CN115886301A - A preparation method for promoting rapid and uniform yellowing of flue-cured tobacco leaves - Google Patents

Abstract

The invention belongs to the technical field of flue-cured tobacco preparation, and in particular relates to a preparation method for promoting rapid and uniform yellowing of flue-cured tobacco leaves. Including the following contents: hot air circulation dehumidification in flue-cured tobacco leaf preparation process, increase circulation air humidity, increase circulation air CO ₂ content. The present invention adopts "hot air internal circulation dehumidification during the flue-cured tobacco leaf preparation process". On the basis of the existing curing barn equipment, the air inlet door and the dehumidification window are sealed, and the hot air circulates inside the barn; The gaseous water in the circulating air in the room is converted into liquid water and discharged out of the barn; the heat released by the phase change of the water returns to the barn. "Increase the humidity of the circulating air", compared with the conventional flue-cured tobacco leaf modulation process, the relative humidity of the circulating air is increased by 3% to 5%, and the relative humidity is 80% to 90%. "Increase the CO ₂ content of the circulating air", compared with the conventional flue-cured tobacco leaf preparation process, increase the CO ₂ content of the circulating air by 30% to 50%, and the CO ₂ concentration is 0.070% to 0.080 _% . , the CO ₂ content of the circulating air increases.

Description

A preparation method for promoting rapid and uniform yellowing of flue-cured tobacco leaves

technical field

The invention belongs to the technical field of flue-cured tobacco preparation, and in particular relates to a preparation method for promoting rapid and uniform yellowing of flue-cured tobacco leaves.

Background technique

For many years, during the curing process of flue-cured tobacco, due to the slow yellowing and poor uniformity of the tobacco leaves, more energy was consumed, and the quality of tobacco leaf curing was uneven. This problem has become a bottleneck in the development of flue-cured tobacco modulation.

Contents of the invention

The purpose of the present invention is to provide a preparation method for promoting rapid and uniform yellowing of flue-cured tobacco leaves, which has the characteristics of reducing the energy consumption of flue-cured tobacco leaf preparation and improving the quality of tobacco leaf preparation.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A preparation method for promoting rapid and uniform yellowing of flue-cured tobacco leaves, comprising the following contents: during the preparation process of flue-cured tobacco leaves, hot air circulates and dehumidifies, increases the humidity of the circulating air, and increases the CO ₂ content of the circulating air.

Further, the specific steps of hot air internal circulation dehumidification during the flue-cured tobacco leaf preparation process are as follows: on the basis of the existing curing barn equipment, seal the air inlet door and the dehumidification window, and the hot air circulates inside the barn; and add a 3-4kW dehumidifier, The gaseous water in the circulating air in the barn is converted into liquid water and discharged out of the barn; the heat released by the phase change of the water returns to the barn.

Further, the step of increasing the humidity of the circulating air is as follows: Compared with the conventional flue-cured tobacco leaf preparation process, the relative humidity of the circulating air is increased by 3% to 5%, and the relative humidity is 80% to 90%.

Further, the steps for increasing the _CO2 content of the circulating air are: compared with the conventional flue-cured tobacco leaf preparation process, increasing the _CO2 content of the circulating air by 30% to 50%, and the _CO2 concentration is 0.070% to 0.080%; CO ₂ is produced, and the CO ₂ content of the circulating wind increases.

Compared with the prior art, the present invention has at least one of the following beneficial effects:

1. Compared with the conventional flue-cured tobacco leaf modulation technology, the present invention shortens the tobacco leaf modulation and yellowing time by 20% to 30%, and the tobacco leaf turns yellow in 36 to 48 hours; reduces the flue-cured tobacco leaf modulation energy consumption by 15% to 20%, and the unit initial flue-cured tobacco leaf consumption Electricity 1.50～2.50kW h/kg.

2. Compared with the conventional flue-cured tobacco leaf modulation technology, the present invention increases the uniformity of yellowing of tobacco leaves by 20%-30%, and the uniformity of tobacco leaf transformation by 90%-100%, improving the consistency of tobacco leaf modulation quality.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Example 1

In 2022, in Luliang County, Qujing City, Yunnan Province, a preparation method to promote rapid and uniform yellowing of flue-cured tobacco leaves includes three items: hot air circulation and dehumidification during the preparation of flue-cured tobacco leaves, increasing the humidity of the circulating air, and increasing the _CO2 content of the circulating air.

Dehumidification with hot air circulation in the flue-cured tobacco leaf preparation process: on the basis of the existing curing room equipment, seal the air inlet door and the moisture removal window, and the hot air circulates inside the curing room; add a 3.5kW dehumidifier to transfer The gaseous water is converted into liquid water and discharged out of the barn; the heat released by the phase change of water returns to the barn.

Increase the humidity of the circulating air: Compared with the conventional flue-cured tobacco leaf modulation process, the relative humidity of the circulating air is increased by 4.0%, and the relative humidity is 85%.

Increase the CO ₂ content of the circulating air: Compared with the conventional flue-cured tobacco leaf modulation process, the CO ₂ content of the circulating air is increased by 40.0%, and the CO ₂ concentration is 0.0725%.

The yellowing time, uniformity and energy consumption of the tobacco leaves during the curing process of the flue-cured tobacco leaves were measured, and the proportion and average price of the top-quality tobacco in the cured tobacco leaves are shown in Table 1.

Conventional technology (CK), select a hot air circulation intensive curing barn that meets the tobacco industry standard [National Tobacco Banzong (2009) No. 418 document] (without adding a dehumidifier, without increasing the humidity of the circulating air and the CO ₂ content of the circulating air), the tobacco leaves The tobacco leaves treated by the technology of the invention are the same, that is, the same variety, the same part, and the same maturity; the yellowing time, uniformity, and energy consumption of the tobacco leaves during the preparation of the flue-cured tobacco leaves are measured, and the proportion and average price of the top-grade tobacco in the cured tobacco leaves are shown in Table 1. shown.

Table 1 Comparison Table of Example 1 and Conventional Technology Measurement Results (Applied to Tobacco Areas in Northeast Yunnan)

A modulation method that promotes rapid and uniform yellowing of flue-cured tobacco leaves was applied in the northeast Yunnan tobacco area. Compared with the control, the tobacco leaves turned yellow in 42.00 hours, shortening the time of tobacco leaves modulation and yellowing by 27.59%; the yellowing uniformity of tobacco leaves was 95%, an increase of 26.67% ; Electricity consumption was 847.88 kW·h, which reduced the energy consumption of flue-cured tobacco leaves by 18.00%; the proportion of medium and high-grade tobacco increased by 10.01%; the average price increased by 4.13 yuan/kg. The implementation has achieved remarkable results.

Example 2

In 2022, in Luxi County, Honghe Prefecture, Yunnan Province, a preparation method to promote rapid and uniform yellowing of flue-cured tobacco leaves, including 3 items of hot air circulation and dehumidification during the preparation of flue-cured tobacco leaves, increasing the humidity of the circulating air, and increasing the CO ₂ content of the circulating air.

Dehumidification with hot air circulation in the flue-cured tobacco leaf preparation process: on the basis of the existing curing room equipment, seal the air inlet door and moisture removal window, and the hot air circulates inside the curing room; add a 3.0kW dehumidifier to transfer The gaseous water is converted into liquid water and discharged out of the barn; the heat released by the phase change of water returns to the barn.

Increase the humidity of the circulating air: Compared with the conventional flue-cured tobacco leaf modulation process, the relative humidity of the circulating air is increased by 4.5%, and the relative humidity is 87%.

Increase the CO ₂ content of the circulating air: Compared with the conventional flue-cured tobacco leaf modulation process, the CO ₂ content of the circulating air is increased by 45.0%, and the CO ₂ concentration is 0.0761%.

The yellowing time, uniformity and energy consumption of the tobacco leaves during the preparation process of the flue-cured tobacco leaves were measured, and the proportion and average price of the top-quality tobacco in the cured tobacco leaves are shown in Table 2.

Conventional technology (CK), select one set of hot air circulation intensive curing barn that meets the tobacco industry standard [National Tobacco Banzong (2009) No. 418 document] (do not increase the dehumidifier, do not increase the humidity of the circulating air and the _CO content of the circulating air)), The tobacco leaves are the same as the tobacco leaves processed by the invention technology, that is, the same variety, the same part, and the same maturity; the yellowing time, uniformity, and energy consumption of the tobacco leaves during the preparation of the flue-cured tobacco leaves are measured, and the proportion and average price of the top-grade tobacco in the flue-cured tobacco leaves are shown in the table 2.

Table 2 Comparison Table of Example 2 and Measurement Results of Conventional Techniques (Applied to Tobacco Areas in Southeast Yunnan)

A modulation method that promotes rapid and uniform yellowing of flue-cured tobacco leaves was applied in the southeast Yunnan tobacco area. Compared with the control, the tobacco leaves turned yellow in 44.00 hours, shortening the time of tobacco leaves modulation and yellowing by 29.03%; the yellowing uniformity of tobacco leaves was 98%, an increase of 25.64% ; The electricity consumption is 889.88kW·h, which reduces the energy consumption of flue-cured tobacco leaf modulation by 17.41%; the proportion of medium and high-grade tobacco increases by 10.83%; the average price increases by 4.34 yuan/kg. The implementation has achieved remarkable results.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it is to be understood that numerous other modifications and implementations can be devised by those skilled in the art which will fall within the scope of the disclosure disclosed in this application. within the scope and spirit of the principles. More specifically, within the scope of the disclosure and claims of the present application, various modifications and improvements can be made to the components and/or layout of the subject combination layout. In addition to variations and modifications to the component parts and/or layout, other uses will be apparent to those skilled in the art.

Claims (4)

1. A modulation method for promoting the rapid and uniform yellowing of flue-cured tobacco leaves is characterized by comprising the following steps: the method comprises the following steps: hot air internal circulation dehumidification, increase of circulating air humidity and increase of circulating air CO in the curing process of flue-cured tobacco leaves ₂ And (4) content.

2. The modulation method for promoting quick and uniform yellowing of flue-cured tobacco leaves according to claim 1, characterized by comprising the following steps: the hot air internal circulation dehumidification method in the flue-cured tobacco leaf modulation process comprises the following specific steps: on the basis of the existing curing barn equipment, an air inlet door and a moisture exhaust window are sealed, and hot air circulates in the curing barn; a dehumidifier with 3-4 kW is added to convert gaseous water in circulating air in the curing barn into liquid water to be discharged out of the curing barn; the heat released by the phase change of the water returns to the curing barn.

3. The modulation method for promoting quick and uniform yellowing of flue-cured tobacco leaves according to claim 1, characterized by comprising the following steps: the steps of increasing the humidity of the circulating air are as follows: compared with the conventional flue-cured tobacco leaf curing process, the relative humidity of the circulating air is improved by 3-5%, and the relative humidity is 80-90%.

4. The modulation method for promoting quick and uniform yellowing of flue-cured tobacco leaves according to claim 1, characterized by comprising the following steps: increase circulating air CO ₂ The content steps are as follows: compared with the conventional flue-cured tobacco leaf curing process, the method improves the circulating air CO ₂ 30-50% of CO ₂ The concentration is 0.070% -0.080%; the hot air is internally circulated, and the tobacco leaves are metabolized by respiration to generate CO ₂ Circulating air CO ₂ The content is increased.