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Tobacco low-temperature drying treatment technology

A technology for drying and processing tobacco leaves, which is applied in the fields of tobacco, tobacco preparation, application, etc., which can solve the problems of affecting the alcoholization effect of tobacco leaves, loss of activity, and large loss, and achieve microbial and enzyme activity retention, quality improvement, and less material loss. Effect

Active Publication Date: 2014-12-10
HUBEI CHINA TOBACCO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current drying methods are mainly drying and baking. These two drying methods are carried out at relatively high temperatures. After drying, the properties of the tobacco leaves have changed greatly, and the tobacco leaves have changed from green to yellow. During the processing process, the loss is relatively large, and some substances that have an important contribution to the aroma of tobacco leaves, such as reducing sugars and amino acids, will also be reduced during the drying process, and some microorganisms and enzymes will lose their activity during the processing process, which will affect the post-alcoholization effect of tobacco leaves

Method used

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  • Tobacco low-temperature drying treatment technology
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  • Tobacco low-temperature drying treatment technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Tobacco leaves of A are collected, sundries and moldy parts of diseases, insects and insects are removed, graded and processed, and packed into trays. The eutectic point was measured to be -15°C, and the pre-freezing temperature was set to -25°C.

[0026] Take 10kg of A tobacco leaf and pack it into a tray with a thickness of 20mm. Lower the temperature of the freezer to the pre-freezing temperature, put the tobacco leaf tray into the freezer, and keep it for 1.5 hours. The frozen tobacco leaves are placed in a vacuum drying chamber for sublimation drying. First, vacuumize to maintain the vacuum degree in the warehouse between 130 and 170pa, and supply heat to the warehouse through the heating plate. The maximum temperature of the heating plate is set at 40°C. When the temperature of the heating plate and the temperature of the tobacco leaves both reach 40°C, stop heating.

[0027] Break the vacuum in the vacuum drying chamber, take out the tobacco leaves, and put th...

Embodiment 2

[0029] Harvest B tobacco leaves, remove sundries and moldy parts of diseases, pests, and pack them into trays after grading.

[0030] Tobacco leaf B was taken, and its eutectic point was measured to be -13°C, and the pre-freezing temperature was set to -25°C.

[0031] Take 10kg of B tobacco leaves and put them on a tray with a thickness of 15mm. Lower the temperature of the freezer to the pre-freezing temperature, put the tobacco leaf tray into the freezer, and keep it for 1.5 hours. The frozen tobacco leaves are placed in a vacuum drying chamber for sublimation drying. First, vacuumize to maintain the vacuum degree in the bin between 140 and 180pa, and supply heat to the bin through the heating plate. The maximum temperature of the heating plate is set at 45°C. When both the temperature of the heating plate and the temperature of the tobacco leaves reach 45°C, stop heating;

[0032] Break the vacuum in the vacuum drying chamber, take out the tobacco leaves, and put them in...

Embodiment 3

[0034] Harvest C tobacco leaves, remove sundries and moldy parts of diseases, insects and insects, and pack them into trays after grading;

[0035] Tobacco leaf C was taken, and its eutectic point was measured to be -17°C, and the pre-freezing temperature was set to -30°C.

[0036] Take 10 kg of C tobacco leaves and pack them into a tray with a thickness of 30 mm. Lower the temperature of the freezer to the pre-freezing temperature, put the tobacco leaf tray into the freezer, and keep it for 2 hours. The frozen tobacco leaves are placed in a vacuum drying chamber for sublimation drying. First, evacuate to maintain the vacuum degree in the warehouse between 90 and 130pa, and supply heat to the warehouse through the heating plate. The maximum temperature of the heating plate is set at 50°C. When the temperature of the heating plate and the temperature of the tobacco leaves both reach 50°C, stop heating;

[0037] Break the vacuum in the vacuum drying chamber, take out the toba...

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Abstract

The invention discloses a tobacco low-temperature drying treatment technology, and belongs to the technical field of cigaret. The tobacco low-temperature drying treatment technology is performed according to the following steps: firstly, measuring the eutectic point of tobacco in advance, performing pretreatment and classification to the tobacco, removing impurities and stalks, and then loading the tobacco in a tray, secondly, performing prefreezing to the tobacco, i.e. keeping the tobacco to be in a prefreezing temperature for 1 to 2 hours, thirdly, performing vacuum freezing and drying to the tobacco, wherein the vacuum degree is kept between 90 to 200pa, and the temperature of a heating plate is 40 to 50 DEG C, performing vacuum breaking, and then taking out the tobacco, fourthly, performing cooling and moisture balance to the tobacco, laying the tobacco for 1 to 2 hours with the temperature being 17 to 35 DEG C and the relative humidity being 50 to 77 percent, ensuring that the tobacco moisture is 10 to 13 percent, and fifthly, performing quality inspection, and weighing and putting the tobacco into storage. The technology belongs to a completely new innovative technology, comprises simple steps, can produce unique green tobacco, and ensures that the quality of the tobacco is greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of cigarettes, and in particular relates to a new low-temperature drying process for tobacco leaves, which firstly freezes tobacco leaves and then removes excess moisture through sublimation of ice under vacuum. Background technique [0002] In the prior art, after harvesting, the tobacco leaves need to be dried to a certain moisture level before being preserved. The current drying methods are mainly drying and baking. These two drying methods are carried out at relatively high temperatures. After drying, the properties of the tobacco leaves have changed greatly, and the tobacco leaves have changed from green to yellow. During the processing process, the loss is relatively large, and some substances that make an important contribution to the aroma of tobacco leaves, such as reducing sugars and amino acids, will also be reduced during the drying process. Some microorganisms and enzymes will lose their activit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A24B3/04
Inventor 覃艳东杨俊鹏熊斌李超程华陈国平周红审程炳发
Owner HUBEI CHINA TOBACCO IND
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