Agricultural product sectional type microwave efficient drying device and application method thereof

Abstract

The invention discloses an agricultural product sectional type microwave efficient drying device and an application method of the agricultural product sectional type microwave efficient drying device, and belongs to the technical field of microwave drying. The agricultural product sectional type microwave efficient drying device comprises a material conveyor A, a microwave drying device, uniform heating devices and a display control device. A discharging outlet of the material conveyor is arranged on the top of a feeding end opening of the microwave drying device, and the multiple uniform heating devices are arranged in the microwave drying device. According to the agricultural product sectional type microwave efficient drying device, by means of the uniform heating devices, quantitative collection and uniform heating are conducted on materials processed by front-section microwave drying, then full material spreading is conducted again on next-section material drying, and therefore the microwave power of the section can be fully utilized, the space of material drying of the section can also be fully utilized, and the drying efficiency of equipment is effectively improved; and the materials pass through the uniform heating devices, and therefore the whole heating surfaces of the materials can make contact with each other to be uniformly heated, and the quality deterioration phenomena such as local charring or curing or cracking caused by uneven heat of the heating surfaces of the materials are effectively avoided. According to the device, a sectional-uniform heating-variable loading capacity drying method is adopted, and therefore the temperature uniformity of the materials and the drying efficiency of the equipment are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of microwave drying, and in particular relates to a segmented microwave high-efficiency drying device for agricultural products and a use method thereof. Background technique [0002] If the agricultural by-products such as Chinese herbal medicines, tea leaves, grains, fruits and vegetables cannot be dehydrated in time after harvest, they will rot and deteriorate, which will reduce the quality and affect storage and normal use. At present, microwave drying technology has been widely used in the dehydration processing of grains, fruits and vegetables, Chinese herbal medicines, tea, etc., but when using conventional tunnel-type microwave continuous drying equipment to dry materials, it is usually processed from the beginning to the end at one time, which brings the following problems: (1) With the loss of moisture, the weight and volume of the material decrease, which leads to the inability to fully utilize th...

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Problems solved by technology

[0002] If the agricultural and sideline products such as Chinese herbal medicines, tea leaves, grains, fruits and vegetables cannot be dehydrated in time after harvest, they will rot and deteriorate, which will reduce the quality and affect storage and normal use.

At present, microwave drying technology has been widely used in the dehydration processing of grains, fruits and vegetables, Chinese herbal medicines, tea, etc., but when using conventional tunnel-type microwave continuous drying equipment to dry materials, it is usually processed from the beginning to the end at one time, which brings the following problems: (1) With the loss of moisture, the weight and volume of the material decrease, which leads to the inability to fully utilize the microwave power and space of the equipment

In the middle and later stages of drying, as the quality of the material decreases, the power will drop even more (even less than 1 / 4 of the initial power); secondly, as the water evaporates, the volume of the material will gradually shrink, and the area of ​​the material on the conveyor belt will also increase. small, waste of space

The above two reasons lead to a decrease in production efficiency

(2) There is inhomogeneity in the distribution of the microwave field itself, coupled with the need to reduce the microwave power in the middle and later stages of drying, the microwave source cannot be fully turned on, which intensifies the inhomogeneity of the microwave field, and because the position of the material and the conveyor belt is relatively static, Makes uniformity (such as material temperature uniformity) more difficult to improve

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