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Grain microwave and fluidization combined drying equipment, drying method and application

A combined drying and fluidization technology, applied in the field of grain storage, can solve the problems of low hot air utilization rate and large floor area, and achieve the effect of low drying efficiency, high drying efficiency and high efficiency

Active Publication Date: 2016-09-07
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents all adopt the tunnel-type hot air and microwave combined drying technology. Although the drying uniformity of the material has been improved, the tunnel-type hot air and microwave combined drying equipment still has problems such as large floor space and low utilization rate of hot air.

Method used

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  • Grain microwave and fluidization combined drying equipment, drying method and application
  • Grain microwave and fluidization combined drying equipment, drying method and application
  • Grain microwave and fluidization combined drying equipment, drying method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Grain Microwave Fluidization Combined Drying Equipment and Effects:

[0054] The effective size of tower body 1 is 1500×1000×8600mm (length×width×height);

[0055] Dimensions of microwave section 3: 1500×1000×3600mm (length×width×height), among which, the size of leakage energy suppressor 8 and leakage energy suppressor 9: 1500×1000×1600mm (length×width×height), opening 60mm;

[0056] Drying section 4 size: 1500×1000×4000mm (length×width×height),

[0057] Cooling section 5 size: 1500×1000×1000mm (length×width×height);

[0058] Cooling fan: HDSR150 three-lobe Roots blower, matching motor power 11kW, air volume 22.0m in the air inlet state 3 / h;

[0059] Hot air fan: HDSR250 three-lobe Roots blower, matching motor power 22kW, air volume 90.4m in the air inlet state 3 / h;

[0060] Heat exchanger: BN series plate heat exchanger;

[0061] Fluidized plate: opening rate is 60%, inclination angle is 3°, the effective size of channel section is 60mm×1000mm, ten plates are ...

Embodiment 2

[0071] Embodiment 2: Microwave is to the effect of preheating, desinsection, bacteriostasis:

[0072] Adopt the equipment model and configuration of Example 1, adjust the microwave dosage, and dry the paddy. The initial temperature of the paddy is 23° C., and the total number of bacteria is 63000 cuf / g. Record the results of the microwave dosage on paddy preheating, insecticidal and antibacterial effects. As shown in Table 1. For the calculation methods of insecticidal rate, bacteriostatic rate and water content, please refer to "Xijun Zhang, Shanbai Xiong, Siming Zhao. Effect of Microwave Treatment on Rice Quality [J], Chinese Agricultural Sciences, 2009, 42(1): 224-229". It can be seen from Table 1 that microwaves have obvious effects on rice preheating, insecticide, and sterilization. When the rice microwave temperature reaches 61°C, the insecticidal rate can reach 100%, and the bacteriostatic rate can reach 85%. The amount of water is significantly reduced and rice qualit...

Embodiment 3

[0075] Embodiment 3: Effect comparison of fluidized treatment on heat transfer:

[0076] Adopt the equipment model and configuration of Example 1, adjust the air velocity of the empty pipe, dry the wheat, detect the influence of fluidization on the heat transfer of wheat, record the discharge temperature of the drying section and the discharge temperature of the cooling section, the results are shown in Table 2 shown. It can be seen from Table 2 that the higher the air velocity in the empty pipe, the higher the discharge temperature in the drying section, the lower the discharge temperature in the cooling section, and the faster the water content decreases, which shows that the fluidization treatment is beneficial to the heat transfer of wheat and accelerates The water loss rate of wheat and the high air velocity in the empty pipe can also speed up the cooling speed of the cooling section to ensure that the discharge temperature is within a reasonable range.

[0077] Table 2 ...

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Abstract

The invention discloses grain microwave and fluidization combined drying equipment, a drying method and application. The equipment comprises a tower body; and the tower body is provided with a buffer bin, a microwave section, a drying section and a cooling section in sequence from top to bottom. The drying section and the cooling section respectively include multiple fluidization plates staggered on upper and lower layers; one ends of the fluidization plates are fixedly connected with the tower body, and baffle plates are mounted at the other ends; and overflow channels are formed between the baffle plates and the tower body. An exhaust port of the cooling section communicates with a hot air intake ports of the drying section via a hot air fan and a heat exchanger; hot air exhausted by the cooling section is leaded into the drying section; and afterheat thereof is fully used to save the energy. The drying method comprises three steps of microwave preheating, fluidization drying and fluidization cooling. The drying equipment and the drying method use the microwave and fluidization combined drying, have the characteristics of high drying efficiency and uniform drying, can realize functions of insecticide and bacteriostasis, and can be used for drying such grains with good fluidity as paddy, wheat and corn.

Description

technical field [0001] The invention relates to microwave fluidized combined drying equipment, drying method and application of grain, which are applied in the fields of grain storage and the like. Background technique [0002] When rice, wheat, corn and other grains are harvested, the water content is about 20-30%. If the water content is too high, the respiration intensity of the grain is high, and the heat and moisture released are large, which can easily cause the grain to go moldy. Drying is an important part of post-harvest grain. After high-moisture grain is harvested, it is of great significance to maintain the quality of grain by drying it to safe moisture in time for storage. China's grain is lost about 10% every year due to mildew and insect damage. Especially in the high-temperature and high-humidity areas of southern China, grain insect damage and mildew are particularly serious. High moisture content in grain is the main cause of grain insect damage and mildew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B3/08F26B3/347F26B21/00F26B25/00
CPCF26B3/08F26B3/347F26B21/00F26B25/00
Inventor 黄汉英赵思明熊善柏王磐聂少伍
Owner HUAZHONG AGRI UNIV
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