CN102038283B - Curing method of flue-cured tobacco leaf raw materials - Google Patents
Curing method of flue-cured tobacco leaf raw materials Download PDFInfo
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Abstract
The invention relates to a curing method of flue-cured tobacco leaf raw materials. When flue-cured tobacco raw materials are roasted and prepared in a curing barn, the environmental medium atmosphere in the curing barn is regulated, wherein a gas mixture containing two or more components selected from pure O2 or air, O2, N2, water vapor and CO2 is introduced into the curing barn. In the gas mixture, the content of air is no more than 33%. The content of O2 is no more than 80%. The content of N2 is no more than 31%. The content of water vapor is no more than 67%. The content of CO2 is no more than 75%.The process condition for processing the tobacco leaf raw materials is as follows: in the period of turning yellow of the tobacco leaves, the temperature of the tobacco leaves gradually rises to 42-45 DEG C from normal temperature, and the relative humidity range is between 95% to 70%; in the period of fixing the color of the tobacco leaves, the temperature of the tobacco leaves gradually rises to 55 DEG C-57 DEG C from the temperature at which the tobacco leaves turn yellow, the temperature rate is 0.3-2 DEG/h, and the relative humidity range is from 80% to 30%; and in the period of dying the veins of the tobacco leaves, the temperature of the tobacco leaves is controlled between 60 DEG C and 80 DEG C, the temperature rate is 0.5-5 DEG C/(1-2) hours, and the relative humidity range is between 30%-15%. The curing method is in favor of giving play to the special aroma quality of the tobacco leaves, the objectionable constituents in the tobacco leaves is reduced by using the curing method, and the processing cost is low.
Description
Technical field
The invention belongs to tobacco leaf modulation technique field.
Background technology
Cigarette industry has the burnt measure of much effectively falling, and comprises that lengthening filter tip, increase cigarette prop up flammability, punching or the like.But itself do not have selectivity owing to fall Jiao, reduced sucking quality, particularly aroma quality when promptly falling Jiao yet.And the process of tobacco modulation is the process that appears and bring into play the distinctive aroma quality of tobacco leaf; It simultaneously also is the significant process of lowering harm and decreasing coking from the source; How can effectively appear and bring into play the distinctive aroma quality of tobacco leaf; Can modulate the formation that link reduces the harmful components the tobacco leaf from raw material again, significant undoubtedly.
At present, all concentrate on the N-TSNAs aspect about tobacco modulation harm reduction technical research major part, and obtain many progress.According to pertinent literature; N-TSNAs is a series of carcinogens that formed as precursor substance by nitrite and nicotiana alkaloids; Mainly comprise: N-nitroso nornicotine (NNN); 4-(nitroso methyl nitrogen)-1-(3-pyridine radicals)-1-butanone (NNK), N-nitroso anabasine (NAB) and N-nitroso anatabine (NAT).Analysis shows, does not contain or seldom contain tobacco-specific nitrosamine in the tobacco leaf after maturation is gathered, and the formation of tobacco-specific nitrosamine and accumulation mainly occur in modulated process.In the tobacco leaf modulated process, along with scattering and disappearing of moisture content in leaves and eucaryotic cell structure are destroyed, the passing through property of film increases rapidly, and intracellular matter exosmoses, and effective accumulation of N-TSNAs and nitrite also increases synchronously.That therefore can affirm says: bake process is the main period that N-TSNAs forms, and therefore selects suitable modulation system for use, and the reaction condition in the control modulated process is very important to reducing N-TSNAs content.
In traditional naked light modulated process, burning gases directly get into barn, the NO in the combustion by-product
xGenerate N-TSNAs with the natural biological tobacco alkali reaction that is present in the tobacco leaf.And people such as Peel research shows: adopt the heat exchanger baking, then can significantly reduce N-TSNAs.The barn major part that China's baking is at present taked still belongs to old-fashioned traditional flue-curing barn, and structure is not too reasonable, and cooking performance is not satisfactory.It is little mainly to show as the barn capacity, the barn insufficient height, and end canopy height is low, and canopy is apart from little; This type barn belongs to gravity-flow ventilation air-flow ascending manner barn mostly, and ventilation dewetting speed is relatively slow, runs into rainy season especially; Air humidity is big, and hydrofuge is difficulty comparatively, does not cause the tobacco leaf surface color and luster vivid and influence quality easily; For fungi and bacterium provide desirable growth and breeding condition, these microorganisms will breed in a large number and cause rotting of tobacco leaf simultaneously, and cause tobacco leaf N-TSNAs quantity to increase.The new in recent years intensive baking room that adopts is taked the forced ventilation hot air circulation, and is furnished with the humiture robot control system(RCS), can reduce the formation of N-TSNAs to a certain extent, but effect is still undesirable.
Except that roasting plant and technology are carried out in modulated process, introducing physics, chemistry and biotechnology lowering harm and decreasing coking and also having obtained in recent years paying close attention in large quantities and studying certain improvement research.As reducing N-TSNAs through spraying chemicals, in modulated process, add some can with the catabolite NO and the NO of nitrite
xThe material of reaction, thus NO and N reduced
2The possibility of O and nicotiana alkaloids generation nitrosation reaction is with the formation that reduces N-TSNAs etc.But adding this type of material can not produce harmful effect to tabacco fragrance and then have no way of learning.The bacterium of in addition, taking microwave mode and interpolation microorganism mode to kill decapacitation and alkaloid reaction generation N-TSNAs also is a kind of effective way.U.S. Star Scientific Inc. company is in the modulated process of flue-cured tobacco; Through a kind of particular processing; Cause the most of bacterial death that produces nitrosamine, remaining a part of bacterium then kills through large-scale micro-wave oven, thereby prevents or reduce the formation of tobacco product N-TSNAs.But its complex process is high to equipment requirements, and the modulation cost is too high.
Summary of the invention
The objective of the invention is to solve the deficiency that prior art exists; Provide a kind of through changing the process technique ambient medium atmosphere; Control suits in modulated process simultaneously temperature, humidity, heating rate and processing time; Help bringing into play the distinctive aroma quality of tobacco leaf, and can modulate link from raw material and reduce the low cured tobacco leaf raw material modulator approach of harmful components, processing cost the tobacco leaf.
The objective of the invention is to realize through following technical scheme.
A kind of modulator approach of cured tobacco leaf raw material is when flue-cured tobacco raw material entering barn toasts modulation, regulates surrounding medium atmosphere in the barn, introduces pure O
2Perhaps introduce air, O
2, N
2, water vapour, CO
2In two or more mist; In the mist, air content is no more than 33%, O
2Content is no more than 80%, N
2Content is no more than 31%, vapour content is no more than 67%, CO
2Content is no more than 75%; The process conditions of handling raw tobacco material are: at the tobacco leaf changing yellow stage, the tobacco leaf temperature is raised to 42～45 ℃ gradually from normal temperature, and the relative humidity scope is 95%～70%; At the tobacco leaf fixation stage, the temperature when the tobacco leaf temperature is finished by flavescence is raised to 55 ℃～57 ℃ gradually, and heating rate is 0.3～2 ℃/h, and the relative humidity scope is 80%～30%; At the tobacco leaf drying muscle stage, control tobacco leaf temperature range is 60 ℃～80 ℃, and heating rate is 0.2～5 ℃/1～2h, and the relative humidity scope is 30%～15%.
Adopt the inventive method, the tobacco flue-curing time is 7d～15d.
The generation N-TSNAs thereby the microorganism in the tobacco is prone to reduce nitrate in the environment of acidity, low temperature, high humidity; Therefore control temperature, humidity and heating rate, the stoving time in the bake process and introduce one type of active gases medium and make the microorganism in the flue-cured tobacco raw material in optimal baking condition, consume this type of active gases medium and not decompose the nitrate in the raw material, thus minimizing N-TSNAs; In addition, the introducing of this type of active gases medium also can be saved the aroma quality of its flue-cured tobacco raw material own from damage and obtained better cured tobacco leaf color.At the tobacco leaf changing yellow stage, because water deficit to a certain degree takes place, the increased activity of hydrolase in the cell, carbohydrate (mainly being starch), protein are broken down into some chemical compositions favourable to quality such as reduced sugar and solubility nitrogen-containing compound.Overwhelming majority chlorophyll decomposes disappearance; Then only some is destroyed for carotenoid and lutein, is no longer covered by chlorophyllous green because of its color to appear foresythia.The catabolite of carotenoid comprises tens of kinds of cyclocitrals etc., though content is little in the tobacco, the fragrance of tobacco leaf is played an important role.
The present invention compared with prior art has the following advantages:
introduces one type of active gases medium under specific process conditions control; Thereby make this type of active gases medium of microbial consumption in the flue-cured tobacco raw material not decompose the nitrate in the raw material; Reduce generating the N-TSNAs probability, reduce the harm of cigarette product the smoker.
The tobacco material that
adopts this method to handle; Modulation back tobacco leaf color is better, and aspects such as its fragrance matter, perfume quantity are compared with the conventional modulated method and are improved significantly.
The specific embodiment
Through specific embodiment given below, can further be well understood to the present invention, but they not to qualification of the present invention.
A kind of modulator approach of cured tobacco leaf raw material is when flue-cured tobacco raw material entering barn toasts modulation, regulates surrounding medium atmosphere in the barn, introduces pure O
2Perhaps introduce air, O
2, N
2, water vapour, CO
2In two or more mist; In the mist, air content is no more than 33%, O
2Content is no more than 80%, N
2Content is no more than 31%, vapour content is no more than 67%, CO
2Content is no more than 75%; The process conditions of handling raw tobacco material are: at the tobacco leaf changing yellow stage, the tobacco leaf temperature is raised to 42～45 ℃ gradually from normal temperature, and the relative humidity scope is 95%～70%; At the tobacco leaf fixation stage, the temperature when the tobacco leaf temperature is finished by flavescence is raised to 55 ℃～57 ℃ gradually, and heating rate is 0.3～2 ℃/h, and the relative humidity scope is 80%～30%; At the tobacco leaf drying muscle stage, control tobacco leaf temperature range is 60 ℃～80 ℃, and heating rate is 0.2～5 ℃/1～2h, and the relative humidity scope is 30%～15%.
The tobacco flue-curing time is controlled at 7d～15d, and wherein each section reaction time looks the situation of change of tobacco leaf color and moisture and decides.
Embodiment one
Choose the big gold dollar tobacco leaf of safflower of Yunnan real estate, control samples is consistent with the selected tobacco leaf of test appearance of the inventive method, compiles cigarette and also is consistent with dress cigarette mode, puts into barn and toasts.
Control samples 1: changing yellow stage is for beginning the baking back to 96 h, and wherein preceding 45 h heating rates are 0.1 ℃/h, rise to 36 ℃; Heating rate changes 0.15 ℃/h into behind the 36h, rises to 42 ℃, and the heating rate with 0.5 ℃/h behind 93 h rises to 44 ℃, and the relative humidity scope is 82%; Get into fixation stage, the fixation stage time is 48 h, and heating rate is 0.3 ℃/h, rises to 56 ℃, and the relative humidity scope is 50%, gets into drying muscle stage and continues to rise to 68 ℃ until the baking end with 0.5 ℃/h, and the relative humidity scope is 24%.
The test appearance 1 of the inventive method: begin to close the hydrofuge window before the baking, in barn, feed nitrogen (N
2) and oxygen (O
2), and control nitrogen (N
2): oxygen (O
2) (volume ratio) be 1:4, treats to begin baking after dielectric gas is full of whole barn, changing yellow stage is for beginning baking afterwards to 96 h, and wherein preceding 45 h heating rates are 0.1 ℃/h, rise to 36 ℃; Heating rate changes 0.15 ℃/h into behind the 36h, rises to 42 ℃, and the heating rate with 0.5 ℃/h behind 93 h rises to 44 ℃, and the relative humidity scope is 82%; Treat to introduce nitrogen (N once more after hydrofuge begins
2) and oxygen (O
2), getting into fixation stage, fixation stage is 48 h, and heating rate is 0.3 ℃/h, rises to 56 ℃, and the relative humidity scope is 50%, gets into drying muscle stage and continues to rise to 68 ℃ until the baking end with 0.5 ℃/h, and the relative humidity scope is 24%.
Table 1 control samples and the inventive method test appearance TSNA measure result's contrast
| Test name | NNN/μg/g | NNK/μg/g | NAB/μg/g | NAT/μg/g | TSNA/μg/g |
| Control samples 1 | 1.546 | 0.195 | 0.002 | 1.163 | 2.906 |
| Test appearance 1 | 0.471 | 0.085 | 0.001 | 0.432 | 0.989 |
Table 2 conventional ingredient content detection is statistical form as a result
| The sample title | Total nicotine/% | Total reducing sugar/% | Chlorinity/% | Total nitrogen/% | Reduced sugar/% | Potassium content/% |
| Control samples 1 | 7.37 | 11.4 | 0.75 | / | 8.22 | 1.46 |
| Test appearance 1 | 7.51 | 15.0 | 0.71 | / | 11.0 | 1.39 |
The contrast of table 3 different modulation tobacco leaf presentation quality
| The sample title | Color | Maturity | Oil content | Colourity | Structure | The overall evaluation |
| Control samples 1 | Orange | Ripe | Have | By force | Loose | Good |
| Test appearance 1 | Crocus | Ripe | Many | By force | Loose | Good+ |
To test appearance and control samples uniform sampling chopping, put into temperature and be 22 ℃, humidity and be 60% climatic chamber balance 48 hours, and carry out the sensory evaluating smoking, the effect of smokeing panel test of test kind obviously is better than control samples.
Embodiment two
Choose the big gold dollar tobacco leaf of safflower of Yunnan real estate, control samples is consistent with the selected tobacco leaf of test appearance of the inventive method, compiles cigarette and also is consistent with dress cigarette mode, puts into barn and toasts.
Control samples 2: identical with control samples 1 modulator approach.
The test appearance 2 of the inventive method: begin to close the hydrofuge window before the baking, feed nitrogen (N
2) and carbon dioxide (CO
2), and control N
2And CO
2Volume ratio is 1:3, treat that dielectric gas is full of whole barn after, toast by testing appearance 1 an identical baking process with the present invention, treat to introduce once more after hydrofuge begins this active gases medium atmosphere and finish until baking.
Table 4 control samples and the inventive method test appearance TSNA measure result's contrast
| Test name | NNN/μg/g | NNK/μg/g | NAB/μg/g | NAT/μg/g | TSNA/μg/g |
| Control samples 2 | 1.546 | 0.195 | 0.002 | 1.163 | 2.906 |
| Test appearance 2 | 0.874 | 0.105 | 0.002 | 0.763 | 1.744 |
Table 5 conventional ingredient content detection is statistical form as a result
| The sample title | Total nicotine/% | Total reducing sugar/% | Chlorinity/% | Total nitrogen/% | Reduced sugar/% | Potassium content/% |
| Control samples 2 | 7.37 | 11.4 | 0.75 | / | 8.22 | 1.46 |
| Test appearance 2 | 7.41 | 14.2 | 0.81 | / | 9.08 | 1.46 |
The contrast of table 6 different modulation tobacco leaf presentation quality
| The sample title | Color | Maturity | Oil content | Colourity | Structure | The overall evaluation |
| Control samples 2 | Orange | Ripe | Have | By force | Loose | Good |
| Test appearance 2 | Crocus | Ripe | Many | By force | Loose | Good+ |
To test appearance and control samples uniform sampling chopping, put into temperature and be 22 ℃, humidity and be 60% climatic chamber balance 48 hours, and carry out the sensory evaluating smoking, the result is that the effect of smokeing panel test of test kind obviously is better than control samples.
Embodiment three
Choose cloud and mist 85 tobacco leaves of Yunnan real estate, control samples is consistent with the selected tobacco leaf of test appearance of the inventive method, compiles cigarette and also is consistent with dress cigarette mode, puts into barn and toasts.
Control samples 3: changing yellow stage is for beginning the baking back to 60h, and wherein preceding 12h heating rate is 0.2 ℃/h, rises to 27.5 ℃; Heating rate changes 0.22 ℃/h into behind the 12h, rises to 38 ℃, and the heating rate with 0.33 ℃/h behind 60 h rises to 45 ℃; The relative humidity scope is 70% entering fixation stage, and fixation stage is 24h, and heating rate is 0.63 ℃/h; Rise to 57 ℃, the relative humidity scope is 60%, gets into drying muscle stage and continues to rise to 69 ℃ with 0.5 ℃/h; The relative humidity scope is 15%, finishes until baking.
The test appearance 3 of the inventive method: begin to close the hydrofuge window before the baking, feed nitrogen (N
2), carbon dioxide (CO
2), oxygen (O
2), and to control its volume ratio be N
2: CO
2: O
2=1:1:3 treats to begin baking after dielectric gas is full of whole barn, and changing yellow stage is for beginning the baking back to 60h, and wherein preceding 12h heating rate is 0.2 ℃/h, rises to 27.5 ℃; Heating rate changes 0.22 ℃/h into behind the 12h, rises to 38 ℃, and the heating rate with 0.33 ℃/h behind 60 h rises to 45 ℃, introduces nitrogen (N after hydrofuge begins once more
2), carbon dioxide (CO
2), oxygen (O
2), getting into fixation stage, fixation stage is 24h, heating rate is 0.63 ℃/h, rises to 57 ℃, gets into drying muscle stage and continues to rise to 69 ℃ until the baking end with 0.5 ℃/h.
Table 7 control samples and the inventive method test appearance TSNA measure result's contrast
| Test name | NNN/μg/g | NNK/μg/g | NAB/μg/g | NAT/μg/g | TSNA/μg/g |
| Control samples 3 | 0.978. | 0.104 | 0.001 | 1.383 | 2.466 |
| Test appearance 3 | 0.359 | 0.115 | 0.001 | 0.412 | 0.887 |
Table 8 conventional ingredient content detection is statistical form as a result
| The sample title | Total nicotine/% | Total reducing sugar/% | Chlorinity/% | Total nitrogen/% | Reduced sugar/% | Potassium content/% |
| Control samples 3 | 8.67 | 13.4 | 0.99 | / | 11.34 | 1.89 |
| Test appearance 3 | 8.71 | 13.9 | 0.92 | / | 12.03 | 1.88 |
The contrast of table 9 different modulation tobacco leaf presentation quality
| The sample title | Color | Maturity | Oil content | Colourity | Structure | The overall evaluation |
| Control samples 3 | Crocus | Ripe | Have | Stronger | Loose | Good |
| Test appearance 3 | Crocus | Ripe | Have+ | By force | Loose | Good+ |
To test appearance and control samples uniform sampling chopping, put into temperature and be 22 ℃, humidity and be 60% climatic chamber balance 48 hours, and carry out the sensory evaluating smoking, the result also is that the effect of smokeing panel test of test kind obviously is better than control samples.
Embodiment four
Choose cloud and mist 85 tobacco leaves of Yunnan real estate, control samples is consistent with the selected tobacco leaf of test appearance of the inventive method, compiles cigarette and also is consistent with dress cigarette mode, puts into barn and toasts.
Control samples 4: with control samples 3 identical modulation process.
The test appearance 4 of the inventive method: begin to close the hydrofuge window before the baking, feed purity oxygen (O
2), treat that dielectric gas is full of whole barn after, toast by the baking process identical with control samples, treat that hydrofuge begins the back and gets into fixation stage and introduce pure N once more
2The medium atmosphere finishes until baking.The baking temperature in each period and humidity range are with test appearance 3.
Table 10 control samples and the inventive method test appearance TSNA measure result's contrast
| Test name | NNN/μg/g | NNK/μg/g | NAB/μg/g | NAT/μg/g | TSNA/μg/g |
| Control samples 4 | 0.978. | 0.104 | 0.001 | 1.383 | 2.466 |
| Test appearance 4 | 0.201 | 0.055 | 0.001 | 0.212 | 0.469 |
Table 11 conventional ingredient content detection is statistical form as a result
| The sample title | Total nicotine/% | Total reducing sugar/% | Chlorinity/% | Total nitrogen/% | Reduced sugar/% | Potassium content/% |
| Control samples 4 | 8.67 | 13.4 | 0.99 | / | 11.34 | 1.89 |
| Test appearance 4 | 8.56 | 14.2 | 0.62 | / | 13.11 | 1.76 |
The contrast of table 12 different modulation tobacco leaf presentation quality
| The sample title | Color | Maturity | Oil content | Colourity | Structure | The overall evaluation |
| Control samples 4 | Crocus | Ripe | Have | Stronger | Loose | Good |
| Test appearance 4 | Crocus | Ripe | Good | By force | Loose | Good+ |
To test appearance and control samples uniform sampling chopping, put into temperature and be 22 ℃, humidity and be 60% climatic chamber balance 48 hours, and carry out the sensory evaluating smoking, the result is that the effect of smokeing panel test of test kind obviously is better than control samples.
Embodiment five
Choose cloud and mist 85 tobacco leaves of Yunnan real estate, control samples is consistent with the selected tobacco leaf of test appearance of the inventive method, compiles cigarette and also is consistent with dress cigarette mode, puts into barn and toasts.
Control samples 5: changing yellow stage is for beginning the baking back to 80h, and wherein preceding 12h heating rate is 0.2 ℃/h, rises to 27.5 ℃; Heating rate changes 0.22 ℃/h into behind the 12h, rises to 38 ℃, and the heating rate with 0.33 ℃/h behind 80 h rises to 45 ℃; The relative humidity scope is 90% entering fixation stage, and fixation stage is 72h, and heating rate is 0.63 ℃/h; Rise to 57 ℃, the relative humidity scope is 80%, gets into drying muscle stage and continues to rise to 69 ℃ with 0.5 ℃/h; The relative humidity scope is 30%, finishes until baking.
The test appearance 5 of the inventive method: begin to close the hydrofuge window before the baking; Bubbling air and water vapour; And to control its volume ratio be air: water vapour=1:2, treats to begin baking after dielectric gas is full of whole barn, and changing yellow stage is for beginning baking afterwards to 80h; Wherein preceding 12h heating rate is 0.2 ℃/h, rises to 27.5 ℃; Heating rate changes 0.22 ℃/h into behind the 12h, rises to 38 ℃, and the heating rate with 0.33 ℃/h behind 80 h rises to 45 ℃; The relative humidity scope is 95%, introduces air and water vapour after hydrofuge begins once more, gets into fixation stage; Fixation stage is 72h, and heating rate is 0.63 ℃/h, rises to 57 ℃; The relative humidity scope is 80%, gets into drying muscle stage and continues to rise to 69 ℃ until the baking end with 0.5 ℃/h.The relative humidity scope is 30%,
Table 13 control samples and the inventive method test appearance TSNA measure result's contrast
| Test name | NNN/μg/g | NNK/μg/g | NAB/μg/g | NAT/μg/g | TSNA/μg/g |
| Control samples 5 | 0.978 | 0.104 | 0.001 | 1.383 | 2.466 |
| Test appearance 5 | 0.652 | 0.100 | 0.001 | 0.872 | 1.625 |
Table 14 conventional ingredient content detection is statistical form as a result
| The sample title | Total nicotine/% | Total reducing sugar/% | Chlorinity/% | Total nitrogen/% | Reduced sugar/% | Potassium content/% |
| Control samples 5 | 8.67 | 13.4 | 0.99 | / | 11.34 | 1.89 |
| Test appearance 5 | 8.55 | 12.9 | 1.07 | / | 11.68 | 1.74 |
The contrast of table 15 different modulation tobacco leaf presentation quality
| The sample title | Color | Maturity | Oil content | Colourity | Structure | The overall evaluation |
| Control samples 5 | Crocus | Ripe | Have | Stronger | Loose | Good |
| Test appearance 5 | Crocus | Ripe | Have+ | Stronger | Loose | Good+ |
To test appearance and control samples uniform sampling chopping, put into temperature and be 22 ℃, humidity and be 60% climatic chamber balance 48 hours, and carry out the sensory evaluating smoking, the result also is that the effect of smokeing panel test of test kind slightly is better than control samples.
Embodiment six
Choose the big gold dollar tobacco leaf of safflower of Yunnan real estate, control samples is consistent with the selected tobacco leaf of test appearance of the inventive method, compiles cigarette and also is consistent with dress cigarette mode, puts into barn and toasts.
Control samples 6: changing yellow stage is for beginning the baking back to 120h, and wherein preceding 80h heating rate is 0.01 ℃/h, rises to 40 ℃; Heating rate changes 0.2 ℃/h into behind the 80h, rises to 42 ℃, rises to 44 ℃ and keep this temperature to 120h with the heating rate of 0.5 ℃/h behind the 90h, and the relative humidity scope is 70%; Get into fixation stage, the fixation stage time is 100 h, and heating rate is 1 ℃/h; Keep this temperature to 220h after rising to 55 ℃; The relative humidity scope is 40%, gets into drying muscle stage and continues to rise to 80 ℃ of baking end behind 320h with 0.05 ℃/h, and the relative humidity scope is 15%.
The test appearance 6 of the inventive method: begin to close the hydrofuge window, bubbling air, nitrogen (N in barn before the baking
2), oxygen (O
2), carbon dioxide (CO
2), the water vapor mixture body, and control air, nitrogen (N
2), oxygen (O
2), carbon dioxide (CO
2), water vapour (volume ratio) is 1:2:2:1:0.5, treats to begin baking after dielectric gas is full of whole barn, changing yellow stage is for beginning the baking back to 120h, wherein preceding 80h heating rate is 0.01 ℃/h, rises to 40 ℃; Heating rate changes 0.2 ℃/h into behind the 80h, rises to 42 ℃, rises to 44 ℃ and keep this temperature to 120h with the heating rate of 0.5 ℃/h behind the 90h, and the relative humidity scope is 70%; After beginning, introduces hydrofuge this mist atmosphere once more; Get into fixation stage, the fixation stage time is 100 h, and heating rate is 1 ℃/h; Keep this temperature to 220h after rising to 55 ℃; The relative humidity scope is 30%, gets into drying muscle stage and continues to rise to 80 ℃ of baking end behind 320h with 0.05 ℃/h, and the relative humidity scope is 15%.
Table 16 control samples and the inventive method test appearance TSNA measure result's contrast
| Test name | NNN/μg/g | NNK/μg/g | NAB/μg/g | NAT/μg/g | TSNA/μg/g |
| Control samples 6 | 1.298 | 0.204 | 0.002 | 1.793 | 3.297 |
| Test appearance 6 | 0.992 | 0.310 | 0.001 | 1.082 | 2.385 |
Table 17 conventional ingredient content detection is statistical form as a result
| The sample title | Total nicotine/% | Total reducing sugar/% | Chlorinity/% | Total nitrogen/% | Reduced sugar/% | Potassium content/% |
| Control samples 6 | 7.67 | 22.1 | 0.99 | / | 7.74 | 1.39 |
| Test appearance 6 | 7.55 | 19.9 | 0.97 | / | 8.98 | 1.74 |
The contrast of table 18 different modulation tobacco leaf presentation quality
| The sample title | Color | Maturity | Oil content | Colourity | Structure | The overall evaluation |
| Control samples 6 | Yellow | Ripe | Generally | Stronger | Loose | Good |
| Test appearance 6 | Yellow | Ripe | Have | By force | Loose | Good |
To test appearance and control samples uniform sampling chopping, put into temperature and be 22 ℃, humidity and be 60% climatic chamber balance 48 hours, and carry out the sensory evaluating smoking, the result also is that the effect of smokeing panel test of test kind slightly is better than control samples.
Claims (2)
1. the modulator approach of a cured tobacco leaf raw material is characterized in that, when flue-cured tobacco raw material entering barn toasts modulation, regulates surrounding medium atmosphere in the barn, introduces pure O
2Perhaps introduce air, O
2, N
2, water vapour, CO
2In two or more mist; In the mist, air content is no more than 33%, O
2Content is no more than 80%, N
2Content is no more than 31%, vapour content is no more than 67%, CO
2Content is no more than 75%; The process conditions of handling raw tobacco material are: at the tobacco leaf changing yellow stage, the tobacco leaf temperature is raised to 42～45 ℃ gradually from normal temperature, and the relative humidity scope is 95%～70%; At the tobacco leaf fixation stage, the temperature when the tobacco leaf temperature is finished by flavescence is raised to 55 ℃～57 ℃ gradually, and heating rate is 0.3～2 ℃/h, and the relative humidity scope is 80%～30%; At the tobacco leaf drying muscle stage, control tobacco leaf temperature range is 60 ℃～80 ℃, and heating rate is 0.2～5 ℃/1～2h, and the relative humidity scope is 30%～15%.
2. the modulator approach of a kind of cured tobacco leaf raw material according to claim 1 is characterized in that, the tobacco flue-curing time is 7d～15d.
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| CN104055213B (en) * | 2014-06-26 | 2015-07-22 | 云南省烟草公司大理州公司 | Baking method for reducing chilling damage loss of HD (Honghua Dajinyuan) tobacco leaves in high-altitude areas |
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| CN108552576B (en) * | 2018-05-30 | 2022-02-15 | 滁州卷烟材料厂 | Tobacco leaf modulation method |
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| CN113951542B (en) * | 2021-11-05 | 2023-03-17 | 云南中烟工业有限责任公司 | Storage method for inhibiting increase of TSNAs content in buccal tobacco leaves |
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