Microwave radiation drying method for high-moisture grain

A technology of microwave radiation and drying method, applied in the direction of drying and preserving seeds, can solve the problems of discontinuous operation process, complicated drying equipment, uneven drying, etc., achieve short drying time, facilitate continuous production, and improve labor productivity Effect

Inactive Publication Date: 2015-12-23
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a microwave radiation drying method for high-moisture grains, which is used t

Method used

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  • Microwave radiation drying method for high-moisture grain

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Effect test

Embodiment 1

[0031] Accurately weigh 30g of paddy with an initial water content of 30.79wt% (percentage by weight) in a 150ml glass reactor, the thickness of the grain is 3cm, accounting for 1 / 15 of the total volume of the dryer, and then the glass reactor is fixed in the microwave radiation reaction furnace Inside, the air with a flow rate of 150ml / min is introduced through the glass air guide tube. After the air flow is stable, turn on the power switch and set the relevant process parameters of microwave drying. The specific parameter conditions are as follows: microwave frequency 2.45GHz, microwave power 0.4W / g , radiation time 18min, radiation drying temperature 55 ℃. Turn on the switch of the microwave radiation reaction furnace to carry out microwave radiation drying. After the reaction, cool to room temperature, collect the rice after microwave drying, and use the constant weight method to measure the moisture content after drying in the oven. The results show that: after drying by m...

Embodiment 2

[0033]Accurately weigh 70g of rice with an initial water content of 30.79wt% (percentage by weight) in a 150ml glass reactor, the thickness of the grain is 5cm, accounting for 3 / 15 of the total volume of the dryer, and then the glass reactor is fixed in a microwave radiation reaction furnace Inside, the air with a flow rate of 100ml / min is introduced through the glass air guide tube. After the air flow is stable, turn on the power switch and set the relevant process parameters of microwave drying. The specific parameter conditions are as follows: microwave frequency 2.45GHz, microwave power 0.2w / g , radiation time 25min, radiation drying temperature 55 ℃. Turn on the switch of the microwave radiation reaction furnace to carry out microwave radiation drying. After the reaction, cool to room temperature, collect the rice after microwave drying, and use the constant weight method to measure the moisture content after drying in the oven. The results show that: after drying by micro...

Embodiment 3

[0035] Accurately weigh 30g of corn with an initial water content of 28.31wt% (percentage by weight) in a 150ml quartz reactor, the grain thickness is 8cm, accounting for 7 / 15 of the total volume of the dryer, and then the quartz reactor is fixed in a microwave radiation reaction furnace Inside, the helium gas with a flow rate of 200ml / min is introduced through the quartz gas guide tube. After the air flow is stable, turn on the power switch and set the relevant process parameters of microwave drying. The specific parameter conditions are as follows: microwave frequency 2.45GHz, microwave power 0.4W / g, the radiation time is 10 minutes, and the radiation drying temperature is 60°C. Turn on the switch of the microwave radiation reaction furnace for microwave radiation drying. After the reaction, cool to room temperature, collect the microwave-dried corn, and use the constant weight method to measure the moisture content after drying in the oven. The results show that: after micr...

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Abstract

The invention provides a microwave radiation drying method for high-moisture grain. The drying method at least comprises the following steps: placing the high-moisture grain in a drier and then placing the drier in a microwave radiation reacting furnace; and introducing carrier gas, turning on the switch of the microwave radiation reacting furnace after the carrier gas is stationary, carrying out microwave radiation drying on the high-moisture grain so as to allow moisture content of the grain to decrease to a set range, turning off the switch of the microwave radiation reacting furnace and cooling the dried grain to room temperature so as to obtain the dried grain. The drying method provided by the invention has the advantages of a fast drying speed, short drying time, sensitive reaction, easy controllability and a high heat energy utilization rate; and the dried grain has high quality.

Description

technical field [0001] The invention belongs to the field of grain storage and processing, and in particular relates to a microwave radiation drying method for high-moisture grain. Background technique [0002] As the world's largest grain producer and consumer, my country's total grain output in 2013 was 601.935 million tons. Affected by natural conditions, the moisture content of grains in different regions of my country is generally high when they are just harvested. For example, when wheat and corn are harvested, the moisture content is 15-25% and 25-35%. Moisture content is also as high as 15-25%, and the harvest moisture of these food crops has greatly exceeded its safe storage moisture (the safe storage moisture requirements of corn, wheat and paddy rice are respectively lower than 14.0, 12.5 and 15.5%). When the moisture content of food crops is too high, it is easy to cause heat and mildew, which will damage the food. According to statistics, in my country's newly ...

Claims

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Application Information

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IPC IPC(8): A23B9/08
Inventor 孙予罕尉慰奇孔令照罗虎唐志永魏伟李晋平孙志强王东飞
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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