CN112890266B - Method for winnowing and quality improvement of threshing and redrying on-line tobacco slices - Google Patents
Method for winnowing and quality improvement of threshing and redrying on-line tobacco slices Download PDFInfo
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- CN112890266B CN112890266B CN202110378863.2A CN202110378863A CN112890266B CN 112890266 B CN112890266 B CN 112890266B CN 202110378863 A CN202110378863 A CN 202110378863A CN 112890266 B CN112890266 B CN 112890266B
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/04—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials
- B65G69/045—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials with scraping devices
Abstract
The invention discloses a threshing and redrying online tobacco slice winnowing quality improvement method, which comprises the following steps: carrying out flow distribution and flat spreading treatment on the tobacco flakes subjected to threshing and air separation; carrying out wind separation on the tiled tobacco flakes to ensure that the tobacco flakes are regularly distributed in a blanking area according to the weight of the tobacco flakes; and (3) dividing the blanking area of the tobacco flakes according to the change relation between the physical characteristics of the quality weight of the tobacco flakes and the quality of the tobacco leaves, so as to classify the tobacco flakes according to the quality. The invention separates the tobacco flakes with different leaf weights, namely realizes the separation of the tobacco leaves with different qualities, and achieves the purpose of classifying the tobacco flakes; and equipment investment is not required to be increased, the original process flow is not changed, the overall quality structure of the tobacco leaves can be improved, and the quality of the high-end module tobacco strips is improved.
Description
Technical Field
The invention relates to the technical field of threshing and redrying quality improvement, in particular to an online quality improvement method for tobacco lamina winnowing.
Background
The physical properties of the tobacco leaves comprise the external form and the physical properties of the tobacco leaves, are important indexes for reflecting the quality and the processing performance of the tobacco leaves, and directly influence the quality of the tobacco leaves and the product style, quality and economic indexes in the cigarette manufacturing process; in addition, the correlation degree of the physical property indexes such as the leaf thickness, the balance moisture content, the leaf mass weight, the leaf density, the leaf stalk content and the like of the tobacco leaves and the quality of the tobacco leaves is represented as follows: the association degree of the tobacco leaf weight and the tobacco leaf oil content is the largest, the single leaf weight is the second, and the relationship between the tobacco leaf oil content and the tobacco leaf weight is the closest.
The formula module of high-end raw materials is very important for distinguishing the brand style of cigarettes, is basically formed by combining and processing single grade or similar production areas at the same grade, and is characterized by high quality and high purity. In order to ensure the quality of cigarette raw materials of high-end brands, cigarette enterprises adopt various quality control measures, and particularly in the raw material preparation stage, a large amount of manpower and material resources are input to carry out tobacco leaf selection so as to realize the improvement and the stability of the quality of finished product modules. However, in actual production, the quality consistency of tobacco leaves of each grade cannot be realized, even if the quality consistency of the tobacco leaves is improved through manual leaf selection, the quality consistency of the tobacco leaves cannot reach a more ideal state, and the quality consistency is mainly limited by the following factors: firstly, leaf selection workers have different skill levels and responsibility centers and cannot ensure the consistency of the quality after selection; secondly, each tobacco leaf has different quality, the quality of the same tobacco leaf is different at different positions, the tobacco leaves are divided according to the quality factor of the flue-cured tobacco, the quality of the same tobacco leaf is different at different positions, especially the quality of the base part of the tobacco leaf is obviously low, and the part of the tobacco leaves enter the finished tobacco leaves along with leaf selection.
Therefore, a method for classifying the quality of the threshing and redrying online tobacco strips and eliminating the category with relatively low quality is needed, so as to improve the quality of the tobacco strips.
Disclosure of Invention
The invention aims to provide a threshing and redrying online tobacco sheet winnowing quality-improving method, which aims to solve the problems in the prior art and can realize winnowing through the physical characteristics of tobacco leaves so as to achieve the aim of separating tobacco sheets with different qualities.
The invention provides an online tobacco lamina winnowing quality improvement method, which comprises the following steps:
carrying out flow distribution and flat spreading treatment on the tobacco sheets subjected to threshing and air separation;
carrying out air separation treatment on the tiled tobacco flakes to ensure that the tobacco flakes are regularly distributed in a blanking area according to the weight of tobacco leaves;
and according to the change relation between the leaf mass weight and the tobacco leaf mass of the tobacco strips subjected to threshing and air separation, dividing the blanking area of the tobacco strips to realize mass classification.
The method for improving the quality of the sheet tobacco by winnowing on line preferably includes the following steps:
inputting the tobacco flakes output from the collecting discharge port of the threshing and air separating device to 2-3 horizontal conveying belts for separating.
The method for improving the quality of the sheet tobacco by winnowing on line preferably comprises the following steps of:
and the flat spreading scraper arranged above the horizontal conveyor belt is used for carrying out flat spreading and thinning treatment on the tobacco flakes conveyed on the horizontal conveyor belt.
The method for upgrading the lamina air separation as described above, wherein preferably, the speed of the horizontal conveyor is 2m/s-3m/s for further spreading the lamina on the horizontal conveyor.
The online method for improving the quality of the tobacco sheet by winnowing as described above, wherein preferably, the air separation treatment is performed on the tobacco sheet after the flat spreading treatment, so that the tobacco sheet is regularly distributed in a blanking area according to the weight of the tobacco sheet, specifically comprising:
and blowing the sheet tobacco on the horizontal conveying belt by using a fan, wherein the width of a blowing opening of the fan is matched with the width of the sheet tobacco at the tail end of the horizontal conveying belt.
The method for improving quality of the sheet tobacco by winnowing on the online sheet tobacco, preferably, the method for improving quality of the sheet tobacco by winnowing includes the following steps:
the blanking area of the tobacco flakes is provided with a blanking belt, and the blanking belt is provided with a plurality of baffles so as to divide the tobacco flakes in different blanking intervals.
The method for improving the quality of the sheet tobacco by winnowing on the online sheet tobacco comprises the following steps of preferably arranging a blanking belt in a blanking area of the sheet tobacco, and arranging a plurality of baffles on the blanking belt so as to divide the sheet tobacco in different blanking intervals, wherein the method specifically comprises the following steps:
combining a plurality of blanking sections adjacent to each other on the blanking belt into a blanking interval to obtain a thick leaf area, a middle leaf area and a thin leaf area which are sequentially arranged, wherein the width of the blanking belt is 2m-3m;
sampling the tobacco sheets in the thick leaf area, the middle leaf area and the thin leaf area in different areas to obtain samples corresponding to the three blanking areas;
respectively measuring physical indexes of samples corresponding to the three blanking intervals, wherein the physical indexes at least comprise the weight of the leaf;
respectively carrying out sensory evaluation on the samples corresponding to the three blanking intervals to obtain sensory quality;
establishing an association relationship between the physical characteristics and the sensory quality;
and determining the setting positions of the two baffles according to the incidence relation between the physical characteristics and the sensory quality so as to determine the division limit of the three blanking intervals.
The above method for improving quality of sheet tobacco by winnowing on line preferably includes the steps of arranging a blanking belt in a blanking area of the sheet tobacco, and arranging a plurality of baffles on the blanking belt to divide the sheet tobacco in different blanking intervals, and further including:
the method comprises the following steps of conveying the tobacco flakes in the thick leaf area by using a thick leaf conveying belt, conveying the tobacco flakes in the middle leaf area by using a middle leaf conveying belt, and conveying the tobacco flakes in the thin leaf area by using a thin leaf conveying belt.
The online tobacco lamina winnowing quality improvement method preferably includes the following steps:
randomly drawing 10 pieces of tobacco, measuring the thickness of the tobacco by using an electric thickness meter, and taking the average value of the thicknesses of 20 points as the thickness (mum) of the sample;
randomly drawing 10 pieces of tobacco, punching 5 pieces of round small pieces with diameter (D) of 10mm with a round puncher, placing 30 pieces of round small pieces into a moisture box, drying at 100 deg.C for 2 hr, cooling, weighing, and making into cigaretteCalculating the weight of the leaf mass: leaf mass weight (g/m) 2 ) = (weight after baking-weight of moisture box)/[ 30 π (D/2) 2 ]Obtaining the density of the tobacco leaves (mg-cm) according to the ratio of the weight to the volume of the tobacco leaves -3 )；
Randomly drawing 10 tobacco flakes, cutting the tobacco flakes into small pieces with the width not more than 5mm, balancing the small pieces for 24 to 48 hours under the standard air condition (the temperature is 22 ℃ plus or minus 1 ℃ and the relative humidity is 60 percent plus or minus 3 percent), uniformly mixing the small pieces, weighing 5g of a sample by using a sample box with known dry weight, weighing the weighed sample, removing a cover, putting the sample into an oven with the temperature of 100 ℃ plus or minus 2 ℃, drying the sample for 2 hours when the temperature rises back to 100 ℃, taking the sample out, putting the sample into a dryer, cooling the sample to room temperature, and weighing the sample again to obtain the balanced water content (%).
The invention provides an online tobacco lamina winnowing quality-improving method, which separates tobacco lamina with different leaf weights, namely realizes the separation of tobacco leaves with different qualities and achieves the purpose of tobacco lamina quality classification; and equipment investment is not required to be increased, the original process flow is not changed, the tobacco sheet sorting efficiency can reach 80 percent, the integral quality structure of tobacco leaves can be improved, and the quality of high-end module tobacco sheets is improved.
Drawings
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 flow chart of an embodiment of an on-line tobacco lamina air classification upgrading method provided by the invention;
fig. 2 is a schematic structural diagram of an embodiment of the online tobacco lamina winnowing quality-improving device provided by the invention.
Description of reference numerals:
1-incoming sheet tobacco shunting and spreading unit 2-air supply unit 3-winnowing separation unit
11-discharging vibration groove 31-thick leaf area 32-middle leaf area
33-thin leaf area 34-baffle 36-thick leaf conveyer belt
37-middle leaf conveyer belt 38-thin leaf conveyer belt
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
"first", "second" used in the present disclosure: and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationship may also be changed accordingly.
In the present disclosure, when a specific component is described as being positioned between a first component and a second component, there may or may not be an intervening component between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without having an intervening component, or may be directly connected to the other components without having an intervening component.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
As shown in fig. 1, an embodiment of the present invention provides an online sheet tobacco winnowing and upgrading method, which is implemented based on an online sheet tobacco winnowing and upgrading device, and as shown in fig. 2, the online sheet tobacco winnowing and upgrading device includes an incoming sheet tobacco shunting and tiling unit 1, an air supply unit 2, and an air separation unit 3, wherein one end of the incoming sheet tobacco shunting and tiling unit 1 is connected to a discharge port of a threshing and air separation device, one end of the air supply unit 2 is connected to the incoming sheet tobacco shunting and tiling unit 1, the other end of the air supply unit 2 is connected to the air separation unit 3, and the other end of the air separation unit 3 is connected to a leaf storage cabinet before redrying.
As shown in fig. 1, in the actual implementation process, the online method for improving quality of tobacco lamina by winnowing specifically includes the following steps:
and S1, carrying out flow distribution and tiling treatment on the tobacco flakes subjected to threshing and air separation.
As shown in fig. 2, the incoming sheet tobacco splitting and spreading unit 1 is used for splitting and spreading the tobacco sheets which are subjected to threshing and air separation. Wherein, the incoming sheet tobacco shunting and spreading unit 1 is 2-3 horizontal conveyor belts which are arranged in parallel. Specifically, the tobacco flakes output from the collecting discharge port of the threshing and air separating device are input to 2-3 horizontal conveying belts for separating.
In the specific implementation, firstly, the tobacco flakes output from the discharge port of the threshing and air separating device are input into a discharge vibration groove 11, wherein the width of the discharge vibration groove 11 is consistent with that of the discharge port of the threshing and air separating device; the sheet tobacco output from the vibratory discharge chute 11 is then fed onto a horizontal conveyor belt, wherein the width of the horizontal conveyor belt is greater than the width of the vibratory discharge chute 11, specifically, the width of the horizontal conveyor belt is 2m to 3m, for example, 2.8m, and the width of the vibratory discharge chute 11 is 1.2m. Illustratively, the speed of the horizontal conveyor belt is 2m/s to 3m/s. Compared with the belt speed in the leaf wind dividing and gathering process, the speed of the horizontal conveying belt 12 is increased by 2-3 times, so that the tobacco flakes on the horizontal conveying belt can be further thinned.
Taking a 12000kg production line as an example, in the blade wind dividing and collecting procedure at the front end of the incoming sheet tobacco dividing and spreading unit 1, the material thickness is 10-15cm, the belt width is 1.2m, and the speed is 1.5m/s. The tobacco sheets are distributed thickly on the belt from the threshing air separation assembly line, and the thickness of the tobacco sheets conveyed by the belt is uneven.
Further, in an embodiment of the method for upgrading an online tobacco sheet by winnowing, the step S1 may further include:
and the flat spreading scraper arranged above the horizontal conveyor belt is used for carrying out flat spreading and thinning treatment on the tobacco flakes conveyed on the horizontal conveyor belt.
Force can be applied to the sheet tobacco transported on the horizontal conveyor belt by the laying scraper. The tiling thickness of the tobacco flakes can be further reduced through the tiling scraper blade, and the uniformity of the tobacco flakes is further improved. Therefore, the widened horizontal conveying belt and the flat scraper are adopted, the flat thickness of the tobacco flakes can be ensured to be less than 5cm, the flat thickness of the tobacco flakes is obviously reduced, and the uniformity of the tobacco flakes is improved.
And S2, carrying out air separation treatment on the tiled tobacco flakes to ensure that the tobacco flakes are regularly distributed in a blanking area according to the weight of the tobacco flakes.
As shown in fig. 2, the air supply unit 2 is used to blow the tiled sheet tobacco, in a specific implementation, a fan may be used to blow the sheet tobacco on the horizontal conveyor belt, wherein the width of the air blowing port of the fan is matched with the width of the sheet tobacco at the end of the horizontal conveyor belt.
Specifically, the blowing port of the blower is flat and wide, and blows air towards the end of the incoming sheet tobacco distribution and tiling unit 1 (i.e. the horizontal conveyor belt), so that it can be verified that the sheet tobacco coming out from the discharge port of the sheet tobacco distribution and tiling unit 1 forms a parabolic blanking area in the sorting and separating unit 3 (to be described later). Furthermore, the wind speed of the fan is 4-5 m/s, so that the tobacco leaves can be ensured to be lifted and fly out, and a parabolic blanking area is formed.
And S3, dividing the blanking area of the tobacco flakes according to the change relation between the leaf mass weight and the tobacco leaf mass of the tobacco flakes subjected to threshing and air separation, and realizing mass classification.
As shown in fig. 2, the parabolic blanking area of the sheet tobacco is divided by the winnowing separation unit 3. Specifically, a blanking belt is arranged in a blanking area of the sheet tobacco, and a plurality of baffles 34 are arranged on the blanking belt to divide the sheet tobacco in different blanking intervals. In the specific implementation, tobacco leaves in different parabola blanking intervals are taken for sensory evaluation, and the tobacco pieces with different physical characteristics are divided according to the difference of sensory evaluation results, so that the separation of the tobacco pieces with different qualities is realized.
Further, in an embodiment of the method for upgrading a tobacco sheet by winnowing, the step S3 may specifically include:
and S31, combining a plurality of blanking sections adjacent to each other on the blanking belt into a blanking interval to obtain a thick leaf area 31, a middle leaf area 32 and a thin leaf area 33 which are sequentially arranged, wherein the width of the blanking belt is 2m-3m.
And S32, sampling the tobacco sheets in the thick leaf area 31, the middle leaf area 32 and the thin leaf area 33 in different areas to obtain samples corresponding to three blanking areas.
And S33, respectively measuring physical indexes of the samples corresponding to the three blanking intervals, wherein the physical indexes at least comprise the weight of the leaves.
The physical indexes of the sample include leaf thickness, leaf mass and weight, leaf density and equilibrium water content, and in an embodiment of the online tobacco lamina air separation upgrading method, the step S33 may specifically include:
step S331, randomly extracting 10 pieces of tobacco (the water content is 16.5% + -0.5%), measuring the thickness by using an electric thickness meter, and taking the average value of the thicknesses of 20 points as the thickness (mum) of the sample.
Step S332, randomly drawing 10 pieces of tobacco, punching 5 round small pieces with the diameter (D) of 10mm by using a round puncher, putting 30 round small pieces into a moisture box, drying for 2 hours at 100 ℃, cooling, weighing, and calculating the weight of the tobacco leaves according to a formula: leaf mass weight (g/m) 2 ) = (weight after baking-weight of moisture box)/[ 30 π (D/2) 2 ]Obtaining the density of the tobacco leaves (mg cm) according to the ratio of the weight to the volume of the tobacco leaves -3 )。
S333, randomly drawing 10 tobacco flakes, cutting the tobacco flakes into small pieces with the width not more than 5mm, balancing the small pieces for 24-48 hours under the condition of standard air (the temperature is 22 +/-1 ℃ and the relative humidity is 60% +/-3%), uniformly mixing the small pieces, weighing 5g of the test sample by using a sample box with known dry weight, weighing the weighed test sample, removing a cover, putting the test sample into an oven with the temperature of 100 +/-2 ℃, drying the test sample for 2 hours from the temperature rising to 100 ℃, covering the test sample, taking the test sample out, putting the test sample into a dryer, cooling the test sample to room temperature, and weighing the test sample again to obtain the balanced water content (%).
And S34, respectively carrying out sensory evaluation on the samples corresponding to the three blanking intervals to obtain sensory quality.
The indexes of the sensory quality evaluation comprise aroma quality, aroma quantity, concentration, fineness and softness, aftertaste, miscellaneous gas, irritation and strength;
the total score calculation formula of the sensory quality evaluation is as follows: t = (A + B). Times.2.0 + (C + D). Times.1.5 + E + F + G + H, wherein T is total score of sensory quality evaluation, A is fragrance quality score, B is fragrance amount score, C is concentration score, D is fineness score, E is aftertaste score, F is miscellaneous gas score, G is irritation score, and H is strength score.
And S35, establishing the association relationship between the physical characteristics and the sensory quality.
And S36, determining the setting positions of the two baffles 34 according to the correlation between the physical characteristics and the sensory quality so as to determine the division limit of the three blanking intervals.
Further, in an embodiment of the method for upgrading a tobacco sheet by winnowing, the step S3 further includes:
and step S37, conveying the tobacco flakes in the thick leaf area 31 by using a thick leaf conveying belt 36, conveying the tobacco flakes in the middle leaf area 32 by using a middle leaf conveying belt 37, and conveying the tobacco flakes in the thin leaf area 33 by using a thin leaf conveying belt 38.
Further, the invention verifies the correlation of the corresponding sensory quality and physical characteristics of a plurality of blanking segments through tests. The test was started in 2019 at 10 months, where the tobacco sample was produced in Sanmenxia Lu, henan xuchang, luoyang, shinmushan, heilongjiang peony, grade C3F, year 2019, and the sample list is shown in Table 3. The test site is arranged on a special threshing line of Baofeng redrying factories.
The test method adopted is a sensory evaluation method, wherein the aroma characteristics comprise: quality, volume, fullness, and miscellaneous odor of aroma; flue gas characteristics: concentration, strength, fineness and conglomeration; mouthfeel characteristics include irritation, cleanliness, dryness, sweetness; industrial applicability.
Specifically, a sensory quality evaluation method is adopted for sensory evaluation, 11 professional smoke evaluators evaluate the sensory quality of the smoke sample as shown in tables 1 and 2, each index is evaluated and quantified in a 9-point system, and the smoke evaluation contents are respectively graded according to 10 indexes such as strong flavor display, aroma quality, aroma quantity, concentration, flexibility and fineness, aftertaste, offensive odor, irritation, combustibility and gray.
TABLE 1 sensory evaluation index assignment Standard
TABLE 2 weight coefficients of various sensory indices
Note: the total sensory score is (T) = (A + B) x 2.0+ (C + D) x 1.5+ E + F + G + H.
TABLE 3 tobacco leaf sample List
Sensory quality evaluation results of 3 blanking intervals of the tobacco strips in the 8 tobacco strip sample producing areas are shown in a table 4, and analysis table 4 can find that the sensory quality difference of air separation and sampling is large, wherein the quality of a thin leaf area 33 which flies farthest is worst, the quality of a middle leaf area 32 is highest, and the quality of a thick leaf area 31 is second, so that the tobacco leaf quality is separated through air separation, high-quality tobacco leaf raw materials can be effectively separated, and the separation and purification of the tobacco strips with different qualities are achieved. The leaf thickness and leaf mass weight of 3 blanking segments of the tobacco lamina in 8 tobacco lamina sample production areas are respectively shown in tables 5-6.
TABLE 4 sensory quality evaluation Table
TABLE 5 variation of blade thickness for different air-picking separation zones
Unit: mum of
TABLE 6 variation of leaf mass in different air-sorting separation zones
Unit is g.m -2
It can be seen from tables 4, 5 and 6 that in the implementation process, the parabolic blanking area is divided into 3 blanking segments, the sensory quality and the physical characteristics of the 3 blanking segments are detected, and the leaf thickness and the leaf weight physical index values of different blanking segments are changed into three intervals: a first interval: the thin leaf area, the middle leaf area in the second interval and the thick leaf area in the third interval can effectively separate high-quality tobacco leaf raw materials, thereby achieving the separation and purification of different-quality tobacco flakes.
The invention realizes the winnowing of the tobacco lamina according to the winnowing principle. The tobacco flakes are separated by means of wind power provided by the air supply unit 2, and the force applied to the air inlet of the air supply unit 2 is consistent for each tobacco flake with the same volume, but the same wind power enables the tobacco flakes to fly away at different distances, and the tobacco flakes are thick, large in peduncle, and close in leaf density and leaf mass; on the contrary, the tobacco leaves are thin, the flying distance of the tobacco leaves is long, and the physical indexes of the tobacco leaves falling in the middle position are moderate, so that the tobacco leaves can be divided into sections by the difference of air separation blanking areas according to the characteristics of the physical indexes such as stem content, leaf thickness, leaf surface density, leaf weight and leaf surface moisture content of the leaves. According to the characteristic that physical indexes such as leaf weight and the like are closely related to the quality of tobacco leaves, the area needing blanking can be divided into a thick leaf area 31, a middle leaf area 32 and a thin leaf area 33 which are arranged from near to far, wherein the thick leaf area 31 and the middle leaf area 32 belong to the area with the best quality, and the thin leaf area 33 belongs to the area with the worse quality.
Therefore, the method is based on physical characteristics, the tobacco sheets in different parabolic blanking sections in the parabolic blanking area are divided, the separation of the tobacco sheets with different qualities is realized through the separation of the tobacco sheet blanking area, the online tobacco sheet quality purification process is realized to a greater extent, the method is simple, scientific and reasonable to operate, and the subjectivity and labor cost of manual tobacco sheet selection are reduced.
The online quality improvement method for the tobacco lamina winnowing provided by the embodiment of the invention separates tobacco lamina with different leaf weights, namely tobacco leaves with different qualities are separated, and the purpose of quality classification of the tobacco lamina is achieved; and equipment investment is not required to be increased, the original process flow is not changed, the tobacco sheet sorting efficiency can reach 80 percent, the overall quality structure of tobacco leaves can be improved, and the quality of high-end module tobacco sheets is improved.
Thus far, 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 (5)
1. A threshing and redrying online tobacco lamina winnowing quality improvement method is characterized by comprising the following steps:
the method comprises the following steps of (1) carrying out shunting and spreading treatment on tobacco sheets subjected to threshing and air separation, inputting the tobacco sheets output from a gathering discharge port of threshing and air separation equipment onto 2-3 horizontal conveying belts for shunting, and carrying out spreading and thinning treatment on the tobacco sheets conveyed on the horizontal conveying belts by using a spreading scraper arranged above the horizontal conveying belts;
carrying out air separation treatment on the tiled sheet tobacco to ensure that the sheet tobacco is regularly distributed in a blanking area according to the leaf weight, and blowing the sheet tobacco on the horizontal conveyor belt by using a fan, wherein the width of a blowing port of the fan is matched with the width of the sheet tobacco at the tail end of the horizontal conveyor belt;
according to the variation relation between the physical indexes and the sensory quality of the tobacco sheets subjected to threshing and air separation, the blanking area of the tobacco sheets is divided to realize quality classification, a blanking belt is arranged in the blanking area of the tobacco sheets, a plurality of baffles are arranged on the blanking belt to divide the tobacco sheets in different blanking intervals,
the blanking area of piece cigarette sets up the blanking belt, and set up a plurality of baffles on the blanking belt to cut apart the piece cigarette between different blanking intervals, specifically include:
combining a plurality of blanking sections adjacent to each other on the blanking belt into a blanking interval to obtain a thick leaf area, a middle leaf area and a thin leaf area which are sequentially arranged;
sampling the tobacco flakes in the thick leaf area, the middle leaf area and the thin leaf area in different areas to obtain samples corresponding to the three blanking areas;
respectively measuring physical indexes of samples corresponding to the three blanking intervals, wherein the physical indexes at least comprise the weight of leaves;
respectively carrying out sensory evaluation on the samples corresponding to the three blanking intervals to obtain sensory quality;
establishing an incidence relation between the physical index and the sensory quality;
and determining the setting positions of the two baffles according to the incidence relation between the physical indexes and the sensory quality so as to determine the division limit of the three blanking intervals.
2. The threshing and redrying online tobacco sheet winnowing quality improving method according to claim 1, wherein the speed of the horizontal conveyor belt is 2m/s-3m/s for further spreading the tobacco sheet on the horizontal conveyor belt.
3. The threshing and redrying online tobacco sheet winnowing quality-improving method according to claim 1, wherein the width of the blanking belt is 2m-3m.
4. The threshing and redrying online tobacco slice winnowing quality improvement method according to claim 3, wherein a blanking belt is arranged in a blanking area of the tobacco slice, and a plurality of baffles are arranged on the blanking belt to divide the tobacco slices in different blanking intervals, and the method further comprises the following steps:
the method comprises the following steps of conveying the tobacco flakes in the thick leaf area by using a thick leaf conveying belt, conveying the tobacco flakes in the middle leaf area by using a middle leaf conveying belt, and conveying the tobacco flakes in the thin leaf area by using a thin leaf conveying belt.
5. The threshing and redrying online tobacco lamina air separation quality-improving method according to claim 1, characterized in that the physical indexes of the sample comprise leaf thickness, leaf mass and weight, leaf density and equilibrium moisture content, the physical indexes of the sample corresponding to three blanking intervals are respectively measured, and the method specifically comprises the following steps:
randomly drawing 10 pieces of tobacco, respectively measuring the thickness by using an electric thickness meter, and taking the average value of the thicknesses of 20 points as the thickness of the sample, wherein the thickness unit is mum;
randomly drawing 10 pieces of tobacco, punching 5 round pieces with the diameter D of 10mm by using a round puncher, putting 30 round pieces into a moisture box, drying for 2 hours at 100 ℃, weighing after cooling, and calculating the mass weight of the leaves according to a formula: leaf mass weight (g/m) 2 ) = (weight after baking-weight of moisture box)/[ 30 π (D/2) 2 ]Obtaining the leaf density according to the ratio of the weight to the volume of the tobacco leaves, wherein the unit of the leaf density is mg-cm -3 ；
Randomly drawing 10 pieces of tobacco, cutting the pieces into small pieces with the width not more than 5mm, balancing the small pieces for 24-48 hours under the standard air condition, wherein the standard air condition is that the temperature is 22 +/-1 ℃ and the relative humidity is 60% +/-3%, uniformly mixing, weighing 5g of the test sample by using a sample box with known dry weight, weighing the weighed weight of the test sample, removing a cover, putting the test sample into an oven with the temperature of 100 +/-2 ℃, drying for 2 hours from the temperature rising to 100 ℃, covering, taking out, putting the test sample into a dryer, cooling to room temperature, and weighing again to obtain the balanced water content (%).
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