CN105935149A

CN105935149A - Medium and low temperature CO2 expansion process for tobacco shred

Info

Publication number: CN105935149A
Application number: CN201610488467.4A
Authority: CN
Inventors: 张月华; 郜海民; 熊安言; 张爱忠; 高尊华; 王根发; 郭华诚; 许淑红; 吴艳艳; 张文海; 杨耀伟; 王雷; 李传奇; 张健
Original assignee: China Tobacco Henan Industrial Co Ltd
Current assignee: China Tobacco Henan Industrial Co Ltd
Priority date: 2016-06-29
Filing date: 2016-06-29
Publication date: 2016-09-14
Anticipated expiration: 2036-06-29
Also published as: CN105935149B

Abstract

The invention relates to a medium and low temperature CO2 expansion process for tobacco shred. The process includes the following steps that 1, the tobacco shred with the water content of 18-20% is soaked for 60-100 s in liquid-state CO2 to obtain dry ice tobacco shred; 2, the dry ice tobacco shred obtained in the step 1 is loosened and then quantitatively fed into an HT steam expansion device to be expanded in advance; 3, the tobacco shred expanded in advance is fed into a flash dryer to be expanded and dried, the flow rate of hot wind entering the flash dryer is 21-23 m/s, and the temperature of the hot wind is 200-230 DEG C. The treatment intensity of the CO2 process is reduced by adopting the process, the tobacco damage ratio in the expansion process is reduced, the proportion of whole shred of the expanded tobacco shred is improved to be 74-78%, the proportion of broken shred is reduced to be 1.4-2.1%, and the change rate of the proportion of whole shred is improved to be 73-77%.

Description

Low temperature in tobacco shred CO 2 Expansion process

Technical field

The present invention relates to Field of Tobacco, low temperature CO in specifically a kind of tobacco shred₂Expansion process, is mainly used in cigarette enterprise cut tobacco processed.

Background technology

At present during production of cigarettes, CO₂Tobacco expanding technology uses the most ripe and universal, and it has main steps that: Nicotiana tabacum L. prestores and shredding through leaf section vacuum conditioning, loosening and gaining moisture, mixed sheet, obtains the cut tobacco that moisture is 22%～24%, through liquid CO₂Certain time (60s) impregnates, form dry ice cut tobacco, after loose, again through high speed 27m/s～320 DEG C～the 350 DEG C instantaneous heating of hot blast of 31m/s high temperature, the intracellular dry ice of cut tobacco fully gasifies and goes out cell, so that cut tobacco fully expands, makes the cut tobacco of 6%～8% moisture, reaching moisture 12.7%～13.8% requirement after moisture regain, storage uses.Its advantage is that filling capacity is high, reaches 6.5 cm3/g～7.3 cm3/g, can effectively remove the miscellaneous QI in tobacco shred, improve the product quality of Medicated cigarette, reduces cigarette smoke tar content；Its shortcoming is in production process, and making of tobacco shred is broken relatively big, and the part chemical analysis loss of tobacco shred is serious, and fragrance loss is more, dried-up taste is laid particular stress on, flue gas drying, whole cut rate rate of change low 50%～60%, production cost is high, and has tobacco shred carbonization during production process, the most on fire time serious smolders.

Summary of the invention

For improving existing tobacco shred CO₂The tobacco shred that high-temperature expansion technology is brought make broken serious compared with chemical analysis loss big, tobacco shred, fragrance loss taste more, dried-up is laid particular stress on, whole cut rate is low, and during tobacco shred, have carbonization, the shortcoming and defect smoldered the most on fire time serious, the present invention provides low temperature CO in a kind of tobacco shred₂Expansion process.

For achieving the above object, the technical solution used in the present invention is, low temperature CO in a kind of tobacco shred₂Expansion process, it is characterised in that comprise the following steps: 1. the tobacco shred that moisture content is 18%～20% is immersed in liquid CO₂In, impregnate 60 ~ 100s, obtain dry ice tobacco shred；2. loose rear the entrance in HT steam expansion device by quantitative feeding of dry ice tobacco shred step 1. obtained carries out preexpanding；3. being sent into by the tobacco shred after preexpanding and carry out expansion drying in pneumatic conveyer dryer, the hot blast flow velocity entering pneumatic conveyer dryer is 21m/s～23m/s, temperature is 200 DEG C～230 DEG C.

Moisture content of cut tobaccos after described step 3. middle expansion drying is 12.5%-14.5%, and Filling power is 5.7 cm³/ g～6.4 cm³/g。

Preferably, material (loose rear dry ice tobacco shred) flow 1200kg/h, steam flow 100kg/h during described step 2. middle preexpanding, vapor (steam) temperature 150 ~ 160 DEG C, the time of preexpanding is 4 ~ 5 s.

The beneficial effect comprise that: use the technique of the present invention not only can obtain 5.7 cm³/ g～6.4 cm³/ g Filling power and the expanded cut tobacco of 12.5%-14.5% uniform moisture, more importantly reduce carbon dioxide process and process intensity, reduce expansion process and make broken, improve expanded cut tobacco whole cut rate, whole cut rate is 74%～78%, reduce filament broken rate, filament broken rate is 1.4%～2.1%, improve whole cut rate rate of change, whole cut rate rate of change is 73%～77%, add resist processing and the effective rate of utilization of tobacco shred, eliminate the dried-up taste of expanded cut tobacco, mouthfeel be improved significantly, physical quality and the aesthetic quality of expanded cut tobacco are coordinated, raw material use value is promoted, raw material range is widened, energy resource consumption reduces.

Detailed description of the invention

Below in conjunction with specific embodiment, the invention will be further described, but protection scope of the present invention is not limited to this.

Embodiment 1

Low temperature CO in a kind of tobacco shred₂Expansion process, comprises the following steps: 1. the tobacco shred that moisture content is 19% is immersed in liquid CO₂In, impregnate 100s, obtain dry ice tobacco shred；2. the dry ice tobacco shred loose (the loose roller of 40Hz is loose) step 1. obtained is entered by quantitatively (frequency 25Hz quantitatively carries) feeding afterwards and carries out preexpanding (dry ice flow of tobacco 1200kg/h after material loosening in HT steam expansion device (purchased from Qinhuangdao Tobacco Machinery Co., Ltd.), steam flow 100kg/h, vapor (steam) temperature 155 DEG C, the time of preexpanding is 4 s)；3. by carrying out expansion drying in tobacco shred feeding inverted cone pneumatic conveyer dryer (purchased from Qinhuangdao Tobacco Machinery Co., Ltd.) after preexpanding, (moisture content of cut tobaccos after expansion drying is 13.5%, and Filling power is 6.2 cm³/ g), the hot blast flow velocity entering pneumatic conveyer dryer is 22m/s, temperature is 220 DEG C.

The structure situation of change such as table 1 of the high-temperature expansion tobacco shred that the low-temperature expansion tobacco shred that the present embodiment prepares prepares with commonsense method:

Table 1

。

As can be seen from Table 1, compared with the high-temperature expansion tobacco shred that commonsense method prepares, though the expanded cut tobacco Filling power that the present embodiment prepares reduces 0.9cm³/ g, but whole cut rate increases 7.8 percentage points, and filament broken rate reduces 1.6 percentage points, particularly whole cut rate rate of change significantly improves, and improves 18.0 percentage points, it is seen that, resist processing and the effective rate of utilization of tobacco shred are obviously improved, and effectively reduce production process and make broken.

Each quality index of the high-temperature expansion tobacco shred that low-temperature expansion tobacco shred and the commonsense method that the present embodiment prepares prepares is smoked panel test score such as table 2:

Table 2

。

In table 2, each quality index score uses 9 points of systems, and score value this index's quality the highest is the best, and score value is to be evaluated the average of score by 15 expert judging panels.The each quality index all ratio raisings having in various degree of high temperature of middle low-temperature expansion tobacco shred, miscellaneous QI one is obviously improved, and score value improves 1.2 points, has the withered and burnt smell of the expanded cut tobacco of low temperature in 13 sensations to have bigger reduction than high temperature in 15 judging panels.Also having raising in various degree in each quality index of smokeing panel test in other, fragrance loss is few, improves 0.7 point.

Embodiment 2

Low temperature CO in a kind of tobacco shred₂Expansion process, comprises the following steps: 1. the tobacco shred that moisture content is 18% is immersed in liquid CO₂In, impregnate 60s, obtain dry ice tobacco shred；2. the dry ice tobacco shred loose (the loose roller of 40Hz is loose) step 1. obtained is entered by quantitatively (frequency 25Hz quantitatively carries) feeding afterwards and carries out preexpanding (dry ice flow of tobacco 1200kg/h after material loosening in HT steam expansion device (purchased from Qinhuangdao Tobacco Machinery Co., Ltd.), steam flow 100kg/h, vapor (steam) temperature 150 DEG C, the time of preexpanding is 5 s)；3. by carrying out expansion drying in tobacco shred feeding inverted cone pneumatic conveyer dryer (purchased from Qinhuangdao Tobacco Machinery Co., Ltd.) after preexpanding, (moisture content of cut tobaccos after expansion drying is 14.5%, and Filling power is 5.7 cm³/ g), the hot blast flow velocity entering pneumatic conveyer dryer is 21m/s, temperature is 200 DEG C.

Embodiment 3

Low temperature CO in a kind of tobacco shred₂Expansion process, comprises the following steps: 1. the tobacco shred that moisture content is 20% is immersed in liquid CO₂In, impregnate 80s, obtain dry ice tobacco shred；2. the dry ice tobacco shred loose (the loose roller of 40Hz is loose) step 1. obtained is entered by quantitatively (frequency 25Hz quantitatively carries) feeding afterwards and carries out preexpanding (dry ice flow of tobacco 1200kg/h after material loosening in HT steam expansion device (purchased from Qinhuangdao Tobacco Machinery Co., Ltd.), steam flow 100kg/h, vapor (steam) temperature 160 DEG C, the time of preexpanding is 4 s)；3. by carrying out expansion drying in tobacco shred feeding inverted cone pneumatic conveyer dryer (purchased from Qinhuangdao Tobacco Machinery Co., Ltd.) after preexpanding, (moisture content of cut tobaccos after expansion drying is 12.5%, and Filling power is 6.4 cm³/ g), the hot blast flow velocity entering pneumatic conveyer dryer is 23m/s, temperature is 200 DEG C.

Claims

1. low temperature CO in a tobacco shred₂Expansion process, it is characterised in that comprise the following steps: 1. the tobacco shred that moisture content is 18%～20% is immersed in liquid CO₂In, impregnate 60 ~ 100s, obtain dry ice tobacco shred；2. loose rear the entrance in steam expansion device by quantitative feeding of dry ice tobacco shred step 1. obtained carries out preexpanding；3. being sent into by the tobacco shred after preexpanding and carry out expansion drying in pneumatic conveyer dryer, the hot blast flow velocity entering pneumatic conveyer dryer is 21m/s～23m/s, temperature is 200 DEG C～230 DEG C.

2. low temperature CO in tobacco shred as claimed in claim 2₂Expansion process, it is characterised in that the moisture content of cut tobaccos after described step 3. middle expansion drying is 12.5%-14.5%, and Filling power is 5.7 cm³/ g～6.4 cm³/g。

3. low temperature CO in tobacco shred as claimed in claim 1₂Expansion process, it is characterised in that mass flow 1200kg/h, steam flow 100kg/h during described step 2. middle preexpanding.