How to return the tide how to return the tide

The moisture content of tobacco leaves after baking is very low, generally only about 5% to 8%, easily broken, reducing the yield and quality of tobacco leaves, a great loss. Therefore, the tobacco leaves must be subjected to a resurgence treatment to slightly soften the tobacco leaves, and then the operations such as tapping, spasm removal and stacking are performed, so as to ensure that the quality and yield of tobacco leaves are not lost.

Resurfacing standard

Because of different purposes, the standards for resurgence are also different. The tobacco that regains smoke rejuvenation must be piled up for a short period of time, requiring the moisture content of the tobacco leaf to reach 14% to 15%. If it is suitable to classify and sell tobacco leaves, the moisture content is required to be 16% to 18%. The moisture content of tobacco leaf is too low, and it is very easy to crush, which not only affects the yield but also affects the quality of tobacco leaves. If the water content is too high, the color becomes darker, the gloss becomes darker, and “flushing” occurs. It is easy to mold and the quality of tobacco leaves is reduced.

The tobacco leaf is held in the hand, and it feels dry, and when it is properly softened, it can be baked for rejuvenation. When the tobacco leaves continue to return moisture, the hand does not feel dry and sounds, and it is not easily broken, the base of the veins is not easily broken, and the leaves are also soft and not easily broken. At this time, the water content is about 16% to 18%. At this time, the sale is in compliance with the standards of the state purchase. If you do not sell for the time being, find a suitable place for stacking. In order to prevent mildew during storage, the moisture content of the rejuvenated tobacco leaves is suitable for 15%. This type of tobacco leaves has a dry feel, a slight rattle, and the base of the veins is easily broken and the leaves are easily broken. Therefore, stack them with care, and seal them with plastic film. The moisture content of tobacco leaves must not exceed 18%. The rejuvenated tobacco leaf has a moist feeling when it is touched. The main vein is flexible and not easy to break. The leaves are wet and not easy to pull off. After the leaves are erected, they are bent downwards, and the tobacco leaf sticks into a ball. There will be “oil out” phenomenon, and There are dark wrinkles on the leaves and they cannot be restored. This kind of tobacco leaf not only fails to meet the national acquisition standard, but also easily generates heat and mold during stacking.

Resurfacing method

Hot air circulation barn regain

The use of a hot air circulating barn for rejuvenation not only results in a uniform rejuvenation, but also reduces the fragmentation during the handling of the tobacco leaves, and the regain time is greatly shortened. After the ceasefire, when the temperature in the baking room drops below 40°C, 3 kg of water is evenly sprayed in the barn and all doors and windows and wind tunnels are closed. The fan is turned on for about 2.5 hours after the fans are turned on.

2. Borrowing the tide

By reviving the tide, it is also called natural resurgence. In the early evening to the early morning, a method of reabsorbing moisture from dried tobacco leaves by virtue of the relatively high relative humidity in the natural environment. After the tobacco leaves have been dried, when the temperature in the baking room drops to a temperature slightly higher than the temperature outside the room, from the evening to the sunrise before the morning, the baking door and the sunroof hole are all opened to allow the tobacco leaves to absorb the moisture in the outside air. When the tobacco leaves are slightly softened, they can be carefully released. This method of rejuvenation is not subject to site constraints and is both convenient and labor-saving, but it is not subject to human control because of local climate conditions. In case of high weather and humidity, the speed of rejuvenation is faster; if the weather is more dry and the rejuvenation time is too long, it will affect the baking of the stove leaves.

3. Tide room regain

The tidal flat is a special construction equipment for rejuvenation of tobacco leaves. The structure of the tidal flats is almost the same as that of ordinary houses, with doors and windows installed, and it requires closeness to keep them warm and moisturized. The specific method of resurgence of tidal flats is to remove soot from the roasting room, and then carefully place it on a shelf or spread it underground, so that the tobacco slowly regains moisture. When the tobacco regains its moisture, the doors and windows must be closed tightly. If the weather is particularly dry, the relative humidity in the room is not enough and can be sprinkled on the ground to increase the indoor humidity and promote the resurgence of tobacco leaves. This method of rejuvenation is not limited by the climatic conditions, can improve the utilization efficiency of the barn, the rejuvenation of tobacco leaves is relatively uniform, and the crushing rate is low.

Regardless of which method is used for rejuvenation, special personnel are required to check it at any time. Generally, rejuvenation does not break the veins of the leaves, and the main vein is also suitable for drying (the moisture content of the tobacco leaves is about 13%).


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