Solar continuous drying system and method

Abstract

The invention discloses a solar drying system and a solar drying method. Aiming at the defect that the solar drying system and the solar drying method in the prior art cannot perform continuous drying, the invention provides a solar continuous drying system and a solar continuous drying method. The drying system introduces hot air into a drying chamber through an air path pipeline; a heat supply system comprises a solar air heat collector and a solar water heat collector; air heated by the solar air heat collector is directly blown into the drying chamber; hot air is obtained through heat exchange of water heated by the solar water heat collector and then is blown into the drying chamber; and an automatic control system of the continuous drying system judges and selects the hot air source blown into the drying chamber and opens and closes the pipeline. Solar heat collectors with two heat exchange working mediums are adopted, so the time difference of utilizing the solar energy is generated, the technical problem that continuous drying operation cannot be realized caused by that the solar drying system or the solar drying method are limited by the sunshine duration condition is solved, electric energy can be saved greatly when large articles are subjected to solar drying operation, and an excellent drying effect is achieved.

Description

technical field [0001] The invention relates to a drying system, in particular to a continuous drying system and drying method realized by utilizing solar energy, and belongs to the field of living and production machinery. Background technique [0002] Solar drying / drying is to use solar drying equipment to dry industrial and agricultural by-products. The process is to make the material to be dried, either directly absorb solar energy and convert it into heat energy, or obtain heat energy through the convective heat exchange of the air heated by the solar collector, and then pass through the heat transfer between the surface of the material to be dried and the inside of the material In the process of mass transfer, the moisture in the material is gradually vaporized and diffused into the air, and finally the purpose of drying is achieved. At present, it is mainly used or tested in the drying / drying of cereals, fruits, vegetables, wood, Chinese herbal medicines, tea, flower...

AI Technical Summary

Problems solved by technology

The biggest limitation of this kind of equipment and method is that it is affected by the length of sunshine time. As the sun goes down and the supply of hot air is stopped, it is impossible to continue drying realistically.

Therefore, it can only be applied to small-scale drying operations, or it needs to be equipped with a larger power auxiliary energy as a supplement, and it cannot maximize the original intention of using solar energy to save energy.

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