CN112754060A - Tobacco redrying method for reducing miscellaneous gas - Google Patents
Tobacco redrying method for reducing miscellaneous gas Download PDFInfo
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- CN112754060A CN112754060A CN202110174631.5A CN202110174631A CN112754060A CN 112754060 A CN112754060 A CN 112754060A CN 202110174631 A CN202110174631 A CN 202110174631A CN 112754060 A CN112754060 A CN 112754060A
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- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims abstract description 61
- 244000061176 Nicotiana tabacum Species 0.000 title 1
- 241000208125 Nicotiana Species 0.000 claims abstract description 130
- 238000001035 drying Methods 0.000 claims abstract description 63
- 239000000463 material Substances 0.000 claims abstract description 48
- 239000000126 substance Substances 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 238000007602 hot air drying Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 229920001277 pectin Polymers 0.000 abstract description 9
- 239000001913 cellulose Substances 0.000 abstract description 4
- 229920002678 cellulose Polymers 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 44
- 238000012545 processing Methods 0.000 description 12
- 230000001953 sensory effect Effects 0.000 description 6
- 235000019504 cigarettes Nutrition 0.000 description 5
- 238000010835 comparative analysis Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007794 irritation Effects 0.000 description 2
- 239000001814 pectin Substances 0.000 description 2
- 235000010987 pectin Nutrition 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- FNEHAOQZWPHONV-UHFFFAOYSA-N 9h-carbazole;sulfuric acid Chemical compound OS(O)(=O)=O.C1=CC=C2C3=CC=CC=C3NC2=C1 FNEHAOQZWPHONV-UHFFFAOYSA-N 0.000 description 1
- 206010013911 Dysgeusia Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- AEMOLEFTQBMNLQ-BKBMJHBISA-N alpha-D-galacturonic acid Chemical compound O[C@H]1O[C@H](C(O)=O)[C@H](O)[C@H](O)[C@H]1O AEMOLEFTQBMNLQ-BKBMJHBISA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000013074 reference sample Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 235000019615 sensations Nutrition 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/10—Roasting or cooling tobacco
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/16—Classifying or aligning leaves
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B9/00—Control of the moisture content of tobacco products, e.g. cigars, cigarettes, pipe tobacco
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- Manufacture Of Tobacco Products (AREA)
Abstract
The invention discloses a tobacco redrying method for relieving miscellaneous gas, which comprises the following steps: carrying out pre-heating treatment on the tobacco leaf materials by adopting a microwave treatment mode to degrade substances capable of generating miscellaneous gas in the tobacco leaf materials, and carrying out pre-drying treatment on the tobacco leaf materials; after the preheating treatment is finished, performing hot air drying treatment on the tobacco leaf material in a drying area by adopting a low-temperature redrying mode; after drying, cooling the tobacco leaf material in a cooling area; and after cooling, carrying out moisture regain treatment on the tobacco leaf materials in the moisture regain area. According to the tobacco redrying method for reducing the miscellaneous gas, provided by the invention, the content of miscellaneous gas substances which can be generated by tobacco pectic substances, cellulose and the like can be effectively reduced by utilizing a microwave treatment technology, so that the miscellaneous gas of the tobacco is reduced; moreover, the microwave drying and the hot air drying are combined, so that the low-temperature redrying can be realized, the loss of aroma substances is effectively reduced, and the content of aroma substances is improved.
Description
Technical Field
The invention relates to the technical field of redrying processing, in particular to a tobacco redrying method for reducing miscellaneous gas.
Background
The tobacco leaf miscellaneous gas is the smell which is not the self smell of the tobacco, is obvious and unpleasant, and the problem of too much miscellaneous gas exists in part of tobacco leaf raw materials due to factors such as varieties, regions, growth positions and the like, so that the smoking quality of the tobacco leaves is reduced, and the industrial availability is severely restricted.
At present, the methods for reducing the miscellaneous gas of the tobacco leaves mainly comprise an additional fragrance method for covering the miscellaneous gas and a process method for reducing the miscellaneous gas, but have certain limitations. Although the external flavoring method can effectively cover the miscellaneous gas of the tobacco leaves, the style and the taste of the cigarettes can be changed due to the addition of the external flavoring, and the cigarettes are not easy to accept by consumers. The traditional process method mostly reduces the miscellaneous gas of the tobacco leaves through high-strength processing in the redrying processing stage, has larger loss of aroma substances and does not meet the requirements of the current flexible processing and low-strength processing.
Therefore, how to reduce the miscellaneous gas of the tobacco leaves by using a new redrying processing technology on the basis of considering the original quality of the tobacco leaves is an important subject of current research.
Disclosure of Invention
The invention aims to provide a tobacco redrying method for reducing miscellaneous gas, which aims to solve the problems in the prior art, and can effectively reduce the miscellaneous gas of the tobacco and improve the quality of the redried tobacco through a microwave drying stage, a hot air drying stage, a cooling stage and a moisture regaining stage.
The invention provides a tobacco redrying method for relieving miscellaneous gas, which comprises the following steps:
carrying out pre-heating treatment on tobacco leaf materials by adopting a microwave treatment mode so as to degrade substances capable of generating miscellaneous gas in the tobacco leaf materials, and carrying out pre-drying treatment on the tobacco leaf materials;
after the preheating treatment is finished, carrying out hot air drying treatment on the tobacco leaf material in a drying area by adopting a low-temperature redrying mode;
after drying, cooling the tobacco leaf material in a cooling area;
and after cooling, carrying out moisture regain treatment on the tobacco leaf materials in a moisture regain area.
The method for redrying tobacco leaves for reducing miscellaneous gas preferably adopts a microwave treatment mode to preheat tobacco leaf materials, and specifically comprises the following steps:
the tobacco leaf materials after threshing and air separating enter a tunnel type microwave heating system, and the tobacco leaf materials are preheated by adopting a microwave transmitting assembly of the microwave heating system.
The method for redrying the tobacco leaves for reducing the miscellaneous gas is preferably, wherein in the preheating process, the conveying speed of the tobacco leaf materials is set to be 15hz-40hz, and the microwave output power of a microwave heating system is set to be 50kW-60 kW.
The method for redrying tobacco leaves for reducing miscellaneous gas as described above, wherein, preferably, in the hot air drying process, the drying zone at least comprises a first drying zone, a second drying zone, a third drying zone and a fourth drying zone, the temperature of the first drying zone is set to be 45-55 ℃, the temperature of the second drying zone is set to be 62-72 ℃, the temperature of the third drying zone is set to be 59-69 ℃, the temperature of the fourth drying zone is set to be 51-61 ℃, and the conveying speed of tobacco leaf materials is set to be 15hz-40 hz.
In the method for redrying tobacco leaves capable of reducing miscellaneous gases, the temperature of the cooling zone is preferably set to be 30-40 ℃ in the cooling treatment process.
In the method for redrying tobacco leaves capable of reducing miscellaneous gases, the moisture regain area at least comprises a first moisture regain area and a second moisture regain area, the temperature of the first moisture regain area is 50-55 ℃, and the temperature of the second moisture regain area is 60-65 ℃.
The method for redrying tobacco leaves with reduced miscellaneous gas as described above, wherein before the pre-drying treatment, the method for redrying tobacco leaves with reduced miscellaneous gas preferably further comprises:
and carrying out vacuum moisture regain treatment on the tobacco leaf materials in a vacuum moisture regain area.
The method for redrying the tobacco leaves for reducing the miscellaneous gas comprises the following steps of setting two moisture-regaining cycles in the vacuum moisture-regaining treatment process, wherein the first moisture-regaining cycle is set to be 5-10 min, the temperature in the first moisture-regaining cycle is set to be 28-38 ℃, after the first moisture-regaining cycle is finished, the second moisture-regaining cycle is started at an interval of 2min, the second moisture-regaining cycle is set to be 5-10 min, and the temperature in the second moisture-regaining cycle is set to be 25-35 ℃.
The invention provides a microwave drying and redrying method for tobacco sheets with fragrance-preserving function, which can effectively reduce the content of substances capable of generating miscellaneous gas, such as pectic substances, cellulose and the like in tobacco leaves by utilizing a microwave treatment technology, thereby reducing the miscellaneous gas of the tobacco leaves; moreover, by combining microwave drying and hot air drying, low-temperature redrying can be realized, the loss of aroma substances is effectively reduced, and the content of aroma substances is improved; meanwhile, the content of the aroma substances can be effectively improved, and the sensory quality is improved.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 is a flowchart of an embodiment of a method for redrying tobacco leaves to reduce offensive odors according to the present invention.
Detailed Description
In order to make the technical field of the invention better understand the scheme of the embodiment of the invention, the embodiment of the invention is further described in detail with reference to the drawings and the implementation mode.
Although the existing additional aroma method adopted for reducing the miscellaneous gas of the tobacco leaves can effectively cover the miscellaneous gas of the tobacco leaves, the style and the taste of the cigarettes can be changed due to the addition of the exogenous spice, so that the cigarettes are not easily accepted by consumers; the adopted process method mostly reduces the miscellaneous gas of the tobacco leaves through high-strength processing in the redrying processing stage, and does not meet the requirements of the current flexible processing and low-strength processing. The invention provides a tobacco redrying method for reducing miscellaneous gas aiming at middle and low-end tobacco raw materials, and the tobacco redrying method effectively reduces the miscellaneous gas of the tobacco and improves the quality of the redried tobacco through a microwave drying stage, a hot air drying stage, a cooling stage and a moisture regaining stage.
As shown in fig. 1, an embodiment of the present invention provides a tobacco redrying method for reducing miscellaneous gases, including the following steps:
step S1, carrying out pre-heating treatment on tobacco leaf materials by adopting a microwave treatment mode to degrade substances capable of generating miscellaneous gas in the tobacco leaf materials, and carrying out pre-drying treatment on the tobacco leaf materials;
the microwave treatment is a novel technology at present, and has a certain effect on reducing the content of pectic substances in plants, wherein the pectic substances are important components causing the sharp sensation and the miscellaneous gas of tobacco leaves. Therefore, the microwave treatment can effectively reduce the miscellaneous gas of the tobacco leaves, and the microwave treatment can realize low-temperature quick drying and maintain the nutrient components of the tobacco leaf materials to the maximum extent. Therefore, the invention adopts a mode of combining microwave treatment and hot air drying, reduces the pectic substance content of the tobacco leaves by using the microwave treatment, and further lightens the miscellaneous gas of the tobacco leaves and improves the quality of the tobacco leaves after redrying by using the low-temperature hot air drying.
Wherein, adopt the microwave processing mode, carry out preheating treatment to the tobacco leaf material, specifically include:
the tobacco leaf materials after threshing and air separating enter a tunnel type microwave heating system, and the tobacco leaf materials are preheated by adopting a microwave transmitting assembly of the microwave heating system.
The tobacco leaves after threshing and stem removing enter a tunnel type microwave heating system, then the microwave emission assembly of the microwave heating system is utilized, tobacco leaf materials can directly receive microwave energy within a certain frequency range, and therefore pectic substances, cellulose and other substances in the tobacco leaves are promoted to be degraded, and the purpose of reducing the miscellaneous gas of the tobacco leaves is achieved; meanwhile, the tobacco leaves can be pre-dried by microwave treatment. Specifically, in the preheating process, the conveying speed of the tobacco leaf materials is set to be 15hz-40hz, and the microwave output power of a microwave heating system is set to be 50kW-60 kW. The moisture of the tobacco leaves after microwave drying is 12-14%.
Further, before the pre-drying treatment, the method for redrying the tobacco leaves for reducing the miscellaneous gas further comprises the following steps:
and carrying out vacuum moisture regain treatment on the tobacco leaf materials in a vacuum moisture regain area.
The purpose of the vacuum moisture regain treatment is to reduce the processing strength and suitably prolong the moisture regain period by suitably prolonging the heat preservation time. Specifically, two moisture regaining cycles are set in the vacuum moisture regaining treatment process, wherein a first moisture regaining cycle is set to be 5-10 min, the temperature in the first moisture regaining cycle is set to be 28-38 ℃, a second moisture regaining cycle is started at an interval of 2min after the first moisture regaining cycle is finished, the second moisture regaining cycle is set to be 5-10 min, and the temperature in the second moisture regaining cycle is set to be 25-35 ℃.
Step S2, after the preheating treatment is finished, hot air drying treatment is carried out on the tobacco leaf materials in a drying area in a low-temperature redrying mode;
in the hot air drying treatment, the tobacco leaves are further dried by adopting a low-temperature redrying mode, the hot air drying aims at drying the tobacco leaves and the tobacco stems to a moisture inflection point and simultaneously taking away miscellaneous gas in the tobacco leaves by hot air. When setting the parameters of the drying section, the temperature of the drying area needs to be reduced, and the material conveying speed needs to be increased.
Specifically, in the hot air drying process, the drying zone at least comprises a first drying zone, a second drying zone, a third drying zone and a fourth drying zone, the temperature of the first drying zone is set to be 45-55 ℃, the temperature of the second drying zone is set to be 62-72 ℃, the temperature of the third drying zone is set to be 59-69 ℃, the temperature of the fourth drying zone is set to be 51-61 ℃, and the conveying speed of the tobacco leaf materials is set to be 15-40 hz. The moisture of the tobacco leaves after hot air drying is 8-10%.
Step S3, after drying is finished, cooling the tobacco leaf material in a cooling area;
the cooling treatment aims at cooling the tobacco leaves after being dried by hot air. Specifically, in the cooling treatment process, the temperature of the cooling zone is set to be 30-40 ℃. The temperature of the tobacco leaves after cooling is 32-40 ℃, and the moisture is 9-11%.
And step S4, after the cooling is finished, carrying out moisture regain treatment on the tobacco leaf materials in a moisture regain area.
The moisture regaining treatment aims to increase the moisture of material leaves, finally enables the redried tobacco strips to meet the boxing requirement, is convenient to store and reduces the breakage. Specifically, in the moisture regaining treatment process, the moisture regaining area at least comprises a first moisture regaining area and a second moisture regaining area, the temperature of the first moisture regaining area is set to be 50-55 ℃, and the temperature of the second moisture regaining area is set to be 60-65 ℃. The moisture content of the tobacco leaves after moisture regain is 11.5% -12.5%.
In one embodiment, the method of the present invention is used for redrying the tobacco leaf of the complex B3F with heavy miscellaneous gas, and the specific steps are as follows:
(1) and the vacuum moisture regaining stage is set to be two moisture regaining periods, wherein each period is subjected to moisture regaining for 10min, the vacuum moisture regaining temperature of the first period is 38 ℃, the interval is 2min, the second vacuum moisture regaining period is started, and the moisture regaining temperature is 35 ℃.
(2) In the microwave drying stage, the conveying speed of tobacco leaf materials is set to be 30hz, and the microwave output power is 60 kW. After the microwave drying is finished, the water content of the tobacco leaves is 14%.
(3) And in the hot air drying stage, the temperature of the first drying area is set to be 48 ℃, the temperature of the second drying area is set to be 65 ℃, the temperature of the third drying area is set to be 64 ℃, the temperature of the fourth drying area is set to be 60 ℃, and the conveying speed of the tobacco leaf materials is set to be 40 hz. The moisture content of the tobacco leaves after hot air drying is 10 percent.
(4) And in the cooling stage, the temperature of a cold room is 40 ℃, the temperature of the cooled tobacco leaves is 42 ℃, and the moisture content is 9.5%.
(5) In the moisture regaining stage, the temperature of the first moisture regaining area is set to be 55 ℃, and the temperature of the second moisture regaining area is set to be 60 ℃. The moisture content of the tobacco leaves after moisture regain is 12.5 percent, and the tobacco leaves meet the moisture standard of tobacco strips.
The redried strips obtained by the conventional redrying method are taken as a reference sample, the redried strips obtained in the above examples are taken as test samples, sampling treatment is respectively carried out, the pectin content of the sample is determined by adopting a carbazole sulfuric acid spectrophotometry, and the comparative analysis results of the pectin content of the strips by the microwave drying redrying method and the conventional method are shown in table 1.
TABLE 1
As can be seen from table 1, compared with the conventional redrying method, the microwave drying method significantly reduces the content of the harmful substances such as pectic substances in the tobacco leaves, and is beneficial to improving the quality of the redried tobacco strips.
In addition, the control sample and the test sample were cut and baked, respectively, rolled into a single cigarette, subjected to comparative evaluation, and quantified by scoring sensory indicators (aroma quality a, aroma quantity B, concentration C, fineness D, aftertaste E, miscellaneous gas F, irritation G, and strength H) in nine-point system, the sensory quality total formula was (T) ═ a + B) × 2.0+ (C + D) × 1.5+ E + F + G + H, and the sensory quality comparative analysis results of the tobacco sheet by the microwave drying redrying method and the ordinary redrying method are shown in table 2.
TABLE 2
As can be seen from Table 2, compared with the conventional redrying method, the microwave drying redrying method has an obvious improvement effect on the tobacco raw materials with heavy miscellaneous gas, which shows that the scores of the miscellaneous gas and the irritation of the tobacco are obviously reduced, the scores of the aroma quality and the aroma quantity of the tobacco are improved, and the integral sensory quality is obviously improved.
According to the tobacco redrying method for reducing the miscellaneous gas, provided by the embodiment of the invention, the content of miscellaneous gas substances which can be generated by tobacco pectic substances, cellulose and the like can be effectively reduced by utilizing a microwave treatment technology, so that the miscellaneous gas of the tobacco is reduced; moreover, by combining microwave drying and hot air drying, low-temperature redrying can be realized, the loss of aroma substances is effectively reduced, and the content of aroma substances is improved; meanwhile, the content of the aroma substances can be effectively improved, and the sensory quality is improved.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (8)
1. A tobacco redrying method for reducing miscellaneous gas is characterized by comprising the following steps:
carrying out pre-heating treatment on tobacco leaf materials by adopting a microwave treatment mode so as to degrade substances capable of generating miscellaneous gas in the tobacco leaf materials, and carrying out pre-drying treatment on the tobacco leaf materials;
after the preheating treatment is finished, carrying out hot air drying treatment on the tobacco leaf material in a drying area by adopting a low-temperature redrying mode;
after drying, cooling the tobacco leaf material in a cooling area;
and after cooling, carrying out moisture regain treatment on the tobacco leaf materials in a moisture regain area.
2. The method for redrying tobacco leaves capable of reducing miscellaneous gas according to claim 1, wherein the preheating treatment of tobacco leaf materials is carried out in a microwave treatment mode, and specifically comprises the following steps:
the tobacco leaf materials after threshing and air separating enter a tunnel type microwave heating system, and the tobacco leaf materials are preheated by adopting a microwave transmitting assembly of the microwave heating system.
3. The method of redrying hybrid gas-reducing tobacco leaves according to claim 2, wherein in the preheating process, the conveying speed of the tobacco leaf material is set to 15hz to 40hz, and the microwave output power of the microwave heating system is set to 50kW to 60 kW.
4. The method for redrying hybrid gas-reducing tobacco leaves according to claim 1, wherein in the hot air drying process, the drying zones at least comprise a first drying zone, a second drying zone, a third drying zone and a fourth drying zone, the temperature of the first drying zone is set to be 45 ℃ -55 ℃, the temperature of the second drying zone is set to be 62 ℃ -72 ℃, the temperature of the third drying zone is set to be 59 ℃ -69 ℃, the temperature of the fourth drying zone is set to be 51 ℃ -61 ℃, and the conveying speed of the tobacco leaf material is set to be 15hz-40 hz.
5. The method of redrying miscellaneous gas-reduced tobacco leaves according to claim 1, wherein in the cooling treatment, the temperature of the cooling zone is set to 30 ℃ to 40 ℃.
6. The method for redrying hybrid gas-reducing tobacco leaves according to claim 1, wherein in the moisture-regaining treatment process, the moisture-regaining zone at least comprises a first moisture-regaining zone and a second moisture-regaining zone, the temperature of the first moisture-regaining zone is set to be 50-55 ℃, and the temperature of the second moisture-regaining zone is set to be 60-65 ℃.
7. The method of redrying miscellaneous gas-reduced tobacco leaves according to claim 1, wherein prior to the pre-drying treatment, the method further comprises:
and carrying out vacuum moisture regain treatment on the tobacco leaf materials in a vacuum moisture regain area.
8. The method for redrying the tobacco leaves with the reduced miscellaneous gas as claimed in claim 7, wherein two moisture-regaining cycles are set during the vacuum moisture-regaining treatment, wherein the first moisture-regaining cycle is set to be 5min-10min, the temperature in the first moisture-regaining cycle is set to be 28 ℃ to 38 ℃, after the first moisture-regaining cycle is finished, the second moisture-regaining cycle is started at an interval of 2min, the second moisture-regaining cycle is set to be 5min-10min, and the temperature in the second moisture-regaining cycle is set to be 25 ℃ to 35 ℃.
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|---|---|---|---|---|
| US4874000A (en) * | 1982-12-30 | 1989-10-17 | Philip Morris Incorporated | Method and apparatus for drying and cooling extruded tobacco-containing material |
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-
2021
- 2021-02-05 CN CN202110174631.5A patent/CN112754060A/en active Pending
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|---|---|---|---|---|
| US4874000A (en) * | 1982-12-30 | 1989-10-17 | Philip Morris Incorporated | Method and apparatus for drying and cooling extruded tobacco-containing material |
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| CN108095180A (en) * | 2016-11-25 | 2018-06-01 | 北京航天试验技术研究所 | It is a kind of to improve process and the device that piece tobacco quality is guaranteed the quality with storage |
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Application publication date: 20210507 |