Energy-saving and efficient fruit and vegetable dewatering and drying equipment and drying method

A technology for drying equipment and fruits and vegetables, which is applied in the preservation of fruits and vegetables, preservation of fruits/vegetables by dehydration, food preservation, etc., can solve the problem that it takes a long time to restore the pressure of the drying chamber, the amount of materials processed by air jets is small, and the mass production cannot be achieved. and other problems to achieve the effect of shortening drying time, avoiding glow discharge and improving drying uniformity

Pending Publication Date: 2022-04-22
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The energy consumption required by the airflow is high, and since freeze drying requires a vacuum environment, it takes a long time for the drying chamber to recover the pressure after the spraying operation; the amount of material processed by the airflow spraying is small, and the purpose of mass production cannot be achieved

Method used

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  • Energy-saving and efficient fruit and vegetable dewatering and drying equipment and drying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An energy-saving and high-efficiency fruit and vegetable dehydration and drying equipment. The material barrel 6 is placed in the microwave heating chamber 9. There are microholes 8 on the wall of the barrel for gas in and out, and a hatch 7 is provided on the side wall; the material barrel 6 is connected to an adjustable speed motor. 2. Optical fiber sensor; the microwave heating cavity 7 is placed in the box body 3, and there is a microwave generator 5 connected to the temperature control cold trap box 10; the temperature control cold trap box 10 is connected with a vacuum pump 1 and a freezing unit 13; The temperature and cold trap box 10, the microwave generator 5, the vacuum pump 1, and the motor 2 regulate the drying process through the control panel 4; the control panel is installed on the box body 3; there is a stirring baffle inside the material barrel.

[0024] The specific method of use of the drying equipment of the present invention is to open the hatch 7 of...

Embodiment 2

[0025] Example 2 Drying yam grains in the process of rotating synergistic multi-stage variable power microwave freeze-drying

[0026] Open the hatch 7 of material bucket 6, then load yam grain;

[0027] The rotation interval of the material barrel is 20 minutes, and the rotation time is 2 minutes

[0028] Pre-drying stage 0—0.5h: Open the temperature-controlled cold trap box, the microwave does not start, the heat conduction of the ambient temperature to the material promotes the biochemical part of the surface ice crystals, and the temperature of the material rises to -25°C.

[0029] Initial stage 0.5—2.0h: Keep the temperature-controlled cold trap box open, microwave power 600W, microwave loading power is low, moisture is gradually removed, and the temperature of the material rises slowly to -18°C;

[0030] The third stage 2.0-5.5h: Keep the temperature-controlled cold trap box open, the microwave power is 1200W, and the microwave loading power is the highest stage. At this...

Embodiment 3

[0033] Example 3 Drying Garlic in Cooperative Multi-Stage Variable Power Microwave Freeze-drying Process of Rotation

[0034] Open the hatch 7 of material bucket 6, then load garlic;

[0035] The rotation interval of the material barrel is 30 minutes, and the rotation time is 3 minutes

[0036] Pre-drying stage 0-0.5h: Open the temperature-controlled cold trap box, the microwave does not start, the heat conduction of the ambient temperature to the material promotes the biochemical part of the surface ice crystals, and the temperature of the material rises to -20°C.

[0037] Initial stage 0.5—1.5h: Keep the temperature-controlled cold trap box open, the microwave power is 650W, the microwave loading power is low, the moisture is gradually removed, and the temperature of the material rises slowly to -15°C

[0038] The third stage 1.5-4.5h: Keep the temperature-controlled cold trap box open, the microwave power is 1300W, and the microwave loading power is the highest stage. At t...

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Abstract

The invention belongs to the technical field of fruit and vegetable drying, and particularly relates to energy-saving and efficient fruit and vegetable dewatering and drying equipment and a drying method. The material barrel is connected with a temperature control cold trap box, and the temperature control cold trap box is connected with a vacuum pump and an adjustable-speed motor; a cabin door and an optical fiber sensor are arranged on the barrel wall of the material box; the microwave generator is placed above the material barrel; the optical fiber sensor, the temperature control cold trap box, the microwave generator, the vacuum pump and the motor are regulated and controlled through the control panel; stirring baffles are distributed in the material barrel; drying equipment is improved, microwaves are added together with rotation, uniform drying is achieved, meanwhile, the drying rate is increased, and energy is saved; meanwhile, the invention provides a process method for drying fruits and vegetables by using the equipment, microwave freezing and uniform heating are realized through an intermittent stirring mode, and the product quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of fruit and vegetable drying, and in particular relates to energy-saving and high-efficiency fruit and vegetable dehydration drying equipment and a drying method. Background technique [0002] Vacuum freeze-drying retains the color, flavor, nutrition and texture characteristics of the product to the greatest extent, and its product quality is considered to be the highest among all drying technologies. However, freeze-drying is a very time-consuming and energy-consuming process, and its low productivity and high cost limit its wide application in industry. In order to improve the above problems, microwave technology was introduced to assist freeze-drying. Microwave freeze-drying technology is based on freeze-drying, using a microwave generator instead of a traditional heating plate to provide sublimation latent heat to frozen materials, thereby dehydrating and drying. Microwaves act on objects mainly throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/024A23B7/02A23N12/10
CPCA23B7/024A23B7/02A23N12/10Y02P60/80Y02P60/85
Inventor 乔旭光张斌卢晓明郑振佳
Owner SHANDONG AGRICULTURAL UNIVERSITY
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