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Method for calibrating drying box for determining tobacco moisture and method for determining tobacco moisture

A technology of moisture and tobacco, which is applied in the field of moisture measurement in tobacco, can solve problems such as inconsistency of moisture detection results, and achieve the effect of solving errors

Active Publication Date: 2008-02-20
CHINA TOBACCO HUNAN INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it ignores the inconsistency of the moisture detection results of the same sample in different ovens due to the different structure, oven fan speed, and temperature rise time of different ovens.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Preparation of standard moisture samples: Take 1000 grams of finished cut tobacco, grind it into tobacco powder of about 80 meshes through a grinder, and balance the batch of samples in a constant temperature and humidity box with a humidity of 60±2% and a temperature of 22±1°C for 96 hours. Get 30 grams of samples by quartering method and divide into three parts and measure according to the standard method of current moisture determination in the oven calibrated by thermometer, and its moisture content is respectively 12.1%, 11.9%, 12.0%. Therefore, we determined this batch of samples as standard water samples with a moisture content of 12.0%. Divide the standard water sample into several 50-gram samples, and put them in special pop-top cans after being balanced in a constant temperature and humidity box with a humidity of 60±2% and a temperature of 22±1°C for 24 hours. %, sealed and stored under constant temperature and humidity conditions at a temperature of 22±1°C. ...

Embodiment 2

[0014] Take 30 grams of the standard sample in Example 1 from the sealed pop-top can at each use, evenly divide it into 3 parts, and check the oven of the quality supervision and inspection station repeatedly until the oven measures the standard moisture sample value at 12.0 ± 0.1% within.

[0015] The verification results are as follows:

[0016] Moisture determination results of standard moisture samples (%)

[0017] After more than three checks and one reproducibility test, the oven was determined to have a moisture determination reliability greater than 95%. It can be used as an oven for measuring the moisture content of tobacco products in process and calibrating online moisture instruments.

Embodiment 3

[0019] Each time with the standard sample in Example 1, use the method in Example 2 to check the ovens at the two processing points A and B several times until the oven measures the standard moisture sample value within 12.0 ± 0.1%. The moisture content of cut tobacco produced in A is tested in A and B. The result is as follows:

[0020] Moisture determination results of shredded tobacco produced in place A (%)

[0021] Due to the long-distance transportation of the shredded tobacco processed in A, the moisture will be lost to a certain extent, which is very normal, and it also shows that the standard moisture sample has played its due role in the calibration oven.

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PUM

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Abstract

The utility model relates to a calibration method for the oven which is used for measuring water in the tobacco and a method for measuring the water in the tobacco; wherein the calibration method for the oven which is used for measuring water in the tobacco is as follows: a standard sample with known water content is put into the oven to be calibrated to do the test on a prescriptive environmental condition, then the difference between the determination result and the standard value is calculated, then the fan velocity and the heating curve of the oven are adjusted until the determination result and the standard value are uniform according to the difference. The utility model can guarantee the product quality stability and consistency of the same brand tobacco produced by different production lines and different manufacturing sites by calibrating any oven as the tool for calibrating the on-line water determinative instrument.

Description

technical field [0001] The present invention relates to a method for calibrating an oven for measuring the moisture content of tobacco. Further, the present invention also relates to a method for measuring moisture in tobacco. Background technique [0002] In the moisture detection of tobacco products, the oven method is usually used as the highest measuring instrument for the online moisture meter in the calibration process control, and the oven method is used to detect the final moisture of tobacco products as the only basis for judging whether the moisture is qualified. However, because it is impossible for a factory to have only one oven, especially in the new form, mergers and reorganizations between the tobacco industry, and the off-site processing of big brands have become an indisputable fact, which has brought about different production points and different ovens. 1. Different operators have different differences in the test results of the same sample. This differe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G12B13/00
Inventor 刘建福易浩尹大锋廖文大尹宾陈刚谭新良
Owner CHINA TOBACCO HUNAN INDAL CORP
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