Method for continuous microwave expansion of cut tobacco

A technology of microwave expansion and shredded tobacco, which is applied in the field of shredded tobacco expansion technology and cyclic technology of shredded tobacco expansion, which can solve the problems of poor filling performance, high energy consumption, and failure of continuous production of expanded shredded tobacco, and achieve the effect of stable temperature changes inside and outside shredded tobacco

Active Publication Date: 2010-01-06
BEIJING INST OF AEROSPACE TESTING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The shredded tobacco expansion process mainly adopts hot steam, vulcanized bed and other methods to expand shredded tobacco. For example, patent application CN200510010637 uses water as the medium to heat and humidify shredded tobacco. Dehumidification promotes the expansion of shredded tobacco, and the obtained expanded shredded tobacco has poor filling performance and high energy consumption.
Microwave technology is mainly used

Method used

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  • Method for continuous microwave expansion of cut tobacco

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Such as figure 1 As shown, the cut tobacco is pretreated so that its moisture content is 15% of the weight of the cut tobacco, and 200Kg of the treated tobacco is added to the impregnation tank that has been preheated to 70°C; the impregnation tank is evacuated to make the pressure 0.01 Mpa; add 100Kg of liquid expansion agent to the impregnation tank, the expansion agent consists of 85% pentafluorobutane (1,1,1,3,3-pentafluorobutane), 15% heptafluoropropane (1,1 , 1,2,3,3,3-heptafluoropropane), and then vaporize about 70Kg (300Kg) of liquid expansion agent into the impregnation tank to increase the pressure in the impregnation tank to 0.8Mpa and the temperature to 110 ℃, immerse for 30min under the above temperature and pressure conditions;

[0065] After the cut tobacco is impregnated, the gas and liquid expansion agents are recovered and reused separately. After the recovery is completed, the cut tobacco is discharged and sent to the microwave expansion equipment. The ...

Embodiment 2

[0067] Pre-treat the cut tobacco so that its water content is 17% of the weight of the cut tobacco. Take 200Kg of the treated cut tobacco and add it to the impregnation tank that has been preheated to 65°C; vacuum the impregnation tank to make the pressure 0.03Mpa; Add 200Kg of liquid expansion agent to the dipping tank, the expansion agent is 80% pentafluorobutane (1,1,1,3,3-pentafluorobutane), 20% pentafluoropropane (1,1, 1,3,3-pentafluoropropane), and then vaporize 200Kg of liquid expansion agent into the impregnation tank to increase the pressure in the impregnation tank to 0.5Mpa and the temperature to 100°C. At the above temperature and pressure Soak for 10min under the conditions of

[0068] After the cut tobacco is impregnated, the gas and liquid expansion agents are recovered and reused separately. After the recovery is completed, the cut tobacco is discharged and sent to the microwave expansion equipment. The microwave power density is 8KW / m 2 The expanded shredded toba...

Embodiment 3

[0070] Pre-treat the cut tobacco so that its water content is 25% of the weight of the cut tobacco. Take 200Kg of the treated cut tobacco and add it to the impregnation tank that has been preheated to 75°C; vacuum the impregnation tank to make the pressure 0.005Mpa; Add 130Kg of liquid expansion to the impregnation tank, the expansion agent is a mixture of 95% pentafluorobutane and 5% hexafluoropropane, and then 190Kg of liquid expansion agent is vaporized and passed into the impregnation tank to increase the pressure in the impregnation tank To 0.7Mpa, the temperature is raised to 80℃, and immersed for 20min under the above temperature and pressure conditions;

[0071] After the cut tobacco is impregnated, the gas and liquid expansion agent are recovered and reused separately. After the recovery is completed, the cut tobacco is discharged and sent to the microwave expansion equipment. The microwave power density is 7KW / m 2 The expanded shredded tobacco is obtained by expansion tr...

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Abstract

A method for continuous microwave expansion of cut tobacco comprises the following steps: impregnating the cut tobacco in an expanding agent; recycling the expanding agent in an impregnating device after impregnation; carrying out microwave expansion on the impregnated cut tobacco by a microwave dryer to obtain the expanded cut tobacco. The expanded cut tobacco comprises one or more than two components of ethanol with 4-12 carbon atoms, ketone with 4-12 carbon atoms, halogenether with 2-12 carbon atoms, alkane with 3-12 carbon atoms or alkane with 3-12 carbon atoms substituted by 2 halogen atoms. The filling value of the expanded cut tobacco reaches above 7.5, the cutting ratio is above 90%, the moisture content after expansion is 12-13%, the expansion of the cut tobacco is even without water damaged cut tobacco; the whole set of devices has low energy consumption and high automation, and continuous closed mass production can be carried out.

Description

Technical field [0001] The invention relates to an expansion process in the tobacco industry, in particular to a cut tobacco expansion process in which an organic medium is used as the expansion medium, and more specifically to a circulation process in which a low boiling point organic medium is used as the expansion medium. Background technique [0002] Tobacco expansion technology is a new technology that developed rapidly in the late 1960s and early 1970s. After being expanded, the shredded tobacco can significantly increase the filling capacity, thereby reducing the consumption of tobacco leaves in a single box of the cigarette and reducing the nicotine content in the cigarette. Incorporating expanded shredded tobacco in cigarettes can enhance its combustion performance and thereby reduce the tar content in the cigarettes. It is estimated that adding 10% of expanded shredded tobacco to cigarettes can save 7-8% of shredded tobacco, and the tar content of each cigarette can be...

Claims

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Application Information

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IPC IPC(8): A24B3/18
Inventor 满鸣任宏杰杨继志何常青彭黔荣邓葵张华路兰卿宋建军解海鸥赖东辉杨大泉刘晓东惠建权蔡元青李慧
Owner BEIJING INST OF AEROSPACE TESTING TECH
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