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A method for determination of a tobacco drying curve

A technology of drying curve and tobacco, which is applied in the directions of measuring devices, measuring instruments, surveying and navigation, etc., can solve the problems affecting the measurement accuracy, unstable operation, large system error, etc., and achieve stable drawing method, good test precision, The effect of simple operation process

Active Publication Date: 2015-07-22
CHINA TOBACCO HENAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, interval sampling and weighing are carried out outside the oven. The drying process is discontinuous and there are many manual steps, which is likely to cause great interference to the measurement results and cause large system errors.
Invention patent CN 102095658 A discloses a method for measuring the moisture content of sheet tobacco, which mainly uses a microwave moisture meter to detect the moisture content of a large number of stored tobacco sheets, and does not involve continuous detection of moisture content during the tobacco drying process
Invention patent CN 101131344A discloses an on-line determination of tobacco drying characteristics and kinetic analysis method. This method must be carried out by using its self-made heat and humidity treatment analysis device (public number CN1793831), which has long debugging time and unstable operation. Disadvantages, affect the accuracy of the determination

Method used

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  • A method for determination of a tobacco drying curve
  • A method for determination of a tobacco drying curve
  • A method for determination of a tobacco drying curve

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Embodiment 1 (verify the precision of the method provided by the present invention)

[0015] Taking Xiangxian B2F flue-cured tobacco slices as the experimental object, the wet basis moisture content of the samples at each time was measured with reference to the method provided by the present invention, and the drying curve was drawn.

[0016] 1) Take Xiangxian B2F flue-cured tobacco slices, cut into cut tobacco with a width of 1.0~1.1mm, adjust the moisture content of the sample to 20~26% on a wet basis; take a 10±2g sample, and use the oven method to measure the initial moisture content of the sample W 0湿 .

[0017] 2) Take 6 groups of samples, each group of samples is 10±2g, put them into a flowing hot air oven with an electronic weighing system, continue to dry at 100°C for 10 minutes, and weigh them at intervals during the drying process. 1min, record the sample weight m at time t t .

[0018] 3) After 10 minutes, the equipment will automatically stop, and the dr...

Embodiment 2

[0022] Determination of tobacco drying curve, comprising the following steps:

[0023] 1) Take Xiangxian B2F, Yuxi COB-S, and Kunming C2F three kinds of flue-cured tobacco slices, cut into shredded tobacco with a width of 1.0~1.1mm, adjust the dry basis moisture content of the sample to 25~35%, and obtain the sample to be tested; each sample Take 10 ± 2g, and use the oven method to measure the initial dry basis moisture content W of the sample 0干 .

[0024] 2) Take 10±2g of each sample, place them in a flowing hot air oven with an electronic weighing system, dry continuously at 90°C for 30 minutes, and weigh them at intervals during the drying process. The weighing interval is 3 minutes, and record Initial sample weight m 0 , sample weight m at time t t .

[0025] 3) The equipment will automatically stop at the end of the set 30 minutes, and the dry basis moisture content W of the sample at time t will be calculated according to the following formula after drying t干 :W t...

Embodiment 3

[0030] Determination of tobacco drying curve, comprising the following steps:

[0031] 1) Take Yunnan Qujing C2F, American US-C1, and Fujian Nanping C2F three kinds of flue-cured tobacco slices, cut into shredded tobacco with a width of 1.0~1.1mm, adjust the dry basis moisture content of the sample to 25~35%, and obtain the sample to be tested; Take 10 ± 2g of the sample, and use the oven method to measure the initial dry basis moisture content W of the sample 0干 .

[0032] 2) Take 10±2g of each sample, place them in a flowing hot air oven with an electronic weighing system, and keep drying at 110°C for 20 minutes, and weigh them at intervals during the drying process. The weighing interval is 2 minutes, and record Initial sample weight m 0 , sample weight m at time t t .

[0033] 3) After 20 minutes of drying, the equipment will automatically stop, and then calculate the dry basis moisture content W of the sample at time t according to the following formula t干 :W t干 =m ...

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Abstract

The invention relates to a method for determination of a tobacco drying curve, and belongs to the technical field of tobacco drying. The method comprises 1) a step of weighing a sample and determining an initial water content W<0> of the sample by utilizing a baking oven method; 2) a step of weighing a second sample of the same batch; placing the second sample into a flowing-hot-air baking oven having an electron weighing system; drying continuously at 90-130 DEG C and weighing at an interval of 1-3 min during the drying process; and recording an initial sample weight m<0> and each sample weight m<t> at t moment; and 3) a step of calculating each sample water content W<t> at t moment according to the formula W<t>=m<t>(1+W<0>) / m<0>-1 after drying is finished; and drawing a tobacco drying curve by taking the time t as a horizontal coordinate and the sample water content at the t moment as a vertical coordinate. Experiments demonstrate that the method provided by the invention has advantages of simple operation process, continuous drying process, small error, accuracy, reliability, and the like.

Description

technical field [0001] The invention belongs to the technical field of tobacco drying, in particular to a method for online measurement and drawing of tobacco drying curves. Background technique [0002] Tobacco drying is a key process in cigarette processing, which has an important impact on the processing quality of cigarette products. Tobacco leaves of different varieties, production areas, parts, and grades have different drying rates due to differences in tissue structure and chemical composition. How to accurately measure the drying rate of tobacco leaves, draw drying curves, and truly reflect the drying characteristics of different tobacco leaves is the basis for studying the characteristics of cigarette drying and processing. [0003] At present, the determination of tobacco drying rate mainly adopts the oven method (YC / T31-1996 tobacco and tobacco product sample preparation and moisture determination oven method), that is, the sample to be tested is put into the ov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C15/00F42D3/02F42D1/00
Inventor 丁美宙刘强王聚奎
Owner CHINA TOBACCO HENAN IND
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