CN109171006B - Treatment process for improving threshing and air separating efficiency - Google Patents
Treatment process for improving threshing and air separating efficiency Download PDFInfo
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- CN109171006B CN109171006B CN201811260642.XA CN201811260642A CN109171006B CN 109171006 B CN109171006 B CN 109171006B CN 201811260642 A CN201811260642 A CN 201811260642A CN 109171006 B CN109171006 B CN 109171006B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 241000208125 Nicotiana Species 0.000 claims abstract description 107
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims abstract description 107
- 238000000926 separation method Methods 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 abstract description 16
- 206010024796 Logorrhoea Diseases 0.000 description 5
- 235000019504 cigarettes Nutrition 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010009 beating Methods 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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Classifications
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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
Abstract
The invention relates to a treatment process for improving threshing and air separating efficiency, wherein tobacco leaves subjected to moistening treatment enter a horizontal threshing machine set for threshing, so that the tobacco leaves and tobacco stems are continuously separated; the tobacco leaves with stems, the tobacco stems and the qualified tobacco flakes after separation are subjected to air separation preferentially to remove the qualified tobacco flakes through air separation equipment, materials which are not subjected to air separation are firstly screened through a secondary vibrating screen before entering next-stage threshing, the tobacco stems, a small amount of tobacco leaves with stems and broken tobacco are separated, then the tobacco stems, the small amount of tobacco leaves with stems and the broken tobacco are gathered and conveyed to the vibrating screen before returning the stems, the broken tobacco is mixed back to a broken tobacco gathering conveying belt, and most of the remaining tobacco leaves with stems directly enter next-stage threshing. According to the tobacco stem threshing and air separating method, tobacco stems generated in the threshing and air separating processes at all levels are separated in advance, so that the threshing load and the air separating load at the next level are reduced, and the threshing and air separating efficiency of the whole line is improved finally.
Description
Technical Field
The invention relates to the technical field of tobacco threshing and redrying processing, in particular to a treatment process for improving threshing and air separating efficiency.
Technical Field
In threshing and redrying production, most threshing and air separating units serving as key equipment are horizontal, and the threshing and air separating units have the main function of separating leaves and tobacco stems on tobacco leaves by multistage mechanical threshing and multistage air separation, and ensure that all indexes of the separated leaves and tobacco stems meet certain process requirements and meet the process requirements of the next procedure. The threshing air separation unit adopts a working mode of multi-stage shredding and multi-stage air separation, so that the working procedure becomes the largest crushing procedure in threshing and redrying production. How to reduce the breakage of the process is still a more concerned problem in the industry.
The reduction of the broken tobacco depends on the incoming material condition of the tobacco leaves on one hand and also depends on the setting of threshing parameters, the selection of a frame fence and the air separation efficiency of an air separator on the other hand. Under the conditions that the materials have proper temperature and moisture and the material flow is stable, the threshing air separation efficiency is improved, so that the tobacco leaves and tobacco stems after separation can be completely separated out after each stage of threshing air separation, and do not enter the next stage of threshing air separation, and the broken pieces generated by threshing air separation can be fundamentally reduced.
Disclosure of Invention
The invention aims to provide a treatment process for improving threshing and pneumatic separating efficiency aiming at the defects of the existing threshing and pneumatic separating link technology.
The purpose of the invention is realized by the following technical scheme: the method comprises the steps of enabling pretreated tobacco leaves to enter a horizontal threshing machine set for threshing, enabling the tobacco leaves to be torn off from tobacco stems, enabling the torn tobacco leaves with stems, the tobacco stems and free tobacco leaves to pass through air separation equipment, separating free leaves from the tobacco stems and the free tobacco leaves, screening the residual materials through a vibrating screen, separating the tobacco stems, a small amount of tobacco leaves with stems and broken tobacco leaves from the tobacco stems, conducting primary threshing, primary air separation to four-stage threshing and four-stage air separation, conveying the residual tobacco stems and mixed materials of the tobacco leaves with stems after each stage of air separation to a corresponding tobacco stem screening machine through a belt conveyor, collecting and conveying the tobacco stems and the small amount of tobacco leaves with stems to the vibrating screen before returning to the stems after five-stage air separation, mixing the broken tobacco leaves to a broken tobacco collecting and conveying belt, and enabling the obtained smooth stems and tobacco flakes to enter subsequent processes.
The vibrating screen is a double-layer vibrating screen, tobacco leaves with stems are screened by a first-stage vibrating screen from top to bottom, and tobacco stems and a small amount of tobacco leaves with stems are screened by a second-stage vibrating screen. The mesh of the screen of the first-stage vibrating screen is rectangular, the length is selectable within the range of 20mm-35mm, and the width is selectable within the range of 3mm-7 mm. The meshes of the second-stage vibrating screen are circular holes, and the diameter of the second-stage vibrating screen can be selected within the range of 6.35mm-25.4 mm.
The second-stage vibrating screen mesh can select a proper mesh size according to the grade of tobacco leaves, the material state after threshing and air separation or special requirements.
The complete threshing and air separating process and the working principle of the invention are as follows:
the tobacco leaves after pretreatment are subjected to a first-stage threshing unit to realize leaf stem tearing, and then are subjected to air separation equipment to separate free leaves by utilizing the action of wind power. The residual mixed material is separated from the tobacco stems through a vibrating screen, so that the advanced separation of the tobacco stems after the first-stage threshing and air separation is realized, and the treatment process has four stages in total. And conveying the residual mixed materials after each stage of air separation by the air separator to a corresponding vibrating screen for screening through a belt conveyor. The material on the first layer of vibrating screen directly enters the next-stage threshing, the tobacco stems and a small amount of tobacco leaves with stems on the second layer of vibrating screen are gathered and conveyed to the vibrating screen before stem returning, and the crushed tobacco is back mixed to the crushed tobacco gathering conveying belt.
Compared with the prior art, the invention has the following beneficial effects: during the threshing and air classifying process of tobacco leaves, leaf stems are torn off under the tearing action of a threshing roller, free leaves are separated through air classifying equipment, and the residual mixed material of the tobacco leaves with stems and the tobacco stems passes through tobacco stem screening equipment to screen the tobacco stems in advance so as to reduce the threshing load and the air classifying load of the next stage and finally improve the threshing and air classifying load of the whole line
On the premise of not changing the structure of the existing threshing unit, materials (tobacco leaves with stems and tobacco stem mixed materials) which are not separated out by the air separator are further separated by adding a threshing air classification stage vibrating screen, tobacco stems are separated in advance, threshing load and threshing load of the next stage are reduced, threshing does not enter the next stage, threshing load and threshing load of the next stage are reduced, and threshing air classification efficiency of the whole line is improved finally.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
To illustrate the technical content, the achieved objects and effects of the present invention in detail, the following is further described in conjunction with the process flow diagrams and the embodiments:
in this embodiment, a 12000Kg/h threshing and redrying production line is taken as an example, a 12000Kg/h threshing and air separating unit is configured at a leaf and stem separation section, the threshing unit adopts a "five-threshing and eighteen-separating" mode, wherein the number of threshing devices of one to five-stage threshing units adopts a "7-3-2-2-2" combination mode, and the number of air separating devices adopts a "8-4-3-2-1" combination mode.
The vibrating screen is a double-layer vibrating screen, tobacco leaves with stems are screened by a first-stage vibrating screen from top to bottom, and tobacco stems and a small amount of tobacco leaves with stems are screened by a second-stage vibrating screen. The mesh of the screen of the first-stage vibrating screen is rectangular, the length is selectable within the range of 20mm-35mm, and the width is selectable within the range of 3mm-7 mm. The meshes of the second-stage vibrating screen are circular holes, and the diameter of the second-stage vibrating screen can be selected within the range of 6.35mm-25.4 mm.
Because the process for realizing the tobacco stem separation already exists after the final-stage threshing, the invention only aims at the previous-stage threshing air separation to realize the tobacco stem screening and processing process, and the specific steps are as follows:
the tobacco leaves which are pretreated to reach the required temperature and moisture of threshing and air separation pass through a first-stage threshing unit to realize the tearing of leaf stalks, and then pass through a first-stage air separation unit to separate free leaves by the action of wind power. And separating the residual tobacco stems and the mixed material with the stems and the leaves from the tobacco stems by a vibrating screen, thereby realizing the first-level tobacco stem screening and processing technology.
The second, third and fourth stage threshing and air separating process is the same as the first stage, and the first stage is to separate the separated leaves with the leaf stalks separated by the air separator. And then separating tobacco stems and a small amount of tobacco leaves with stems from the residual materials by using a first-stage vibrating screen in the double-layer vibrating screen, and finally screening the broken tobacco mixed in the tobacco stems by using a second-stage vibrating screen.
And conveying the mixture of the residual tobacco stems, tobacco leaves with stems and the like after the air separation of each stage of air separator to a corresponding tobacco stem screening machine through a belt conveyor. The tobacco stems and a small amount of tobacco leaves with stems are conveyed to a vibrating screen before stem returning after five-level air classification in a gathering mode, aiming at a horizontal four-threshing ten-minute unit, the vibrating screen before stem returning is located after eleven-minute air classification, aiming at a horizontal five-threshing eighteen-minute unit, the vibrating screen before stem returning is located after eighteen-minute air classification, and the like. And returning to the stem winnowing, which mainly separates a small amount of tobacco leaves with stems and tobacco flakes mixed in the separated stems, and conveys the separated tobacco leaves with stems and tobacco flakes to the previous stage of threshing and winnowing to complete the separation of the tobacco leaves and stems. Taking the example of five beating and eighteen wind, the material is fed into the four beating wind separation machine through the stem return wind separation and then is blanked before the wind separation, and then is fed into the five beating machine through the four beating wind separation machine to carry out the wind separation of tobacco flakes.
Garrulous cigarette mixes the conveyer belt to garrulous cigarette collection, and this part garrulous cigarette can be gathered the garrulous cigarette of threshing wind subsection at each level and collect the conveyer belt, also can gather the garrulous cigarette production line of threshing redrying production line.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. A method for improving threshing and air separating efficiency is characterized in that: the method comprises the following steps:
the tobacco leaves which are pretreated to reach the required temperature and moisture of threshing air separation sequentially undergo primary threshing to realize leaf stem tearing, then the tobacco leaves are separated through primary air separation, then tobacco leaves with stems are screened out by utilizing a first-stage vibrating screen in a double-layer vibrating screen, tobacco stems, a small amount of tobacco leaves with stems and crushed tobacco are separated by utilizing a second-stage vibrating screen in the double-layer vibrating screen to realize primary tobacco stem screening and processing, the tobacco leaves with stems screened out by the first-stage vibrating screen enter secondary threshing, then secondary air separation is carried out, then the tobacco leaves with stems enter the double-layer vibrating screen, the tobacco leaves with stems screened out by the first-stage vibrating screen enter third-stage threshing, and so on until fifth-stage threshing and fifth-stage air separation, and the tobacco stems are screened and winnowed after the fifth-stage air separation;
the tobacco stems screened by the second-stage vibrating screen are collected and conveyed to a vibrating screen after the five-stage air separation and before the return of the tobacco stems, the tobacco stems are screened and air-separated, the obtained smooth stems enter a subsequent process, and the obtained tobacco leaves with stems and tobacco flakes enter a fourth-stage air separation; the crushed tobacco screened by the second layer of vibrating screen is mixed back to a crushed tobacco gathering conveyor belt; threshing and air separating at each level are carried out by a horizontal threshing and air separating unit;
the horizontal threshing and air separating unit is 12000Kg/h, wherein the number of the threshing devices in the first stage to the fifth stage is 7-3-2-2-2 ', and the number of the threshing devices in the first stage to the fifth stage is 8-4-3-2-1'.
2. The method as claimed in claim 1, wherein the screen mesh of the first stage vibrating screen is rectangular, and has a length of 20mm to 35mm and a width of 3mm to 7 mm; the meshes of the second-stage vibrating screen are circular holes, and the diameter of each circular hole is 6.35mm-25.4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811260642.XA CN109171006B (en) | 2018-10-26 | 2018-10-26 | Treatment process for improving threshing and air separating efficiency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811260642.XA CN109171006B (en) | 2018-10-26 | 2018-10-26 | Treatment process for improving threshing and air separating efficiency |
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| Publication Number | Publication Date |
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| CN109171006A CN109171006A (en) | 2019-01-11 |
| CN109171006B true CN109171006B (en) | 2021-11-02 |
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| CN201811260642.XA Active CN109171006B (en) | 2018-10-26 | 2018-10-26 | Treatment process for improving threshing and air separating efficiency |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110051031A (en) * | 2019-03-11 | 2019-07-26 | 红塔烟草(集团)有限责任公司 | A kind for the treatment of process improving the long stalk rate of beating and double roasting |
| CN111765922B (en) * | 2020-07-08 | 2021-07-06 | 昆明理工大学 | Blade real-time monitoring system and monitoring method based on threshing and fine wind distribution |
| CN111802689A (en) * | 2020-08-12 | 2020-10-23 | 河南中烟工业有限责任公司 | Method for reducing cut stem content of tobacco lamina in threshing and redrying process |
| CN112042997B (en) * | 2020-08-18 | 2022-05-03 | 红塔烟草(集团)有限责任公司 | Energy-saving efficient threshing and air separating system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202738800U (en) * | 2012-08-01 | 2013-02-20 | 华环国际烟草有限公司涡阳烟叶复烤厂 | Tobacco stem return single threshing device |
| CN203492771U (en) * | 2013-06-11 | 2014-03-26 | 红塔烟草(集团)有限责任公司 | Novel efficient and energy-saving threshing and air separation system |
| CN203692514U (en) * | 2013-06-11 | 2014-07-09 | 红塔烟草(集团)有限责任公司 | High efficient energy-saving tobacco-cutting wind-separation equipment |
| CN205993625U (en) * | 2016-08-24 | 2017-03-08 | 红塔烟草(集团)有限责任公司 | With the five wind dispensing units making 18 scores of processing Nicotiana tabacum Lves |
-
2018
- 2018-10-26 CN CN201811260642.XA patent/CN109171006B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202738800U (en) * | 2012-08-01 | 2013-02-20 | 华环国际烟草有限公司涡阳烟叶复烤厂 | Tobacco stem return single threshing device |
| CN203492771U (en) * | 2013-06-11 | 2014-03-26 | 红塔烟草(集团)有限责任公司 | Novel efficient and energy-saving threshing and air separation system |
| CN203692514U (en) * | 2013-06-11 | 2014-07-09 | 红塔烟草(集团)有限责任公司 | High efficient energy-saving tobacco-cutting wind-separation equipment |
| CN205993625U (en) * | 2016-08-24 | 2017-03-08 | 红塔烟草(集团)有限责任公司 | With the five wind dispensing units making 18 scores of processing Nicotiana tabacum Lves |
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