Heracleum barbatum Ledeb instant powder obtained by vacuum freezing and drying

A technology of vacuum freeze-drying and instant powder, applied in the field of freeze-drying, can solve the problems of high production costs, achieve the effects of reducing production costs, stimulating economic development, and easy control of the process

Pending Publication Date: 2020-02-18
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Purpose of the present invention: aiming at the shortcomings of the high production cost of Laoshanqian instant powder, optimize the freeze-drying process of Laoshanqian instant powder to reduce production costs, improve product quality, and lay the foundation for its further popularization and processing

Method used

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  • Heracleum barbatum Ledeb instant powder obtained by vacuum freezing and drying
  • Heracleum barbatum Ledeb instant powder obtained by vacuum freezing and drying
  • Heracleum barbatum Ledeb instant powder obtained by vacuum freezing and drying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add the freshly squeezed and filtered old celery into the old celery preparation in proportion for later use. Clean the material tray of the freeze dryer and dry it in a ventilated place. Pour the old celery preparation liquid onto the material tray. Use a ruler to accurately measure the liquid height to 8mm, and the page is regular and stable, and there is no residual liquid on the tray wall. Pre-freezing: place the material tray containing the old celery liquid on the plate in the freeze-drying chamber of the vacuum freeze-drying machine, and cover the freeze-drying cover. Start the compressor of the vacuum freeze dryer to refrigerate, the temperature of the material is lowered to -25°C, and maintained for 6 hours. Vacuum drying: Turn on the cold trap refrigeration mode, and turn on the vacuum pump and vacuum gauge to evacuate the freeze-drying chamber. The refrigeration temperature of the cold trap device is controlled at -60°C, and the vacuum degree is maintained at...

Embodiment 2

[0046] Add the freshly squeezed and filtered old celery into the old celery preparation in proportion for later use. Clean the material tray of the freeze dryer and dry it in a ventilated place. Pour the old celery preparation liquid onto the material tray. Use a ruler to accurately measure the liquid height to 8mm, and the page is regular and stable, and there is no residual liquid on the tray wall. Pre-freezing: place the material tray containing the old celery liquid on the plate in the freeze-drying chamber of the vacuum freeze-drying machine, and cover the freeze-drying cover. Start the compressor of the vacuum freeze dryer to refrigerate, the temperature of the material is lowered to -30°C, and maintained for 5 hours. Vacuum drying: Turn on the cold trap refrigeration mode, and turn on the vacuum pump and vacuum gauge to evacuate the freeze-drying chamber. The refrigeration temperature of the cold trap device is controlled at -60°C, and the vacuum degree is maintained at...

Embodiment 3

[0048] Add the freshly squeezed and filtered old celery into the old celery preparation in proportion for later use. Clean the material tray of the freeze dryer and dry it in a ventilated place. Pour the old celery preparation liquid onto the material tray. Use a ruler to accurately measure the liquid height to 8mm, and the page is regular and stable, and there is no residual liquid on the tray wall. Pre-freezing: place the material tray containing the old celery liquid on the plate in the freeze-drying chamber of the vacuum freeze-drying machine, and cover the freeze-drying cover. Start the compressor of the vacuum freeze dryer to refrigerate, the temperature of the material is dropped to -28°C, and maintained for 5.5 hours. Vacuum drying: Turn on the cold trap refrigeration mode, and turn on the vacuum pump and vacuum gauge to evacuate the freeze-drying chamber. The refrigeration temperature of the cold trap device is controlled at -60°C, and the vacuum degree is maintained ...

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Abstract

The invention discloses heracleum barbatum Ledeb instant powder obtained by vacuum freezing and drying, and relates to the technical field of freezing drying of heracleum barbatum Ledeb. A key processspecially comprises the following steps of performing pre-freezing: pouring heracleum barbatum Ledeb juice into a tray, wherein the thickness of materials is 8mm, placing the tray in a freezing chamber of minus 25 DEG C, and performing pre-freezing for 6h; and performing vacuum drying: opening a coldtrap refrigeration mode, wherein the refrigeration temperature of a coldtrap device is controlledto be minus 60 DEG C or below, maintaining the vacuum degree to be 30Pa or below, and performing drying treatment. According to the freezing-drying technology of the heracleum barbatum Ledeb instant powder obtained by vacuum freezing and drying, the nutrient value of the heracleum barbatum Ledeb can be maintained to the maximum extent, and the green holding effect is good. The water content of theheracleum barbatum Ledeb instant powder which is frozen-dried is 5% or below, the freezing-drying efficiency is improved, and the shelf life of products can be prolonged to 12 months or above.

Description

technical field [0001] The invention relates to the technical field of freeze-drying, in particular to a freeze-drying process of vacuum freeze-drying Laoshanqian instant powder. Background technique [0002] Vacuum freeze-drying, also known as freeze-drying. It is a drying method that freezes the material below its eutectic point, freezes the moisture in the material into ice, and then sublimates the ice into vapor under relatively high vacuum conditions and then discharges it. It is essentially a series of heat and mass transfer processes of water state change and movement under low temperature and low pressure conditions. [0003] Vacuum freeze-dried products have high drying efficiency and complete dehydration; the drying process is carried out at low temperature and low pressure, and the heat-sensitive components and easily oxidized substances in the material are not easy to be destroyed; the color, fragrance, etc. of the material can be well preserved; the shrinkage r...

Claims

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Application Information

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IPC IPC(8): A23L2/39F26B5/06
CPCA23L2/39F26B5/06
Inventor 张秀玲高诗涵吴国美张文涛杜妹玲肖曼玉刘明华
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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