Method and device for drying by heating and dehydrating

Abstract

The invention discloses a device for drying by heating and dehydrating. The device comprises a material outlet, one or a small number of hot air inlets, a heat source, an air outlet, a material inlet and a drying tunnel, wherein the material outlet and the material inlet are formed at two ends of the drying tunnel; the air outlet is formed at one end of the drying tunnel; the hot air inlets are formed above the drying tunnel; and the heat source is connected with the hot air inlets and connected with a fan through an air inlet channel. According to the method and device for drying by heating and dehydrating, a material to be dried is dried by virtue of naturally formed temperature difference, so that a large number of hot air inlets are not required to be additionally arranged, and the required air amount is small, so, the energy consumption can be reduced greatly, and the original color and effective components of the material can be kept to the maximum extent; and the heat energy of the air outlet enters into the heat source through an air return channel, the fan and the air inlet channel, so that the heat energy can be recycled effectively, and the energy-saving effect is good.

Description

technical field [0001] The invention relates to a heating dehydration drying method and device, in particular to a heating dehydration drying method and device for medical raw materials and semi-finished products, food raw materials and agricultural by-products, etc., belonging to the technical field of heating and drying equipment. Background technique [0002] Drying is the process of removing moisture from various materials. Various materials can be solid, liquid or gas. Solids include bulk materials, fiber materials, granular materials, fine powder materials, etc., and moisture is generally in the materials. water, or other solvents. The heating drying method is to use thermal energy to heat the material to vaporize the moisture or other solvents in the material, so as to release the moisture or other solvents from the material and realize the function of drying the material. Usually, the air is used to dry the material, that is, the air is preheated and sent to the dr...

AI Technical Summary

Problems solved by technology

[0005] The first technical problem to be solved by the present invention is that the heating dehydration drying device in the prior art is provided with moisture outlets in each drying chamber. The water vapor is discharged immediately, and the water molecules inside the wolfberry and other materials are very different from the outside water. Due to the imbalance of the above-mentioned water difference, the water is easy to precipitate rapidly, which is easy to affect the appearance of the wolfberry and other materials. Obvious shrinkage wrinkles appear, thus affecting In addition, in the process of rapid precipitation of the above-mentioned water, it is easy to separate out with a part of sugar, forming a layer of sugar layer on the surface of wolfberry, so that the role of sugar layering between wolfberry and wolfberry If it sticks together, it affects the color and quality of the dried and dehydrated wolfberry, and then provides a heating dehydration drying device that can still guarantee the color and quality of the wolfberry after drying and dehydrating

Images