How does the vegetable dryer work?

The vegetable dryer is also called dehydrated vegetable rehydra. It is a kind of dried vegetable which is made by washing and drying fresh vegetables and removing most of the water in the vegetables. The vegetable dryer can keep the original color and nutrients of the vegetables basically unchanged. It is easy to store and transport, and can effectively regulate the season of vegetable production. After drying the vegetables, they can be reconstituted by immersing them in clean water and retaining the original color, nutrition and flavor of the vegetables. Therefore, the processing market for dried vegetables is now in great demand.

Vegetable dryer drying principle:

1. Selection of raw materials The vegetables with rich fleshy quality should be selected carefully before dehydration, and the pests, rots and cognac should be removed.

2, cutting, blanching will clean the raw materials according to product requirements, cut into pieces, silk, strips and other shapes. When pre-cooking, it varies from raw material to raw material. It is easy to boil and boil in boiling water. It is not easy to boil and boil water (water temperature is generally above 150 °C) for a while. Generally, the blanching time is 2 to 4 minutes. Leafy vegetables are not blanched.

3, cooling, draining pre-cooked vegetables should be immediately cooled (usually cold water shower), so that it quickly drops to normal temperature. After cooling, in order to shorten the drying time, you can use the centrifuge to drown water, or you can use the simple manual method to press the leaching. After the water is drained, you can spread it out and cool it to prepare the plate for baking.

4, drying should be based on different varieties to determine different temperatures, time, color and moisture content during drying. The main principle of the vegetable dryer multi-layer vegetable dryer is to evenly spread the material on the mesh belt, and drag it by the transmission device to move back and forth in the dryer. The hot air flows through the material, and the water vapor is discharged from the water. Discharged in the hole to achieve the purpose of drying. The mesh belt adopts 12-60 mesh steel mesh belt, and the length of the box body is composed of standard sections. In order to save the space, the dryer can be made into a multi-layer type. The common ones have two compartments, three floors, two rooms, five floors and a length of six. -40m, effective width 0.6-3.0m. , mesh belt, transmission device, air inlet pipe, air outlet pipe, fan (heat source is set separately) and so on. The line speed of the mesh belt depends on the type of material and the water content. The wind flow adopts negative pressure and porous air intake to ensure effective drying area, uniform distribution of wind flow and wind speed, and improve drying effect. In order to obtain a good drying effect and appropriate yield, the moisture content of the material, the linear velocity of the mesh belt, the air distribution volume and the air temperature must be properly, reasonably and organically combined.

5. Sorting and packaging of dehydrated vegetables After being tested to meet the requirements of the Food Sanitation Law, they can be packed in plastic bags, sealed, boxed, and then marketed.