CN107712998A - A kind of method that offal suitable for kinds of cigarettes sorts - Google Patents
A kind of method that offal suitable for kinds of cigarettes sorts Download PDFInfo
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- CN107712998A CN107712998A CN201711042076.0A CN201711042076A CN107712998A CN 107712998 A CN107712998 A CN 107712998A CN 201711042076 A CN201711042076 A CN 201711042076A CN 107712998 A CN107712998 A CN 107712998A
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- Prior art keywords
- offal
- stalk
- screen cloth
- sieved
- orientation
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- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000004744 fabric Substances 0.000 claims abstract description 39
- 238000012216 screening Methods 0.000 claims abstract description 33
- 238000003860 storage Methods 0.000 claims abstract description 4
- 241000208125 Nicotiana Species 0.000 claims description 21
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 21
- 241000196324 Embryophyta Species 0.000 claims description 12
- 238000010009 beating Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
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
- A24B5/00—Stripping tobacco; Treatment of stems or ribs
- A24B5/16—Other treatment of stems or ribs, e.g. bending, chopping, incising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
Landscapes
- Manufacture Of Tobacco Products (AREA)
Abstract
The invention provides a kind of method that offal suitable for kinds of cigarettes sorts, comprise the following steps：(1) offal primary dcreening operation, (2) are sieved for the first time：Offal obtained by step (1) primary dcreening operation is sieved using the sieve screening plant that shakes with orientation screen cloth 1.；(3) second of screening：Offal obtained by step (2) is divided into two strands, there is the sieve screening plant that shakes of orientation screen cloth 2. to be sieved for first burst of use, and there is the sieve screening plant that shakes of orientation screen cloth 3. to be sieved for second burst of use；(4) second of screening：2. step (3) is sieved to the offal of gained by orientation screen cloth, then sieved using the sieve screening plant that shakes with orientation screen cloth 3.；(5) offal screened out is collected respectively, packed, mark storage.The present invention can carry out processing route selection according to actually required offal species.The present invention improves offal supplied materials quality, so as to improve cabo shredding quality, improves cigarette quality, and ramuscule cigarette stem can be achieved and mix.
Description
Technical field
The present invention relates to technical field of tobacco processing, the side sorted in particular to a kind of offal suitable for kinds of cigarettes
Method.
Background technology
Offal accounts for the 25-30% of leaf weight, and the offal beaten after leaf mixes essentially from tobacco leaf master pulse, length thickness.Existing rank
Offal is only divided into long stalk by the single index of length and is classified and collected with short stalk by section, tobacco business, i.e., long stalk (L ＞
It is specific visible 2001 editions 20mm) with short stalk (L ＜ 20mm) two specifications《YC/T146 tobacco threshing and redrying technological specifications》).With
Length is divided into long stalk, the sorting technique of short stalk is the current way of industry, and this method is fairly simple easy to operate, technical process letter
It is single.But on the one hand this method have ignored influence of different length thickness (diameter) offals to stem quality；Second, by industry mark
In the long stalk that standard is collected containing turn head stalk (Φ ＞ 7mm), overlength stalk (L ＞ 50mm), stalk (L ＜ 20mm, Φ ＜ 3mm) in small, broken bits etc. compared with
It is more, the harmful effects such as sheet stem is more, stalk label are on the high side, overlength stem is higher are caused in stem, these all significantly affect stem
Use, there is no method to use stem in especially current ramuscule cigarette production.
Through consulting, it is more to be related to patent and the document of cabo sifting equipment, processing technology, offal itself quality etc.,
As Chinese patent CN104585857A (a kind of offal reason, pressure device), CN102113701B (mouse-cage tobacco stem screening machine),
CN102894475B (a kind of offal carding equipment), CN104382221 B (a kind of method that offal is processed into stem),
CN102715645A (offal grouping Processing method), CN103181614B (tobacco stalk pretreatment process), CN101708064B are (a kind of
The handling process of manufacturing tobacco cut stems by tobacco stem) etc., such as paper document " chemical composition of offal tobacco leaf fragment and offal and fiber shape
State ", " researchs of the thermal cracking products of cured tobacco leaf and offal " etc..However, it was verified that in production technology bar consistent with equipment
Under part, the offal of different length and diameter has a significant impact to cabo shredding quality, is the key factor for influenceing stem quality；Together
When, by stem morphology influence, existing stem there is no method to be used in ramuscule cigarette.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of method that offal suitable for kinds of cigarettes sorts, carry
High offal supplied materials quality, so as to improve cabo shredding quality, improve cigarette quality, ramuscule cigarette stem can be achieved and mix.
Technical scheme：A kind of method that offal suitable for kinds of cigarettes sorts, comprises the following steps：
(1) offal primary dcreening operation：The online tobacco leaf of beating and double roasting, which feeds intake, beats leaf, leaf stalk classification, and offal is turned into head screening, rejected, institute
Obtain offal and enter screening for the first time；
(2) sieve for the first time：Offal obtained by step (1) primary dcreening operation is entered using the sieve screening plant that shakes with orientation screen cloth 1.
Row screening, screens out the offal of length L ＜ 20mm short thin stalk and L ﹥ 20mm, and the long * of bore size of the orientation screen cloth 1. is wide
For 23mm*5mm, the bottom of the orientation screen cloth 1. is provided with arcuate furrow, groove width 10mm, gash depth 5mm；
(3) second of screening：The offal of L ﹥ 20mm obtained by step (2) is divided into two strands, there is orientation to sieve for first burst of use
The sieve screening plant that shakes of net 2. is sieved, and it is big for 20-50mm, diameter of phi 3-7mm conventional offal, length to screen out length L
Next, rejecting is screened out in 50mm offal and a small amount of head that turns；The bore size a width of 55mm*10mm of long * of the orientation screen cloth 2.,
The bottom of the orientation screen cloth 2. is provided with arcuate furrow, groove width 15mm, gash depth 10mm；Second burst of use has
The sieve screening plant that shakes of orientation screen cloth 3. is sieved, and screens out length L20-50mm, diameter of phi 3-5mm middle stalk, length is big
Next, rejecting is screened out in 50mm offal and a small amount of head that turns；The bore size a width of 55mm*8mm of long * of the orientation screen cloth 3.,
The bottom of the orientation screen cloth 3. is provided with arcuate furrow, groove width 13mm, gash depth 8mm；
(4) third time is sieved：2. step (3) is sieved to the conventional offal of gained by orientation screen cloth, then it is fixed using having
Sieved to the sieve screening plant that shakes of screen cloth 3., screen out L20-50mm, Φ 3-5mm middle stalk and L20-50mm, Φ 5-7mm
The special thick stalk of ramuscule cigarette；
(5) L20-50mm screened out, the conventional of Φ 3-7mm are obstructed, L20-50mm, Φ 3-5mm middle stalk, L20-
50mm, Φ 5-7mm thick stalk, L ＜ 20mm short thin stalk are collected, packed respectively, mark storage.
Further, the length of three kinds of orientation screen clothes is：2800±300mm.
The advantage of the invention is that：, will in two dimensions of length and diameter according to the different length thickness features of offal
Offal is subdivided into the effectively high-quality offal of four classes, improves production of cigarettes offal (conventional stalk, middle stalk, thick stalk) total quality, so as to
Improve stem quality, reduce the more quality problems such as sheet stem, scale stem, stalk label, the offal that the present invention sorts with it is existing
There is Regular offal to compare, turn head stalk, stalk in small, broken bits, the obvious reduction of overlength stalk, quality significantly improves, overall uniformity,
Whole cut rate improves, and filament broken rate reduces, and the comparison that Cheng Sihou rolls into after conventional cigarette with existing stem shows, resistance to suction, net pipe tobacco
Content, end tobacco-falling quantity, percent defective etc. reduce, and cigarette smoke exquisiteness is soft, and excitant reduces, the increase of mouthfeel clean degree,
The increase of pleasant impression comfortableness.Realize that conventional cigarette cigarette composition mixes use using with ramuscule cigarette composition more at high proportion, improve volume
Tobacco quality, while play a part of reducing production of cigarettes cost.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of method for separating of the present invention；
Fig. 2 is the structural representation of present invention orientation screen cloth；
Fig. 3, Fig. 4, Fig. 5 represent on-hand inventory stalk, the present invention conventional stalk sorted and the schematic diagram slightly obstructed respectively；
Fig. 6, Fig. 7, Fig. 8 represent that the conventional stalk after sorting of the invention obstructs into silk figure, slightly into Si Tu and on-hand inventory cigarette respectively
Obstruct into silk figure.
Embodiment
The present invention is described further with reference to the accompanying drawings and examples.
A kind of method that offal suitable for kinds of cigarettes sorts, comprises the following steps：
(1) offal primary dcreening operation：The online tobacco leaf of beating and double roasting, which feeds intake, beats leaf, leaf stalk classification, and offal is turned into head screening, rejected, institute
Obtain offal and enter screening for the first time；
(2) sieve for the first time：Offal obtained by step (1) primary dcreening operation is entered using the sieve screening plant that shakes with orientation screen cloth 1.
Row screening, screens out the offal of length L ＜ 20mm short thin stalk and L ﹥ 20mm, and the long * of bore size of the orientation screen cloth 1. is wide
For 23mm*5mm, the bottom of the orientation screen cloth 1. is provided with arcuate furrow, groove width 10mm, gash depth 5mm；
(3) second of screening：The offal of L ﹥ 20mm obtained by step (2) is divided into two strands, there is orientation to sieve for first burst of use
The sieve screening plant that shakes of net 2. is sieved, and it is big for 20-50mm, diameter of phi 3-7mm conventional offal, length to screen out length L
Next, rejecting is screened out in 50mm offal and a small amount of head that turns；The bore size a width of 55mm*10mm of long * of the orientation screen cloth 2.,
The bottom of the orientation screen cloth 2. is provided with arcuate furrow, groove width 15mm, gash depth 10mm；Second burst of use has
The sieve screening plant that shakes of orientation screen cloth 3. is sieved, and screens out length L20-50mm, diameter of phi 3-5mm middle stalk, length is big
Next, rejecting is screened out in 50mm offal and a small amount of head that turns；The bore size a width of 55mm*8mm of long * of the orientation screen cloth 3.,
The bottom of the orientation screen cloth 3. is provided with arcuate furrow, groove width 13mm, gash depth 8mm；
(4) third time is sieved：2. step (3) is sieved to the conventional offal of gained by orientation screen cloth, then it is fixed using having
Sieved to the sieve screening plant that shakes of screen cloth 3., screen out L20-50mm, Φ 3-5mm middle stalk and L20-50mm, Φ 5-7mm
The special thick stalk of ramuscule cigarette；
(5) L20-50mm screened out, the conventional of Φ 3-7mm are obstructed, L20-50mm, Φ 3-5mm middle stalk, L20-
50mm, Φ 5-7mm thick stalk, L ＜ 20mm short thin stalk are collected, packed respectively, mark storage.
Further, the length of three kinds of orientation screen clothes is：2800±300mm.
For offal after above-mentioned screening, gained offal is divided into conventional stalk, middle stalk, thick stalk, the short thin stalk effective High Quality Tobacco of 4 classes
Stalk, it is respectively conventional stalk：Length L is 20-50mm, diameter of phi 3-7mm；Middle stalk：Length L is 20-50mm, diameter of phi 3-5mm；Slightly
Stalk：Length L is 20-50mm, diameter of phi 5-7mm；Short thin stalk：Length L is less than 20mm.For stem production have it is conventional stalk, in
Three classes of stalk and thick stalk, wherein, conventional stalk and middle stalk are special for conventional cigarette, and thick stalk is special for ramuscule cigarette；Produced for thin slice
It is short thin stalk with offal.
As shown in figure 1, in actual production, according to offal categorised collection demand, sieving technology flow sub-path 1 or road are selected
Footpath 2.
The difference in two kinds of paths is, in path 1, mainly 2. screens out L20-50mm, Φ 3-7mm to oriented screen cloth
The further screening of conventional stalk, 3. dusting cover separates L20-50mm, Φ 3-5mm middle stalk and L20-50mm, Φ to oriented screen cloth
The special thick stalk of 5-7mm ramuscule cigarette.In path 2, L20-50mm, Φ 3-5mm middle stalk are mainly screened out.The present invention can be with
The two kinds of paths selected as needed in method for separating, sub-elect the offal being actually needed.
Experimental program effect analysis：
Sieved using multistage offal criteria for classification according to present invention path 1 as shown in Figure 1, after screening, by offal
Chopping respectively, wherein, conventional stalk pressure stalk thickness 0.8mm, cut stem thickness 0.08mm；Thick stalk pressure stalk thickness 1.0mm, cuts stem thickness
Spend 0.08mm；Middle stalk pressure stalk thickness is 0.6mm, cuts stem thickness 0.08mm.Stem drying, moisture control are carried out using roller
In 12.0-13.5%.
Result of the test is as follows：
(1) compared with the multistage offal classification of the present invention is classified with existing professional standard offal, screening effect such as Fig. 3, Fig. 4 and figure
Shown in 5.Related head stalk rate, stalk rate in small, broken bits, the physical index of overlength stalk rate of turning is as shown in table 1, present invention sorting offal with often
Rule are collected offal and compared, the results showed that：Turn head stalk, stalk in small, broken bits, overlength stalk is obvious reduces, quality significantly improves, it is overall uniformly
Unanimously.
The present invention sorting offal statistical comparison of table 1
(2) present invention sorting offal is compared with silk is made in Regular offal, and experimental result is as shown in table 2, total quality
Significantly improve, stem form is close to pipe tobacco form, and total quality uniformity consistency is good, and sheet stem, stalk label, stalk label etc. are obvious
Reduce, Filling power improves, and whole cut rate improves, and filament broken rate reduces.
The present invention sorting cabo shredding of table 2 compares
(3) stem mixes physical index testing result
After stem is made in of the invention conventional stalk, middle stalk, mixed according to 10% ratio, roll into after conventional cigarette with it is existing
The comparison of stem shows that as a result as shown in table 3, resistance to suction, net tobacco content, end tobacco-falling quantity, percent defective etc. reduce.
Rear physical index of the stem of table 3 mixing compares (conventional cigarette)
| Former stalk filaments of tobacco stalks | Conventional stalk stem of the invention | Stem in the present invention | |
| Weight/g | 0.8739 | 0.8705 | 0.8712 |
| Weight mark is inclined | 0.0176 | 0.0171 | 0.0136 |
| Circumference/mm | 24.214 | 24.191 | 24.201 |
| Circumference mark is inclined | 0.044 | 0.034 | 0.035 |
| Resistance to suction/Kpa | 1.09 | 1.07 | 1.05 |
| Resistance to suction mark is inclined | 0.051 | 0.049 | 0.042 |
| Close resistance to suction/Kpa | 1.163 | 1.136 | 1.122 |
| It is inclined to close resistance to suction mark | 0.054 | 0.060 | 0.053 |
| End tobacco-falling quantity/mg | 14.55 | 7.90 | 9.65 |
| Net tobacco content/mg | 598.62 | 592.18 | 592.49 |
| Total percent defective/% | 3.46 | 0.4 | 0.59 |
(4) after stem is made in the thick stalk of the present invention, mixed with 5% ratio into certain specification ramuscule cigarette product, and through specialty
The personnel that smoke panel test smoke panel test with the existing ramuscule cigarette of the specification (stem is mixed as 0) contrast, are put into smoking result as shown in table 4 and show：
After thick stalk stem of the invention, cigarette smoke exquisiteness is soft, and excitant reduces, the increase of mouthfeel clean degree, the increase of pleasant impression comfortableness.This
Invention can solve the problem that current ramuscule cigarette stem there is no method to use.
The present invention sorting special stalk filaments of tobacco stalks of ramuscule cigarette of table 4 mixes rear judging parameter
The detailed description of specific embodiments of the present invention is the foregoing is only, the present invention is not limited with this, it is all at this
All any modification, equivalent and improvement made in the mentality of designing of invention etc., should be included in protection scope of the present invention it
It is interior.
Claims (2)
1. a kind of method that offal suitable for kinds of cigarettes sorts, it is characterised in that comprise the following steps：
(1) offal primary dcreening operation：The online tobacco leaf of beating and double roasting, which feeds intake, beats leaf, leaf stalk classification, and offal is turned into head screening, rejected, gained cigarette
Stalk enters to be sieved for the first time；
(2) sieve for the first time：Offal obtained by step (1) primary dcreening operation is sieved using the sieve screening plant that shakes with orientation screen cloth 1.
Divide, screen out the offal of length L ＜ 20mm short thin stalk and L ﹥ 20mm, the long * of bore size of the orientation screen cloth 1. is a width of
23mm*5mm, the bottom of the orientation screen cloth 1. are provided with arcuate furrow, groove width 10mm, gash depth 5mm；
(3) second of screening：The offal of L ﹥ 20mm obtained by step (2) is divided into two strands, 2. first burst of use has orientation screen cloth
The sieve screening plant that shakes sieved, screen out length L as 20-50mm, diameter of phi 3-7mm conventional offal, length is more than
50mm offal and a small amount of head that turns screen out next, rejecting；The bore size a width of 55mm*10mm of long * of the orientation screen cloth 2., institute
State the bottom of orientation screen cloth 2. and be provided with arcuate furrow, groove width 15mm, gash depth 10mm；It is fixed that second burst of use has
Sieved to the sieve screening plant that shakes of screen cloth 3., screen out length L20-50mm, diameter of phi 3-5mm middle stalk, length is more than
50mm offal and a small amount of head that turns screen out next, rejecting；The bore size a width of 55mm*8mm of long * of the orientation screen cloth 3., institute
State the bottom of orientation screen cloth 3. and be provided with arcuate furrow, groove width 13mm, gash depth 8mm；
(4) third time is sieved：2. step (3) is sieved to the conventional offal of gained by orientation screen cloth, then using with orientation sieve
Net 3. shake sieve screening plant sieved, screen out L20-50mm, Φ 3-5mm middle stalk and L20-50mm, Φ 5-7mm it is thin
The special thick stalk of branch cigarette；
(5) L20-50mm screened out, the conventional of Φ 3-7mm are obstructed, L20-50mm, Φ 3-5mm middle stalk, L20-50mm, Φ
5-7mm thick stalk, L ＜ 20mm short thin stalk are collected, packed respectively, mark storage.
2. the method that the offal according to claim 1 suitable for kinds of cigarettes sorts, it is characterised in that：Described in three kinds
Orientation screen cloth length be：2800±300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042076.0A CN107712998A (en) | 2017-10-31 | 2017-10-31 | A kind of method that offal suitable for kinds of cigarettes sorts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042076.0A CN107712998A (en) | 2017-10-31 | 2017-10-31 | A kind of method that offal suitable for kinds of cigarettes sorts |
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| Publication Number | Publication Date |
|---|---|
| CN107712998A true CN107712998A (en) | 2018-02-23 |
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ID=61202417
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711042076.0A Pending CN107712998A (en) | 2017-10-31 | 2017-10-31 | A kind of method that offal suitable for kinds of cigarettes sorts |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108968127A (en) * | 2018-06-07 | 2018-12-11 | 四川中烟工业有限责任公司 | A kind of processing technology of high-curl-flexibility filiform stem |
| CN109549245A (en) * | 2018-11-20 | 2019-04-02 | 云南中烟工业有限责任公司 | A kind of screening group technology of tobacco stalk raw material and its application in reconstituted tobacco |
| CN110174490A (en) * | 2019-05-27 | 2019-08-27 | 安徽中烟工业有限责任公司 | A kind of confining method of offal label form |
| CN112167698A (en) * | 2019-07-02 | 2021-01-05 | 红塔烟草(集团)有限责任公司 | Method for improving screening purity of long stems |
| CN113615858A (en) * | 2021-07-19 | 2021-11-09 | 天昌国际烟草有限公司天昌复烤厂 | Tobacco stem separating device, tobacco stem screening machine manufactured by same and screening method using tobacco stem screening machine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108968127A (en) * | 2018-06-07 | 2018-12-11 | 四川中烟工业有限责任公司 | A kind of processing technology of high-curl-flexibility filiform stem |
| CN109549245A (en) * | 2018-11-20 | 2019-04-02 | 云南中烟工业有限责任公司 | A kind of screening group technology of tobacco stalk raw material and its application in reconstituted tobacco |
| CN110174490A (en) * | 2019-05-27 | 2019-08-27 | 安徽中烟工业有限责任公司 | A kind of confining method of offal label form |
| CN110174490B (en) * | 2019-05-27 | 2021-08-31 | 安徽中烟工业有限责任公司 | Method for defining shape of tobacco stem label |
| CN112167698A (en) * | 2019-07-02 | 2021-01-05 | 红塔烟草(集团)有限责任公司 | Method for improving screening purity of long stems |
| CN112167698B (en) * | 2019-07-02 | 2022-06-07 | 红塔烟草(集团)有限责任公司 | Method for improving screening purity of long stems |
| CN113615858A (en) * | 2021-07-19 | 2021-11-09 | 天昌国际烟草有限公司天昌复烤厂 | Tobacco stem separating device, tobacco stem screening machine manufactured by same and screening method using tobacco stem screening machine |
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