Raisins are grapes that are dried in the sun or in the shade. Raisins can improve the body's metabolic function, eliminate excess fat, make blood flow smoothly, lower blood pressure, return blood pressure to normal, and restore gastrointestinal function to normal.
Food drying equipmentRaisin dryer is important drying equipment for raisin production on the market today. Therefore, the grape dryer must have good heating and heat preservation, ventilation, and water dispersing equipment, and also have good sanitary conditions, which can greatly shorten the drying time and ensure the quality of output. However, the cost is higher and the operation technology is more complicated. At present, many raisins manufacturers are gradually developing in the direction of artificial drying.
Grape drying process
Raw materials: Choose ripe, fresh grapes with good color as raw materials.
Cleaning: Pour the grapes into a flowing water tank to clean them, and further remove unqualified grapes.
Soak alkali: soak in 1.5% for a few seconds, then rinse with clean water.
Drying: Put the grapes in a drying room for drying at a temperature of 30°C, a large-scale grape dryer, and a humidity of 35°C for 12 hours; retract the storage container for 1-2 days, and then clean water to remove surface impurities.
Secondary drying: Adjust the temperature to 80°C during drying, bake for 4 hours, and then take it out and cool it back for 15 days. After that, it can be graded and packaged.
The raisins obtained after dehydration by the fruit dryer can retain more nutrients and taste better.
Features of heat pump dryer machine
1. The selected working temperature can be adjusted arbitrarily from 10°C to 75°C, and the temperature control system in the box can automatically maintain a constant temperature. It is suitable for baking, industrial oven heat treatment, or other heating purposes, and it is also a standing instrument in the laboratory.
2. The working temperature can be from room temperature to temperature, and the working temperature can be selected arbitrarily within this range. After selection, the temperature can be kept constant by the automatic control system in the box.
3. The indoor circulating fan promotes mechanical convection of the indoor hot air and makes the indoor temperature more uniform.
4. The constant temperature drying oven of the heat pump dryer machine has a precise structure, sensitive and accurate temperature control, and simple operation. It is suitable for the drying, baking, and heat treatment of items in the laboratories of industrial and mining enterprises, food enterprises, agricultural products industry, and seafood industry.