Method for expanding tobacco shred

A technology for expanding shredded tobacco and shredded tobacco is applied in the field of expanding shredded tobacco, which can solve the problems of low safety, low expansion rate, large technical loss, etc., and achieve the effects of simple system equipment, good expansion effect and high safety.

Active Publication Date: 2009-08-26
YUNNAN REASCEND TOBACCO TECH GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high liquefaction pressure of the carbon dioxide expansion process and the freezing of the shredded tobacco after impregnation and decompression determine the complexity and high cost of the process, and the carbon dioxide expansion technology has a large loss, high equipment repair and maintenance costs, and a large loss of tobacco aroma. , heavy coke gas, dry flue gas, high crushing rate
Although the expansion temperature of nitrogen expansion is low, no pollution, no residue, but the expansion rate is not high, because the pressure is too high, the requirements for the pressure resistance and safety of the equipment are high
[0004] In addition, U.S. Patent 5669397 and Patent CN1099587A us

Method used

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  • Method for expanding tobacco shred

Examples

Experimental program
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Example Embodiment

[0018] Example 1:

[0019] Pre-treat the cut tobacco raw material so that the moisture content of the cut tobacco is controlled at about 18%, preheat the container to 20°C to 21°C, put the cut tobacco in the container for decompression treatment, and stop the decompression when the pressure in the container is reduced to 3kPa. Introduce dimethyl ether vapor at 21°C, and when the pressure rises to 538kPa, keep the pressure for 20 minutes to fully impregnate the shredded tobacco with dimethyl ether, then reduce the pressure in the container to close to atmospheric pressure without destroying the micropore structure of the shredded tobacco cells, and release Excess dimethyl ether vapor. Inject water vapor into the container to quickly raise the temperature in the container to 135°C, stop injecting water vapor, and quickly reduce the pressure in the container to 50kPa after expansion and setting for 55s, and recover the residual dimethyl ether vapor at the same time, continue to d...

Example Embodiment

[0020] Example 2:

[0021] Pre-treat the cut tobacco raw material, control the moisture content of the cut tobacco at about 5%, preheat the container to 38°C, put the shredded tobacco in the container for decompression treatment, stop the decompression when the pressure in the container is reduced to 2.5kPa, and inject 35 ℃ dimethyl ether vapor, when the pressure rises to 866kPa, keep the pressure for 10min, and then reduce the pressure in the container to 110kPa without destroying the micropore structure of the cut tobacco cells, and release excess dimethyl ether vapor at the same time. Inject heated nitrogen gas into the container, quickly raise the temperature inside the container to 140°C, stop injecting nitrogen gas, and quickly reduce the pressure in the container to 50kPa after expanding and setting for 20s, and recover the residual dimethyl ether vapor at the same time, continue to reduce the pressure to 3kPa, Carry out vacuum readjustment to shredded tobacco, adjust m...

Example Embodiment

[0022] Example 3:

[0023] Pre-treat the cut tobacco raw material, control the moisture content of the cut tobacco at about 22%, preheat the container to 44°C to 45°C, put the cut tobacco in the container for decompression treatment, stop the decompression when the pressure in the container is reduced to 2kPa, and pass Inject dimethyl ether vapor at 48°C, keep the pressure for 30 minutes when the pressure rises to 1010kPa, then reduce the pressure in the container to close to 115kPa without destroying the microporous structure of the cut tobacco cells, and release excess dimethyl ether vapor at the same time. Inject heated carbon dioxide gas into the container, quickly raise the temperature in the container to 100°C, stop injecting carbon dioxide gas, and quickly reduce the pressure in the container to 50kPa after expanding and setting for 60 seconds, and recover the residual dimethyl ether vapor at the same time, continue to depressurize to 3kPa, carry out vacuum readjustment...

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PUM

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Abstract

The invention relates to a method for expanding tobacco shred, which is characterized in that the method comprises the following steps: 1, pre-treating a tobacco shred raw material to ensure the water content thereof to be between 5 and 25 percent; 2, treating the tobacco shred in a container by reducing pressure to ensure the pressure to be not higher than 6kPa, introducing dimethyl ether vapor at a temperature between 10 and 50 DEG C into the container to raise the pressure to 400-1,200kPa, keeping the pressure for 10-30 minutes, and thoroughly soaking the tobacco shred by the dimethyl ether vapor; 3, under the condition of not breaking micropore structures of tobacco shred cells, reducing the pressure to close to atmospheric pressure; 4, injecting water vapor or other heated inert medium into the container to quickly raise the temperature in the container to between 100 and 150 DEG C to expand and mold the tobacco shred; 5, reducing the pressure in the container to 3kPa, readjusting the tobacco shred in vacuum, and adjusting the water content to 12-13 percent; and 6, communicating the atmosphere to raise the pressure in the container to the atmospheric pressure. The method can effectively preserve aroma containing substances in the tobacco shred and with high boiling point, the expanding effect of the tobacco shred is good, the fragmenting rate is low, the safety is high, and no pollution or residue exists.

Description

technical field [0001] The invention belongs to a method for processing shredded tobacco, in particular to a method for expanding shredded tobacco. Background technique [0002] Expanded shredded tobacco, as one of the raw materials of cigarette formula, not only saves raw materials, but also improves the burning condition of shredded tobacco. The most important thing is to reduce the tar and carbon monoxide in cigarettes without reducing the aroma. [0003] There are many ways to expand shredded tobacco, but Freon expansion has not been well resolved due to its solvent residue and ozone layer destruction, and this method has been eliminated. At present, carbon dioxide and nitrogen are commonly used in the world. The high liquefaction pressure of the carbon dioxide expansion process and the freezing of the shredded tobacco after impregnation and decompression determine the complexity and high cost of the process, and the carbon dioxide expansion technology has a large loss,...

Claims

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Application Information

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IPC IPC(8): A24B3/18
Inventor 杨伟祖王保兴李军段安凌陈婉宋莲英资文华管仲李金华苏四清吴晓华刘坚李吉昌
Owner YUNNAN REASCEND TOBACCO TECH GRP
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