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Ultrasonic-reinforced controlled atmosphere drying method and device

A drying method and a gas-enhancing technology, applied in the fields of ultrasonic-enhanced controlled atmosphere drying and ultrasonic-enhanced controlled atmosphere drying devices, can solve the problems of long drying time, low drying efficiency, loss of effective components, etc. High drying efficiency and the effect of improving tissue structure

Active Publication Date: 2015-02-04
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a direct contact ultrasonically enhanced controlled atmosphere drying method, which solves the problems of long drying time, low drying efficiency and serious loss of active ingredients of existing easily oxidized and densely structured materials.

Method used

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  • Ultrasonic-reinforced controlled atmosphere drying method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The ultrasonically enhanced controlled atmosphere drying method of the present embodiment comprises the following steps:

[0037] 1) After washing the carrots, peel them and cut them into thin slices with a thickness of 4mm to obtain carrot slices;

[0038] 2) 200g carrot slices are placed in the drying box of the controlled atmosphere drying device, placed on the ultrasonic radiating plate, and the infrared radiating plate is installed above the ultrasonic radiating plate at a distance of 10 cm from the material;

[0039] Turn on the controlled atmosphere drying device, feed nitrogen into the drying box to adjust the volume content of oxygen in the drying medium to 5%, then carry out controlled atmosphere hot air drying to the carrot slices, the drying temperature is 50 ° C, and the wind speed is 0.5m / s; While the hot air is drying, ultrasonic treatment and infrared radiation treatment (i.e. ultrasonic-infrared radiation enhanced modified atmosphere drying) are carried...

Embodiment 2

[0042] The ultrasonically enhanced controlled atmosphere drying method of the present embodiment comprises the following steps:

[0043] 1) Get the carrots, wash them, peel them, and cut them into thin slices with a thickness of 5 mm to obtain carrot slices;

[0044] 2) 200g carrot slices are placed in the drying box of the controlled atmosphere drying device, placed on the ultrasonic radiating plate, and the infrared radiating plate is installed above the ultrasonic radiating plate at a distance of 10 cm from the material;

[0045] Turn on the controlled atmosphere drying device, feed nitrogen into the drying box to adjust the volume content of oxygen in the drying medium to 6%, then carry out controlled atmosphere hot air drying to the carrot slices, the drying temperature is 55 ° C, and the wind speed is 1.0 m / s; While the heat-adjusting air is drying, ultrasonic treatment and infrared radiation treatment (i.e. ultrasonic-infrared radiation enhanced modified atmosphere dryi...

Embodiment 3

[0048] The ultrasonically enhanced controlled atmosphere drying method of the present embodiment comprises the following steps:

[0049] 1) Get the carrots, wash them, peel them, and cut them into thin slices with a thickness of 6 mm to obtain carrot slices;

[0050] 2) 200g carrot slices are placed in the drying box of the controlled atmosphere drying device, placed on the ultrasonic radiating plate, and the infrared radiating plate is installed above the ultrasonic radiating plate at a distance of 10 cm from the material;

[0051] Turn on the controlled atmosphere drying device, feed nitrogen into the drying box to adjust the volume content of oxygen in the drying medium to 5%, then carry out controlled atmosphere hot air drying to the carrot slices, the drying temperature is 60 ° C, and the wind speed is 1.5m / s; While the heat-adjusting air is drying, ultrasonic treatment and infrared radiation treatment (i.e. ultrasonic-infrared radiation enhanced modified atmosphere dryin...

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Abstract

The invention discloses an ultrasonic-reinforced controlled atmosphere drying method and device. According to the method, when controlled atmosphere hot air is used for drying a material, the material is subjected to a direct contact ultrasonic treatment. With the ultrasonic-reinforced controlled atmosphere drying method provided by the invention, an oxidation reaction process during a drying process is effectively inhibited, such that effective components in the material are protected, color browning is effectively inhibited, and a problem that nutrients are prone to oxidative degradation under conventional hot air drying is solved. The direct contact ultrasonic treatment has a synergistic effect with controlled atmosphere drying under a low-oxygen environment. With the method, product quality is ensured, and ultrasonic energy is directly transferred into the material, such that water content migration rate of controlled atmosphere drying is effectively improved, and energy utilization rate and mass transfer reinforcement efficiency are improved. Therefore, drying efficiency is increased and drying time is shortened, and problems of low drying rate and poor product quality of conventional hot air drying are solved. The method and the device have a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of drying and processing of agricultural products, and in particular relates to an ultrasonic-enhanced controlled-atmosphere drying method, and also relates to an ultrasonic-enhanced controlled-atmosphere drying device. Background technique [0002] Carrot is one of the most commonly used agricultural products in today's society. It is rich in nutrients, has high nutritional value and multiple health benefits. It is known as "earth ginseng" and is deeply loved by consumers. During the processing of carrots, due to cell shrinkage or tissue structure damage, the sensitivity of carrot nutrients to light, heat, and oxygen is likely to increase, resulting in the loss of carotene-based nutrients. [0003] Drying is an important means of carrot processing and preservation, and hot air drying is currently the most commonly used method for carrot drying. However, during the drying process, carrots are prone to brown...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/02
Inventor 刘云宏苗帅孙悦朱文学白喜婷
Owner HENAN UNIV OF SCI & TECH
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