrollable in the spray freezing and drying process. According to the technical scheme, the spray freeze dryer comprises a material tank, a freeze drying chamber, a liquid nitrogen tank and a controller; the freeze drying chamber is of a double-layer cavity structure, an outer cavity is a closed cavity, the upper part of the outer cavity is connected with a nitrogen inlet for nitrogen to flow in, the center of the top of an inner cavity is provided with an atomizing nozzle for material spray falling, the top of the upper side of the inner cavity is closed, the circumference of the cavity is uniformly provided with a plurality of small holes, and the bottom of the freeze drying chamber is provided with a material collecting tray; the material tank is connected to an atomizing nozzle in the inner cavity of the freeze drying chamber through a material pump and a material valve by a pipeline; the liquid nitrogen tank is connected to a nitrogen inlet of the outer cavity of the freeze drying chamber through a liquid nitrogen pump and a nitrogen valve through pipelines, the material valve and the nitrogen valve are adjusted by a controller according to the feedback temperature of the temperature sensor, and a condenser is arranged below the freeze drying chamber.

Description

technical field [0001] The invention relates to the technical field of freeze-drying, in particular to a spray freeze-drying apparatus with controllable particle size of nano powder, which can be used for spray freeze-drying of various types of materials. Background technique [0002] Spray freeze-drying belongs to the field of drying technology. After the liquid material is atomized by a high-pressure atomizing nozzle, it contacts with a cold medium (low-temperature nitrogen, halide, etc.) and quickly cools down and freezes into fine ice particles, and then sublimates and dries in a vacuum environment to finally obtain dryness. powdery material. Spray freeze-drying technology has the advantages of high activity of dried materials, good powder dispersibility, high specific surface area, good porosity, and small powder particle size, so it has been widely used in the fields of medicine, food, chemical industry and nanomaterials. [0003] The freezing rate in spray freeze-dry...

Claims

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Application Information

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IPC IPC(8): B01J2/04B22F9/08B82Y30/00B82Y40/00
CPCB01J2/04B22F9/082B82Y30/00B82Y40/00B22F2009/0876B22F2009/088
Inventor 彭润玲翟浩楠杨杰王鹏肖明春郭俊德曹蔚
Owner XIAN TECHNOLOGICAL UNIV
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