CN113245202A - Internal feeding type flexible winnowing system and method for winnowing tobacco stems - Google Patents
Internal feeding type flexible winnowing system and method for winnowing tobacco stems Download PDFInfo
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- CN113245202A CN113245202A CN202110676392.3A CN202110676392A CN113245202A CN 113245202 A CN113245202 A CN 113245202A CN 202110676392 A CN202110676392 A CN 202110676392A CN 113245202 A CN113245202 A CN 113245202A
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- air separation
- air
- winnowing
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 51
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000000926 separation method Methods 0.000 claims description 116
- 239000000463 material Substances 0.000 claims description 30
- 239000012535 impurity Substances 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 10
- 230000001502 supplementing effect Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 240000001980 Cucurbita pepo Species 0.000 claims description 2
- 235000009852 Cucurbita pepo Nutrition 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
-
- 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
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
Abstract
The invention discloses an internal feeding type flexible winnowing system, wherein a feeding pipeline (2) of the system extends into a winnowing device (1), and the winnowing device (1) is divided into a plurality of winnowing areas. The invention also discloses a method for winnowing tobacco stem shreds by using the internal feeding type flexible winnowing system. The internal feeding type flexible winnowing system avoids stalk filament crushing and increases the winnowing precision.
Description
Technical Field
The invention belongs to the technical field of tobacco equipment, and particularly relates to a flexible winnowing system and method for internal feeding cut stems, which are applied to a cut stem winnowing link in a cigarette cut tobacco manufacturing process.
Background
The air separator is a special device for separating materials in the air separator by utilizing the inertia or gravity settling velocity difference of the materials under wind power, and is widely applied to tobacco, food, farming processing, chemical industry and mining industry. The stem silk winnower is applied to a stem silk winnowing link in a tobacco processing process, is generally arranged between a stem silk drying process and a stem silk flavoring process, winnowes the dried stem silk by utilizing the sedimentation velocity difference between normal stem silk and unqualified stem silk in wind power conveying, removes unqualified stem silks with high density, stem blocks, agglomerated stem silk, non-tobacco sundries and the like, and improves the purity of the stem silk. And (4) after pure and qualified cut stems are screened out, adding fragrance to the cut stems to improve the quality of the cut stems.
The design requirement of an air separator used in the tobacco industry is high, and one reason is that the physical parameter difference between the unqualified cut stems to be separated and the qualified cut stems is small, and more accurate and scientific process parameter design is needed; the second reason is that the crushing of qualified cut stems is reduced as much as possible while the pneumatic separation is realized, because the difference of the sedimentation velocity (inertia) of the cut stem separation is small and the mechanical crushing degree is large.
The cube-shaped throwing type air separator in the prior art is the most widely used stem silk air separator at present, and has the characteristics of no maintenance and high processing capacity. The main structure of the pneumatic stem sliver separator is shown in figure 5, and the pneumatic stem sliver separator comprises a throwing device 20, a single-stage winnowing chamber 21, a stem shred pneumatic conveying pipeline 26, a waste stem sliver discharging hopper 25 at the lower part and the like. The tobacco stem shred winnowing method comprises the following steps: the dried cut stems are thrown to a single-stage winnowing chamber 21 at a high speed by a throwing device 20 to fully disperse the cut stems; meanwhile, part of the stem powder runs out through the stem shred dust removal cover 23; the heavy components contained in the cut stems have different sedimentation speeds from normal cut stems, and the heavy components are settled in the single-stage air separation chamber 21 and discharged through the waste stem discharge hopper 25; the normal cut stems are conveyed to the flavoring process through the air conveying pipeline 26 under the action of negative pressure, and then the cut stems are subjected to subsequent process treatment. The cubic throwing type stem silk air separator in the prior art mainly has the following problems: 1. the feed system is large in size. Because the feeding is carried out by adopting the modes of a material throwing turning plate, a high-speed belt and the like, the mechanical crushing of the cut stems is larger. 2. The 'dead zone' exists in the air separation chamber, part of the cut stems are in a fluidized state at the right-angle wall surface of the air separation chamber and do not reach a conveying state, and the water loss and the breaking are large. 3. The unqualified cut stems have poor removing effect, or the removed material contains more qualified cut stems, or the unqualified cut stems have insufficient removing capability, and the purity cannot meet the requirement.
The present invention has been made to solve the above problems.
Disclosure of Invention
The invention provides a flexible winnowing system for internal feeding cut stems, which is simple in structure, can avoid crushing the materials by mechanical feeding, and can effectively improve winnowing precision and material purity. The pneumatic winnowing machine is used for winnowing tobacco stem shreds, and can effectively improve the winnowing precision of the tobacco stem shreds and improve the purity of the tobacco stem shreds.
The technical scheme of the invention is as follows:
the invention discloses an internal feeding type flexible winnowing system, wherein a feeding pipeline 2 extends into a winnowing device 1, and the winnowing device 1 is divided into a plurality of winnowing areas.
Preferably, the winnowing device 1 is in a gourd shape with a thin waist 110; the winnowing device 1 is divided into two winnowing areas, wherein the upper part of the slender waist 110 is provided with a first winnowing area 111, and the lower part of the slender waist 110 is provided with a second winnowing area 112; the feed duct 2 enters the narrow waist 110 of the air classification device 1 from the side wall of the mouth 113 of the air classification device.
Preferably, the mouth part 113 of the air separation device is connected with an air supply pipeline 10, and the air supply pipeline 10 is connected with an exhaust fan; the bottom of the winnowing device 1 is connected with an air supplementing and impurity removing hopper 3.
Preferably, the air separation device 1 is designed such that: the ratio of the diameter of the mouth 113 of the air separation device, the maximum diameter position of the first air separation area 111, the diameter of the thin waist 110 of the air separation device, the maximum diameter position of the second air separation area 112 and the diameter of the feed opening 114 at the bottom of the second air separation area 112 is 1: 2.95: 1.72: 2.12: 1.58.
Preferably, the internal feeding type flexible air separation system further comprises the following components: the dust hood 4, the material slide way 5, the receiving disc 6 and the discharge hopper 7;
the material slide way 5 is arranged at the opening part of the feeding pipeline 2, and the dust hood 4 is arranged at the upper part of the material slide way 5;
the discharge hopper 7 is arranged at the lower part of the receiving tray 6, and the receiving tray 6 is arranged at the lower part of a feed opening 114 at the bottom of the second air separation area 112.
The invention discloses a method for winnowing tobacco stems by using an internal feeding type flexible winnowing system, which is characterized by comprising the following steps of:
starting an exhaust fan, and exhausting air through an air conveying pipeline 10 by the exhaust fan to form negative pressure in the winnowing device 1; at the moment, the cut tobacco stems fall into the feeding pipeline 2 through the material slide way 5 and enter the thin waist 110 of the air separation device 1; most of the cut tobacco stems enter a first air separation area 111, and pure cut tobacco stems are extracted from the air conveying pipeline 10 after air separation and enter the next working section; part of the heavier cut tobacco stems enter the second air separation area 112 and continue to be subjected to air separation in the second air separation area 112;
meanwhile, the heavier tobacco stalk shreds entering the thin waist 110 of the air separation device 1 enter a second air separation area 112, air is supplemented to the second air separation area 112 through an air supplementing and impurity removing hopper 3, the tobacco stalk shreds are air separated in the second air separation area 112, and the pure tobacco stalk shreds after air separation enter a first air separation area 111 and are discharged from an air conveying pipeline 10 to enter the next working section;
the heavier stem sticks, stem blocks, wet mass stem shreds and non-tobacco impurities after air separation fall into the material receiving disc 6 through a feed opening 114 at the bottom of the second air separation area 112 and are discharged through a discharge hopper 7; and (5) finishing the air separation of the tobacco stem shreds.
The invention has the beneficial effects that:
1. according to the internal feeding type flexible winnowing system, due to the design of an internal feeding type structure and a streamline multistage winnowing area, a material throwing mode is not used, and the phenomenon that stems are broken due to mechanical feeding is avoided; multistage selection by winnowing district design for form different wind speed distributions in different selection by winnowing districts, carry out multistage selection by winnowing to the stalk silk, increased the precision of selection by winnowing, can effectively select out the higher stalk silk of purity.
2. The internal feeding type flexible winnowing device has the advantages of novel and smooth structure, high reliability and convenient operation and maintenance, and is a brand-new and efficient ideal material winnowing device.
Drawings
Fig. 1 is a schematic diagram of an internal feeding type flexible air separation system.
Fig. 2 is a schematic view of an air separation device.
Fig. 3 is a schematic front view of the air separation device.
Fig. 4 is a top view of the air separation device.
Fig. 5 is a schematic view of a cuboidal air classifier.
Reference numerals: 1. a winnowing device; 2. a feed conduit; 3. air supplementing and impurity removing hopper; 4. a dust hood; 5. a material chute; 6. a take-up pan; 7. a discharge hopper; 8. an LED lighting lamp; 9. a support; 10. an air supply pipeline; 11. a frame; 110. thinning the waist; 111. a first wind selection area; 112. a second wind selection area; 113. the mouth part of the air separation device; 114. a feeding port;
20. a material throwing device; 21. a single-stage air separation chamber; 22. a winnowing chamber bracket; 23. a stalk filament dust hood; 24. supplementing air and removing impurities in a hopper; 25. a waste stem discharging hopper; 26. and (5) conveying the cut stems into a pipeline by wind.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding of the skilled person.
As shown in fig. 1-4, an internal feeding type flexible air separation system comprises the following components: the gourd-shaped winnowing device 1 with the thin waist 110 is characterized in that the winnowing device 1 is divided into two winnowing areas, wherein the upper part of the thin waist 110 is a first winnowing area 111, and the lower part of the thin waist 110 is a second winnowing area 112; the feeding pipeline 2 enters the thin waist 110 of the air separation device 1 from the side wall of the opening part 113 of the air separation device; the mouth part 113 of the air separation device is connected with an air supply pipeline 10, and the air supply pipeline 10 is connected with an exhaust fan (not shown); the bottom of the winnowing device 1 is connected with an air supplementing and impurity removing hopper 3 which supplies air supplement to the winnowing device; the winnowing device 1 is structurally designed as follows: the ratio of the diameter of the mouth part 113 of the air separation device, the maximum diameter part of the first air separation area 111, the diameter of the thin waist part 110 of the air separation device, the maximum diameter part of the second air separation area 112 and the diameter of the feed opening 114 at the bottom of the second air separation area 112 is 1: 2.95: 1.72: 2.12: 1.58; the winnowing device 1 is formed by injection molding of a food-grade alexandric mold and is installed through a frame 11.
As shown in fig. 1, the internal feeding type flexible air separation device is mounted on a frame 11. The internal feeding type flexible winnowing system also comprises the following components: the dust hood 4, the material slide way 5, the receiving disc 6 and the discharge hopper 7; these components are device attachments; an LED illuminating lamp can be arranged outside the air separation device 1 and used for observing the air separation condition in the air separation device 1; the material slide way 5 is arranged at the opening part of the feeding pipeline 2, and the dust hood 4 is arranged at the upper part of the material slide way 5; the dust hood 4 and the material slide way 5 are arranged on the bracket 9; the discharge hopper 7 is arranged at the lower part of the receiving tray 6, and the receiving tray 6 is arranged at the lower part of a feed opening 114 at the bottom of the second air separation area 112.
The internal feeding type flexible air separation system is designed into two air separation areas, different air speed distributions are formed in the two air separation areas, multi-stage air separation of the cut stems can be realized, and the air separation efficiency is improved; the feeding pipeline 2 extends into the thin waist 110 inside the air separation device 1, and materials fall into the air separation device 1 from the feeding pipeline 2 for air separation, so that the material throwing during the conveying process is avoided from causing crushing; the winnowing device 1 is structurally designed as follows: the ratio of the diameter of the mouth part 113 of the air separation device, the position with the largest diameter of the first air separation area 111, the diameter of the thin waist part 110 of the air separation device, the position with the largest diameter of the second air separation area 112 and the diameter of the feed opening 114 at the bottom of the second air separation area 112 is 1: 2.95: 1.72: 2.12: 1.58, so that the air speed ratio is 17 m/s: 2 m/s: 6 m/s: 4 m/s: 7m/s, and the optimization of the air separation efficiency is achieved.
The method for winnowing tobacco stem shreds by using the internal feeding type flexible winnowing system comprises the following steps:
starting an exhaust fan, and exhausting air by the exhaust fan through an air conveying pipeline 10 to form negative pressure in the winnowing device 1; at the moment, the cut tobacco stems fall into the feeding pipeline 2 through the material slide way 5 and enter the thin waist 110 of the air separation device 1; most of the cut tobacco stems enter a first air separation area 111, and pure cut tobacco stems subjected to air separation are discharged from an air conveying pipeline 10 and enter the next working section, such as a flavoring working section and the like; part of the heavier cut tobacco stems enter the second air separation area 112 to be continuously subjected to air separation in the second air separation area 112; meanwhile, a small part of the tobacco stems entering the thin waist 110 of the air separation device 1 enter the second air separation area 112, the air supplement impurity removal hopper 3 supplements air to the second air separation area 112, the tobacco stems are separated in the second air separation area 112, and pure tobacco stems after air separation enter the first air separation area 111 and are discharged from the air conveying pipeline 10 to enter the next working section; the heavier tobacco stems such as stem sticks, stem blocks, wet mass stem shreds and non-tobacco impurities after air separation fall into the material receiving disc 6 through a feed opening 114 at the bottom of the second air separation area 112 and are discharged through a discharge hopper 7 for further treatment; and (5) finishing the air separation of the tobacco stem shreds.
The pure tobacco stem shreds are obtained after the internal feeding type flexible winnowing system is used for winnowing the tobacco stems and the cubic throwing type winnowing machine in the prior art is used for winnowing the tobacco stems and the tobacco stems, and the comparison is shown in the following table:
the table shows that the internal feeding type flexible air separation system for air separation of the cut tobacco stems is obviously superior to the cubic throwing type air separator in the prior art, wherein the crushing condition of the cut tobacco stems is obviously improved, and the removal rate of the agglomerated cut tobacco stems reaches 100%.
It should be noted that the above preferred embodiments are only for illustrating the technical solutions of the present invention, and not for limiting, although the present invention has been described in detail through the above preferred embodiments, it should be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the present invention.
Claims (6)
1. An internal feeding type flexible winnowing system is characterized in that a feeding pipeline (2) extends into a winnowing device (1), and the winnowing device (1) is divided into a plurality of winnowing areas.
2. An internal feeding type flexible air separation system as claimed in claim 1, wherein the air separation device (1) is in a gourd shape with a thin waist (110); the air separation device (1) is divided into two air separation areas, wherein the upper part of the thin waist (110) is provided with a first air separation area (111), and the lower part of the thin waist (110) is provided with a second air separation area (112); the feeding pipeline (2) enters the thin waist (110) of the air separation device (1) from the side wall of the opening part (113) of the air separation device.
3. The internal feeding type flexible air separation system according to claim 1, wherein the mouth part (113) of the air separation device is connected with an air supply pipeline (10), and the air supply pipeline (10) is connected with an exhaust fan; the bottom of the winnowing device (1) is connected with an air supplementing and impurity removing hopper (3).
4. An internal feeding flexible air separation system according to claim 2, characterized in that the air separation device (1) is constructed and designed as: the ratio of the diameter of the mouth (113) of the air separation device, the maximum diameter position of the first air separation area (111), the diameter of the thin waist (110) of the air separation device, the maximum diameter position of the second air separation area (112) and the diameter of the feed opening (114) at the bottom of the second air separation area (112) is 1: 2.95: 1.72: 2.12: 1.58.
5. The internal feeding flexible air separation system as claimed in claim 4, further comprising the following components: a dust hood (4), a material slideway (5), a receiving disc (6) and a discharging hopper (7);
the material slide way (5) is arranged at the opening part of the feeding pipeline (2), and the dust hood (4) is arranged at the upper part of the material slide way (5);
the discharging hopper (7) is arranged at the lower part of the material receiving disc (6), and the material receiving disc (6) is arranged at the lower part of the discharging opening (114) at the bottom of the second air separation area (112).
6. The method for air separation of cut tobacco stems by using the internal feeding type flexible air separation system as claimed in any one of claims 1 to 5, which is characterized by comprising the following steps:
starting an exhaust fan, and exhausting air through an air conveying pipeline (10) by the exhaust fan to form negative pressure in the winnowing device (1); at the moment, the cut tobacco stems fall into the feeding pipeline (2) through the material slide way (5) and enter the thin waist (110) of the air separation device (1); most of the cut tobacco stems enter a first air separation area (111), and pure cut tobacco stems are extracted from an air conveying pipeline (10) after air separation and enter the next working section; part of the heavier tobacco stems enter a second air separation area (112) and continue to be subjected to air separation in the second air separation area (112);
meanwhile, the heavier tobacco stem shreds entering the thin waist (110) of the air separation device (1) enter a second air separation area (112), air is supplemented to the second air separation area (112) through an air supplementing and impurity removing hopper (3), the tobacco stem shreds are air separated in the second air separation area (112), the pure tobacco stem shreds after air separation enter a first air separation area (111) and are discharged from an air conveying pipeline (10) to enter the next working section;
the heavier stem sticks, stem blocks, wet mass stem shreds and non-tobacco impurities after air separation fall into a material receiving disc (6) through a feed opening (114) at the bottom of a second air separation area (112) and are discharged through a discharge hopper (7); and (5) finishing the air separation of the tobacco stem shreds.
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| CN202110676392.3A CN113245202B (en) | 2021-06-18 | 2021-06-18 | Internal feeding type flexible winnowing system and tobacco stem shred winnowing method |
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| CN202110676392.3A CN113245202B (en) | 2021-06-18 | 2021-06-18 | Internal feeding type flexible winnowing system and tobacco stem shred winnowing method |
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| CN113245202A true CN113245202A (en) | 2021-08-13 |
| CN113245202B CN113245202B (en) | 2024-03-08 |
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| CN215313951U (en) * | 2021-06-18 | 2021-12-28 | 云南中烟工业有限责任公司 | Interior feed formula flexible air separation system |
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