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Tobacco strip low-temperature redrying method and prepared redried tobacco strip

A cigarette, low temperature technology, which is applied in the preparation of tobacco, tobacco, application, etc., can solve problems such as loss of aroma substances, and achieve the effects of softening and reducing moisture, reducing processing strength, and maintaining biological enzyme activity.

Inactive Publication Date: 2019-06-04
CHINA TOBACCO GUANGDONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the loss of aroma substances caused by the excessive redrying temperature of the existing tobacco slices, and provide a low-temperature redrying method for the sliced ​​tobacco, which realizes the aroma of the sliced ​​tobacco in the redrying stage through freezing and vacuum drying. Retention of substances and maintenance of biological enzyme activity

Method used

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  • Tobacco strip low-temperature redrying method and prepared redried tobacco strip
  • Tobacco strip low-temperature redrying method and prepared redried tobacco strip
  • Tobacco strip low-temperature redrying method and prepared redried tobacco strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1

[0030] A low-temperature rebaking method for sheet tobacco, comprising the steps of:

[0031] S1. Freezing stage: Tobacco sheets with an initial moisture content of about 16% first enter the freezing stage, using dry ice to rapidly freeze the sheet tobacco in the section, the freezing temperature is -35°C, and the freezing time is 20 minutes;

[0032] S2. Vacuum drying stage: the frozen laminar tobacco enters the vacuum drying section, and the vacuum degree is 0.03Pa to sublimate the solid water in the laminar tobacco, and the moisture content of the laminar tobacco is controlled to drop to 13%, and the temperature is controlled at 5°C ;

[0033] S3. Temperature return and humidity control stage: the laminar tobacco enters the temperature return and humidity control section, and the temperature of the laminar tobacco is gradually raised and further dried by using the dry airflow that is basically the same as the ambient temperature. The temperature increase...

Embodiment 2

[0035] A low-temperature rebaking method for sheet tobacco, comprising the steps of:

[0036] S1. Freezing stage: the tobacco sheets with an initial moisture content of about 17% first enter the ultra-low temperature freezing section, and use liquid nitrogen to rapidly freeze the tobacco sheets in the section. The freezing temperature is -40°C and the freezing time is 25 minutes;

[0037] S2. Vacuum drying stage: the frozen laminar tobacco enters the vacuum drying section, and the vacuum degree is 0.02 Pa to sublimate the solid water in the laminar tobacco, control the moisture content of the laminar tobacco to 13%, and control the temperature at 0°C :

[0038] S3. Temperature return and humidity control stage: the laminar tobacco enters the temperature return and humidity control section, and the temperature of the laminar tobacco is gradually raised and further dried by using the dry airflow that is basically the same as the ambient temperature. The temperature increase rate...

Embodiment 3

[0040] A low-temperature rebaking method for sheet tobacco, comprising the steps of:

[0041] S1. Freezing stage: Lamina tobacco with an initial moisture content of about 18% first enters the ultra-low temperature freezing section, and uses dry ice to rapidly freeze the laminar tobacco in the section. The freezing temperature is -40°C and the freezing time is 30 minutes;

[0042] S2. Vacuum drying stage: the frozen laminar tobacco enters the vacuum drying section, using vacuum, the vacuum degree is 0.01Pa, so that the solid water in the laminar tobacco is sublimated, the moisture content of the laminar tobacco is controlled to drop to 14%, and the temperature is controlled at 10°C :

[0043] S3. Temperature return and humidity control stage: the laminar tobacco enters the temperature return and humidity control section, and the temperature of the laminar tobacco is gradually raised and further dried by using the dry airflow that is basically the same as the ambient temperature...

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Abstract

The invention discloses a tobacco strip low-temperature redrying method. The redrying method comprises the following steps of at a freezing stage, freezing moisture in the raw material tobacco strip to a solid state; at a vacuum drying stage, performing vacuum drying on the frozen tobacco strip; realizing the tobacco strip moisture removal; at a temperature return and humidity regulation stage, continuously performing normal temperature drying on the tobacco strip subjected to vacuum drying; and realizing the temperature return and humidity regulation of the tobacco strip. At the redrying stage, the vacuum ultra-low temperature drying is performed; compared with high-temperature drying in a conventional process, the mode has the advantages that the processing intensity is greatly reduced;the operation is simple and compact; the energy consumption is low; aroma substances of tobacco raw materials are well remained; the sensory quality indexes of aroma volume and aroma quality of the redried tobacco strip are obviously improved; on the other hand, the bio-enzyme activity at the inside or on the surface of the tobacco leaves can be well maintained through low-temperature redrying; good conditions are created for the natural alcoholization in the later warehouse storage process; and the smoke strength and the smoke concentration are obviously improved.

Description

technical field [0001] The present invention relates to the technical field of tobacco raw material processing, and more specifically, relates to a method for re-curing sheet tobacco at low temperature and the re-cured sheet tobacco prepared therefrom. Background technique [0002] The traditional purpose of re-curing sheet tobacco is mainly to adjust the moisture content of tobacco leaves, so as to facilitate the natural aging of tobacco leaves and improve the quality of tobacco leaves. With the continuous improvement of cigarette companies' requirements for the aroma characteristics of tobacco leaf raw materials, higher requirements are also put forward for the processing methods of the redrying process. How to better maintain the aroma characteristics of high-quality characteristic tobacco leaf raw materials has become one of the requirements of the redrying process. . Tobacco re-baking is to use the heat of re-baking to reduce the moisture content of the tobacco, so tha...

Claims

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Application Information

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IPC IPC(8): A24B3/10A24B3/04
Inventor 金保锋林锐峰彭琛罗思维张玺
Owner CHINA TOBACCO GUANGDONG IND
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