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A method for online moisture detection in continuous grain drying process

A detection method and grain drying technology, which is applied in the direction of static material dryers, solid material drying, local stirring dryers, etc., can solve the problems of low grain moisture detection accuracy, large monitoring errors, and difficult elimination of dynamic errors, etc., and achieve the goal of overcoming Effects of temperature and humidity sensitivity issues, improved accuracy and stability, and avoidance of major defects

Active Publication Date: 2015-10-21
CHANGCHUN JIDA SCI INSTR EQUIP
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Problems solved by technology

The disadvantages of online moisture detection by resistance method are: ① When the moisture content of the grain is uneven and contains many green and uncooked grains, the detection value error is relatively large; ② The structure is complex and there are many faults; Blockage at the roller and damage the roller; ④It can only adapt to grains with similar properties and particle sizes, such as rice and wheat, and the sensor needs to be greatly changed when the type of grain changes; ⑤It belongs to destructive testing; ⑥The detection accuracy of high moisture grain moisture is low
Its disadvantages are: ①Inconvenient installation and maintenance; ②The detection accuracy is greatly affected by the environment, grain temperature and humidity, grain density, and grain flow rate; ③When the grain content is high, the monitoring error is large
The weight detection method has the advantages of high precision and good stability, but also has the disadvantages of inconvenient installation and difficult elimination of dynamic errors

Method used

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  • A method for online moisture detection in continuous grain drying process
  • A method for online moisture detection in continuous grain drying process
  • A method for online moisture detection in continuous grain drying process

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Embodiment Construction

[0023] see image 3 and Figure 4 , a continuous grain drying automatic operation system includes a dryer main body 1, a hot air duct 8, a hot air blower 9, a cold air blower 6, a hot blast stove 10, a grain feeding hoist 18, a load cell group 7 for the total weight of the dryer, and a signal detection And conversion unit 12, control display unit 11, temperature and humidity probe group 20, material level sensor 21, grain feeding chute 22.

[0024] During the drying operation, the grain to be dried is conveyed into the drying main body 1, the total weight sensor group 7 of the dryer is placed at the bottom of the column of the base of the main body 1 of the dryer or on the column, and the total weight of the dryer group 7 is connected with the signal detection and The conversion units 12 are connected together, and the signal detection and conversion unit 12 is connected with the control display unit 11 . The dryer total weight sensor group 7 is used to detect the total weig...

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Abstract

A continuous grain drying process moisture online detection method. Step 1: delivering to-be-dried grains into a dryer and activating a drying operation; step 2: detecting in real-time a gross weight and a material level and utilizing a relation between moisture content and content weight to calculate moisture content; step 3: either manually or automatically controlling and regulating a grain discharge rate and / or the drying temperature on the basis of real-time changes in the moisture content of the grains, thus allowing the moisture content of the grains discharged by a grain discharging mechanism to be within a range of permitted moisture content thresholds. The method is easy to operate, strong in anti-interference capability, and great in environmental adaptability, is suitable for continuous drying operations for crops such as corn, rice, and wheat, and avoids a major shortcoming of the prior art on moisture content detection.

Description

technical field [0001] The invention relates to an online moisture detection method in a continuous grain drying process, in particular to an online moisture detection method based on total weight detection of a continuous grain dryer. Background technique [0002] The basic goal of grain drying is to remove the moisture in the grain with the lowest drying cost and energy consumption under the premise of keeping the drying process stable. Therefore, the online detection of moisture is very important. [0003] The traditional online detection of moisture in the grain drying process mostly uses methods such as capacitance method or resistance method for detection. Recently, there have been new research and trends in China that use weight for online moisture detection and control. [0004] The principle of online moisture detection by resistance method is to use the correlation between grain moisture and its resistance value to indirectly measure grain moisture. High moisture h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/00G01N9/36F26B25/22
CPCG01N5/025F26B25/22G01G19/00G01N9/36F26B9/063
Inventor 吴文福韩峰张亚秋刘哲张立辉吴玉柱吴新怡
Owner CHANGCHUN JIDA SCI INSTR EQUIP
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