CN107348555A - A kind of higher fire-cured tobacco type tobacco leaf preparation method of water content - Google Patents

Abstract

The invention discloses a method for preparing flue-cured tobacco leaves with high water content, which includes (1) yellowing stage: the technical essentials are to accelerate the yellowing speed and reduce the consumption of contained substances. (2) Color fixing stage: The technical essentials are dehumidification in advance and enhanced dehumidification. (3) Dry gluten stage: the technical essentials are to control the dry bulb and limit the wet bulb. The method can reduce the risk of roasting dregs of flue-cured tobacco leaves with higher water content, improve the quality of tobacco leaves of this type, improve the grade quality after modulation, and increase the income of tobacco farmers.

Description

A method for preparing flue-cured tobacco leaves with higher water content

technical field

The invention relates to a method for preparing flue-cured tobacco leaves with high water content.

Background technique

For example, the rainfall in the maturity stage of flue-cured tobacco is relatively large, and it is generally easy to produce tobacco leaves with high water content; long-term rainy and lack of light and the tobacco leaves in the second shed generally have high water content, and it is easy to produce tobacco leaves with high water content. However, if there is a lot of floating water on the surface of the tobacco leaf, its internal water content has not changed greatly, and it does not belong to the tobacco leaf with high water content. The flue-cured tobacco leaves with higher moisture content generally show that the internal dry matter is not sufficient enough, and they are easy to be roasted during curing, resulting in low or no use value of the cured tobacco leaves, which affects the comprehensive income of tobacco farmers.

Contents of the invention

In order to avoid the impact on the comprehensive income of tobacco farmers caused by the roasting of flue-cured tobacco leaves with high water content, and to improve the curing quality of this type of tobacco leaves, the invention provides a method for preparing flue-cured tobacco leaves with high water content. Using this technology can improve the quality of this type of tobacco leaves. Tobacco curing quality.

The preparation principle of this method: early dehumidification, fast dehumidification, first take water and then take color.

The main points of this method are: control the yellowing temperature slightly higher, accelerate the yellowing speed, and reduce the consumption of the contained substances; the dry-wet difference in the yellowing period should be appropriately enlarged, and the water should be removed; Heating up; in the stage of heating up and fixing the color, high-power dehumidification, slowly heating up, the degree of dryness of the tobacco leaves should be higher before 45°C.

The technical points of this method: harvest the tobacco leaves after the rain, and when loading the tobacco, burn a small fire to ensure that the temperature of the barn is between 32-34°C; at 38°C, it is found that the bottom (rising) leaf ears turn yellow and the difference between dryness and humidity is enlarged in advance to prevent the leaves from drying out. The base is roasted black; the temperature stabilization time should be flexible.

Method of the present invention comprises the steps:

(1) Yellowing stage: The technical essentials are to speed up the yellowing speed and reduce the consumption of contained substances. The heating rate is 1°C/hour, the dry bulb temperature is 37-38°C, and the difference between dryness and humidity is 2-3°C. The bottom shed tobacco leaves are required to be soft and basically turn yellow. After reaching the target, the temperature is raised at a rate of 1°C/3 hours, and the dry bulb temperature reaches 42°C. The main veins of the bottom shed tobacco leaves are required to be soft, the tips of the leaves are curled, and the top shed tobacco leaves are basically all yellow.

(2) Color fixing stage: The technical essentials are dehumidification in advance and enhanced dehumidification. Raise the dry bulb temperature to 48-50℃ at a speed of 1℃/2-3 hours, the veins of the tobacco leaves in the bottom shed will turn yellow, and more than half of the leaves will be dry. If this goal is not reached, the curing time should be extended appropriately, and the wet bulb temperature should be controlled at 37 ℃, it is necessary to ensure smooth dehumidification and uniform air intake, so that the tobacco leaves can be dehydrated and dried smoothly. After reaching the target in the 48-50°C temperature range, raise the temperature to 54-55°C at a rate of 1°C in 2 hours, and control the wet bulb temperature at 38°C to further dry the tobacco leaves until the leaves are completely dry, near the 1/3 of the leaf tip The main vein is dry, and the tobacco leaf change target is not reached. The dry bulb temperature does not exceed 55°C, and the wet bulb temperature does not exceed 40°C at this stage.

(3) Dry gluten stage: the technical essentials are to control the dry bulb and limit the wet bulb. Under the condition that the dry bulb temperature is not too high and the wet bulb temperature is not too low, it mainly depends on the length of time to make the tobacco leaves dry. Increase the temperature by 1°C per hour to 67-68°C to stabilize the temperature, control the wet bulb temperature between 40-41°C, and give enough time until all the tobacco leaves are dry. At this stage, the dry bulb temperature should not exceed 68°C. The wet bulb temperature should not exceed 43°C.

The beneficial effects of the present invention are:

1. Reduce the risk of roasting of flue-cured tobacco leaves with high moisture content.

2. Improve the curing quality of flue-cured tobacco leaves with higher moisture content.

3. Improve the grade quality of flue-cured tobacco leaves with high moisture content after modulation, and increase the income of tobacco farmers.

detailed description:

Example 1

(1) Yellowing stage: The technical essentials are to speed up the yellowing speed and reduce the consumption of contained substances. The heating rate is 1°C/hour, the dry bulb temperature is 37-38°C, and the difference between dryness and humidity is 2-3°C. The bottom shed tobacco leaves are required to be soft and basically turn yellow. After reaching the target, the temperature is raised at a rate of 1°C/3 hours, and the dry bulb temperature reaches 42°C. The main veins of the bottom shed tobacco leaves are required to be soft, the tips of the leaves are curled, and the top shed tobacco leaves are basically all yellow.

(2) Color fixing stage: The technical essentials are dehumidification in advance and enhanced dehumidification. Raise the dry bulb temperature to 48-50℃ at a speed of 1℃/2-3 hours, the veins of the tobacco leaves in the bottom shed will turn yellow, and more than half of the leaves will be dry. If this goal is not reached, the curing time should be extended appropriately, and the wet bulb temperature should be controlled at 37 ℃, it is necessary to ensure smooth dehumidification and uniform air intake, so that the tobacco leaves can be dehydrated and dried smoothly. After reaching the target in the 48-50°C temperature range, raise the temperature to 54-55°C at a rate of 1°C in 2 hours, and control the wet bulb temperature at 38°C to further dry the tobacco leaves until the leaves are completely dry, near the 1/3 of the leaf tip The main vein is dry, and the tobacco leaf change target is not reached. The dry bulb temperature does not exceed 55°C, and the wet bulb temperature does not exceed 40°C at this stage.

(3) Dry gluten stage: the technical essentials are to control the dry bulb and limit the wet bulb. Under the condition that the dry bulb temperature is not too high and the wet bulb temperature is not too low, it mainly depends on the length of time to make the tobacco leaves dry. Increase the temperature by 1°C per hour to 67-68°C to stabilize the temperature, control the wet bulb temperature between 40-41°C, and give enough time until all the tobacco leaves are dry. At this stage, the dry bulb temperature should not exceed 68°C. The wet bulb temperature should not exceed 43°C.

The method reduces the risk of roasting dregs of flue-cured tobacco leaves with high water content, improves the modulation quality of this type of tobacco leaves, improves the grade quality after modulation, and increases the income of tobacco farmers.

Claims (3)

1. A method for preparing flue-cured tobacco type tobacco leaves with higher water content, characterized in that: (1) Preparation principle: early dehumidification, fast dehumidification, first take water and then take color; (2) Key points of preparation: Grasp the slightly higher yellowing temperature, accelerate the yellowing speed, and reduce the consumption of the contained substances; the dry-wet difference in the yellowing period should be appropriately enlarged to remove water; when the fire is turned, the yellowing degree of the tobacco leaves should be slightly lower, and start in advance Slowly heat up; in the stage of heating up and fixing the color, use high fire to dehumidify, slowly heat up, and the degree of dryness of the tobacco leaves should be higher before 45°C; (3) Technical points: harvest the tobacco leaves after the rain, and when loading the tobacco, use a low fire to ensure that the temperature of the barn is 32 Between -34; 38 degrees to find the bottom layer (the leaf ears turn yellow and increase the dry-wet difference in advance to prevent the leaf base from roasting black; the temperature stabilization time should be flexible. 2. A method for preparing flue-cured tobacco type tobacco leaves with higher water content according to claim 1, characterized in that: comprising the steps of: (1) Yellowing stage: the technical essentials are to speed up the yellowing speed and reduce the consumption of contained substances; (2) Color fixing stage: the technical essentials are dehumidification in advance and enhanced dehumidification; (3) Dry gluten stage: the technical essentials are to control the dry bulb and limit the wet bulb. 3. A method for preparing flue-cured tobacco leaves with higher water content according to claim 1 or 2, characterized in that: comprising the following steps: (1) Yellowing stage: The technical point is to speed up the yellowing speed and reduce the consumption of contained substances; the heating rate is 1°C/hour, the dry bulb temperature is 37-38°C, and the dry-wet difference is maintained at 2-3°C. It is required that the leaves of the tobacco leaves in the bottom shed become soft and basically turn yellow; after reaching the target, the temperature is raised at a rate of 1°C/3 hours, and the dry bulb temperature reaches 42°C. Basically all yellow; (2) Color-fixing stage: The technical essentials are dehumidification in advance and enhanced dehumidification; the dry bulb temperature is raised to 48-50℃ at a speed of 1℃/2-3 hours, the veins of the tobacco leaves in the bottom shed turn yellow, and more than half of the leaves are dry If this goal is not reached, the baking time should be extended appropriately, and the wet bulb temperature should be controlled at 37°C. It is necessary to ensure smooth dehumidification and uniform air intake, so that the tobacco leaves can be dehydrated and dried smoothly; Raise the temperature at a rate of 1°C to 54-55°C, control the wet bulb temperature at 38°C, and further dry the tobacco leaves until the leaves are completely dry, and the main vein near the leaf tip is dry. The goal of changing the tobacco leaves is not reached, and the dry bulb temperature is not high. Exceeding 55°C, the maximum wet bulb temperature at this stage shall not exceed 40°C; (3) Dry gluten stage: the technical essentials are to control the dry bulb and limit the wet bulb. Under the condition that the dry bulb temperature is not too high and the wet bulb temperature is not too low, the dry tendon of the tobacco leaves mainly depends on the length of time; the temperature is raised to 67-68 ℃ at a rate of 1 ℃ per hour to stabilize the temperature, and the wet bulb temperature is controlled at Between 40-41°C, give enough time until all the tobacco leaves are dry. At this stage, the dry bulb temperature should not exceed 68°C, and the wet bulb temperature should not exceed 43°C.