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Atmospheric low temperature spray drying device and drying method

A drying device and drying method technology, applied in the direction of drying solid materials, drying, drying machine, etc., can solve problems such as complex process, achieve the effect of high efficiency, easy cleaning, and improve the ability to carry moisture

Inactive Publication Date: 2011-12-21
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the current drying device generally needs to be in a vacuum or high pressure state to reach a low temperature, evaporate the water in the material, and obtain a dry powder. The whole process is relatively complicated.

Method used

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  • Atmospheric low temperature spray drying device and drying method
  • Atmospheric low temperature spray drying device and drying method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The following data were obtained through experiments:

[0029] Atmospheric pressure and low temperature spray drying of sweet potato red pigment extracted from water,

[0030] Air inlet temperature: 60-80 ℃; air outlet temperature: 30-40 ℃; initial material temperature: 11-16 ℃;

[0031] The moisture content of the dried powder is 6-8%.

[0032] At a concentration of 1%, the measured color value of the stock solution is 5, and the color value after drying is 4.78.

example

[0033] Case study 2

[0034] Atmospheric pressure and low temperature spray drying of Ginkgo biloba flavonoids extracted from Ginkgo biloba leaves,

[0035] Air inlet temperature: 40-70 ℃; outlet air temperature: 30-40 ℃; initial material temperature: 11-16 ℃;

[0036] The moisture content of the dry powder is 5-8%.

[0037] The flavonoid content before drying was 25.7%, and the flavonoid content after drying was 24.1%.

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Abstract

The invention discloses a normal-pressure low-temperature spray drying device and a drying method, which are composed of an air filter, a gas cooling and dehumidification device, a blower, a gas heater, a drying tower, and a cyclone separator in series, wherein the top of the drying tower An atomizing device and an air inlet are provided, and a material outlet is provided at the bottom, and the atomizing device is connected with a feed pump. The active substance extract to be dried is pumped into the drying tower, and after being atomized by the atomizing device, it exchanges mass and heat with the incoming dry air that has been added to the working temperature in the drying tower to evaporate the water into a dry powder, and then The gas enters the cyclone separator and is collected for packaging. The invention realizes low-temperature spray drying under normal pressure, and the dew point can reach -10-5°C after gas cooling and dehumidification, and the low-temperature continuous process satisfies the drying conditions of biological active substances.

Description

technical field [0001] The invention relates to a spray drying device and a drying method, in particular to a normal-pressure low-temperature spray drying device and a drying method capable of preserving biologically active substances. Background technique [0002] Spray drying has been widely used in all walks of life in industrial production, but the spray drying technology for some special substances is still lacking, such as spray drying of low glass transition temperature and heat-sensitive substances, due to the high temperature of the air It will destroy the biological activity of heat-sensitive substances or kill microorganisms, so it is necessary to maintain a low air inlet temperature to increase its value; the material with a low glass transition temperature will make the material in a viscous state when the air inlet temperature is too high, and cannot forming. Although freeze-drying can meet the requirements of preserving heat-sensitive biological activities, i...

Claims

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Application Information

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IPC IPC(8): F26B17/10F26B25/00
Inventor 黄立新张彩虹谢普军
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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