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Calculation model for temperature stabilization time of key point of flue-cured tobacco baking process

A technology of curing process and time calculation, which is applied to tobacco, tobacco preparation, tobacco processing and other directions, can solve problems such as artificial methods being affected by subjective factors, and achieve the effect of improving the accuracy of measurement

Active Publication Date: 2021-06-15
HUBEI TOBACCO SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a calculation model for the temperature stabilization time at key points in the flue-cured tobacco curing process, which solves the problem that the existing manual methods are affected by subjective factors by quantifying the characterization parameters of tobacco leaves

Method used

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  • Calculation model for temperature stabilization time of key point of flue-cured tobacco baking process
  • Calculation model for temperature stabilization time of key point of flue-cured tobacco baking process
  • Calculation model for temperature stabilization time of key point of flue-cured tobacco baking process

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Experimental program
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preparation example Construction

[0044] Tobacco leaf collection and representative tobacco leaf samples were prepared as follows:

[0045] (1) Tobacco collection:

[0046] The lower, middle and upper parts tobacco leaves of Yunyan 87 planted in Hubei Province and the lower, middle and upper parts tobacco leaves of K326 variety were collected respectively.

[0047] (2) Tobacco leaf sample preparation:

[0048] After the mature tobacco leaves were harvested, 15 pieces were randomly selected to measure the length, width, thickness, branch width and main vein width of the tobacco leaves.

[0049] (3) Tobacco leaf baking process formulation:

[0050] The water loss rate of tobacco leaves under each temperature and humidity is calculated by preset baking temperature and humidity and the length, width, thickness, branch width, and main vein width of tobacco leaves, and then the temperature stabilization time of each stage is calculated in combination with each stage of curing.

Embodiment

[0052] A calculation model for the temperature stabilization time at key points of the flue-cured tobacco curing process in this embodiment includes the following steps:

[0053] 1) Establish a tobacco leaf water loss rate model based on the greenhouse environment of the dense curing room and the thickness, length, and width of the tobacco leaf itself, the width of the branch veins at the leaf base, the width of the main veins at the tip, and the width of the main veins in the middle of the leaf, and according to each stage of curing Appropriate water loss calculation and stabilization time:

[0054]

[0055] W n =MR×R

[0056]

[0057] Among them, W is the theoretical water loss rate of tobacco leaves, unit (% / h); d is the size of the dry part of tobacco leaves, unit (m); ρ is the smoke density, unit (kg / m 3 ); λ is thermal conductivity of air, unit (W / m*℃); Vg is air kinematic viscosity, unit (m / s); ρ g is the density of moist air, unit (kg / m 3 ); g is the accelera...

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Abstract

The invention discloses a calculation model for the temperature stabilization time of a key point of a flue-cured tobacco baking process. The method comprises the steps of: establishing a tobacco leaf water loss rate model based on a bulk curing barn greenhouse environment and the thickness, the length, the width, the leaf base branch pulse width, the leaf tip main pulse width and the leaf middle main pulse width of tobacco leaves; measuring the thickness, the length, the width, the leaf base branch vein width, the leaf tip main vein width and the leaf middle main vein width of fresh tobacco leaves before baking, substituting the parameters into the tobacco leaf water loss rate model, and calculating the water loss rate of each tobacco leaf baking stage; and calculating the temperature stabilization time of each stage by dividing the water loss rate of each stage by the suitable water loss of each stage in the tobacco leaf curing process. By quantifying the characterization parameters of the tobacco leaves, the problem that an existing manual method is influenced by subjective factors is solved.

Description

technical field [0001] The invention belongs to the field of flue-cured tobacco curing, and in particular relates to a calculation model for temperature stabilization time at key points in a flue-cured tobacco curing process. Background technique [0002] At present, the "Technical Regulations for Flue-cured Tobacco Baking" requires changes in tobacco leaves at each stage of curing: yellowing leaves are required to be yellow with green veins, withered and collapsed, and main veins are soft at the end of the yellowing period at 42°C; yellow slices are required before the color-fixing period is 50°C Yellow tendons, small rolls, large rolls are required at 54-55°C, and one-third of the main veins are dry. At present, during the curing process, the yellowing and drying of tobacco leaves is mainly judged qualitatively based on human eyes and hands. It requires tobacco farmers or professional technicians to continuously observe and judge the color and shape changes of tobacco leav...

Claims

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Application Information

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IPC IPC(8): A24B3/10A24B3/04A24B1/02A24B9/00
CPCA24B3/10A24B3/04A24B1/02A24B9/00G06F30/20
Inventor 孙光伟陈振国李静浩宋朝鹏杨艳华刘小伟刘竞孙敬国李建平冯吉
Owner HUBEI TOBACCO SCI RES INST