Process for dehydrating fruits and vegetables and Chinese herbal medicine plants with liquid carbon dioxide

Abstract

The invention discloses a process for dehydrating fruits and vegetables and Chinese herbal medicine plants with liquid carbon dioxide and relates to a fruit and vegetable and Chinese herbal medicine processing process. The process comprises the following flows: (1) putting the sliced fruits and vegetables, Chinese herbal medicines or semifinished products from which the free water is removed in advanced into a dehydration tank, closing the bin gate of the dehydration tank and sealing and vacuumizing the dehydration tank; (2) opening a liquid carbon dioxide tank bleeder valve, gasifying the liquid carbon dioxide, then pressurizing the gaseous carbon dioxide by virtue of a compressor, entering into a gas-distributing tank, entering into the dehydration tank, maintaining the pressure for a period of time after the pressure in the dehydration tank reaches a certain pressure value, entering into a high-pressure recovery tank, entering into a low-pressure recovery tank, pumping and pressurizing the gases in the dehydration tank and the recovery tanks by virtue of a gas recovery compressor, flowing back to the gas-distributing tank, ensuring the recovery compressor to stop working when the pressure in the dehydration tank is approximate to the atmospheric pressure and closing the intake valve of the high-pressure recovery tank and opening the blowoff valve of the dehydration tank to discharge the residual carbon dioxide in the dehydration tank to the atmosphere; (3) taking out the materials in the tank; (4) carrying out inspection; and (5) packaging and warehousing.

Description

technical field [0001] The invention relates to a dehydration process for fruit and vegetable foods and Chinese herbal medicine plants. Not only suitable for leaf-like plants, but also suitable for dehydration of blocky, rod-like and root-like plants. Background technique [0002] The world's food industry is developing towards natural, health-care and convenient trends. Dehydrated fruits and vegetables are becoming more and more popular because they are natural, green, nutritious, easy to carry, and have a long shelf life; Finally, the packaging is convenient for transportation and can be stored for a long time. At present, plant dehydration generally adopts the dehydration process of oven high-temperature drying and vacuum low-temperature freeze-drying process. Oven high-temperature drying and dehydration process has the characteristics of small equipment investment, simple process, and easy operation. Low efficiency, poor sanitation and other defects. The vacuum low-t...

AI Technical Summary

Problems solved by technology

However, there are deficiencies such as complex and expensive equipment, high energy consumption, complicated operations, long processing time, high cost, expensive products, and inability to be widely promoted.