Microwave-convective thermostatic drier and method for making ready-to-eat millet by means of thermostatic drier

A constant temperature drying and microwave technology, applied in drying chamber/container, grain drying, drying of solid materials, etc., can solve the problems of poor taste, long drying time and nutrient loss of rehydrated products, achieving bright color, long overcoming time, The effect of less loss of nutrients

Inactive Publication Date: 2017-09-01
EASTERN GANSU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steaming porridge and drying are the key processes to facilitate the production of millet. There are generally two cooking methods, one is to cook the millet for a while and then steam until the millet is steamed; There is a lot of nutrient loss, and the taste of rehydrated produc

Method used

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  • Microwave-convective thermostatic drier and method for making ready-to-eat millet by means of thermostatic drier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown, the microwave convection constant temperature dryer of the present invention is composed of blower 1, wind speed valve 2, electric heating box 3, thermocouple 4, drying chamber 5, drying box 6, data acquisition and control instrument 7, microwave transmitter 8, system switch 9. An infrared probe 10, an optical fiber probe 11, a splitter plate 12, an air outlet pipe 13, a material tray 14, a rotating shaft 15, a motor 16, an electronic scale 17, an observation window 18, and an air inlet pipe 19 are connected.

[0022] The blower 1 communicates with the electric heating box 3 through the wind speed control valve 2 installed on the pipeline, and the electric heating box 3 is connected with the drying chamber 5 installed in the drying box 6 through the air inlet pipe 19 through the thermocouple 4 installed on the pipeline In the drying chamber 5, a microwave transmitter 8, an infrared probe 10, an optical fiber probe 11 and a material tray 14 are...

Embodiment 2

[0024] 1. After washing the powder impurities and dust adhering to the surface of the millet, soak it with water at a mass ratio of 1.5:1 at room temperature for 3 hours, so that the millet can fully absorb water and swell.

[0025] 2. Put the soaked millet into a pressure cooker and steam for 45 minutes at a temperature of 121°C and a pressure of 0.12MPa to gradually complete the gelatinization process of the starch. After steaming, cool it with cold air at 4°C for 30 minutes, and then dry it discretely .

[0026] 3. Put the discretely dried millet into the material tray 14 of the microwave convection constant temperature dryer in Example 1, weigh the millet loading capacity to 200 g and the charging thickness to 5 mm through an electronic scale 17, turn on the system switch 9 and the rotating shaft 15 Drive the millet in the material tray 14 to rotate, the blower 1 starts to blow air into the electric heating box 3, the air intake speed is controlled through the wind speed c...

Embodiment 3

[0028] 1. After washing the powder impurities and dust adhering to the surface of the millet, soak it with water at a mass ratio of 1.5:1 at room temperature for 3 hours, so that the millet can fully absorb water and swell.

[0029] 2. Put the soaked millet into a pressure cooker and steam for 45 minutes at a temperature of 121°C and a pressure of 0.12MPa to gradually complete the gelatinization process of the starch. After steaming, cool it with cold air at 4°C for 30 minutes, and then dry it discretely .

[0030] 3. Adopt the microwave convection constant temperature dryer of embodiment 1 to dehydrate the millet after discrete drying, set the temperature of the hot air entering the drying chamber 5 and the temperature of the millet to 80°C, set the microwave power of the microwave transmitter 8 to 125W, and the power density 0.6W / g, the thickness of the material is 5mm, and the dehydration time is 30 minutes to obtain instant millet with a moisture content of less than 10%. ...

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Abstract

The invention discloses a microwave-convective thermostatic drier and a method for making ready-to-eat millet by means of the thermostatic drier. The drier is formed by connecting an air blower, an air-speed valve, an electric heating box, a thermocouple, a drying chamber, a drying case, a data acquisition and control instrument, a microware emitter, a system switch, an infrared probe, an optical-fiber probe, splitter plates, an air outlet tube, a material disc, a rotating shaft, a motor, an electronic scale, an observing window and an air inlet tube. According to the method for making the ready-to-eat millet by means of the thermostatic drier, millet is soaked, steamed with high pressure steam and then dewatered through the microwave-convective thermostatic drier, and high-quality primary-taste ready-to-eat millet is obtained. When the ready-to-eat millet is eaten, the millet is re-watered in boiling water, and then millet porridge is obtained; millet powder can be obtained by crushing the millet, and millet milk tea with a rich and full taste can be obtained after the millet powder is brewed; and microwave constant-temperature rapid dewatering and recovering of millet products are achieved, nutritional ingredients of the millet products and the inherent flavor of the millet are maintained, and important significance in improvement of quality and efficiency of drying processing and consumption of the millet products is achieved.

Description

technical field [0001] The invention belongs to the technical field of cereal food processing, and in particular relates to a microwave convection constant temperature drier and a method for preparing instant millet based on the drier. Background technique [0002] my country is the main production area of ​​millet, with an annual output of 300,000 tons, accounting for 80% of the world's output; millet is favored by consumers because of its rich nutritional value, and has become one of the main grain varieties for adjusting polished rice and noodles. At present, my country's commercial millet staple food products are mainly extruded millet nutritional powder, which has many problems such as low degree of deep processing, single type of processed products, and does not conform to the public's consumption habits of millet food. Therefore, the development is in line with Chinese traditional Food habits of high-quality millet and other miscellaneous grain convenience foods have b...

Claims

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Application Information

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IPC IPC(8): F26B9/06F26B21/00F26B23/08F26B25/12F26B25/22
CPCF26B3/347F26B9/06F26B21/001F26B25/12F26B25/22F26B2200/06
Inventor 王应强温建华杨丰杨文仙王百姓赵红霞赵园
Owner EASTERN GANSU UNIVERSITY
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