A Calculation Model of Stabilization Time of Key Points in Flue-cured Tobacco Curing Process
A technology of baking process and time calculation, which is applied in the fields of tobacco, tobacco processing, and tobacco preparation, and can solve the problems that manual methods are affected by subjective factors, etc.
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[0044] Tobacco leaf collection and representative tobacco leaf samples were prepared as follows:
[0045] (1) Collection of tobacco leaves:
[0046] The tobacco leaves from the lower, middle and upper parts of Yunyan 87 grown in Hubei Province and the lower, middle and upper leaves of the 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 tobacco leaves.
[0049] (3) Tobacco leaf curing process formulation:
[0050] The water loss rate of tobacco leaves under each temperature and humidity is calculated by presetting the curing temperature and humidity, and tobacco leaf length, width, thickness, branch vein width, and main vein width, and then the temperature stabilization time of each stage is calculated in combination with each stage of curing.
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[0052] A calculation model of the temperature stabilization time at key points of the flue-cured tobacco curing process of the present embodiment includes the following steps:
[0053] 1) Establish a tobacco leaf water loss rate model based on the dense curing greenhouse environment and the thickness, length and width of the tobacco leaf itself, the width of the branches at the base of the leaf, the width of the main vein at the tip of the leaf, and the width of the main vein in the middle of the leaf. Appropriate water loss calculation and temperature 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 dried part of tobacco leaves, unit (m); ρ is the density of tobacco smoke, unit (kg / m) 3 ); λ is air thermal conductivity, unit (W / m*℃); Vg is air kinematic viscosity, unit (m / s); ρ g is the wet air density, unit (kg / m 3 ); g is the acceleration of gravit...
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