Hot air thin-layer material drying experiment device and method

Abstract

The invention discloses a hot air thin-layer material drying experiment device and method, and belongs to the field of agricultural machinery. The device is mainly characterized by comprising a temperature sensor, an air speed sensor, a control panel, a processor, a fresh air machine, an electric heating wire, a fresh air valve, an adsorption plate, an air return valve, a humidity sensor, a moisture removal valve, a return air machine, a left weighing sensor, a right weighing sensor and the like. The controller controls airflow temperature, speed, humidity and experiment start and stop in the air duct based on data fed back by various sensors. The airflow direction in the air duct is perpendicular to the gravity direction of the materials, so that the material weighing precision can be ensured. The drying equipment is small in size, high in energy utilization rate, controllable in drying process and capable of meeting material drying characteristic research and drying process fitting experiments.

Description

technical field [0001] The invention relates to a drying experiment device and method, in particular to a hot air thin-layer material drying experiment device and method, belonging to the field of agricultural machinery. Background technique [0002] In order to facilitate material storage and drying, it is necessary to reduce the moisture content of the material to below the safe storage moisture line through drying. Commonly used drying types include vacuum drying, refrigerated drying, and hot air drying, and hot air drying accounts for the highest proportion due to its simple structure and low cost. [0003] During the drying process of materials, changes in moisture content will also be accompanied by changes in drying quality and color. In order to grasp the drying characteristics of materials, formulate the optimal drying process, and study the influence of parameters such as air temperature, air speed, and drying time on the moisture content and drying quality of mat...

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Problems solved by technology

[0004] The existing hot air thin-layer material drying experimental equipment is difficult to measure the change of moisture in the material drying process, that is, the real-time measurement of the quality change in the material drying process

The main reason is that in order to ensure the uniform laying of thin-layer materials, they are usually laid flat, and the flat-laid materials are subjected to the action of hot air in the same direction as their mass, resulting in low accuracy of real-time quality measurement results during the drying process.

The existing method is to take out the material together with the tray for measurement from time to time during the drying process. The liquefaction phenomenon between the high-temperature material and the moisture in the air leads to large quality measurement errors, which in turn affects the research on the drying characteristics of the material and the optimal drying process. formulation

[0005] The drying strategies and methods of the existing hot air thin-layer material drying equipment are also difficult to ensure the consistency of material drying parameters, and the power consumption is high

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