Two-way hot-blast circulation drying method and device

Abstract

The invention relates to the technical field of agricultural product hot-blast drying, and discloses a two-way hot-blast circulation drying method and device. The device comprises a heating chamber, a circulating fan, an air inlet door, humidity elimination blind windows, a drying chamber and an automatic control system. The heating chamber is connected with the drying chamber through the circulating fan. An upper hot-blast channel is arranged over the circulating fan. The two ends of the upper hot-blast channel are communicated with the heating chamber and the drying chamber respectively. A lower hot-blast channel is arranged under the circulating fan. The two ends of the lower hot-blast channel are communicated with the heating chamber and the drying chamber respectively. An air inlet is formed in the upper end of the circulating fan. The end faces, on the two sides of the circulating fan, of the drying chamber are each provided with one humidity elimination blind window. According to the two-way hot-blast circulation drying method and device, the temperature inside the drying chamber is more uniform, and the temperature increase speed is higher.

Description

technical field [0001] The invention relates to the technical field of hot air drying of agricultural products, belongs to drying and drying facilities for agricultural and sideline products, and specifically belongs to a drying method and equipment for two-way hot air circulation in the field of fruits and vegetables. Background technique [0002] At present, drying equipment for fruits and vegetables is generally divided into heating mechanism, dehumidification mechanism and automatic control mechanism; [0003] The traditional drying method is one-way with hot air circulation, that is, the air flow rises or falls. As the air flow rises or falls, the heat will be absorbed by the material and the temperature of the hot air will decrease, resulting in the temperature of the upper and lower layers in the drying chamber. If the difference is too large, it will be difficult to guarantee the overall quality of fruits and vegetables, and even directly suffer economic losses, maki...

AI Technical Summary

Problems solved by technology

[0003] The traditional drying method is one-way with hot air circulation, that is, the air flow rises or falls. As the air flow rises or falls, the heat will be absorbed by the material and the temperature of the hot air will decrease, resulting in the temperature of the upper and lower layers in the drying chamber. If the difference is too large, it is difficult to guarantee the overall quality of fruits and vegetables, and even directly suffer economic losses, and it is even more difficult to realize industrialized production.

Images